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Priyadarshini E, Minzar M, Pandey S, Rawat K. Synergistic reduction of nitrophenols by Au-CDs nanoconjugates with NaBH 4. Nanotechnology 2024; 35:275101. [PMID: 38502954 DOI: 10.1088/1361-6528/ad355a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Accepted: 03/19/2024] [Indexed: 03/21/2024]
Abstract
Developing sustainable and innovative approaches for the efficient reduction of nitrophenols is crucial for environmental remediation, for managing health concerns posed by their widespread presence as hazardous pollutants in industrial effluents and contaminated water. We report the use of 12.9 ± 1 nm (TEM data) sized gold carbon dot nanoconjugates (Au@CDs) for catalytic conversion of o, m, p-nitrophenols to aminophenols by sodium borohydride. A simple approach was followed to synthesize ultra-small and highly stable Au@CDs, using citric acid and PEG as reducing and stabilizing agents. X-ray diffraction analysis verified the formation of nano-crystalline nanoconjugates. These nanoconjugates showed a remarkable catalytic activity in the range of 0.22-0.33 s-1(varying with nanoconjugate concentration) which was much higher compared to conventional chemical methods of reduction. All the catalytic reaction experiments were performed at room temperature (27 ± 2 °C). Furthermore, an increase in rate constant was observed with increasing concentration of nanoconjugates. The catalytic activity of Au@CDs nanoconjugates was observed to be in order of m-nitrophenol > o-nitrophenol > p-nitrophenol with apparent rate constant (kaap) values of 0.068, 0.043 and 0.031, respectively. Comparative analysis with GNPs, CDs and Au@CDs nanoconjugates stated that the nanoconjugates had superior catalytic activity. The research can have significant implications in the development of new strategies for environmental remediation and biomedical applications.
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Affiliation(s)
| | - Mohd Minzar
- Department of Chemistry, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi, India
| | - Saurabh Pandey
- Department of Biochemistry, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi, India
| | - Kamla Rawat
- Department of Chemistry, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi, India
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2
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Santos ASGG, Restivo J, Orge CA, Pereira MFR, Soares OSGP. Synthesis of monometallic macrostructured catalysts for bromate reduction in a continuous catalytic system. Environ Technol 2023; 44:3834-3849. [PMID: 35510899 DOI: 10.1080/09593330.2022.2074319] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 04/22/2022] [Indexed: 06/14/2023]
Abstract
The last few years have seen great leaps in the use of mechano-chemically modified carbon nanotubes in catalysis. While high improvements in catalytic performance have been achieved, the nature of the technique is not compatible with typical strategies for CNT coating of macro-structured catalysts by chemical vapour deposition. Developing macro-structured catalysts is a key step towards the sustainability of multi-phase catalysis and requires a methodology for coating with mechano-chemical modified CNT metallic catalysts. Preparing water-based slurries is not straightforward due to the CNT's hydrophobicity, and the use of organic solvents is unsustainable. A novel methodology for the washcoating of macro-structures with pre-modified monometallic CNT catalysts was assessed. A compromise between surfactant use, post-coating treatment, and the catalyst activity/integrity, was achieved by solubilization of the surfactant in a isopropanol:acetone mixture. The activity of the prepared catalysts was affected by the metallic dispersion, surfactant coverage, and distribution of the palladium throughout the catalytic layer. Palladium centres in the bottommost layers were found to be unavailable for liquid phase reaction. The activity of the catalysts prepared with pre-formed carbon monometallic powders was improved by adopting a coating strategy to maximize the availability of the metallic particles near the surface of the catalytic layer.
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Affiliation(s)
- A Sofia G G Santos
- Faculdade de Engenharia, Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Universidade do Porto, Porto, Portugal
- Faculty of Engineering, ALiCE - Associate Laboratory in Chemical Engineering, University of Porto, Porto, Portugal
| | - João Restivo
- Faculdade de Engenharia, Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Universidade do Porto, Porto, Portugal
- Faculty of Engineering, ALiCE - Associate Laboratory in Chemical Engineering, University of Porto, Porto, Portugal
| | - Carla A Orge
- Faculdade de Engenharia, Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Universidade do Porto, Porto, Portugal
- Faculty of Engineering, ALiCE - Associate Laboratory in Chemical Engineering, University of Porto, Porto, Portugal
| | - M Fernando R Pereira
- Faculdade de Engenharia, Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Universidade do Porto, Porto, Portugal
- Faculty of Engineering, ALiCE - Associate Laboratory in Chemical Engineering, University of Porto, Porto, Portugal
| | - O Salomé G P Soares
- Faculdade de Engenharia, Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Universidade do Porto, Porto, Portugal
- Faculty of Engineering, ALiCE - Associate Laboratory in Chemical Engineering, University of Porto, Porto, Portugal
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Hu J, Zheng H, Li L, Chen G, Li K, Qi M, Zhang Y, Zhao P, Meng W, Jia S, Wang J. Probing the Atomistic Reaction Pathways in CuO/C Catalysts. Nano Lett 2023; 23:9367-9374. [PMID: 37807279 DOI: 10.1021/acs.nanolett.3c02651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
CuOx/C catalysts have been used in the selective catalytic reduction of NOx because of the exceptional low-temperature denitration (de-NOx) activity. A fundamental understanding of the reaction between CuO and C is critical for controlling the component of CuOx/C and thus optimizing the catalytic performance. In this study, a transmission electron microscope equipped with an in situ heating device was utilized to investigate the atomic-scale reaction between CuO and C. We report two reaction mechanisms relying on the volume ratio between C and CuO: (1) The reduction from CuO to Cu2O (when the ratio is < ∼31%); (2) the reduction of CuO into polycrystalline Cu (when the ratio is > ∼34%). The atomistic reduction pathway can be well interpreted by considering the diffusion of O vacancy through the first-principle calculations. The atomic-scale exploration of CuO/C offers ample prospects for the design of industrial de-NOx catalysts in the future.
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Affiliation(s)
- Jie Hu
- School of Physics and Technology, Center for Electron Microscopy, MOE Key Laboratory of Artificial Micro- and Nano-structures, and Institute for Advanced Studies, Wuhan University, Wuhan 430072, China
| | - He Zheng
- School of Physics and Technology, Center for Electron Microscopy, MOE Key Laboratory of Artificial Micro- and Nano-structures, and Institute for Advanced Studies, Wuhan University, Wuhan 430072, China
- Wuhan University Shenzhen Research Institute, Shenzhen, Guangdong 518057, China
| | - Lei Li
- Core Facility of Wuhan University, Wuhan 430072, China
| | - Guoxujia Chen
- School of Physics and Technology, Center for Electron Microscopy, MOE Key Laboratory of Artificial Micro- and Nano-structures, and Institute for Advanced Studies, Wuhan University, Wuhan 430072, China
| | - Kaixuan Li
- School of Physics and Technology, Center for Electron Microscopy, MOE Key Laboratory of Artificial Micro- and Nano-structures, and Institute for Advanced Studies, Wuhan University, Wuhan 430072, China
| | - Meng Qi
- School of Physics and Technology, Center for Electron Microscopy, MOE Key Laboratory of Artificial Micro- and Nano-structures, and Institute for Advanced Studies, Wuhan University, Wuhan 430072, China
| | - Ying Zhang
- Core Facility of Wuhan University, Wuhan 430072, China
| | - Peili Zhao
- School of Physics and Technology, Center for Electron Microscopy, MOE Key Laboratory of Artificial Micro- and Nano-structures, and Institute for Advanced Studies, Wuhan University, Wuhan 430072, China
| | - Weiwei Meng
- School of Physics and Technology, Center for Electron Microscopy, MOE Key Laboratory of Artificial Micro- and Nano-structures, and Institute for Advanced Studies, Wuhan University, Wuhan 430072, China
| | - Shuangfeng Jia
- School of Physics and Technology, Center for Electron Microscopy, MOE Key Laboratory of Artificial Micro- and Nano-structures, and Institute for Advanced Studies, Wuhan University, Wuhan 430072, China
| | - Jianbo Wang
- School of Physics and Technology, Center for Electron Microscopy, MOE Key Laboratory of Artificial Micro- and Nano-structures, and Institute for Advanced Studies, Wuhan University, Wuhan 430072, China
- Core Facility of Wuhan University, Wuhan 430072, China
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Alkayal NS, Ibrahim M, Tashkandi N, Alotaibi MM. Efficient Reduction in Methylene Blue Using Palladium Nanoparticles Supported by Melamine-Based Polymer. Materials (Basel) 2023; 16:5887. [PMID: 37687576 PMCID: PMC10488429 DOI: 10.3390/ma16175887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 06/30/2023] [Accepted: 08/09/2023] [Indexed: 09/10/2023]
Abstract
In this work, palladium nanoparticles, supported by polyaminals (Pd@PAN-NA), were synthesized via a reverse double solvent approach and used as a nano catalyst. The thermogravimetric and the elemental analysis revealed that the catalyst had good dispersity and improved thermal stability. The catalytic activity of the prepared Pd@PAN-NA catalyst was studied for a methylene blue chemical reaction in the presence of NaBH4 as a reducing agent. The effect of the catalyst dose, pH, and dye initial concentration were examined to optimize the chemical reduction conditions. The prepared catalyst Pd@PAN-NA removed 99.8% of methylene blue organic dye, indicating its potential effect for treating waste and contaminated water.
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Affiliation(s)
- Nazeeha S. Alkayal
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; (M.I.); (N.T.); (M.M.A.)
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Kang Z, Gao H, Ma X, Jia X, Wen D. Fe-Ni/MWCNTs Nano-Composites for Hexavalent Chromium Reduction in Aqueous Environment. Molecules 2023; 28:molecules28114412. [PMID: 37298888 DOI: 10.3390/molecules28114412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 05/26/2023] [Accepted: 05/27/2023] [Indexed: 06/12/2023] Open
Abstract
A novel Cr (VI) removal material was designed and produced comprising multi-walled carbon nanotubes (MWCNTs) as a support with a high specific surface area and the loaded Fe-Ni bimetallic particles as catalytic reducing agents. Such a design permits the composite particle to perform the adsorption, reduction, and immobilisation of Cr (VI) quickly and efficiently. Due to MWCNTs' physical adsorption, Cr (VI) in solution aggregates in the vicinity of the composite, and Fe rapidly reduces Cr (VI) to Cr (III) catalysed by Ni. The results demonstrated that the Fe-Ni/MWCNTs exhibits an adsorption capacity of 207 mg/g at pH = 6.4 for Cr (VI) and 256 mg/g at pH 4.8, which is about twice those reported for other materials under similar conditions. The formed Cr (III) is solidified to the surface by MWCNTs and remains stable for several months without secondary contamination. The reusability of the composites was proven by retaining at least 90% of the adsorption capacity for five instances of reutilization. Considering the facile synthesis process, low cost of raw material, and reusability of the formed Fe-Ni/MWCNTs, this work shows great potential for industrialisation.
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Affiliation(s)
- Zeyu Kang
- School of Chemical and Process Engineering, University of Leeds, Leeds LS2 9JT, UK
| | - Hui Gao
- School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China
| | - Xiaolong Ma
- School of Chemical and Process Engineering, University of Leeds, Leeds LS2 9JT, UK
| | - Xiaodong Jia
- School of Chemical and Process Engineering, University of Leeds, Leeds LS2 9JT, UK
| | - Dongsheng Wen
- School of Chemical and Process Engineering, University of Leeds, Leeds LS2 9JT, UK
- School of Engineering and Design, Technische Universität München, 85747 Garching, Germany
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Da’na E, Taha A, El-Aassar MR. Catalytic Reduction of p-Nitrophenol on MnO 2/Zeolite -13X Prepared with Lawsonia inermis Extract as a Stabilizing and Capping Agent. Nanomaterials (Basel) 2023; 13:785. [PMID: 36839153 PMCID: PMC9960385 DOI: 10.3390/nano13040785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 02/12/2023] [Accepted: 02/18/2023] [Indexed: 06/18/2023]
Abstract
p-nitrophenol (pNP) is a highly toxic organic compound and is considered carcinogenic and mutagenic. It is a very stable compound with high resistance to chemical or biological degradation. As a result, the elimination of this pollutant has been very challenging for many researchers. Catalytic reduction is one of the most promising techniques, if a suitable catalyst is developed. Thus, this work aims to prepare an eco-friendly catalyst via a simple and low-cost route and apply it for the conversion of the toxic p-nitrophenol (pNP) into a non-toxic p-aminophenol (pAP) that is widely used in industry. Manganese oxide was prepared in an environmentally friendly manner with the aid of Lawsonia inermis (henna) extract as a stabilizing and capping agent and loaded on the surface of 13X molecular sieve zeolite. The UV-Vis spectrum, EDS, and XRD patterns confirmed the formation of the pure MnO2 loaded on the zeolite crystalline network. The TGA analysis showed that the samples prepared by loading MnO2 on zeolite (Mn2Z, Mn3Z, and Mn4Z) lost more mass than pure MnO2 (Mn) or zeolite (Z), which is mainly moisture adsorbed on the surface. This indicates a better dispersion of MnO2 on the surface of zeolite compared to pure MnO2, and thus a higher number of active adsorption sites. SEM images and EDS confirmed the dispersion of the MnO2 on the surface of the zeolite. Results showed a very fast reduction rate, following the order Mn2Z > Mn3Z > Mn4Z > Mn > Z. With sample Mn2Z, 96% reduction of pNP was achieved in 9 min and 100% in 30 min. For Mn3Z, Mn4Z, and Mn, 98% reduction was achieved in 20 min and 100% in 30 min. Zeolite was the slowest, with only a 40% reduction in 30 min. Increasing the amount of zeolite in the synthesis mixture resulted in lower reduction efficiency. The kinetic study indicated that the reduction of p-nitrophenol on the surface of the prepared nanocomposite follows the pseudo-first-order model. The results show that the proposed nanocomposite is very effective and very promising to be commercially applied in water treatment, due to its low cost, simple synthesis procedure, and reusability.
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Affiliation(s)
- Enshirah Da’na
- Department of Biomedical Engineering, King Faisal University, P.O. Box 400, Alahsa 31982, Saudi Arabia
| | - Amel Taha
- Department of Chemistry, King Faisal University, P.O. Box 400, Alahsa 31982, Saudi Arabia
- Department of Chemistry, Faculty of Science and Technology, Al-Neelain University, Khartoum 1112, Sudan
| | - Mohamed R. El-Aassar
- Department of Chemistry, College of Science, Jouf University, Sakaka 2014, Saudi Arabia
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SALİM FS, SARGIN İ, ARSLAN G. Carbon quantum dots and chitosan-based heterogeneous silver catalyst for reduction of nitroaromatic compounds. Turk J Chem 2022; 47:148-163. [PMID: 37720867 PMCID: PMC10504001 DOI: 10.55730/1300-0527.3525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 02/20/2023] [Accepted: 11/18/2022] [Indexed: 02/25/2023] Open
Abstract
Chitosan plays a crucial role in catalysis, environmental remediation, and sustainable chemistry as a renewable and cationic polysaccharide. Chitosan-based metal catalysts are used in a broad range of chemical transformations. In the study, carbon quantum dots (CQDs) were derived from Momordica charantia fruits by microwave irradiation following a green chemistry approach. Three catalysts were designed: Ag(0)-chitosan, Ag(0)-chitosan-M. charantia fruit powder, and Ag(0)-chitosan-CQDs. The catalyst supports were prepared by stabilizing CQDs or M. charantia powder within the polymeric matrix of chitosan beads. Metallic silver particles were anchored onto glutaraldehyde cross-linked chitosan beads from the aqueous solution of silver nitrate. The heterogeneous silver catalysts were used to reduce toxic nitroaromatics (4-nitrophenol, 2-nitroaniline, 1,2-diamino-4-nitrobenzene, 2,4-dinitrophenol). The regeneration of catalysts was also covered. The reused catalysts retained their catalytic activities after ten cycles. The study suggested that presence of CQDs or M. charantia powder could improve the efficiency of the chitosan-based metallic silver catalysts.
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Affiliation(s)
- Farah Samir SALİM
- Department of Biochemistry, Faculty of Science, Selçuk University, Konya,
Turkey
| | - İdris SARGIN
- Department of Biochemistry, Faculty of Science, Selçuk University, Konya,
Turkey
| | - Gülşin ARSLAN
- Department of Biochemistry, Faculty of Science, Selçuk University, Konya,
Turkey
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Affiliation(s)
- Philip K Hopke
- Department of Public Health Sciences, University of Rochester School of Medicine and Dentistry, Rochester, New York 14642, United States
- Institute for a Sustainable Environment, Clarkson University, Potsdam, New York 13699-5708, United States
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Wang M, Chen D, Li N, Xu Q, Li H, He J, Lu J. Ni-Co Bimetallic Hydroxide Nanosheet Arrays Anchored on Graphene for Adsorption-Induced Enhanced Photocatalytic CO 2 Reduction. Adv Mater 2022; 34:e2202960. [PMID: 35534233 DOI: 10.1002/adma.202202960] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 04/26/2022] [Indexed: 06/14/2023]
Abstract
Photocatalytic CO2 reduction can be implemented to use CO2 , a greenhouse gas, as a resource in an energy-saving and environmentally friendly way, in which suitable catalytic materials are required to achieve high-efficiency catalysis. Insufficient accessible active sites on the catalyst surface and inhibited electron transfer severely limit the photocatalytic performance. Therefore, porous aerogels are constructed from composites comprising different ratios of Ni-Co bimetallic hydroxide (Nix Coy ) grown on reduced graphene oxide (GR) into a hierarchical nanosheet-array structure using a facile in situ growth method. Detailed characterization shows that this structure exposes numerous active sites for enhanced adsorption-induced photocatalytic CO2 reduction. Moreover, under the synergistic effect of Ni-Co bimetallic hydroxide, the CO2 adsorption capacity as well as charge-carrier separation and transfer are excellent. As a result, the Ni7 Co3 -GR catalyst exhibits highly improved catalytic performance when compared with recently reported values, with a high CO release rate of 941.5 µmol h-1 g-1 and a selectivity of 96.3% during the photocatalytic reduction of CO2 . This work demonstrates a new strategy for designing nanocomposites with abundant active sites structures.
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Affiliation(s)
- Mengmeng Wang
- Collaborative Innovation Center of Suzhou Nano Science and Technology, College of Chemistry Chemical Engineering and Materials Science Soochow University, 199 Ren'ai Road, Suzhou, 215123, P.R. China
| | - Dongyun Chen
- Collaborative Innovation Center of Suzhou Nano Science and Technology, College of Chemistry Chemical Engineering and Materials Science Soochow University, 199 Ren'ai Road, Suzhou, 215123, P.R. China
| | - Najun Li
- Collaborative Innovation Center of Suzhou Nano Science and Technology, College of Chemistry Chemical Engineering and Materials Science Soochow University, 199 Ren'ai Road, Suzhou, 215123, P.R. China
| | - Qingfeng Xu
- Collaborative Innovation Center of Suzhou Nano Science and Technology, College of Chemistry Chemical Engineering and Materials Science Soochow University, 199 Ren'ai Road, Suzhou, 215123, P.R. China
| | - Hua Li
- Collaborative Innovation Center of Suzhou Nano Science and Technology, College of Chemistry Chemical Engineering and Materials Science Soochow University, 199 Ren'ai Road, Suzhou, 215123, P.R. China
| | - Jinghui He
- Collaborative Innovation Center of Suzhou Nano Science and Technology, College of Chemistry Chemical Engineering and Materials Science Soochow University, 199 Ren'ai Road, Suzhou, 215123, P.R. China
| | - Jianmei Lu
- Collaborative Innovation Center of Suzhou Nano Science and Technology, College of Chemistry Chemical Engineering and Materials Science Soochow University, 199 Ren'ai Road, Suzhou, 215123, P.R. China
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Wang Q, Wei Z, Li J, Feng D, Feng A, Zhang H. Hierarchical-Structured Pd Nanoclusters Catalysts x-PdNCs/CoAl(O)/rGO- T by the Captopril-Capped Pd Cluster Precursor Method for the Highly Efficient 4-Nitrophenol Reduction. ACS Appl Mater Interfaces 2022; 14:27775-27790. [PMID: 35679591 DOI: 10.1021/acsami.2c01378] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Water-soluble captopril-capped atomically precise Pd nanoclusters (Pd17Capt8 NCs: 1.3 ± 0.5 nm) produced by a simple chemical reduction were supported on preprepared hybrid Co3Al-layered double hydroxide/reduced graphene oxide (Co3Al-LDH/rGO) by a pH-adjusted electrostatic adsorption strategy followed by proper calcinations, giving a series of novel catalysts x-PdNCs/CoAl(O)/rGO-T (x (Pd loading) = 0.09, 0.17, 0.43 wt % (ICP), T = 230, 250, 280, 300, 320 °C). The characterization results show that the as-obtained catalysts possess the hierarchical nanosheet array morphology. Pd NCs with a size of ∼1.3 to 1.8 nm are highly distributed at the edge sites of the CoAl(O) nanosheets. All of the x-PdNCs/CoAl(O)/rGO-T catalysts show superior catalytic efficiency for the conversion of 4-nitrophenol to 4-aminophenol, particularly 0.17-PdNCs/CoAl(O)/rGO-300 possesses the highest performance with a turnover frequency (TOF) of 30 042 h-1, which is the highest among the reported Pd-based catalysts so far. The superior activity of 0.17-PdNCs/CoAl(O)/rGO-300 can be owing to ultrafine Pd NCs with a clean surface, the strongest PdNCs-Co2+-OH(LDH)-rGO three-phase synergy, and the much improved adsorption of the substrate via π-π stacking upon nanosheet array morphology. Meanwhile, 0.17-PdNCs/CoAl(O)/rGO-300 exhibits excellent catalytic activities for various nitroarenes and anionic azo dyes as well as good reusability with the complete reduction of 4-nitrophenol (4-NP) within 90 s after 10 successive runs. The present work provides not only a simple and convenient strategy for the synthesis of clean, efficient, and environmentally friendly supported metal nanocluster catalysts but also a new idea for the efficient catalytic degradation of environmental pollutants.
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Affiliation(s)
- Qinglin Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beijing 100029, China
| | - Zhuojun Wei
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beijing 100029, China
| | - Jin Li
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beijing 100029, China
| | - Danyang Feng
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beijing 100029, China
| | - An Feng
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beijing 100029, China
| | - Hui Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beijing 100029, China
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Feng D, Wei Z, Wang Q, Feng A, Zhang H. Controllable Synthesis of Cobalt-Containing Nanosheet Array-Like Ternary CuCoAl-LDH/rGO Hybrids To Boost the Catalytic Efficiency for 4-Nitrophenol Reduction. ACS Appl Mater Interfaces 2022; 14:24265-24280. [PMID: 35604135 DOI: 10.1021/acsami.2c01637] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A series of Co-doped ternary CuxCo3-xAl-layered double hydroxide (LDH)/rGO nanosheet array hybrids (x = 0.5, 1.0, 1.5, and 2.0) were successfully prepared using the preconditioned pH value aqueous-phase coprecipitation strategy. The CuxCo3-xAl-LDH/rGO hybrids are featured as hexagonal CuCoAl-LDH nanosheets in situ anchoring onto both sides of the rGO surface in an ab-plane vertically interlaced growth pattern. The CuxCo3-xAl-LDH/rGO hybrids show excellent activity for the complete conversion of 4-nitrophenol to 4-aminophenol, especially Cu1.5Co1.5Al-LDH/rGO with the highest kapp value of 49.2 × 10-3 s-1 and TOF of 232.8 h-1, clearly higher than most copper-containing samples in the literature and even some precious ones. Thermodynamic analysis was carried out, and the values of Ea, ΔH#, ΔS#, and ΔG# were estimated. The best activity of Cu1.5Co1.5Al-LDH/rGO can be mainly ascribed to the in situ-formed ultrafine Cu2O NPs (∼4.3 nm) along with a small amount of Cu0 species, the electron transfer effect induced by atomically dispersed Co2+ species leading to the formation of electron-rich Cu species along with the Co2+/Co3+ redox couple, the strong Cu2O-CuCoAl-LDH-rGO synergy upon the nanosheet array morphology with a high surface area and pore volume, and enhanced adsorption of reactants upon π-π stacking via an rGO layer. Meanwhile, the Cu1.5Co1.5Al-LDH/rGO exhibits an excellent universality and good cycling stability for 10 continuous runs. The Cu1.5Co1.5Al-LDH/rGO also shows superior efficiency in the catalytic reduction of 4-NP solution with a high concentration (20 mM) and displays excellent reduction performance in the fixed-bed test, implying the potential applications of the current Co-doped hierarchical ternary Cu-based LDH/rGO hybrids in the continuous treatment of practical wastewater.
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Affiliation(s)
- Danyang Feng
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Zhuojun Wei
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Qinglin Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - An Feng
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Hui Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
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Mahaulpatha BH, Palliyaguru L, Jayawardene S, Shimomura M, Baltrusaitis J, Jayaweera PM. Catalytic reduction of 4-nitrophenol using CuO@Na 2Ti(PO 4) 2⋅H 2O. J Environ Sci Health A Tox Hazard Subst Environ Eng 2022; 57:65-79. [PMID: 35094655 DOI: 10.1080/10934529.2022.2031842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 12/13/2021] [Accepted: 12/15/2021] [Indexed: 06/14/2023]
Abstract
This article presents the synthesis, property characterization and catalytic application of CuO-supported disodium titanium phosphate, (CuO@Na2Ti(PO4)2⋅H2O) for the reduction of industrial pollutant 4-nitrophenol (4-NP). A simple hydrothermal route was developed to synthesize CuO@Na2Ti(PO4)2⋅H2O catalyst (CuO@Na2TiP) from beach sand ilmenite. The prepared CuO@Na2TiP was characterized using X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis, X-ray photoelectron spectroscopy, and nitrogen adsorption-desorption isotherms. The catalyst 12 wt.% CuO@Na2TiP showed the fastest reduction kinetics for 4-NP.
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Affiliation(s)
| | - Lalinda Palliyaguru
- Department of Chemistry, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
| | - Savidya Jayawardene
- Department of Engineering, Graduate School of Integrated Science and Technology, Shizuoka University, Hamamatsu, Shizuok, Japan
| | - Masaru Shimomura
- Department of Engineering, Graduate School of Integrated Science and Technology, Shizuoka University, Hamamatsu, Shizuok, Japan
| | - Jonas Baltrusaitis
- Department of Chemical and Biomolecular Engineering, Lehigh University, Pennsylvania, USA
| | - Pradeep M Jayaweera
- Department of Chemistry, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
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13
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Zhang X, Jin S, Zhang Y, Wang L, Liu Y, Duan Q. One-Pot Facile Synthesis of Noble Metal Nanoparticles Supported on rGO with Enhanced Catalytic Performance for 4-Nitrophenol Reduction. Molecules 2021; 26:molecules26237261. [PMID: 34885841 PMCID: PMC8659260 DOI: 10.3390/molecules26237261] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 11/22/2021] [Accepted: 11/23/2021] [Indexed: 11/16/2022] Open
Abstract
In this study, reduced graphene oxide (rGO)-supported noble metal (gold, silver, and platinum) nanoparticle catalysts were prepared via the one-pot facile co-reduction technique. Various measurement techniques were used to investigate the structures and properties of the catalysts. The relative intensity ratios of ID/IG in rGO/Au, rGO/Ag, rGO/Pt, and GO were 1.106, 1.078, 1.047, and 0.863, respectively. The results showed the formation of rGO and that noble metal nanoparticles were decorated on rGO. Furthermore, the catalytic activities of the designed nanocomposites were investigated via 4-nitrophenol. The catalysts were used in 4-nitrophenol reduction. The catalytic performance of the catalysts was evaluated using the apparent rate constant k values. The k value of rGO/Au was 0.618 min-1, which was higher than those of rGO/Ag (0.55 min-1) and rGO/Pt (0.038 min-1). The result proved that the rGO/Au catalyst exhibited a higher catalytic performance than the rGO/Ag catalyst and the rGO/Pt catalyst. The results provide a facile method for the synthesis of rGO-supported nanomaterials in catalysis.
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Affiliation(s)
- Xiaolong Zhang
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, China;
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China; (S.J.); (Y.Z.); (L.W.); (Y.L.)
| | - Shilei Jin
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China; (S.J.); (Y.Z.); (L.W.); (Y.L.)
| | - Yuhan Zhang
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China; (S.J.); (Y.Z.); (L.W.); (Y.L.)
| | - Liyuan Wang
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China; (S.J.); (Y.Z.); (L.W.); (Y.L.)
| | - Yang Liu
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China; (S.J.); (Y.Z.); (L.W.); (Y.L.)
| | - Qian Duan
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, China;
- Correspondence: ; Tel.: +86-43-85583015
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Abstract
Catalytic reduction of oximes represents a direct efficient approach to synthesize valuable hydroxylamine derivatives. However this transformation presents significant challenges: oximes are hard to reduce and, if reactive, reductive cleavage of the weak N−O bond often leads to primary amine side products. The first suitable systems involved the use of platinum‐based heterogeneous catalysts with hydrogen as reductant and stoichiometric amounts of a strong Brønsted acid. More recently metal‐free and transition‐metal‐based homogeneous catalysts have been developed, which display the highest turnovers (up to 4000). In the asymmetric variants, the E/Z‐geometry of the oxime double bond affects significantly the stereoselectivity, sometimes requiring extra synthetic efforts in substrate preparation. This minireview provides an overview of the advances and limitations in catalytic oxime to hydroxylamine reduction. Emphasis is put on highlighting and comparing the practical aspects of the existing methods, such as their reaction conditions and substrate scope. Additionally, future directions for improving this young research area are suggested.
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Affiliation(s)
- Josep Mas-Roselló
- Laboratory of Asymmetric Catalysis and Synthesis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Nicolai Cramer
- Laboratory of Asymmetric Catalysis and Synthesis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
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15
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Li N, Sun Q, Zhang P, Jing S. Hydrothermal Synthesis of 1T-MoS 2/Pelagic Clay Composite and Its Application in the Catalytic Reduction of 4-Nitrophenol. Materials (Basel) 2021; 14:7020. [PMID: 34832418 PMCID: PMC8625304 DOI: 10.3390/ma14227020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 11/16/2021] [Accepted: 11/16/2021] [Indexed: 11/22/2022]
Abstract
Pelagic clay is an emerging marine resource with strong hydrophilicity, fine particles and a large specific surface area. In this work, a 1T-MoS2/pelagic clay composite was fabricated by hydrothermal synthesis. In the composite, 1T-MoS2 nanosheets are evenly dispersed on the surface of the clay minerals, significantly reducing the agglomeration of MoS2. Compared with pure 1T-MoS2, the 1T-MoS2 nanosheets generated on the surface of pelagic clay have significantly smaller lateral dimensions and thicknesses. Moreover, the specific surface area is much larger than that of the pure 1T-MoS2 nanosheets fabricated by the same method, indicating that the active sites of the MoS2 sheets are fully exposed. In addition, the composite exhibited excellent hydrophilicity, leading to a high dispersibility in aqueous solutions. In this work, the composite was used as a catalyst in the reduction of 4-nitrophenol (4-NP), and the conversion of 4-NP reached up to 96.7%. This result shows that the 1T-MoS2/pelagic clay composite is a promising catalyst in a variety of reactions.
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Affiliation(s)
- Nan Li
- Key Laboratory of Automobile Materials of Ministry of Education, School of Material Science and Engineering, Jilin University, 5988 Renmin Street, Changchun 130022, China; (N.L.); (Q.S.); (P.Z.)
| | - Qiwei Sun
- Key Laboratory of Automobile Materials of Ministry of Education, School of Material Science and Engineering, Jilin University, 5988 Renmin Street, Changchun 130022, China; (N.L.); (Q.S.); (P.Z.)
| | - Peiping Zhang
- Key Laboratory of Automobile Materials of Ministry of Education, School of Material Science and Engineering, Jilin University, 5988 Renmin Street, Changchun 130022, China; (N.L.); (Q.S.); (P.Z.)
| | - Shubo Jing
- College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
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16
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Çalışkan M, Akay S, Kayan B, Baran T, Kalderis D. Preparation and Application of a Hydrochar-Based Palladium Nanocatalyst for the Reduction of Nitroarenes. Molecules 2021; 26:6859. [PMID: 34833951 PMCID: PMC8621521 DOI: 10.3390/molecules26226859] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 10/30/2021] [Accepted: 11/10/2021] [Indexed: 11/16/2022] Open
Abstract
In the present study, a novel heterogeneous catalyst was successfully fabricated through the decoration of palladium nanoparticles on the surface of designed Fe3O4-coffee waste composite (Pd-Fe3O4-CWH) for the catalytic reduction of nitroarenes. Various characterization techniques such as XRD, FE-SEM and EDS were used to establish its nano-sized chemical structure. It was determined that Pd-Fe3O4-CWH is a useful nanocatalyst, which can efficiently reduce various nitroarenes, including 4-nitrobenzoic acid (4-NBA), 4-nitroaniline (4-NA), 4-nitro-o-phenylenediamine (4-NPD), 2-nitroaniline (2-NA) and 3-nitroanisole (3-NAS), using NaBH4 in aqueous media and ambient conditions. Catalytic reactions were monitored with the help of high-performance liquid chromatography. Additionally, Pd-Fe3O4-CWH was proved to be a reusable catalyst by maintaining its catalytic activity through six successive runs. Moreover, the nanocatalyst displayed a superior catalytic performance compared to other catalysts by providing a shorter reaction time to complete the reduction in nitroarenes.
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Affiliation(s)
- Melike Çalışkan
- Department of Chemistry, Faculty of Science and Letters, Aksaray University, Aksaray 68100, Turkey; (M.Ç.); (S.A.); (B.K.); (T.B.)
| | - Sema Akay
- Department of Chemistry, Faculty of Science and Letters, Aksaray University, Aksaray 68100, Turkey; (M.Ç.); (S.A.); (B.K.); (T.B.)
| | - Berkant Kayan
- Department of Chemistry, Faculty of Science and Letters, Aksaray University, Aksaray 68100, Turkey; (M.Ç.); (S.A.); (B.K.); (T.B.)
| | - Talat Baran
- Department of Chemistry, Faculty of Science and Letters, Aksaray University, Aksaray 68100, Turkey; (M.Ç.); (S.A.); (B.K.); (T.B.)
| | - Dimitrios Kalderis
- Department of Electronic Engineering, Hellenic Mediterranean University, 73100 Chania, Greece
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García-Dalí S, Paredes JI, Villar-Rodil S, Martínez-Jódar A, Martínez-Alonso A, Tascón JMD. Molecular Functionalization of 2H-Phase MoS 2 Nanosheets via an Electrolytic Route for Enhanced Catalytic Performance. ACS Appl Mater Interfaces 2021; 13:33157-33171. [PMID: 34251180 PMCID: PMC8397248 DOI: 10.1021/acsami.1c08850] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 06/28/2021] [Indexed: 06/13/2023]
Abstract
The molecular functionalization of two-dimensional MoS2 is of practical relevance with a view to, for example, facilitating its liquid-phase processing or enhancing its performance in target applications. While derivatization of metallic 1T-phase MoS2 nanosheets has been relatively well studied, progress involving their thermodynamically stable, 2H-phase counterpart has been more limited due to the lower chemical reactivity of the latter. Here, we report a simple electrolytic strategy to functionalize 2H-phase MoS2 nanosheets with molecular groups derived from organoiodides. Upon cathodic treatment of a pre-expanded MoS2 crystal in an electrolyte containing the organoiodide, water-dispersible nanosheets derivatized with acetic acid or aniline moieties (∼0.10 molecular groups inserted per surface sulfur atom) were obtained. Analysis of the functionalization process indicated it to be enabled by the external supply of electrons from the cathodic potential, although they could also be sourced from a proper reducing agent, as well as by the presence of intrinsic defects in the 2H-phase MoS2 lattice (e.g., sulfur vacancies), where the molecular groups can bind. The acetic acid-functionalized nanosheets were tested as a non-noble metal-based catalyst for nitroarene and organic dye reduction, which is of practical utility in environmental remediation and chemical synthesis, and exhibited a markedly enhanced activity, surpassing that of other (1T- or 2H-phase) MoS2 materials and most non-noble metal catalysts previously reported for this application. The reduction kinetics (reaction order) was seen to correlate with the net electric charge of the nitroarene/dye molecules, which was ascribed to the distinct abilities of the latter to diffuse to the catalyst surface. The functionalized MoS2 catalyst also worked efficiently at realistic (i.e., high) reactant concentrations, as well as with binary and ternary mixtures of the reactants, and could be immobilized on a polymeric scaffold to expedite its manipulation and reuse.
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18
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Wang D, Fan M, He T, Zeng F, Hu X, Li C, Su Z. Cu/Cu x S-Embedded N,S-Doped Porous Carbon Derived in Situ from a MOF Designed for Efficient Catalysis. Chemistry 2021; 27:11468-11476. [PMID: 34002909 DOI: 10.1002/chem.202101560] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Indexed: 01/25/2023]
Abstract
The reasonable design of the precursor of a carbon-based nanocatalyst is an important pathway to improve catalytic performance. In this study, a simple solvothermal method was used to synthesize [Cu(TPT)(2,5-tdc)] ⋅ 2H2 O (Cu-MOF), which contains N and S atoms, in one step. Further in-situ carbonization of the Cu-MOF as the precursor was used to synthesize Cu/Cux S-embedded N,S-doped porous carbon (Cu/Cux S/NSC) composites. The catalytic activities of the prepared Cu/Cux S/NSC were investigated through catalytic reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP). The results show that the designed Cu/Cux S/NSC has exceptional catalytic activity and recycling stability, with a reaction rate constant of 0.0256 s-1 , and the conversion rate still exceeds 90 % after 15 cycles. Meanwhile, the efficient catalytic reduction of dyes (CR, MO, MB and RhB) confirmed its versatility. Finally, the active sites of the Cu/Cux S/NSC catalysts were analyzed, and a possible multicomponent synergistic catalytic mechanism was proposed.
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Affiliation(s)
- Dongsheng Wang
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun, 130022, P. R. China.,Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry, Changchun University of Science and Technology, Changchun, 130022, P. R. China
| | - Mingyue Fan
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun, 130022, P. R. China.,Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry, Changchun University of Science and Technology, Changchun, 130022, P. R. China
| | - Tingyu He
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun, 130022, P. R. China
| | - Fanming Zeng
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun, 130022, P. R. China.,Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry, Changchun University of Science and Technology, Changchun, 130022, P. R. China
| | - Xiaoli Hu
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun, 130022, P. R. China.,Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry, Changchun University of Science and Technology, Changchun, 130022, P. R. China
| | - Chun Li
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun, 130022, P. R. China
| | - Zhongmin Su
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun, 130022, P. R. China.,Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry, Changchun University of Science and Technology, Changchun, 130022, P. R. China.,Joint Sino-Russian Laboratory of Optical Materials and Chemistry, Changchun University of Science and Technology, Changchun, 130022, P. R. China
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Malik MA, Alshehri AA, Abomuti MA, Danish EY, Patel R. Bioengineered Matricaria recutita Extract-Assisted Palladium Nanoparticles for the Congo Red Dye Degradation and Catalytic Reduction of 4-Nitrophenol to 4-Aminophenol. Toxics 2021; 9:103. [PMID: 34064502 PMCID: PMC8148003 DOI: 10.3390/toxics9050103] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 04/25/2021] [Accepted: 04/27/2021] [Indexed: 11/19/2022]
Abstract
The green chemistry method is the preferred approach for synthesizing metal and metal oxide nanoparticles because of its low toxicity, environmental friendliness, feasibility, and safety to human health compared with other chemical or physical methods. The present work reports the phytogenic synthesis of palladium nanoparticles (PdNPs) using an aqueous extract of Matricaria recutita (Chamomile). The phytochemical-mediated synthesis of PdNPs is an economical and eco-friendly approach without using toxic elements as reducing and capping or stabilizing agents. The UV-visible spectroscopic characterization was initially used to confirm the preparation of PdNPs using an aqueous extract of M. recutita flowers as a bioreductant for the reduction of Pd2+ to Pd0 without using any extra capping and reducing agents. The appearance of surface plasmon resonance (SPR) peak at 286 nm confirmed the formation of M. recutita extract-based PdNPs. Furthermore, the PdNPs were characterized by TEM, SEM, EDX, XRD, XPS, and FTIR to confirm their proper synthesis. The thermogravimetric analysis (TGA) was implemented to interpret the decomposition pattern and thermal stability of as-synthesized PdNPs. The biosynthesized PdNPs were further applied as a nanocatalyst in degradation of an azo dye Congo red (CR) in the presence of NaBH4. The catalytic reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) was also investigated in the presence of NaBH4. All the catalytic reactions were performed in water, and no significant loss in catalytic activity was observed after recovery and reusability of the biosynthesized PdNPs.
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Affiliation(s)
- Maqsood Ahmad Malik
- Chemistry Department, Faculty of Sciences, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; (A.A.A.); (M.A.A.); (E.Y.D.)
| | - Abdulmohsen Ali Alshehri
- Chemistry Department, Faculty of Sciences, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; (A.A.A.); (M.A.A.); (E.Y.D.)
| | - May Abdullah Abomuti
- Chemistry Department, Faculty of Sciences, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; (A.A.A.); (M.A.A.); (E.Y.D.)
| | - Ekram Y. Danish
- Chemistry Department, Faculty of Sciences, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; (A.A.A.); (M.A.A.); (E.Y.D.)
| | - Rajan Patel
- Biophysical Chemistry Laboratory, Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi 110025, India;
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20
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Mannu R, Karthikeyan V, Veerappa MM, Roy VAL, Gopalan AI, Saianand G, Sonar P, Xu B, Lee KP, Kim WJ, Lee DE, Kannan V. Facile Use of Silver Nanoparticles-Loaded Alumina/Silica in Nanofluid Formulations for Enhanced Catalytic Performance toward 4-Nitrophenol Reduction. Int J Environ Res Public Health 2021; 18:2994. [PMID: 33803950 DOI: 10.3390/ijerph18062994] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 03/01/2021] [Accepted: 03/05/2021] [Indexed: 11/27/2022]
Abstract
The introduction of toxic chemicals into the environment can result in water pollution leading to the degradation of biodiversity as well as human health. This study presents a new approach of using metal oxides (Al2O3 and SiO2) modified with a plasmonic metal (silver, Ag) nanoparticles (NPs)-based nanofluid (NF) formulation for environmental remediation purposes. Firstly, we prepared the Al2O3 and SiO2 NFs of different concentrations (0.2 to 2.0 weight %) by ultrasonic-assisted dispersion of Al2O3 and SiO2 NPs with water as the base fluid. The thermo-physical (viscosity, activation energy, and thermal conductivity), electrical (AC conductivity and dielectric constant) and physical (ultrasonic velocity, density, refractive index) and stability characteristics were comparatively evaluated. The Al2O3 and SiO2 NPs were then catalytically activated by loading silver NPs to obtain Al2O3/SiO2@Ag composite NPs. The catalytic reduction of 4-nitrophenol (4-NP) with Al2O3/SiO2@Ag based NFs was followed. The catalytic efficiency of Al2O3@Ag NF and SiO2@Ag NF, for the 4-NP catalysis, is compared. Based on the catalytic rate constant evaluation, the catalytic reduction efficiency for 4-NP is found to be superior for 2% weight Al2O3@Ag NF (92.9 × 10−3 s−1) as compared to the SiO2@Ag NF (29.3 × 10−3 s−1). Importantly, the enhanced catalytic efficiency of 2% weight Al2O3@Ag NF for 4-NP removal is much higher than other metal NPs based catalysts reported in the literature, signifying the importance of NF formulation-based catalysis.
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21
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Wang N, Wang F, Pan F, Yu S, Pan D. Highly Efficient Silver Catalyst Supported by a Spherical Covalent Organic Framework for the Continuous Reduction of 4-Nitrophenol. ACS Appl Mater Interfaces 2021; 13:3209-3220. [PMID: 33404207 DOI: 10.1021/acsami.0c20444] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Developing new materials and novel technologies for the highly efficient treatment of toxic organic pollutants is highly desirable. Chemical reduction based on heterogeneous substrate/noble metal catalysts and the reducing agent NaBH4 has become an effective method in recent years. Here, a spherical covalent organic framework (SCOF) was designed to provide basic sites for Ag ions, by which small Ag NPs were immobilized on the SCOF to form Ag NPs@SCOF microspheres. The prepared microspheres exhibited a high catalytic reduction ability toward 4-nitrophenol (4-NP). An optimized permeation flux of 2000 L m-2 h-1 (LMH) and a more than 99% 4-NP reduction efficiency were obtained with flow-through experiments, which are far better than the reported results (below 200 LMH). Moreover, the microspheres could maintain stable catalytic performance under a continuous flow-through process. Our work provides an efficient material and technology that can be applied to easily treat toxic organic pollutants.
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Affiliation(s)
- Ning Wang
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Research Center for Coastal Environmental Engineering and Technology of Shandong Province, Shandong Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, Shandong 264003, P. R. China
- Center for Ocean Mega-Science, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P.R. China
| | - Fushuai Wang
- Yantai University, Yantai, Shandong 264005, P. R. China
| | - Fei Pan
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Research Center for Coastal Environmental Engineering and Technology of Shandong Province, Shandong Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, Shandong 264003, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P.R. China
| | - Shunyang Yu
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Research Center for Coastal Environmental Engineering and Technology of Shandong Province, Shandong Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, Shandong 264003, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P.R. China
| | - Dawei Pan
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Research Center for Coastal Environmental Engineering and Technology of Shandong Province, Shandong Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, Shandong 264003, P. R. China
- Center for Ocean Mega-Science, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P.R. China
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22
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Liu T, Sun Y, Jiang B, Guo W, Qin W, Xie Y, Zhao B, Zhao L, Liang Z, Jiang L. Pd Nanoparticle-Decorated 3D-Printed Hierarchically Porous TiO 2 Scaffolds for the Efficient Reduction of a Highly Concentrated 4-Nitrophenol Solution. ACS Appl Mater Interfaces 2020; 12:28100-28109. [PMID: 32469496 DOI: 10.1021/acsami.0c03959] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The large amount of 4-nitrophenol (4-NP) wastewater produced by the chemical industry has received increased concern over the growing risk of environmental pollution. The ability to catalyze the reduction of highly concentrated 4-NP wastewater is highly desirable for the practical treatment of industrial wastewater, yet it remains a significant challenge. Herein, we report Pd nanoparticle-decorated 3D-printed hierarchically porous TiO2 scaffolds (Pd/TiO2 scaffolds) for the efficient reduction of highly concentrated 4-NP wastewater (2 g·L-1, ∼14.38 mM). The millimeter-sized interconnected channels in the scaffolds are conducive to rapid mass and ion transportation; meanwhile, the abundant micrometer- and nanometer-sized pores on the surface of the scaffolds offer adequate anchoring sites for Pd nanoparticles. The turnover frequency of the hierarchically porous Pd/TiO2 scaffold (16 layers) is up to 2.69 min-1, which is 1063 times higher than that of the Pd/TiO2-bulk material with the same size (0.00253 min-1). Importantly, no obvious deactivation of the catalytic activity is observed even after 20 cycles of catalytic reduction of 4-NP, showing excellent catalytic stability and reusability. Our strategy of loading the nanostructured catalyst on 3D-printable hierarchically porous structures put forward a flexible and versatile approach for boosting the catalytic performance of the catalysts, including catalytic activity, stability, and reusability, which can help promote their practical application in industry.
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Affiliation(s)
- Ting Liu
- Institute of Functional Nano & Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, Jiangsu, P. R. China
| | - Yinghui Sun
- College of Energy, Soochow Institute for Energy and Materials InnovationS, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou 215006, Jiangsu, P. R. China
| | - Bo Jiang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, Jiangsu, P. R. China
| | - Wei Guo
- Institute of Functional Nano & Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, Jiangsu, P. R. China
| | - Wei Qin
- Institute of Functional Nano & Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, Jiangsu, P. R. China
| | - Yiming Xie
- Institute of Functional Nano & Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, Jiangsu, P. R. China
| | - Bo Zhao
- Institute of Functional Nano & Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, Jiangsu, P. R. China
| | - Liang Zhao
- College of Energy, Soochow Institute for Energy and Materials InnovationS, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou 215006, Jiangsu, P. R. China
| | - Zhiqiang Liang
- Institute of Functional Nano & Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, Jiangsu, P. R. China
| | - Lin Jiang
- Institute of Functional Nano & Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, Jiangsu, P. R. China
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23
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Oh S, Lee S, Oh M. Zeolitic Imidazolate Framework-Based Composite Incorporated with Well-Dispersed CoNi Nanoparticles for Efficient Catalytic Reduction Reaction. ACS Appl Mater Interfaces 2020; 12:18625-18633. [PMID: 32237723 DOI: 10.1021/acsami.0c03756] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Incorporation of metal nanocatalysts within a well-defined porous support is of great importance for stabilizing unstable metal nanocatalysts, so that they display an effective and long-lasting catalytic activity. In particular, metal-organic frameworks (MOFs) with a wide range of structures serve as excellent porous supports for stabilizing unstable nanocatalysts. In addition, the development of inexpensive metal nanocatalysts is necessary to replace expensive noble metal nanocatalysts. Herein, we report on a simple method for the preparation of porous MOF-based or carbon-based composites incorporated with catalytically active CoNi alloy nanoparticles. CoNi alloy nanoparticles were produced from the concurrent reduction of Co and Ni ions existing within a zeolitic imidazolate framework (ZIF)-based precursor material during the thermal treatment. In particular, a part of the highly porous ZIF was preserved during the thermal treatment at 400 °C, which eventually resulted in a composite of ZIF and CoNi (CoNi@ZIF). The resulting CoNi@ZIF showed excellent catalytic activity for the reduction of 4-nitrophenol to 4-aminophenol. The synergy between the highly porous ZIF support and the well-dispersed CoNi nanoparticles within CoNi@ZIF provided an outstanding catalytic performance, even with inexpensive transition-metal nanocatalysts. Moreover, the catalytic activity of CoNi@ZIF was well conserved even after five consecutive reactions.
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Affiliation(s)
- Sojin Oh
- Department of Chemistry, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea
| | - Sujeong Lee
- Department of Chemistry, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea
| | - Moonhyun Oh
- Department of Chemistry, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea
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24
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Shultz LR, McCullough B, Newsome WJ, Ali H, Shaw TE, Davis KO, Uribe-Romo FJ, Baudelet M, Jurca T. A Combined Mechanochemical and Calcination Route to Mixed Cobalt Oxides for the Selective Catalytic Reduction of Nitrophenols. Molecules 2019; 25:E89. [PMID: 31881734 PMCID: PMC6982874 DOI: 10.3390/molecules25010089] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 12/14/2019] [Accepted: 12/15/2019] [Indexed: 12/28/2022] Open
Abstract
Para-, or 4-nitrophenol, and related nitroaromatics are broadly used compounds in industrial processes and as a result are among the most common anthropogenic pollutants in aqueous industrial effluent; this requires development of practical remediation strategies. Their catalytic reduction to the less toxic and synthetically desirable aminophenols is one strategy. However, to date, the majority of work focuses on catalysts based on precisely tailored, and often noble metal-based nanoparticles. The cost of such systems hampers practical, larger scale application. We report a facile route to bulk cobalt oxide-based materials, via a combined mechanochemical and calcination approach. Vibratory ball milling of CoCl2(H2O)6 with KOH, and subsequent calcination afforded three cobalt oxide-based materials with different combinations of CoO(OH), Co(OH)2, and Co3O4 with different crystallite domains/sizes and surface areas; Co@100, Co@350 and Co@600 (Co@###; # = calcination temp). All three prove active for the catalytic reduction of 4-nitrophenol and related aminonitrophenols. In the case of 4-nitrophenol, Co@350 proved to be the most active catalyst, therein its retention of activity over prolonged exposure to air, moisture, and reducing environments, and applicability in flow processes is demonstrated.
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Affiliation(s)
- Lorianne R. Shultz
- Department of Chemistry, University of Central Florida, 4111 Libra Drive, Orlando, FL 32816, USA; (L.R.S.); (B.M.); (W.J.N.); (T.E.S.)
- Renewable Energy and Chemical Transformations Cluster, University of Central Florida, 4353 Scorpius Street, Orlando, FL 32816, USA
| | - Bryan McCullough
- Department of Chemistry, University of Central Florida, 4111 Libra Drive, Orlando, FL 32816, USA; (L.R.S.); (B.M.); (W.J.N.); (T.E.S.)
- National Center for Forensic Science, University of Central Florida, 12354 Research Parkway #225, Orlando, FL 32826, USA
| | - Wesley J. Newsome
- Department of Chemistry, University of Central Florida, 4111 Libra Drive, Orlando, FL 32816, USA; (L.R.S.); (B.M.); (W.J.N.); (T.E.S.)
| | - Haider Ali
- Department of Materials Science and Engineering, University of Central Florida, Orlando, FL 32816, USA; (H.A.); (K.O.D.)
| | - Thomas E. Shaw
- Department of Chemistry, University of Central Florida, 4111 Libra Drive, Orlando, FL 32816, USA; (L.R.S.); (B.M.); (W.J.N.); (T.E.S.)
- Renewable Energy and Chemical Transformations Cluster, University of Central Florida, 4353 Scorpius Street, Orlando, FL 32816, USA
| | - Kristopher O. Davis
- Department of Materials Science and Engineering, University of Central Florida, Orlando, FL 32816, USA; (H.A.); (K.O.D.)
- CREOL—The College of Optics & Photonics, Building 53, University of Central Florida, 4304 Scorpius Street, Orlando, FL 32816, USA
| | - Fernando J. Uribe-Romo
- Department of Chemistry, University of Central Florida, 4111 Libra Drive, Orlando, FL 32816, USA; (L.R.S.); (B.M.); (W.J.N.); (T.E.S.)
- Renewable Energy and Chemical Transformations Cluster, University of Central Florida, 4353 Scorpius Street, Orlando, FL 32816, USA
| | - Matthieu Baudelet
- Department of Chemistry, University of Central Florida, 4111 Libra Drive, Orlando, FL 32816, USA; (L.R.S.); (B.M.); (W.J.N.); (T.E.S.)
- National Center for Forensic Science, University of Central Florida, 12354 Research Parkway #225, Orlando, FL 32826, USA
- CREOL—The College of Optics & Photonics, Building 53, University of Central Florida, 4304 Scorpius Street, Orlando, FL 32816, USA
| | - Titel Jurca
- Department of Chemistry, University of Central Florida, 4111 Libra Drive, Orlando, FL 32816, USA; (L.R.S.); (B.M.); (W.J.N.); (T.E.S.)
- Renewable Energy and Chemical Transformations Cluster, University of Central Florida, 4353 Scorpius Street, Orlando, FL 32816, USA
- NanoScience Technology Center, University of Central Florida, Orlando, FL 32826, USA
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25
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Wu T, Kou Y, Zheng H, Lu J, Kadasala NR, Yang S, Guo C, Liu Y, Gao M. A Novel Au@Cu 2O-Ag Ternary Nanocomposite with Highly Efficient Catalytic Performance: Towards Rapid Reduction of Methyl Orange Under Dark Condition. Nanomaterials (Basel) 2019; 10:E48. [PMID: 31878173 PMCID: PMC7023264 DOI: 10.3390/nano10010048] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 12/12/2019] [Accepted: 12/20/2019] [Indexed: 11/16/2022]
Abstract
Au@Cu2O core-shell nanocomposites (NCs) were synthesized by reducing copper nitrate on Au colloids with hydrazine. The thickness of the Cu2O shells could be varied by adjusting the molar ratios of Au: Cu. The results showed that the thickness of Cu2O shells played a crucial role in the catalytic activity of Au@Cu2O NCs under dark condition. The Au@Cu2O-Ag ternary NCs were further prepared by a simple galvanic replacement reaction method. Moreover, the surface features were revealed by TEM, XRD, XPS, and UV-Vis techniques. Compared with Au@Cu2O NCs, the ternary Au@Cu2O-Ag NCs had an excellent catalytic performance. The degradation of methyl orange (MO) catalyzed by Au@Cu2O-Ag NCs was achieved within 4 min. The mechanism study proved that the synergistic effects of Au@Cu2O-Ag NCs and sodium borohydride facilitated the degradation of MO. Hence, the designed Au@Cu2O-Ag NCs with high catalytic efficiency and good stability are expected to be the ideal environmental nanocatalysts for the degradation of dye pollutants in wastewater.
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Affiliation(s)
- Tong Wu
- College of Physics, Jilin Normal University, Siping 136000, China; (T.W.); (Y.K.); (H.Z.); (J.L.)
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China
| | - Yichuan Kou
- College of Physics, Jilin Normal University, Siping 136000, China; (T.W.); (Y.K.); (H.Z.); (J.L.)
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China
| | - Hui Zheng
- College of Physics, Jilin Normal University, Siping 136000, China; (T.W.); (Y.K.); (H.Z.); (J.L.)
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China
| | - Jianing Lu
- College of Physics, Jilin Normal University, Siping 136000, China; (T.W.); (Y.K.); (H.Z.); (J.L.)
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China
| | | | - Shuo Yang
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China; (S.Y.); (C.G.)
| | - Chenzi Guo
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China; (S.Y.); (C.G.)
| | - Yang Liu
- College of Physics, Jilin Normal University, Siping 136000, China; (T.W.); (Y.K.); (H.Z.); (J.L.)
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China
| | - Ming Gao
- College of Physics, Jilin Normal University, Siping 136000, China; (T.W.); (Y.K.); (H.Z.); (J.L.)
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China
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26
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Silvestri D, Wacławek S, K. Ramakrishnan R, Venkateshaiah A, Krawczyk K, Padil VVT, Sobel B, Černík M. The Use of a Biopolymer Conjugate for an Eco-Friendly One-Pot Synthesis of Palladium-Platinum Alloys. Polymers (Basel) 2019; 11:polym11121948. [PMID: 31783572 PMCID: PMC6960498 DOI: 10.3390/polym11121948] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 11/23/2019] [Accepted: 11/25/2019] [Indexed: 11/23/2022] Open
Abstract
Raising health and environmental concerns over the nanoparticles synthesized from hazardous chemicals have urged researchers to focus on safer, environmentally friendlier and cheaper alternatives as well as prompted the development of green synthesis. Apart from many advantages, green synthesis is often not selective enough (among other issues) to create shape-specific nanoparticle structures. Herein, we have used a biopolymer conjugate and Pd and Pt precursors to prepare sustainable bimetallic nanoparticles with various morphology types. The nanoparticles were synthesized by a novel green approach using a bio-conjugate of chitosan and polyhydroxybutyrate (Cs-PHB). The bio-conjugate plays the simultaneous roles of a reducing and a capping agent, which was confirmed by attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) and energy dispersive X-ray spectrometry (EDS) analysis, proving the presence of a Cs-PHB layer on the surface of the prepared nanoparticles. The EDS profile also revealed the elemental structure of these nanoparticles and confirmed the formation of a Pd/Pt alloy. TEM morphological analysis showed the formation of star-like, octahedron or decahedron Pd/Pt nanoparticles, depending on the synthesis conditions. The bimetallic Pd/Pt nanoparticles synthesized with various Pd/Pt molar ratios were successfully applied for the catalytic reduction of 4-nitrophenol to 4-aminophenol by borohydride. The calculated κc values (ratio of kapp to the concentration of the catalyst) revealed that the decahedron nanoparticles (size of 15 ± 4 nm), synthesized at the molar ratio of 2:1 (Pd/Pt), temperature of 130 °C, 10 g/L of Cs-PHB conjugate and time of 30 min, exhibited excellent catalytic activity compared to other bimetallic nanoparticles reported in the literature.
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Affiliation(s)
- Daniele Silvestri
- Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, 46117 Liberec, Czech Republic; (D.S.); (R.K.R.); (A.V.); (K.K.); (V.V.T.P.)
| | - Stanisław Wacławek
- Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, 46117 Liberec, Czech Republic; (D.S.); (R.K.R.); (A.V.); (K.K.); (V.V.T.P.)
- Correspondence: (S.W.); (M.Č.)
| | - Rohith K. Ramakrishnan
- Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, 46117 Liberec, Czech Republic; (D.S.); (R.K.R.); (A.V.); (K.K.); (V.V.T.P.)
| | - Abhilash Venkateshaiah
- Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, 46117 Liberec, Czech Republic; (D.S.); (R.K.R.); (A.V.); (K.K.); (V.V.T.P.)
| | - Kamil Krawczyk
- Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, 46117 Liberec, Czech Republic; (D.S.); (R.K.R.); (A.V.); (K.K.); (V.V.T.P.)
| | - Vinod V. T. Padil
- Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, 46117 Liberec, Czech Republic; (D.S.); (R.K.R.); (A.V.); (K.K.); (V.V.T.P.)
| | - Bartłomiej Sobel
- Institute of Engineering Materials and Biomaterials, Faculty of Mechanical Engineering, Silesian University of Technology, 44–100 Gliwice, Poland;
| | - Miroslav Černík
- Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, 46117 Liberec, Czech Republic; (D.S.); (R.K.R.); (A.V.); (K.K.); (V.V.T.P.)
- Correspondence: (S.W.); (M.Č.)
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27
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Li J, Li M, Yang X, Wang S, Zhang Y, Liu F, Liu X. Sub-nanocatalysis for Efficient Aqueous Nitrate Reduction: Effect of Strong Metal-Support Interaction. ACS Appl Mater Interfaces 2019; 11:33859-33867. [PMID: 31487151 DOI: 10.1021/acsami.9b09544] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Magnetic ferroferric oxide-supported bimetallic Pd-In cluster sub-nanoparticles were used for the first time for the catalytic reduction of nitrates. Due to the unique properties of the FeOx support, the PdIn active centers could be highly dispersed in both nano- and sub-nanoscales. A variety of characterizations and the charge density difference model confirm that a strong metal-support interaction exists between the active sites and the support. The PdIn nanoparticles on FeOx show high selectivity toward nitrogen and excellent cyclic activity due to ferromagnetism, which broaden its prospect in practical water treatment. Moreover, the active centers in the sub-nanoscale are used in the nitrate reduction process for the first time and they show a distinct higher activity in denitration. The rate constant for nitrate conversion on PdIn sub-nanoparticles is larger than that for its nanometer counterpart based on the Langmuir-Hinshelwood model. High turnover frequency value and ammonia selectivity are achieved for the small-sized sub-nanocatalyst. The FeOx-supported PdIn nanoparticles and sub-nanoparticles have two application areas in water purification and ammonia recovery, respectively. Density functional theory calculations on the adsorption energies of elemental reactions are also performed, which shed some light on the catalysis mechanism and catalyst design.
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Affiliation(s)
- Jiacheng Li
- School of Environment , Tsinghua University , Beijing 100084 , China
| | - Miao Li
- School of Environment , Tsinghua University , Beijing 100084 , China
| | - Xu Yang
- School of Environment , Tsinghua University , Beijing 100084 , China
| | - Sai Wang
- School of Environment , Tsinghua University , Beijing 100084 , China
| | - Yu Zhang
- School of Environment , Tsinghua University , Beijing 100084 , China
| | - Fang Liu
- School of Environment , Tsinghua University , Beijing 100084 , China
| | - Xiang Liu
- School of Environment , Tsinghua University , Beijing 100084 , China
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28
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Coaviche-Yoval A, Andrade-Jorge E, Pérez-González C, Luna H, Tovar-Miranda R, Trujillo-Ferrara JG. Quantum Reality in the Selective Reduction of a Benzofuran System. Molecules 2019; 24:molecules24112061. [PMID: 31151186 PMCID: PMC6600454 DOI: 10.3390/molecules24112061] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 05/27/2019] [Indexed: 11/16/2022]
Abstract
Two 2,3-disubstituted benzofurans (1 and 2), analogs of gamma-aminobutyric acid (GABA), were synthesized to obtain their 2,3-dihydro derivatives from the Pd/C-driven catalytic reduction of the double bond in the furanoid ring. The synthesis produced surprising by-products. Therefore, theoretical calculations of global and local reactivity were performed based on Pearson's hard and soft acids and bases (HSAB) principle to understand the regioselectivity that occurred in the reduction of the olefinic carbons of the compounds. Local electrophilicity (ωk) was the most useful parameter for explaining the selectivity of the polar reactions. This local parameter was defined with the condensed Fukui function and redefined with the electrophilic (Pk+) Parr function. The similar patterns of both resulting sets of values helped to demonstrate the electrophilic behavior (soft acid) of the olefinic carbons in these compounds. The theoretical calculations, nuclear magnetic resonance, and resonance hybrids showed the moieties in each compound that are most susceptible to reduction.
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Affiliation(s)
- Arturo Coaviche-Yoval
- Doctorado en Ciencias Biológicas y de la Salud, Universidad Autónoma Metropolitana-Unidad Xochimilco, Mexico City 04960, Mexico.
| | - Erik Andrade-Jorge
- Departamento de Bioquímica, Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Mexico City 11340, Mexico.
- Unidad de Investigación en Biomedicina, Facultad de Estudios Superiores-Iztacala, Universidad Nacional Autónoma de México. Av. de los Barrios 1, Los Reyes Iztacala, Tlalnepantla 54090, Estado de México, Mexico.
| | - Cuauhtémoc Pérez-González
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana-Unidad Xochimilco, Mexico City 04960, Mexico.
| | - Héctor Luna
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana-Unidad Xochimilco, Mexico City 04960, Mexico.
| | - Ricardo Tovar-Miranda
- Instituto de Ciencias Básicas, Universidad Veracruzana, Xalapa 91190, Veracruz, Mexico.
| | - José G Trujillo-Ferrara
- Departamento de Bioquímica, Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Mexico City 11340, Mexico.
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Lu H, Zhang L, Ma J, Alam N, Zhou X, Ni Y. Nano-Cellulose/MOF Derived Carbon Doped CuO/Fe₃O₄ Nanocomposite as High Efficient Catalyst for Organic Pollutant Remedy. Nanomaterials (Basel) 2019; 9:E277. [PMID: 30781506 DOI: 10.3390/nano9020277] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Revised: 02/07/2019] [Accepted: 02/11/2019] [Indexed: 02/06/2023]
Abstract
Metal–organic framework (MOF)-based derivatives are attracting increased interest in various research fields. In this study, nano-cellulose MOF-derived carbon-doped CuO/Fe3O4 nanocomposites were successfully synthesized via direct calcination of magnetic Cu-BTC MOF (HKUST-1)/Fe3O4/cellulose microfibril (CMF) composites in air. The morphology, structure, and porous properties of carbon-doped CuO/Fe3O4 nanocomposites were characterized using SEM, TEM, powder X-ray diffraction (PXRD), X-ray photoelectron spectroscopy (XPS), and vibrating sample magnetometry (VSM). The results show that the as-prepared nanocomposite catalyst is composed of Fe3O4, CuO, and carbon. Compared to the CuO/Fe3O4 catalyst from HKUST-1/Fe3O4 composite and CuO from HKUST-1, this carbon-doped CuO/Fe3O4 nanocomposite catalyst shows better catalytic efficiency in reduction reactions of 4-nitrophenol (4-NP), methylene blue (MB), and methyl orange (MO) in the presence of NaBH4. The enhanced catalytic performance of carbon-doped CuO/Fe3O4 is attributed to effects of carbon preventing the aggregation of CuO/Fe3O4 and providing high surface-to-volume ratio and chemical stability. Moreover, this nanocomposite catalyst is readily recoverable using an external magnet due to its superparamagnetic behavior. The recyclability/reuse of carbon-doped CuO/Fe3O4 was also investigated.
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30
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Silva CG, Pereira MFR, Órfão JJM, Faria JL, Soares OSGP. Catalytic and Photocatalytic Nitrate Reduction Over Pd-Cu Loaded Over Hybrid Materials of Multi-Walled Carbon Nanotubes and TiO 2. Front Chem 2018; 6:632. [PMID: 30619836 PMCID: PMC6306434 DOI: 10.3389/fchem.2018.00632] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 12/05/2018] [Indexed: 11/29/2022] Open
Abstract
TiO2 and carbon nanotube-TiO2 hybrid materials synthesized by sol-gel and loaded with 1%Pd-1%Cu (%wt.) were tested in the catalytic and photocatalytic reduction of nitrate in water in the presence of CO2 (buffer) and H2 (reducing agent). Characterization of the catalysts was performed by UV-Vis and fluorescence spectroscopy, X-ray diffraction, temperature programed reduction, N2 adsorption, and electron microscopy. The presence of light produced a positive effect in the kinetics of nitrate removal. Higher selectivity toward nitrogen formation was observed under dark condition, while the photo-activated reactions showed higher selectivity for the production of ammonium. The hybrid catalyst containing 20 %wt. of carbon nanotubes shows the best compromise between activity and selectivity. A mechanism for the photocatalytic abatement of nitrate in water in the presence of the hybrid materials was proposed, based in the action of carbon nanotubes as light harvesters, dispersing media for TiO2 particles and as charge carrier facilitators.
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Affiliation(s)
- Cláudia G. Silva
- Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia, Universidade do Porto, Porto, Portugal
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31
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Zhang H, Hu X. Biosynthesis of au nanoparticles by a marine bacterium and enhancing their catalytic activity through metal ions and metal oxides. Biotechnol Prog 2018; 35:e2727. [PMID: 30298992 DOI: 10.1002/btpr.2727] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Revised: 09/27/2018] [Accepted: 09/27/2018] [Indexed: 01/22/2023]
Abstract
The authors report that a marine Shewanella sp. CNZ-1 is capable of producing Au NPs under various conditions. Results showed that initial concentration of Au(III), pH values and electron donors affected nucleation of Au NPs by CNZ-1, resulting in different apparent color of the as-obtained bio-Au NPs, which were further characterized by UV-Vis, TEM, XRD, and XPS analyses. Mechanism studies revealed that Au(III) was first reduced to Au(I) and eventually reduced to EPS-coated Au0 NPs. FTIR and FEEM analyses revealed that some amides and humic acid-like matters were involved in the production of bio-Au NPs through CNZ-1 cells. In addition, the authors also found that the catalytic activity of bio-Au NPs for 4-nitrophenol (4-NP) reduction could be enhanced by various metal ions (Ca2+ , Cu2+ , Co2+ , Fe2+ , Fe3+ , Ni2+ , Sr2+ , and Cr3+ ) and metal oxides (Fe3 O4 , Al2 O3 , and SiO2 ), which is beneficial for their further practical application. The maximum zero-order rate constant k 1 and first-order rate constant k2 of all metal ions/oxides supplemented systems can reach 99.65 mg/(L. min) and 2.419 min-1 , which are 11.3- and 12.6-fold higher than that of control systems, respectively. © 2018 American Institute of Chemical Engineers Biotechnol. Prog., 35: e2727, 2019.
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Affiliation(s)
- Haikun Zhang
- Yantai Institute of Costal Zone Research, Chinese Academy of Sciences, Yantai, 264000, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Xiaoke Hu
- Yantai Institute of Costal Zone Research, Chinese Academy of Sciences, Yantai, 264000, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
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Liu W, Zhu X, Xu C, Dai Z, Meng Z. AuNPs-Based Thermoresponsive Nanoreactor as an Efficient Catalyst for the Reduction of 4-Nitrophenol. Nanomaterials (Basel) 2018; 8:E963. [PMID: 30469465 DOI: 10.3390/nano8120963] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 11/11/2018] [Accepted: 11/16/2018] [Indexed: 11/17/2022]
Abstract
A new AuNPs-based thermosensitive nanoreactor (SiO₂@PMBA@Au@PNIPAM) was designed and prepared by stabilizing AuNPs in the layer of poly(N,N'-methylenebisacrylamide) (PMBA) and subsequent wrapping with the temperature-sensitive poly(N-isopropylacrylamide) (PNIPAM) layer. The new nanoreactor exhibited high dispersibility and stability in aqueous solution and effectively prevented the aggregation of AuNPs caused by the phase transformation of PNIPAM. The XPS and ATR-FTIR results indicated that AuNPs could be well stabilized by PMBA due to the electron transfer between the N atoms of amide groups in the PMBA and Au atoms of AuNPs. The catalytic activity and thermoresponsive property of the new nanoreactor were invested by the reduction of the environmental pollutant, 4-nitrophenol (4-NP), with NaBH₄ as a reductant. It exhibited a higher catalytic activity at 20 °C and 30 °C (below LCST of PNIPAM), but an inhibited catalytic activity at 40 °C (above LCST of PNIPAM). The PNIPAM layer played a switching role in controlling the catalytic rate by altering the reaction temperature. In addition, this nanoreactor showed an easily recyclable property due to the existence of a silica core and also preserved a rather high catalytic efficiency after 16 times of recycling.
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Yang PC, Wu T, Lin YW. Label-Free Colorimetric Detection of Mercury (II) Ions Based on Gold Nanocatalysis. Sensors (Basel) 2018; 18:E2807. [PMID: 30149653 PMCID: PMC6163656 DOI: 10.3390/s18092807] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2018] [Revised: 08/17/2018] [Accepted: 08/22/2018] [Indexed: 12/01/2022]
Abstract
Herein, a label-free colorimetric nanosensor for Hg(II) is developed utilizing the hindering effect of Hg(II) on the kinetic aspect of gold nanoparticle (AuNPs) growth on the surface of gold nanostars (AuNSs). H-AuNS probes are synthesized and modified by 2-[4-(2-hydroxyethel) piperazine-1-yl] ethanesulfonic acid (HEPES). After the formulation of the reagents and testing conditions are optimized, HEPES-capped AuNSs (H-AuNSs) demonstrates good selectivity and sensitivity towards Hg(II) determination. A H-AuNS probe, in the presence of HCl/Au(III)/H₂O₂, is capable of detecting a Hg(II) concentration range of 1.0 nM⁻100 µM, with a detection limit of 0.7 nM, at a signal-to-noise ratio of 3.0, and a visual detection limit of 10 nM with naked eyes. For practicality, the H-AuNS probe is evaluated by measuring Hg(II) in the environmental water matrices (lake water and seawater) by a standard addition and recovery study. The detection limits for environmental samples are found to be higher than the lab samples, but they are still within the maximum allowable Hg concentration in drinking water (10 nM) set by the US Environmental Protection Agency (EPA). To create a unique nanosensor, the competitive interaction between Hg(II) and Pt(IV) toward the H-AuNSs probe is developed into a logic gate, improving the specificity in the detection of Hg(II) ions in water samples.
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Affiliation(s)
- Pei-Chia Yang
- Department of Chemistry, National Changhua University of Education, 1, Jin-De Road, Changhua City 50007, Taiwan.
| | - Tsunghsueh Wu
- Department of Chemistry, University of Wisconsin-Platteville, 1 University Plaza, Platteville, WI 53818-3099, USA.
| | - Yang-Wei Lin
- Department of Chemistry, National Changhua University of Education, 1, Jin-De Road, Changhua City 50007, Taiwan.
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Chen Y, Zhang Y, Kou Q, Liu Y, Han D, Wang D, Sun Y, Zhang Y, Wang Y, Lu Z, Chen L, Yang J, Xing SG. Enhanced Catalytic Reduction of 4-Nitrophenol Driven by Fe₃O₄-Au Magnetic Nanocomposite Interface Engineering: From Facile Preparation to Recyclable Application. Nanomaterials (Basel) 2018; 8:E353. [PMID: 29789457 PMCID: PMC5977367 DOI: 10.3390/nano8050353] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 05/18/2018] [Accepted: 05/18/2018] [Indexed: 01/22/2023]
Abstract
In this work, we report the enhanced catalytic reduction of 4-nitrophenol driven by Fe₃O₄-Au magnetic nanocomposite interface engineering. A facile solvothermal method is employed for Fe₃O₄ hollow microspheres and Fe₃O₄-Au magnetic nanocomposite synthesis via a seed deposition process. Complementary structural, chemical composition and valence state studies validate that the as-obtained samples are formed in a pure magnetite phase. A series of characterizations including conventional scanning/transmission electron microscopy (SEM/TEM), Mössbauer spectroscopy, magnetic testing and elemental mapping is conducted to unveil the structural and physical characteristics of the developed Fe₃O₄-Au magnetic nanocomposites. By adjusting the quantity of Au seeds coating on the polyethyleneimine-dithiocarbamates (PEI-DTC)-modified surfaces of Fe₃O₄ hollow microspheres, the correlation between the amount of Au seeds and the catalytic ability of Fe₃O₄-Au magnetic nanocomposites for 4-nitrophenol (4-NP) is investigated systematically. Importantly, bearing remarkable recyclable features, our developed Fe₃O₄-Au magnetic nanocomposites can be readily separated with a magnet. Such Fe₃O₄-Au magnetic nanocomposites shine the light on highly efficient catalysts for 4-NP reduction at the mass production level.
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Affiliation(s)
- Yue Chen
- College of Physics, Jilin Normal University, Siping 136000, China.
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China.
| | - Yuanyuan Zhang
- College of Physics, Jilin Normal University, Siping 136000, China.
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China.
| | - Qiangwei Kou
- College of Physics, Jilin Normal University, Siping 136000, China.
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China.
| | - Yang Liu
- College of Physics, Jilin Normal University, Siping 136000, China.
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China.
| | - Donglai Han
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, China.
| | - Dandan Wang
- Technology Development Department, GLOBALFOUNDRIES (Singapore) Pte. Ltd., 60 Woodlands Industrial Park D, Street 2, Singapore 738406, Singapore.
| | - Yantao Sun
- College of Physics, Jilin Normal University, Siping 136000, China.
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China.
| | - Yongjun Zhang
- College of Physics, Jilin Normal University, Siping 136000, China.
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China.
| | - Yaxin Wang
- College of Physics, Jilin Normal University, Siping 136000, China.
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China.
| | - Ziyang Lu
- School of Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Lei Chen
- College of Physics, Jilin Normal University, Siping 136000, China.
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China.
| | - Jinghai Yang
- College of Physics, Jilin Normal University, Siping 136000, China.
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China.
| | - Scott Guozhong Xing
- United Microelect Corp. Ltd., 3 Pasir Ris Dr 12, Singapore 519528, Singapore.
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Liu Y, Zhang Y, Kou Q, Chen Y, Sun Y, Han D, Wang D, Lu Z, Chen L, Yang J, Xing SG. Highly Efficient, Low-Cost, and Magnetically Recoverable FePt⁻Ag Nanocatalysts: Towards Green Reduction of Organic Dyes. Nanomaterials (Basel) 2018; 8:E329. [PMID: 29757998 PMCID: PMC5977343 DOI: 10.3390/nano8050329] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2018] [Revised: 05/11/2018] [Accepted: 05/11/2018] [Indexed: 11/17/2022]
Abstract
Nowadays, synthetic organic dyes and pigments discharged from numerous industries are causing unprecedentedly severe water environmental pollution, and conventional water treatment processes are hindered due to the corresponding sophisticated aromatic structures, hydrophilic nature, and high stability against light, temperature, etc. Herein, we report an efficient fabrication strategy to develop a new type of highly efficient, low-cost, and magnetically recoverable nanocatalyst, i.e., FePt⁻Ag nanocomposites, for the reduction of methyl orange (MO) and rhodamine B (RhB), by a facile seed deposition process. X-ray diffraction results elaborate that the as-synthesized FePt⁻Ag nanocomposites are pure disordered face-centered cubic phase. Transmission electron microscopy studies demonstrate that the amount of Ag seeds deposited onto the surfaces of FePt nanocrystals increases when increasing the additive amount of silver colloids. The linear correlation of the MO and RhB concentration versus reaction time catalyzed by FePt⁻Ag nanocatalysts is in line with pseudo-first-order kinetics. The reduction rate constants of MO and RhB increase with the increase of the amount of Ag seeds. FePt⁻Ag nanocomposites show good separation ability and reusability, and could be repeatedly applied for nearly complete reduction of MO and RhB for at least six successive cycles. Such cost-effective and recyclable nanocatalysts provide a new material family for use in environmental protection applications.
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Affiliation(s)
- Yang Liu
- College of Physics, Jilin Normal University, Siping 136000, China.
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China.
| | - Yuanyuan Zhang
- College of Physics, Jilin Normal University, Siping 136000, China.
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China.
| | - Qiangwei Kou
- College of Physics, Jilin Normal University, Siping 136000, China.
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China.
| | - Yue Chen
- College of Physics, Jilin Normal University, Siping 136000, China.
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China.
| | - Yantao Sun
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China.
| | - Donglai Han
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, China.
| | - Dandan Wang
- Technology Development Department, GLOBALFOUNDRIES (Singapore) Pte. Ltd., 60 Woodlands Industrial Park D, Street 2, Singapore 738406, Singapore.
| | - Ziyang Lu
- School of Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Lei Chen
- College of Physics, Jilin Normal University, Siping 136000, China.
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China.
| | - Jinghai Yang
- College of Physics, Jilin Normal University, Siping 136000, China.
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China.
| | - Scott Guozhong Xing
- United Microelect Corp. Ltd., 3 Pasir Ris Dr 12, Singapore 519528, Singapore.
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Guo R, Jiao T, Xing R, Chen Y, Guo W, Zhou J, Zhang L, Peng Q. Hierarchical AuNPs-Loaded Fe₃O₄/Polymers Nanocomposites Constructed by Electrospinning with Enhanced and Magnetically Recyclable Catalytic Capacities. Nanomaterials (Basel) 2017; 7:E317. [PMID: 29023427 PMCID: PMC5666482 DOI: 10.3390/nano7100317] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Revised: 10/10/2017] [Accepted: 10/10/2017] [Indexed: 02/07/2023]
Abstract
Gold nanoparticles (AuNPs) have attracted widespread attention for their excellent catalytic activity, as well as their unusual physical and chemical properties. The main challenges come from the agglomeration and time-consuming separation of gold nanoparticles, which have greatly baffled the development and application in liquid phase selective reduction. To solve these problems, we propose the preparation of polyvinyl alcohol(PVA)/poly(acrylic acid)(PAA)/Fe₃O₄ nanocomposites with loaded AuNPs. The obtained PVA/PAA/Fe₃O₄ composite membrane by electrospinning demonstrated high structural stability, a large specific surface area, and more active sites, which is conducive to promoting good dispersion of AuNPs on membrane surfaces. The subsequently prepared PVA/PAA/Fe₃O₄@AuNPs nanocomposites exhibited satisfactory nanostructures, robust thermal stability, and a favorable magnetic response for recycling. In addition, the PVA/PAA/Fe₃O₄@AuNPs nanocomposites showed a remarkable catalytic capacity in the catalytic reduction of p-nitrophenol and 2-nitroaniline solutions. In addition, the regeneration studies toward p-nitrophenol for different consecutive cycles demonstrate that the as-prepared PVA/PAA/Fe₃O₄@AuNPs nanocomposites have outstanding stability and recycling in catalytic reduction.
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Affiliation(s)
- Rong Guo
- State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China.
- Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China.
| | - Tifeng Jiao
- State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China.
- Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China.
| | - Ruirui Xing
- Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China.
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
| | - Yan Chen
- Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China.
| | - Wanchun Guo
- Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China.
| | - Jingxin Zhou
- Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China.
| | - Lexin Zhang
- Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China.
| | - Qiuming Peng
- State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China.
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Yin Q, Chen Q, Lu LC, Han BH. Sugar-based micro/mesoporous hypercross-linked polymers with in situ embedded silver nanoparticles for catalytic reduction. Beilstein J Org Chem 2017; 13:1212-1221. [PMID: 28694867 PMCID: PMC5496582 DOI: 10.3762/bjoc.13.120] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Accepted: 05/23/2017] [Indexed: 12/03/2022] Open
Abstract
Porous hypercross-linked polymers based on perbenzylated monosugars (SugPOP-1–3) have been synthesized by Friedel–Crafts reaction using formaldehyde dimethyl acetal as an external cross-linker. Three perbenzylated monosugars with similar chemical structure were used as monomers in order to tune the porosity. These obtained polymers exhibit microporous and mesoporous features. The highest Brunauer–Emmett–Teller specific surface area for the resulting polymers was found to be 1220 m2 g−1, and the related carbon dioxide storage capacity was found to be 14.4 wt % at 1.0 bar and 273 K. As the prepared porous polymer SugPOP-1 is based on hemiacetal glucose, Ag nanoparticles (AgNPs) can be successfully incorporated into the polymer by an in situ chemical reduction of freshly prepared Tollens’ reagent. The obtained AgNPs/SugPOP-1 composite demonstrates good catalytic activity in the reduction of 4-nitrophenol (4-NP) with an activity factor ka = 51.4 s−1 g−1, which is higher than some reported AgNP-containing composite materials.
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Affiliation(s)
- Qing Yin
- College of Chemistry, Xiangtan University, Xiangtan 411105, China.,CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
| | - Qi Chen
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
| | - Li-Can Lu
- College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Bao-Hang Han
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
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38
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Pan H, Jian YF, Chen NN, Liu HX, He C, He YF. [Optimization of Promoter and Support for Co-based/zeolites Catalysts in Catalytic Reduction of NO x by CH 4]. Huan Jing Ke Xue 2017; 38:3085-3094. [PMID: 29964653 DOI: 10.13227/j.hjkx.201610195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Catalytic behavior of Co-based/zeolites catalysts was investigated in NOx reduction by CH4. Optimization of promoter and support was investigated by catalytic tests, and the relationship between catalytic activity and catalyst structure was illustrated by catalyst characterization. Co-Fe/SAPO-34 exhibited the highest activity among various Co-base/zeolites catalysts. The maximum conversion of NOx with 52.7% was obtained on Co-Fe/SAPO-34 at 450℃. The inhibition of activity of Fe/zeolites became severe in the presence of SO2, CO2, and H2O. CO2 exerted virtually no effect on the SCR activity of Co-Fe/zeolites. The inhibition of NOx conversion by H2O was reversible for Co-Fe/zeolites catalysts. Cobalt species were mainly present in CoO and Co(OH)2 states in Co-Fe/SAPO-34. Co3O4and Co(OH)2 were the main cobalt species of Co-Fe/ZSM-5, while CoO, CoAl2O4 and Co3O4 might be present in Co-Fe/Beta. The ratio of Fe2+/Fe3+ in the surface layer of Co-Fe/zeolites decreased in the order of Co-Fe/ZSM-5(3.98) > Co-Fe/SAPO-34(0.52) > Co-Fe/Beta(0.43). The active states of cobalt species and suitable ratio of Fe2+/Fe3+ were important for the activity of Co-Fe/zeolites in CH4-SCR. CH4-SCR over Co-Fe/zeolite catalysts started with the adsorption of NO and CH4 on Brønsted acid sites of the zeolite to produce NO+and carbon-containing species(-C=O and -COO) in the presence of oxygen, respectively. Subsequently, the important intermediates of nitrate species were generated from NO+ at the active sites. Finally, nitrate species reacted with carbon-containing species to form N2 and CO2.
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Affiliation(s)
- Hua Pan
- Department of Environmental Science and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Yan-Fei Jian
- Department of Environmental Science and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Ning-Na Chen
- Department of Environmental Science and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Hong-Xia Liu
- Department of Environmental Science and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Chi He
- Department of Environmental Science and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Ya-Fei He
- Qiyuan(Xi'an) Dae Young Environmental Protection Technology Co., Ltd., Xi'an 710018, China
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Kim T, Fu X, Warther D, Sailor MJ. Size-Controlled Pd Nanoparticle Catalysts Prepared by Galvanic Displacement into a Porous Si-Iron Oxide Nanoparticle Host. ACS Nano 2017; 11:2773-2784. [PMID: 28195692 DOI: 10.1021/acsnano.6b07820] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Porous silicon nanoparticles containing both Pd and iron oxide nanoparticles are prepared and studied as magnetically recoverable catalysts for organic reductions. The Pd nanoparticles are generated in situ by electroless deposition of Pd(NH3)42+, where the porous Si skeleton acts as both a template and as a reducing agent and the released ammonia ligands raise the local pH to exert control over the size of the Pd nanoparticles. The nanocomposites are characterized by transmission electron microscopy, energy-dispersive X-ray spectroscopy, nitrogen adsorption, X-ray diffraction, superconducting quantum interference device magnetization, and dynamic light scattering. The nanocomposite consists of a porous Si nanoparticle (150 nm mean diameter) containing ∼20 nm pores, uniformly decorated with a high loading of surfactant-free Pd nanoparticles (12 nm mean diameter) and superparamagnetic γ-Fe2O3 nanoparticles (∼7 nm mean diameter). The reduction of 4-nitrophenol to 4-aminophenol by sodium borohydride is catalyzed by the nanocomposite, which is stable through the course of the reaction. Catalytic reduction of the organic dyes methylene blue and rhodamine B is also demonstrated. The conversion efficiency and catalytic activity are found to be superior to a commercial Pd/C catalyst compared under comparable reaction conditions. The composite catalyst can be recovered from the reaction mixture by applying an external magnetic field due to the existence of the superparamagnetic iron oxide nanoparticles in the construct. The recovered particles retain their catalytic activity.
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Affiliation(s)
- Taeho Kim
- Department of Chemistry and Biochemistry and ‡Department of Nanoengineering, University of California, San Diego , La Jolla, California 92093, United States
| | - Xin Fu
- Department of Chemistry and Biochemistry and ‡Department of Nanoengineering, University of California, San Diego , La Jolla, California 92093, United States
| | - David Warther
- Department of Chemistry and Biochemistry and ‡Department of Nanoengineering, University of California, San Diego , La Jolla, California 92093, United States
| | - Michael J Sailor
- Department of Chemistry and Biochemistry and ‡Department of Nanoengineering, University of California, San Diego , La Jolla, California 92093, United States
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Paredes JI, Munuera JM, Villar-Rodil S, Guardia L, Ayán-Varela M, Pagán A, Aznar-Cervantes SD, Cenis JL, Martínez-Alonso A, Tascón JMD. Impact of Covalent Functionalization on the Aqueous Processability, Catalytic Activity, and Biocompatibility of Chemically Exfoliated MoS 2 Nanosheets. ACS Appl Mater Interfaces 2016; 8:27974-27986. [PMID: 27704765 DOI: 10.1021/acsami.6b08444] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Chemically exfoliated MoS2 (ce-MoS2) has emerged in recent years as an attractive two-dimensional material for use in relevant technological applications, but fully exploiting its potential and versatility will most probably require the deployment of appropriate chemical modification strategies. Here, we demonstrate that extensive covalent functionalization of ce-MoS2 nanosheets with acetic acid groups (∼0.4 groups grafted per MoS2 unit) based on the organoiodide chemistry brings a number of benefits in terms of their processability and functionality. Specifically, the acetic acid-functionalized nanosheets were furnished with long-term (>6 months) colloidal stability in aqueous medium at relatively high concentrations, exhibited a markedly improved temporal retention of catalytic activity toward the reduction of nitroarenes, and could be more effectively coupled with silver nanoparticles to form hybrid nanostructures. Furthermore, in vitro cell proliferation tests carried out with murine fibroblasts suggested that the chemical derivatization had a positive effect on the biocompatibility of ce-MoS2. A hydrothermal annealing procedure was also implemented to promote the structural conversion of the functionalized nanosheets from the 1T phase that was induced during the chemical exfoliation step to the original 2H phase of the starting bulk material, while retaining at the same time the aqueous colloidal stability afforded by the presence of the acetic acid groups. Overall, by highlighting the benefits of this type of chemical derivatization, the present work should contribute to strengthen the position of ce-MoS2 as a two-dimensional material of significant practical utility.
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Affiliation(s)
- Juan I Paredes
- Instituto Nacional del Carbón, INCAR-CSIC , Apartado 73, 33080 Oviedo, Spain
| | - José M Munuera
- Instituto Nacional del Carbón, INCAR-CSIC , Apartado 73, 33080 Oviedo, Spain
| | - Silvia Villar-Rodil
- Instituto Nacional del Carbón, INCAR-CSIC , Apartado 73, 33080 Oviedo, Spain
| | - Laura Guardia
- Instituto Nacional del Carbón, INCAR-CSIC , Apartado 73, 33080 Oviedo, Spain
| | - Miguel Ayán-Varela
- Instituto Nacional del Carbón, INCAR-CSIC , Apartado 73, 33080 Oviedo, Spain
| | - Ana Pagán
- Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA) , Calle Mayor 1, 30150 La Alberca, Spain
| | - Salvador D Aznar-Cervantes
- Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA) , Calle Mayor 1, 30150 La Alberca, Spain
| | - José L Cenis
- Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA) , Calle Mayor 1, 30150 La Alberca, Spain
| | | | - Juan M D Tascón
- Instituto Nacional del Carbón, INCAR-CSIC , Apartado 73, 33080 Oviedo, Spain
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Zhang W, Cai Y, Qian R, Zhao B, Zhu P. Synthesis of Ball-Like Ag Nanorod Aggregates for Surface-Enhanced Raman Scattering and Catalytic Reduction. Nanomaterials (Basel) 2016; 6:E99. [PMID: 28335227 DOI: 10.3390/nano6060099] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 05/18/2016] [Accepted: 05/18/2016] [Indexed: 01/01/2023]
Abstract
In this work, ball-like Ag nanorod aggregates have been synthesized via a simple seed-mediated method. These Ag mesostructures were characterized by scanning electron microscope (SEM), transmission electron microscopy (TEM), ultraviolet-visible spectroscopy (UV-Vis), and X-ray diffraction (XRD). Adding a certain amount of polyvinyl pyrrolidone (PVP) can prolong its coagulation time. These Ag nanorod aggregates exhibit effective SERS effect, evaluated by Rhodamine 6G (R6G) and doxorubicin (DOX) as probe molecules. The limit of detection (LOD) for R6G and DOX are as low as 5 × 10-9 M and 5 × 10-6 M, respectively. Moreover, these Ag nanorod aggregates were found to be potential catalysts for the reduction of 4-nitrophenol (4-NP) in the presence of NaBH₄.
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Villalobos LF, Xie Y, Nunes SP, Peinemann KV. Polymer and Membrane Design for Low Temperature Catalytic Reactions. Macromol Rapid Commun 2016; 37:700-4. [PMID: 26924218 DOI: 10.1002/marc.201500735] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Revised: 01/15/2016] [Indexed: 11/09/2022]
Abstract
Catalytically active asymmetric membranes have been developed with high loadings of palladium nanoparticles located solely in the membrane's ultrathin skin layer. The manufacturing of these membranes requires polymers with functional groups, which can form insoluble complexes with palladium ions. Three polymers have been synthesized for this purpose and a complexation/nonsolvent induced phase separation followed by a palladium reduction step is carried out to prepare such membranes. Parameters to optimize the skin layer thickness and porosity, the palladium loading in this layer, and the palladium nanoparticles size are determined. The catalytic activity of the membranes is verified with the reduction of a nitro-compound and with a liquid phase Suzuki-Miyaura coupling reaction. Very low reaction times are observed.
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Affiliation(s)
- Luis Francisco Villalobos
- Advanced Membranes and Porous Materials Center, 4700 King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Kingdom of Saudi Arabia
| | - Yihui Xie
- Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Kingdom of Saudi Arabia
| | - Suzana Pereira Nunes
- Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Kingdom of Saudi Arabia
| | - Klaus-Viktor Peinemann
- Advanced Membranes and Porous Materials Center, 4700 King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Kingdom of Saudi Arabia
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Ayán-Varela M, Villar-Rodil S, Paredes JI, Munuera JM, Pagán A, Lozano-Pérez AA, Cenis JL, Martínez-Alonso A, Tascón JMD. Investigating the Dispersion Behavior in Solvents, Biocompatibility, and Use as Support for Highly Efficient Metal Catalysts of Exfoliated Graphitic Carbon Nitride. ACS Appl Mater Interfaces 2015; 7:24032-45. [PMID: 26465228 DOI: 10.1021/acsami.5b06974] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The liquid-phase exfoliation of graphitic carbon nitride (g-C3N4) to afford colloidal dispersions of two-dimensional flakes constitutes an attractive route to facilitate the processing and implementation of this novel material toward different technological applications, but quantitative knowledge about its dispersibility in solvents is lacking. Here, we investigate the dispersion behavior of exfoliated g-C3N4 in a wide range of solvents and evaluate the obtained results on the basis of solvent surface energy and Hildebrand/Hansen solubility parameters. Estimates of the three Hansen parameters for exfoliated g-C3N4 from the experimentally derived data yielded δD ≈ 17.8 MPa(1/2), δP ≈ 10.8 MPa(1/2), and δH ≈ 15.4 MPa(1/2). The relatively high δH value suggested that, contrary to the case of other two-dimensional materials (e.g., graphene or transition metal dichalcogenides), hydrogen-bonding plays a substantial role in the efficient interaction, and thus dispersibility, of exfoliated g-C3N4 with solvents. Such an outcome was attributed to a high density of primary and/or secondary amines in the material, the presence of which was associated with incomplete condensation of the structure. Furthermore, cell proliferation tests carried out on thin films of exfoliated g-C3N4 using murine fibroblasts suggested that this material is highly biocompatible and noncytotoxic. Finally, the exfoliated g-C3N4 flakes were used as supports in the synthesis of Pd nanoparticles, and the resulting hybrids exhibited an exceptional catalytic activity in the reduction of nitroarenes.
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Affiliation(s)
- M Ayán-Varela
- Instituto Nacional del Carbón, INCAR-CSIC , Apartado 73, 33080 Oviedo, Spain
| | - S Villar-Rodil
- Instituto Nacional del Carbón, INCAR-CSIC , Apartado 73, 33080 Oviedo, Spain
| | - J I Paredes
- Instituto Nacional del Carbón, INCAR-CSIC , Apartado 73, 33080 Oviedo, Spain
| | - J M Munuera
- Instituto Nacional del Carbón, INCAR-CSIC , Apartado 73, 33080 Oviedo, Spain
| | - A Pagán
- Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA) , Calle Mayor 1, 30150 La Alberca, Spain
| | - A A Lozano-Pérez
- Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA) , Calle Mayor 1, 30150 La Alberca, Spain
| | - J L Cenis
- Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA) , Calle Mayor 1, 30150 La Alberca, Spain
| | - A Martínez-Alonso
- Instituto Nacional del Carbón, INCAR-CSIC , Apartado 73, 33080 Oviedo, Spain
| | - J M D Tascón
- Instituto Nacional del Carbón, INCAR-CSIC , Apartado 73, 33080 Oviedo, Spain
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Yang T, Zou HY, Huang CZ. Synergetic catalytic effect of Cu2-xSe nanoparticles and reduced graphene oxide coembedded in electrospun nanofibers for the reduction of a typical refractory organic compound. ACS Appl Mater Interfaces 2015; 7:15447-15457. [PMID: 26114332 DOI: 10.1021/acsami.5b03645] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A new heterogeneous catalytic composite composed of nonstoichiometric Cu2-xSe nanoparticles (NPs) with high copper deficiency and graphene oxide (GO) is prepared by coembedding in electrospun nanofibers of a poly(vinylpyrrolidone) (PVP) support, wherein GO in the nanofibers is converted into reduced GO (rGO) via heat treatment. The as-prepared composite Cu2-xSe/rGO/PVP nanofibers have demonstrated superior catalytic activity toward the reduction of a refractory organic compound by taking 4-nitrophenol (4-NP) as an example. In the presence of NaBH4, the Cu2-xSe/rGO/PVP nanofibers display a synergetic effect between Cu2-xSe and rGO in PVP nanofibers compared to their independent components or corresponding nanofibers. Furthermore, the Cu2-xSe/rGO/PVP nanofibers exhibit a favorable water-stable property via heat treatment to solidify the hydrophilic PVP matrix, which makes the composite display good reusability, stability in aqueous solution, and separability from a water medium. This work not only presents a direct, convenient, and effective approach to doping semiconductor nanomaterials into polymer nanofibers but also provides fundamental routes for further investigations about the synergetic effect between different materials based on the platform of electrospun nanofibers.
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Affiliation(s)
- Tong Yang
- †Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China
| | - Hong Yan Zou
- ‡College of Pharmaceutical Science, Southwest University, Chongqing 400716, P. R. China
| | - Cheng Zhi Huang
- †Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China
- ‡College of Pharmaceutical Science, Southwest University, Chongqing 400716, P. R. China
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Ayán-Varela M, Paredes JI, Guardia L, Villar-Rodil S, Munuera JM, Díaz-González M, Fernández-Sánchez C, Martínez-Alonso A, Tascón JMD. Achieving extremely concentrated aqueous dispersions of graphene flakes and catalytically efficient graphene-metal nanoparticle hybrids with flavin mononucleotide as a high-performance stabilizer. ACS Appl Mater Interfaces 2015; 7:10293-307. [PMID: 25915172 DOI: 10.1021/acsami.5b00910] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
The stable dispersion of graphene flakes in an aqueous medium is highly desirable for the development of materials based on this two-dimensional carbon structure, but current production protocols that make use of a number of surfactants typically suffer from limitations regarding graphene concentration or the amount of surfactant required to colloidally stabilize the sheets. Here, we demonstrate that an innocuous and readily available derivative of vitamin B2, namely the sodium salt of flavin mononucleotide (FMNS), is a highly efficient dispersant in the preparation of aqueous dispersions of defect-free, few-layer graphene flakes. Most notably, graphene concentrations in water as high as ∼50 mg mL(-1) using low amounts of FMNS (FMNS/graphene mass ratios of about 0.04) could be attained, which facilitated the formation of free-standing graphene films displaying high electrical conductivity (∼52000 S m(-1)) without the need of carrying out thermal annealing or other types of post-treatment. The excellent performance of FMNS as a graphene dispersant could be attributed to the combined effect of strong adsorption on the sheets through the isoalloxazine moiety of the molecule and efficient colloidal stabilization provided by its negatively charged phosphate group. The FMNS-stabilized graphene sheets could be decorated with nanoparticles of several noble metals (Ag, Pd, and Pt), and the resulting hybrids exhibited a high catalytic activity in the reduction of nitroarenes and electroreduction of oxygen. Overall, the present results should expedite the processing and implementation of graphene in, e.g., conductive inks, composites, and hybrid materials with practical utility in a wide range of applications.
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Affiliation(s)
- M Ayán-Varela
- †Instituto Nacional del Carbón, INCAR-CSIC, Apartado 73, 33080 Oviedo, Spain
| | - J I Paredes
- †Instituto Nacional del Carbón, INCAR-CSIC, Apartado 73, 33080 Oviedo, Spain
| | - L Guardia
- †Instituto Nacional del Carbón, INCAR-CSIC, Apartado 73, 33080 Oviedo, Spain
| | - S Villar-Rodil
- †Instituto Nacional del Carbón, INCAR-CSIC, Apartado 73, 33080 Oviedo, Spain
| | - J M Munuera
- †Instituto Nacional del Carbón, INCAR-CSIC, Apartado 73, 33080 Oviedo, Spain
| | - M Díaz-González
- ‡Instituto de Microelectrónica de Barcelona, IMB-CNM (CSIC), Campus UAB, 08193 Bellaterra, Barcelona, Spain
| | - C Fernández-Sánchez
- ‡Instituto de Microelectrónica de Barcelona, IMB-CNM (CSIC), Campus UAB, 08193 Bellaterra, Barcelona, Spain
| | - A Martínez-Alonso
- †Instituto Nacional del Carbón, INCAR-CSIC, Apartado 73, 33080 Oviedo, Spain
| | - J M D Tascón
- †Instituto Nacional del Carbón, INCAR-CSIC, Apartado 73, 33080 Oviedo, Spain
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Xiao W, Zhang Y, Liu B. Raspberrylike SiO2@reduced graphene oxide@AgNP composite microspheres with high aqueous dispersity and excellent catalytic activity. ACS Appl Mater Interfaces 2015; 7:6041-6046. [PMID: 25746066 DOI: 10.1021/acsami.5b00296] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The hybridizations of functional microspheres with graphene or graphene oxide (GO) sheets often suffer from severe agglomeration behaviors, leading to poor water dispersity of the resultant composite materials. Here, we first demonstrate that the sonication-assisted self-assembly of tiny GO sheets (whose lateral size less than 200 nm) on microspheric substrates like cationic polyelectrolyte-modified SiO2 microspheres could effectively overcome such a common drawback. On the basis of this facile strategy, we further developed reduced graphene oxide/silver nanoparticle composite film wrapped SiO2 microspheres, which not only possessed unique raspberrylike structure and high aqueous dispersity but also exhibited exceptional catalytic activity toward the reduction of 4-nitrophenol.
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Affiliation(s)
- Wei Xiao
- Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Yongchuan Chongqing 402160, China
| | - Yanhua Zhang
- Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Yongchuan Chongqing 402160, China
| | - Bitao Liu
- Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Yongchuan Chongqing 402160, China
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Li Y, Qin C, Zhang J, Lan Y, Zhou L. Cu(II) Catalytic Reduction of Cr(VI) by Tartaric Acid Under the Irradiation of Simulated Solar Light. Environ Eng Sci 2014; 31:447-452. [PMID: 25125941 PMCID: PMC4118708 DOI: 10.1089/ees.2013.0407] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Accepted: 05/08/2014] [Indexed: 05/18/2023]
Abstract
Cu(II) catalytic reduction of Cr(VI) by tartaric acid under the irradiation of simulated solar light was investigated through batch experiments at pHs from 3 to 6 and at temperatures from 15°C to 35°C. Results demonstrated that introduction of Cu(II) could markedly improve reduction of Cr(VI) in comparison with tartaric acid alone. Optimal removal of Cr(VI) was achieved at pH 4. Reduction of Cr(VI) increased with increasing temperatures and initial concentrations of Cu(II) and tartaric acid. The catalytic role of Cu(II) in the reduction of Cr(VI) was ascribed to the formation of Cu(II)-tartaric acid complex, which generated active reductive intermediates, including Cu(I) and tartaric acid radicals through a pathway of metal-ligand-electron transfer with light. Cu(II) photocatalytic reduction of Cr(VI) by tartaric acid followed pseudo zero-order kinetics with regard to Cr(VI), and the activation energy was calculated to be 21.48 kJ/mol. To date, such a role of Cu(II) has not been reported. The results from the present study are helpful in fully understanding the photochemical reductive behavior of Cr(VI) in the presence of both tartaric acid and Cu(II) in soil and aquatic environments.
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Affiliation(s)
- Ying Li
- College of Sciences, Nanjing Agricultural University, Nanjing, P.R. China
| | - Chao Qin
- College of Sciences, Nanjing Agricultural University, Nanjing, P.R. China
| | - Jing Zhang
- College of Sciences, Nanjing Agricultural University, Nanjing, P.R. China
| | - Yeqing Lan
- College of Sciences, Nanjing Agricultural University, Nanjing, P.R. China
- Corresponding author: College of Sciences, Nanjing Agricultural University, Nanjing 210095, P.R. China. Phone: 086-25-84396697; Fax: 086-25-84395255; E-mail:
| | - Lixiang Zhou
- College of Resources and Environments, Nanjing Agricultural University, Nanjing, P.R. China
- Corresponding author: College of Resources and Environments, Nanjing Agricultural University, Nanjing 210095, P.R. China. Phone: 086-25-84395160; Fax: 086-25-84395160; E-mail:
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