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Bessoni Kosctiuk J, Ribeiro Neto ME, Alcoforado Pereira G, Krieger N, Zambelli Mezalira D, Pilissão C. A Multicomponent Mannich Reaction Catalyzed by Hydrolases Immobilized on Titanate Nanotubes. Chempluschem 2024; 89:e202300698. [PMID: 38242852 DOI: 10.1002/cplu.202300698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 01/18/2024] [Accepted: 01/19/2024] [Indexed: 01/21/2024]
Abstract
This study presents an innovative method for synthesizing β-amino carbonylated compounds, specifically 2-[phenyl(phenylamino)methyl] cyclohexanone, achieving high conversions and diastereomeric ratios. Using trypsin or α-chymotrypsin in both free and immobilized forms on titanate nanotubes (NtsTi), synthesized through alkaline hydrothermal methods, successful immobilization yields were attained. Notably, α-chymotrypsin, when free, displayed a diastereoselective synthesis of the anti-isomer with 97 % conversion and 16 : 84 (syn : anti) diastereomeric ratio, which slightly decreased upon immobilization on NtsTi. Trypsin, in its free form, exhibited diastereoselective recognition of the syn-isomer, while immobilization on NtsTi (trypsin/NtsTi) led to an inversion of diastereomeric ratio. Both trypsin/NtsTi and α-chymotrypsin/NtsTi demonstrated significant catalytic efficiency over five cycles. In conclusion, NtsTi serves as an effective support for trypsin and α-chymotrypsin immobilization, presenting promising prospects for diastereoselective synthesis and potential industrial applications. Furthermore, it offers promising prospects for the diastereoselective synthesis of 2-[phenyl(phenylamino)methyl] cyclohexanone through multicomponent Mannich reaction and future industrial application.
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Affiliation(s)
- Juliane Bessoni Kosctiuk
- Department of Chemistry and Biology, Federal University Technological of Paraná, 81280-340, Curitiba, PR, Brazil
| | - Matheus Enrique Ribeiro Neto
- Department of Chemistry and Biology, Federal University Technological of Paraná, 81280-340, Curitiba, PR, Brazil
| | - Gabriela Alcoforado Pereira
- Department of Chemistry and Biology, Federal University Technological of Paraná, 81280-340, Curitiba, PR, Brazil
| | - Nadia Krieger
- Department of Chemistry, Federal University of Paraná, 81531-980, Curitiba, PR, Brazil
| | | | - Cristiane Pilissão
- Department of Chemistry and Biology, Federal University Technological of Paraná, 81280-340, Curitiba, PR, Brazil
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2
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Che Z, Yuan Y, Qin J, Li P, Chen Y, Wu Y, Ding M, Zhang F, Cui M, Guo Y, Wang S. Progress of Nonmetallic Electrocatalysts for Oxygen Reduction Reactions. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1945. [PMID: 37446461 DOI: 10.3390/nano13131945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 06/14/2023] [Accepted: 06/24/2023] [Indexed: 07/15/2023]
Abstract
As a key role in hindering the large-scale application of fuel cells, oxygen reduction reaction has always been a hot issue and nodus. Aiming to explore state-of-art electrocatalysts, this paper reviews the latest development of nonmetallic catalysts in oxygen reduction reactions, including single atoms doped with carbon materials such as N, B, P or S and multi-doped carbon materials. Afterward, the remaining challenges and research directions of carbon-based nonmetallic catalysts are prospected.
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Affiliation(s)
- Zhongmei Che
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology, Shandong Academy of Sciences, 3501, Daxue Road, Changqing District, Jinan 250353, China
| | - Yanan Yuan
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology, Shandong Academy of Sciences, 3501, Daxue Road, Changqing District, Jinan 250353, China
| | - Jianxin Qin
- Qingdao Haiwang Paper Co., Ltd., 1218, Haiwang Road, Huangdao District, Qingdao 266431, China
| | - Peixuan Li
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology, Shandong Academy of Sciences, 3501, Daxue Road, Changqing District, Jinan 250353, China
| | - Yulei Chen
- Qingdao Haiwang Paper Co., Ltd., 1218, Haiwang Road, Huangdao District, Qingdao 266431, China
| | - Yue Wu
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology, Shandong Academy of Sciences, 3501, Daxue Road, Changqing District, Jinan 250353, China
| | - Meng Ding
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology, Shandong Academy of Sciences, 3501, Daxue Road, Changqing District, Jinan 250353, China
| | - Fei Zhang
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology, Shandong Academy of Sciences, 3501, Daxue Road, Changqing District, Jinan 250353, China
| | - Min Cui
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology, Shandong Academy of Sciences, 3501, Daxue Road, Changqing District, Jinan 250353, China
| | - Yingshu Guo
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology, Shandong Academy of Sciences, 3501, Daxue Road, Changqing District, Jinan 250353, China
| | - Shuai Wang
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology, Shandong Academy of Sciences, 3501, Daxue Road, Changqing District, Jinan 250353, China
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Rodrigues GLC, de Oliveira TG, Gusmão SBS, Ferreira OP, Vasconcelos TL, Guerra Y, Milani R, Peña-Garcia R, Viana BC. Study of Structural and Optical Properties of Titanate Nanotubes with Erbium under Heat Treatment in Different Atmospheres. MATERIALS (BASEL, SWITZERLAND) 2023; 16:1842. [PMID: 36902957 PMCID: PMC10004321 DOI: 10.3390/ma16051842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 01/27/2023] [Accepted: 02/02/2023] [Indexed: 06/18/2023]
Abstract
Titanate nanotubes were synthesized and subjected to an ion exchange reaction with erbium salt aqueous solution to obtain titanate nanotubes exchanged with erbium (3+) ions. In order to evaluate the effects of the thermal treatment atmosphere on the structural and optical properties of erbium titanate nanotubes, we subjected them to heat treatment in air and argon atmospheres. For comparison, titanate nanotubes were also treated in the same conditions. A complete structural and optical characterizations of the samples was performed. The characterizations evidenced the preservation of the morphology with the presence of phases of erbium oxides decorating the surface of the nanotubes. Variations in the dimensions of the samples (diameter and interlamellar space) were promoted by the replacement of Na+ by Er3+ and the thermal treatment in different atmospheres. In addition, the optical properties were investigated by UV-Vis absorption spectroscopy and photoluminescence spectroscopy. The results revealed that the band gap of the samples depends on the variation of diameter and sodium content caused by ion exchange and thermal treatment. Furthermore, the luminescence strongly depended on vacancies, evidenced mainly by the calcined erbium titanate nanotubes in argon atmosphere. The presence of these vacancies was confirmed by the determination of Urbach energy. The results suggest the use of thermal treated erbium titanate nanotubes in argon atmosphere in optoelectronics and photonics applications, such as photoluminescent devices, displays, and lasers.
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Affiliation(s)
- Gelson L. C. Rodrigues
- Federal Institute of Piauí (IFPI), Parnaíba 64211-145, PI, Brazil
- Interdisciplinary Laboratory of Advanced Materials (LIMAV), Materials Science and Engineering Graduate Program, Federal University of Piauí (UFPI), Teresina 64049-550, PI, Brazil
| | - Tainara G. de Oliveira
- Interdisciplinary Laboratory of Advanced Materials (LIMAV), Materials Science and Engineering Graduate Program, Federal University of Piauí (UFPI), Teresina 64049-550, PI, Brazil
| | - Suziete B. S. Gusmão
- Interdisciplinary Laboratory of Advanced Materials (LIMAV), Materials Science and Engineering Graduate Program, Federal University of Piauí (UFPI), Teresina 64049-550, PI, Brazil
| | - Odair P. Ferreira
- Department of Chemistry, State University of Londrina, Londrina 86050-482, PR, Brazil
| | - Thiago L. Vasconcelos
- National Institute of Metrology, Quality and Technology (Inmetro), Duque de Caxias 25250-02, RJ, Brazil
| | - Yuset Guerra
- Department of Physics, Federal University of Piauí (UFPI), Teresina 64049-550, PI, Brazil
| | - Raquel Milani
- Department of Physics, Federal University of Pernambuco (UFPE), Recife 50670-901, PE, Brazil
| | - Ramón Peña-Garcia
- Interdisciplinary Laboratory of Advanced Materials (LIMAV), Materials Science and Engineering Graduate Program, Federal University of Piauí (UFPI), Teresina 64049-550, PI, Brazil
- Academic Unit of Cabo de Santo Agostinho, Federal Rural University of Pernambuco (UFRPE), Cabo de Santo Agostinho 50670-901, PE, Brazil
| | - Bartolomeu C. Viana
- Interdisciplinary Laboratory of Advanced Materials (LIMAV), Materials Science and Engineering Graduate Program, Federal University of Piauí (UFPI), Teresina 64049-550, PI, Brazil
- Department of Physics, Federal University of Piauí (UFPI), Teresina 64049-550, PI, Brazil
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TiOx-supported Na-Mn-W oxides for the oxidative coupling of methane. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.12.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Olive Leaf Extracts for a Green Synthesis of Silver-Functionalized Multi-Walled Carbon Nanotubes. J Funct Biomater 2022; 13:jfb13040224. [PMID: 36412865 PMCID: PMC9680358 DOI: 10.3390/jfb13040224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 10/30/2022] [Accepted: 11/01/2022] [Indexed: 11/09/2022] Open
Abstract
Green biosynthesis, one of the most dependable and cost-effective methods for producing carbon nanotubes, was used to synthesize nonhazardous silver-functionalized multi-walled carbon nanotubes (SFMWCNTs) successfully. It has been shown that the water-soluble organic materials present in the olive oil plant play a vital role in converting silver ions into silver nanoparticles (Ag-NPs). Olive-leaf extracts contain medicinal properties and combining these extracts with Ag-NPs is often a viable option for enhancing drug delivery; thus, this possibility was employed for in vitro treating cancer cells as a proof of concept. In this study, the green technique for preparing SFMWCNTs composites using plant extracts was followed. This process yielded various compounds, the most important of which were Hydroxytyrosol, Tyrosol, and Oleuropein. Subsequently, a thin film was fabricated from the extract, resulting in a natural polymer. The obtained nanomaterials have an absorption peak of 419 nm in their UV-Vis. spectra. SEM and EDS were also used to investigate the SFMWCNT nanocomposites' morphology simultaneously. Moreover, the MTT assay was used to evaluate the ability of SFMWCNTs to suppress cancer cell viability on different cancer cell lines, MCF7 (human breast adenocarcinoma), HepG2 (human hepatocellular carcinoma), and SW620 (human colorectal cancer). Using varying doses of SFMWCNT resulted in the most significant cell viability inhibition, indicating the good sensitivity of SFMWCNTs for treating cancer cells. It was found that performing olive-leaf extraction at a low temperature in an ice bath leads to superior results, and the developed SFMWCNT nanocomposites could be potential treatment options for in vitro cancer cells.
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Sales DA, Lima PNS, Silva LS, Marques TMF, Gusmão SBS, Ferreira OP, Ghosh A, Guerra Y, Morais AÍS, Bezerra RDS, Silva-Filho EC, Viana BC. Amino-Functionalized Titanate Nanotubes: pH and Kinetic Study of a Promising Adsorbent for Acid Dye in Aqueous Solution. MATERIALS (BASEL, SWITZERLAND) 2022; 15:6393. [PMID: 36143705 PMCID: PMC9503076 DOI: 10.3390/ma15186393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 09/05/2022] [Accepted: 09/13/2022] [Indexed: 06/16/2023]
Abstract
This work reports the functionalization of sodium titanate nanotubes with amine groups obtained from the reaction of titanate nanotubes with [3-(2-Aminoethylamino)propyl]trimethoxysilane, NaTiNT-2NH, and 3-[2-(2-Aminoethylamino)ethylamino]propyltrimethoxysilane, NaTiNT-3NH. It was verified that the crystalline and morphological structures of NaTiNT were preserved after the functionalization, spectroscopies showed that aminosilane interacted covalently with the surface of NaTiNT, and the incorporation of the aminosilane groups on the surface of NaTiNT can be confirmed. The adsorbent matrices NaTiNT-2NH and NaTiNT-3NH were used to remove the anionic dye from remazol blue R (RB) in aqueous medium, and the highest adsorption capacity was around 365.84 mg g-1 (NaTiNT-2NH) and 440.70 mg g-1 (NaTiNT-3NH) in the range of pH 5.0 to 10.0 and the equilibrium time was reached in 210 min (NaTiNT-2NH) and 270 min (NaTiNT-3NH). Furthermore, the Elovich model, which reports the adsorption in heterogeneous sites and with different activation energies in the chemisorption process, was the most appropriate to describe the adsorption kinetics. Thus, these adsorbent matrices can be used as an alternative potential for dye removal RB in aqueous solution.
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Affiliation(s)
- Débora A. Sales
- Interdisciplinary Laboratory for Advanced Materials (LIMAV), Materials Science & Engineering Graduate Program, Federal University of Piauí (UFPI), Teresina 64049-550, PI, Brazil
| | - Paloma N. S. Lima
- Interdisciplinary Laboratory for Advanced Materials (LIMAV), Materials Science & Engineering Graduate Program, Federal University of Piauí (UFPI), Teresina 64049-550, PI, Brazil
| | | | | | - Suziete B. S. Gusmão
- Interdisciplinary Laboratory for Advanced Materials (LIMAV), Materials Science & Engineering Graduate Program, Federal University of Piauí (UFPI), Teresina 64049-550, PI, Brazil
| | - Odair P. Ferreira
- Laboratório de Materiais Funcionais Avançados (LaMFA), Departament of Physics, Federal University of Ceará (UFC), Fortaleza 60455-900, CE, Brazil
| | - Anupama Ghosh
- Laboratório de Materiais Funcionais Avançados (LaMFA), Departament of Physics, Federal University of Ceará (UFC), Fortaleza 60455-900, CE, Brazil
- Central Analítica, Federal University of Ceará (UFC), Fortaleza 60455-900, CE, Brazil
| | - Yuset Guerra
- Department of Physics, Federal University of Piauí (UFPI), Teresina 64049-550, PI, Brazil
| | - Alan Í. S. Morais
- Interdisciplinary Laboratory for Advanced Materials (LIMAV), Materials Science & Engineering Graduate Program, Federal University of Piauí (UFPI), Teresina 64049-550, PI, Brazil
| | - Roosevelt D. S. Bezerra
- Federal Institute of Education, Science and Technology of Piauí (IFPI), Teresina 64000-040, PI, Brazil
| | - Edson C. Silva-Filho
- Interdisciplinary Laboratory for Advanced Materials (LIMAV), Materials Science & Engineering Graduate Program, Federal University of Piauí (UFPI), Teresina 64049-550, PI, Brazil
| | - Bartolomeu C. Viana
- Interdisciplinary Laboratory for Advanced Materials (LIMAV), Materials Science & Engineering Graduate Program, Federal University of Piauí (UFPI), Teresina 64049-550, PI, Brazil
- Department of Physics, Federal University of Piauí (UFPI), Teresina 64049-550, PI, Brazil
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7
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Li L, Tao R, Liu Y, Zhou K, Fan X, Han Y, Tang L. Co3O4 nanoparticles/Bi2O3 nanosheets: One step synthesis, high-efficiency thermal catalytic performance, and catalytic mechanism research. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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8
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CO Oxidation over Pd Catalyst Supported on Porous TiO 2 Prepared by Plasma Electrolytic Oxidation (PEO) of a Ti Metallic Carrier. MATERIALS 2022; 15:ma15124301. [PMID: 35744362 PMCID: PMC9229716 DOI: 10.3390/ma15124301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 06/08/2022] [Accepted: 06/14/2022] [Indexed: 02/06/2023]
Abstract
A porous TiO2 layer was prepared with the plasma electrolytic oxidation (PEO) of Ti. In a further step, Pd was deposited on the TiO2 surface layer using the adsorption method. The activity of the Pd/TiO2/Ti catalyst was investigated during the oxidation of CO to CO2 in a mixture of air with 5% CO. The structure of the catalytic active layer was studied using a scanning electron microscope equipped with an energy dispersive spectrometer (SEM-EDS), time-of-flight secondary ion mass spectrometry (TOF-SIMS), inductively coupled plasma mass spectrometry (ICP-MS), and X-ray diffraction (XRD). The PEO process provided a porous TiO2 layer with a uniform thickness in the range of 5-10 µm, which is desirable for the production of Pd-supported catalysts. A TOF-SIMS analysis showed the formation of Pd nanoparticles after the adsorption treatment. The conversion of CO to CO2 in all samples was achieved at 150-280 °C, depending on the concentration of Pd. The composition of Pd/ TiO2/Ti was determined using ICP-MS. The optimum concentration of Pd on the surface of the catalyst was approximately 0.14% wt. This concentration was obtained when a 0.4% PdCl2 solution was used in the adsorption process. Increasing the concentration of PdCl2 did not lead to a further improvement in the activity of Pd/ TiO2/Ti.
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Bhagya T, Elias L, Kiss J, Kónya Z, Manoj S, Shibli S. Interfacial charge separation of nickel phosphide anchored on anatase-hematite heterojunction for stimulating visible light driven hydrogen generation. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 2022. [DOI: 10.1016/j.ijhydene.2022.05.148] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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Yang TY, Zhang Y, Zhang GL, Zhang JJ, Zhang YH. A Sulfonated Porphyrin Polymer/P25m Composite for Highly Selective Photocatalytic Conversion of CO2 into CH4. Catal Letters 2022. [DOI: 10.1007/s10562-022-03986-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Recent Advances in MOF-Based Adsorbents for Dye Removal from the Aquatic Environment. ENERGIES 2022. [DOI: 10.3390/en15062023] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The adsorptive removal of dyes from industrial wastewater using commercially available adsorbents is not significantly efficient. Metal–organic frameworks (MOFs) offer outstanding properties which can boost the separation performance over current commercial adsorbents and hence, these materials represent a milestone in improving treatment methods for dye removal from water. Accordingly, in this paper, the recent studies in the modification of MOF structures in dye removal from the aquatic environment have been discussed. This study aims to elaborate on the synthetic strategies applied to improve the adsorption efficiency and to discuss the major adsorption mechanisms as well as the most influential parameters in the adsorptive removal of dyes using MOFs. More particularly, the advanced separation performance of MOF-based adsorbents will be comprehensively explained. The introduction of various functional groups and nanomaterials, such as amine functional groups, magnetic nanoparticles, and carbon-based materials such as graphene oxide and CNT, onto the MOFs can alter the removal efficiency of MOF-based adsorbents through enhancing the water stability, dispersion in water, interactions between the MOF structure and the contaminant, and the adsorption capacity. Finally, we summarize the challenges experienced by MOF-based materials for dye removal from water and propose future research outlooks to be considered.
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Qayyum A, Giannakoudakis DA, LaGrow AP, Bondarchuk O, Łomot D, Colmenares JC. High-frequency sonication for the synthesis of nanocluster-decorated titania nanorods: Making a better photocatalyst for the selective oxidation of monoaromatic alcohol. CATAL COMMUN 2022. [DOI: 10.1016/j.catcom.2022.106406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Lu X, Dang Y, Li M, Zhu C, Liu F, Tang W, Weng J, Ruan M, Suib SL, Gao PX. Synergistic promotion of transition metal ion-exchange in TiO 2 nanoarray-based monolithic catalysts for the selective catalytic reduction of NO x with NH 3. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00996j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The improved performance of the multi-component Cu–Ce–Mn/TNA catalysts over the mono-metallic catalysts demonstrated the synergistic promotion of multi-transition-metal-doped nanoarray catalysts for efficient NO abatement.
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Affiliation(s)
- Xingxu Lu
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT 06269, USA
- Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA
| | - Yanliu Dang
- Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA
| | - Meilin Li
- Department of Chemistry, University of Connecticut, Storrs, CT 06269, USA
| | - Chunxiang Zhu
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT 06269, USA
- Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA
| | - Fangyuan Liu
- Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA
| | - Wenxiang Tang
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT 06269, USA
- Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA
| | - Junfei Weng
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT 06269, USA
- Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA
| | - Mingyue Ruan
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Steven L. Suib
- Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA
- Department of Chemistry, University of Connecticut, Storrs, CT 06269, USA
| | - Pu-Xian Gao
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT 06269, USA
- Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA
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Rajendran S, Inwati GK, Yadav VK, Choudhary N, Solanki MB, Abdellattif MH, Yadav KK, Gupta N, Islam S, Jeon BH. Enriched Catalytic Activity of TiO 2 Nanoparticles Supported by Activated Carbon for Noxious Pollutant Elimination. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:2808. [PMID: 34835573 PMCID: PMC8620053 DOI: 10.3390/nano11112808] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Revised: 10/14/2021] [Accepted: 10/18/2021] [Indexed: 11/16/2022]
Abstract
Cleaning wastewater has become one of the most serious issues for a number of scientists and researchers in recent years, as water is the most basic need for the daily life of humans. There has been a focus on the removal of noxious pollutants from wastewater effluents by using nanocatalysts owing to their unique physicochemical actions and stability. Herein we manufactured TiO2 nanoparticles supported by activated carbon (AC-TiO2) using a cost-effective sonochemical method. The band structures of the AC-TiO2 and TiO2 were modified from 3.2 to 3.1 eV, thus increasing the catalytic activity. The structural, optical and anatase crystal phase properties, with morphological confirmation, were studied by applying UV-DRS, PL, FESEM, XRD, along with HRTEM, respectively. The specific surface area, calculated by BET analysis, was found to be ~241 m2/gm and ~46 m2/gm for AC-TiO2 and TiO2. The degradation efficiency of the as-prepared nanocatalysts against the very toxic but rarely studied organic textile dye pollutant RO 84 was investigated and 97% efficiency were found for the AC-TiO2 as compared to pure TiO2, which is a highly appreciated finding in the catalytic dye degradation application domain. Such surface-modified nanocatalysts could be further implemented for the treatment of wastewaters/waste effluents released from chemical industries, laboratories and other sources.
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Affiliation(s)
- Suriyaprabha Rajendran
- School of Nanosciences, Central University of Gujarat, Gandhinagar 302030, Gujarat, India; (S.R.); (N.C.)
| | - Gajendra Kumar Inwati
- Department of Chemistry, D. P. Chaturvedi College, Rani Durgavati University, Seoni, Jabalpur 480661, Madhya Pradesh, India;
| | - Virendra Kumar Yadav
- Department of Microbiology, School of Sciences, P P Savani University, Kosamba 394125, Gujarat, India;
| | - Nisha Choudhary
- School of Nanosciences, Central University of Gujarat, Gandhinagar 302030, Gujarat, India; (S.R.); (N.C.)
| | - Mitesh B. Solanki
- Step-Up Jewels PVT. Ltd. Khatodara Gate, Surat 395002, Gujarat, India;
| | - Magda H. Abdellattif
- Department of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia;
| | - Krishna Kumar Yadav
- Faculty of Science and Technology, Madhyanchal Professional University, Ratibad, Bhopal 462044, Madhya Pradesh, India;
| | - Neha Gupta
- Institute of Environment and Development Studies, Bundelkhand University, Jhansi 284128, Uttar Pradesh, India;
| | - Saiful Islam
- Civil Engineering Department, College of Engineering, King Khalid University, Abha 61413, Saudi Arabia;
| | - Byong-Hun Jeon
- Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, Korea
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15
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Superhydrophobic self-similar nonwoven-titanate nanostructured materials. J Colloid Interface Sci 2021; 598:93-103. [PMID: 33894618 DOI: 10.1016/j.jcis.2021.03.045] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 03/07/2021] [Accepted: 03/08/2021] [Indexed: 11/22/2022]
Abstract
HYPOTHESIS Self-similarity is a scale-invariant irregularity that can assist in designing a robust superhydrophobic material. A combinatorial design strategy involving self-similarity and dual-length scale can be employed to create a new library of a doubly re-entrant, disordered, and porous network of superhydrophobic materials. Asymmetric wettability can be engineered in nonwoven materials by rendering them with superhydrophobic characteristics on one side. EXPERIMENTS A facile, scalable, and inexpensive spray-coating technique was used to decorate the weakly hydrophobicstearate-treatedtitanate nanowires (TiONWs)over the self-similar nonwoven material. Laser scanning confocal microscopy was employed to image the impalement dynamics in three dimensions. With the aid of X-ray microcomputed tomography analysis, the three-dimensional (3D) nonwoven structural parameters were obtained and analyzed. The underwater superhydrophobic behavior of the prepared samples was investigated. FINDINGS A classic 'lotus effect' has been successfully endowed in self-similar nonwoven-titanate nanostructured materials (SS-Ti-NMs) from a nonwoven material that housed the air pockets in bulk and water repellent TiONWs on the surface. The finer fiber-based SS-Ti-NMs exhibited lower roll-off angles and a thinner layer of water on its surface. An asymmetric wettability and the unusual display of underwater superhydrophobic behavior of SS-Ti-NMs have been uncovered.
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Adeleye AT, John KI, Adeleye PG, Akande AA, Banjoko OO. One-dimensional titanate nanotube materials: heterogeneous solid catalysts for sustainable synthesis of biofuel precursors/value-added chemicals-a review. JOURNAL OF MATERIALS SCIENCE 2021; 56:18391-18416. [PMID: 34511639 PMCID: PMC8418895 DOI: 10.1007/s10853-021-06473-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Accepted: 08/24/2021] [Indexed: 06/13/2023]
Abstract
One-dimensional (1D) titanate nanotubes materials (protonated titanate nanotube (HTNT) and sodium titanate nanotube (NaTNT)) have been reported as low-cost and efficient catalytic materials in chemical syntheses for the production of biofuel precursors with interesting catalytic performance exhibited, even better than some commonly used zeolites, H-MOR, H-β, SO4 2-/Al2O3, and H-ZSM-5 solid catalysts with environmental benign in focus when compared with homogeneous catalytic materials. This mini-review expressly revealed the significance and potential of using HTNT and NaTNT as sustainable and environmentally benign solid catalysts/supports in various chemical reactions. The critical assessment of biomass valorization and titanate nanostructured materials as catalysts/supports via Green Chemistry approach, #7 (use of renewable feedstocks), #9 (use of catalyst against stoichiometry) and United Nations (UN) Sustainable Development Goals (SDGs), #7 (affordable and clean energy; ensure access to inexpensive, reliable, sustainable, and new energy), is presented as integrated pathways to meet environmental benign technology toward sustainability. Hence, this work follows in the pattern of recent formulated features reported for solid catalysts-'PYSSVR' concept, which means P-production cost, Y-yield, S-stability, S-selectivity, V-versatility, and R-reusability. GRAPHICAL ABSTRACT
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Affiliation(s)
- Aderemi Timothy Adeleye
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China
- University of Chinese Academy of Sciences, 19 A Yuquan Road, Shijingshan District, Beijing, 100049 China
- Organization of African Academic Doctor (OAAD), Off Kamiti Road, P. O. Box 25305000100, Nairobi, Kenya
| | - Kingsley I. John
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China
- University of Chinese Academy of Sciences, 19 A Yuquan Road, Shijingshan District, Beijing, 100049 China
- Organization of African Academic Doctor (OAAD), Off Kamiti Road, P. O. Box 25305000100, Nairobi, Kenya
- Lab of Department of Pure and Applied Chemistry, College of Natural Sciences, Veritas University Abuja, PMB 5171, Abuja, Nigeria
| | | | - Amos Adeleke Akande
- CSIR NextGen Enterprises and Institutions Cluster, EDT4IR Research Centre, P O Box 395, Pretoria, 0001 South Africa
- Department of Physics, University of Limpopo, P/Bag X1106, Sovenga, 0727 South Africa
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Gromov VF, Ikim MI, Gerasimov GN, Trakhtenberg LI. Crown Ethers: Selective Sorbents of Radioactive and Heavy Metals. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2021. [DOI: 10.1134/s1990793121010036] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Research Progress on Catalytic Water Splitting Based on Polyoxometalate/Semiconductor Composites. Catalysts 2021. [DOI: 10.3390/catal11040524] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In recent years, due to the impact of global warming, environmental pollution, and the energy crisis, international attention and demand for clean energy are increasing. Hydrogen energy is recognized as one of the clean energy sources. Water is considered as the largest potential supplier of hydrogen energy. However, artificial catalytic water splitting for hydrogen and oxygen evolution has not been widely used due to its high energy consumption and high cost during catalytic cracking. Therefore, the exploitation of photocatalysts, electrocatalysts, and photo-electrocatalysts for rapid, cost effective, and reliable water splitting is essentially needed. Polyoxometalates (POMs) are regarded as the potential candidates for water splitting catalysis. In addition to their excellent catalytic properties and reversibly redox activities, POMs can also modify semiconductors to overcome their shortcomings, and improve photoelectric conversion efficiency and photocatalytic activity, which has attracted more and more attention in the field of photoelectric water splitting catalysis. In this review, we summarize the latest applications of POMs and semiconductor composites in the field of photo-electrocatalysis (PEC) for hydrogen and oxygen evolution by catalytic water splitting in recent years and take the latest applications of POMs and semiconductor composites in photocatalysis for water splitting. In the conclusion section, the challenges and strategies of photocatalytic and PEC water-splitting by POMs and semiconductor composites are discussed.
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Fei X, Wang P, Zhang D, Wang H, Wu Z. Confined Catalysts Application in Environmental Catalysis: Current Research Progress and Future Prospects. ChemCatChem 2021. [DOI: 10.1002/cctc.202001578] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Xiaoqi Fei
- Key Laboratory of Environment Remediation and Ecological Health Ministry of Education College of Environmental & Resources Science Zhejiang University Hangzhou 310058 P.R. China
- Zhejiang Provincial Engineering Research Center of Industrial Boiler & Furnace Flue Gas Pollution Control Hangzhou 310058 P. R. China
| | - Penglu Wang
- International Joint Laboratory of Catalytic Chemistry Department of Chemistry Research Center of Nano Science and Technology College of Sciences Shanghai University Shanghai 200444 P. R. China
| | - Dengsong Zhang
- International Joint Laboratory of Catalytic Chemistry Department of Chemistry Research Center of Nano Science and Technology College of Sciences Shanghai University Shanghai 200444 P. R. China
| | - Haiqiang Wang
- Key Laboratory of Environment Remediation and Ecological Health Ministry of Education College of Environmental & Resources Science Zhejiang University Hangzhou 310058 P.R. China
- Zhejiang Provincial Engineering Research Center of Industrial Boiler & Furnace Flue Gas Pollution Control Hangzhou 310058 P. R. China
| | - Zhongbiao Wu
- Key Laboratory of Environment Remediation and Ecological Health Ministry of Education College of Environmental & Resources Science Zhejiang University Hangzhou 310058 P.R. China
- Zhejiang Provincial Engineering Research Center of Industrial Boiler & Furnace Flue Gas Pollution Control Hangzhou 310058 P. R. China
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Recent Developments in Rh Heterogeneous Catalysts. Catalysts 2021. [DOI: 10.3390/catal11040416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Rh-based catalysts successfully catalyze bond making and bond breaking reactions in most cases [...]
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Liquid-Phase Deposition Synthesis of ZIF-67-Derived Synthesis of Co3O4@TiO2 Composite for Efficient Electrochemical Water Splitting. METALS 2021. [DOI: 10.3390/met11030420] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
In this article, a novel Co3O4@TiO2 composite is synthesized by applying two-step methods. ZIF-67 is synthesized and used as a template for the synthesis of the composite. The composite is designed by using the effective photocatalytic properties of Co3O4 and TiO2. The resulting synthesized composite is supposed to offer superior properties compared to their counterparts. The synthesized Co3O4@TiO2 composite is characterized by powder X-ray diffraction (PXRD), Brunauer–Emmet–Teller (BET), atomic force microscopy (AFM), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Electrochemical water splitting, including hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) studies on the Co3O4@TiO2 composite, is evaluated by cyclic voltammetry (CV) and linear sweep voltammetry (LSV) analysis in a 2M aqueous KOH electrolyte. The current generation stability of these samples is deliberated by chronoamperometric measurements. It is observed, from LSV results at a 1 mV/s scan rate, that metal oxides incorporated on other metal oxides have a higher current density and lower onset potential as compared to pure metal oxides. From the obtained results, it has become evident that synthesized studies on the Co3O4@TiO2 composite possess significant potential for electrochemical water splitting with the lowest onset potential, highest current density, better OER, and HER activity.
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Kim SH, Jeong C. Feasibility of Machine Learning Algorithms for Predicting the Deformation of Anodic Titanium Films by Modulating Anodization Processes. MATERIALS 2021; 14:ma14051089. [PMID: 33652708 PMCID: PMC7956670 DOI: 10.3390/ma14051089] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Revised: 02/20/2021] [Accepted: 02/21/2021] [Indexed: 11/16/2022]
Abstract
This study aims to demonstrate the feasibility of applying eight machine learning algorithms to predict the classification of the surface characteristics of titanium oxide (TiO2) nanostructures with different anodization processes. We produced a total of 100 samples, and we assessed changes inTiO2 nanostructures' thicknesses by performing anodization. We successfully grewTiO2 films with different thicknesses by one-step anodization in ethylene glycol containing NH4F and H2O at applied voltage differences ranging from 10 V to 100 V at various anodization durations. We found that the thicknesses of TiO2 nanostructures are dependent on anodization voltages under time differences. Therefore, we tested the feasibility of applying machine learning algorithms to predict the deformation of TiO2. As the characteristics of TiO2 changed based on the different experimental conditions, we classified its surface pore structure into two categories and four groups. For the classification based on granularity, we assessed layer creation, roughness, pore creation, and pore height. We applied eight machine learning techniques to predict classification for binary and multiclass classification. For binary classification, random forest and gradient boosting algorithm had relatively high performance. However, all eight algorithms had scores higher than 0.93, which signifies high prediction on estimating the presence of pore. In contrast, decision tree and three ensemble methods had a relatively higher performance for multiclass classification, with an accuracy rate greater than 0.79. The weakest algorithm used was k-nearest neighbors for both binary and multiclass classifications. We believe that these results show that we can apply machine learning techniques to predict surface quality improvement, leading to smart manufacturing technology to better control color appearance, super-hydrophobicity, super-hydrophilicity or batter efficiency.
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Affiliation(s)
- Sung-Hee Kim
- Department of Industrial ICT Engineering, Dong-eui University, 176 Eomgwang-ro, Busanjin-gu, Busan 47340, Korea;
| | - Chanyoung Jeong
- Department of Advanced Materials Engineering, Dong-eui University, 176 Eomgwang-ro, Busanjin-gu, Busan 47340, Korea
- Correspondence:
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Tian Y, Cai R, Yue T, Gao Z, Yuan Y, Wang Z. Application of nanostructures as antimicrobials in the control of foodborne pathogen. Crit Rev Food Sci Nutr 2021; 62:3951-3968. [PMID: 33427486 DOI: 10.1080/10408398.2021.1871586] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Foodborne pathogens are the main cause of human foodborne diseases and pose a serious threat to food safety. The control of them has always been a significant issue in food industry. With good biocompatibility and stability, nanomaterials display excellent bactericidal properties against many kinds of bacteria. In this review, the generation and application of nanostructures as antibacterial in the control of foodborne pathogens was summarized. The antibacterial effects of photocatalytic and contact bacteriostatic nanomaterials agents were mainly introduced. The influence factors and mechanisms of nanomaterials on the inactivation of foodborne pathogens were displayed. The photocatalytic nanostructured bacteriostatic agents can produce reactive oxygen species (ROS) and lead to charge transfer, which result in damaging of cell wall and leakage of small molecules under light irradiation. In addition, metals and metal oxide nanoparticles can kill bacterial cells by releasing metal ions, forming ROS and electrostatic interaction with cell membrane. Besides, the synergistic action of nanoparticles with natural antibacterial agents can improve the stability of these agents and their bactericidal performance. These current researches provided a broader idea for the control of microorganisms in food.
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Affiliation(s)
- Yu Tian
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China.,Ministry of Agriculture, Laboratory of Quality & Safety Risk Assessment for Agro-products (YangLing), Yangling, Shaanxi, China.,National Engineering Research Center of Agriculture Integration Test (Yangling), Yangling, Shaanxi, China
| | - Rui Cai
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China.,Ministry of Agriculture, Laboratory of Quality & Safety Risk Assessment for Agro-products (YangLing), Yangling, Shaanxi, China.,National Engineering Research Center of Agriculture Integration Test (Yangling), Yangling, Shaanxi, China
| | - Tianli Yue
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China.,Ministry of Agriculture, Laboratory of Quality & Safety Risk Assessment for Agro-products (YangLing), Yangling, Shaanxi, China.,National Engineering Research Center of Agriculture Integration Test (Yangling), Yangling, Shaanxi, China
| | - Zhenpeng Gao
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China.,Ministry of Agriculture, Laboratory of Quality & Safety Risk Assessment for Agro-products (YangLing), Yangling, Shaanxi, China.,National Engineering Research Center of Agriculture Integration Test (Yangling), Yangling, Shaanxi, China
| | - Yahong Yuan
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China.,Ministry of Agriculture, Laboratory of Quality & Safety Risk Assessment for Agro-products (YangLing), Yangling, Shaanxi, China.,National Engineering Research Center of Agriculture Integration Test (Yangling), Yangling, Shaanxi, China
| | - Zhouli Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China.,Ministry of Agriculture, Laboratory of Quality & Safety Risk Assessment for Agro-products (YangLing), Yangling, Shaanxi, China.,National Engineering Research Center of Agriculture Integration Test (Yangling), Yangling, Shaanxi, China
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Photocatalytic Applications of Metal Oxides for Sustainable Environmental Remediation. METALS 2021. [DOI: 10.3390/met11010080] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Along with industrialization and rapid urbanization, environmental remediation is globally a perpetual concept to deliver a sustainable environment. Various organic and inorganic wastes from industries and domestic homes are released into water systems. These wastes carry contaminants with detrimental effects on the environment. Consequently, there is an urgent need for an appropriate wastewater treatment technology for the effective decontamination of our water systems. One promising approach is employing nanoparticles of metal oxides as photocatalysts for the degradation of these water pollutants. Transition metal oxides and their composites exhibit excellent photocatalytic activities and along show favorable characteristics like non-toxicity and stability that also make them useful in a wide range of applications. This study discusses some characteristics of metal oxides and briefly outlined their various applications. It focuses on the metal oxides TiO2, ZnO, WO3, CuO, and Cu2O, which are the most common and recognized to be cost-effective, stable, efficient, and most of all, environmentally friendly for a sustainable approach for environmental remediation. Meanwhile, this study highlights the photocatalytic activities of these metal oxides, recent developments, challenges, and modifications made on these metal oxides to overcome their limitations and maximize their performance in the photodegradation of pollutants.
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Zhang M, Long H, Liu Q, Sun L, Qi C. Synthesis of stable and highly efficient Au@ZIF-8 for selective hydrogenation of nitrophenol. NANOTECHNOLOGY 2020; 31:485707. [PMID: 32931473 DOI: 10.1088/1361-6528/abb104] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A series of nanoparticles (NPs) with different Au content was successfully encapsulated into metal organic framework ZIF-8 with highly porous structure through room-temperature crystallization. X-ray diffraction, Fourier transform infrared spectroscopy, N2 adsorption and transmission electron microscopy were carried out to characterize the obtained Au@ZIF-8 heterogeneous catalytic material comprehensively. Au NPs were dispersed uniformly in the ZIF-8 and the Au NP diameter was 5-6 nm. The crystal structure of ZIF-8 was unchanged when compared with that before Au loading. It was found that the Au content plays an important role in the hydrogenation reaction. The obtained Au@ZIF-8 exhibited high hydrogenation activity to nitrophenol and excellent selectivity to aminophenol. The recyclability of the Au@ZIF-8 catalysts showed excellent catalytic performance and great stability in the recycling reaction.
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Affiliation(s)
- Miao Zhang
- Shandong Applied Research Center of Nanogold Technology (Au-SDARC), School of Chemistry & Chemical Engineering, Yantai University, Yantai 264005, People's Republic of China
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Sang NX, Minh VC. Thermal annealing-induced self-junction of hydrothermal titanate nanotubes/TiO 2 nanoparticles with enhanced photocatalytic activity. NANOTECHNOLOGY 2020; 31:435703. [PMID: 32668424 DOI: 10.1088/1361-6528/aba65c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
This work investigates the effect of thermal annealing on the crystalline structure and optical properties of hydrothermal titanate nanotubes (TNTs). It shows that subjecting TNTs to air at 400 °C can be used to form a junction between TNTs and TiO2 nanoparticles. Furthermore, the TNT microstructure is transformed from monoclinic to anatase phase by the annealing process. As a result of the self-junction formation, the visible photocatalytic activity in the degradation of methylene blue is enhanced in the thermal annealed sample in which the pseudo-first-order model fits well with the kinetic reaction rates of the TNTs and thermal TNTs with values of 0.0034 and 0.0082 min-1, respectively. Insights into the improvement in photocatalytic activity are revealed by ultraviolet-visible diffuse reflectance and photoluminescence emission spectroscopies.
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Affiliation(s)
- Nguyen Xuan Sang
- Department of Electronics and Telecommunication, Saigon University, 273 An Duong Vuong, ward 3, district 5, Ho Chi Minh city 700000, Vietnam
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Synthesizing CuO/CeO 2/ZnO Ternary Nano-Photocatalyst with Highly Effective Utilization of Photo-Excited Carriers under Sunlight. NANOMATERIALS 2020; 10:nano10101946. [PMID: 33003531 PMCID: PMC7601881 DOI: 10.3390/nano10101946] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 09/24/2020] [Accepted: 09/25/2020] [Indexed: 01/10/2023]
Abstract
The construction of heterostructured photocatalyst with an appropriate energy band structure will help realize highly efficient photo-excited charge separation. In this study, ternary CuO/CeO2/ZnO nano-particle (NP) composites were synthesized by a facile two-step sol-gel method, which exhibit significantly enhanced photocatalytic degradation performance for various organic pollutants under UV and visible light excitation. The photo-responses to both UV and visible light, as well as the visible light absorption and utilization rates of ZnO are found to be synergistically intensified by CeO2 and CuO co-coupling. The first-order kinetic constants (K) of 3%CuO/CeO2/ZnO for methylene blue (MB) degradation are ~3.9, ~4.1 and ~4.8 times higher than ZnO under UV light, visible light and simulated sunlight illumination, respectively. The roles of CuO and CeO2 in optical properties and photo-degradation under UV and visible light were explored. Besides, the photogenic holes (h+) of ZnO, CeO2, and the produced hydroxyl radicals (·OH) are proved to be the main active species under UV light. Dissimilarly, under visible light, the superoxide radicals (·O2−) formed by the reactions between oxygen molecules and the photo-generated electrons (e−) of CuO moving towards the catalysts surface are also found to be important for promoting dye decomposition. The improved photo-responses, the well-matched band structure that facilitates charge transfer processes, and the highly efficient utilization of the photo-excited carriers of the ternary nano-heterostructure are suggested to be the key factors for the remarkable enhancement of photocatalytic performance of ZnO nano-photocatalyst. This work offers a low-cost strategy to acquire highly active UV and visible light-driven photocatalyst.
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Treatment of Produced Water with Photocatalysis: Recent Advances, Affecting Factors and Future Research Prospects. Catalysts 2020. [DOI: 10.3390/catal10080924] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Produced water is the largest byproduct of oil and gas production. Due to the complexity of produced water, especially dissolved petroleum hydrocarbons and high salinity, efficient water treatment technologies are required prior to beneficial use of such waste streams. Photocatalysis has been demonstrated to be effective at degrading recalcitrant organic contaminants, however, there is limited understanding about its application to treating produced water that has a complex and highly variable water composition. Therefore, the determination of the appropriate photocatalysis technique and the operating parameters are critical to achieve the maximum removal of recalcitrant compounds at the lowest cost. The objective of this review is to examine the feasibility of photocatalysis-involved treatment for the removal of contaminants in produced water. Recent studies revealed that photocatalysis was effective at decomposing recalcitrant organic compounds but not for mineralization. The factors affecting decontamination and strategies to improve photocatalysis efficiency are discussed. Further, recent developments and future research prospects on photocatalysis-derived systems for produced water treatment are addressed. Photocatalysis is proposed to be combined with other treatment processes, such as biological treatments, to partially reduce total organic carbon, break down macromolecular organic compounds, increase biodegradability, and reduce the toxicity of produced water.
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Abstract
Formic acid (FA) can be considered both a CO and a H2 carrier via selective dehydration and dehydrogenation pathways, respectively. The two processes can be influenced by the modification of the active components of the catalysts used. In the present study the adsorption of FA and the decomposition of the formed formate intermediate were investigated on potassium promoted Rh(111) surfaces. The preadsorbed potassium markedly increased the uptake of FA at 300 K, and influenced the decomposition of formate depending on the potassium coverage. The work function (Δϕ) is increased by the adsorption of FA on K/Rh(111) at 300 K suggesting a large negative charge on the chemisorbed molecule, which could be probably due to the enhanced back-donation of electrons from the K-promoted Rh into an empty π orbital of HCOOH. The binding energy of the formate species is therefore increased resulting in a greater concentration of irreversibly adsorbed formate species. Decomposition of the formate species led to the formation of H2, CO2, H2O, and CO, which desorbed at significantly higher temperatures from the K-promoted surface than from the K-free one as it was proven by thermal desorption studies. Transformation of surface formate to carbonate (evidenced by UPS) and its decomposition and desorption is responsible for the high temperature CO and CO2 formation.
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Sato M, Hara M, Funatsu A, Nouchi R. Tolerance against conducting filament formation in nanosheet-derived titania thin films. NANO EXPRESS 2020. [DOI: 10.1088/2632-959x/ab9024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Abstract
Herein, titania thin films are fabricated by a facile liquid-phase method based on vacuum filtration of a colloidal suspension of titania nanosheets, which is followed by thermal annealing to transform the nanosheet film into anatase TiO2. Nanosheet-derived titania thin films exhibit poor resistive switching with an interface-type mechanism. This behaviour is distinct from the filamentary switching that has been observed with titania thin films fabricated by other conventional techniques. This tolerance against conducting-filament formation may be ascribed to a low concentration of oxygen vacancies in nanosheet-derived films, which is expected because of the O/Ti ratio of titania (Ti0.87O2) nanosheets being larger than that of TiO2. Besides, the dielectric breakdown strength of nanosheet-derived films is found to be comparable to or higher than that of titania thin films fabricated by other techniques. These findings clearly indicate the usefulness of nanosheet-derived titania thin films for dielectric applications.
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Zheng M, Ji H, Duan J, Dang C, Chen X, Liu W. Efficient adsorption of europium (III) and uranium (VI) by titanate nanorings: Insights into radioactive metal species. ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY 2020; 2:100031. [PMID: 36160918 PMCID: PMC9488033 DOI: 10.1016/j.ese.2020.100031] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 04/23/2020] [Accepted: 04/24/2020] [Indexed: 06/12/2023]
Abstract
Radioactive wastewater containing high concentration of radionuclides poses severe threats to ecosystem and human health, so efficient removal of these toxic heavy metals is urgently needed. Titanate nanomaterials have been demonstrated good adsorbents for heavy metals due to ion exchange property. In this study, titanate nanorings (TNRs) were synthesized using the facile hydrothermal-cooling method. The TNRs were composed of sodium trititanate, with a chemical formula of Na0.66H1.34Ti3O7•0.27H2O and a Na content of 2.38 mmol/g. The TNRs demonstrated sufficient adsorption performance to radionuclides europium (Eu) and uranium (U) ions. Specifically, even at a high initial concentration of 50 mg/L, 86.5% and 92.6% of the two metal ions can be rapidly adsorbed by the TNRs within 5 min, and equilibrium was reached within 60 min at pH 5. The maximum adsorption capacity (Q max) obtained by the Langmuir isotherm model was 115.3 mg/g for Eu(III) and 282.5 mg/g for uranium U(VI) at pH 5, respectively. The adsorption capacities of the two metals under various water chemical conditions were highly related to their species. Ion exchange between metal cations and Na+ in the TNR interlayers was the dominant adsorption mechanism, and adsorption of U(VI) was more complicated because of the co-existence of various uranyl (UO2 2+) and uranyl-hydroxyl species. The spent TNRs were effectively regenerated through an acid-base or ethylenediamine tetraacetic acid (EDTA) treatment and reused. Considering the large adsorption capacity and quick kinetic, TNRs are promising materials to remove radionuclides in environmental purification applications, especially emergent treatment of leaked radionuclides.
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Affiliation(s)
- Maosheng Zheng
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China
- The Key Laboratory of Resources and Environmental Systems Optimization, Ministry of Education, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, China
| | - Haodong Ji
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China
- The Beijing Innovation Center for Engineering Science and Advanced Technology (BIC-ESAT), Peking University, Beijing, 100871, China
- Beijing Engineering Research Center for Advanced Wastewater Treatment, Department of Environmental Engineering, Peking University, Beijing, 100871, China
| | - Jun Duan
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China
| | - Chenyuan Dang
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China
| | - Xingmin Chen
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - Wen Liu
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China
- The Beijing Innovation Center for Engineering Science and Advanced Technology (BIC-ESAT), Peking University, Beijing, 100871, China
- Beijing Engineering Research Center for Advanced Wastewater Treatment, Department of Environmental Engineering, Peking University, Beijing, 100871, China
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34
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Rh-induced Support Transformation and Rh Incorporation in Titanate Structures and Their Influence on Catalytic Activity. Catalysts 2020. [DOI: 10.3390/catal10020212] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Rh is one of the most effective metals in several technologically important heterogeneous catalytic reactions, like the hydrogenation of CO2, and CO, the CO+H2O reaction, and methane and ethanol transformations. Titania and titanates are among the most frequently studied supports for Rh nanoparticles. The present study demonstrates that the nature of the support has a marked influence on the specific activity. For comparison, the catalytic activity of TiO2 P25 is also presented. It is pointed out that a certain amount of Rh can be stabilized as cation (Rh+) in ion-exchange positions (i.e., in atomic scale distribution) of the titanate framework. This ionic form does not exists on TiO2. We pay distinguished attention not only to the electronic interaction between Rh metal and the titania/titanate support, but also to the Rh-induced phase transitions of one-dimensional titanate nanowires (TiONW) and nanotubes (TiONT). Support transformation phenomena can be observed in Rh-loaded titanates. Rh decorated nanowires transform into the TiO2(B) phase, whereas their pristine counterparts recrystallize into anatase. The formation of anatase is dominant during the thermal annealing process in both acid-treated and Rh-decorated nanotubes; Rh catalysis this transformation. We demonstrate that the phase transformations and the formation of Rh nanoclusters and incorporated Rh ions affect the conversion and the selectivity of the reactions. The following initial activity order was found in the CO2 + H2, CO + H2O and C2H5OH decomposition reactions: Rh/TiO2 (Degussa P25) ≥ Rh/TiONW > Rh/TiONT. On the other hand it is remarkable that the hydrogen selectivity in ethanol decomposition was two times higher on Rh/TiONW and Rh/TiO(NT) catalysts than on Rh/TiO2 due to the presence of Rh+ cations incorporated into the framework of the titanate structures.
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35
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Alban L, Monteiro WF, Diz FM, Miranda GM, Scheid CM, Zotti ER, Morrone FB, Ligabue R. New quercetin-coated titanate nanotubes and their radiosensitization effect on human bladder cancer. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 110:110662. [PMID: 32204090 DOI: 10.1016/j.msec.2020.110662] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 12/26/2019] [Accepted: 01/13/2020] [Indexed: 02/07/2023]
Abstract
Interest in nanostructures such as titanate nanotubes (TNT) has grown notably in recent years due to their biocompatibility and economic viability, making them promising for application in the biomedical field. Quercetin (Qc) has shown great potential as a chemopreventive agent and has been widely studied for the treatment of diseases such as bladder cancer. Motivated by the possibilities of developing a new hybrid nanostructure with potential in biomedical applications, this study aimed to investigate the incorporation of quercetin in sodium (NaTNT) and zinc (ZnTNT) titanate nanotubes, and characterize the nanostructures formed. Qc release testing was also performed and cytotoxicity in Vero and T24 cell lines evaluated by the MTT assay. The effect of TNTs on T24 bladder cancer cell radiosensitivity was also assessed, using cell proliferation and a clonogenic assay. The TNT nanostructures were synthesized and characterized by FESEM, EDS, TEM, FTIR, XRD and TGA. The results showed that the nanostructures have a tubular structure and that the exchange of Na+ ions for Zn2+ and incorporation of quercetin did not alter this morphology. In addition, interaction between Zn and Qc increased the thermal stability of the nanostructures. The release test showed that maximum Qc delivery occurred after 24 h and the presence of Zn controlled its release. Biological assays indicated that the NaTNTQc and ZnTNTQc nanostructures decreased the viability of T24 cells after 48 h at high concentrations. Furthermore, the clonogenic assay showed that NaTNT, NaTNTQc, ZnTNT and ZnTNTQc combined with 5 Gy reduced the formation of polyclonal colonies of T24 cells after 48 h. The results suggest that the nanostructures synthesized in this study interfere in cell proliferation and can therefore be a powerful tool in the treatment of bladder cancer.
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Affiliation(s)
- Luisa Alban
- Graduate Program in Materials Engineering and Technology, Pontifical Catholic University of Rio Grande do Sul - PUCRS, Brazil
| | - Wesley Formentin Monteiro
- Graduate Program in Materials Engineering and Technology, Pontifical Catholic University of Rio Grande do Sul - PUCRS, Brazil
| | - Fernando Mendonça Diz
- Graduate Program in Materials Engineering and Technology, Pontifical Catholic University of Rio Grande do Sul - PUCRS, Brazil
| | - Gabriela Messias Miranda
- Graduate Program in Materials Engineering and Technology, Pontifical Catholic University of Rio Grande do Sul - PUCRS, Brazil
| | - Carolina Majolo Scheid
- Graduate Program in Materials Engineering and Technology, Pontifical Catholic University of Rio Grande do Sul - PUCRS, Brazil
| | - Eduardo Rosa Zotti
- School of Technology, Pontifical Catholic University of Rio Grande do Sul - PUCRS, Brazil
| | - Fernanda Bueno Morrone
- School of Health Sciences, Pontifical Catholic University of Rio Grande do Sul - PUCRS, Brazil
| | - Rosane Ligabue
- Graduate Program in Materials Engineering and Technology, Pontifical Catholic University of Rio Grande do Sul - PUCRS, Brazil; School of Sciences, Pontifical Catholic University of Rio Grande do Sul - PUCRS, Brazil.
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36
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Díaz de León JN, Rodríguez JR, Rojas J, Esqueda-Barrón Y, Cardenas L, Ramesh Kumar C, Alonso-Nuñez G, Fuentes-Moyado S. New Insight on the Formation of Sodium Titanates 1D Nanostructures and Its Application on CO 2 Hydrogenation. Front Chem 2019; 7:750. [PMID: 31781539 PMCID: PMC6856218 DOI: 10.3389/fchem.2019.00750] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 10/21/2019] [Indexed: 11/13/2022] Open
Abstract
The aim of this work is focused on the study of a series of non-traditional catalytic nanomaterials to transform greenhouse CO2 gas into added-value products. We found encouraging results of CO2 hydrogenation activity over sodium titanates with different morphologies. The yield to methanol increases with the increase in the Na incorporated in the nanostructures confirming the proposed mechanism. Samples were prepared at different times of hydrothermal treatment (HTT) with NaOH solutions, and these materials were labeled as Ti-nR-x with x as the hours on the HTT. HRTEM initially showed sphere-shaped nanoparticles in the TiO2 commercial nanopowder, increasing the HTT resulted in morphological changes in which the structures passed from nanosheets and finally to nanorods after 30 h. The X-ray diffraction and Raman spectroscopy results indicated the formation of sodium titanates such as Na2Ti3O7 with short Ti-O bonds and that Na begins to be incorporated into the distorted TiO6 crystalline structure after 5 h of HTT (until 12 wt%). The crystalline and shape transformation resulted in a significant modification on the textural properties passing from 51 m2.g−1 to 150 m2.g−1 and from a pore volume of 0.12 cm3.g−1 to 1.03 cm3.g−1 for Ti-ref and Ti-nR-30 respectively. We also observed differences in the electronic properties as the bandgap presented a blue shift from 3.16 eV on the TiO2 reference nano-powder to 3.44 eV for the Ti-nR-30 calcined sample. This fact coincides with the presence of a more electron-rich state of the Ti4+ and the formation of negative charge layer induced by the presence of Na+ interlayer cations detected by XPS analysis, at the same this helped us to explain the catalytic activity results.
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Affiliation(s)
- J Noé Díaz de León
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada, Mexico
| | - Jassiel R Rodríguez
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada, Mexico
| | - Joel Rojas
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada, Mexico
| | - Yasmin Esqueda-Barrón
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada, Mexico
| | - Luis Cardenas
- Institut de Recherches sur la Catalyse et l'Environnement de Lyon - IRCELYON - UMR 5256, CNRS-UCB Lyon 1, Université de Lyon, Lyon, France
| | - Chowdari Ramesh Kumar
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada, Mexico
| | - Gabriel Alonso-Nuñez
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada, Mexico
| | - Sergio Fuentes-Moyado
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada, Mexico
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37
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Effect of gold and iron nanoparticles on photocatalytic behaviour of titanium dioxide towards 1-butyl-3-methylimidazolium chloride ionic liquid. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111277] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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38
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Khawaji M, Chadwick D. Selective catalytic oxidation over Au-Pd/titanate nanotubes and the influence of the catalyst preparation method on the activity. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.11.080] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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39
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Sápi A, Rajkumar T, Ábel M, Efremova A, Grósz A, Gyuris A, Ábrahámné KB, Szenti I, Kiss J, Varga T, Kukovecz Á, Kónya Z. Noble-metal-free and Pt nanoparticles-loaded, mesoporous oxides as efficient catalysts for CO2 hydrogenation and dry reforming with methane. J CO2 UTIL 2019. [DOI: 10.1016/j.jcou.2019.04.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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40
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Lu X, Tang W, Du S, Wen L, Weng J, Ding Y, Willis WS, Suib SL, Gao PX. Ion-Exchange Loading Promoted Stability of Platinum Catalysts Supported on Layered Protonated Titanate-Derived Titania Nanoarrays. ACS APPLIED MATERIALS & INTERFACES 2019; 11:21515-21525. [PMID: 31132239 DOI: 10.1021/acsami.9b04378] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Supported metal catalysts are one of the major classes of heterogeneous catalysts, which demand good stability in both the supports and catalysts. Herein, layered protonated titanate-derived TiO2 (LPT-TiO2) nanowire arrays were synthesized to support platinum catalysts using different loading processes. The Pt ion-exchange loading on pristine LPTs followed by thermal annealing resulted in superior Pt catalysts supported on the LPT-TiO2 nanoarrays with excellent hydrothermal stability and catalytic performance toward CO and NO oxidations as compared to the Pt catalysts through wet-impregnation on the anatase TiO2 (ANT-TiO2) nanoarrays resulted from thermal annealing of LPT nanoarrays. Both loading processes resulted in highly dispersed Pt nanoparticles (NPs) with average sizes smaller than 1 nm at their pristine states. However, after hydrothermal aging at 800 °C for 50 h, highly dispersed Pt NPs were only retained on the ion-exchanged LPT-TiO2 nanoarrays with the support structure consisting of a mixture of 74% anatase and 26% rutile TiO2. For the wet-impregnation loading directly on anatase TiO2 nanoarrays derived from LPT, the Pt catalysts experienced severe agglomeration after hydrothermal aging, with the nanoarray supports consisting of 86% anatase and 14% rutile TiO2. Spectroscopy analysis suggested that Pt2+ cations intercalated into the interlayers of the titanate frameworks through ion-exchange impregnation procedure, which altered the chemical and electronic structures of the catalysts, resulting in the shifts of the electronic binding energy, Raman bands, and optical energy bandgap. The ion-exchangeable nature of LPT nanoarrays clearly provides a structural modification in Pt-doped LPT that has resulted in a strong interaction between the Pt catalysts and LPT-TiO2 nanoarray supports, leading to the enhanced hydrothermal stability of the catalysts. Considering the wide applications of the LPT and TiO2 nanomaterials as supports for catalysts, this finding provides a new pathway to design highly stable supported metal catalysts for different reactions.
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Affiliation(s)
| | | | | | | | | | - Yong Ding
- School of Materials Science and Engineering , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States
| | - William S Willis
- Department of Chemistry , University of Connecticut , Storrs , Connecticut 06269-3060 , United States
| | - Steven L Suib
- Department of Chemistry , University of Connecticut , Storrs , Connecticut 06269-3060 , United States
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41
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Wang X, Liu W, Fu H, Yi XH, Wang P, Zhao C, Wang CC, Zheng W. Simultaneous Cr(VI) reduction and Cr(III) removal of bifunctional MOF/Titanate nanotube composites. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 249:502-511. [PMID: 30928522 DOI: 10.1016/j.envpol.2019.03.096] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 03/13/2019] [Accepted: 03/23/2019] [Indexed: 06/09/2023]
Abstract
In this study, a series of BUC-21/titanate nanotube (BT-X) composites were facilely fabricated via ball-milling of 2-dimensional (2D) metal-organic framework (MOF) BUC-21 and titanate nanotubes (TNTs). The BT-X composites were characterized by powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), UV-visible diffuse-reflectance spectroscopy (UV-vis DRS), X-ray photoelectron spectrometer (XPS) and high resolution transmission electron microscopy (HRTEM). Both the photocatalytic reduction from Cr(VI) to Cr(III) and adsorptive removal of formed Cr(III) of BT-X composites were systematically investigated under different conditions including pH values and co-existing inorganic ions. It was found that BUC-21 (100 mg)/TNTs (100 mg) (BT-1) composites demonstrate remarkable ability of photocatalytic Cr(VI) reduction and adsorptive Cr(III) removal, as well as good reusability and stability. It is believed that the introduction of TNTs could capture the formed Cr(III) from the surface of BUC-21, which provided more active sites exposed to enhance the Cr(VI) reduction.
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Affiliation(s)
- Xun Wang
- Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation/Beijing Advanced Innovation Centre for Future Urban Design, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
| | - Wen Liu
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, College of Environment Sciences and Engineering, Peking University, Beijing 100871, China
| | - Huifen Fu
- Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation/Beijing Advanced Innovation Centre for Future Urban Design, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
| | - Xiao-Hong Yi
- Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation/Beijing Advanced Innovation Centre for Future Urban Design, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
| | - Peng Wang
- Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation/Beijing Advanced Innovation Centre for Future Urban Design, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
| | - Chen Zhao
- Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation/Beijing Advanced Innovation Centre for Future Urban Design, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
| | - Chong-Chen Wang
- Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation/Beijing Advanced Innovation Centre for Future Urban Design, Beijing University of Civil Engineering and Architecture, Beijing 100044, China.
| | - Weiwei Zheng
- Department of Chemistry, Syracuse University, Syracuse, NY 13244, United States
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42
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Chauhan N, Singh V, Kumar S, Kumari M, Sirohi K. Synthesis of nitrogen & palladium co-doped mesoporous titanium dioxide nanoparticles via evaporation induced self assembly method and study of their photocatalytic properties. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.02.055] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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43
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Influence of Preparation Procedure on Physicochemical and Antibacterial Properties of Titanate Nanotubes Modified with Silver. NANOMATERIALS 2019; 9:nano9050795. [PMID: 31126162 PMCID: PMC6566197 DOI: 10.3390/nano9050795] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 05/18/2019] [Accepted: 05/20/2019] [Indexed: 12/26/2022]
Abstract
Silver nanoparticles (NPs) are effective antibacterial agents; however, aggregation of NPs and uncontrolled release of Ag+ affect their efficiency and may pose a risk to the environment. To overcome these disadvantages, immobilization of Ag onto titanate nanotubes (TNTs) was investigated. This paper describes the physicochemical and antibacterial properties of silver incorporated titanate nanotubes (Ag/TNTs) prepared using five procedures and containing different Ag amounts (0.11-30.85 wt.%). The methods were (i) sol-gel followed by a hydrothermal process; (ii) photodeposition under ambient conditions; (iii) photodeposition under an inert atmosphere; (iv) NaBH4 reduction; and (v) electroless deposition after activation of TNTs with Sn2+. Depending on the synthesis procedure, the presence of metallic Ag NPs, AgO or AgCl was observed. The electroless method led to an additional deposition of SnO2 NPs. The antibacterial properties of Ag/TNTs were analyzed as a function of Ag content and released against Escherichia coli and Staphylococcus epidermidis. The best bactericidal properties exhibited Ag/TNTs prepared through the photodeposition process due to the higher interaction of exposed Ag NPs with bacteria. An increase of Ag loading resulted in improvement of antibacterial activity of Ag/TNTs although no direct correlation between silver content or release and inhibition of bacterial growth was found.
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44
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45
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Sharma N, Chaudhary M, Butola BS, Jeyabalaji JK, Pathak DP, Sharma RK. Preparation, characterization and evaluation of the zinc titanate and silver nitrate incorporated wipes for topical chemical and biological decontamination. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 96:183-196. [DOI: 10.1016/j.msec.2018.10.056] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 08/27/2018] [Accepted: 10/15/2018] [Indexed: 01/12/2023]
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46
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Schneid AC, Quevedo AB, Pereira MB, Araújo PF, Franco N, Machado G, Moro CC, de Menezes EW, Costa TMH, Benvenutti EV. New strategy to obtain high surface area anatase nanotube/AuNP photocatalyst. NANOTECHNOLOGY 2019; 30:065604. [PMID: 30523846 DOI: 10.1088/1361-6528/aaf17e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Anatase nanotubes with high surface area (ca. 350 m2 g-1), containing gold nanoparticles, were successfully obtained from trititanate nanotubes, prepared by a template-free hydrothermal method, and calcined at 450 °C. The high surface area and tubular morphology were attained due to the presence of ionic silsesquioxane, which acts as anti-sintering agent for titania during calcination process, by forming a thin silica coating between anatase nanotubes. Additionally, the ionic silsesquioxane also acts as stabilizing and adhesion agent for gold nanoparticles on the surface of anatase nanotubes. The influence of the ionic silsesquioxane on the morphological and textural properties of anatase nanotubes was studied in three different moments during the synthesis: before, after and before/after nanotubes were rolled up. The photocatalytic activity of the nanotube samples was evaluated by hydrogen generation showing remarkable enhancement in hydrogen production and stability of catalyst when compare with the bare anatase sample and commercial P-25.
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Affiliation(s)
- Andressa C Schneid
- LSS, Laboratory of Solids and Surfaces, Instituto de Química, UFRGS, CEP 91501-970, Porto Alegre, RS, Brazil
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47
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MARQUES THALLESM, MORAIS REINALDON, NOBRE FRANCISCOX, ROCHA JARDELM, GHOSH ANUPAMA, SOARES THIAGOANDRÉS, VIANA BARTOLOMEUC, MACHADO GIOVANNA, COSTA JEANCLAUDIOS, MATOS JOSÉMDE. Hydrogen production from aqueous glycerol using titanate nanotubes decorated with Au nanoparticles as photocatalysts. AN ACAD BRAS CIENC 2019. [DOI: 10.1590/0001-3765201920190082] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
| | | | | | | | | | | | - BARTOLOMEU C. VIANA
- Universidade Federal do Piauí, Brazil; Universidade Federal do Piauí, Brazil
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48
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Bahadori E, Tripodi A, Villa A, Pirola C, Prati L, Ramis G, Dimitratos N, Wang D, Rossetti I. High pressure CO2 photoreduction using Au/TiO2: unravelling the effect of co-catalysts and of titania polymorphs. Catal Sci Technol 2019. [DOI: 10.1039/c9cy00286c] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A series of Au/TiO2 based catalysts with low gold loading (0.1–0.5 wt%) were prepared by a modified deposition–precipitation method and their activity was tested for CO2 photoreduction in the liquid phase at high pressure (7 bar).
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Affiliation(s)
- Elnaz Bahadori
- Dip. Chimica
- Università degli Studi di Milano
- INSTM Unit Milano-Università
- and CNR-ISTM
- I-20133 Milano
| | - Antonio Tripodi
- Dip. Chimica
- Università degli Studi di Milano
- INSTM Unit Milano-Università
- and CNR-ISTM
- I-20133 Milano
| | - Alberto Villa
- Dip. Chimica
- Università degli Studi di Milano
- INSTM Unit Milano-Università
- and CNR-ISTM
- I-20133 Milano
| | - Carlo Pirola
- Dip. Chimica
- Università degli Studi di Milano
- INSTM Unit Milano-Università
- and CNR-ISTM
- I-20133 Milano
| | - Laura Prati
- Dip. Chimica
- Università degli Studi di Milano
- INSTM Unit Milano-Università
- and CNR-ISTM
- I-20133 Milano
| | - Gianguido Ramis
- Dip. di Ingegneria Civile, Chimica e Ambientale
- Università degli Studi di Genova
- and INSTM Unit Genova
- Genoa
- Italy
| | | | - Di Wang
- Institute of Nanotechnology and Karlsruhe Nano Micro Facility (KNMF)
- Karlsruhe Institute of Technology
- 76344 Eggenstein-Leopoldshafen
- Germany
| | - Ilenia Rossetti
- Dip. Chimica
- Università degli Studi di Milano
- INSTM Unit Milano-Università
- and CNR-ISTM
- I-20133 Milano
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49
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Zhang L, Liu S, Wang Y, Zhang H, Liang F. Controllable Synthesis and Catalytic Performance of Gold Nanoparticles with Cucurbit[ n]urils ( n = 5⁻ 8). NANOMATERIALS (BASEL, SWITZERLAND) 2018; 8:E1015. [PMID: 30563230 PMCID: PMC6316165 DOI: 10.3390/nano8121015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 12/01/2018] [Accepted: 12/02/2018] [Indexed: 12/12/2022]
Abstract
A series of gold nanoparticles (AuNPs) was prepared in situ with different cucurbit[n]urils (CB[n]s) in an alkaline aqueous solution. The nanoparticle sizes can be well controlled by CB[n]s (n = 5, 6, 7, 8) with different ring sizes. The packing densities of CB[5⁻8] and free surface area on AuNPs were determined. A direct relationship was found between the ring size and packing density of CB[n]s with respect to the AuNP-catalyzed reduction of 4-nitrophenol in the presence of NaBH₄. The larger particle size and higher surface coverage of bigger CB[n]-capped AuNPs significantly decreased the catalytic activity. Furthermore, this work could lead to new applications that utilize AuNPs under an overlayer of CB[n]s for catalysis, sensing, and drug delivery.
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Affiliation(s)
- Liangfeng Zhang
- The State Key Laboratory of Refractories and Metallurgy, Coal Conversion and New Carbon Materials Hubei Key Laboratory, Hubei Province Key Laboratory of Science in Metallurgical Process, School of Chemistry & Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China.
| | - Simin Liu
- The State Key Laboratory of Refractories and Metallurgy, Coal Conversion and New Carbon Materials Hubei Key Laboratory, Hubei Province Key Laboratory of Science in Metallurgical Process, School of Chemistry & Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China.
| | - Yuhua Wang
- The State Key Laboratory of Refractories and Metallurgy, Coal Conversion and New Carbon Materials Hubei Key Laboratory, Hubei Province Key Laboratory of Science in Metallurgical Process, School of Chemistry & Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China.
| | - Haijun Zhang
- The State Key Laboratory of Refractories and Metallurgy, Coal Conversion and New Carbon Materials Hubei Key Laboratory, Hubei Province Key Laboratory of Science in Metallurgical Process, School of Chemistry & Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China.
| | - Feng Liang
- The State Key Laboratory of Refractories and Metallurgy, Coal Conversion and New Carbon Materials Hubei Key Laboratory, Hubei Province Key Laboratory of Science in Metallurgical Process, School of Chemistry & Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China.
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50
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Titania Nanotube Derived Titanium Nitride Nano-cluster for Visible Light Driven Water Splitting. Catal Letters 2018. [DOI: 10.1007/s10562-018-2614-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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