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Casteleiro B, Rocha M, Sousa AR, Pereira AM, Martinho JMG, Pereira C, Farinha JPS. Multifunctional Nanoparticles with Superparamagnetic Mn(II) Ferrite and Luminescent Gold Nanoclusters for Multimodal Imaging. Polymers (Basel) 2023; 15:4392. [PMID: 38006116 PMCID: PMC10674285 DOI: 10.3390/polym15224392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 10/27/2023] [Accepted: 10/31/2023] [Indexed: 11/26/2023] Open
Abstract
Gold nanoclusters (AuNCs) with fluorescence in the Near Infrared (NIR) by both one- and two-photon electronic excitation were incorporated in mesoporous silica nanoparticles (MSNs) using a novel one-pot synthesis procedure where the condensation polymerization of alkoxysilane monomers in the presence of the AuNCs and a surfactant produced hybrid MSNs of 49 nm diameter. This method was further developed to prepare 30 nm diameter nanocomposite particles with simultaneous NIR fluorescence and superparamagnetic properties, with a core composed of superparamagnetic manganese (II) ferrite nanoparticles (MnFe2O4) coated with a thin silica layer, and a shell of mesoporous silica decorated with AuNCs. The nanocomposite particles feature NIR-photoluminescence with 0.6% quantum yield and large Stokes shift (290 nm), and superparamagnetic response at 300 K, with a saturation magnetization of 13.4 emu g-1. The conjugation of NIR photoluminescence and superparamagnetic properties in the biocompatible nanocomposite has high potential for application in multimodal bioimaging.
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Affiliation(s)
- Bárbara Casteleiro
- Centro de Química Estrutural, Institute of Molecular Sciences (IMS) and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal;
- REQUIMTE/LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal; (M.R.); (A.R.S.)
| | - Mariana Rocha
- REQUIMTE/LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal; (M.R.); (A.R.S.)
| | - Ana R. Sousa
- REQUIMTE/LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal; (M.R.); (A.R.S.)
- IFIMUP—Instituto de Física de Materiais Avançados, Nanotecnologia e Fotónica, Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal;
| | - André M. Pereira
- IFIMUP—Instituto de Física de Materiais Avançados, Nanotecnologia e Fotónica, Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal;
| | - José M. G. Martinho
- Centro de Química Estrutural, Institute of Molecular Sciences (IMS) and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal;
| | - Clara Pereira
- REQUIMTE/LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal; (M.R.); (A.R.S.)
| | - José P. S. Farinha
- Centro de Química Estrutural, Institute of Molecular Sciences (IMS) and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal;
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Palladium Nanoparticles on Chitosan-Coated Superparamagnetic Manganese Ferrite: A Biocompatible Heterogeneous Catalyst for Nitroarene Reduction and Allyl Carbamate Deprotection. Polymers (Basel) 2023; 15:polym15010232. [PMID: 36616581 PMCID: PMC9824173 DOI: 10.3390/polym15010232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 10/27/2022] [Accepted: 10/30/2022] [Indexed: 01/03/2023] Open
Abstract
Although metallic nanocatalysts such as palladium nanoparticles (Pd NPs) are known to possess higher catalytic activity due to their large surface-to-volume ratio, however, in nanosize greatly reducing their activity due to aggregation. To overcome this challenge, superparamagnetic chitosan-coated manganese ferrite was successfully prepared and used as a support for the immobilization of palladium nanoparticles to overcome the above-mentioned challenge. The Pd-Chit@MnFe2O4 catalyst exhibited high catalytic activity in 4-nitrophenol and 4-nitroaniline reductions, with respective turnover frequencies of 357.1 min-1 and 571.4 min-1, respectively. The catalyst can also be recovered easily by magnetic separation after each reaction. Additionally, the Pd-Chit@MnFe2O4 catalyst performed well in the reductive deprotection of allyl carbamate. Coating the catalyst with chitosan reduced the Pd leaching and its cytotoxicity. Therefore, the catalytic activity of Pd-Chit@MnFe2O4 was proven to be unrestricted in biology conditions.
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Kurka DW, Niehues M, Kudruk S, Gerke V, Ravoo BJ. Polythiolactone-Decorated Silica Particles: A Versatile Approach for Surface Functionalization, Catalysis and Encapsulation. Chemistry 2021; 27:7667-7676. [PMID: 33788322 PMCID: PMC8252643 DOI: 10.1002/chem.202100547] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Indexed: 12/29/2022]
Abstract
The surface chemistry of colloidal silica has tremendous effects on its properties and applications. Commonly the design of silica particles is based on their de novo synthesis followed by surface functionalization leading to tailormade properties for a specific purpose. Here, the design of robust "precursor" polymer-decorated silica nano- and microparticles is demonstrated, which allows for easy post-modification by polymer embedded thiolactone chemistry. To obtain this organic-inorganic hybrid material, silica particles (SiO2 P) were functionalized via surface-initiated atom transfer radical polymerization (SI-ATRP) with poly(2-hydroxyethyl acrylate) (PHEA)-poly(thiolactone acrylamide (PThlAm) co-polymer brushes. Exploiting the versatility of thiolactone post-modification, a system was developed that could be used in three exemplary applications: 1) the straightforward molecular post-functionalization to tune the surface polarity, and therefore the dispersibility in various solvents; 2) the immobilization of metal nanoparticles into the polymer brushes via the in situ formation of free thiols that preserved catalytic activity in a model reaction; 3) the formation of redox-responsive, permeable polymer capsules by crosslinking the thiolactone moieties with cystamine dihydrochloride (CDH) followed by dissolution of the silica core.
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Affiliation(s)
- Dustin Werner Kurka
- Organic Chemistry Institute/Center for Soft NanoscienceWestfälische Wilhelms-Universität MünsterCorrensstraße 3648149Münster
- Busso-Peus-Straße 1048149MünsterGermany
| | - Maximilian Niehues
- Organic Chemistry Institute/Center for Soft NanoscienceWestfälische Wilhelms-Universität MünsterCorrensstraße 3648149Münster
- Busso-Peus-Straße 1048149MünsterGermany
| | - Sergej Kudruk
- Institute of Medical Biochemistry, Center for Molecular Biology of InflammationWestfälische Wilhelms-Universität MünsterVon-Esmarch-Straße 5648149 MünsterGermany
| | - Volker Gerke
- Institute of Medical Biochemistry, Center for Molecular Biology of InflammationWestfälische Wilhelms-Universität MünsterVon-Esmarch-Straße 5648149 MünsterGermany
| | - Bart Jan Ravoo
- Organic Chemistry Institute/Center for Soft NanoscienceWestfälische Wilhelms-Universität MünsterCorrensstraße 3648149Münster
- Busso-Peus-Straße 1048149MünsterGermany
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Fan M, Wang WD, Wang X, Zhu Y, Dong Z. Ultrafine Pd Nanoparticles Modified on Azine-Linked Covalent Organic Polymers for Efficient Catalytic Suzuki–Miyaura Coupling Reaction. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c00663] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Mengying Fan
- Laboratory of Special Function Materials and Structure Design of the Ministry of Education, State Key Laboratory of Applied Organic Chemistry, Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Wei David Wang
- Laboratory of Special Function Materials and Structure Design of the Ministry of Education, State Key Laboratory of Applied Organic Chemistry, Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Xiaoyu Wang
- School of Earth Sciences & Key Laboratory of Mineral Resources in Western China (Gansu Province), Lanzhou University, Lanzhou, Gansu 730000, PR China
| | - Yangyang Zhu
- Laboratory of Special Function Materials and Structure Design of the Ministry of Education, State Key Laboratory of Applied Organic Chemistry, Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Zhengping Dong
- Laboratory of Special Function Materials and Structure Design of the Ministry of Education, State Key Laboratory of Applied Organic Chemistry, Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
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Anantharamaiah P, Chandra NS, Shashanka H, Kumar R, Sahoo B. Magnetic and catalytic properties of Cu-substituted SrFe12O19 synthesized by tartrate-gel method. ADV POWDER TECHNOL 2020. [DOI: 10.1016/j.apt.2020.04.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Kip Ç. A Magnetic Plasmonic Catalyst Based on Monodisperse-Porous Silica Microspheres for Rapid Reduction of 4-Nitrophenol. J Inorg Organomet Polym Mater 2020. [DOI: 10.1007/s10904-019-01337-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Aghaei M, Kianfar AH, Dinari M. Catalytic reduction of 4‐nitrophenol by means of nanostructured polymeric Schiff base complexes. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5617] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Marjan Aghaei
- Department of ChemistryIsfahan University of Technology Isfahan 84156‐83111 Iran
| | - Ali Hossein Kianfar
- Department of ChemistryIsfahan University of Technology Isfahan 84156‐83111 Iran
| | - Mohammad Dinari
- Department of ChemistryIsfahan University of Technology Isfahan 84156‐83111 Iran
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Amirmahani N, Rashidi M, Mahmoodi NO. Synthetic application of gold complexes on magnetic supports. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5626] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Najmeh Amirmahani
- Department of ChemistryFaculty of Science, University of Guilan, University Campus 2 Rasht Iran
- Environmental Health Engineering Research CenterKerman University of Medical Sciences Kerman Iran
| | - Mohsen Rashidi
- Department of Chemistry, Faculty of ScienceShahid Bahonar University of Kerman Kerman Iran
| | - Nosrat O. Mahmoodi
- Department of ChemistryFaculty of Science, University of Guilan, University Campus 2 Rasht Iran
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Lu M, Li J, Song S, Li L, Lin J, Zhang B, Li J. The synthesis of 3D graphene/Au composites via γ-ray irradiation and their use for catalytic reduction of 4-nitrophenol. NANOTECHNOLOGY 2020; 31:235604. [PMID: 32106098 DOI: 10.1088/1361-6528/ab7aa5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Graphene oxide (GO) and gold ions (Au3+) can be simultaneously reduced and self-assembled into a three-dimensional (3D) graphene/Au composite (GA/Au) porous structure at room temperature via one-step γ-ray irradiation. The microstructure of GA/Au composites were observed under different magnifications and the pores were observed to be uniform 3D porous structure. In addition, Au nanoparticles were homogeneously attached to graphene sheets and had a typical diameter of 6 nm. These GA/Au composites were analyzed and characterized by x-ray diffraction analysis, x-ray photoelectron spectroscopy, and thermal gravity analysis. Due to synergistic catalysis between graphene and Au nanoparticles, GA/Au composites catalyzed 4-nitrophenol with excellent catalytic performance, even at concentrations up to 6.48 × 10-3 M. When the concentration of 4-nitrophenol was 2.16 × 10-3 M and 4.22 × 10-3 M, the first-order kinetic constants were 2.00 and 1.43 min-1, respectively.
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Affiliation(s)
- Manli Lu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China. University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
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Martimiano do Prado T, Lindo Silva F, Grosseli G, Sergio Fadini P, Fatibello-Filho O, Cruz de Moraes F. Using BiVO 4/CuO-Based Photoelectrocatalyzer for 4-Nitrophenol Degradation. MATERIALS 2020; 13:ma13061322. [PMID: 32183300 PMCID: PMC7143035 DOI: 10.3390/ma13061322] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 03/09/2020] [Accepted: 03/12/2020] [Indexed: 11/16/2022]
Abstract
The present work reports the degradation of 4-nitrophenol using BiVO4/CuO hybrid material synthesized by the precipitation of BiVO4 in the presence of CuO. Morphological and structural characterizations were performed using X-ray diffraction and scanning electronic microscopy coupled to energy dispersive X-ray spectroscopy. Through the calculation of the Kubelka–Munk function applied to diffuse reflectance spectrophotometry data, the hybrid material presented absorption edge of 1.85 eV. The formation of p-n heterojunction between BiVO4 and CuO renders the hybrid material suitable for the construction of a photoanode employed in hydroxyl radical generation. UV–vis spectrophotometry and high-performance liquid chromatography experiments were performed in order to monitor the degradation of 4-nitrophenol and the formation of secondary products. Additional information regarding the hybrid material was obtained through ion chromatography and total organic carbon analyses. The application of BiVO4/CuO-based photocatalyzer led to a 50.2% decrease in total organic carbon after the degradation of 4-nitrophenol. Based on the results obtained in the study, BiVO4/CuO has proved to be a promising material suitable for the removal of recalcitrant compounds in water treatment plants.
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Palladium Oxide Nanoparticles: Preparation, Characterization and Catalytic Activity Evaluation. COATINGS 2020. [DOI: 10.3390/coatings10030207] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Stable palladium oxide nanoparticles were prepared in aqueous suspension with a very simple procedure, by dissolving palladium nitrate in water at a concentration around 10−4 M. UV-visible absorption spectroscopy was adopted to follow the formation of these nanoparticles, which were characterized by TEM microscopy, along with XRD, XPS and Raman measurements. DFT calculations allowed to interpret the Raman data and to clarify the species present at the surface of the nanoparticles. The catalytic activity of the latter was evaluated by monitoring the reduction of p-nitrophenol to p-aminophenol. This investigation paves the way to the use of these colloidal nanoparticles in processes of heterogeneous catalysis, in particular those concerning the catalytic degradation of aromatic derivatives that represent a serious danger for the environment as pollutants, as in the case of p-nitrophenol.
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Mak SY, Liew KH, Chua CC, Yarmo MA, Yahaya BH, Samad WZ, Jamil MSM, Yusop RM. Palladium nanoparticles supported on fluorine-doped tin oxide as an efficient heterogeneous catalyst for Suzuki coupling and 4-nitrophenol reduction. J CHEM SCI 2019. [DOI: 10.1007/s12039-019-1685-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Zhao Y, Cao B, Lin Z, Su X. Synthesis of CoFe 2O 4/C nano-catalyst with excellent performance by molten salt method and its application in 4-nitrophenol reduction. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 254:112961. [PMID: 31398635 DOI: 10.1016/j.envpol.2019.112961] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 07/24/2019] [Accepted: 07/25/2019] [Indexed: 06/10/2023]
Abstract
CoFe2O4/C nano-sheets (NSs) have been synthesized by a facile molten salt method using cheap potassium fulvate as carbon source and sodium chloride as template. The morphology, crystallinity and composition of the materials were analyzed by TEM, XRD and XPS. The study on the catalytic performance of 4-nitrophenol (4-NP) shows that CoFe2O4/C-600 nano-catalyst has the highest catalytic activity and the corresponding apparent constant is 1.91 min-1, this result is higher than that reported in most literatures. Catalytic kinetics of 4-NP reduction was studied in this article, and activation energy (Ea) was calculated to be 14.31 kJ mol-1. The catalyst also shows good cycle performance and stability. This convenient method provides a reference for the synthesis of MFe2O4/C and other nano-metal oxides/C nanocomposite catalysts.
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Affiliation(s)
- Yunlong Zhao
- The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; Ministry Key Laboratory of Oil and Gas Fine Chemicals College of Chemistry and Chemical Engineering, Xinjiang University Urumqi, 830046, China
| | - Baoyong Cao
- Ministry Key Laboratory of Oil and Gas Fine Chemicals College of Chemistry and Chemical Engineering, Xinjiang University Urumqi, 830046, China
| | - Zhang Lin
- The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Xintai Su
- The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), School of Environment and Energy, South China University of Technology, Guangzhou 510006, China.
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Mekkaoui AA, Jennane S, Aberkouks A, Boualy B, Mehdi A, Ait Ali M, El Firdoussi L, El Houssame S. Palladium nanoparticles supported on mesoporous natural phosphate: An efficient recyclable catalyst for nitroarene reduction. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5117] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Ayoub Abdelkader Mekkaoui
- Laboratoire de Chimie, Modélisation et Sciences de l'environnementUniversité Sultan Moulay Slimane Faculté Polydisciplinaire de Khouribga, BP 145 25000 Khouribga Morocco
- Département de Chimie, Faculté des Sciences SemlaliaLaboratoire de Chimie de Coordination et de Catalyse BP 2390 40001 Marrakech Morocco
| | - Sanaa Jennane
- Laboratoire de Chimie, Modélisation et Sciences de l'environnementUniversité Sultan Moulay Slimane Faculté Polydisciplinaire de Khouribga, BP 145 25000 Khouribga Morocco
| | - Abderrazak Aberkouks
- Département de Chimie, Faculté des Sciences SemlaliaLaboratoire de Chimie de Coordination et de Catalyse BP 2390 40001 Marrakech Morocco
| | - Brahim Boualy
- Département de Chimie, Faculté des Sciences SemlaliaLaboratoire de Chimie de Coordination et de Catalyse BP 2390 40001 Marrakech Morocco
| | - Ahmad Mehdi
- Institut Charles Gerhardt Montpellier, UMR 5253, Chimie Moléculaire et Organisation du SolideUniversité Montpellier, Place E. Bataillon 34095 Montpellier Cedex 5 France
| | - Mustapha Ait Ali
- Département de Chimie, Faculté des Sciences SemlaliaLaboratoire de Chimie de Coordination et de Catalyse BP 2390 40001 Marrakech Morocco
| | - Larbi El Firdoussi
- Département de Chimie, Faculté des Sciences SemlaliaLaboratoire de Chimie de Coordination et de Catalyse BP 2390 40001 Marrakech Morocco
| | - Soufiane El Houssame
- Laboratoire de Chimie, Modélisation et Sciences de l'environnementUniversité Sultan Moulay Slimane Faculté Polydisciplinaire de Khouribga, BP 145 25000 Khouribga Morocco
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Wang X, Pu J, Liu Y, Ba F, Cui M, Li K, Xie Y, Nie Y, Mi Q, Li T, Liu L, Zhu M, Zhong C. Immobilization of functional nano-objects in living engineered bacterial biofilms for catalytic applications. Natl Sci Rev 2019; 6:929-943. [PMID: 34691954 PMCID: PMC8291418 DOI: 10.1093/nsr/nwz104] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 07/15/2019] [Accepted: 07/16/2019] [Indexed: 12/12/2022] Open
Abstract
Nanoscale objects feature very large surface-area-to-volume ratios and are now understood as powerful tools for catalysis, but their nature as nanomaterials brings challenges including toxicity and nanomaterial pollution. Immobilization is considered a feasible strategy for addressing these limitations. Here, as a proof-of-concept for the immobilization of nanoscale catalysts in the extracellular matrix of bacterial biofilms, we genetically engineered amyloid monomers of the Escherichia coli curli nanofiber system that are secreted and can self-assemble and anchor nano-objects in a spatially precise manner. We demonstrated three scalable, tunable and reusable catalysis systems: biofilm-anchored gold nanoparticles to reduce nitro aromatic compounds such as the pollutant p-nitrophenol, biofilm-anchored hybrid Cd0.9Zn0.1S quantum dots and gold nanoparticles to degrade organic dyes and biofilm-anchored CdSeS@ZnS quantum dots in a semi-artificial photosynthesis system for hydrogen production. Our work demonstrates how the ability of biofilms to grow in scalable and complex spatial arrangements can be exploited for catalytic applications and clearly illustrates the design utility of segregating high-energy nano-objects from injury-prone cellular components by engineering anchoring points in an extracellular matrix.
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Affiliation(s)
- Xinyu Wang
- Division of Materials and Physical Biology, School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
- Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jiahua Pu
- Division of Materials and Physical Biology, School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Yi Liu
- Division of Materials and Physical Biology, School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Fang Ba
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Mengkui Cui
- Division of Materials and Physical Biology, School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Ke Li
- Division of Materials and Physical Biology, School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Yu Xie
- Division of Materials and Physical Biology, School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Yan Nie
- Shanghai Institute for Advanced Immunochemical Studies (SIAIS), ShanghaiTech University, Shanghai 201210, China
| | - Qixi Mi
- Division of Materials and Physical Biology, School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Tao Li
- Division of Materials and Physical Biology, School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Lingli Liu
- College of Chemistry & Chemical Engineering, Anhui University, Hefei 230039, China
| | - Manzhou Zhu
- College of Chemistry & Chemical Engineering, Anhui University, Hefei 230039, China
| | - Chao Zhong
- Division of Materials and Physical Biology, School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
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Paul A, Bhuyan B, Dhar SS. Study of core–shell α-Fe2O3@Au nanohybrid and their high catalytic performances in aerial oxidation of benzyl alcohols. CHEM ENG COMMUN 2019. [DOI: 10.1080/00986445.2019.1641491] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Arijita Paul
- Department of Chemistry, Karimganj College, Karimganj, Assam, India
- Department of Chemistry, National Institute of Technology Silchar, Silchar, Assam, India
| | - Bishal Bhuyan
- Department of Chemistry, National Institute of Technology Silchar, Silchar, Assam, India
| | - Siddhartha Sankar Dhar
- Department of Chemistry, National Institute of Technology Silchar, Silchar, Assam, India
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Ruthenium Supported on Ionically Cross-linked Chitosan-Carrageenan Hybrid MnFe2O4 Catalysts for 4-Nitrophenol Reduction. Catalysts 2019. [DOI: 10.3390/catal9030254] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Herein, we report a facile procedure to synthesize the hybrid magnetic catalyst (Ru@CS-CR@Mn) using ruthenium (Ru) supported on ionically cross-linked chitosan-carrageenan (CS-CR) and manganese ferrite (MnFe2O4) nanoparticles with excellent catalytic activity. The ionic gelation of CS-CR is acting as a protecting layer to promote the encapsulation of MnFe2O4 and Ru nanoparticles by electrostatic interactions. The presence of an active metal and a CS-CR layer on the as-prepared Ru@CS-CR@Mn catalyst was well determined by a series of physicochemical analyses. Subsequently, the catalytic performances of the Ru@CS-CR@Mn catalysts were further examined in the 4-nitrophenol (4-NP) reduction reaction in the presence of sodium borohydride (reducing agent) at ambient temperature. The Ru@CS-CR@Mn catalyst performed excellent catalytic activity in the 4-NP reduction, with a turnover frequency (TOF) values of 925 h−1 and rate constant (k) of 0.078 s−1. It is worth to mentioning that the Ru@CS-CR@Mn catalyst can be recycled and reused up to at least ten consecutive cycles in the 4-NP reduction with consistency in catalytic performance. The Ru@CS-CR@Mn catalyst is particularly attractive as a catalyst due to its superior catalytic activity and superparamagnetic properties for easy separation. We foresee this catalyst having high potential to be extended in a wide range of chemistry applications.
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Bhaduri K, Das BD, Kumar R, Mondal S, Chatterjee S, Shah S, Bravo-Suárez JJ, Chowdhury B. Recyclable Au/SiO 2-Shell/Fe 3O 4-Core Catalyst for the Reduction of Nitro Aromatic Compounds in Aqueous Solution. ACS OMEGA 2019; 4:4071-4081. [PMID: 31459616 PMCID: PMC6649094 DOI: 10.1021/acsomega.8b03655] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Accepted: 02/11/2019] [Indexed: 05/19/2023]
Abstract
Highly stable gold nanoparticles immobilized on the surface of amine-functionalized nanocomposite microspheres possessing a magnetite (Fe3O4) nanoparticle core and a silica (SiO2) shell (Au/SiO2-shell/Fe3O4-core) were prepared. These gold nanocomposite catalysts were tested for 4-nitrophenol (4-NP) and 2-nitroaniline (2-NA) reduction in aqueous solution in the temperature range 293-323 K and in the presence of aqueous NaBH4 reducing agent. The magnetically recyclable gold catalyst showed high stability (∼3 months), efficient recyclability (up to 10 cycles), and high activity (∼100% conversion within 225 s, ∼700 ppm 4-NP or 2-NA). The pseudo-first-order apparent reaction rate constants (k) of 4-NP and 2-NA reduction were 7.5 × 10-3 and 4.1 × 10-3 s-1, respectively, and with an apparent catalytic activity of 4.48 × 10-8 kmol/(m3 s).
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Affiliation(s)
- Kushanava Bhaduri
- Department
of Applied Chemistry, Indian Institute of
Technology (ISM), Dhanbad, Dhanbad 826004, Jharkhand, India
| | - Bidya Dhar Das
- Department
of Applied Chemistry, Indian Institute of
Technology (ISM), Dhanbad, Dhanbad 826004, Jharkhand, India
| | - Rawesh Kumar
- Department
of Chemistry, Sankalchand Patel University, Visnagar 384315, Gujarat, India
| | - Sujan Mondal
- Department
of Materials Science, Indian Association
for the Cultivation of Science, Kolkata 700032, India
| | - Sauvik Chatterjee
- Department
of Materials Science, Indian Association
for the Cultivation of Science, Kolkata 700032, India
| | - Sneha Shah
- Department
of Applied Chemistry, Indian Institute of
Technology (ISM), Dhanbad, Dhanbad 826004, Jharkhand, India
| | - Juan J. Bravo-Suárez
- Chemical
and Petroleum Engineering Department, Center for Environmentally Beneficial
Catalysis, The University of Kansas, Lawrence, Kansas 66045, United States
- E-mail: (J.J.B.-S.)
| | - Biswajit Chowdhury
- Department
of Applied Chemistry, Indian Institute of
Technology (ISM), Dhanbad, Dhanbad 826004, Jharkhand, India
- E-mail: . Phone +91-326-223-5663, (+91)-326-2296563 (B.C.)
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21
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Yang Y, Yang F, Zeng D, Huang Z, Zhang J, Hao S, Kong X, Zhang Z, Liu B. Surfactant-free synthesis of hollow mesoporous carbon spheres and their encapsulated Au derivatives using biopolymeric chitosan. J Colloid Interface Sci 2018; 531:291-299. [PMID: 30041107 DOI: 10.1016/j.jcis.2018.07.063] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 07/13/2018] [Accepted: 07/17/2018] [Indexed: 11/26/2022]
Abstract
To realize surfactant-free synthesis of biomass-derived hollow mesoporous carbon spheres and their derivatives, choice of synthetic methodology and carbon precursor is crucial. Herein, a brand-new hollow mesoporous carbon sphere (HMCS) is first synthesized from 8-quinolinol modified chitosan via an in situ stöber templating approach without surfactant followed by pyrolysis and alkali washing. The resultant HMCS is uniform, and shows a cavity size of 417 nm, a shell thickness of 5 nm, and a narrow mesopore size distribution centered at 3.9 nm. The HMCS is then upgraded by encapsulation of a single Au nanocrystal (NC) into the void of HMCS to form a yolk-shell architecture, YS-Au@HMCS. Its cavity size and shell thickness are decreased to 187 and 3 nm, while the mesopore size is increased to 4.3 nm, the surface area (215 m2 g-1) and mesoporosity (74.7%) are triple and twice that of HMCS, respectively, just by halving the delay time of carbon source addition. Owing to the unique hollow interiors and mesopores, as well as their synergism with the encapsulated Au NCs, the elaborately fabricated YS-Au@HMCS exhibits appealing catalytic performances towards the deposal of sewage. It delivers a large activity factor of 34.32, 13.29 and 0.05 s-1 g-1 in the reduction of 4-nitrophenol and methylene blue using sodium borohydride, and in the photodegradation of methylene blue under visible light irradiation, respectively. These advances shed new light on the synthesis of hollow mesoporous carbon spheres and the designed synthesis of functional carbon materials with versatile applications.
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Affiliation(s)
- Ying Yang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Changping, Beijing 102249, China.
| | - Feng Yang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Changping, Beijing 102249, China
| | - Dehong Zeng
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Changping, Beijing 102249, China
| | - Zulin Huang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Changping, Beijing 102249, China
| | - Jiping Zhang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Changping, Beijing 102249, China
| | - Shijie Hao
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Changping, Beijing 102249, China
| | - Xiangguang Kong
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Changping, Beijing 102249, China
| | - Zongbo Zhang
- Research/Education Center for Excellence in Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Baijun Liu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Changping, Beijing 102249, China
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22
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Chang Z, Yang Y, He J, Rusling JF. Gold nanocatalysts supported on carbon for electrocatalytic oxidation of organic molecules including guanines in DNA. Dalton Trans 2018; 47:14139-14152. [PMID: 30066010 PMCID: PMC6191342 DOI: 10.1039/c8dt01966e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Gold (Au) is chemically stable and resistant to oxidation. Although bulk Au is catalytically inert, nanostructured Au exhibits unique size-dependent catalytic activity. When Au nanocatalysts are supported on conductive carbon (denoted as Au@C), Au@C becomes promising for a wide range of electrochemical reactions such as electrooxidation of alcohols and electroreduction of carbon dioxide. In this mini-review, we summarize Au@C nanocatalysts with specific attention on the most recent achievements including the findings in our own laboratories, and show that Au nanoclusters (AuNCs, <2 nm) on nitrided carbon are excellent electrocatalysts for the oxidation of organic molecules including guanines in DNA. The state-of-the-art synthesis and characterization of these nanomaterials are also documented. Synergistic interactions among Au-containing multicomponents on carbon supports and their applications in electrocatalysis are discussed as well. Finally, challenges and future outlook for these emerging and promising nanomaterials are envisaged.
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Affiliation(s)
- Zheng Chang
- Department of Applied Chemistry of College of Science, Xi’an University of Technology, Xi’an 710054, China
- Department of Chemistry, University of Connecticut, Storrs, CT 06269, USA
| | - Yue Yang
- Department of Chemical Engineering, Nanjing University of Science and Technology, Jiangsu 210094, China
- Department of Chemistry, University of Connecticut, Storrs, CT 06269, USA
| | - Jie He
- Department of Chemistry, University of Connecticut, Storrs, CT 06269, USA
- Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA
| | - James F. Rusling
- Department of Chemistry, University of Connecticut, Storrs, CT 06269, USA
- Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA
- Department of Surgery and Neag Cancer Center, UConn Health, Farmington, CT 06032, USA
- School of Chemistry, National University of Ireland at Galway, Galway H91 TK33, Ireland
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23
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Yang J, Wang WD, Dong Z. PdCo nanoparticles supported on carbon fibers derived from cotton: Maximum utilization of Pd atoms for efficient reduction of nitroarenes. J Colloid Interface Sci 2018; 524:84-92. [DOI: 10.1016/j.jcis.2018.04.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2018] [Revised: 04/01/2018] [Accepted: 04/02/2018] [Indexed: 11/26/2022]
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24
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Copper mesoporous materials as highly efficient recyclable catalysts for the reduction of 4-nitrophenol in aqueous media. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.04.037] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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25
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l-serine-functionalized montmorillonite decorated with Au nanoparticles: A new highly efficient catalyst for the reduction of 4-nitrophenol. J Catal 2018. [DOI: 10.1016/j.jcat.2018.02.027] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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26
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Wang S, Gao S, Tang Y, Wang L, Jia D, Liu L. Facile solid-state synthesis of highly dispersed Cu nanospheres anchored on coal-based activated carbons as an efficient heterogeneous catalyst for the reduction of 4-nitrophenol. J SOLID STATE CHEM 2018. [DOI: 10.1016/j.jssc.2018.01.025] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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27
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Liew KH, Rocha M, Pereira C, Pires AL, Pereira AM, Yarmo MA, Juan JC, Yusop RM, Peixoto AF, Freire C. Highly Active Ruthenium Supported on Magnetically Recyclable Chitosan-Based Nanocatalyst for Nitroarenes Reduction. ChemCatChem 2017. [DOI: 10.1002/cctc.201700649] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Kin Hong Liew
- REQUIMTE-LAQV, Department of Chemistry and Biochemistry, Faculty of Sciences; University of Porto; 4169-007 Porto Portugal
- School of Chemical Sciences and Food Technology; Faculty of Science and Technology; Universiti Kebangsaan Malaysia; 43600 UKM Bangi Selangor Darul Ehsan Malaysia
| | - Mariana Rocha
- REQUIMTE-LAQV, Department of Chemistry and Biochemistry, Faculty of Sciences; University of Porto; 4169-007 Porto Portugal
| | - Clara Pereira
- REQUIMTE-LAQV, Department of Chemistry and Biochemistry, Faculty of Sciences; University of Porto; 4169-007 Porto Portugal
| | - Ana L. Pires
- IFIMUP-IN, Department of Physics and Astronomy, Faculty of Sciences; University of Porto; 4169-007 Porto Portugal
| | - André M. Pereira
- IFIMUP-IN, Department of Physics and Astronomy, Faculty of Sciences; University of Porto; 4169-007 Porto Portugal
| | - Mohd Ambar Yarmo
- School of Chemical Sciences and Food Technology; Faculty of Science and Technology; Universiti Kebangsaan Malaysia; 43600 UKM Bangi Selangor Darul Ehsan Malaysia
| | - Joon Ching Juan
- Nanotechnology & Catalysis Research Centre, NANOCAT; University of Malaya; 50603 Kuala Lumpur Malaysia
| | - Rahimi M. Yusop
- School of Chemical Sciences and Food Technology; Faculty of Science and Technology; Universiti Kebangsaan Malaysia; 43600 UKM Bangi Selangor Darul Ehsan Malaysia
| | - Andreia F. Peixoto
- REQUIMTE-LAQV, Department of Chemistry and Biochemistry, Faculty of Sciences; University of Porto; 4169-007 Porto Portugal
| | - Cristina Freire
- REQUIMTE-LAQV, Department of Chemistry and Biochemistry, Faculty of Sciences; University of Porto; 4169-007 Porto Portugal
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28
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Walker JM, Zaleski JM. A simple route to diverse noble metal-decorated iron oxide nanoparticles for catalysis. NANOSCALE 2016; 8:1535-1544. [PMID: 26681072 DOI: 10.1039/c5nr06700f] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Developing facile synthetic routes to multifunctional nanoparticles combining the magnetic properties of iron oxides with the optical and catalytic utility of noble metal particles remains an important goal in realizing the potential of hybrid nanomaterials. To this end, we have developed a single route to noble metal-decorated magnetic nanoparticles (Fe3O4@SiO2-M; M = Au, Pd, Ag, and PtAg) and characterized them by HRTEM and STEM/EDX imaging to reveal their nanometer size (16 nm Fe3O4 and 1-5 nm M seeds) and uniformity. This represents one of the few examples of genuine multifunctional particles on the nanoscale. We show that these hybrid structures have excellent catalytic activity for the reduction of 4-nitrophenol (knorm = 2 × 10(7) s(-1) mol(Pd)(-1); 5 × 10(6) s(-1) mol(Au)(-1); 5 × 10(5) s(-1) mol(PtAg)(-1); 7 × 10(5) s(-1) mol(Ag)(-1)). These rates are the highest reported for nano-sized comparables, and are competitive with mesoparticles of similar composition. Due to their magnetic response, the particles are also suitable for magnetic recovery and maintain >99% conversion for at least four cycles. Using this synthetic route, Fe3O4@SiO2-M particles show great promise for further development as a precursor to complicated anisotropic materials or for applications ranging from nanocatalysis to biomedical sensing.
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Affiliation(s)
- Joan M Walker
- Department of Chemistry, Indiana University, Bloomington, IN, USA.
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29
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Schaefer S, Felix EM, Muench F, Antoni M, Lohaus C, Brötz J, Kunz U, Gärtner I, Ensinger W. NiCo nanotubes plated on Pd seeds as a designed magnetically recollectable catalyst with high noble metal utilisation. RSC Adv 2016. [DOI: 10.1039/c6ra10235b] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The tailored structure of a bifunctional, semi-homogeneous NiCo-nanotube catalyst system with embedded Pd nanoparticles, is synthesised by electroless plating.
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Affiliation(s)
- S. Schaefer
- Technische Universität Darmstadt
- Department of Materials Science
- 64287 Darmstadt
- Germany
| | - E.-M. Felix
- Technische Universität Darmstadt
- Department of Materials Science
- 64287 Darmstadt
- Germany
| | - F. Muench
- Technische Universität Darmstadt
- Department of Materials Science
- 64287 Darmstadt
- Germany
| | - M. Antoni
- Technische Universität Darmstadt
- Department of Materials Science
- 64287 Darmstadt
- Germany
| | - C. Lohaus
- Technische Universität Darmstadt
- Department of Materials Science
- 64287 Darmstadt
- Germany
| | - J. Brötz
- Technische Universität Darmstadt
- Department of Materials Science
- 64287 Darmstadt
- Germany
| | - U. Kunz
- Technische Universität Darmstadt
- Department of Materials Science
- 64287 Darmstadt
- Germany
| | - I. Gärtner
- Technische Universität Darmstadt
- MPA/IfW Darmstadt
- 64283 Darmstadt
- Germany
| | - W. Ensinger
- Technische Universität Darmstadt
- Department of Materials Science
- 64287 Darmstadt
- Germany
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30
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Mussel-inspired modification of Microporous polypropylene membranes for functional catalytic degradation. CHINESE JOURNAL OF POLYMER SCIENCE 2015. [DOI: 10.1007/s10118-015-1726-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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31
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Dong Z, Yu G, Le X. Gold nanoparticle modified magnetic fibrous silica microspheres as a highly efficient and recyclable catalyst for the reduction of 4-nitrophenol. NEW J CHEM 2015. [DOI: 10.1039/c5nj00713e] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Au nanoparticles were immobilized on magnetic fibrous silica microspheres as highly active and recyclable nanocatalysts for the catalytic reduction of 4-nitrophenol to 4-aminophenol.
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Affiliation(s)
- Zhengping Dong
- College of Chemistry and Chemical Engineering
- Gansu Provincial Engineering Laboratory for Chemical Catalysis
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Guiqin Yu
- College of Chemistry and Chemical Engineering
- Gansu Provincial Engineering Laboratory for Chemical Catalysis
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Xuanduong Le
- College of Chemistry and Chemical Engineering
- Gansu Provincial Engineering Laboratory for Chemical Catalysis
- Lanzhou University
- Lanzhou 730000
- P. R. China
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32
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Ghosh S, Das R, Chowdhury IH, Bhanja P, Naskar MK. Rapid template-free synthesis of an air-stable hierarchical copper nanoassembly and its use as a reusable catalyst for 4-nitrophenol reduction. RSC Adv 2015. [DOI: 10.1039/c5ra16644f] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A hierarchical copper nanoassembly was synthesized by solvothermal treatment at 150 °C for 2 h in the absence of any templating agents, and exhibited excellent air-stability, antioxidative properties and catalytic reduction of 4-nitrophenol.
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Affiliation(s)
- Sourav Ghosh
- Sol-Gel Division
- CSIR-Central Glass and Ceramic Research Institute
- Kolkata 700 032
- India
| | - Rituparna Das
- Sol-Gel Division
- CSIR-Central Glass and Ceramic Research Institute
- Kolkata 700 032
- India
| | | | - Piyali Bhanja
- Indian Association for the Cultivation of Science
- Kolkata 700 032
- India
| | - Milan Kanti Naskar
- Sol-Gel Division
- CSIR-Central Glass and Ceramic Research Institute
- Kolkata 700 032
- India
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33
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Jia WG, Dai YC, Zhang HN, Lu X, Sheng EH. Synthesis and characterization of gold complexes with pyridine-based SNS ligands and as homogeneous catalysts for reduction of 4-nitrophenol. RSC Adv 2015. [DOI: 10.1039/c5ra01749a] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Three gold complexes efficiently catalyze 4-nitrophenol reduction to 4-nitroaniline in the presence of NaBH4 under homogeneous conditions in water.
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Affiliation(s)
- Wei-Guo Jia
- College of Chemistry and Materials Science
- Center for Nano Science and Technology
- The Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecular-Based Materials
| | - Yuan-Chen Dai
- College of Chemistry and Materials Science
- Center for Nano Science and Technology
- The Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecular-Based Materials
| | - Hai-Ning Zhang
- College of Chemistry and Materials Science
- Center for Nano Science and Technology
- The Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecular-Based Materials
| | - Xiaojing Lu
- College of Chemistry and Materials Science
- Center for Nano Science and Technology
- The Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecular-Based Materials
| | - En-Hong Sheng
- College of Chemistry and Materials Science
- Center for Nano Science and Technology
- The Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecular-Based Materials
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34
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Krishna R, Fernandes DM, Domingos VF, Ribeiro ES, Gil JC, Dias C, Ventura J, Freire C, Titus E. Reduction of 4-nitrophenol to 4-aminophenol using a novel Pd@NixB–SiO2/RGO nanocomposite: enhanced hydrogen spillover and high catalytic performance. RSC Adv 2015. [DOI: 10.1039/c5ra05523g] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
In the present study, we report a facile synthesis of novel Pd–NixB–SiO2/RGO (Pd@NSG) nanocomposite and discuss its enhanced H2 spillover mechanism and high catalytic performance towards reduction of 4-nitrophenol (4-NP) to 4-aminopehol (4-AP).
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Affiliation(s)
- Rahul Krishna
- Centre for Mechanical Technology and Automation (TEMA)
- Department of Mechanical Engineering
- University of Aveiro
- Portugal
| | - Diana M. Fernandes
- REQUIMTE/LAQV
- Department of Chemistry and Biochemistry
- Faculty of Sciences
- University of Porto
- 4169-007 Porto
| | | | | | - João Campos Gil
- CFisUC
- Department of Physics
- University of Coimbra
- Coimbra 3004-516
- Portugal
| | - Catarina Dias
- IFIMUP
- IN – Institute of Nanoscience and Nanotechnology
- Department of Physics and Astronomy
- Faculty of Sciences
- University of Porto
| | - João Ventura
- IFIMUP
- IN – Institute of Nanoscience and Nanotechnology
- Department of Physics and Astronomy
- Faculty of Sciences
- University of Porto
| | - Cristina Freire
- REQUIMTE/LAQV
- Department of Chemistry and Biochemistry
- Faculty of Sciences
- University of Porto
- 4169-007 Porto
| | - Elby Titus
- Centre for Mechanical Technology and Automation (TEMA)
- Department of Mechanical Engineering
- University of Aveiro
- Portugal
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35
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Koczkur KM, Mourdikoudis S, Polavarapu L, Skrabalak SE. Polyvinylpyrrolidone (PVP) in nanoparticle synthesis. Dalton Trans 2015; 44:17883-905. [DOI: 10.1039/c5dt02964c] [Citation(s) in RCA: 911] [Impact Index Per Article: 101.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The versatile role of PVP in nanoparticle synthesis is discussed in this Perspective article.
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Affiliation(s)
| | | | - Lakshminarayana Polavarapu
- Photonics and Optoelectronics Group
- Department of Physics and CeNS
- Ludwig-Maximilians-Universität München
- Munich
- Germany
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