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Yang R, Liu Y, Chen J, Zhu W, Dong G. Photo‐responsive block copolymer containing azobenzene group: Synthesis by reversible addition‐fragmentation chain transfer polymerization and characterization. J Appl Polym Sci 2019. [DOI: 10.1002/app.47870] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Runmiao Yang
- School of Material EngineeringJiangsu University of Technology Changzhou 213001 China
| | - Yuhai Liu
- School of Material EngineeringJiangsu University of Technology Changzhou 213001 China
| | - Jianxiang Chen
- School of Material EngineeringJiangsu University of Technology Changzhou 213001 China
| | - Wen Zhu
- School of Material EngineeringJiangsu University of Technology Changzhou 213001 China
| | - Guanxiu Dong
- School of Material EngineeringJiangsu University of Technology Changzhou 213001 China
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2
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Liao G, Fang J, Li Q, Li S, Xu Z, Fang B. Ag-Based nanocomposites: synthesis and applications in catalysis. NANOSCALE 2019; 11:7062-7096. [PMID: 30931457 DOI: 10.1039/c9nr01408j] [Citation(s) in RCA: 121] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Ag-Based nanocomposites, including supported Ag nanocomposites and bimetallic Ag nanocomposites, have been intensively investigated as highly efficient catalysts because of their high activity and stability, easy preparation, low cost, and low toxicity. Herein, we systematically summarize and comprehensively evaluate versatile synthetic strategies for the preparation of Ag-based nanocomposites, and outline their recent advances in catalytic oxidation, catalytic reduction, photocatalysis and electrocatalysis. In addition, the challenges and prospects related to Ag-based nanocomposites for various catalytic applications are also discussed. In light of the most recent advances in Ag-based nanocomposites for catalysis applications, this review provides a comprehensive assessment on the material selection, synthesis and catalytic characteristics of these catalysts, which offers a strategic guide to build a close connection between Ag nanocomposites and catalysis applications.
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Affiliation(s)
- Guangfu Liao
- School of Environment and Civil Engineering, Dongguan University of Technology, Guangdong 523808, China.
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Collinson MM, Higgins DA. Organosilane Chemical Gradients: Progress, Properties, and Promise. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:13719-13732. [PMID: 28849936 DOI: 10.1021/acs.langmuir.7b02259] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Chemical gradients play an important role in nature, driving many different phenomena critical to life, including the transport of chemical species across membranes and the transport, attachment, and assembly of cells. Taking a cue from these natural processes, scientists and engineers are now working to develop synthetic chemical gradients for use in a broad range of applications, such as in high-throughput investigations of surface properties, as means to guide the motions and/or assembly of liquid droplets, vesicles, nanoparticles, and cells and as new media for stationary-phase-gradient chemical separations. Our groups have been working to develop new methods for preparing chemical gradients from organoalkoxysilane and organochlorosilane precursors and to obtain a better understanding of their properties on macroscopic to microscopic length scales. This review highlights our recent work on the development of controlled-rate infusion and infusion-withdrawal dip-coating methods for the preparation of gradients on planar glass and silicon substrates, on thin-layer chromatography plates, and in capillaries and monoliths for liquid chromatography. We also cover the new knowledge gained from the characterization of our gradients using sessile drop and Wilhelmy plate dynamic water contact angle measurements, X-ray photoelectron spectroscopy mapping, and single-molecule tracking and spectroscopy. Our studies reveal important evidence of phase separation and cooperative interactions occurring along multicomponent gradients. Emerging concepts and new directions in the preparation and characterization of organosilane-based chemical gradients are also discussed.
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Affiliation(s)
- Maryanne M Collinson
- Department of Chemistry, Virginia Commonwealth University , 1001 West Main Street, Richmond, Virginia 23284-2006, United States
| | - Daniel A Higgins
- Department of Chemistry, Kansas State University , 1212 Mid-Campus Drive North, Manhattan, Kansas 66506-0401, United States
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Le LY, Ren AM, Gao XH, Zhao D, Xie RH, Zhang N. A protector-free one-pot strategy to synthesize highly dispersed Pd hydrogenation catalysts in a broad loading range on polystyrene. RSC Adv 2017. [DOI: 10.1039/c6ra28570h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Pd nanocatalysts in desired size range (ca. 3.0–5.0 nm) and clean state (protector-free) were feasibly prepared in one-pot system by a surface electrostatic manipulation on polystyrene in broad loading (0.2–4.6 wt%).
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Affiliation(s)
- Li-Yun Le
- Institute of Applied Chemistry
- College of Chemistry
- Nanchang University
- Nanchang
- China
| | - Ai-Min Ren
- Institute of Applied Chemistry
- College of Chemistry
- Nanchang University
- Nanchang
- China
| | - Xing-Heng Gao
- Institute of Applied Chemistry
- College of Chemistry
- Nanchang University
- Nanchang
- China
| | - Dan Zhao
- Institute of Applied Chemistry
- College of Chemistry
- Nanchang University
- Nanchang
- China
| | - Run-Hong Xie
- Institute of Applied Chemistry
- College of Chemistry
- Nanchang University
- Nanchang
- China
| | - Ning Zhang
- Institute of Applied Chemistry
- College of Chemistry
- Nanchang University
- Nanchang
- China
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5
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Kumar Sahoo P, Panigrahy B, Thakur D, Bahadur D. Ice-templating synthesis of macroporous noble metal/3D-graphene nanocomposites: their fluorescence lifetimes and catalytic study. NEW J CHEM 2017. [DOI: 10.1039/c7nj00128b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Porous architectures of 3D-graphene assembled with noble metal (Au, Pd and Pt) nanoparticles were successfully fabricated through a one-step green route using a low-cost freeze-casting method.
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Affiliation(s)
- Prasanta Kumar Sahoo
- Department of Metallurgical Engineering and Materials Science
- Indian Institute of Technology Bombay
- Powai
- India
- Centre for Nano Science and Nano Technology
| | - Bharati Panigrahy
- Solid State and Structural Chemistry Unit
- Indian Institute of Science
- Bangalore
- India
| | - Dinbandhu Thakur
- Centre for Nano Science and Nano Technology
- Siksha ‘O’ Anusandhan University
- Bhubaneswar 751030
- India
| | - Dhirendra Bahadur
- Centre for Nano Science and Nano Technology
- Siksha ‘O’ Anusandhan University
- Bhubaneswar 751030
- India
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Hu Y, Zhao T, Zhu P, Zhu Y, Liang X, Sun R, Wong CP. Tailoring Size and Coverage Density of Silver Nanoparticles on Monodispersed Polymer Spheres as Highly Sensitive SERS Substrates. Chem Asian J 2016; 11:2428-35. [PMID: 27511618 DOI: 10.1002/asia.201600821] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2016] [Revised: 07/16/2016] [Indexed: 12/27/2022]
Abstract
Silver nanoparticles (AgNPs) were deposited onto the monodispersed carboxylic polystyrene (CPS) spheres by an improved in situ reduction method. The size and coverage density of the AgNPs on the surface of CPS spheres could be easily tailored by tuning the concentrations of carboxylic functional groups and silver precursor. The morphologies and structures of the resulting CPS/Ag hybrid particles were studied by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), UV-Vis-NIR spectrometer and X-ray photoelectron spectroscopy (XPS), etc. The surface enhanced Raman scattering (SERS) performances of the resulting uniform CPS/Ag hybrid particles were investigated using 4-aminobenzenethiol (4-ABT) as the probe molecule. The optimized CPS/Ag hybrid particles show high enhancement factor (EF) of 2.71×10(7) , low limit of detection (LOD) of 10(-10) m and good reproducibility with relative standard deviation (RSD) of 9.64 %. The good SERS improvement properties demonstrate these hybrid particles could be employed as simple and effective substrates in the SERS spectroscopy.
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Affiliation(s)
- Yougen Hu
- Guangdong Provincial Key Laboratory of Materials for High Density Electronic Packing, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, P. R. China.,Shenzhen College of Advanced Technology, University of Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, P. R. China
| | - Tao Zhao
- Guangdong Provincial Key Laboratory of Materials for High Density Electronic Packing, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, P. R. China
| | - Pengli Zhu
- Guangdong Provincial Key Laboratory of Materials for High Density Electronic Packing, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, P. R. China. .,Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, 999077, P. R. China.
| | - Yu Zhu
- Guangdong Provincial Key Laboratory of Materials for High Density Electronic Packing, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, P. R. China.,Nano Science and Technology Institute, University of Sciences and Technology of China, Suzhou, Jiangsu, 215123, P. R. China
| | - Xianwen Liang
- Guangdong Provincial Key Laboratory of Materials for High Density Electronic Packing, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, P. R. China
| | - Rong Sun
- Guangdong Provincial Key Laboratory of Materials for High Density Electronic Packing, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, P. R. China
| | - Ching-Ping Wong
- Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, 999077, P. R. China.,School of Materials Sciences and Engineering, Georgia Institute of Technology, Atlanta, Georgia, 30332, USA
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Wang ZZ, Zhai SR, Zhai B, An QD. One-Step Green Synthesis of Multifunctional Fe3O4/Cu Nanocomposites toward Efficient Reduction of Organic Dyes. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201403219] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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8
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Hu Y, Zhao T, Zhu P, Liang X, Sun R, Wong CP. Preparation of large micron-sized monodisperse polystyrene/silver core–shell microspheres with compact shell structure and their electrical conductive and catalytic properties. RSC Adv 2015. [DOI: 10.1039/c4ra12475h] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Large micron-sized monodisperse PS/Ag core–shell microspheres and their corresponding hollow Ag spheres were synthesized via an improved mild electroless plating strategy.
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Affiliation(s)
- Yougen Hu
- Shenzhen Institutes of Advanced Technology
- Chinese Academy of Sciences
- Shenzhen
- China
- University of Chinese Academy of Sciences
| | - Tao Zhao
- Shenzhen Institutes of Advanced Technology
- Chinese Academy of Sciences
- Shenzhen
- China
| | - Pengli Zhu
- Shenzhen Institutes of Advanced Technology
- Chinese Academy of Sciences
- Shenzhen
- China
| | - Xianwen Liang
- Shenzhen Institutes of Advanced Technology
- Chinese Academy of Sciences
- Shenzhen
- China
| | - Rong Sun
- Shenzhen Institutes of Advanced Technology
- Chinese Academy of Sciences
- Shenzhen
- China
| | - Ching-Ping Wong
- School of Materials Sciences and Engineering
- Georgia Institute of Technology
- Atlanta
- USA
- Department of Electronic Engineering
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Facile Synthesis of Mono-Dispersed Polystyrene (PS)/Ag Composite Microspheres via Modified Chemical Reduction. MATERIALS 2013; 6:5625-5638. [PMID: 28788413 PMCID: PMC5452758 DOI: 10.3390/ma6125625] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Revised: 11/15/2013] [Accepted: 11/25/2013] [Indexed: 11/16/2022]
Abstract
A modified method based on in situ chemical reduction was developed to prepare mono-dispersed polystyrene/silver (PS/Ag) composite microspheres. In this approach; mono-dispersed PS microspheres were synthesized through dispersion polymerization using poly-vinylpyrrolidone (PVP) as a dispersant at first. Then, poly-dopamine (PDA) was fabricated to functionally modify the surfaces of PS microspheres. With the addition of [Ag(NH₃)₂]⁺ to the PS dispersion, [Ag(NH₃)₂]⁺ complex ions were absorbed and reduced to silver nanoparticles on the surfaces of PS-PDA microspheres to form PS/Ag composite microspheres. PVP acted both as a solvent of the metallic precursor and as a reducing agent. PDA also acted both as a chemical protocol to immobilize the silver nanoparticles at the PS surface and as a reducing agent. Therefore, no additional reducing agents were needed. The resulting composite microspheres were characterized by TEM, field emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDS), XRD, UV-Vis and surface-enhanced Raman spectroscopy (SERS). The results showed that Ag nanoparticles (NPs) were homogeneously immobilized onto the PS microspheres' surface in the presence of PDA and PVP. PS/Ag composite microspheres were well formed with a uniform and compact shell layer and were adjustable in terms of their optical property.
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Zhang T, Li X, Kang S, Qin L, Yan W, Mu J. Facile assembly and properties of polystyrene microsphere/reduced graphene oxide/Ag composite. J Colloid Interface Sci 2013; 402:279-83. [DOI: 10.1016/j.jcis.2013.03.042] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Revised: 02/24/2013] [Accepted: 03/27/2013] [Indexed: 10/27/2022]
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