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Surfactant‐Free In Situ Synthesis of Sub‐5 nm Silver Nanoparticles Embedded Silica Sub‐Microspheres as Highly Efficient and Recyclable Catalysts
Author(s) -
Shen Qihui,
Gao Hanliang,
Xue Peng,
Lü Yang,
Li Dongmei,
Lian Lili,
Liu Yan,
Liu Xiaoyang
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201802092
Subject(s) - catalysis , pulmonary surfactant , nanoparticle , chemical engineering , microsphere , 4 nitrophenol , materials science , in situ , noble metal , nanotechnology , chemistry , organic chemistry , engineering
Abstract A novel surfactant‐free in situ synthesis approach of ‘naked’ small silver nanoparticles (2.63 nm.d) supported by silica sub‐microspheres was demonstrated. When this catalyst was used for 4‐nitrophenol catalytic reduction, the rate constant k reached 0.42 s −1 even when the catalyst concentration was low (10 mg•L −1 ). Meanwhile, the catalysts also maintained their high catalytic efficiency even after 25 repeated reaction cycles. Our approach therefore provided a way to generate ‘clean’ Ag nanoparticles supported catalyst without any post‐treatment, which exhibited outstanding catalytic activity and could potentially extend to the heterogeneous catalysts development based on other noble metals.