文献类型：期刊文献

英文题名：Ecofriendly Synthesis and Photocatalytic Activity of Uniform Cubic Ag@AgCl Plasmonic Photocatalyst

作者：Dong, Rongfang;Tian, Baozhu[1];Zeng, Cuiyun;Li, Taoyun;Wang, Tingting;Zhang, Jinlong

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China; E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China

年份：2013

卷号：117

期号：1

起止页码：213

外文期刊名：JOURNAL OF PHYSICAL CHEMISTRY C

收录：;EI(收录号：20130415925649);WOS:【SCI-EXPANDED(收录号:WOS:000313220700029)】；

基金：This work was supported by the National Natural Science Foundation of China (21277046, 21047002, 21173077), the Shanghai Natural Science Foundation (10ZR1407400), the National Basic Research Program of China (973 Program, 2010CB732306), the Project of International Cooperation of the Ministry of Science and Technology of China (2011DFA50530), and the Science and Technology Commission of Shanghai Municipality (10JC1403900).

语种：英文

外文关键词：Light - Precipitation (chemical) - Photocatalysts - Silver halides - Organic pollutants - Plasmonics - X ray diffraction - X ray photoelectron spectroscopy - Azo dyes - Scanning electron microscopy - Fighter aircraft - Paramagnetic resonance - Photodegradation - Silver nanoparticles - Atomic force microscopy - Biodegradation - Electron spin resonance spectroscopy - Magnetic moments - Synthesis (chemical)

摘要：Uniform cubic Ag@AgCl plasmonic photocatalyst was synthesized by a facile green route in the absence of organic solvent, in which a controllable double-jet precipitation technique was employed to fabricate homogeneous cubic AgCl grains and a photoreduction process was used to produce Ag nanoparticles (NPs) on the surface of AgCl. During the double-jet precipitation process, the presence of gelatin and Cl- ions at low concentration was necessary for the formation of cubic AgCl grains. Atomic force microscopy (AFM) was used to probe the morphological structure of Ag@AgCl grains for the first time, which showed that Ag NPs are anchored on the surface of AgCl grains like up-and-down mounds. Further characterization of the photocatalyst was also done by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV-visible diffuse reflectance spectroscopy (DRS). The as-prepared Ag@AgCl plasmonic photocatalyst exhibited excellent photocatalytic efficiency for the degradation of the azo dye acid orange 7 (AO7), phenol, and 2,4-dichlorophenol (2,4-DCP). The photocatalytic mechanism was studied by radical-trapping experiments and the electron spin resonance (ESR) technique with 5,5-dimethyl-1-pyrroline N-oxide (DMPO), and the results indicated that O-center dot(2)- and Cl-0 are responsible for the rapid degradation of organic pollutants under visible-light irradiation.