TiO2-supported Ag nanoclusters with enhanced visible light activity for the photocatalytic removal of NO
Duan, Yanyan1,2; Luo, Jianmin2; Zhou, Shaochen2; Mao, Xinyou2; Shah, Muhammad Wajid3; Wang F(王富)2; Chen ZH(陈志鸿)1; Wang CY(王传义)1,2
作者部门广州中国科学院沈阳自动化研究所分所
关键词Supported Ag Nanoclusters Photocatalysis No Removal Selective Degradation Visible Light
发表期刊Applied Catalysis B: Environmental
ISSN0926-3373
2018
卷号234页码:206-212
收录类别SCI ; EI
EI收录号20181805129563
WOS记录号WOS:000433650000021
产权排序1
资助机构National Natural Science Foundation of China ; Guangdong Provincial Science and Technology Project ; Support Scheme of Guangzhou for Leading Talents in Innovation and Entrepreneurship from Guangzhou
摘要

Metal nanoparticles have been widely used in photocatalysis, while metal nanoclusters (NCs) smaller than 2 nm are barely studied for photocatalytic reactions. In this work, we explored the photocatalytic performances of the TiO2supported Ag NCs (Ag NCs/TiO2). Interestingly, small loading amount (about 0.89% in Ag/Ti molar ratio) of Ag NCs on TiO2(Ag NCs/TiO2-0.89) results in remarkable improvement in the photoactivity of NO removal. Ag NCs/TiO2-0.89 can remove 62% of NO in just 7 min, compared to that of only about 20% and 32% for the pristine TiO2and Ag NCs, respectively. Besides, the support (TiO2) exhibits a strong effect, and Ag NCs/TiO2-0.89 is found to exhibit excellent stability and recyclability. More importantly, the composite can depress the amount of formed intermediate, NO2. In addition, Ag NCs/TiO2-0.89 has better photocatalytic performance against rhodamine B and methylene blue (cationic dyes) than methyl orange (anionic dye). This selectivity towards cationic dyes is interpreted by the electronegativity of AgNCs/TiO2-0.89 (the Zeta potential of which is – 12.4 mV). Results also show that Ag NCs can behavior like a semiconductor, responding to the incident visible-light, promoting the separation of photogenerated electron-hole pairs and producing [rad]O2−. Both [rad]O2−and photogenerated carriers are responsible for the photocatalytic reactions. The present study expands applications of Ag NCs, and highlights the vital effects of Ag NCs on the enhanced photoactivity and photocatalytic selectivity.

语种英语
WOS类目Chemistry, Physical ; Engineering, Environmental ; Engineering, Chemical
关键词[WOS]FLUORESCENT SILVER NANOCLUSTERS ; QUANTUM CLUSTER ; HIGHLY EFFICIENT ; HIGH SELECTIVITY ; NITROGEN-OXIDES ; CO OXIDATION ; TIO2 ; DEGRADATION ; CATALYSTS ; POLYMER
WOS研究方向Chemistry ; Engineering
资助项目National Natural Science Foundation of China[21473248] ; Guangdong Provincial Science and Technology Project[2017A050506009] ; Support Scheme of Guangzhou for Leading Talents in Innovation and Entrepreneurship from Guangzhou[2016015]
引用统计
文献类型期刊论文
条目标识符http://ir.sia.cn/handle/173321/21840
专题广州中国科学院沈阳自动化研究所分所
通讯作者Wang F(王富); Chen ZH(陈志鸿); Wang CY(王传义)
作者单位1.Shenyang Institute of Automation, Guangzhou, Chinese Academy of Sciences, Guangzhou 511458, China;
2.Laboratory of Environmental Science and Technology, The Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi 830011, China;
3.MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China
推荐引用方式
GB/T 7714
Duan, Yanyan,Luo, Jianmin,Zhou, Shaochen,et al. TiO2-supported Ag nanoclusters with enhanced visible light activity for the photocatalytic removal of NO[J]. Applied Catalysis B: Environmental,2018,234:206-212.
APA Duan, Yanyan.,Luo, Jianmin.,Zhou, Shaochen.,Mao, Xinyou.,Shah, Muhammad Wajid.,...&Wang CY.(2018).TiO2-supported Ag nanoclusters with enhanced visible light activity for the photocatalytic removal of NO.Applied Catalysis B: Environmental,234,206-212.
MLA Duan, Yanyan,et al."TiO2-supported Ag nanoclusters with enhanced visible light activity for the photocatalytic removal of NO".Applied Catalysis B: Environmental 234(2018):206-212.
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