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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
Department广州中国科学院沈阳自动化研究所分所
Source PublicationApplied Catalysis B: Environmental
ISSN0926-3373
2018
Volume234Pages:206-212
Indexed BySCI ; EI
EI Accession number20181805129563
WOS IDWOS:000433650000021
Contribution Rank1
Funding OrganizationNational Natural Science Foundation of China ; Guangdong Provincial Science and Technology Project ; Support Scheme of Guangzhou for Leading Talents in Innovation and Entrepreneurship from Guangzhou
KeywordSupported Ag Nanoclusters Photocatalysis No Removal Selective Degradation Visible Light
Abstract

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.

Language英语
WOS SubjectChemistry, Physical ; Engineering, Environmental ; Engineering, Chemical
WOS KeywordFLUORESCENT SILVER NANOCLUSTERS ; QUANTUM CLUSTER ; HIGHLY EFFICIENT ; HIGH SELECTIVITY ; NITROGEN-OXIDES ; CO OXIDATION ; TIO2 ; DEGRADATION ; CATALYSTS ; POLYMER
WOS Research AreaChemistry ; Engineering
Funding ProjectNational 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]
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sia.cn/handle/173321/21840
Collection广州中国科学院沈阳自动化研究所分所
Corresponding AuthorWang F(王富); Chen ZH(陈志鸿); Wang CY(王传义)
Affiliation1.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
Recommended Citation
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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