Insight into Superior Visible Light Photocatalytic Activity for Degradation of Dye over Corner-truncated Cubic Ag2O Decorated TiO2 Hollow Nanofibers  

作　　者：CHEN Yi-Lan XU Yu-Xian LIN Dai-Feng LUO Yong-Jin XUE Hun CHEN Qing-Hua 陈艺兰;许玉羡;林代峰;罗永晋;薛珲;陈庆华(Fujian Key Laboratory of Pollution Control&Resource Reuse,College of Environment Science and Engineering,Fujian Normal University,Fuzhou 350007,China;School of Ecological Environment and Urban Construction,Fujian University of Technology,Fuzhou 350118,China;Fujian Polytechnic Normal University,Fuqing 350300,China)

机构地区：[1]Fujian Key Laboratory of Pollution Control&Resource Reuse,College of Environment Science and Engineering,Fujian Normal University,Fuzhou 350007,China [2]School of Ecological Environment and Urban Construction,Fujian University of Technology,Fuzhou 350118,China [3]Fujian Polytechnic Normal University,Fuqing 350300,China

出　　处：《Chinese Journal of Structural Chemistry》2020年第3期588-597,380,共11页结构化学（英文）

基　　金：supported by the National Natural Science Foundation of China(21407025);the Natural Science Foundation of Fujian Province(2016J01047);New Century Talent Project of Fujian Province,the Projects of Fujian Provincial Department of Education(JT180350)。

摘　　要：Ag2O/TiO2 heterostructure has been constructed by loading corner-truncated cubic Ag2O on the TiO2 hollow nanofibers via an electrospinning-precipitation method. Compared to individual Ag2O and TiO2, Ag2O/TiO2 heterostructure exhibits obviously enhanced photocatalytic activity for the photodegradation of methyl orange(MO) under visible light irradiation. The composite with molar ratio of Ag2O to TiO2 at 4:10 exhibits the best photocatalytic performance with MO degraded 93% in 6 min. The superior activity is mainly attributed to the surface plasmon resonance(SPR) effect of metallic Ag in-situ produced during the photocatalytic process, which can favor electron transfer to the conduction band of TiO2. This leads to the efficient separation of photogenerated carriers, thus a superior photodegradation activity. Moreover, the energy band alignments of Ag2O/TiO2 heterostructure are calculated, which provides strong support for the proposed mechanism.

关 键 词：visible light photocatalysis corner-truncated CUBIC AG2O TiO2 HOLLOW NANOFIBERS surface plasmon resonance heterostructure 

分 类 号：X703[环境科学与工程—环境工程] O643.3[理学—物理化学] O644.1[理学—化学]