文献类型：期刊文献

英文题名：Au thorn-decorated TiO2 hierarchical microspheres with superior photocatalytic bactericidal activity under red and NIR light irradiation

作者：Wang, Shilin;Han, Yuqing;Luo, Yusheng;Ma, Yunfei;Zhang, Jinlong;Tian, Baozhu[1]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China; East China Univ Sci & Technol, Sch Chem & Mol Engn, Minist Educ,Inst Fine Chem,Feringa Nobel Prize Sc, Key Lab Specially Funct Polymer Mat & Related Tec, Shanghai 200237, Peoples R China

年份：2022

卷号：910

外文期刊名：JOURNAL OF ALLOYS AND COMPOUNDS

收录：;EI(收录号：20221511954107);WOS:【SCI-EXPANDED(收录号:WOS:000793290800002)】；

基金：This work has been supported by the National Natural Science Foundation of China (U1862112 and 21573069), Shanghai Municipal Science and Technology Major Project (2018SHZDZX03), Program of Introducing Talents of Discipline to Universities (B16017), Fundamental Research Funds for the Central Universities (50321041917001 and 50321042017001), and Fundamental Research Funds for the Central Universities (JKD01211701). The authors thank Research Center of Analysis and Test of East China University of Science and Technology for the help on the characterization.

语种：英文

外文关键词：Surface plasmon resonance (SPR); Photocatalysis; Sterilization; Red and NIR light; Reactive species

摘要：Herein, we fabricated a novel surface plasmon resonance (SPR) photocatalyst Au(T)-TiO2(MS) by anchoring Au thorns on TiO2 hierarchical microspheres (MS). It was found that the flower-like TiO2 microspheres with a size of ~800 nm consist of many lamellar petals and the Au thorns with length of dozens of nanometers were anchored on TiO2(MS). By analyzing the DRS, PL spectra, transient photocurrents and electrochemical impedance spectra, it was disclosed that Au thorns not only respond to visible and NIR light but also effectively promote the separation of photogenerated charge carriers in TiO2(MS). The photocatalytic inactivation of E. coli K12 indicated that Au(T)-TiO2(MS) displayed excellent bactericidal activity and stability under red and NIR light irradiation. Due to the special structure of Au(T)-TiO2(MS), it can produce reactive species outside and within bacteria, both of which work together responsible for the inactivation of E. coli K12. The EPR spin-trap measurements with DMPO and reactive species trapping experiments revealed that all of h+, center dot OH and center dot O(2)(-& nbsp;)are produced over Au(T)-TiO2(MS), while center dot O-2(-) and h(+) are the main reactive species for bacterium inactivation. (C) 2022 Published by Elsevier B.V.