Noble metal-like behavior of plasmonic Bi particles deposited on reduced TiO2 microspheres for efficient full solar spectrum photocatalytic oxygen evolution

作     者：Hang Zhao Zhangqian Liang Xiang Liu Pengyuan Qiu Hongzhi Cui Jian Tian 赵行;梁嫜倩;刘香;邱鹏源;崔洪芝;田健

作者机构：School of Materials Science and EngineeringShandong University of Science and TechnologyQingdao 266590ShangdongChina 

出 版 物：《Chinese Journal of Catalysis》 (催化学报（英文）)

年 卷 期：2020年第41卷第2期

页      面：333-340页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：the National Natural Science Foundation of China(51872173 and 51772176) Taishan Scholarship of Young Scholars(tsqn201812068) Natural Science Foundation of Shandong Province(ZR2017JL020) Taishan Scholarship of Climbing Plan(tspd20161006) Key Research and Development Program of Shandong Province(2018GGX102028)~~ 

主　　题：Bi nanoparticles Full solar spectrum O2 evolution Photocatalysis Porous microspheres 

摘      要：Herein, novel plasmonic Bi metal in situ deposited in reduced Ti O2 microspheres(Bi@R-Ti O2) are fabricated via a bimetallic MOF-derived synthesized strategy by adjusting the synthesizing temperature. Different characterization techniques, including XRD, SEM, TEM, XPS, DRS, PL, EIS, and photocurrent generation, are performed to investigate the structural and optical properties of the as-prepared samples. The results indicate that the Bi particles are generated inside and outside of reduced Ti O2 microspheres via the reduction of Ti4+ and Bi3+ by ethylene glycol. When the annealing temperature is controlled at 300 o C, the corresponding Bi@R-Ti O2-300 sample with an appropriate amount of Bi nanoparticles exhibits the highest full solar spectrum photocatalytic oxygen evolution activity(4728.709 μmol h–1 g–1), which is 5.9 and 9.5 times higher than that of pure Ti O2 and Bi-Ti bimetal organic frameworks(Bi-Ti-MOFs). Several reasons are suggested for the above results:(1) Bi metal behaves as an electron acceptor to accelerate the charge carrier transfer from Ti O2 to Bi;(2) The surface plasmon resonance effect of loaded metallic Bi particles can enhance the visible and NIR light absorption capacity;(3) The generation of Ti3+ further narrows the band gap of TiO2.