Singlet oxygen generation boosted by Ag-Pt nanoalloy combined with disordered surface layer over TiO2 nanosheet for improving the photocatalytic activity

被引：24

作者：

Chen, Qifeng ^{[1
]}

Wang, Keyan ^{[1
]}

Gao, Guoming ^{[1
]}

Ren, Jinzhi ^{[1
]}

Duan, Ran ^{[3
]}

Fang, Yanfen ^{[2
]}

Hu, Xun ^{[1
]}

机构：

[1] Univ Jinan, Sch Mat Sci & Engn, Nanxinzhuang West Rd 336, Jinan 250022, Shandong, Peoples R China

[2] Three Gorges Univ, Coll Biol & Pharmaceut Sci, Yichang 443002, Hubei, Peoples R China

[3] Chinese Acad Sci, Inst Chem, Zhongguancun North First St 2, Beijing 100190, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2021年 / 538卷

基金：

中国国家自然科学基金;

关键词：

Molecular oxygen activation; Singlet oxygen; Ag-Pt nanoalloy; Disordered surface layer; TiO2; nancomposite; HYBRID NANOSTRUCTURES; SELECTIVE OXIDATION; ALLOY NANOPARTICLES; HYDROGEN EVOLUTION; AEROBIC OXIDATION; PERFORMANCE; PALLADIUM; GOLD; CATALYSTS; VACANCIES;

D O I：

10.1016/j.apsusc.2020.147944

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The activation of molecular oxygen with photoinduced charge carriers are highly vital in photocatalysis. Here, the synergetic effects of disordered surface layer and Ag-Pt nanoalloy over TiO2 nanosheet on the improved photocatalytic activity was proposed. The nanocomposites exhibited enhanced photocatalytic performance in selective oxidation of benzylamine to imine under UV-visible irradiation. More importantly, the synergetic effect of nanoalloy and surface oxygen vacancy boosted the generation of singlet oxygen in the selective oxidation of benzylamine. The regulation of thickness of disordered surface layer and composition of Ag-Pt nanoalloy over nanosheet TiO2 promoted the separation efficiency and mobility of charge carriers, resulted from the changed electronic structure of surface layer and nanoalloy. These findings provide an avenue for the design of nano-composite photocatalysts combined defect engineering and nanoalloy modification to improve the photocatalytic activity.

引用

页数：11

共 54 条

[51] Strong interactions between Au nanoparticles and TiO2 mesocrystal: highly selective photocatalytic reduction of nitroarenes [J].

Yan, Ziran ;

Chen, Qifeng ;

Xia, Ping ;

Ma, Wenxin ;

Ren, Baosheng .

NANOTECHNOLOGY, 2016, 27 (03)

[52] Singlet Oxygen Triggered by Superoxide Radicals in a Molybdenum Cocatalytic Fenton Reaction with Enhanced REDOX Activity in the Environment [J].

Yi, Quying ;

Ji, Jiahui ;

Shen, Bin ;

Dong, Chencheng ;

Liu, Jun ;

Zhang, Jinlong ;

Xing, Mingyang .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2019, 53 (16) :9725-9733

[53]

Zhang HJ, 2012, NAT MATER, V11, P49, DOI [10.1038/NMAT3143, 10.1038/nmat3143]

[54] Amorphous Materials for Enhanced Localized Surface Plasmon Resonances [J].

Zhu, Chuanhui ;

Xu, Qun .

CHEMISTRY-AN ASIAN JOURNAL, 2018, 13 (07) :730-739

← 1 2 3 4 5 6 →