Cs-doped α-Bi2O3 microplates: Hydrothermal synthesis and improved photochemical activities

被引：32
作者：
Huang, Yanlin [1 ]
Qin, Jie [1 ]
Hu, Changhao [1 ]
Liu, Xuanxuan [1 ]
Wei, Donglei [2 ,3 ]
Seo, Hyo Jin [2 ,3 ]
机构：
[1] Soochow Univ, Coll Chem Chem Engn & Mat Sci, Suzhou 215123, Peoples R China
[2] Pukyong Natl Univ, Dept Phys, Busan 608737, South Korea
[3] Pukyong Natl Univ, Interdisciplinary Program Biomed Engn, Busan 608737, South Korea
来源：
APPLIED SURFACE SCIENCE | 2019年 / 473卷
基金：
新加坡国家研究基金会;
关键词：
Photocatalysis; Semiconductor; Optical properties; Microstructures; VISIBLE-LIGHT; PHOTOCATALYTIC ACTIVITY; BI2O3; TIO2; LUMINESCENCE; DEGRADATION; NANOPARTICLES; PERFORMANCE; FABRICATION; MORPHOLOGY;
D O I：
10.1016/j.apsusc.2018.12.165
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：
Cs-doped alpha-Bi2O3 was synthesized via a facile hydrothermal reaction. The phase formations of the samples were investigated via X-ray powder diffraction (XRD) patterns and structural refinements. The samples present well-crystalized microplates with smooth surfaces and a thickness about 300 nm. The experiments revealed that the undoped and Cs-doped alpha-Bi2O3 microplates could crystallized in a pure monoclinic phase. The band gap of alpha-Bi2O3 could be reduced via the Cs-doping in the lattices. The photocatalytic activity on photo-degradation of methylene blue (MB) was significantly improved with the Cs-doping. The effective photocatalysis was discussed on the improved visible-light response, the enhanced dispersion in the valence band composed of hybrid orbitals of Bi6s, O2p and Cs3d, and the lowered electron-hole recombination.
引用
收藏
页码：401 / 408
页数：8
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