Bismuth silicate photocatalysts with enhanced light harvesting efficiency by photonic crystal

被引：36
作者：
Wu, Yuanting [1 ]
Lu, Jian [1 ]
Li, Menglong [1 ]
Yuan, Jun [1 ]
Wu, Penghong [1 ]
Chang, Xiaojing [1 ]
Liu, Changqing [1 ]
Wang, Xiufeng [1 ]
机构：
[1] Shaanxi Univ Sci & Technol, Sch Mat Sci & Engn, Shaanxi Key Lab Green Preparat & Functionalizat I, Xian 710021, Shaanxi, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 810卷
基金：
中国国家自然科学基金;
关键词：
Bismuth silicate; Photonic crystal; Photon localization; Pholocatalyst; RHODAMINE-B; DEGRADATION; MECHANISM; LOCALIZATION; NANOSHEETS; GE;
D O I：
10.1016/j.jallcom.2019.151839
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：
Bismuth silicate (Bi2SiO5 and Bi12SiO20, BSO) films were aimed to grow uniformly on SiO2 photonic crystal (SPC) via spin-coating. The as-prepared BSO-SPC exhibited better photocatalytic decomposition of Rhodamine B (RhB) than that of the ordinary BSO film under ultraviolet (UV) irradiation. The improvement of photocatalytic activity of BSO can be attributed to the enhancement of light harvesting efficiency by SPC. The results show that the photon localization of SPC plays an important role in enhancing the light absorption of BSO. The influences of the particle diameter of SiO2, the thickness of both SPC and BSO layer on the photon localization of SPC were investigated. This work provides a simple method to improve the light harvesting efficiency of photocatalyst and extends the application of photonic crystal. In addition, the recovery and reuse of immobilized BSO-SPC photocatalyst make it more suitable for practical application. (C) 2019 Elsevier B.V. All rights reserved.
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页数：8
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