Effects of the molar ratio on the photo-generated charge separation behaviors and photocatalytic activities of (BiO)2CO3-BiOBr composites

被引：13
作者：
Chen, Jiufu [1 ]
Zhong, Junbo [1 ]
Li, Jianzhang [1 ]
Huang, Shentian [1 ]
Xiang, Zhen [1 ]
Li, Minjiao [1 ,2 ]
机构：
[1] Sichuan Univ Sci & Engn, Coll Chem & Environm Engn, Higher Educ Inst Sichuan, Key Lab Green Catalysis, Zigong 643000, Peoples R China
[2] Sichuan Univ Sci & Engn, Sichuan Prov Acad Expert Workstat, Zigong 643000, Peoples R China
来源：
SOLID STATE SCIENCES | 2016年 / 60卷
关键词：
Semiconductor; (BiO)(2)CO3; BiOBr; Photocatalytic activity; Charge separation rate; VISIBLE-LIGHT PHOTOCATALYSIS; ELECTRONIC-STRUCTURE; HOLLOW MICROSPHERES; METHYL-ORANGE; BIOBR; HETEROSTRUCTURE; FABRICATION; BI2O2CO3; REMOVAL; BR;
D O I：
10.1016/j.solidstatesciences.2016.07.011
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The molar ratio of two semiconductors will remarkably influence the photo-induced charge separation behaviors of the composites constructed, thus affecting the corresponding photocatalytic activity. Therefore, it is critical to reveal the relationship between the molar ratio of two semiconductors and the photo-induced charge separation; the information can shed light on the study of nature of surface catalysis. In this work, (BiO)(2)CO3-BiOBr composites were facilely fabricated in-situ through a pore impregnating approach using HBr aqueous solution. The samples were studied by BET, XRD, SEM, UV-Vis DRS and surface photovoltage spectroscopy (SPS). The photocatalytic activities of the samples were evaluated by the discoloration of methyl orange (MO) aqueous solution upon the simulated sunlight illumination. The results reveal that the (BiO)(2)CO3-BiOBr composite with 3/4 M ratio of (BiO)(2)CO3/BiOBr displays the highest photo-induced charge separation rate and photocatalytic activity, the results further manifest that no different electronic transfer property occurs after coupling (BiO)(2)CO3 with BiOBr. (C) 2016 Elsevier Masson SAS. All rights reserved.
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收藏
页码：11 / 16
页数：6
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