One-pot preparation of Bi6O6(OH)3(NO3)3•1.5H2O (BBN)/Bi0.5O0.5ClxBr0.5-X heterostructure with improved photocatalytic activity

被引：6

作者：

Qiang, Lina ^{[1
]}

Li, Guishui ^{[1
]}

Hu, Xumin ^{[1
]}

Tian, Wei ^{[1
]}

机构：

[1] Tianjin Univ Sci & Technol, Sch Mech Engn, Key Lab Integrated Design & On Line Monitoring Li, Tianjin 300222, Peoples R China

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2018年 / 367卷

基金：

中国国家自然科学基金;

关键词：

Basic bismuth nitrate; Bi0.5O0.5ClxBr0.5-X; Photocatalytic; Composite materials; Semiconductors; RHODAMINE-B; DEGRADATION; COMPOSITE; MECHANISM; CL; MICROSPHERES; BIOCL; BIOBR; WATER;

D O I：

10.1016/j.jphotochem.2018.08.043

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 novel basic bismuth (III) nitrate (BBN)/Bi0.5O0.5ClxBr0.5-x heterostructure photocatalyts were rust prepared by using a simple one-pot hydrothermal route. The samples were characterized by using SEM, TEM, XRD, XPS, BET, PL and UV-vis diffuse methods. And the photocatalytic performance of BBN/Bi0.5O0. 5CIxBr0.5-x was evaluated with the decoloration of Rhodamine B (RhB) aqueous solution. Compared with pure BBN and Bi0.5O0.5ClxBr0.5-x, the BBN/Bi0.5O0 .5CIxBr0.5-x composites possessed the higher photocatalytic activity under simulated sunlight irradiation. The results indicated that the BBN-BiOCl0.6Br0.4 composite exhibited the highest photocatalytic property under the simulated solar light irradiation. The improvement of photocatalytic activity could be ascribed to the increased visible light absorption and the improved electron-hole pairs effective separation. Moreover, the holes (h(+)) and the superoxide radical (O.-(2)) were considered as the main active substances in the process of photodegradation. Last, the reasonable photocatalytic mechanism was discussed to explain the process.

引用

页码：375 / 383

页数：9

共 42 条

[1] PREDICTION OF FLATBAND POTENTIALS AT SEMICONDUCTOR-ELECTROLYTE INTERFACES FROM ATOMIC ELECTRONEGATIVITIES [J].