Sb2O3/BiOBr复合物的制备及其对RhB的去污作用

doi:10.16085/j.issn.1000-6613.2017.03.050

化工进展 ›› 2017, Vol. 36 ›› Issue (03): 1140-1146.DOI: 10.16085/j.issn.1000-6613.2017.03.050

Sb₂O₃/BiOBr复合物的制备及其对RhB的去污作用

方俊华^1,2, 张凯^1,2, 张伟^1,2, 王中源^1,2

1 三峡库区生态环境教育部重点实验室, 重庆 400045;
2 重庆大学城市建设与环境工程学院, 重庆 400045

收稿日期:2016-07-26 修回日期:2016-09-13 出版日期:2017-03-05 发布日期:2017-03-05
通讯作者: 方俊华(1965-),男,副教授,博士,硕士生导师,研究方向为水污染控制理论与技术、环保材料等。
作者简介:方俊华(1965-),男,副教授,博士,硕士生导师,研究方向为水污染控制理论与技术、环保材料等。E-mail:fangjunhua@cqu.edu.cn。
基金资助:
国家“水体污染控制与治理”科技重大专项项目（2012ZX07307-001）。

Preparation of novel Sb₂O₃/BiOBr composite and decontamination of RhB

FANG Junhua^1,2, ZHANG Kai^1,2, ZHANG Wei^1,2, WANG Zhongyuan^1,2

1 Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing 400045, China;
2 Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, China

Received:2016-07-26 Revised:2016-09-13 Online:2017-03-05 Published:2017-03-05

摘要/Abstract

摘要：

为了进一步提高BiOBr在可见光范围内的光催化性能，通过简单的低温液相法制备了不同质量掺杂比的三氧化二锑/溴氧化铋（Sb₂O₃/BiOBr）复合光催化材料。利用X射线衍射仪（XRD）、扫描电镜形貌分析（SEM）、X射线光电子能谱（XPS）、紫外-可见光漫反射（UV-Vis/DRS）、透射电子显微镜（TEM）等对材料进行了表征，并以罗丹明B（RhB）为目标污染物，在模拟可见光条件下研究了复合物对RhB的光催化降解性能。结果表明，Sb₂O₃的掺杂显著提高了复合物的吸附能力；同时，Sb₂O₃的掺杂促进了BiOBr表面羟基（OH-）的产生，该基团能够有效捕获空穴（h⁺），从而提高光催化活性。当Sb₂O₃掺杂量为3%（质量分数）时降解效果最佳，60min内RhB的降解率比纯相BiOBr提高了20.03%，达到了95.41%。多次重复实验，复合物的光催化性能并没有发生明显的减弱，表明复合物同时也具有较好的稳定性。

关键词: 三氧化二锑/溴氧化铋复合物, 低温液相法, 可见光催化, 吸附, 罗丹明B, 羟基自由基

Abstract:

Different doping mass ratio of Sb₂O₃/BiOBr composite photocatalytic material were synthesized via a facile low-temperature liquid-phase method to further enhance visible-light photocatalytic activity. The microstructure and properties of Sb₂O₃/BiOBr composites were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),X-ray photoelectron spectroscopy(XPS),UV-Vis/DRS spectrophotometer techniques,transmission electron microscope (TEM). The photocatalytic activities of Sb₂O₃/BiOBr nanoparticles were evaluated by the degradation of Rhodamine B (RhB). Doping of Sb₂O₃ significantly improve the adsorption capacity of the composite. At the same time,the generation of the BiOBr surface hydroxyl groups,which could availably capture the photon-generated hole,thus improving the photocatalytic activity of TiO₂. The 3% doping mass ratio Sb₂O₃/BiOBr composite photocatalyst was found to have the highest photocatalytic activity,and was 20.03% higher than the pure BiOBr under visible light irradiation in 60min,reached 95.41%. After several cycles,the composite showed no apparent decrease in activity, whichshows the composite also have good stability.

Key words: Sb₂O₃/BiOBr composite, low-temperature liquid-phase method, visible light photocatalysis, adsorption, RhB, hydroxyl radicals

中图分类号:

X703

方俊华, 张凯, 张伟, 王中源. Sb₂O₃/BiOBr复合物的制备及其对RhB的去污作用[J]. 化工进展, 2017, 36(03): 1140-1146.

FANG Junhua, ZHANG Kai, ZHANG Wei, WANG Zhongyuan. Preparation of novel Sb₂O₃/BiOBr composite and decontamination of RhB[J]. Chemical Industry and Engineering Progress, 2017, 36(03): 1140-1146.

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Sb₂O₃/BiOBr复合物的制备及其对RhB的去污作用

Preparation of novel Sb₂O₃/BiOBr composite and decontamination of RhB

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