硫掺杂橄榄状BiVO4上可见光降解亚甲基蓝和甲醛水溶液性能

doi:10.1016/S1872-2067(12)60632-9

催化学报 ›› 2013, Vol. 34 ›› Issue (8): 1617-1626.DOI: 10.1016/S1872-2067(12)60632-9

硫掺杂橄榄状BiVO₄上可见光降解亚甲基蓝和甲醛水溶液性能

赵振璇^a, 戴洪兴^a, 邓积光^a, 刘雨溪^a, 区泽棠^b

a 北京工业大学环境与能源工程学院化学化工系催化化学与纳米科学研究室, 北京100124;
b 香港浸会大学理学院化学系, 香港

收稿日期:2013-03-11 修回日期:2013-06-05 出版日期:2013-08-16 发布日期:2013-07-30
通讯作者: 戴洪兴,区泽棠
基金资助:
国家自然科学基金(21077007); 学科与研究生教育基金(005000541212014); 北京市教委创新团队项目(PHR201107104); 香港浸会大学基金(FRG2/09-10/023).

Effect of sulfur doping on the photocatalytic performance of BiVO₄ under visible light illumination

Zhenxuan Zhao^a, Hongxing Dai^a, Jiguang Deng^a, Yuxi Liu^a, Chak Tong Au^b

a Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China;
b Department of Chemistry and Center for Surface Analysis and Research, Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong, China

Received:2013-03-11 Revised:2013-06-05 Online:2013-08-16 Published:2013-07-30
Supported by:
The work was supported by the National Natural Science Foundation of China (21077007), the Discipline and Postgraduate Education Foundation (005000541212014), the Funding Project for Academic Human Resources Development in Institutions of Higher Learning under the Jurisdiction of Beijing Municipality (PHR201107104), and Hong Kong Baptist University Foundation (FRG2/09-10/023).

摘要/Abstract

摘要： 在无和有S源(Na₂S或硫脲)存在的条件下,采用十二胺辅助的醇-水热法制备了多孔单斜晶相结构的BiVO₄_-δ和不同含量S掺杂的BiVO₄_-δ光催化剂.利用多种手段表征了催化材料的物化性质,评价了它们在可见光照射下催化降解亚甲基蓝或甲醛的反应活性.结果表明,所制光催化剂为单斜白钨矿晶相结构,具有多孔橄榄状形貌,比表面积为8.4-12.5m²/g,带隙能为2.40-2.48eV.在S掺杂BiVO₄_-δ表面同时含有Bi⁵⁺,Bi⁴⁺,V⁵⁺和V⁴⁺物种.S掺杂对BiVO₄_-δ光催化剂的活性影响很大.在可见光下照射下,BiVO₄_-δS_0.08光催化剂对亚甲基蓝和甲醛降解反应显示出最高的光催化活性,这与其较高的表面氧物种浓度和较低的带隙能相关.

关键词: 硫掺杂, 钒酸铋, 可见光催化, 橄榄状形貌, 亚甲基蓝降解, 甲醛水溶液降解

Abstract: Porous monoclinic bismuth vanadate (BiVO₄_-_δ) and sulfur-doped bismuth vanadates (BiVO₄_-_δS_0.05, BiVO₄_-_δS_0.08, and BiVO₄_-_δS_0.12) were synthesized by a dodecylamine-assisted alcohol-hydrothermal route in the absence and presence of thiourea or Na₂S. The physicochemical properties of the materials were characterized and their photocatalytic performance for the degradation of methylene blue and formaldehyde under visible light was evaluated. The samples have a single phase monoclinic scheetlite crystal structure with a porous olive-like morphology, surface areas of 8.4-12.5 m²/g, and bandgap energies of 2.40-2.48 eV. Surface Bi⁵⁺, Bi³⁺, V⁵⁺, and V⁴⁺ species were present on the S-doped BiVO₄_-_δ samples. Sulfur doping influenced the surface Bi⁵⁺/Bi³⁺, V⁵⁺/V⁴⁺, and O_ads/O_latt molar ratios, and the amount of sulfur doped had an important effect on the photocatalytic performance. Under visible light, BiVO₄_-_δS_0.08 performed the best in the photodegradation of methylene blue and formaldehyde. A higher surface oxygen species concentration and a lower bandgap energy were responsible for the excellent visible light photocatalytic performance of BiVO₄_-_δS_0.08.

Key words: Sulfur doping, Bismuth vanadate, Visible-light-driven photocatalyst, Olive-like morphology, Methlyene blue degradation, Formaldehyde degradation

赵振璇, 戴洪兴, 邓积光, 刘雨溪, 区泽棠. 硫掺杂橄榄状BiVO₄上可见光降解亚甲基蓝和甲醛水溶液性能[J]. 催化学报, 2013, 34(8): 1617-1626.

Zhenxuan Zhao, Hongxing Dai, Jiguang Deng, Yuxi Liu, Chak Tong Au. Effect of sulfur doping on the photocatalytic performance of BiVO₄ under visible light illumination[J]. Chinese Journal of Catalysis, 2013, 34(8): 1617-1626.

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硫掺杂橄榄状BiVO₄上可见光降解亚甲基蓝和甲醛水溶液性能

Effect of sulfur doping on the photocatalytic performance of BiVO₄ under visible light illumination

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