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过程工程学报 ›› 2016, Vol. 16 ›› Issue (2): 323-329.DOI: 10.12034/j.issn.1009-606X.215355

• 材料工程专栏 • 上一篇    下一篇

SDBS辅助合成Y2O3/Ag3VO4光催化剂及其催化可见光降解罗丹明B

覃利琴 庞起 陶萍芳 陈渊 唐连东   

  1. 玉林师范学院化学与材料学院 广西大学化学化工学院 玉林师范学院化学与材料学院 玉林师范学院化学与材料学院 玉林师范学院化学与材料学院
  • 收稿日期:2015-10-20 修回日期:2015-12-25 出版日期:2016-04-20 发布日期:2016-12-22
  • 通讯作者: 覃利琴

SDBS-assisted Synthesis of Y2O3/Ag3VO4 Photocatalyst and Its Photocatalytic Activity for Degradation of Rhodamine B under Visible Light Irradiation

QIN Li-qin PANG Qi TAO Ping-fang CHEN Yuan TANG Lian-dong   

  1. College of Chemistry and Material, Yulin Normal University School of Chemistry and Chemical Engineering, Guangxi University College of Chemistry and Material, Yulin Normal University College of Chemistry and Material, Yulin Normal University College of Chemistry and Material, Yulin Normal University
  • Received:2015-10-20 Revised:2015-12-25 Online:2016-04-20 Published:2016-12-22
  • Contact: QIN Li-qin

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摘要： 以V2O5, AgNO3和Y(NO3)3×6H2O为原料、十二烷基苯磺酸钠为辅助剂，采用直接沉淀法和浸渍法制备单斜晶相Ag3VO4和Y2O3/Ag3VO4复合催化剂，表征了产物的结构和形貌，并分析了其形成机理；在可见光下研究了其催化可见光降解罗丹明B(RhB)的性能. 结果表明，所得Y2O3/Ag3VO4复合催化剂吸收边相对纯相Ag3VO4发生红移，禁带宽度减小至1.83 eV，电子-空穴对复合几率降低，对RhB有较好的可见光催化活性和稳定性，可见光照射15 min后，0.08 g 3% Y2O3/Ag3VO4催化200 mL 8 mg/L RhB溶液的降解率达94.2%.

关键词: Y2O3/Ag3VO4光催化剂, 可见光, 十二烷基苯磺酸钠, 降解, 罗丹明B, 稳定性

Abstract: Ag3VO4 and Y2O3/Ag3VO4 photocatalysts were synthesized by precipitation and impregnation with the assistant of sodium dodecylbenzene sulfonate (SDBS), and V2O5, AgNO3 and Y(NO3)3×6H2O as raw materials, their structure and morphology characterized, and the synthesis mechanism was analyzed. The results showed that the absorption edge of Y2O3/Ag3VO4 was red-shifting, and the energy gap was 1.83 eV with SDBS assistance. The synthesized Y2O3/Ag3VO4 showed excellent photocatalytic activity and stability for degradation of rhodamine B (RhB) because of the adsorption enrichment of benzene and effective separation of photogenerated electron-hole pair. The degradation rate of 8 mg/L RhB in 200 mL solution was 94.2% by 0.08 g 3%Y2O3/Ag3VO4 in 15 min illumination.

Key words: Y2O3/Ag3VO4 photocatalyst, visible light, sodium dodecylbenzene sulfonate, degradation, rhodamine B, stability

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