化工学报 ›› 2020, Vol. 71 ›› Issue (8): 3602-3613.DOI: 10.11949/0438-1157.20191475

• 催化、动力学与反应器 • 上一篇    下一篇

一步水热合成In2S3/CdIn2S4异质结微球及其光催化性能

张开莲1(),杨凯1,4(),李笑笑1,梁若雯2,管婕1,李文强1,黄健1,余长林3(),戴文新4()   

  1. 1.江西理工大学化学化工学院,江西 赣州 341000
    2.宁德师范学院绿色能源与环境催化福建省高校重点实验室,福建 宁德 352100
    3.广东石油化工学院环境科学与工程学院,广东 茂名 525000
    4.福州大学能源与环境光催化国家重点实验室,福建 福州 350108
  • 收稿日期:2019-12-05 修回日期:2020-06-02 出版日期:2020-08-05 发布日期:2020-08-05
  • 通讯作者: 杨凯,余长林,戴文新
  • 作者简介:张开莲(1994—),女,硕士研究生,2068058875@qq.com
  • 基金资助:
    国家自然科学基金项目(21962006);江西省自然科学基金重点项目(20192ACBL21011);江西理工大学清江优秀人才支持计划项目;江西省自然科学基金项目(20181BAB213010);福州大学国家重点实验室开放基金项目(SKLPEE-KF201712);宁德师范学院绿色能源与环境催化福建省高校重点实验室基金项目(FJ-GEEC201901);广东石油化工学院环境重点实验室开放基金项目(2018B030322017)

One-step hydrothermal synthesis of In2S3/CdIn2S4 heterojunction microsphere and its photocatalytic performance

Kailian ZHANG1(),Kai YANG1,4(),Xiaoxiao LI1,Ruowen LIANG2,Jie GUAN1,Wenqiang LI1,Jian HUANG1,Changlin YU3(),Wenxin DAI4()   

  1. 1.College of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
    2.Key Laboratory of Green Energy and Environment Catalysis, Fujian Province University, Ningde Normal University, Ningde 352100, Fujian, China
    3.School of Environmental and Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, Guangdong, China
    4.State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350108,Fujian, China
  • Received:2019-12-05 Revised:2020-06-02 Online:2020-08-05 Published:2020-08-05
  • Contact: Kai YANG,Changlin YU,Wenxin DAI

摘要:

利用一步水热法成功制备了In2S3/CdIn2S4异质结微球催化剂,通过降解甲基橙(MO)、酸性橙Ⅱ(AOⅡ) 和罗丹明B(RhB)来评价所制备催化剂的活性。实验结果表明,In2S3/CdIn2S4异质结微球对MO、AOⅡ和RhB的光催化降解率分别达到了87%、75%和96%,明显高于催化剂In2S3和CdIn2S4。瞬态光电流和阻抗测试结果表明,In2S3/CdIn2S4异质结微球受光激发产生的电子空穴对能快速得到分离。捕获主要活性物种实验表明,该反应体系中主要是超氧自由基和空穴起关键性作用。In2S3/CdIn2S4异质结微球催化剂重复使用四次,其催化能力依然保持较高水平。In2S3/CdIn2S4异质结微球活性的增强归因于异质结的形成有助于电子的转移,从而降低了电子空穴对的复合概率。并且合适的能带结构有助于产生大量的光生电子,电子与活性氧的结合最终引起氧化能力的增强。

关键词: In2S3/CdIn2S4, 一步水热法, 异质结, 降解, 自由基

Abstract:

In2S3/CdIn2S4 heterojunction microspheres were successfully prepared by one-step hydrothermal method, and then the photocatalytic performances were evaluated by the photocatalytic degradation of MO, AOⅡ and RhB. The consequence presented that the photocatalytic activity of In2S3/CdIn2S4 was significantly higher than those of In2S3 and CdIn2S4 catalysts, which could decompose 87%中MO, 75% AOⅡ and 96% RhB, respectively. The photogenerated electrons and holes could be separated quickly over In2S3/CdIn2S4 heterojunction microspheres, drawing a conclusion from transient photocurrent response and impedance test. The experiments captured by the main active radicals showed that the superoxide radicals and holes played a key irreplaceable role in the reaction system. Meanwhile, the stability is still at a high level after four successive cycles over In2S3/CdIn2S4 heterojunction microspheres. The enhancing activity can attribute to the heterojunction, which can contribute to the electron transfer and conclusively suppress the recombination of the electrons/holes pairs. In addition, a suitable energy band structure helps to generate a large number of photo-generated electrons, and the combination of electrons and active oxygen ultimately leads to the enhancement of oxidation ability.

Key words: In2S3/CdIn2S4, one-step hydrothermal method, heterojunction, degradation, radicals

中图分类号: