工业水处理 ›› 2024, Vol. 44 ›› Issue (9): 136-142. doi: 10.19965/j.cnki.iwt.2023-0939

• 试验研究 • 上一篇    下一篇

Cd(OH)2/BiOCl复合材料的制备及其光催化性能

代佳汐1,2(), 姜建辉1,2, 韩宇凡1,2, 张文涛1,2, 田明霞1,2(), 张园1,2()   

  1. 1. 新疆兵团南疆化工资源利用工程实验室, 新疆 阿拉尔 843300
    2. 塔里木大学化学化工学院, 新疆 阿拉尔 843300
  • 收稿日期:2024-07-10 出版日期:2024-09-20 发布日期:2024-09-26
  • 作者简介:

    代佳汐(2003— ),本科。E-mail:

    田明霞,讲师,E-mail:

    张园,讲师,E-mail:

  • 基金资助:
    大学生创新创业训练计划项目(202210757028); 兵团财政科技计划资助项目(2021CB014)

Preparation and photocatalytic performance of Cd(OH)2/BiOCl composite materials

Jiaxi DAI1,2(), Jianhui JIANG1,2, Yufan HAN1,2, Wentao ZHANG1,2, Mingxia TIAN1,2(), Yuan ZHANG1,2()   

  1. 1. Engineering Laboratory of Chemical Resources Utilization in South Xinjiang of Xinjiang Production and Construction Corps, Alar 843300, China
    2. College of Chemistry and Chemical Engineering, Tarim University, Alar 843300, China
  • Received:2024-07-10 Online:2024-09-20 Published:2024-09-26

摘要:

BiOCl是一种良好的光催化剂,但光生电子-空穴对易复合限制了其在光催化领域的应用。采用一步水热法制备了Cd(OH)2/BiOCl复合材料,以罗丹明B(RhB)为降解目标,考察了复合材料的光催化性能。利用XRD、FT-IR、SEM、XPS(X射线光电子能谱)、光致发光光谱(PL)、电子自旋共振光谱(ESR)、紫外可见漫反射光谱(UV-Vis DRS)等手段对复合材料进行了表征,从表征结果发现,Cd(OH)2与BiOCl复合后,复合材料呈片状球形花状结构,且Cd(OH)2的引入使复合材料产生了新的能级,电荷分离和传输能力增强,光生电子-空穴对的复合得到明显抑制,从而提高了复合材料的光催化性能。在300 W氙灯照射下,Cd(OH)2/BiOCl复合材料对RhB的去除率较纯BiOCl提高了15.36%,经5次循环利用后复合材料对RhB的去除率仍可保持在70%。自由基清除实验表明自由基的活性顺序为O2 ·->h+>·OH,且O2 ·-是主要活性物质。

关键词: Cd(OH)2/BiOCl, 光催化性能, 罗丹明B, 催化机理

Abstract:

BiOCl is a good photocatalyst, but the easy recombination of photo generated electron-hole pairs limits its application in the field of photocatalysis. Cd(OH)2/BiOCl composite materials were prepared by one-step hydrothermal method, and its photocatalytic performance was investigated with Rhodamine B(RhB) as the degradation target. The composite materials were characterized by XRD, FT-IR, SEM, XPS, PL, ESR, UV-Vis DRS and other methods. It was found that the composite materials of Cd(OH)2/BiOCl exhibited a sheet-like spherical flower-like structure, and the introduction of Cd(OH)2 generated new energy levels in the composite material, with enhanced charge separation and transport capabilities, and significantly suppressed the recombination of photo generated electron-hole pairs, which improved the photocatalytic performance of the composite materials. Under 300 W xenon lamp irradiation, the removal rate of RhB by Cd(OH)2/BiOCl composite materials increased by 15.36% compared to pure BiOCl. After 5 cycles of utilization, the removal rate of RhB by the composite materials could still be maintained at 70%. The free radical scavenging experiment showed that the activity order of free radicals was O2 ·->h+>·OH, with O2 ·- being the main active substance.

Key words: Cd(OH)2/BiOCl, photocatalytic performance, RhB, catalytic mechanism

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