| BiOCl/聚苯胺的制备及其光催化降解罗丹明B性能 | |
| Preparation and photocatalytic degradation performance of rhodamine B of BiOCl/polyaniline | |
| 摘要: 采用原位聚合法制备了氯氧化铋(BiOCl)与聚苯胺(PANI)复合的Ⅱ型异质结光催化剂BiOCl/PANI，并采用X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)、透射电子显微镜(TEM)、X射线光电子能谱(XPS)、紫外可见漫反射光谱(UV-Vis DRS)和N2吸附-脱附测试等多种技术手段对其进行了表征，考察了BiOCl/PANI在模拟可见光下对罗丹明B (RhB)的光催化降解性能。实验结果表明：BiOCl/PANI催化剂比PANI和BiOCl具有更高的光催化活性，在RhB质量浓度为50 mg·L-1、PANI与BiOCl的物质的量之比为0.02∶1、50 mg·L-1的催化剂条件下，所制备的BiOCl/PANI光催化150 min后，RhB降解率为98.8%，速率常数为0.031 min-1；经过4次循环实验后，RhB降解率从98.8%降低至98.4%，表现出良好的稳定性和可重复利用性。光催化剂BiOCl/PANI实现了电子和空穴对的快速分离，降低了二者在催化剂内部的复合速率，提高了光催化性能。 | |
| 关键词: 光催化 Ⅱ型异质结 BiOCl/polyaniline 罗丹明B | |
| 基金项目: 内蒙古自治区自然科学基金(No.2021BSO2004)、内蒙古工业大学博士科研启动项目(No.BS2020035)和内蒙古工业大学自然科学项目(No.ZZ202011)资助。 | |
| Abstract: The catalysts of bismuth oxychloride (BiOCl) and polyaniline (PANI) were prepared by in-situ polymerization, resulting in the formation of a type Ⅱ heterojunction photocatalyst (BiOCl/PANI). The catalysts were characterized using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), as well as nitrogen adsorption and desorption techniques. The experimental results show that the BiOCl/PANI catalyst has higher photocatalytic activity than both PANI and BiOCl. Under the conditions of RhB mass concentration 50 mg· L-1, the molar ratio of PANI to BiOCl substance was 0.02∶1, and 50 mg·L-1 catalyst, after 150 min photocatalysis, 98.8% of RhB was degraded by BiOCl/PANI, and the rate constant was 0.031 min-1. After four cycles, the degradation rate of RhB decreased from 98.8% to 98.4%, showing good stability and reusability. The photocatalyst BiOCl/ PANI realizes the rapid separation of electrons and holes, reduces the recombination rate of the two in the catalyst, and improves the photocatalytic performance. | |
| Keywords: photocatalysis Ⅱ-type heterojunction BiOCl/polyaniline rhodamine B | |
| 投稿时间：2024-07-05 修订日期：2025-03-29 | |
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