Page 126 - 《精细化工》2021年第9期

第 38 卷第 9 期 精 细 化 工 Vol.38, No.9
202 1 年 9 月 FINE CHEMICALS Sept. 2021

催化与分离提纯技术
Bi S /CNFs 复合材料制备及其光催化性能
2 3

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汪鸣凤 ，申久英 ，彭 蕾 ，刘润雨 ，刘心中 ，席北斗
〔1. 福建工程学院 生态环境与城市建设学院，福建 福州 350000；2. 澳蓝（福建）实业有限公司，福
建 福州 350000；3. 中国环境科学研究院，北京 100012〕
摘要：采用水热法制备硫化铋（Bi 2 S 3 ）和活性纳米碳纤维掺杂硫化铋复合材料（Bi 2 S 3 /CNFs），以降解水溶液中
甲硝唑（MTZ）抗生素。通过 XRD、SEM、TEM、FTIR、XPS、UV-Vis 和 PL 等对样品的晶型、形貌、结构、
元素组成、表面官能团、光学性质进行了表征。结果表明，活性纳米碳纤维（CNFs）引入 Bi 2 S 3 中，可降低光
生电子-空穴对的复合速率，提高其光催化活性。在可见光照射下，考察了 Bi 2 S 3 /CNFs 复合材料光催化降解 MTZ
的活性，发现 CNFs 掺量为 47%（以 Bi 2 S 3 质量计，下同）、MTZ 质量浓度为 10 mg/L ，复合材料用量为 60 mg
时，Bi 2 S 3 /CNFs 复合材料光催化性能优异，在 3 h 内，MTZ 的降解率为 92%。Bi 2 S 3 /CNFs 复合材料在 3 次循环
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后也表现出良好的稳定性和可回收性。活性基团捕获实验表明，羟基自由基（•OH）、光生空穴（h ）和超氧自
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由基（•O 2 ）参与了 Bi 2 S 3 /CNFs 对 MTZ 的降解，而•OH 和 h 是该体系的主要活性组分，并在此基础上初步探讨
了光催化反应机理。
关键词：Bi 2 S 3 ；CNFs；光催化；甲硝唑降解；自由基；催化技术
中图分类号：O643.36；O644.1；X703 文献标识码：A 文章编号：1003-5214 (2021) 09-1840-08

Preparation and photocatalytic properties of Bi 2S 3/CNFs composite materials

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WANG Mingfeng , SHEN Jiuying , PENG Lei , LIU Runyu , LIU Xinzhong , XI Beidou
[1. School of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou 350000, Fujian,
China; 2. Aolan (Fujian) Industrial Co., Ltd., Fuzhou 350000, Fujian, China; 3. Chinese Research Academy of
Environmental Sciences, Beijing 100012, China]
Abstract: Bismuth sulfide (Bi 2S 3) and activated carbon nanofiber doped bismuth sulfide (Bi 2S 3/CNFs)
composite materials were prepared by the hydrothermal method and used to remove metronidazole (MTZ)
from the aqueous solution. The crystal form, morphology, structure, elemental composition, surface
functional groups and optical properties of the samples were characterized by XRD, SEM, TEM,FTIR,XPS,
UV-Vis and PL. The results showed that the introduction of active carbon nanofibers (CNFs) into Bi 2S 3
could reduce the recombination rate of photogenerated electron-hole pairs and improve their photocatalytic
activity. The photocatalytic degradation of MTZ by Bi 2S 3/CNFs composite materials was evaluated under
visible light irradiation. It was found that the photocatalytic activity of Bi 2S 3/CNFs composite material was
excellent and the removal rate of MTZ was 92% within 3 h When the content of CNFs was 47% (based on
the mass of Bi 2S 3, the same below), the mass concentration of MTZ was 10 mg/L, and the amount of
composite material was 60 mg. This Bi 2S 3/CNFs composite material also showed good stability and
recoverability after three cycles. The active group capture experiments showed that hydroxyl radical (•OH),
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photogenerated hole (h ) and superoxide radical (•O 2 ) were involved in the degradation of MTZ on
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Bi 2S 3/CNFs, and •OH and h were the main active components of the system. The photocatalytic reaction
mechanism was discussed.
Key words: Bi 2S 3; CNFs; photocatalysis; metronidazole degradation; radicals; catalysis technology

收稿日期：2021-03-06; 定用日期：2021-05-17; DOI: 10.13550/j.jxhg.20210233
基金项目：国家重点研发计划课题（2019YFC1904103）
作者简介：汪鸣凤（1996—），女，硕士生，E-mail：1120608002@qq.com。联系人：刘心中（1963—），男，教授，E-mail：liuxinzh01@
163.com；席北斗（1969—），男，研究员，E-mail: xibeidou@263.net。