Page 198 - 《精细化工》2022年第11期

第 39 卷第 11 期 精 细 化 工 Vol.39, No.11
2022 年 11 月 FINE CHEMICALS Nov. 2022

水处理技术与环境保护
3D 球状 BiOI 耦合过一硫酸盐可见光降解金橙Ⅱ

*
张舒萌，成先雄 ，连军锋，王 磊，苏浩杰，刘 鑫
（江西理工大学 赣江流域水质安全保障工程技术研究中心，江西 赣州 341000）

摘要：以 Bi(NO 3 ) 3 •5H 2 O 和 KI 为原料，乙二醇为溶剂，采用溶剂热法通过水热温度的控制对 BiOI 进行形貌调
控，制备了 3D 球状 BiOI 光催化剂。通过 SEM、EDS、XRD、UV-Vis 对其结构进行了表征，将 BiOI 与过一硫
酸盐（PMS）耦合在可见光下降解金橙Ⅱ，探究了 BiOI 投加量、PMS 投加量、金橙Ⅱ质量浓度、pH 及常见阴
离子对降解体系的影响。结果显示，BiOI 具有良好的可见光响应性能，禁带宽度约为 1.8 eV，在 BiOI 投加量为
0.2 g/L、PMS 浓度为 0.2 mmol/L、金橙Ⅱ质量浓度为 100 mg/L 时降解效率最好，高达 97.0%，降解过程符合准
–
二级动力学模型。降解过程中可见光激发 BiOI 产生光生载流子，一方面光生载流子与 PMS 反应，生成•SO 4 和
–
–
+
1
•OH，另一方面光生载流子与体系中的溶解氧反应生成•O 2 ，•O 2 与 H 2 O 中 H 反应生成单线态氧（ O 2 ），同时 PMS
–
1
1
自分解产生 O 2 ，说明降解过程是多途径的非均相反应，•O 2 、 O 2 是降解过程中的主要自由基。
关键词：BiOI；过硫酸盐；可见光催化；光生电子空穴对；金橙Ⅱ；水处理技术
中图分类号：X703 文献标识码：A 文章编号：1003-5214 (2022) 11-2348-07
Degradition of orange Ⅱ by 3D spherical BiOI coupled with
activated persulfate under visible light

*
ZHANG Shumeng, CHENG Xianxiong , LIAN Junfeng, WANG Lei, SU Haojie, LIU Xin
（Research Center for Water Quality Security Technology at Ganjiang River Basin, Jiangxi University of Science and
Technology, Ganzhou 341000, Jiangxi, China）

Abstract: 3D spherical BiOI photocatalyst, which was prepared from Bi(NO 3) 3•5H 2O, KI and ethylene
glycol via solvothermal method with morphology controlled by hydrothermal temperature and structure
characterized by SEM, EDS, XRD and UV-Vis, was coupled with persulfate (PMS) to degrade orange Ⅱ
under visible light. The effects of BiOI dosage, PMS dosage, orange Ⅱ mass concentration, pH and
common anions on degradation system were investigated. The results showed that BiOI had a good visible
light response with a band gap of ~1.8 eV. The degradation efficiency of orange Ⅱ with a mass
concentration of 100 mg/L reached 97.0% when BiOI dosage was 0.2 g/L and PMS dosage was 0.2 mmol/L
respectively. The degradation process fitted to the quasi-second-order kinetic model. Photogenerated
–
carriers, generated by BiOI upon visible light excitation, reacted with PMS to produce •SO 4 and •OH, while,
–
at the same time, it reacted with dissolved oxygen in the system to generate •O 2 , which further reacted with
1
+
1
H in H 2O to generate singlet oxygen ( O 2). Meanwhile, O 2 was also produced by PMS self-decomposition.
–
All these demonstrated that the degradation process was a multi-channel heterogeneous reaction with •O 2
1
and O 2 the main free radicals.
Key words: BiOI; persulfate; visible light catalysis; photogenerated electron hole pair; orange Ⅱ; water
treatment technology
偶氮染料广泛应用于造纸、纺织、皮革、塑料、 然色素分子之间有一个或多个强偶氮键，导致其稳
[2]
[1]
医药和食品加工领域 ，其结构中的发色基团和天 定性高，难以降解 。染料废水的色度还会干扰浮

收稿日期：2022-02-28; 定用日期：2022-06-06; DOI: 10.13550/j.jxhg.20220172
基金项目：国家自然科学基金青年科学基金（51808268）
作者简介：张舒萌（1998—），女，硕士生，E-mail：zhangshumengme@126.com。联系人：成先雄（1977—），男，副教授，E-mail：
2233950601@qq.com。