Page 176 - 《精细化工》2021年第5期

第 38 卷第 5 期 精 细 化 工 Vol.38, No.5
202 1 年 5 月 FINE CHEMICALS May 2021

水处理技术与环境保护
花簇状 g-C N /Bi MoO 微球的制备
3
4
6
2
及其光催化降解模拟染料废水

杨 莉，李润泽，张 黎，姜晓雪，王瑞雪，田彬灿

（长安大学 水利与环境学院 旱区地下水文与生态效应教育部重点实验室，陕西 西安 710054）

摘要：以酵母为生物模板，通过水热-牺牲模板法制备了花簇状 g-C 3 N 4 /Bi 2 MoO 6 微球。利用 XRD、SEM、TEM、
FTIR、UV-Vis DRS、光电流响应以及氮气吸附-脱附等手段对样品的晶体结构、微观形貌、光吸收和比表面积
等性能进行了表征，并对样品可见光催化降解亚甲基蓝（MB）模拟染料废水的性能和机理进行了探讨。结果表
明，水热-牺牲模板法可实现 g-C 3 N 4 与 Bi 2 MoO 6 在生物模板表面的成功复合，样品分散性良好，微球直径约为
2
8 μm，表面呈花簇状，比表面积达 11.6007 m /g。可见光下 g-C 3 N 4 负载量为 10%的 g-C 3 N 4 /Bi 2 MoO 6 （以 Bi 2 MoO 6
的质量计，记为 10CN/BM）微球对 MB 模拟染料废水表现出较高的光催化降解活性，当 10CN/BM 添加量为 1 g/L、
可见光照射 140 min 后，初始质量浓度为 15 mg/L 的 MB 废水的降解率高达 96%以上。机理分析证实，微球表
面 g-C 3 N 4 与 Bi 2 MoO 6 形成的 Z 型异质结有效降低了电子-空穴对的复合率，显著提升了对模拟染料废水的可见
光催化性能。
关键词：生物模板法；g-C 3 N 4 ；Bi 2 MoO 6 ；微球；光催化；水处理技术
中图分类号：O643.36；O644.1；X703 文献标识码：A 文章编号：1003-5214 (2021) 05-1030-08

Preparation of flower-like g-C 3N 4/Bi 2MoO 6 microspheres and their
photocatalytic degradation of simulated dye wastewater

YANG Li, LI Runze, ZHANG Li, JIANG Xiaoxue, WANG Ruixue, TIAN Bincan
（Key Laboratory of Subsurface Hydrology and Ecology in Arid Areas of Ministry of Education, School of Water and
Environment, Chang'an University, Xi'an 710054, Shaanxi, China）

Abstract: Flower-like g-C 3N 4/Bi 2MoO 6 microspheres were prepared via hydrothermal-sacrificial template
method using yeast as biological template. The crystal structure, microstructure, light absorption and
specific surface area of the as-prepared sample were characterized by XRD, SEM, TEM, FTIR, UV-Vis
DRS, photocurrent response and nitrogen adsorption-desorption techniques. The photocatalytic degradation
performance and mechanism of g-C 3N 4/Bi 2MoO 6 microspheres for methylene blue (MB) simulated dye
wastewater under visible-light irradiation were investigated. The results showed that the
hydrothermal-sacrificial template method realized the successful recombination of g-C 3N 4 and Bi 2MoO 6 on
the surface of biological template. The as-obtained microspheres with a diameter of about 8 μm had good
2
dispersity and exhibited flower-like nano-clusters and a specific surface area of 11.6007 m /g. The
g-C 3N 4/Bi 2MoO 6 microspheres with g-C 3N 4 loading amount of 10% (based on the mass of Bi 2MoO 6, the
same below, denoted as 10CN/BM) showed high photocatalytic degradation activity for MB simulated dye
wastewater under visible light. When the addition amount of 10CN/BM was 1 g/L and the initial mass
concentration of simulated dye wastewater was 15 mg/L, the degradation rate of MB was over 96% under
visible light irradiation for 140 min. Mechanism analysis demonstrated that Z-type heterojunction formed
between g-C 3N 4 and Bi 2MoO 6 on the flower-like surface of bio-templated microspheres effectively reduced
the recombination rate of electronic-hole pairs and significantly enhanced the visible-light driven

收稿日期：2020-10-13; 定用日期：2020-12-01; DOI: 10.13550/j.jxhg.20200936
基金项目：陕西省自然科学基金（2018JM2030）；长安大学国家级大学生创新创业训练项目（S202010710134）
作者简介：杨 莉（1977—），女，副教授，E-mail: yyangli@chd.edu.cn。