Page 103 - 《精细化工》2022年第8期

第 39 卷第 8 期 精 细 化 工 Vol.39, No.8
2022 年 8 月 FINE CHEMICALS Aug. 2022

功能材料
等离子体改性 TiO /WO /Bi WO 纳米
2
3
6
2
复合材料及其可见光催化活性

*
冷 超，马春雨 ，王瑞腾，赵光辉，张庆瑜
（大连理工大学 物理学院 三束材料改性教育部重点实验室，辽宁 大连 116024）

摘要：以二水合钨酸钠和五水合硝酸铋为原料，通过优化水热反应温度制备了 WO 3 /Bi 2 WO 6 纳米片，将其与锐
钛矿型 TiO 2 纳米颗粒复合制备了可见光催化性能优良的 TiO 2 /WO 3 /Bi 2 WO 6 复合光催化剂，并采用一种高密度管
状等离子体放电装置对其进行表面改性。利用 XRD、SEM、TEM、HRTEM、XPS、UV-Vis DRS、PL 对样品进
行了表征和分析，考察了其在可见光下降解亚甲基蓝的光催化性能。结果表明，当水热温度为 120 ℃时，
WO 3 /Bi 2 WO 6 纳米片具有较好的光催化性能；TiO 2 /WO 3 /Bi 2 WO 6 复合催化剂中掺入 TiO 2 质量分数为 10.7%时，
所得三元复合材料的光催化性能远优于 WO 3 /Bi 2 WO 6 纳米片；经等离子体改性处理后，三元复合材料的吸收边
向可见光红移，放电电压的增加有助于提高复合材料的光催化活性，当放电电压为 1.1 kV 时，复合材料的降解
速率常数分别是未处理 TiO 2 /WO 3 /Bi 2 WO 6 样品和 WO 3 /Bi 2 WO 6 的 2.2 倍和 3.9 倍。
关键词：光催化；TiO 2 ；WO 3 /Bi 2 WO 6 纳米片；等离子体改性；功能材料
中图分类号：O643.36；O644.1 文献标识码：A 文章编号：1003-5214 (2022) 08-1603-09

Preparation and visible light catalytic activity of plasma-treated
TiO 2/WO 3/Bi 2WO 6 nanocomposites

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LENG Chao, MA Chunyu , WANG Ruiteng, ZHAO Guanghui, ZHANG Qingyu
（Key Laboratory of Materials Modification by Laser, Ion and Electron beams, School of Physics, Dalian University of
Technology, Dalian 116024, Liaoning, China）

Abstract: Nanocomposite TiO 2 /WO 3 /Bi 2 WO 6 photocatalysts were firstly prepared from anatase TiO 2 nanoparticle-
doped WO 3/Bi 2WO 6 nanosheets, which were synthesized via hydrothermal reaction of sodium tungstate
dihydrate and bismuth nitrate pentahydrate at optimized temperature, and then went through surface modification
by a high density tubular plasma discharge device. The samples were characterized and analyzed by XRD,
SEM, TEM, HRTEM, XPS, UV-Vis DRS and PL followed by investigation of their photocatalytic performance
on methylene blue (MB) degradation in water under visible light irradiation. The results showed the optimal
hydrothermal reaction temperature was 120 ℃, at which WO 3/Bi 2WO 6 nanosheets synthesized displayed
better photocatalytic performance. Moreover, the TiO 2/WO 3 /Bi 2 WO 6 nanocomposites doped with 10.7%
anatase TiO 2 nanoparticles exhibited significant photocatalytic activity enhancement in comparision to
WO 3/Bi 2WO 6 nanosheets. More importantly, the tubular plasma discharge surface modification made the
absorption edge of the TiO 2/WO 3/Bi 2WO 6 nanocomposites redshift at visible light, and the increase of
discharge input power helped improve the photocatalytic activity of the nanocomposite. At peak discharge
voltage of 1.1 kV, the degradation rate constant of the composite was 2.2 times and 3.9 times those of TiO 2/
WO 3 /Bi 2 WO 6 without surface modification (TiO 2 /WO 3 /Bi 2 WO 6 ) and WO 3 /Bi 2 WO 6 nanocomposites,
respectively.
Key words: photocatalyst; TiO 2; WO 3/Bi 2WO 6 nanosheets; plasma modification; functional materials

收稿日期：2022-01-23; 定用日期：2022-04-24; DOI: 10.13550/j.jxhg.20220084
基金项目：中央高校基本科研业务费专项资金（DUT19LAB14）
作者简介 ： 冷 超（ 1996 —），女，硕 士生 ， E-mail ： 1773436480@qq.com。 联系人 ： 马 春雨（ 1972— ），男，副 教授 ，
E-mail:chunyuma@dlut.edu.cn。