Page 130 - 201810

第 35 卷第 10 期 精 细 化 工 Vol.35, No.10
2018 年 10 月 FINE CHEMICALS Oct. 2018

水处理技术与环境保护
Bi O CO 微/纳米片的合成及其光催化降解 RhB
3
2
2
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巩嘉杨，徐海明 ，李东亚，孙靖宇，夏东升
（武汉纺织大学 环境工程学院，湖北 武汉 430200）

摘要：以尿素为碳源，通过水热法成功合成了片状光催化剂 Bi 2 O 2 CO 3 。采用 X 射线衍射（XRD）、场发射扫描
电子显微镜（FESEM）、透射电子显微镜（TEM）、选区电子衍射（SAED）和紫外-可见漫反射光谱（DRS）
等对 Bi 2 O 2 CO 3 进行了表征。考察了不同尿素加入量对 Bi 2 O 2 CO 3 形貌、结构和光催化降解罗丹明 B 性能的影响。
结果表明：所合成 Bi 2 O 2 CO 3 尺寸均小于 2 μm；尿素加入量为 0.1 g 所合成 Bi 2 O 2 CO 3 的吸收边为 394 nm，带隙
能量为 3.14 eV。该样品在可见光下光照 200 min 可将 RhB 降解 50%，紫外光下光照 120 min， RhB 的降解率为
80%，均高于商品 TiO 2 对 RhB 的降解率。自由基抑制实验表明，超氧自由基和空穴是 Bi 2 O 2 CO 3 在光催化降解
过程中主要的活性物种。循环降解实验发现，Bi 2 O 2 CO 3 具有较高的光催化稳定性和重复利用性。
关键词：Bi 2 O 2 CO 3 ；尿素；光催化技术；水处理技术与环境保护
中图分类号：O643.3 文献标识码：A 文章编号：1003-5214 (2018) 10-1738-07

Synthesis of Bi 2O 2CO 3 Micro-nanosheets and Its
Photocatalytic Degradation of RhB

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GONG Jia-yang, XU Hai-ming , LI Dong-ya, SUN Jing-yu, XIA Dong-sheng
（School of Environmental Engineering, Wuhan Textile University, Wuhan 430200, Hubei, China）

Abstract: Bi 2O 2CO 3 nanosheets were successfully synthesized by hydrothermal method using urea as
carbon source. X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM),
transmission electron microscopy (TEM), selected-area electron diffraction (SAED), UV-visible diffuse
reflectance spectroscopy (DRS) and so on techniques were used to characterize the Bi 2O 2CO 3 samples. The
effects of different addition amount of urea on the morphology and structure of obtained Bi 2O 2CO 3 were
investigated. Subsequently, the photocatalytic degradation of RhB over Bi 2O 2CO 3 samples was studied. The
results showed the Bi 2O 2CO 3 samples had sizes of less than 2 μm, wherein the sample prepared using 0.1 g
urea as carbon source exhibited an absorption edge of 394 nm and a band gap of 3.14 eV. Furthermore, this
sample had excellent photocatalytic activity. The degradation rate of RhB with Bi 2O 2CO 3 in the
photocatalytic process for 200 min was 50% under visible light irradiation, while the degradation rate of
RhB reached 80% under UV light irradiation for 120 min, which were higher than those of TiO 2. Free
+
–
radical inhibition experiments revealed that superoxide radical (·O 2 ) and holes (h ) were the main active
species in the photocatalytic degradation of RhB over Bi 2O 2CO 3. Cyclic degradation experiments indicated
that the Bi 2O 2CO 3 had high photocatalysis stability and reusability.
Key words: Bi 2O 2CO 3; urea; photocatalytic technology; water treatment technology and environmental
protection
Foundation item: National Science and Technology Support Program (2014BAC13B02)

[1]
[3]
近年来，有机物引起的环境污染问题日益严重 ， 定等优点，成为光催化研究领域最主要的催化剂 。
绿色环保半导体光催化剂技术已逐渐成为治理有机 然而，TiO 2 仅能利用太阳光中的紫外线部分（太阳
[2]
物污染的有效手段 。TiO 2 由于具有廉价、无毒、稳 光能量利用率小于 5%），这大大限制了其在可见光

收稿日期：2017-07-24; 定用日期：2018-01-30; DOI: 10.13550/j.jxhg.20170597
基金项目：国家科技支撑计划项目（2014BAC13B02）
作者简介：巩嘉杨（1996—），男，本科生。联系人：徐海明（1983—），男，讲师，电话：027-59367685，E-mail：xulianhe@163.com；
夏东升（1971—），男，教授，电话：027-59367685，E-mail：dongsheng_xia@wtu.edu.cn。