Page 46 - 201809
P. 46
第 35 卷第 9 期 精 细 化 工 Vol.35, No.9
201 8 年 9 月 FINE CHEMICALS Sept. 2018
功能材料
In O /CdS 复合物的制备及光催化性能
3
2
刘淑玲,严 薇,郭 洁,王月妍
(陕西科技大学 化学与化工学院,陕西 西安 710021)
摘要:以氧化铟(In 2 O 3 )纳米球作为基体,采用水热法制备了氧化铟/硫化镉(In 2 O 3 /CdS)复合光催化剂,并
利用 XRD、SEM 等对所制备复合光催化剂进行了表征。结果表明:复合光催化剂由立方相的 In 2 O 3 纳米球和六
方相 CdS 棒状结构组成,且 In 2 O 3 纳米球附着于 CdS 棒状结构表面上。光学性能测试和光降解实验发现:所得
复合光催化剂与纯 In 2 O 3 和纯 CdS 相比,不仅光响应范围增加,而且光催化亚甲基蓝(MB)的活性也得到显著
改善。当 In 2 O 3 /CdS 中 n(In 2 O 3 )∶n(CdS)=1∶4 时,光催化效率改善尤为明显,当复合催化剂的质量为 0.05 g
时,MB 转化率达到 96.2%;这可能是由于 CdS 接受 In 2 O 3 表面上的光生电子,减少了光生电子与空穴的复合机
会,因而提高了光催化降解能力。
关键词:氧化铟;水热法;In 2 O 3 /CdS 复合光催化剂;光催化;功能材料
中图分类号:O614 文献标识码:A 文章编号:1003-5214 (2018) 09-1472-06
Synthesis, Characterization and Photocatalytic
Properties of In 2O 3/CdS Composites
LIU Shu-ling, YAN Wei, GUO Jie, WANG Yue-yan
(College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021,
Shaanxi, China)
Abstract: Indium oxide (In 2O 3)/CdS composites were prepared via hydrothermal method. The as-prepared
composites were characterized by XRD, SEM and so on techniques. The results showed that the composites
consisted of cubic phase In 2O 3 nanospheres and hexagonal CdS nanorods, and In 2O 3 nanospheres were
attached to the surface of rod-like CdS in the In 2O 3/CdS composites. In 2O 3/CdS composite exhibited wider
response to light and enhanced photocatalytic activity towards the degradation of methylene blue (MB)
under visible light irradiation compared with pure In 2O 3 and CdS. Especially, In 2O 3/CdS composite with the
In 2O 3/CdS molar ratio of 1∶4 had the highest photocatalytic activity, and when the photocatalyst dosage
was 0.05 g, the conversion rate of MB reached 96.2%. The reason might be that CdS could capture the
photogenerated electrons on the surface of In 2O 3 and reduce the probability of recombination of
electron-hole pairs, improving the photo-degradation ability of In 2O 3/CdS.
Key words: indium oxide; hydrothermal method; In 2O 3/CdS composite photocatalyst; photocatalysis;
functional materials
Foundation items: Natural Science Foundation of Shaanxi Province (2015JM2059); National Natural
Science Foundation of China (21301113, 21471091)
随着社会发展,大气和水资源污染日趋严重, 成本低、无毒、光催化性能优良和无二次污染等,
寻找一种安全有效的解决办法已成为科研工作者不 因而成为解决大气和水中的污染物等环境和能源问
断努力的方向。利用半导体光催化法净化处理大气 题的理想途径。
和水中有机物污染有着诸多优点,如化学性能稳定、 氧化铟(In 2 O 3 )是一种重要的 N 型宽禁带半导
收稿日期:2017-08-13; 定用日期:2018-01-22; DOI: 10.13550/j.jxhg.20170659
基金项目:陕西省自然科学基金(2015JM2059);国家自然基金(21301113、21471091)
作者简介:刘淑玲(1974—),女,教授,E-mail:1291630941@qq.com。