高等学校化学学报 ›› 2015, Vol. 36 ›› Issue (5): 989-995.doi: 10.7503/cjcu20140733

• 物理化学 • 上一篇    下一篇

有序介孔三氧化二铟/还原氧化石墨烯纳米复合材料的制备及可见光催化性能

丁敏娟1,2, 黄徽2, 杨平2()   

  1. 1. 南通农业职业技术学院环境与资源系, 南通 226007
    2. 苏州大学材料与化学化工学部, 苏州 215123
  • 收稿日期:2014-08-08 出版日期:2015-05-10 发布日期:2015-04-16
  • 作者简介:联系人简介: 杨 平, 男, 博士, 教授, 博士生导师, 主要从事催化新材料、 光催化和太阳能转化研究. E-mail: pyang@suda.edu.cn
  • 基金资助:
    国家自然科学基金(批准号: 21373143)、 江苏省自然科学基金(批准号: BK2010209)和江苏省青蓝工程(批准号: 苏教师[2012]16号)资助

Preparation and Visible Light Photocatalytic Performance of Ordered Mesoporous Indium Dioxide/Reduced Graphene Oxide Nanocomposite

DING Minjuan1,2, HUANG Hui2, YANG Ping2,*()   

  1. 1. Department of Environment and Resources, Nantong Agricultural College, Nantong 226007, China
    2. College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
  • Received:2014-08-08 Online:2015-05-10 Published:2015-04-16
  • Contact: YANG Ping E-mail:pyang@suda.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.21373143), the Natural Science Foundation of Jiangsu Province, China(No.BK2010209) and the Qing Lan Project of Jiangsu Province, China

摘要:

以有序介孔三氧化二铟(m-In2O3)和还原氧化石墨烯(RGO)为原料, 采用紫外光照射法合成了介孔三氧化二铟/还原氧化石墨烯(m-In2O3-RGO)复合光催化剂. 利用N2吸附-脱附、 X射线衍射(XRD)、 透射电子显微镜(TEM)、 漫反射吸收光谱(DRS)和光电流测试等手段对样品进行表征. 在可见光照射下, 以对氯苯酚(4-CP)为目标污染物, 考察了m-In2O3-RGO光催化剂的催化性能. 结果表明, m-In2O3-RGO光催化剂具有完整的晶型和规则的孔道结构, 有利于光生电子和空穴的分离. 同时, 作为固态电子受体与传输体的RGO促进了光生电子-空穴对的传输和分离, 有效提高了可见光催化性能. 掺杂2%(质量分数)RGO的复合光催化剂性能最佳, 4 h可将4-CP降解96%以上, 催化剂经多次循环使用后, 其光催化活性基本保持不变.

关键词: 介孔三氧化二铟, 还原氧化石墨烯, 纳米复合物, 可见光催化

Abstract:

Ordered mesoporous indium dioxide(m-In2O3)/reduced graphene oxide(RGO) nanocomposites(m-In2O3-RGO) were prepared by a facile UV-assisted photoreduction method. The as-prepared samples were characterized by N2 adsorption-desorption, X-ray diffraction, transmission electron microscopy, UV-Vis diffuse reflectance spectroscopy and photocurrent techniques. Photocatalytic properties of m-In2O3-RGO nanocompo-site were studied under different conditions by using 4-chlorophenol(4-CP) as target pollutant under visible light irradiation. The results indicate that m-In2O3-RGO nanocomposite equip with high crystallinity and continuous pore channels, which provide a short distance for photogenerated charge carriers transfer. Simulta-neously, RGO acts herein as a solid-state electron mediator, promoting the charge transportation and separation, as well as suppressing the electron-hole recombination in the composite. Under visible light irradiation, the photodegradation rate of 4-CP from the optimized photocatalyst containing ca. 2%(mass fraction) RGO reached to 96%. Meanwhile, the photocatalyst could be recycled several times without losing its photocatalytic performance.

Key words: Mesoporous indium dioxide, Reduced graphene oxide, Nanocomposite, Visible light photocatalysis

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