氮掺杂石墨烯负载的硫化镉空心球纳米复合材料的光催化性能

doi:10.1016/S1872-2067(12)60641-X

催化学报 ›› 2013, Vol. 34 ›› Issue (11): 2138-2145.DOI: 10.1016/S1872-2067(12)60641-X

氮掺杂石墨烯负载的硫化镉空心球纳米复合材料的光催化性能

米倩, 陈带全, 胡军成, 黄正喜, 李金林

中南民族大学催化材料科学国家民委-教育部重点实验室, 湖北武汉430074

收稿日期:2013-06-04 修回日期:2013-06-21 出版日期:2013-10-18 发布日期:2013-10-18
通讯作者: Juncheng Hu,Zhengxi Huang,Jinlin Li
基金资助:
国家重点基础研究发展计划(2011CB211704);国家自然科学基金(20803096,21073238);湖北省杰出青年基金(2010CDA082).

Nitrogen-doped graphene/CdS hollow spheres nanocomposite with enhanced photocatalytic performance

Qian Mi, Daiquan Chen, Juncheng Hu, Zhengxi Huang, Jinlin Li

Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, South-Central University for Nationalities, Wuhan 430074, Hubei, China

Received:2013-06-04 Revised:2013-06-21 Online:2013-10-18 Published:2013-10-18
Contact: Juncheng Hu,Zhengxi Huang,Jinlin Li
Supported by:
This work was supported by the National Basic Research Program of China (2011CB211704), the National Natural Science Foundation of China (20803096, 21073238), and the Natural Science Foundation of Hubei Province for Distinguished Young Investigator (2010CDA082).

摘要/Abstract

摘要：

通过无模板法一步合成了一种新型N掺杂石墨烯负载的CdS空心球复合材料. 采用X射线衍射、透射电镜、红外光谱、紫外-可见光谱、N₂吸附-脱附、荧光光谱和X射线光电子能谱等技术对该材料进行了表征, 并在可见光照射下测试了其在降解亚甲基蓝和水杨酸中的光催化性能. 结果表明, 相对于氧化石墨烯负载硫化镉空心球和单独的硫化镉空心球, 氮掺杂石墨烯负载的硫化镉空心球具有更高的光催化活性和稳定性. 这是由于氮掺杂的石墨烯能充当优异的电子受体和传输体, 从而抑制了载流子的复合. 另外发现, 羟基自由基是可见光下降解亚甲基蓝的主要活性物种.

关键词: 氮掺杂石墨烯, 硫化镉, 空心球, 光催化

Abstract:

A novel N-doped graphene/CdS hollow sphere nanocomposite photocatalyst was synthesized by a simple, template-free one-pot method. The samples were characterized by X-ray diffraction, transmission electron microscopy, Fourier transform infrared spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy, N₂ adsorption-desorption, photoluminescence spectroscopy, and X-ray photoelectron spectroscopy. Photocatalytic degradations of methylene blue and salicylic acid were carried out to evaluate the photocatalytic activity of the nanocomposites under visible light irradiation. The N-graphene/CdS nanocomposites exhibited excellent stability and high photocatalytic activity, exceeding those of graphene oxide/CdS hollow sphere nanocomposites and pure CdS hollow spheres. This excellent photocatalytic activity of the nanocomposite was due to N-graphene acting as an excellent electron acceptor and transporter, thus reducing charge carrier recombination. It was also found that ·OH acted as the main reactive species in the degradation of methylene blue under visible-light irradiation.

Key words: Nitrogen-doped graphene, Cadmium sulfide, Hollow spheres, Photocatalysis

米倩, 陈带全, 胡军成, 黄正喜, 李金林. 氮掺杂石墨烯负载的硫化镉空心球纳米复合材料的光催化性能[J]. 催化学报, 2013, 34(11): 2138-2145.

Qian Mi, Daiquan Chen, Juncheng Hu, Zhengxi Huang, Jinlin Li. Nitrogen-doped graphene/CdS hollow spheres nanocomposite with enhanced photocatalytic performance[J]. Chinese Journal of Catalysis, 2013, 34(11): 2138-2145.

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氮掺杂石墨烯负载的硫化镉空心球纳米复合材料的光催化性能

Nitrogen-doped graphene/CdS hollow spheres nanocomposite with enhanced photocatalytic performance

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