原位合成具有高可见光催化活性的C3N4/CdS纳米复合材料

doi:10.1016/S1872-2067(14)60237-0

催化学报 ›› 2015, Vol. 36 ›› Issue (3): 372-379.DOI: 10.1016/S1872-2067(14)60237-0

原位合成具有高可见光催化活性的C₃N₄/CdS纳米复合材料

崔言娟

江苏科技大学环境与化学工程学院, 江苏镇江212003

收稿日期:2014-08-31 修回日期:2014-10-08 出版日期:2015-02-14 发布日期:2015-02-14
通讯作者: 崔言娟
基金资助:
江苏省自然科学基金(BK20140507).

In-situ synthesis of C₃N₄/CdS composites with enhanced photocatalytic properties

Yanjuan Cui

School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, China

Received:2014-08-31 Revised:2014-10-08 Online:2015-02-14 Published:2015-02-14
Supported by:
This work was supported by the Natural Science Foundation of Jiangsu Province (BK20140507).

摘要/Abstract

摘要：

以硫氰酸铵和氯化镉为原料, 采用无模板混合高温煅烧法一步合成氮化碳/硫化镉纳米晶(C₃N₄/CdS)的复合半导体材料.采用X射线衍射、傅立叶变换红外光谱和透射电镜等技术对其结构和形貌进行了表征.以有机污染物罗丹明B (RhB)为模拟污染物对复合催化剂的可见光催化活性进行测试.结果表明, C₃N₄/CdS复合材料中CdS以六方相纳米晶的形式均匀分散; CdS的复合基本不改变C₃N₄主体结构及聚合度; 与纯C₃N₄相比, 复合材料在可见区的光吸收能力有所增强.合适的能带匹配有利于光生载流子的迁移, 抑制了其复合速率.在可见光照射下, 复合半导体能够更加快速的降解有机污染物, 且保持很好的稳定性.

关键词: 氮化碳, 硫化镉, 光催化, 污染物降解

Abstract:

A hybrid semiconductor composed of a carbon nitride/cadmium sulfide nanocomposite (C₃N₄/CdS) was synthesized by a template-free one-step calcination route at high temperature using ammonium thiocyanate and cadmium chloride as starting materials. The crystal structure, composition and morphology of the hybrid samples were studied by X-ray diffraction, Fourier transform infrared spectroscopy and transmission electron microscopy. The photocatalytic degradation of Rhodamine B as a model compound was carried out to evaluate the photocatalytic activity of the nanocomposites under visible light irradiation. Hexagonal CdS nanocrystals were uniformly distributed in the bulk C₃N₄. After coupling with CdS the basic C₃N₄ structure was mostly unchanged. The visible light absorption properties of the hybrid materials were enhanced. The as-prepared C₃N₄/CdS hybrid photocatalyst exhibited superior degradation performance under visible light irradiation compared with pure C₃N₄. The well-matched band energy improved the transfer efficiency of the photoinduced carriers and this was responsible for the enhanced photocatalytic activity and stability of the hybrid photocatalysts.

Key words: Carbon nitride, Cadmium sulfide, Photocatalysis, Degradation of pollutants

崔言娟 . 原位合成具有高可见光催化活性的C₃N₄/CdS纳米复合材料[J]. 催化学报, 2015, 36(3): 372-379.

Yanjuan Cui . In-situ synthesis of C₃N₄/CdS composites with enhanced photocatalytic properties[J]. Chinese Journal of Catalysis, 2015, 36(3): 372-379.

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https://www.cjcatal.com/CN/Y2015/V36/I3/372

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原位合成具有高可见光催化活性的C₃N₄/CdS纳米复合材料

In-situ synthesis of C₃N₄/CdS composites with enhanced photocatalytic properties

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