In-situ synthesis of CdS/g-C3N4 hybrid nanocomposites with enhanced visible photocatalytic activity
In-situ synthesis of CdS/g-C3N4 hybrid nanocomposites with enhanced visible photocatalytic activity
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原位合成具有增强可见光催化活性的 CdS/g-C3N4 杂化纳米复合材料
DOI：
10.1007/s10853-015-8865-8
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发表时间：
2015-04-01
影响因子：
4.5
通讯作者：
Qi, Pang
中科院分区：
文献类型：
--
作者：
Fang, Zhang L.;Rong, Huang F.;Qi, Pang
采用一种新颖且简单的原位合成策略，从含镉碳氮化物中制备了具有可见光驱动光催化活性的 CdS/g-C3N4 杂化纳米复合材料催化剂。 X 射线衍射测量、高分辨率透射电子显微镜图像和傅里叶变换红外光谱显示，复合材料中 g-C3N4 与 CdS 纳米粒子和纳米棒之间存在紧密界面的异质结。紫外可见漫反射光谱表现出红移，进一步呈现出聚合物 g-C3N4 骨架中的 CdS，从而可以有效利用太阳光谱来产生光生电子和空穴。纳米复合材料的光致发光光谱表明电荷从 g-C3N4 转移到 CdS。杂化纳米复合材料的光电流强度是纯g-C3N4样品的2.3倍，光催化甲基橙光降解活性是其2.5倍，析氢反应是其2.8倍。 CdS/g-C3N4 杂化纳米复合材料的光催化活性和光电流得到了增强。
A novel and simple in situ synthetic strategy was used to fabricate CdS/g-C3N4 hybrid nanocomposite catalysts with visible-light-driven photocatalytic activity from cadmium-containing carbon nitride compounds. X-ray diffraction measurements, high-resolution transmission electron microscopy images, and Fourier transform infrared spectra showed heterojunctions with a close interface between the g-C3N4 and the CdS nanoparticles and nanorods in the composite. Ultraviolet visible diffuse reflectance spectra exhibited a red shift that further presented the CdS in the polymer g-C3N4 skeleton, which allowed the efficient utilization of the solar spectrum for creating photogenerated electrons and holes. The photoluminescence spectra of the nanocomposites suggested charge transfer from g-C3N4 to CdS. The photocurrent intensity of hybrid nanocomposites was 2.3 times than that of pure g-C3N4 sample, and photocatalytic activity for the photodegradation of methyl orange was 2.5 times, and hydrogen evolution reaction was 2.8 times. Enhanced photocatalytic activity and photocurrent for the CdS/g-C3N4 hybrid nanocomposites were achieved.