An efficient visible-light photocatalyst prepared from g-C3N4 and polyvinyl chloride

光催化 材料科学 光降解 可见光谱 罗丹明B 聚氯乙烯 光化学 漫反射红外傅里叶变换 拉曼光谱 X射线光电子能谱 光谱学 聚合物 核化学 化学工程 有机化学 化学 催化作用 复合材料 光学 工程类 物理 量子力学 光电子学
作者
Desong Wang,Haitao Sun,Qingzhi Luo,Xiaolian Yang,Rong Yin
出处
期刊:Applied Catalysis B-environmental [Elsevier BV]
卷期号:156-157: 323-330 被引量:116
标识
DOI:10.1016/j.apcatb.2014.03.034
摘要

A facile method has been developed to prepare an efficient visible-light photocatalyst using g-C3N4 and ordinary polyvinyl chloride (PVC) as main precursors. Firstly, g-C3N4 was dispersed into PVC solution with tetrahydrofuran as solvent. Secondly, the above suspension containing g-C3N4 was heated at 50 °C to obtain PVC/g-C3N4 composite via solvent volatilization. Finally, the product was heated at 150 °C for 2 h to obtain the photocatalyst covered by a small amount of conjugated polymer derived from PVC via dehydrochlorination reaction. The as-prepared photocatalyst was characterized by Scanning electron microscopy, UV–vis diffuse reflectance spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, Raman Spectroscopy, photoluminescence spectroscopy, etc. The photocatalytic activity of the as-prepared photocatalyst was evaluated by photodegradation of Rhodamine B solution under visible-light irradiation. The results show that the conjugated polymer can obviously improve the absorbance of g-C3N4 in the visible light range and the BET specific surface area, and hardly affect its crystalline structure. The visible-light photocatalytic activity of the as-prepared photocatalyt is much higher than that of pure g-C3N4, and increases first and then decreases as the content of conjugated polymer on the photocatalyst surface increases. The visible-light photocatalytic mechanism has been discussed.
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