C-PANI/Ag/Ag_3PO_4复合材料增强可见光光催化性能

Preparation of C-PANI/Ag/Ag_3PO_4 with Enhanced Visible Light Photocatalytic Activity

研究首先制备得到聚苯胺(PANI)纳米线材料,并首次通过高温煅烧处理PANI制备碳纳米线材料(C-PANI),进一步通过化学沉淀法成功合成了C-PANI/Ag/Ag_3PO_4复合材料。通过XRD、SEM和SEM元素扫描技术表征复合材料的晶体结构、微观形貌和元素分布情况;用紫外可见分光光度计测试系列材料的光学吸收性能;最后测试系列光催化材料的光催化降解Rh B的性能。测试结果表明,Ag/Ag_3PO_4结构成功负载到C-PANI的表面并形成有效接触,明显增强了Ag_3PO_4的光催化性能,其中,25%(wt)C-PANI/Ag/Ag_3PO_4样品在10 min内可实现RhB的完全脱色,为纯Ag_3PO_4的光催化性能的3.5倍。经过分析,C-PANI可为Ag_3PO_4的反应提供更多的活性位点,增强其光生电子和空穴的分离效率,从而增强其光催化性能。

A carbon nanowire material（C-PANI） was prepared using polyaniline（PANI） via high-temperature calcination, and then a series of C-PANI/Ag/Ag3PO4 compound materials were synthesized by a deposition method. Crystal structure, microstructure and element distribution of these compound materials were characterized by X-ray diffraction（XRD）, scanning electron microscopy（SEM） and SEM elemental mapping technologies. The optical absorption properties of the prepared samples were measured with UV spectrophotometer（UV-VIS）, and the visible light degradation performance of these samples was investigated.The results show that the visible light photocatalytic performance of the C-PANI/Ag/Ag3PO4 compound materials is significantly enhanced compared with pure Ag3PO4, which is due to successful loading of Ag/Ag3PO4 onto C-PANI surface and formation of effective contact with C-PANI. 25%（wt） C-PANI/Ag/Ag3PO4 can completely degrade Rh B in 10 minutes with visible light irradiation, and the photocatalytic activity is 3.5 times of that of pure Ag3PO4. Moreover, C-PANI can provide more active sites for the reaction of Ag3PO4. The improved photocatalytic activity is attributed to the effective separation of the photogenerated electrons and holes, in which C-PANI serves as the receptor of photogenerated electrons.