光催化
聚苯胺
复合数
降级(电信)
甲基橙
纳米复合材料
煅烧
热液循环
材料科学
可见光谱
化学工程
矿化(土壤科学)
辐照
光降解
催化作用
聚合物
光化学
化学
纳米技术
复合材料
有机化学
计算机科学
光电子学
聚合
核物理学
工程类
物理
氮气
电信
作者
Yangming Lin,Danzhen Li,Junhua Hu,Guangcan Xiao,Jinxiu Wang,Wenjuan Li,Xianzhi Fu
摘要
The polyaniline (PANI)/TiO2 nanocomposites have been successfully synthesized via a hydrothermal method and followed by a low-temperature calcination treatment process. We find that such a PANI/TiO2 nanocomposite exhibits higher photocatalytic activity and stability than bare TiO2 and TiO2-xNx toward the liquid-phase degradation of methyl orange (MO) under both UV and visible light (420 nm < λ < 800 nm) irradiation. More noteworthy, the PANI/TiO2 photocatalyst still perform good activity toward MO and 4-chlorophenol (4-CP) under the longer wavelength of light (550 nm < λ < 800 nm). The total organic carbon (TOC) tests show that the mineralization rate of MO and 4-CP over PANI/TiO2 are apparently higher than bare TiO2 under the irradiation of both UV and visible light. The presence of synergic effect between PANI and TiO2 is believed to play an essential role in affecting the photoreactivity. At last, the roles of active species in the photocatalytic process are compared by using different types of active species scavengers. Meanwhile, the degradation mechanism of the photocatalysts is proposed. It is hoped that our work could provide valuable information on the design of polymer modified semiconductor with more excellent properties and set the foundation for the further industrial application.
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