Synthesis of visible light-driven Eu, N co-doped TiO2 and the mechanism of the degradation of salicylic acid
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- 作者：Yunfei Ma (1)
Jinlong Zhang (1) jlzhang@ecust.edu.cn
Baozhu Tian (1)
Feng Chen (1)
Shenyuan Bao (1)
Masakazu Anpo (2) - 关键词：Nitrogen – ; Europium – ; Co ; doping – ; TiO2 – ; Salicylic acid – ; Photocatalysis reaction
- 刊名：Research on Chemical Intermediates
- 出版年：2012
- 出版时间：October 2012
- 年：2012
- 卷：38
- 期：8
- 页码：1947-1960
- 全文大小：554.1 KB
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- ISSN：1568-5675
文摘
Europium and nitrogen co-doped TiO2 was successfully synthesized by the precipitation–peptization method. The structure and properties of the catalysts were characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and UV–vis diffuse reflectance spectra. The photocatalytic efficiency was evaluated by monitoring the photocatalytic degradation of salicylic acid under visible light irradiation. It was verified that TiO2 co-doped with nitrogen and 1% europium showed the highest photocatalytic activity. The adsorption isotherms were obtained by measuring the salicylic acid concentration before and after the dark adsorption at different original solution concentrations. The results illustrated that the doping of Eu was beneficial to the adsorption of salicylic acid. The probable degradation mechanism of salicylic acid was examined by the addition of NaF, Na2S2O3, and K2S2O8 as the probe molecules. It was verified that salicylic acid was first adsorbed on the surface of the catalysts, followed by the degradation by the photogenerated holes (h vb+).