Effects of Ag-doped NiTiO₃ on photoreduction of methylene blue under UV and visible light irradiation

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• 作者：Yi-Jing Lin ; Yen-Hwei Chang ; Guo-Ju Chen ; Yee-Shin Chang ; Yee-Cheng Chang
• 关键词：Ag ; NiTiO₃ ; Photoreduction ; Methylene blue
• 刊名：Journal of Alloys and Compounds
• 出版年：2009
• 出版时间：24 June 2009
• 年：2009
• 卷：479
• 期：1-2
• 页码：785-790
• 全文大小：1124 K

文摘

Pure and Ag-doped NiTiO₃ powders were prepared by the modified Pechini Method. The effects of Ag doping on NiTiO₃ were investigated by means of XRD, SEM, TEM, BET and DRS. The photocatalytic properties were analyzed by spectrophotometrically estimating molar concentration variation of methylene blue which is photo-reduced under UV and visible light irradiation in an MB aqueous solution according to the Beer-Lambert Law. It is found that silver migrates from the volume of NiTiO₃ to deposit on the surface and also promotes the crystallinity of NiTiO₃ structure. The precipitated Ag nanoparticles acts as an electron-hole separation center so that Ag-NiTiO₃ has better ability for the photoreduction of MB with the increasing silver concentration.