TY - JOUR
T1 - Substantial change in phenomenon of "self-corrosion" on Ag3PO4/TiO2 compound photocatalyst
AU - Ma, Xinlong
AU - Li, Huihui
AU - Wang, Yuhua
AU - Li, Hao
AU - Liu, Bin
AU - Yin, Shu
AU - Sato, Tsugio
N1 - Funding Information:
This work was supported by the National Nature Science Young Foundation of China (No. 10904057 ), the International Sci. & Tech. Cooperation Foundation of Gansu Provincial, China (Grant No. 1304WCGA177 ), the Fundamental Research Funds for Central Universities (No. lzujbky-2013-28 ), Technology Foundation for Selected Overseas Chinese Scholar (Department of Human Resources and Social Security of Gansu Province), the Basic Scientific Research Business Expenses of the Central University , and Open Project of Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University (No. LZUMMM2014008 ).
PY - 2014/10
Y1 - 2014/10
N2 - The phenomenon of color-change was first observed in the simple physical mixed Ag3PO4/TiO2 compounds in dark, called "self-corrosion". The difference between self-corrosion and photo-corrosion was clarified. It is found that the chemical environment of Ag is altered in Ag3PO4/TiO2 compounds compared with that in bare Ag3PO4. Furthermore, the change in self-corrosion and its impact on photocatalytic activity were investigated. It is found that under ultraviolet (UV) light irradiation the advantage over bare Ag3PO4 is still maintained in the self-corrosion Ag3PO4/TiO2 compounds due to the similar adsorption capacity. Meanwhile, the photocatalytic activity of self-corrosion Ag3PO4/TiO2 under visible light irradiation is lower than that of fresh Ag3PO4/TiO2 due to the decrease of Ag3PO4. In addition, the identification of oxidative degradation intermediates in the solution was conducted by mass spectra (MS) for the explanation of the degradation mechanism.
AB - The phenomenon of color-change was first observed in the simple physical mixed Ag3PO4/TiO2 compounds in dark, called "self-corrosion". The difference between self-corrosion and photo-corrosion was clarified. It is found that the chemical environment of Ag is altered in Ag3PO4/TiO2 compounds compared with that in bare Ag3PO4. Furthermore, the change in self-corrosion and its impact on photocatalytic activity were investigated. It is found that under ultraviolet (UV) light irradiation the advantage over bare Ag3PO4 is still maintained in the self-corrosion Ag3PO4/TiO2 compounds due to the similar adsorption capacity. Meanwhile, the photocatalytic activity of self-corrosion Ag3PO4/TiO2 under visible light irradiation is lower than that of fresh Ag3PO4/TiO2 due to the decrease of Ag3PO4. In addition, the identification of oxidative degradation intermediates in the solution was conducted by mass spectra (MS) for the explanation of the degradation mechanism.
KW - Photocatalysis
KW - Silver orthophosphate
KW - Stability
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U2 - 10.1016/j.apcatb.2014.04.031
DO - 10.1016/j.apcatb.2014.04.031
M3 - Article
AN - SCOPUS:84899918703
SN - 0926-3373
VL - 158-159
SP - 314
EP - 320
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
ER -