【摘 要】
：
In order to investigate the difference of phtotocatalytic propenties of TiO_2 samples prepared in different pH conditions, TiO_2 nanoparticles were prepared in
【机 构】
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State Key Laboratory of Urban Water Resource and Environment,School,School of Chemistry and Material
论文部分内容阅读
In order to investigate the difference of phtotocatalytic propenties of TiO_2 samples prepared in different pH conditions, TiO_2 nanoparticles were prepared in acidic medium and basic medium by a hydrothermal process,respectively.The samples were characterized using XRD,TEM, BET,XPS,surface photovoltage spectroscopy(SPS)and field-induced surface photovoltage spectroscopy(FISPS).Effects of temperature and pH in the hydrothermal process on particle sizes,specific surface areas,and photocatalytic properties of the TiO_2 nanocrystalline were investigated.The experimental results indicate that the photocatalysis activity of TiO_2 nanoparticles prepared in basic medium (B-TiO_2) is superior to that in acidic medium (A-TiO_2),which is ascribed to the difference of surface state between A-TiO_2 and B-TiO_2.
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