Nitrogen-doped Titanium Dioxide(N-doped TiO2)for Visible Light Photocatalysis
Mesoporous nitrogen-doped titania(TON)anatase phase photocatalysts were successfully prepared using sol-gel and solvent evaporation induced self-assembly(SEISA)methods.Dodecylamine(DDA)and diethylenetriamine(DETA)were used as surfactants for endowing mesoporosity,complexing agents,base catalysts for polymerizing titania source(titanium isopropoxide),and sources for nitrogen doping.It was found that the titania source and the amount of DDA and DETA influenced strongly the textural[specific surface area(SBET),pore volume,and pore size],optical[UV-Vis absorbance and band gap energy(Eg)],morpholoical properties,and photocatalytic activity of TON photocatalysts.X-ray photoelectron spectroscopy study revealed the presence of substitutional and interstitial oxidized nitrogen dopings.All TON photocatalysts showed superiority in degrading methylene blue(MB)dye than the commerciallyavailable Fluka titania anatase phase catalyst under visilbe irradiation between400nm and800nm.TON photocatalyst with the highest SBET and the smallest Eg exhibited the fastest rate for the photodegradation of MB.
Visible Light Photocatalysis;diethylenetriamine;Dodecylamine;specific surface area
北京化工大学
硕士
Chemistry
李殿卿
2017
中文
TQ426
48
2017-08-15（万方平台首次上网日期，不代表论文的发表时间）