Mesoporous Technische Universiteit Delft（TUD-1）-supported chromium oxide-doped titania（Cr-TiO2） was developed as a promising photocatalyst for phenol photodegradation under visible light irradiation.Low-angle X-ra...Mesoporous Technische Universiteit Delft（TUD-1）-supported chromium oxide-doped titania（Cr-TiO2） was developed as a promising photocatalyst for phenol photodegradation under visible light irradiation.Low-angle X-ray diffraction and Fourier transform infrared spectroscopy results confirmed the amorphous and mesoporous silicate framework of TUD-1 in TUD-1-supported Cr-TiO2.The mesostructure of TUD-1 was further verified via N2 adsorption-desorption analysis,which showed a type-IV isotherm with a narrow average pore size distribution of 3.9 nm and high surface area of 490 m^2/g.Transmission electron microscopy analysis results indicated that TUD-1-supported Cr-TiO2 contained nanoparticles and porous channels.An increase in band gap energy was observed after loading Cr-TiO2 into TUD-1.Compared with that of unsupported Cr-TiO2,TUD-1-supported Cr-TiO2 showed higher photocatalytic activity for phenol degradation under visible light irradiation.The TUD-1 supported Cr-TiO2 photocatalyst with a Si/Ti molar ratio of 30 exhibited the highest photodegradation of phenol（82%） of the prepared samples.The photodegradation of phenol by the supported catalyst followed the Langmuir adsorption isotherm with first-order kinetics.展开更多
基金the Ministry of Higher Education,Malaysia and Universiti Teknologi Malaysia(UTM) for the financial supports through Research University Grants (Q.J130000.2426.03G35 and Q.J130000.2526.10H54)
文摘Mesoporous Technische Universiteit Delft（TUD-1）-supported chromium oxide-doped titania（Cr-TiO2） was developed as a promising photocatalyst for phenol photodegradation under visible light irradiation.Low-angle X-ray diffraction and Fourier transform infrared spectroscopy results confirmed the amorphous and mesoporous silicate framework of TUD-1 in TUD-1-supported Cr-TiO2.The mesostructure of TUD-1 was further verified via N2 adsorption-desorption analysis,which showed a type-IV isotherm with a narrow average pore size distribution of 3.9 nm and high surface area of 490 m^2/g.Transmission electron microscopy analysis results indicated that TUD-1-supported Cr-TiO2 contained nanoparticles and porous channels.An increase in band gap energy was observed after loading Cr-TiO2 into TUD-1.Compared with that of unsupported Cr-TiO2,TUD-1-supported Cr-TiO2 showed higher photocatalytic activity for phenol degradation under visible light irradiation.The TUD-1 supported Cr-TiO2 photocatalyst with a Si/Ti molar ratio of 30 exhibited the highest photodegradation of phenol（82%） of the prepared samples.The photodegradation of phenol by the supported catalyst followed the Langmuir adsorption isotherm with first-order kinetics.
