Titanium dioxide （TiO2） thin films were grown onto Indium tin oxide （ITO） glass under atmospheric pressure by chemical va- por deposition （AP-MOCVD） using titanium tetraisopropoxide astitanium precursor. The as-...Titanium dioxide （TiO2） thin films were grown onto Indium tin oxide （ITO） glass under atmospheric pressure by chemical va- por deposition （AP-MOCVD） using titanium tetraisopropoxide astitanium precursor. The as-prepared TiOe/ITO films were characterized using X-ray diffraction （XRD）, scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, X-ray photoelectron spectroscopy （XPS） and photoelectrochemical measurements. Their photocatalytic （PC） and photoelec- trocatalytic （PEC） activities were evaluated based on the results of methyl orange dye （MO） degradation experiments in aque- ous solution. The difference between the front side （EE, electrolyte/electrode interface） and the back side （SE, sub- strate/electrode interface） illumination was evaluated in both photocurrent and MO degradation experiments. The effect of the film thickness on degradation rate by PEC under the two illumination directions was also studied. Stability of TiO2/ITO film electrode was investigated in repetitive degradation experiments. Overall, the TiO2/ITO film with thickness ranging from 321 to1440 nm deposited by MOCVD method is an effective photoelectrode for MO degradation under SE illumination in PEC reaction system.展开更多
基金financial support to this study by the National Natural Science Foundation of China (21076188, 20836008, 20976158, 20990221and 21076189)the Key Innovation Team for Science and Technology of Zhejiang Province of China (2009R50047)
文摘Titanium dioxide （TiO2） thin films were grown onto Indium tin oxide （ITO） glass under atmospheric pressure by chemical va- por deposition （AP-MOCVD） using titanium tetraisopropoxide astitanium precursor. The as-prepared TiOe/ITO films were characterized using X-ray diffraction （XRD）, scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, X-ray photoelectron spectroscopy （XPS） and photoelectrochemical measurements. Their photocatalytic （PC） and photoelec- trocatalytic （PEC） activities were evaluated based on the results of methyl orange dye （MO） degradation experiments in aque- ous solution. The difference between the front side （EE, electrolyte/electrode interface） and the back side （SE, sub- strate/electrode interface） illumination was evaluated in both photocurrent and MO degradation experiments. The effect of the film thickness on degradation rate by PEC under the two illumination directions was also studied. Stability of TiO2/ITO film electrode was investigated in repetitive degradation experiments. Overall, the TiO2/ITO film with thickness ranging from 321 to1440 nm deposited by MOCVD method is an effective photoelectrode for MO degradation under SE illumination in PEC reaction system.
