摘要
在Cu基体上电沉积Ni-Mo合金后,通过溶胶-凝胶法制备了纳米TiO2修饰Ni-Mo合金电极。利用阳极极化曲线测试了TiO2/(Ni-Mo)薄膜电极在0.5mol/L Na2SO4溶液中的光电催化性能,考察了烧结温度、TiO2膜层厚度对电极性能的影响。结果表明:在400℃下烧结1h、拉膜9次制备的TiO2/(Ni-Mo)电极,光电流变化最大,光响应最明显。最后利用交流阻抗法测定了最佳条件下制备的电极的阻抗性能,光照后的TiO2/(Ni-Mo)薄膜电极的法拉第阻抗变小,说明该电极表现出良好的光电催化性能。
After electrodeposion of Ni-Mo alloy on Cu sheet,nano-crystalline TiO2 film modified Ni-Mo electrode was prepared by a sol-gel method.Anodic polarization curves were measured to characterize photoelectrocatalytic activity of the TiO2/（Ni-Mo） electrodes in solution 0.5 mol/L Na2SO4.Effects of the sintering temperature and the thickness of TiO2 film on the performance of the TiO2/（Ni-Mo） electrodes were researched.The results clearly demonstrate that the TiO2/（Ni-Mo） electrode annealed at 400℃ for 1 h has the best photoelectrocatalytic activity.Finally,the electrochemical impedance spectroscopy of the electrode that prepared under the best conditions were measured.The Faraday impedance of the TiO2/（Ni-Mo） electrode decreased significantly under the light.And this indicated that the electrode has the best photoelectrocatalytic performance.
出处
《廊坊师范学院学报（自然科学版）》
2010年第6期69-72,共4页
Journal of Langfang Normal University(Natural Science Edition)
