Preparation and Photoelectrocatalytic Performance of Fe2O3/ZnO Composite Electrode Loading on Conductive Glass
Preparation and Photoelectrocatalytic Performance of Fe2O3/ZnO Composite Electrode Loading on Conductive Glass
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导电玻璃负载Fe2O3/ZnO复合电极的制备及其光电催化性能
DOI：
10.7503/cjcu20170388
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发表时间：
2018-04-10
影响因子：
1
通讯作者：
Wang Hao
中科院分区：
文献类型：
--
作者：
Han Zhiying;Li Youji;Wang Hao
以聚乙烯吡咯烷酮（PVP）和乙醇分别作为纤维骨架和溶剂，以醋酸锌[Zn(CH₃COO)₂·2H₂O]和乙酰丙酮铁（C₁₅H₂₁O₆Fe）为原料，通过溶胶 - 凝胶法结合静电纺丝技术制备了Fe₂O₃/ZnO前驱体纤维。通过煅烧得到了不同Fe/Zn摩尔比的Fe₂O₃/ZnO/FTO复合光电极。采用热重 - 差热分析（TG - DTA）、X射线衍射（XRD）、扫描电子显微镜（SEM）、X射线光电子能谱（XPS）等对其形貌和化学成分进行了表征。通过对亚甲基蓝（MB）溶液的降解来测试所得样品的光电催化性能。结果表明，ZnO和Fe₂O₃之间的p - n异质结有利于光生电子和空穴的分离，使得Fe₂O₃/ZnO/FTO与ZnO/FTO和Fe₂O₃/FTO相比具有较高的催化活性。不同Fe/Zn摩尔比的复合光电极表现出不同的光电催化活性。当n(Fe)/n(Zn)为1∶1时，Fe₂O₃/ZnO/FTO的催化活性最佳，140分钟后MB的降解率为97%。
Using polyvinylpyrrolidone(PVP ) and ethanol as fiber skeleton and solvent, respectively, Fe2O3/ZnO precursor fibers were prepared by sol-gel method combined with electrospinning technique with zinc acetate [Zn(CH3COO)(2)center dot 2H(2)O] and three iron acetylacetonate(C15H21O6Fe) as raw materials. Fe2O3/ZnO/FTO composite photoelectrodes with different Fe/Zn molar ratios were obtained by calcination. The morphologies and chemical components were characterized by thermogravimetry-differential thermal analysis (TG-DTA), X-ray diffraction(XRD), scanning electron microscopy(SEM), X-ray photoelectron spectroscopy (XPS), and so on. The photoelectrocatalytic performance of the obtained sample was tested by the degradation of methylene blue(MB) solution. The results indicate that the p-n heterojunctions between ZnO and Fe2O3 are beneficial for separation of photogenerated electrons and holes, resulting in Fe2O3/ZnO/FTO with high catalytic activity in comparsion with ZnO/FTO and Fe2O3/FTO. The composite photoelectrodes with different Fe/Zn molar ratios exhibit different photoelectrocatalytic activity. When n(Fe)/n(Zn) is 1: 1, the catalytic activity of Fe2O3/ZnO/FTO is the optimal, the degradation rate of MB is 97% after 140 min.