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首页> 外文期刊>Physical chemistry chemical physics: PCCP >Preparation,characterization and photoelectrocatalytic properties of nanocrystalline Fe_2O_3/TiO_2,ZnO/TiO_2,and Fe_2O_3/ZnO/TiO_2 composite film electrodes towards pentachlorophenol degradation
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Preparation,characterization and photoelectrocatalytic properties of nanocrystalline Fe_2O_3/TiO_2,ZnO/TiO_2,and Fe_2O_3/ZnO/TiO_2 composite film electrodes towards pentachlorophenol degradation

机译：纳米晶Fe_2O_3 / TiO_2，ZnO / TiO_2和Fe_2O_3 / ZnO / TiO_2复合膜电极的制备，表征及光电催化性能对五氯苯酚的降解

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摘要

Nanocrystalline TiO_2 composite thin ZnO/TiO_2,Fe_2O_3/ZnO/TiO_2 and Fe_2O3/TiO_2 films were developed on titanium substrates by applying dip-coating technique formed by the sol-gel method.Scanning electron microscopy(SEM)evaluated the surface characteristics of the films.Results on their structure and crystallinity were obtained by means of X-ray diffraction.The samples were also characterized by X-ray energy dispersive spectrometer(EDS)and ultraviolet-visible diffuse reflectance spectroscopy.The photocatalytic activity of these films towards photodegradation of pentachlorophenol pollutant was examined and their efficiency was compared to those of the different TiO_2films.It has been shown that the film photocatalysts can efficiently decompose the pollutant.The photoelectrocatalytic degradation of PCP showed important variation that decreases in the order:ZnO/TiO_2>TiO_2>Fe_2O_3/ZnO/TiO_2>Fe_2O_3/TiO_2.The results showed that Zn~(2+) doped could improve PEC activity of titania film electrode while Fe + doped can not improve that of titania film electrode.
机译：运用溶胶-凝胶法形成的浸涂技术在钛基体上制备了纳米TiO_2复合薄膜ZnO / TiO_2，Fe_2O_3 / ZnO / TiO_2和Fe_2O3 / TiO_2薄膜。扫描电镜观察了薄膜的表面特性。通过X射线衍射获得其结构和结晶度的结果，并通过X射线能量色散光谱仪（EDS）和紫外可见漫反射光谱对样品进行表征，这些膜对五氯酚的光催化活性。结果表明，薄膜光催化剂可以有效分解污染物。PCP的光电催化降解表现出重要的变化，其变化顺序为：ZnO / TiO_2> TiO_2> Fe_2O_3 / ZnO / TiO_2> Fe_2O_3 / TiO_2。结果表明，掺杂Zn〜（2+）可以提高二氧化钛薄膜的PEC活性。 Fe +掺杂的阳极不能改善二氧化钛膜电极的性能。

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