Enhanced photochemical catalysis of TiO2 inverse opals by modification with ZnO or Fe2O3 using ALD and the hydrothermal method

Enhanced photochemical catalysis of TiO2 inverse opals by modification with ZnO or Fe2O3 using ALD and the hydrothermal method
复制标题

使用 ALD 和水热法用 ZnO 或 Fe2O3 改性增强 TiO2 反蛋白石的光化学催化

DOI:
10.1088/2053-1591/aaabe9
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发表时间:
2018-02
影响因子:
2.3
通讯作者:
Wang Yongsheng
Wang Yongsheng
中科院分区:
材料科学4区
文献类型:
--
作者:
Liu Jiatong;Sun Cuifeng;Fu Ming;Long Jie;He Dawei;Wang Yongsheng

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开发具有光子调节能力的多孔性材料以提高光电催化性能一直是太阳能利用的重要目标之一。本研究探讨了提高二氧化钛反蛋白石光催化活性的方法。以胶体晶体为模板,采用原子层沉积(ALD)法制备了二氧化钛反蛋白石。此外,还利用不同的胶体球体通过重复垂直沉积的方法制备了二氧化钛反蛋白石异质结构。采用水热法和ALD法在二氧化钛多孔结构的内表面制备了氧化锌和氧化铁修饰的二氧化钛反蛋白石。尽管氧化物改性对光子反射带影响不大,但Fe2O_3的存在增强了其可见光吸收。二氧化钛反蛋白石表面的共形修饰氧化物还可以形成能垒,避免电子和空穴的复合。制备二氧化钛光子晶体异质结构,并用氧化锌或氧化铁进行修饰,可以提高二氧化钛反蛋白石的光催化活性。
The development of porous materials exhibiting photon regulation abilities for improved photoelectrochemical catalysis performance is always one of the important goals of solar energy harvesting. In this study, methods to improve the photocatalytic activity of TiO2 inverse opals were discussed. TiO2 inverse opals were prepared by atomic layer deposition (ALD) using colloidal crystal templates. In addition, TiO2 inverse opal heterostructures were fabricated using colloidal heterocrystals by repeated vertical deposition using different colloidal spheres. The hydrothermal method and ALD were used to prepare ZnO- or Fe2O3-modified TiO2 inverse opals on the internal surfaces of the TiO2 porous structures. Although the photonic reflection band was not significantly varied by oxide modification, the presence of Fe2O3 in the TiO2 inverse opals enhanced their visible absorption. The conformally modified oxides on the TiO2 inverse opals could also form energy barriers and avoid the recombination of electrons and holes. The fabrication of the TiO2 photonic crystal heterostructures and modification with ZnO or Fe2O3 can enhance the photocatalytic activity of TiO2 inverse opals.
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