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BaTiO3 Nanosheets and Caps Grown on TiO2 Nanorod Arrays as Thin-Film Catalysts for Piezocatalytic Applications
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-03-12 , DOI: 10.1021/acsami.0c00962 Enzhu Lin 1 , Ni Qin 1 , Jiang Wu 1 , Baowei Yuan 1 , Zihan Kang 1 , Dinghua Bao 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-03-12 , DOI: 10.1021/acsami.0c00962 Enzhu Lin 1 , Ni Qin 1 , Jiang Wu 1 , Baowei Yuan 1 , Zihan Kang 1 , Dinghua Bao 1
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Powder-form piezocatalysts suffer from poor recyclability and pose a potential threat of creating serious secondary pollution, which restrict their practical applications. Thin-film piezocatalysts, which not only exhibit good recyclability but also fully contact with solution, are believed to be one of the solutions to address these problems. In this work, the nanostructured BaTiO3 (BTO) thin films were fabricated by a facile hydrothermal method for their potential applications in piezocatalysis. The vertically standing BTO nanosheets grown on the top of TiO2 nanorod arrays exhibited superior piezocatalytic performance as well as piezo-electrochemical property. Given the different strain states between thin-film piezocatalyst and powder-form piezocatalyst, both the impact force of water and isostatic pressure are taken into consideration in finite element method (FEM) simulation. The FEM simulation shows that a stronger piezoelectric filed can be built in BTO nanosheets because of their easier deformation, and thus can lead to a higher piezocatalytic degradation efficiency. Our work presented here is expected to provide a potential route for the nanoengineering of thin-film piezocatalysts and clarify the catalytic mechanism for substrate-fixed piezocatalysts.
中文翻译：
TiO 2纳米棒阵列上生长的BaTiO 3纳米片和盖作为压电催化剂的薄膜催化剂
粉末状压电催化剂的可回收性差，并可能造成严重的二次污染，这限制了它们的实际应用。薄膜压电催化剂不仅显示出良好的可回收性，而且与溶液完全接触，被认为是解决这些问题的解决方案之一。在这项工作中，通过简便的水热法制备了纳米结构的BaTiO 3（BTO）薄膜，以用于压电催化领域。在TiO 2顶部生长的垂直站立的BTO纳米片纳米棒阵列表现出优异的压电催化性能以及压电电化学性能。鉴于薄膜压电催化剂和粉末状压电催化剂的应变状态不同，在有限元方法（FEM）模拟中考虑了水的冲击力和等静压。有限元模拟表明，由于BTO纳米片易于变形，因此可以在BTO纳米片中建立更强的压电场，从而可以提高压电催化降解效率。我们在这里提出的工作有望为薄膜压电催化剂的纳米工程化提供潜在的途径，并阐明底物固定的压电催化剂的催化机理。
更新日期：2020-03-12
中文翻译：
TiO 2纳米棒阵列上生长的BaTiO 3纳米片和盖作为压电催化剂的薄膜催化剂
粉末状压电催化剂的可回收性差，并可能造成严重的二次污染，这限制了它们的实际应用。薄膜压电催化剂不仅显示出良好的可回收性，而且与溶液完全接触，被认为是解决这些问题的解决方案之一。在这项工作中，通过简便的水热法制备了纳米结构的BaTiO 3（BTO）薄膜，以用于压电催化领域。在TiO 2顶部生长的垂直站立的BTO纳米片纳米棒阵列表现出优异的压电催化性能以及压电电化学性能。鉴于薄膜压电催化剂和粉末状压电催化剂的应变状态不同，在有限元方法（FEM）模拟中考虑了水的冲击力和等静压。有限元模拟表明，由于BTO纳米片易于变形，因此可以在BTO纳米片中建立更强的压电场，从而可以提高压电催化降解效率。我们在这里提出的工作有望为薄膜压电催化剂的纳米工程化提供潜在的途径，并阐明底物固定的压电催化剂的催化机理。
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