Interface engineering via temperature-dependent self-transformation on SnS2/SnS for enhanced piezocatalysis

IF 15.7 1区化学 Q1 CHEMISTRY, APPLIED Chinese Journal of Catalysis Pub Date : 2024-09-01 DOI:10.1016/S1872-2067(24)60101-4

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Abstract

Heterojunction has been widely used in vibration-driven piezocatalysis for enhanced charges separation, while the weak interfaces seriously affect the efficiency during mechanical deformations due to prepared by traditional step-by-step methods. Herein, the intimate contact interfaces with shared S atoms are ingeniously constructed in SnS₂/SnS anchored on porous carbon by effective interface engineering, which is in-situ derived from temperature-dependent self-transformation of SnS₂. Benefiting from intimate contact interfaces, the piezoelectricity is remarkably improved due to the larger interfacial dipole moment caused by uneven distribution of charges. Importantly, vibration-induced piezoelectric polarization field strengthens the interfacial electric field to further promote the separation and migration of charges. The dynamic charges then transfer in porous carbon with high conductivity and adsorption for significantly improved piezocatalytic activity. The degradation efficiency of bisphenol A (BPA) is 6.3 times higher than SnS₂ and H₂ evolution rate is increased by 3.8 times. Compared with SnS₂/SnS prepared by two-step solvothermal method, the degradation efficiency of BPA and H₂ evolution activity are increased by 3 and 2 times, respectively. It provides a theoretical guidance for developing various multiphase structural piezocatalyst with strong interface interactions to improve the piezocatalytic efficiency.

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通过 SnS2/SnS 上随温度变化的自转化实现界面工程，从而增强压电催化作用

异质结被广泛应用于振动驱动的压电催化中，以增强电荷分离，但由于采用传统的分步法制备，弱界面严重影响了机械变形时的效率。在这里，通过有效的界面工程，在多孔碳上锚定的 SnS2/SnS 中巧妙地构建了具有共享 S 原子的亲密接触界面。由于电荷分布不均导致界面偶极矩增大，亲密接触界面的压电性得到显著提高。重要的是，振动引起的压电极化场加强了界面电场，进一步促进了电荷的分离和迁移。然后，动态电荷在具有高导电性和吸附性的多孔碳中转移，从而显著提高了压电催化活性。双酚 A（BPA）的降解效率是 SnS2 的 6.3 倍，H2 的进化速率提高了 3.8 倍。与两步溶热法制备的 SnS2/SnS 相比，双酚 A 的降解效率和 H2 的进化活性分别提高了 3 倍和 2 倍。这为开发具有强界面相互作用的各种多相结构压电催化剂以提高压电催化效率提供了理论指导。

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来源期刊

Chinese Journal of Catalysis 工程技术-工程：化工

CiteScore

25.80

自引率

10.30%

发文量

235

审稿时长

1.2 months

期刊介绍： The journal covers a broad scope, encompassing new trends in catalysis for applications in energy production, environmental protection, and the preparation of materials, petroleum chemicals, and fine chemicals. It explores the scientific foundation for preparing and activating catalysts of commercial interest, emphasizing representative models.The focus includes spectroscopic methods for structural characterization, especially in situ techniques, as well as new theoretical methods with practical impact in catalysis and catalytic reactions.The journal delves into the relationship between homogeneous and heterogeneous catalysis and includes theoretical studies on the structure and reactivity of catalysts.Additionally, contributions on photocatalysis, biocatalysis, surface science, and catalysis-related chemical kinetics are welcomed.