Synthesis of novel ZnIn0.2Ga1.8O4/CaIn2S4 composite material with S-scheme heterojunction for efficient photocatalytic degradation of organic pollutants and hydrogen evolution

IF 5.9 3区材料科学 Q2 CHEMISTRY, PHYSICAL FlatChem Pub Date : 2023-12-09 DOI:10.1016/j.flatc.2023.100595

Yupeng Shi , Zisheng Guan , Changchun Chen , Xinhui Zhu , Jianhai Wang , Yifeng Wang , Lin Pan , Yaru Ni

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Abstract

Semiconductor photocatalysts that can both photocatalytic evolve hydrogen from water and degrade organic pollutants are very important to solve the problem of energy shortage and environmental pollution. The S-scheme ZnIn_0.2Ga_1.8O_4/CaIn₂S₄ complex was successfully synthesized using sol–gel and oil bath methods. Characterization technique indicates that chrysanthemum-shaped CaIn₂S₄ is anchored on the surface of irregular nanoparticles ZnIn_0.2Ga_1.8O₄, forming a closely packed heterostructure. The bandgap values of CaIn₂S₄ and Zn(In_0.1Ga_0.9)₂O₄ were determined as 2.11 eV and 3.61 eV, respectively. Under visible-light irradiation, the ZnIn_0.2Ga_1.8O_4/CaIn₂S₄-1(ZC-1) photocatalyst exhibited superior performance in degrading an organic pollutant (RhB) and generating hydrogen compared to ZnGa₂O₄, ZnIn_0.2Ga_1.8O₄, and CaIn₂S₄ alone. The photocatalytic degradation of RhB using ZC-1 was 1.7, 1.31, and 1.14 times higher than that of ZnGa₂O₄, ZnIn_0.2Ga_1.8O₄, and CaIn₂S₄, respectively. Moreover, the photocatalytic hydrogen evolution rate of ZC-1 was 5.8, 3.7, and 13 times higher than that of ZnGa₂O₄, ZnIn_0.2Ga_1.8O₄, and CaIn₂S₄, respectively. The formation of S-type heterojunctions in the composite photocatalysts was confirmed through free radical trapping and electron paramagnetic resonance tests, further enhancing hydrogen production and organic pollutant degradation. This study presents a novel approach for developing ZnGa₂O₄-based composite photocatalysts with S-scheme heterojunctions to address energy shortage and environmental pollution in the future.

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合成具有 S 型异质结的新型 ZnIn0.2Ga1.8O4/CaIn2S4 复合材料，用于高效光催化降解有机污染物和氢气生成

既能光催化从水中蒸发氢气，又能降解有机污染物的半导体光催化剂对于解决能源短缺和环境污染问题非常重要。采用溶胶-凝胶法和油浴法成功合成了 S 型 ZnIn0.2Ga1.8O4/CaIn2S4 复合物。表征技术表明，菊花状的 CaIn2S4 被锚定在不规则纳米粒子 ZnIn0.2Ga1.8O4 的表面，形成了紧密堆积的异质结构。经测定，CaIn2S4 和 Zn（In0.1Ga0.9）2O4 的带隙值分别为 2.11eV 和 3.61eV。在可见光照射下，ZnIn0.2Ga1.8O4/CaIn2S4-1（ZC-1）光催化剂与 ZnGa2O4、ZnIn0.2Ga1.8O4 和 CaIn2S4 相比，在降解有机污染物（RhB）和产生氢气方面表现出更优异的性能。ZC-1 对 RhB 的光催化降解率分别是 ZnGa2O4、ZnIn0.2Ga1.8O4 和 CaIn2S4 的 1.7、1.31 和 1.14 倍。此外，ZC-1 的光催化氢进化率分别是 ZnGa2O4、ZnIn0.2Ga1.8O4 和 CaIn2S4 的 5.8、3.7 和 13 倍。通过自由基捕获和电子顺磁共振测试证实了复合光催化剂中 S 型异质结的形成，从而进一步提高了制氢能力和有机污染物的降解能力。本研究为开发具有 S 型异质结的 ZnGa2O4 基复合光催化剂提供了一种新方法，可用于解决未来的能源短缺和环境污染问题。

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来源期刊

FlatChem Multiple-

CiteScore

8.40

自引率

6.50%

发文量

104

审稿时长

26 days

期刊介绍： FlatChem - Chemistry of Flat Materials, a new voice in the community, publishes original and significant, cutting-edge research related to the chemistry of graphene and related 2D & layered materials. The overall aim of the journal is to combine the chemistry and applications of these materials, where the submission of communications, full papers, and concepts should contain chemistry in a materials context, which can be both experimental and/or theoretical. In addition to original research articles, FlatChem also offers reviews, minireviews, highlights and perspectives on the future of this research area with the scientific leaders in fields related to Flat Materials. Topics of interest include, but are not limited to, the following: -Design, synthesis, applications and investigation of graphene, graphene related materials and other 2D & layered materials (for example Silicene, Germanene, Phosphorene, MXenes, Boron nitride, Transition metal dichalcogenides) -Characterization of these materials using all forms of spectroscopy and microscopy techniques -Chemical modification or functionalization and dispersion of these materials, as well as interactions with other materials -Exploring the surface chemistry of these materials for applications in: Sensors or detectors in electrochemical/Lab on a Chip devices, Composite materials, Membranes, Environment technology, Catalysis for energy storage and conversion (for example fuel cells, supercapacitors, batteries, hydrogen storage), Biomedical technology (drug delivery, biosensing, bioimaging)