MIL-68(In)衍生的In2O3/In2S3/C：原位合成和高效可见光光催化H2O2生成,Applied Organometallic Chemistry

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MIL-68(In)衍生的In2O3/In2S3/C：原位合成和高效可见光光催化H2O2生成
Applied Organometallic Chemistry ( IF 3.7 ) Pub Date : 2023-12-26 , DOI: 10.1002/aoc.7340
Xia Zhang ₁ , Haimeng Qiao ₁ , Qi Zhang ₁ , Wanruo Hu ₁ , Zhongqiao Sun ₁ , Yide Han ₁ , Hao Meng ₁

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光催化还原O ₂生成H ₂ O ₂显示出优异的环境友好性和可控的H ₂ O _{2浓度，在H}₂ O ₂辅助氧化还原中具有应用前景。本文选择MIL-68(In)作为牺牲前驱体，通过原位硫化和热解相结合的方法构建了In ₂ O ₃ /In ₂ S ₃ /C多组分光催化剂。所得的In ₂ O ₃ /In ₂ S ₃ /C继承了MIL-68(In)的几何形状，代表了具有粗糙表面的中空微管。系统研究了In ₂ O ₃ /In ₂ S ₃ /C光催化生成H ₂ O ₂的活性，并与原位硫化合成的In ₂ S ₃ /MIL-68进行了对比测试。热解，探索In ₂ O ₃ /In ₂ S ₃ /C异质结构的优势。 In 2 O 3 /In 2 S 3 /C的光催化H 2 O 2 释放效果_最好，₁ h_内的_H₂ O ₂释放值为934.6 μmol/L，高于In ₂ S _{3 /MIL-68和In 2 S 3} /MIL-68。其他先前报道的光催化剂。光电化学分析和ESR测量表明，接触异质结和匹配带电势是电子和空穴有效分离的原因，O ₂^{·-是光催化H}₂ O ₂析出的主要活性物质。优异的光催化活性、结构稳定性和易于调节的H ₂ O ₂浓度使In ₂ O ₃ /In ₂ S ₃ /C在H ₂ O ₂辅助氧化还原反应中具有广阔的应用前景。

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MIL-68(In)-derived In2O3/In2S3/C: In situ synthesis and efficient visible-light photocatalytic H2O2 generation

Photocatalytic reduction of O₂ to generate H₂O₂ shows an excellent environment friendly nature and the controllable H₂O₂ concentrations and is found the prospect of applications in H₂O₂-assisted redox. In this paper, MIL-68(In) is chosen as a sacrifice precursor to construct a multi-component photocatalyst of In₂O₃/In₂S₃/C by integrated in situ sulfidation and pyrolysis routes. The resulting In₂O₃/In₂S₃/C inherited the geometry of MIL-68(In) and represents the hollow microtube with rough surface. The photocatalytic activity of the In₂O₃/In₂S₃/C in H₂O₂ generation is investigated systematically, and the contrast tests were conducted over the In₂S₃/MIL-68 synthesized by in situ sulfidation but without subsequent pyrolysis, to explore the advantages of the In₂O₃/In₂S₃/C heterostructure. The best photocatalytic H₂O₂ evolution is observed by the In₂O₃/In₂S₃/C with a value of 934.6 μmol/L within 1 h, which is higher than that by In₂S₃/MIL-68 and other previously reported photocatalysts. The photoelectrochemical analyses and ESR measurements clarify that contact heterojunction and matched band potentials are responsible for the effective separation of electrons and holes, and the O₂^·- are the main active species in the photocatalytic H₂O₂ evolution. The outstanding photocatalytic activity, structure stability, and the easily regulated H₂O₂ concentrations render the In₂O₃/In₂S₃/C the prospect applications in the H₂O₂-assisted redox reactions.

更新日期：2023-12-26

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