Efficient visible-light-driven photocatalytic degradation of indoor formaldehyde using an indium-based MOF/graphene oxide composite

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2024-10-22 DOI:10.1016/j.jphotochem.2024.116102

Yuanyuan Yao , Jiang Yuan , Zhaochen Wang , Yanwei Zhao , Jiameng Xu , Mo Liu , Jounghyung Cho , Fuqiang Li

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Abstract

Formaldehyde (HCHO) severely degrades indoor air quality, and conventional remediation methods are often inadequate for addressing low concentrations of HCHO indoors. In this study, we synthesized a MIL-68(In)-NH₂/graphene oxide (GO) composite using a solvothermal method, aimed specifically at enhancing the photocatalytic degradation of HCHO under visible light. Our results show that the integration of GO enhances visible light absorption and facilitates efficient electron transport, significantly improving photocatalytic performance. The MIL-68(In)-NH₂/GO composite achieves a 77 % degradation rate of HCHO, significantly outperforming MIL-68(In)-NH₂ (51 %) and GO (22 %) alone. This enhanced activity is attributed to the effective separation of electron-hole pairs and synergistic interactions within the composite. We proposed an enhanced photocatalytic mechanism for the MIL-68(In)-NH₂/GO system, identifying h⁺ and •O₂^– as the principal active species. Moreover, the MIL-68(In)-NH₂/GO composite shows excellent reusability and stability, making it a promising candidate for eco-friendly and efficient indoor air purification using metal–organic frameworks.

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利用铟基 MOF/氧化石墨烯复合材料在可见光驱动下高效光催化降解室内甲醛

甲醛（HCHO）会严重降低室内空气质量，而传统的治理方法往往不足以解决室内低浓度 HCHO 的问题。在本研究中，我们采用溶热法合成了一种 MIL-68(In)-NH2/氧化石墨烯（GO）复合材料，旨在增强可见光下 HCHO 的光催化降解能力。我们的研究结果表明，GO 的加入增强了对可见光的吸收，促进了有效的电子传输，显著提高了光催化性能。MIL-68(In)-NH2/GO 复合材料对 HCHO 的降解率达到 77%，明显优于单独使用 MIL-68(In)-NH2 （51%）和 GO （22%）的效果。活性的提高归功于复合材料内部电子-空穴对的有效分离和协同作用。我们提出了 MIL-68(In)-NH2/GO 系统的增强光催化机理，确定 h+ 和 -O2- 为主要活性物种。此外，MIL-68(In)-NH2/GO 复合材料显示出卓越的可重复使用性和稳定性，使其成为利用金属有机框架进行环保、高效的室内空气净化的理想候选材料。

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来源期刊

Journal of Photochemistry and Photobiology A-chemistry 化学-物理化学

CiteScore

7.90

自引率

7.00%

发文量

580

审稿时长

48 days

期刊介绍： JPPA publishes the results of fundamental studies on all aspects of chemical phenomena induced by interactions between light and molecules/matter of all kinds. All systems capable of being described at the molecular or integrated multimolecular level are appropriate for the journal. This includes all molecular chemical species as well as biomolecular, supramolecular, polymer and other macromolecular systems, as well as solid state photochemistry. In addition, the journal publishes studies of semiconductor and other photoactive organic and inorganic materials, photocatalysis (organic, inorganic, supramolecular and superconductor). The scope includes condensed and gas phase photochemistry, as well as synchrotron radiation chemistry. A broad range of processes and techniques in photochemistry are covered such as light induced energy, electron and proton transfer; nonlinear photochemical behavior; mechanistic investigation of photochemical reactions and identification of the products of photochemical reactions; quantum yield determinations and measurements of rate constants for primary and secondary photochemical processes; steady-state and time-resolved emission, ultrafast spectroscopic methods, single molecule spectroscopy, time resolved X-ray diffraction, luminescence microscopy, and scattering spectroscopy applied to photochemistry. Papers in emerging and applied areas such as luminescent sensors, electroluminescence, solar energy conversion, atmospheric photochemistry, environmental remediation, and related photocatalytic chemistry are also welcome.