Improvement of photo-electrocatalytic CO2 reduction on boron-doped-g-C3N4 supported with Fe-MOF (NH2-MIL-101)

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-06-09 DOI:10.1016/j.jphotochem.2025.116544

Mahmood Riyadh Atta , Akram Fadhl Al-Mahmodi , Baker Nasser Saleh Al-Dhawi , Ali Khatib Juma , Zulkifli Merican Aljunid Merican , Maizatul Shima Shaharun , Md. Maksudur Rahman Khan

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引用次数: 0

Abstract

This study investigates the photo-electrocatalytic capabilities of graphitic carbon nitride (g-C₃N₄) and boron-doped g-C₃N₄ when combined with NH₂-MIL-101(Fe). Various analytical techniques are utilized to characterize the physicochemical properties of these catalysts. Incorporating NH₂-MIL-101 alters the crystalline size and structure, resulting in decreased band gap energies. Catalyst performance is evaluated through cyclic voltammetry, linear sweep voltammetry, and electrochemical impedance spectroscopy. The findings show a considerable shift in the electrochemical behavior of B-g-C₃N₄/NH₂-MIL-101 in light and dark conditions, particularly an increase in current density. Furthermore, CO₂ reduction to ethanol is examined using continuous light exposure and CO₂ bubbling, where the B-g-C₃N₄/NH₂-MIL-101 electrode achieves the highest ethanol production rate of 17.69 µmole/cm²·h at −1 V vs. NHE. Amid the growing urgency for efficient and sustainable CO₂ valorization strategies, this study addresses a critical need by developing and evaluating MOF–g-C₃N₄-based composites that enhance light-driven electrocatalytic performance. This research underscores the promising potential of these composites in photo-electrocatalysis, especially B-g-C₃N₄/NH₂-MIL-101, for its notable efficiency and stability.

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Fe-MOF （NH2-MIL-101）负载的硼掺杂g- c3n4光电催化CO2还原性能的改进

本研究考察了石墨氮化碳（g-C3N4）和掺硼的g-C3N4与NH2-MIL-101（Fe）结合时的光电催化性能。各种分析技术被用来表征这些催化剂的物理化学性质。加入NH2-MIL-101改变了晶体尺寸和结构，导致带隙能量降低。通过循环伏安法、线性扫描伏安法和电化学阻抗谱来评价催化剂的性能。研究结果表明，B-g-C3N4/NH2-MIL-101在光照和黑暗条件下的电化学行为发生了相当大的变化，特别是电流密度的增加。此外，使用连续光照和CO2鼓泡法检测CO2还原为乙醇，其中B-g-C3N4/NH2-MIL-101电极在−1 V与NHE下的乙醇产率最高，为17.69 μ mol /cm2·h。在高效和可持续的二氧化碳增值策略日益紧迫的背景下，本研究通过开发和评估mof - g- c3n4基复合材料来提高光驱动电催化性能，解决了一个关键需求。这项研究强调了这些复合材料在光电催化方面的潜力，特别是B-g-C3N4/NH2-MIL-101，其显著的效率和稳定性。

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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.