Promotion in styrene removal through visible light driven photocatalytic oxidation over Ni coated g-C3N4

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General Pub Date : 2025-07-10 DOI:10.1016/j.apcata.2025.120444

Birgitta Narindri Rara Winayu , Yu-Lin Chen , Hsin Chu

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引用次数: 0

Abstract

A type of harmful volatile organic compounds (VOCs), styrene, is crucial to be removed from the indoor environment. Implementation of g-C₃N₄ for photocatalytic oxidation of VOCs has the limitation for its operation under visible light due to its wide band gap but can be modified by doping with metal oxides. In this study, the improvement in photocatalytic oxidation of styrene over g-C₃N₄ was tested under various ratios of Ni coating. 0.1 wt%Ni/g-C₃N₄ achieved the highest styrene conversion of 49.6 ± 0.5 % and further applied in the examination under various operating conditions (temperature, relative humidity, retention time, and inlet concentration of styrene). The presence of water vapor molecules at more than 1 % relative humidity declined the photocatalytic activity of 0.1 wt%Ni/g-C₃N₄ due to the competitive adsorption on the active site. Following assessment were conducted for radical scavengers examination, exhausted gas compositions with intermediates, building of proposed reaction mechanism, and development of reaction kinetics.

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Ni包覆g-C3N4上可见光催化氧化对苯乙烯脱除的促进作用

一种有害的挥发性有机化合物（VOCs），苯乙烯，从室内环境中清除是至关重要的。g-C3N4光催化氧化VOCs由于其带隙较宽，在可见光下的操作受到限制，但可以通过掺杂金属氧化物进行修饰。在本研究中，测试了不同比例的Ni涂层对g-C3N4光催化氧化苯乙烯的改善作用。0.1 wt%Ni/g-C3N4的最高苯乙烯转化率为49.6 ± 0.5 %，并进一步应用于各种操作条件（温度、相对湿度、保留时间和苯乙烯进口浓度）下的测试。当相对湿度大于1 %时，水蒸气分子的存在降低了0.1 wt%Ni/g-C3N4的光催化活性，这是由于活性位点上的竞争性吸附。随后进行了自由基清除剂检测、废气中间体组成、反应机理的建立和反应动力学的发展。

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来源期刊

Applied Catalysis A: General 化学-环境科学

CiteScore

9.00

自引率

5.50%

发文量

415

审稿时长

24 days

期刊介绍： Applied Catalysis A: General publishes original papers on all aspects of catalysis of basic and practical interest to chemical scientists in both industrial and academic fields, with an emphasis onnew understanding of catalysts and catalytic reactions, new catalytic materials, new techniques, and new processes, especially those that have potential practical implications. Papers that report results of a thorough study or optimization of systems or processes that are well understood, widely studied, or minor variations of known ones are discouraged. Authors should include statements in a separate section "Justification for Publication" of how the manuscript fits the scope of the journal in the cover letter to the editors. Submissions without such justification will be rejected without review.