Inverse opal type porous g-C3N4 towards H2O2 production and in-situ photoFenton gemifloxacin degradation driven by amorphous framework and nitrogen vacancy

IF 4.8 2区化学 Q2 CHEMISTRY, PHYSICAL Applied Catalysis A: General Pub Date : 2025-01-27 DOI:10.1016/j.apcata.2025.120141

Sriram Mansingh , Kundan Kumar Das , Ritik Mohanty , Newmoon Priyadarshini, Kulamani Parida

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Abstract

H₂O₂ production by utilizing renewable feedstocks like solar energy, H₂O and O₂ through artificial photocatalysis is an intriguing area of sustainable research. Porous and defect-oriented g-C₃N₄ is a promising metal free material for photon driven H₂O₂ generation via. O₂/H₂O redox pathway because of its benefitting features. The designed vacancy-oriented carbon nitride with amorphous character along with inverse opal type framework boost the overall O2 reduction rate and on-situ gemifloxacine (GFM) degradation. The PCN sample manifest the optimum peroxide generation (587 µmol/g/h and conversion efficiency of 0.011 %) which is 1.4 times higher than CN. The photoreduction goes predominantly via. both single electron two step, i.e., ^●O₂^- radical route confirms by scavenger and EPR test. Further, reduction reaction was also evaluated under different reaction condition, i.e., pH, sacrificial agent and purging gas type. Besides, PCN depicts enhanced onsite photo-fenton GFM degradation (78 % in 1 h) and the formed intermediates species alongside the mineralization 70 % is well demonstrated. This investigation serves as a guideline for the development of different amorphous and defect based photocatalysts for sustainable H₂O₂ generation and on-site photo-fenton activity with benchmark efficiency

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反蛋白石型多孔g-C3N4在非晶态框架和氮空位驱动下对H2O2生成和原位光芬顿-吉氟沙星降解的影响

利用太阳能、水和O2等可再生原料通过人工光催化生产H2O2是可持续研究的一个有趣领域。多孔和缺陷导向的g-C3N4是一种很有前途的光子驱动生成H2O2的无金属材料。O2/H2O氧化还原途径的有利特性。设计的具有无定形特征的空位取向氮化碳与反蛋白石型框架一起提高了总体O2还原速率和原位吉氟沙星（GFM）的降解。PCN的最佳过氧化物生成率为587µmol/g/h，转化效率为0.011 %，是CN的1.4倍。光还原主要通过。通过清除剂和EPR试验证实了单电子两步即●O2自由基路线。此外，还对不同反应条件下的还原反应进行了评价，即pH、牺牲剂和净化气体类型。此外，PCN描述了现场光芬顿GFM降解增强（1 h内78 %），并且与矿化一起形成的中间物质70 %得到了很好的证明。该研究为开发不同的非晶型和缺陷型光催化剂提供了指导，这些催化剂具有可持续的H2O2生成和基准效率的现场光fenton活性

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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.

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