Bifunctional Photocatalysis Toward Efficient NOx Removal Performance and Water Splitting Activity: A Case of TiO2/g-C3N4

IF 2.8 3区 化学 Q2 CHEMISTRY, APPLIED
Viet Van Pham, Thach Khac Bui, Trang Thu Thi Nguyen, Khang Nhat Nguyen, Hoang Thai Nguyen, Hai Viet Le
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引用次数: 0

Abstract

Studies about emissions reduction and treatment, and renewable energy generation are sustainable development goals of the United Nations. Therein, photocatalysts have emerged as highly attractive multifunctional materials due to their versatile applications in environmental remediation and energy production. In this study, a bifunctional photocatalyst, TiO2/g-C3N4, was synthesized for the purpose of NOx removal and water splitting. Various weight ratios of commercially available TiO2 were combined with g-C3N4 synthesized through a pyrolysis method. The findings demonstrate that the 10%-TiO2/g-C3N4 composite exhibited a notably high NO removal rate of 48.34% and minimal NO2 yield compared to pure g-C3N4. The incorporation of TiO2 onto g-C3N4 induced bandgap restructuring, resulting in a significant enhancement in photocurrent density, with a maximum increase of 25 μA cm−2 at 1.23 V. Moreover, the combination of g-C3N4 with 10% TiO2 exhibited promising electrocatalytic potential for the oxygen evolution reaction, as indicated by an overpotential of 0.44 V. Overall, the utilization of bifunctional photocatalysis with TiO2/g-C3N4 holds great promise as an effective approach for both NOx removal and water splitting applications. This combination offers potential solutions for addressing environmental challenges and advancing renewable energy technologies.

实现高效氮氧化物去除性能和水分离活性的双功能光催化:以 TiO2/g-C3N4 为例
摘要 有关减排和处理以及可再生能源发电的研究是联合国的可持续发展目标。其中,光催化剂因其在环境修复和能源生产中的广泛应用而成为极具吸引力的多功能材料。本研究合成了一种双功能光催化剂 TiO2/g-C3N4,用于去除氮氧化物和分水。将不同重量比的市售 TiO2 与通过热解方法合成的 g-C3N4 结合在一起。研究结果表明,与纯 g-C3N4 相比,10%-TiO2/g-C3N4 复合材料的氮氧化物去除率高达 48.34%,且二氧化氮产量极低。此外,g-C3N4 与 10% TiO2 的结合在氧进化反应中表现出良好的电催化潜力,过电位为 0.44 V。总之,利用 TiO2/g-C3N4 的双功能光催化技术有望成为去除氮氧化物和水分离应用的有效方法。这种组合为应对环境挑战和推进可再生能源技术提供了潜在的解决方案。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Topics in Catalysis
Topics in Catalysis 化学-物理化学
CiteScore
5.70
自引率
5.60%
发文量
197
审稿时长
2 months
期刊介绍: Topics in Catalysis publishes topical collections in all fields of catalysis which are composed only of invited articles from leading authors. The journal documents today’s emerging and critical trends in all branches of catalysis. Each themed issue is organized by renowned Guest Editors in collaboration with the Editors-in-Chief. Proposals for new topics are welcome and should be submitted directly to the Editors-in-Chief. The publication of individual uninvited original research articles can be sent to our sister journal Catalysis Letters. This journal aims for rapid publication of high-impact original research articles in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.
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