Pt-doped g-C3N4 photocatalyst for simultaneous hydrogen production and value-added chemical synthesis under visible light.

IF 2.7 3区 化学 Q3 BIOCHEMISTRY & MOLECULAR BIOLOGY
Photochemical & Photobiological Sciences Pub Date : 2025-02-01 Epub Date: 2025-02-20 DOI:10.1007/s43630-025-00683-1
Marwa Moussa, Abdessalem Hamrouni, Nawres Lazaar, Mounir Ferhi, Ichraf Chérif, Hinda Lachheb, Cláudia G Silva, Maria J Sampaio, Joaquim L Faria
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引用次数: 0

Abstract

Metal-free photocatalysts, especially through the use of semi-conductors g-C3N4 (graphitic carbon nitride, CN) have become a prominent topic due to their sustainable advantages and promising effectiveness in hydrogen (H2) production. However, CN material requires specific modifications, since its efficacy under visible light suffers from fast recombination of electron/hole pairs (e/h+), slow charge transfer and limited surface area. In this study, we present the synthesis of CN via the thermal treatment of urea and melamine mixture. To enhance its crystallinity and photocatalytic performance, Pt nanoparticles were loaded onto CN by simple incipient wetness impregnation method. The H2 production was investigated through the potential application of aromatic alcohols including anisyl (AA), benzyl (BA), piperonol (PA), and methanol (M) alcohols, as sacrificial reagents. H2 production was achieved using the hybrid Pt-CN system with the added benefit of value-added organic synthesis under visible light exposure. The Pt-CN photocatalyst exhibited varying H2 evolution rates on the alcohol used as sacrificial reagent, with the PA yielding to the highest rate of 503.5 µmol·g-1·h-1. Stability assessments confirmed the robustness of the synthesized Pt-CN photocatalyst across three consecutive visible light driven experiments. Notably, piperonal (P) synthesis occurred along with H2 production under visible light. Comprehensive structural, textural, morphologic, optoelectronic and electrochemical characterizations were performed correlating the Pt-CN's properties with its visible photocatalytic performance.

可见光下同时产氢和增值化学合成的掺杂pt g-C3N4光催化剂。
无金属光催化剂,特别是通过使用半导体的g-C3N4(石墨化碳氮,CN)由于其可持续的优势和在氢(H2)生产中有前景的有效性而成为一个突出的话题。然而,CN材料需要特定的修饰,因为它在可见光下的效率受到电子/空穴对(e - /h+)快速重组、电荷转移缓慢和表面积有限的影响。在本研究中,我们介绍了尿素和三聚氰胺混合物的热处理合成CN。为了提高其结晶度和光催化性能,采用简单的初始湿浸渍法将Pt纳米颗粒负载到CN上。以茴香基(AA)、苄基(BA)、胡椒醇(PA)和甲醇(M)醇为牺牲剂,研究了其产氢的潜在应用。利用Pt-CN混合体系实现了制氢,并在可见光下进行了增值有机合成。Pt-CN光催化剂对牺牲试剂乙醇的析氢速率不同,其中PA的最高收率为503.5µmol·g-1·h-1。稳定性评估通过三个连续的可见光驱动实验证实了合成的Pt-CN光催化剂的稳健性。值得注意的是,在可见光下,辣椒醛(P)的合成伴随着H2的生成。对Pt-CN的结构、织构、形貌、光电和电化学性能进行了全面表征,并将其与可见光催化性能进行了对比。
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
Photochemical & Photobiological Sciences
Photochemical & Photobiological Sciences 生物-生化与分子生物学
CiteScore
5.60
自引率
6.50%
发文量
201
审稿时长
2.3 months
期刊介绍: A society-owned journal publishing high quality research on all aspects of photochemistry and photobiology.
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