Porosity Tuning of MoS2/Graphene Aerogel via the Boudouard Reaction for Enhanced Degradation of Tetracycline under Visible-Light

IF 3.8 3区工程技术 Q2 ENGINEERING, CHEMICAL

Industrial & Engineering Chemistry Research Pub Date : 2025-03-21 DOI:10.1021/acs.iecr.4c04898

Chinmayee Das, Tajamul Shafi, Brajesh Kumar Dubey, Shamik Chowdhury

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引用次数: 0

Abstract

Composite aerogel photocatalysts (CAPs) offer enhanced stability, easy recovery, and high photocatalytic performance. Optimizing the porosity, morphology, and interconnectivity of the pores in CAPs is essential for effective photocatalysis. In this study, a molybdenum disulfide/graphene CAP was synthesized and modified through physical activation to improve its photocatalytic activity for tetracycline (TC) degradation under visible-light irradiation. Activation with carbon dioxide (CO₂) significantly enhanced photocatalytic performance by increasing specific surface area, pore volume, and mesopore size, thereby improving light absorption and charge separation. This enhancement resulted from the Boudouard reaction, which created pores or defects in the graphene lattice. However, excessive pore formation could compromise the structural integrity of the graphene sheets. The CAP activated at 750 °C degraded 95% of TC in 90 min under visible light, outperforming both unactivated and chemically activated CAPs. These results demonstrate that CO₂-mediated physical activation is a promising approach to improving CAP performance for wastewater treatment.

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复合气凝胶光催化剂（CAP）具有更高的稳定性、易回收性和光催化性能。优化气凝胶光催化剂的孔隙率、形态和孔隙间的相互连接性对于实现有效的光催化至关重要。本研究合成了一种二硫化钼/石墨烯 CAP，并通过物理活化对其进行改性，以提高其在可见光照射下降解四环素（TC）的光催化活性。二氧化碳（CO2）活化可增加比表面积、孔体积和中孔尺寸，从而改善光吸收和电荷分离，从而显著提高光催化性能。这种增强作用源于布杜尔反应，该反应在石墨烯晶格中形成了孔隙或缺陷。然而，过多的孔隙形成会破坏石墨烯片的结构完整性。在可见光下，750 °C 下激活的 CAP 在 90 分钟内降解了 95% 的 TC，其性能优于未激活和化学激活的 CAP。这些结果表明，以二氧化碳为媒介的物理活化是提高废水处理 CAP 性能的一种可行方法。

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来源期刊

Industrial & Engineering Chemistry Research 工程技术-工程：化工

CiteScore

7.40

自引率

7.10%

发文量

1467

审稿时长

2.8 months

期刊介绍： ndustrial & Engineering Chemistry, with variations in title and format, has been published since 1909 by the American Chemical Society. Industrial & Engineering Chemistry Research is a weekly publication that reports industrial and academic research in the broad fields of applied chemistry and chemical engineering with special focus on fundamentals, processes, and products.