Enhancing the photodegradation of Metronidazole under natural sunlight using a new Co3O4/HMS semiconductor–insulator photocatalytic heterojunction

IF 2.8 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Research on Chemical Intermediates Pub Date : 2024-06-24 DOI:10.1007/s11164-024-05330-5

Thiziri Djelloudi, Ouardia Zekri, Fouzia Touahra, Franck Launay

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Abstract

The design of new specific photocatalysts to achieve excellent photocatalytic performances in the photodegradation of organic pollutants, specially the nonbiodegraded ones, is of a crucial importance nowadays to clean the contaminated water resources aiming to solve the problem of shortage in clean water. In this work, a cobalt supported over hexagonal mesoporous silica (9%Co/HMS) catalyst was synthesized and applied in the removal of Metronidazole in aqueous solutions by photodegradation under sunlight. An unexpected excellent photocatalytic performance was obtained (97% of MNZ removal in sunny days vs. 74% in cloudy days). This excellent performance results from the creation of a semiconductor–insulator heterojunction between Co₃O₄ and the carrier HMS. Even more interesting, the removal efficiency was kept up four cycles. Therefore, this study may provide a new opportunity for the future development of high-performance heterogeneous catalysts based on mesoporous silica in aquatic environmental pollution control in either sunny or cloudy weather.

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利用新型 Co3O4/HMS 半导体-绝缘体光催化异质结促进甲硝唑在自然光下的光降解

如今，设计新型特异性光催化剂，使其在光降解有机污染物（尤其是非生物降解有机污染物）时具有优异的光催化性能，对于清洁受污染的水资源，解决清洁水短缺问题至关重要。本研究合成了一种六方介孔二氧化硅（9%Co/HMS）钴支撑催化剂，并将其应用于在阳光下通过光降解去除水溶液中的甲硝唑。催化剂获得了意想不到的优异光催化性能（晴天 MNZ 去除率为 97%，阴天为 74%）。这种优异的性能源于 Co3O4 与载流子 HMS 之间形成的半导体-绝缘体异质结。更有趣的是，去除效率保持了四个周期。因此，这项研究为未来开发基于介孔二氧化硅的高性能异相催化剂提供了新的契机，这种催化剂可用于晴天或阴天的水环境污染控制。

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来源期刊

Research on Chemical Intermediates 化学-化学综合

CiteScore

5.70

自引率

18.20%

发文量

229

审稿时长

2.6 months

期刊介绍： Research on Chemical Intermediates publishes current research articles and concise dynamic reviews on the properties, structures and reactivities of intermediate species in all the various domains of chemistry. The journal also contains articles in related disciplines such as spectroscopy, molecular biology and biochemistry, atmospheric and environmental sciences, catalysis, photochemistry and photophysics. In addition, special issues dedicated to specific topics in the field are regularly published.