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首页> 外文期刊>Catalysis science & technology >Construction of WO3-g-C3N4 composites as efficient photocatalysts for pharmaceutical degradation under visible light
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Construction of WO3-g-C3N4 composites as efficient photocatalysts for pharmaceutical degradation under visible light

机译：建设WO3-g-C3N4复合材料的高效论文对制药退化在可见光下

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摘要

Emerging organic contaminants (EOCs) like pharmaceuticals in the environment have become an emerging issue, which pose a threat to human health and environmental biodiversity. Many researchers have devoted their efforts to the development of novel technologies to effectively eliminate such pollutants from water cycles. In this work, we aimed to develop and employ heterogeneous WO3-g-C3N4 as an efficient photocatalyst for antibiotic degradation under visible light irradiation. Synthesis of WO3-g-C3N4 (WCN) composites was optimized with various g-C3N4 dosages and a facile hydrothermal method was used for material preparation. Sulfamethoxazole (SMX), which is one of the most commonly used antibiotics, was utilized as a model pharmaceutical to evaluate the degradation performance of the as-prepared WCN composites under visible light. Results showed that SMX removal efficiency can be largely improved by the WO3-g-C3N4 composites compared to bare WO3. In particular, the photocatalytic efficiency was raised to 91.7% when the optimized material WCN-8 was applied at a dosage of 1.0 g L-1. Such enhanced photocatalytic activity can be ascribed to the formation of direct solid-state Z-scheme heterojunctions between g-C3N4 and WO3, which could improve the photogenerated electron-hole pair separation efficiency as well as the redox capability. At the same time, the larger surface area and better visible light absorption capability can also contribute to the enhanced efficiency.
机译：新兴有机污染物(而是EOCs)环境已成为药品新兴的问题,这对人类构成威胁健康和环境生物多样性。研究人员把他们的努力新技术能够有效地发展消除这些污染物从水中周期。这个工作,我们旨在开发和使用异构WO3-g-C3N4作为高效光催化剂对抗生素降解可见光照射。WO3-g-C3N4 (WCN)复合材料进行优化各种g-C3N4剂量和灵巧的热液用于材料制备方法。磺胺甲恶唑(SMX),这是一种最常用的抗生素,是用作药品评价退化模型的性能和WCN复合材料在可见光。可以很大程度上提高去除效率WO3-g-C3N4比裸露的WO3复合材料。具体来说,光催化效率优化材料WCN-8时提高到91.7%应用剂量的1.0 g l - 1。提高光催化活性可以归结的形成直接的固态Z-scheme之间的垂直g-C3N4 WO3,可以提高photogenerated间吗对分离效率以及氧化还原能力。可见光区和更好的吸收还可以有助于增强能力效率。

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