A Sharp Jump in Photocatalytic Activity of Elemental Sulfur for Dye Degradation in Alkaline Solution,Photochemistry and Photobiology

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A Sharp Jump in Photocatalytic Activity of Elemental Sulfur for Dye Degradation in Alkaline Solution
Photochemistry and Photobiology ( IF 2.6 ) Pub Date : 2020-07-14 , DOI: 10.1111/php.13301
Vahideh Alvandi Peyman ₁ , Saeid Azizian ₁

Affiliation

Elemental sulfur is a low‐cost and abundant substance as one of the largest by‐products of the oil industry which was widely used in many industrial activities. Cyclo‐octasulfur (S8) is one of the sulfur allotropes that is a very stable substance in standard conditions. In this study, we report a low‐cost and fast method for the degradation of methyl violet in water under visible light and also sunlight by using elemental sulfur (S8). The results show that sulfur is a good photocatalyst which operates under visible light and can be utilized for degradation of methyl violet. The photocatalytic degradation of methyl violet in acidic, neutral, and alkaline media was investigated, and it was found that the photocatalytic efficiency increases dramatically in alkaline solution. The effects of the initial concentration of the dye, photocatalyst dosage, solution pH, and photocatalyst reusability were investigated. The kinetics of the reaction were studied in detail, and the photocatalytic rate equation was presented.

中文翻译：

元素硫在碱性溶液中降解染料的光催化活性急剧上升

元素硫是一种低成本、丰富的物质，是石油工业最大的副产品之一，广泛用于许多工业活动。环八硫 (S8) 是硫的同素异形体之一，在标准条件下是一种非常稳定的物质。在这项研究中，我们报告了一种使用元素硫 (S8) 在可见光和阳光下降解水中甲基紫的低成本、快速方法。结果表明，硫是一种在可见光下工作的良好光催化剂，可用于甲基紫的降解。研究了甲基紫在酸性、中性和碱性介质中的光催化降解，发现在碱性溶液中光催化效率显着提高。染料初始浓度、光触媒用量、研究了溶液的 pH 值和光催化剂的可重复使用性。详细研究了反应动力学，并给出了光催化速率方程。

更新日期：2020-07-14

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