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首页> 外文期刊>International Journal of Environmental Science and Technology >MnFe2O4/coal fly ash nanocomposite: a novel sunlight-active magnetic photocatalyst for dye degradation
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MnFe2O4/coal fly ash nanocomposite: a novel sunlight-active magnetic photocatalyst for dye degradation

机译：MNFE2O4 /煤粉煤灰纳米复合材料：一种用于染料降解的新型阳光活性磁力催化剂

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摘要

The present study focuses on the use of waste coal fly ash (CFA) for preparing magnetic photocatalyst (MnFe2O4/CFA) and its application of dye degradation from water. The MnFe2O4/CFA photocatalyst was synthesized through a facile hydrothermal method and characterized by various techniques for its structural, morphological, and photocatalytic properties. The MnFe2O4/CFA nanocomposite was used for photocatalytic degradation of methylene blue (MB) under sunlight. Detailed studies for various parameters such as pH, catalyst dose, initial dye concentration, oxidant concentration, and time on photocatalytic degradation were analyzed. The degradation efficiency reached similar to 100% under sunlight within 30 min by the MnFe2O4/CFA nanocomposite. The degradation/removal efficiency of MB was found in the order MnFe2O4/CFA (99.9%) > CFA (61%) > MnFe2O4 (56%) under optimum conditions for composite at pH = 3, composite dose 60 mg/L, and oxidant dose 0.8 mM. The MnFe2O4/CFA is a promising visible-light-active photocatalyst and can be reused several times without significant loss in photocatalytic degradation efficiency.
机译：本研究侧重于使用废煤粉煤灰（CFA）制备磁性光催化剂（MNFE2O4 / CFA）及其染料降解水的应用。通过容易水热法合成MnFe2O4 / CFA光催化剂，其特征在于其结构，形态和光催化性能的各种技术。 MnFe2O4 / CFA纳米复合材料用于阳光下亚甲基蓝（MB）的光催化降解。分析了对各种参数的详细研究，例如pH，催化剂剂量，初始染料浓度，氧化剂浓度和在光催化降解上的时间。通过MNFE2O4 / CFA纳米复合材料在30分钟内达到阳光下的降解效率与100％相似。在PH = 3的复合材料的最佳条件下，在MnFe 2 O 4 / CFA（99.9％）> CFA（61％）> MnFe2O4（56％）中发现Mb的降解/去除效率在pH = 3，复合剂剂量60mg / L和氧化剂中剂量0.8毫米。 MNFE2O4 / CFA是一个有希望的可见光活性光催化剂，可以重复使用几次，而在光催化降解效率下没有显着损失。

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