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Flower-like MoS2/BiFeO3 doped silver orthophosphate catalyst for visible-light assisted treatment of refractory organic pollutants
Applied Materials Today ( IF 7.2 ) Pub Date : 2020-10-12 , DOI: 10.1016/j.apmt.2020.100845
Thomas Abraham , Ragam N. Priyanka , Subi Joseph , Neena John Plathanam , Gigimol M.G. , Beena Mathew

The development of MoS2/BiFeO3 embedded silver orthophosphate ternary composite for the excellent photocatalytic abatement of refractory pollutants was established. The fabrication of a confounded heterojunction photocatalyst composite for the enhanced treatment of various dyes, pesticides and antibiotic drugs with extra stability and observable reproducibility are possible. The acid dye methyl orange, basic dyes such as methylene blue, rhodamine B and an azo dye acid red 18 were successfully degraded with above 90% degradation efficiency within a very short time period. These results highlighted that the degradation efficiency of the developed composite was 8 times higher than the pure Ag3PO4 catalyst. Also, the hazardous herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) was degraded and mineralized within 180 min, the most toxic insecticide acephate was degraded within 60 min and the antibiotic tetracycline was removed in 120 min with accountable mineralization. All the pesticides and antibiotic formed less toxic degraded products and the products were corroborated with high resolution mass spectrum (HRMS). The radical scavenger experiment reveals that the active species for photodegradation study was photogenerated holes. These are produced by the rapid transfer of electrons through Ag3PO4 due to its low recombination tendency. In short, the development of Ag3PO4 based ternary composite for the better visible light assisted catalytic degradation of refractory pollutants such as dyes, pesticides and pharmaceutical drugs were carried out with excellent efficiency.



中文翻译:

花状MoS 2 / BiFeO 3掺杂的正磷酸银催化剂,用于可见光辅助处理难处理的有机污染物

建立了MoS 2 / BiFeO 3包埋的正磷酸银三元复合材料的开发,该复合材料具有优异的催化降解难处理污染物的性能。可以制造混杂的异质结光催化剂复合材料,以增强处理各种染料,农药和抗生素药物的稳定性和可观察性,从而提高其稳定性。酸性染料甲基橙,碱性染料如亚甲基蓝,若丹明B和偶氮染料酸性红18在很短的时间内就可以成功降解,降解效率高达90%以上。这些结果表明,开发的复合材料的降解效率比纯Ag 3 PO 4高8倍。催化剂。同样,危险的除草剂2,4-二氯苯氧基乙酸(2,4-D)在180分钟内被降解和矿化,毒性最高的杀虫剂乙酰甲酸盐在60分钟内被降解,抗生素四环素在120分钟内被去除并具有可观的矿化作用。所有的农药和抗生素均形成毒性较低的降解产物,并通过高分辨率质谱(HRMS)证实了该产物。自由基清除剂实验表明,用于光降解研究的活性物质是光生空穴。这些是由于电子的低复合趋势而通过Ag 3 PO 4迅速转移而产生的。简而言之,Ag 3 PO 4的发展 以更好的可见光为基础的三元复合材料,以优异的效率进行了难降解污染物如染料,农药和药物的催化降解。

更新日期:2020-10-12
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