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Cuttlefish bone stabilized Ag3VO4 nanocomposite and its Y2O3-decorated form: Waste-to-value development of efficiently ecofriendly visible-light-photoactive and biocidal agents for dyeing, bacterial and larvae depollution of Egypt's wastewater
Journal of Photochemistry and Photobiology A: Chemistry ( IF 4.1 ) Pub Date : 2020-07-12 , DOI: 10.1016/j.jphotochem.2020.112749
Atef S. Darwish , Mostafa A. Sayed , Ahmed Shebl

Cuttlefish bone (CFB) successfully stabilizes highly-negatively charged hollow α-Ag3VO4 nanospheres (19 nm) over its aragonite-layers, and sequentially subjects for decoration with yttria (Y) quantum dot-like particles (QDs). Carmine indigo (CI) dye, Escherichia Coli bacteria and Culex pipiens larvae are chosen as urgent-target pollutants in Egypt's wastewater. Such nanocomposites are examined as photocatalysts for CI degradation, bactericides and larvicides. Ag3VO4/CFB exhibits highly-sounded photocatalytic efficiency (∼97 %) of 1.5 times higher than Y@Ag3VO4/CFB with turning of light-irradiation from UV- to green-light level. Such visible-light-driven photocatalyst generates plenty of electron-hole pairs of developed separation efficiency and transference, governing direct hole oxidation pathway for CI (∼95 % mineralization) with efficient consecutive 6 cycles. Y@Ag3VO4/CFB is seeded as topgallant eco-friendly biocide displaying efficiencies near 100 %. Such lethal effect regards to firm-binding of decorated-yttria QDs to aragonite-layers, encouraging formation of large-sized silver vanadates (70 nm) allowing biological activity of vanadate ions to potentially contribute in the bio-killing act.



中文翻译:

墨鱼骨稳定的Ag 3 VO 4纳米复合材料及其Y 2 O 3装饰形式:高效利用价值的环保型可见光光敏剂和杀生物剂的废物价值开发,用于埃及废水的染色,细菌和幼虫污染

乌贼骨(CFB)成功地稳定高负电荷的中空α银3 VO 4纳米球(19纳米)在其霰石的层,并依次受试者装饰用氧化钇(Y)的量子点样颗粒(量子点)。胭脂红(CI)染料,大肠埃希氏菌和淡色库蚊幼虫被选为埃及废水中的紧急目标污染物。研究了这种纳米复合材料作为CI降解的光催化剂,杀菌剂和杀幼虫剂。Ag 3 VO 4 / CFB具有很高的光催化效率(约97%),是Y @ Ag 3 VO 4的1.5倍/ CFB,将光辐射从UV转换为绿色。这种可见光驱动的光催化剂可产生大量的电子-空穴对,这些电子-空穴对具有很高的分离效率和转移性,可有效连续连续6个循环控制CI(〜95%矿化)的直接空穴氧化途径。Y @ Ag 3 VO 4 / CFB的种子是顶级的环保型杀菌剂,显示出接近100%的效率。这种致命作用涉及修饰的氧化钇量子点与文石层的牢固结合,从而鼓励形成大型钒酸银(70 nm),使钒酸根离子的生物活性可能有助于生物杀灭作用。

更新日期:2020-07-12
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