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首页> 外文期刊>Photochemistry and Photobiology: An International Journal >Visible light-Driven AgBr/AgCl@MIL-101(Fe) Composites For Removal of Organic Contaminant From Wastewater
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Visible light-Driven AgBr/AgCl@MIL-101(Fe) Composites For Removal of Organic Contaminant From Wastewater

机译：可见光驱动的Agbr / AgCl @ MIL-101（Fe）复合材料，用于从废水中去除有机污染物

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摘要

Microwave-solvothermal synthesized MIL-101(Fe) was successfully loaded by silver halides (AgCl and AgBr) by simple precipitation method. The XRD, FESEM mapping, XPS and DRS measurements reveal the successful fabrication of composite photocatalyst. The results suggested that silver halides altered surface charge, surface area and pore size distribution of MIL-101(Fe). The 20%AgBr@MIL-101(Fe) composite has strong tendency to remove the cationic/anionic dyes (96% of rhodamine B, 100% of malachite green and 92% of methyl orange) from wastewater after 30 min of adsorption and 90 min under visible light irradiation. The composite photocatalyst revealed the photodegradation stability up to four cycles. The formation of mesopores improves the adsorption ability of the composites for large organic molecules, while loaded silver halides might inhibit the recombination of electron-hole pairs; those were responsible for enhancing the photocatalytic degradation of organic pollutants. ESR suggested O2 center dot-, center dot OH were responsible for dye degradation in visible light by composite photocatalysts. The photocatalytic mechanism of the composite was also explained in this work.
机译：通过简单的沉淀法通过卤化银（AgCl和Agbr）成功地装载微波 - 溶剂热合成MIL-101（Fe）。 XRD，FESEM映射，XPS和DRS测量揭示了复合光催化剂的成功制造。结果表明，卤化银改变了MIL-101（Fe）的表面电荷，表面积和孔径分布。 20％AGBR @ MIL-101（Fe）复合材料具有强烈的倾向于在30分钟后从废水中除去阳离子/阴离子染料（96％的Rhodamine B，100％的麦基石绿色和92％的甲基橙）在可见光照射下最小。复合光催化剂揭示了光降解稳定性至多四个循环。中孔的形成改善了复合材料对大型有机分子的吸附能力，而装载的卤化银可能会抑制电子孔对的重组;这些负责增强有机污染物的光催化降解。 ESR建议O2中心点，中心点OH负责通过复合光催化剂可见光的染料降解。在这项工作中也解释了复合材料的光催化机理。

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