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首页> 外文期刊>Chemistry: A European journal >Photooxidative Degradation of Dye Pollutants Accumulated in Self-Assembled Natural Polyelectrolyte Microshells under Visible Radiation
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Photooxidative Degradation of Dye Pollutants Accumulated in Self-Assembled Natural Polyelectrolyte Microshells under Visible Radiation

机译：自组装天然聚电解质微壳在可见光下积累的染料污染物的光氧化降解

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摘要

A novel route to facilitate the degradation of dye pollutants,a class of well-known recalcitrant organic pollutants,is reported.This new approach is based on a natural polyelectrolyte microshell that was preformed by the alternate adsorption of the anionic alginate sodium(ALG)and the cationic chitosan(CHI)onto weakly cross-linked melamine formaldehyde(MF)colloidal particles,and the subsequent sacrifice of MF templates in 0.1M HCl.The as-prepared microshells could accumulate rhodamine B(RhB)and fluorescein(Flu)efficiently in water under ordinary conditions by means of a simple mixing process.The photodegradation of the accumulated RhB and Flu was examined in the presence of Fe~(3+)and H_2O_2 under visible radiation.The accumulated RhB and Flu are rapidly degraded and the assembled shells maintain their intact spherical shape throughout the photoreaction process.Results of recycling degradation experiments and the photochemical behavior of the shells,as demonstrated by confocal laser scanning microscopy(CLSM),UV-visible spectroscopy,and scanning force microscopy(SFM),further suggest that the constructed shells may be used as environmentally friendly microcontain-ers for the elimination of dyes in wastewater.
机译：据报道，一种新型的促进染料污染物降解的途径是一类众所周知的难降解有机污染物。这种新方法基于天然聚电解质微壳，该壳是通过阴离子藻酸盐和铝的交替吸附而形成的。阳离子壳聚糖在弱交联的三聚氰胺甲醛（MF）胶体颗粒上的沉淀，随后在0.1M HCl中牺牲了MF模板。制备的微壳可以在其中高效地积累若丹明B（RhB）和荧光素（Flu）在普通条件下，通过简单的混合过程将水溶解。在可见光下，在Fe〜（3+）和H_2O_2存在的条件下检查累积的RhB和Flu的光降解。累积的RhB和Flu迅速降解并组装了壳通过共聚焦激光sca证明了回收降解实验和壳的光化学行为的结果是在整个光反应过程中保持其完整的球形。宁氏显微镜（CLSM），紫外可见光谱和扫描力显微镜（SFM）进一步表明，所构建的壳可以用作环境友好的微容器，用于消除废水中的染料。

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