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Photocatalytic degradation of pesticides by nanofibrous membranes fabricated by colloid-electrospinning

机译:通过胶体静电纺丝制造的纳米纤维膜的光催化降解农药

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摘要

Photocatalytic degradation of organic pollutants is a promising way to clean wastewater. Herein, we develop and compare two processes for fabricating nanofibrous membranes with photocatalytic properties. Hybrid nanofibers are produced by colloid-electrospinning and composed of metal oxide nanoparticles on sintered SiO2 nanoparticles. The latter serves as support for the photocatalyst and preserves the structural integrity of nanofibers. Adsorption of metal salts on crosslinked polymer/SiO2 fibers followed by calcination allows for the obtention of fibers with large amounts of metal oxide. Nanofibrous membranes with supported ZnO, In2O3, or mixture of both, display photocatalytic activity upon UV irradiation. The membranes can degrade a dye and an organophosphate pesticide more effectively than membranes directly fabricated from the calcination of metal oxides.
机译:有机污染物的光催化降解是清洁废水的有希望的方式。 在此,我们开发和比较两种用光催化性能制造纳米纤维膜的方法。 杂化纳米纤维通过胶体静电纺丝制备并由烧结SiO2纳米颗粒上的金属氧化物纳米颗粒组成。 后者用作对光催化剂的支持,并保留纳米纤维的结构完整性。 在交联聚合物/ SiO2纤维上的吸附金属盐,然后进行煅烧允许通过大量金属氧化物的纤维获得。 纳米纤维膜用负载的ZnO,In2O3或两者的混合物,在UV辐射上显示光催化活性。 膜可以比由金属氧化物煅烧直接制造的膜更有效地降解染料和有机磷酸盐农药。

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