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可见光照射驱动的醋酸纤维素纳米氧化铈/铂复合垫的光催化活性

Photocatalytic Activity of Cellulose Acetate Nanoceria/Pt Hybrid Mats Driven by Visible Light Irradiation.

作者信息

Costantino Federica, Cavaliere Emanuele, Gavioli Luca, Carzino Riccardo, Leoncino Luca, Brescia Rosaria, Athanassiou Athanassia, Fragouli Despina

机构信息

Smart Materials Group, Istituto Italiano di Tecnologia (IIT), Via Morego 30, 16163 Genova, Italy.

Interdisciplinary Laboratories for Advanced Materials Physics (i-LAMP) and Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore, Via Musei 41, 25121 Brescia, Italy.

出版信息

Polymers (Basel). 2021 Mar 16;13(6):912. doi: 10.3390/polym13060912.

DOI:10.3390/polym13060912
PMID:33809649
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8002269/
Abstract

A photocatalytic system for the degradation of aqueous organic pollutants under visible light irradiation is obtained by an innovative approach based on ceria/platinum (Pt) hybrid nanoclusters on cellulose acetate fibrous membranes. The catalytic materials are fabricated by supersonic beam deposition of Pt nanoclusters directly on the surface of electrospun cellulose acetate fibrous mats, pre-loaded with a cerium salt precursor that is transformed into ceria nanoparticles directly in the solid mats by a simple thermal treatment. The presence of Pt enhances the oxygen vacancies on the surface of the formed ceria nanoparticles and reduces their band gap, resulting in a significant improvement of the photocatalytic performance of the composite mats under visible light irradiation. Upon the appropriate pretreatment and visible light irradiation, we prove that the most efficient mats, with both ceria nanoparticles and Pt nanoclusters, present a degradation efficiency of methylene blue of 70% and a photodegradation rate improved by about five times compared to the ceria loaded samples, without Pt. The present results bring a significant improvement of the photocatalytic performance of polymeric nanocomposite fibrous systems under visible light irradiation, for efficient wastewater treatment applications.

摘要

一种用于在可见光照射下降解水中有机污染物的光催化系统，是通过一种基于醋酸纤维素纤维膜上的二氧化铈/铂（Pt）混合纳米团簇的创新方法获得的。催化材料是通过将Pt纳米团簇超声束沉积直接在电纺醋酸纤维素纤维垫的表面上制备的，该纤维垫预先负载有铈盐前驱体，通过简单的热处理在固体垫中直接转化为二氧化铈纳米颗粒。Pt的存在增强了所形成的二氧化铈纳米颗粒表面的氧空位并减小了它们的带隙，导致复合垫在可见光照射下的光催化性能有显著提高。经过适当的预处理和可见光照射后，我们证明，同时含有二氧化铈纳米颗粒和Pt纳米团簇的最有效垫，亚甲基蓝的降解效率为70%，与不含Pt的负载二氧化铈的样品相比，光降解速率提高了约五倍。目前的结果显著提高了聚合物纳米复合纤维系统在可见光照射下的光催化性能，可用于高效废水处理应用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a0b/8002269/740fc84b9808/polymers-13-00912-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a0b/8002269/df44df6c0039/polymers-13-00912-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a0b/8002269/c4eb20d73359/polymers-13-00912-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a0b/8002269/d1c61509d9b4/polymers-13-00912-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a0b/8002269/2fbb85f36010/polymers-13-00912-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a0b/8002269/42bfb1cc54ea/polymers-13-00912-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a0b/8002269/82b19df50765/polymers-13-00912-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a0b/8002269/61b612b2ecb8/polymers-13-00912-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a0b/8002269/78dc669b1cff/polymers-13-00912-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a0b/8002269/740fc84b9808/polymers-13-00912-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a0b/8002269/df44df6c0039/polymers-13-00912-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a0b/8002269/c4eb20d73359/polymers-13-00912-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a0b/8002269/d1c61509d9b4/polymers-13-00912-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a0b/8002269/2fbb85f36010/polymers-13-00912-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a0b/8002269/42bfb1cc54ea/polymers-13-00912-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a0b/8002269/82b19df50765/polymers-13-00912-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a0b/8002269/61b612b2ecb8/polymers-13-00912-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a0b/8002269/78dc669b1cff/polymers-13-00912-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9a0b/8002269/740fc84b9808/polymers-13-00912-g009.jpg

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