Polymer-based TiO2 nanocomposite membrane: synthesis and organic pollutant removal

IF 4.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Smart and Nano Materials Pub Date : 2021-04-03 DOI:10.1080/19475411.2021.1901792

Junya Wu, Sha Yi, Yixuan Wang, Jun Yao, Wei Gao

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引用次数: 13

Abstract

ABSTRACT Titanium dioxide (TiO2) nanoparticles are efficient photocatalysis for treating organic pollutants in water. Immobilizing TiO2 nanoparticles not only enables the reuse of nanoparticles but also prevents the harmful impact of releasing nanoparticles into the aquatic environment. In this study, a porous composite microfiber membrane based on polyacrylonitrile (PAN) with TiO2 nanoparticles has been synthesized by electrospinning technique. The new membrane system has exhibited excellent adsorptive-photocatalytic property to degrade Methylene blue (MB). Using the nonlinear form of the pseudo-first-order, pseudo-second-order, Elovich, and Intra-particle diffusion models, the adsorption mechanism was analyzed. Coupling with adsorption and photocatalysis, the efficiency of this membrane system was illustrated via the multistage linear form of the pseudo-first-order kinetic; and the electrical energy per order (EEO) confirmed the lowest energy requirements to transfer selected pollutants. Combining the results of SEM, BET, FTIR, XRD and TGA, it revealed the relationship of microstructure, composition, and MB decomposition performance. The finding presents new knowledge for material design and evaluation of polymers/oxides membrane systems for remediating organic pollutants in water. Graphical abstract

查看原文本刊更多论文

聚合物基TiO2纳米复合膜的合成及有机污染物的去除

二氧化钛纳米粒子是处理水中有机污染物的高效光催化材料。固定化TiO2纳米颗粒不仅可以实现纳米颗粒的重复利用，还可以防止纳米颗粒释放到水生环境中的有害影响。本研究采用静电纺丝技术合成了一种以聚丙烯腈(PAN)为基材的纳米TiO2多孔复合超纤维膜。该膜体系对亚甲基蓝(MB)具有良好的吸附光催化性能。采用拟一阶、拟二阶、Elovich和颗粒内扩散模型的非线性形式，分析了吸附机理。耦合吸附和光催化作用，通过准一级动力学的多级线性形式说明了该膜体系的效率;每订单电能(EEO)确认了转移选定污染物所需的最低能量。结合SEM、BET、FTIR、XRD、TGA等测试结果，揭示了其微观结构、组成与MB分解性能的关系。这一发现为修复水中有机污染物的聚合物/氧化物膜系统的材料设计和评价提供了新的知识。图形抽象

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来源期刊

International Journal of Smart and Nano Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

6.30

自引率

5.10%

发文量

审稿时长

11 weeks

期刊介绍： The central aim of International Journal of Smart and Nano Materials is to publish original results, critical reviews, technical discussion, and book reviews related to this compelling research field: smart and nano materials, and their applications. The papers published in this journal will provide cutting edge information and instructive research guidance, encouraging more scientists to make their contribution to this dynamic research field.