摘要
光催化作为新兴的水处理技术,符合绿色、循环、低碳的发展理念,但其对低浓度污染物的选择性较差,而且传统的TiO_(2)光催化剂回收相对困难。结合大分子自组装技术、光催化技术与分子印迹技术,在玻璃纤维表面修饰具有黏附性的光催化分子印迹复合纳米粒子,构筑了集特异性分子富集与高效光催化降解于一体的多功能玻璃纤维,实现了对低浓度有机污染物对硝基苯酚(PNP)的高选择性催化降解。此外,复合纳米粒子的良好的黏附性也极大地提高了光催化剂的循环稳定性。制备的对硝基苯酚@二氧化钛/双亲性无规聚合物复合纳米粒子(PNP@TiO_(2)/PAVD NPs)为直径50 nm左右的不规则球状,将其修饰在玻璃纤维表面后对PNP的去除率高达97.57%,且对PNP的催化降解有良好的选择性。本研究不仅实现了对目标水污染物的高效富集与降解,还为光催化剂的分离及回收提供了一种简便的方法。
As an emerging water treatment technology,photocatalysis conforms to the development concepts of green,circular and low-carbon.However,it has poor selectivity for low-concentration pollutants,and the recovery of traditional TiO_(2)photocatalysts is relatively difficult.By combining macromolecular self-assembly technology,photocatalysis and molecular imprinting technology,photocatalytic molecularly imprinted composite nanoparticles with adhesive properties were modified on the surface of glass fibers.These multifunctional glass fibers integrated specific molecular enrichment and efficient photocatalytic degradation,achieving highly selective catalytic degradation of low-concentration organic pollutant pnitrophenol(PNP).Moreover,the good adhesion of the composite nanoparticles also greatly improved the cyclic stability of the photocatalyst.The prepared p-nitrophenol@titanium dioxide/polymer composite nanoparticles(PNP@TiO_(2)/PAVD NPs)had an irregular spherical shape with a diameter of approximately 50 nm,and the removal rate of PNP reached as high as 97.57%,indicating good selectivity for the catalytic degradation of PNP.Our research not only realized the efficient enrichment and degradation of target water pollutants,but also provided a convenient method for the separation and recovery of photocatalysts.
作者
朱刘燕
邓光宇
张睿媛
聂翔宇
张荣莉
ZHU Liuyan;DENG Guangyu;ZHANG Ruiyuan;NIE Xiangyu;ZHANG Rongli(School of Chemical and Environmental Engineering,Anhui Polytechnic University,Wuhu 241000,Anhui,China)
出处
《功能高分子学报》
北大核心
2025年第3期271-278,共8页
Journal of Functional Polymers
基金
安徽省自然科学基金(2108085 ME154)
芜湖市科技项目(2023 jyjxggyjY159)。
关键词
光催化降解
分子印迹
功能化玻璃纤维
大分子自组装
特异性富集
photocatalytic degradation
molecular imprinting
functionalized glass fiber
macromolecular self-assembly
specific enrichment
