Luo Yongyi, Zhai Fuqiang, Zhang Yingchun, Chen Zhiqian, Ding Mingde, Qin Dajiang, Yang Jinming, Feng Guang, Li Lu
School of Materials and Energy, Southwest University, Chongqing 402160, People's Republic of China.
Micro/Nano Optoelectronic Materials and Devices International Science and Technology Cooperation Base of China, Chongqing University of Arts and Sciences, Chongqing 402160, People's Republic of China.
R Soc Open Sci. 2021 Aug 18;8(8):202285. doi: 10.1098/rsos.202285. eCollection 2021 Aug.
The development of high-performance air filter has become more and more important to public health. However, it has always been very challenging for developing a multifunctional air filter to simultaneously achieve excellent filtration and antibacterial properties. Herein, a versatile air filter was prepared with loading the reduced graphene (rGO) and zinc oxide on the superfine glass fibre (s-GF) with the three-dimensional network structure by sol-gel process followed by calcination, which aims to achieve synergistic high-efficiency air filtration and rapid response to photocatalytic antibacterial properties under visible light. The air filter showed a three-dimensional network structure based on a rGO/ZnO/s-GF multilayer and exhibited the highest catalytic performance by achieving a 95% degradation effect on rhodamine B within 2 h and achieving 100% antibacterial inactivation of the and within 4 h under visible light when the weight ratio of rGO in rGO/ZnO is 1.6%. The air filtration efficiency can also be maintained at 99% after loading ZnO and rGO photocatalytic particles. The spectrum of the photoluminescence (PL), UV-Vis diffuse reflectance spectra (DRS) and electron spin resonance (ESR) indicate that the combination of rGO and ZnO on the s-GF can increase the separation of photogenerated carriers and the specific surface area of the air filter, thereby increasing the photocatalytic response and antibacterial properties of the s-GF air filter under visible light in a short time.
高性能空气过滤器的发展对公众健康变得越来越重要。然而，开发一种多功能空气过滤器以同时实现优异的过滤和抗菌性能一直极具挑战性。在此，通过溶胶 - 凝胶法然后煅烧，在具有三维网络结构的超细玻璃纤维（s - GF）上负载还原氧化石墨烯（rGO）和氧化锌，制备了一种多功能空气过滤器，旨在实现协同高效空气过滤以及在可见光下对光催化抗菌性能的快速响应。该空气过滤器呈现基于rGO/ZnO/s - GF多层的三维网络结构，当rGO/ZnO中rGO的重量比为1.6%时，在可见光下对罗丹明B在2小时内实现95%的降解效果，并在4小时内对大肠杆菌和金黄色葡萄球菌实现100%的抗菌失活，表现出最高的催化性能。在负载ZnO和rGO光催化颗粒后，空气过滤效率也可保持在99%。光致发光（PL）光谱、紫外 - 可见漫反射光谱（DRS）和电子自旋共振（ESR）表明，rGO和ZnO在s - GF上的结合可以增加光生载流子的分离以及空气过滤器的比表面积，从而在短时间内提高s - GF空气过滤器在可见光下的光催化响应和抗菌性能。
