微纳复合光催化纤维的制备及其性能研究

Preparation and Properties of Micro-nano Composite Photocatalytic Fibers

以具有较好力学性能的微纳复合纤维为载体,通过喷涂法分别将硅溶胶和二氧化钛均匀负载于纤维表面,制备具有高效光催化活性的光催化纤维。研究了不同硅溶胶质量分数和催化剂质量分数对材料整体形貌的影响,以极性有机污染物罗丹明B(Rhodamine B, RhB)与卡马西平(Carbamazepine, CBZ)和非极性有机污染物甲苯为底物,探究了光催化纤维的催化活性和循环使用性能。结果表明:该光催化纤维能有效降解上述有机污染物,去除率均能达到90%以上,其中对CBZ去除率达到99.6%;另外,经过10次循环测试后,光催化纤维对RhB去除效果基本未变,说明硅溶胶的引入实现了纤维与催化剂之间牢固结合。该方法操作简单可控性强,可有效地应用于催化纤维的制备。

The photocatalytic fibers with high photocatalytic activity were prepared by spraying silica sol and titanium dioxide on the surface of the micro-nanocomposite fibers with good mechanical properties.The effects of different silica sol concentration and catalyst concentration on the overall morphology of the materialwere studied.The polar organic pollutant Rhodamine B(RhB)and antibiotic Carbamazepine(CBZ)as well as the non-polar organic pollutant toluene were used as substrates to explore the photocatalytic activity and recycling performance of photocatalytic fiber.The experimental results show that the photocatalytic fiber could effectively degrade the above organic pollutants,with the removal rate of more than 90%,and the removal rate of CBZ could reach 99.6%.In addition,the RhB removal efficiency remained unchanged after 10 cycles of tests,indicating that the introduction of silica sol achieves a firm combination between fibers and the catalyst.This method is simple and controllable,and can be applied to prepare catalytic fibers effectively.