不锈钢纤维毡负载TiO_2的制备及其光催化降解染料研究  

Preparation of TiO_2 Loaded by Stainless Steel Fiber Felt and Study on Its Photo-Catalytic Degradation of Dyes

作　　者：王想[1,2] 林俊雄[1,2] 邢天玮 吴明华[1,2] 

机构地区：[1]浙江理工大学材料与纺织学院,杭州310018 [2]浙江理工大学丝绸学院,杭州310018

出　　处：《浙江理工大学学报（自然科学版）》2017年第2期214-219,共6页Journal of Zhejiang Sci-Tech University(Natural Sciences)

基　　金：国家自然科学基金项目(51203140)

摘　　要：以L316不锈钢纤维毡为载体,制备负载型纳米TiO_2光催化剂。采用罗丹明B为模拟染料进行光催化降解实验,研究负载方式、负载量、固定化温度、光照强度、染料初始浓度、染液pH值和无机盐(Na2SO4)等因素对其降解性能的影响。结果表明:粉体烧结法负载TiO_2的纤维毡光催化效果优于原位生成法;随着纤维毡上TiO_2负载量的增加,光催化活性增强,但负载量最终趋于平衡,平衡值约8mg/cm2;当固定化温度为450℃时,所制备的负载型TiO_2光催化剂活性最佳;随着紫外光照强度增加,染料初始浓度降低,染液pH值减小,染液中无机盐浓度降低,负载型纳米TiO_2光催化剂对罗丹明B的降解效果增强。Loaded nano -TiO2 photocatalyst was prepared by using L316 stainless steel fiber felt as the carrier. Rhodamine B was employed as the simulated dye to conduct the photocatalytic degradation experiments. The influences of loading method, loading dose, immobilization temperature, light intensity, initial dye concentration, pH of dye solution and inorganic salt （Na2SO4 ） and other factors on the degradation performance were studied. The results show that the photocatalytic effect of the loaded Ti02 with powder sintering method was higher than that with the in-situ loading method. The photocatalytic activity was enhanced with the increase of loading dose of TiO2 , but the loading dose finally tended to be balanced, with the equilibrium value about 8 mg/cm2. The photocatalytic activity of the loaded TiO2 was optimal when the immobilized temperature was 450℃. Moreover, the degradation effect for Rhodamine B could be enhanced with the increase of UV light intensity and the decrease of initial dye concentration, pH value and inorganic salt concentration.

关 键 词：不锈钢纤维毡 纳米TIO2 粉体烧结法 光催化 

分 类 号：TS195.644[轻工技术与工程—纺织化学与染整工程]