ZnS量子点/纤维素复合材料的制备及光催化性能  

Preparation and photocatalytic performance of ZnS quantum dots cellulose matrix composites

作　　者：周万万 王丽 李军荣[1] 钱丽颖[1] ZHOU Wan-wan;WANG Li;LI Jun-rong;QIAN Li-ying(State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室

出　　处：《应用化工》2019年第9期2021-2025,2031,共6页Applied Chemical Industry

基　　金：国家重点研发计划(2017YFB0309501)

摘　　要：采用硝酸锌和硫化钠为原料,通过水热法制备ZnS量子点的过程中同步负载于纤维素纤维上,得到具有优良性能的光催化纤维素纤维。探究了前驱体溶液浓度、水热温度、水热时间等对量子点纤维素材料的荧光强度、量子点负载率及光催化性能的影响。结果表明,最佳反应条件为:Zn2+浓度为75 mmol/L,反应温度180℃,反应时间12 h。在此条件下,ZnS量子点的负载率为9.4%。浓度10 mg/L的甲基橙(MO)模型污染物,量子点纤维素材料添加量2.5 g/L,以紫外灯(λ=365 nm)为光源,30 min内其光催化降解效率可达到83%。量子点纤维素材料具有良好的循环使用性能,经循环使用5次后,30 min内甲基橙的光催化降解率仍可达到59%。Using zinc nitrate and sodium sulfide as raw materials,the quantum dots are prepared by hydrothermal method and simultaneously loaded on cellulose fibers to obtain photocatalytic cellulose with excellent properties fiber.The effects of precursor solution concentration,hydrothermal temperature and hydrothermal time on the fluorescence intensity,quantum dot loading rate and photocatalytic performance of quantum dot cellulosic materials were investigated.The result showed that the optimal reaction conditions were as follows:Zn2+ concentration was 75 mmol/L,reaction temperature was 180 ℃,reaction time was 12 h.ZnS quantum dot loading rate is 9.4%.Methyl orange(MO) with a concentration of 10 mg/L was used as a model pollutant.The amount of quantum dot cellulose material was 2.5 g/L,the photocatalytic degradation efficiency can reach 83% within 30 min with UV lamp(λ=365 nm) as the light source.The recycling performance of quantum dot cellulosic materials was also explored.After testing,after 5 cycles of sample recycling,the photocatalytic degradation rate can still reach 59% within 30 min.

关 键 词：纤维素织物 ZnS量子点 染料 光催化降解 

分 类 号：TQ340.79[化学工程—化纤工业] TQ034