摘要
目的研究煅烧时间、煅烧温度、聚苯乙烯磺酸钠(PSS)投加量、溶胶体系pH值、载体投加量等因素分别对复合光催化剂多壁碳纳米管/二氧化钛(MWNTs/TiO2)光催化性能的影响,以及多因素共同作用下复合光催化剂MWNTs/TiO2的最优化制备条件,同时考察最优化复合光催化剂对氧乐果的降解效率.方法以异丙醇和钛酸四丁酯为原料,经溶胶-凝胶制备MWNTs/TiO 2复合纳米光催化剂,通过控制煅烧时间、煅烧温度、PSS投加量、溶胶体系pH值、载体投加量等制备条件进行正交实验确定最优化制备条件,同时采用表面形貌分析、X射线光谱仪(EDX)等方法对催化剂进行表征;用优化制备的MWNTs/TiO2光催化降解氧乐果,确定其降解效率.结果马弗炉600℃煅烧5.5 h,投加PSS3 g/L,所投加MWNTs质量与投加纳米TiO2质量之比为1.25%,控制溶胶体系pH值为4是最优化制备条件;优化制备的光催化剂MWNTs/TiO2反应3 h,氧乐果的降解率为40.56%.结论优化后的MWNTs/TiO2对氧乐果农药废水具有更好的降解效果.
The influences of calcining time,calcining temperature,sodium polystyrene sulfonate(PSS)dosage,sol system pH value,carrier dosage and other factors on the photocatalytic properties of the composite photocatalyst MWNTs/TiO2 were studied,and the optimal preparation conditions of the composite photocatalyst MWNTs/TiO2 under the combined action of multiple factors were studied.At the same time,the optimum photocatalyst degradation efficiency was investigated.With isopropyl alcohol and tetrabutyl titanate as raw material,through sol-gelpreparation of MWNTs/TiO2 composite nano light catalyst,by controlling the calcination time,calcination temperature,PSS dosing quantity,pH value,the sol system carrier preparation conditions such as amount of additive orthogonal experiment to determine the optimal preparation conditions,at the same time,the surface morphology analysis,X-ray spectrometer(EDX)method.The catalysts were characterized by optimization of the preparation of MWNTs/TiO 2 photocatalytic degradation of oxygen dimethoate,determine its degradation efficiency.Muffle furnace 600℃calcination of 5.5 h,adding amount of PSS 3 g/L,the sol system pH value control of 4,MWNTs dosing quantity for m(MWNTs)/m(nano TiO2)=1.25%for optimizing preparation conditions,optimizing the preparation of MWNTs/TiO2 photocatalyst reaction 3 h,oxygen dimethoate degradation rate was 40.56%.The optimized MWNTs/TiO2 had a better degradation effect on the pesticide wastewater.
作者
张伟
舒金锴
李亚峰
黎媛萍
ZHANG Wei;SHU Jinkai;LI Yafeng;LI Yuanping(School of Municipal and Environmental Engineering,Shenyang Jianzhu University,Shenyang,China,110168;School of Municipal and Mapping Engineering,Hu′nan City University,Yiyang,China,413000)
出处
《沈阳建筑大学学报（自然科学版）》
CAS
CSCD
北大核心
2020年第4期759-768,共10页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家水体污染控制与治理科技重大专项(2018ZX07601-001)
湖南省自然科学基金项目(2015JJ2022)。
