摘要
为了获得具有高光催化活性和稳定性的TiO2薄膜,采用浸渍涂布法不加黏结剂将Deguessa P-25TiO2固定在泡沫镍基片上,制备成泡沫镍基负载TiO2薄膜,并以Ti-10薄膜为光催化组件制备了一种新型连续流内循环光催化反应器。表征结果显示:P-25薄膜呈混晶相,增大负载浓度会增加基片上结晶质(如锐钛矿相(101))数量、团聚颗粒数量、表面微裂痕以及比表面积;高温煅烧下泡沫镍基片上Ni元素以金属Ni和NiO形式扩散到薄膜表面,形成NiO-Ni体系,有助于提高薄膜的光催化活性;当负载P-25质量分数为10%时,薄膜表层Ni原子比为12.29%,此时薄膜具有最佳光催化活性。以Ti-10样品为光催化薄膜组件制备了一种连续流光催化反应装置,该装置降解化工废水的实验结果显示反应装置连续运行一周,出水可达到一级排放标准。
Deguessa P - 25 films were immobilized on foam nickel substrate by a facile dip coating route without any binder. The structural properties of the films were examined by using X ray diffraction （XRD）, scanning electron microscopy （SEM） and other methods. It found that the increase of the P- 25 loading in the sols led to the increment of the crystalline material （a. m. anatase （101））, agglomerates, microeracks and the specific surface area. Moreover, XPS analysis result showed that Ni element diffused from the porous nickel during calcinations can form a mixture of Ni and NiO combined on the films surface, which could restrain the recombination of electron-hole pairs, result in theenhancement of the photocatalytic activity. Ti - 10 film prepared in 10% ethanol sol presents the optimum photocatalytic activity, wherein the Ni content detected by EDS analysis on the film surface is 12.29%. In order to further investigate stability and practicality, Ti - 10 film was made into a newly designed three-dimensional photocatalytic reactor for the treatment of real chemical wastewater. Chemical wastewater is pretreated by slowly quartz sand filter in order to remove suspended matter and solid particles, and then flow directly into the three-dimensional photocatalytic reactor. This reactor has been running for one week, and the chemical oxygen demand of effluent can reach the first grade of national environmental standard.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2012年第4期1151-1158,共8页
Journal of Jilin University：Earth Science Edition
基金
国家自然科学基金项目(51008056
51108069)
国家水体污染控制与治理科技重大专项(2009ZX07424)
教育部高等学校博士点基金项目(20100043110009)
吉林省社会发展基金项目(20086035
20110102)
关键词
光催化
泡沫镍
二氧化钛
喹啉
废水处理
光催化反应器
photocatalysis
foam nickel
TiOe
quinoline
wastewater treatment
photocatlyticreactor
