摘要
用热氧化法制备了TiO2/Ti薄膜电极,并用XRD和AFM对TiO2/Ti薄膜电极的晶形和表面形貌进行了表征。结果表明:热氧化法制备的TiO2主要为锐钛型纳米颗粒,直径在40 nm左右。设计了一种新型双槽光电化学反应器,用于废水的处理。以热氧化法制备的TiO2/Ti薄膜电极为阳极进行光电催化反应,同时以石墨电极为阴极用于产生双氧水,并与紫外光组成UV/H2O2体系。考察了双槽反应器中活性艳红X-3B在不同条件下的降解效果。降解结果表明:在新型反应器的阴阳两极槽中,活性艳红不仅在TiO2/Ti阳极槽中被降解,而且在石墨阴极槽中也得到降解;活性艳红在酸性条件下的降解效果最好;相对于单纯的电化学氧化和光催化,光电化学协同作用对X-3B的降解效果最好。
A TiO2/Ti thin membrane electrode was made by thermal oxidation method.The crystal structure and surface morphology of the thermal oxidized TiO2/Ti electrode were characterized by X-ray diffraction（XRD） and Atomic Force Microscope（AFM）.The analytical results showed that n-type anatase nanoparticles with a diameter of nealy 40 nm was formed.An innovative two-compartment photoelectric oxidation reactor was successfully developed for wastewater treatment.The TiO2/Ti thin membrane electrode was applied in this reactor as the anode to conduct photoelectrocatalytic oxidation,and a graphite electrode was used as the cathode to electrogenerate hydrogen peroxide which can constitute UV/H2O2 system with UV light simultaneously.Degradation of Reactive brilliant red（X-3B） was performed under various experimental conditions.The degradation experiment results showed in the innovative two-compartment photoelectric oxidation reactor,the X-3B not only can be decolorized in TiO2/Ti anode compartment,but also in graphite cathode compartment;the X-3B degradation efficiency in the two compartments achieved the highest at acidic condition;comparing to the electrooxidation and photooxidation in both TiO2/Ti anode compartment and graphite cathode compartment,the degradation efficiency of photo-electro-chemical catalysis was the best.
出处
《生态环境学报》
CSCD
北大核心
2010年第10期2474-2478,共5页
Ecology and Environmental Sciences
基金
国家自然科学基金项目(20676050)
广东省自然科学基金项目(8451063201001261)
广东高校优秀青年创新人才培育项目(LYM08022)
暨南大学自然基金项目(5122000251208028)
关键词
二氧化钛
光电催化
活性艳红X-3B
双槽
Titanium dioxide
photoelectrocatalysis
reactive brilliant red X-3B
two-compartment
