过氧改性纳米TiO_2溶胶光催化降解苯酚的研究  

Research on photocatalytic degradation of phenol by using peroxo-modified nano-TiO_2sol

作　　者：许第发[1] 周玲玲[1] 罗寄希[1] 曹盈[1] 张世英[1] 

机构地区：[1]长沙学院生物工程与环境科学系,湖南长沙410022

出　　处：《工业水处理》2014年第2期22-25,共4页Industrial Water Treatment

基　　金：国家自然科学基金项目(51272032);湖南省高校科技创新团队支持计划资助项目(湘财教指[2010]70号);湖南省教育厅一般项目(12C0467);湖南省大学生研究性学习和创新性实验计划项目(湘教通[2011]272号)

摘　　要：以硫酸氧钛（Tiosoj）为钛源，过氧化氢（H20：）为络合剂，采用低温水热法合成了过氧改性纳米TiO2溶胶。利用X射线衍射、红外光谱和透射电镜对合成产物进行了表征，并以苯酚废水为处理对象，对合成产物光催化降解苯酚的影响因素进行了考察。结果表明，合成的产物为直径约10nm、长约50nm、结晶良好、分散均匀的锐钛矿型纳米TiO2溶胶；当TiO2质量浓度为200mg／L，体系pH为4-8，苯酚初始质量浓度〈20mg/L时，在紫外光条件下反应180min，苯酚降解率可达98％。Using titanyl sulfate （TiOSO4） as titanium source,and peroxide （H202） as complex agent, preoxo-modi- fled nano-TiO2 sol has been synthesized by hydrothermal method at low temperature. The synthesized product is characterized by X-ray diffraction patterns （XRD）, fourier transform infrared spectroscopy （FT-IR）, and transmis- sion electron microscope （TEM）. Using phenol wastewater as an object to be treated, the influencing factors of the sol on the photoeatalytic degradation of phenol are investigated. The results show that the diameter and length of the synthesized product is 10 nm and 50 nm, respectively. It has a well-crystallized and evenly-distributed anatase-type structure. When TiO2 mass concentration is 200 mg/L, system pH 4-8, and initial concentration of phenol less than 20 mg/L, reaction time 180 min, the highest degradation rate of phenol reaches 98% under ultraviolet irradiation.

关 键 词：TIO2溶胶 苯酚 光催化降解 

分 类 号：X703.1[环境科学与工程—环境工程]