摘要
以竹炭作为纳米二氧化钛(TiO2)粒子的载体物质,制备了二氧化钛/竹炭复合材料,并以苯酚为模型物质,对其光催化性能进行了研究。研究表明,此复合材料对苯酚具有较强的吸附性能,其中吸附平衡常数Ka为0.0077L·mg-1,Ka与苯酶吸咐平衡质量浓度ρe的乘积为0.25～1.35,二氧化钛/竹炭复合体的吸附作用不能忽略。根据L-H(Langmuir-Hinshelwood)方程积分所得分数级动力学方程较一级动力学方程能更好地描述其光催化降解规律,相应的光催化降解动力学方程为lnρ-0.0077ρ=6.58-0.00239t(ρ为苯酚质量浓度,t为光照时间)。
TiO2/bamboo charcoal composite was prepared by loading TiO2 into bamboo charcoal. The photo- catalytic activity of TiO2/bamboo charcoal composite experimental results demonstrated that TiO2/bamboo was evaluated using phenol as a model substrate. The charcoal composite had good adsorption capacity. The adsorption equilibrium constant （Ka） was 0.007 7 L·mg-1, centration of phenol） was from 0.25 to 1.35. It was found Kapo （Pe referred to equilibrium adsorption con- that the Langmuir-Hinshelwood model in its intesubstrate adsorption on the catalysts was not negligible, the corresponding photocatalytic degradation reaction equation was： lnp - 0.007 7p = 6.58 - 0.002 39t （p referred to phenol concentration, and t referred to adsorption time）. [Ch, 6 fig. 14 ref.]
出处
《浙江林学院学报》
CSCD
北大核心
2010年第2期205-209,共5页
Journal of Zhejiang Forestry College
基金
"十一五"国家科技支撑计划项目(2006BAD19B0505)
江苏省科学技术攻关项目(BE2006348)
关键词
林业工程
竹炭
纳米改性竹炭
苯酚
光催化
forest engineering
bamboo charcoal
bamboo charcoal modified by nano-TiO2
phenol
photo-catalyze
