【作者】 刘彦东；

【导师】 王淑勤；

【作者基本信息】 华北电力大学（河北） ， 环境工程， 2010， 硕士

【摘要】 本文采用溶胶-凝胶法制备掺氮改性纳米TiO₂光催化剂,选择比表面积大,吸附能力强的活性炭纤维作为催化剂载体。并通过比表面积及孔径分析仪,TEM, XPS对制备TiO₂颗粒的的比表面积、孔径及表面元素与价态进行了检测。对纳米TiO₂光催化技术用于治理室内污染气体的影响因素、反应动力学、反应机理等进行了实验研究。实验在自行设计的光催化反应器内进行,主要考察了光强、初始浓度、催化剂用量、反应温度等对光催化氧化甲醛、二氧化硫的影响情况。结果表明:甲醛降解效率为69.3%,SO₂氧化效率为99.2%,SO₂氧化产物为SO₃,说明此反应为光催化氧化过程。在环保技术日益受到重视的今天,它必将在空气净化领域发挥重要的作用。更多还原

【Abstract】 Nitrogen-doped TiO₂ was prepared by sol-gel method,and loaded on activated carbon fibber as carrier,with large specific surface area and good sorption capacity.Specific surface area and pore size analyzer, TEM and XPS instruments were used to determine the particle’s BET, pore size, surface elements and valence.factors, reaction kinetics, reaction mechanism about nano-titanium dioxide photocatalytic technology for treating pollution indoor was studied. Experiments were carried out in the self-designed photocatalytic reactor,primarily investigated light intensity, initial concentration, catalyst dosage, reaction temperature on degradation of formaldehyde and sulfur dioxide.The photocatalytic degradation rates of the situation. The results showed that: Nano-titanium dioxide photocatalytic technology for the purification of pollutants have strong ability, the degradation products of SO₂ was SO₃ illustrate the reaction for the photocatalytic oxidation process. At present, environmental protection attracts more attention, it will play a signifcant role in the air purifing field in the future.更多还原