引用本文:
冯彩霞, 王岩, 金振声, 张顺利. N掺杂纳米TiO2可见光催化氧化丙烯的动力学行为[J]. 物理化学学报,
2008, 24(04): 633-638.
doi:
10.3866/PKU.WHXB20080415
Citation: FENG Cai-Xia, WANG Yan, JIN Zhen-Sheng, ZHANG Shun-Li. Kinetic Behavior of Visible Light Photocatalytic Oxidation of Propylene for N-Doped Nano-TiO2[J]. Acta Physico-Chimica Sinica, 2008, 24(04): 633-638. doi: 10.3866/PKU.WHXB20080415
Citation: FENG Cai-Xia, WANG Yan, JIN Zhen-Sheng, ZHANG Shun-Li. Kinetic Behavior of Visible Light Photocatalytic Oxidation of Propylene for N-Doped Nano-TiO2[J]. Acta Physico-Chimica Sinica, 2008, 24(04): 633-638. doi: 10.3866/PKU.WHXB20080415
N掺杂纳米TiO2可见光催化氧化丙烯的动力学行为
摘要:
通过在不同温度的氨气气氛中处理纳米管钛酸(NTA)制得具有可见光响应的氮掺杂纳米二氧化钛. X射线衍射(XRD)谱表征结果显示, 当温度高于400 ℃时, 样品由正交晶系向锐钛矿相转变, 700 ℃处理得到的样品除了锐钛矿相TiO2外还有TiN 新相存在; 紫外-可见扩散漫反射(DRS)结果表明, 氮掺杂纳米TiO2在整个可见光区都有明显的吸收. 不同波长可见光及不同气体流速的光催化氧化丙烯动力学研究表明, 活性最好的N掺杂纳米TiO2催化剂(600 ℃ NH3处理)对可见光的利用范围可扩展至500 nm, 低浓度丙烯光催化氧化反应为一级反应.
English
Kinetic Behavior of Visible Light Photocatalytic Oxidation of Propylene for N-Doped Nano-TiO2
Abstract:
N-doped TiO2 (anatase) with high visible light photocatalytic activity was prepared by treating nanotube titanic acid (NTA) in NH3 flowat different temperatures. The crystalline structure of N-doped TiO2 determined by XRD was anatase when the treating temperature was higher than 400 ℃, however, a newphase (TiN) emerged at 700 ℃. The UV-Vis diffuse reflectance spectra (DRS) display that N-doped TiO2 has a continuous absorption at λ=400 nm. The photocatalytic activity of the N-doped TiO2 was determined by the photocatalytic oxidation of propylene under visible light irradiation. The highest photocatalytic activity was obtained for the catalyst treated at 600 ℃ in NH3 flow, which was active even under λ=500 nm, its kinetic behavior was accordant with the first order reaction formula.
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