电气石对纳米二氧化钛结构及光催化性能的影响

以电气石粉为载体,TiCl4为前驱体,采用水解沉淀法在电气石表面负载纳米TiO2,制备纳米TiO2/电气石复合材料。通过X射线衍射仪、场发射扫描电子显微镜、能谱仪及光电子能谱仪对样品进行表征,以甲醛为目标降解物,考察电气石对纳米TiO2光催化性能的影响。结果表明：纳米TiO2负载在电气石表面后,其结构和性能发生了明显变化。经550℃煅烧,锐钛矿型的纳米TiO2晶粒由15.6nm降为9.3nm。TiO2/电气石复合材料中的O1s、Ti2p1/2和Ti2p3/2结合能比纯TiO2分别提高了1.35eV、1.32eV和1.27eV,而O1s和Si2p的结合能比电气石中分别降低了1.80eV和0.13...

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Bibliographic Details
Published in硅酸盐学报 Vol. 42; no. 7; pp. 920 - 925
Main Author 高如琴 吴洁琰 郝丹迪 朱灵峰 赵晨
Format Journal Article
LanguageChinese
Published 2014
Subjects
光催化性能
复合材料
电气石
纳米二氧化钛
结构
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Summary:以电气石粉为载体,TiCl4为前驱体,采用水解沉淀法在电气石表面负载纳米TiO2,制备纳米TiO2/电气石复合材料。通过X射线衍射仪、场发射扫描电子显微镜、能谱仪及光电子能谱仪对样品进行表征,以甲醛为目标降解物,考察电气石对纳米TiO2光催化性能的影响。结果表明：纳米TiO2负载在电气石表面后,其结构和性能发生了明显变化。经550℃煅烧,锐钛矿型的纳米TiO2晶粒由15.6nm降为9.3nm。TiO2/电气石复合材料中的O1s、Ti2p1/2和Ti2p3/2结合能比纯TiO2分别提高了1.35eV、1.32eV和1.27eV,而O1s和Si2p的结合能比电气石中分别降低了1.80eV和0.13eV。TiO2和TiO2/电气石复合材料在紫外灯下照射300min,甲醛去除率分别为73.3%和91.6%。
Bibliography:GAO Ruqin , WU J ieyan , HAO Dandi , ZHU Ling f eng , ZHAO Chen （School of Environment and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450011, China）
tourmaline; nano-titanium dioxide; composites; structure; photocatalytic activity
11-2310/TQ
TiO2 nanoparticles were loaded on tourmaline with titanium tetrachloride as a precursor by a chemical liquid deposi- tion method to prepare TiO2 nanoparticles/tourmaline composites. The structure of the synthesized samples was characterized by X-ray diffraction, field emission scanning electron microscopy, energy dispersive spectroscopy and X-ray photoelectron spec- troscopy, respectively. The photocatalytic activity of the samples was investigated v/a the degradation of formaldehyde. The results indicate that the structure of TiO~ nanoparticles loaded on the surface of tourmaline changes obviously, and the main crystalline phase of TiCh nanoparticles calcined at 550 ~C is anatase with the average particle size of 9.3-15.6
ISSN:0454-5648