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电气石复合Nd/TiO_2材料光催化活性研究 被引量:5
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作者 袁昌来 董发勤 《矿物学报》 CAS CSCD 北大核心 2006年第2期233-237,共5页
以硝酸钕、天然矿物电气石和钛酸丁酯为原料,采用凝胶法制备了电气石复合Nd/TiO2和钕掺杂TiO2。用XRD、UV-VIS、ESR对电气石复合Nd/TiO2材料进行了表征;以苯酚为目标降解物,考察了电气石复合Nd/TiO2材料的光催化活性。结果发现TiO... 以硝酸钕、天然矿物电气石和钛酸丁酯为原料,采用凝胶法制备了电气石复合Nd/TiO2和钕掺杂TiO2。用XRD、UV-VIS、ESR对电气石复合Nd/TiO2材料进行了表征;以苯酚为目标降解物,考察了电气石复合Nd/TiO2材料的光催化活性。结果发现TiO2的相变转化区间在600—750℃范围内;电气石掺入对Nd/TiO2材料的光吸收范围基本没有影响,在300—750℃范围煅烧后,随温度升高UV-VIS图谱有逐渐红移现象;电气石的加入使得Nd/TiO2材料在光照及未光照条件下都起到增强·OH强度的作用;在Nd/TiO2材料中掺入0.6%的电气石获得最好的光催化活性,600℃下煅烧光催化效果较优。 展开更多
关键词 电气石 钕/二氧化钛 复合材料 光催化活性
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Preparation and photocatalytic activity of neodymium doping titania loaded to silicon dioxide
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作者 杨学灵 朱丽 +2 位作者 杨乐敏 周武艺 徐悦华 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第2期335-339,共5页
Neodymium doping titania was loaded to silicon dioxide to prepare Nd/TiO2-SiO2 by sol-gel method and Nd/TiO2-SiO2 was characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM), Fourier transf... Neodymium doping titania was loaded to silicon dioxide to prepare Nd/TiO2-SiO2 by sol-gel method and Nd/TiO2-SiO2 was characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM), Fourier transform-infrared spectroscopy (FT-IR) and diffuse reflectance spectra (DRS). Photocatalytic activities of Nd/TiO2-SiO2 with different neodymium contents were evaluated by degradation of methyl orange. The light absorption of Nd/TiO2-SiO2 increased with increasing doping neodymium in a visible light range of 388-619 nm, and Nd doping was in favor of decreasing the recombination of photo-generated electrons with holes. Nd and SiO2 improved the photocatalytic activity of TiO2. The optimal molar fraction of Nd to Ti was 0.1%, and the optimum calcination temperature was 600 ℃. The highest degradation rate of methyl orange was 82.9% after irradiation for 1 h. 展开更多
关键词 TITANIA silicon dioxide neodymium doping PHOTOCATALYSIS sol-gel method
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