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Ni_(1.5)Ti_5NbO_(14)光催化剂的结构特征及性质 被引量：1

Study on structure and photocatalytic activity of Ni_(1.5)Ti_5NbO_(14)
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摘要 由高温固相法制备K3Ti5NbO14,并通过离子交换获得Ni1.5Ti5NbO14.采用XRD、UV-vis-DRS、SEM等技术对所制备样品进行表征.通过红外光谱技术考察样品对甲烷气中甲硫醇的吸附性能与光催化氧化性能.结果表明,Ni2+交换K+后,钛铌酸盐仍保持很好的层状结构,其对光谱的吸收由紫外光区域向可见光区域移动,且吸收强度增加.在流动体系中对甲烷气中的甲硫醇具有吸附活性,静态条件下经紫外光辐射对甲硫醇具有光催化氧化活性. The photocatalyst Ni1.5Ti5NbO14 was prepared by modifying potassium titanoniobate K3Ni1.5Ti5NbO14, which was synthesized by solid-state reaction, through ion-exchange reaction. Structure feature of the sample as-prepared was characterized by means of powder X-ray diffraction （XRD）, UV-visible diffuse reflectance spectroscopy （UV-vis-DRS）, Scanning electron microscope （SEM）. Adsorption feature and photoeatalytie activity for methyl mercaptan in methane were investigated by the method of infrared spectroscopy. The results revealed that the modifying photocatalysis remains layered structure and its band-gap energy decreases after Ni^2＋ ion exchange. Methyl mercaptan in methane could be adsorbed on the surface of the catalysts as-prepared in flow system, and in static system methyl mercaptan could be oxidatod under visible light or UV-light irradiation.
作者 赵俊斌 何杰 罗水源
机构地区 安徽理工大学化学工程学院
出处 《安徽大学学报（自然科学版）》 CAS 北大核心 2009年第5期81-85,共5页 Journal of Anhui University(Natural Science Edition)
基金 安徽省自然科学基金资助项目(070414198) 安徽省教育厅自然科学基金资助项目(KJ2008A121)
关键词 层状化合物 钛铌酸盐 甲硫醇 吸附 光催化 layer compound Titanoniobate methyl mercaptan adsorption photocatalysis
分类号 O643.36 [理学—物理化学]
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参考文献13

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共引文献14

同被引文献22

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安徽大学学报（自然科学版）
2009年 第5期

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