摘要
利用化学沉淀法和水热法制备单斜相和正交相WO3纳米片,通过X射线衍射(XRD)、扫描电子显微镜(SEM)对合成产物进行表征.以合成的WO3光催化降解次甲基蓝染料为模型,研究光催化反应的影响因素,比较不同物相WO3的催化性能,测定单斜相和正交相WO3的带隙能.与正交相产物相比,单斜相WO3的带隙能较小,更容易发生电子吸光和跃迁,产生数量较多的电子-空穴对,因而具有较高的光催化活性.
Monoclinic and orthorhombic WO3 nanoflakes were invidiously obtained by chemical precipitation and hydrothermal treatment. The products were characterized via X-ray diffraction （XRD） and field emitted scanning electron microscopy （FESEM）. The photoeatalytie activities of as-synthesized WO3 nanoflakes for methylene blue were researched. The band gaps of as-prepared products were determined by UV-Vis absorption spectra. Compared with orthorhombie WO3, the band gap of monoelinic tungsten trioxide was lower. So, the photocatalytic activities of monoelinie WO3 was higher due to more electron-hole pairs.
出处
《安徽大学学报（自然科学版）》
CAS
北大核心
2009年第3期73-77,共5页
Journal of Anhui University(Natural Science Edition)
基金
安徽省教育厅自然科学基金资助项目(2005KJ100)
安徽省高等学校“十五”优秀人才建设基金资助项目
安徽大学人才队伍建设基金资助项目
关键词
纳米片
WO3
制备
光催化降解
物相
nanoflakes
WO3
preparation
photocatalytic degradation
phase
