离子液体辅助水热法制备锡酸锌的研究

发布时间：2018-03-30 03:28

本文选题：离子液体　切入点：水热合成　出处：《光谱学与光谱分析》2017年04期

【摘要】：采用离子液体辅助水热法制备锡酸锌,考察了溶液pH值、水热反应时间及水热反应温度对锡酸锌晶体结构、形貌及光催化性能的影响。采用X射线衍射(XRD)确定锡酸锌的晶体结构、结晶水平及相的纯净程度;透射电子显微镜(TEM)用来分析制得的锡酸锌的形貌;通过在紫外光照射下光催化降解亚甲基蓝进行锡酸锌的光催化性能研究,结果表明:溶液pH值为9、水热反应温度为220℃、水热反应时间为32h制得的锡酸锌对亚甲基蓝有最高的光催化降解活性。对锡酸锌降解亚甲基蓝的光催化机理探究表明:锡酸锌光催化活性的差异主要归因于缺陷,缺陷往往成为电子-空穴复合中心,导致光催化活性不高;羟基自由基是光催化反应的主要活性物种。
[Abstract]:Preparation of zinc stannate assisted hydrothermal method using ionic liquid, effects of solution pH value, reaction time and the zinc stannate crystal structure of hydrothermal reaction temperature, morphology and photocatalytic properties. By using X ray diffraction (XRD) to determine the crystal structure of zinc stannate, crystallization and phase purity level; transmission electron microscopy (TEM) were used to analyze the zinc stannate prepared; through the study of photocatalytic properties under UV irradiation, the photocatalytic degradation of methylene blue by zinc stannate. The results showed that the pH value of the solution was 9, reaction temperature is 220 DEG C, hydrothermal reaction time for zinc stannate 32H prepared with the highest photocatalytic activity for methylene blue. The photocatalytic mechanism of zinc stannate degradation of methylene blue on zinc stannate showed that the difference of photocatalytic activity is mainly attributed to defects, defects often become the electron hole recombination centers, leading to low photocatalytic activity The hydroxyl radical is the main active species of the photocatalytic reaction.

【作者单位】：西安建筑科技大学冶金工程学院;
【基金】：国家自然科学基金项目(51478379,51278407);国家自然科学基金青年科学基金项目(21301135)资助
【分类号】：O643.36

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