α-Fe2O3异质复合ZnO光催化剂的液相合成及其降解氯酚有机毒物的性能研究

项目名称： α-Fe2O3异质复合ZnO光催化剂的液相合成及其降解氯酚有机毒物的性能研究

项目编号： No.21206026

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 化学工程及工业化学

项目作者： 谢娟

作者单位： 河北工程大学

项目金额： 25万元

中文摘要： 基于α-Fe2O3禁带宽度窄、化学稳定性高、室温铁磁性良好及耐酸碱、耐光腐蚀等优良特性，本项目拟采用工艺简单的水热技术一步合成微/纳米α-Fe2O3/ZnO复合光催化剂；在改变反应条件以实现α-Fe2O3/ZnO复合催化剂粒度及形貌可控制备的同时，阐明其形成机理；选用自然环境中难于降解的氯酚类有机毒物对α-Fe2O3/ZnO复合物的性能进行评价；借助多种表征手段，从化学和物理学双重角度揭示α-Fe2O3/ZnO复合催化剂微观结构、粒度及形貌与其光吸收特性、磁性能和光催化活性、磁分离效果之间的关系。课题的完成不仅有望实现单一光催化材料间的功能互补，克服纯ZnO易发生光腐蚀及在强酸性和碱性溶液中易溶解的缺陷，进一步拓宽ZnO的光谱响应范围，提高其光催化活性，使微/纳米粉体可通过磁分离技术进行回收再利用，所得成果还能为非钛基光催化材料的开发与实际应用提供有益借鉴，因而具有重要的理论和现实意义。

中文关键词： ZnO；α-Fe2O3；复合催化剂；光催化；氯酚

英文摘要： α-Fe2O3 has many excellent characteristics, for instance, narrow band gap, high chemical stability, good ferromagnetism at room temperature, acid and alkali resistance and light corrosion resistance. In this project, a simple one-step hydrothermal method is developed to produce micro-nano α-Fe2O3/ZnO composite photocatalyst. The size and morphology of α-Fe2O3/ZnO composite catalyst are regulated by changing the reaction conditions. Meanwhile, the formation mechanism of α-Fe2O3/ZnO composite catalyst is also clarified. Chlorophenol organic toxicants, which are very difficult to degrade in natural environment, are chosen to evaluate the photocatalysis property of α-Fe2O3/ZnO composite. Various characterization means are used to reveal the relationship between microstructure, size and morphology of α-Fe2O3/ZnO composite catalyst and its optical absorption property, magnetic performance, photocatalytic activity and magnetic separation effect from the double angles of view of chemistry and physics. The results of this study can not only realize the function complementariness between two photocatalysis materials, overcome the inherent defects of pure ZnO such as light instability and high solubility in strong acidic and alkaline solutions, further extend the spectral response range of ZnO, improve its photocatalytic a

英文关键词： ZnO；α-Fe2O3；composite catalyst；photocatalysis；chlorophenol