磁性硼掺杂氧化银宽光谱高效光催化剂机理研究和可控制备

项目名称： 磁性硼掺杂氧化银宽光谱高效光催化剂机理研究和可控制备

项目编号： No.21476146

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 有机化学

项目作者： 蒋炜

作者单位： 四川大学

项目金额： 80万元

中文摘要： 我们发现，氧化银经硼掺杂后可在太阳光下实现有机物快速降解，但其快速降解机理及硼在该过程中作用还待研究，面向应用适合于快速光催化剂的光反应器还待开发。研究硼掺杂氧化银半导体光催化过程机理并考察硼掺杂的作用，将经硼掺杂调控性能和稳定性的氧化银光催化剂负载于磁性纳米颗粒上，构建磁性核壳型硼掺杂氧化银高效光催化剂用于构建磁稳定床光催化反应器是解决上述问题的可行方法。氧化银光催化剂反应机理和降解途径的研究、硼对氧化银光催化剂性能和寿命影响的考察、磁性纳米颗粒上氧化银的负载、光催化磁悬浮反应床的构建是关键。研究氧化银的光催化途径和硼在氧化银光催化过程中的作用机理可为进一步提高窄禁带光催化剂性能、稳定性和光利用效率提供参考；考察磁性纳米颗粒对光催化剂性能影响，明确快速光催化剂光照条件下传质和反应动力学规律，构建其在磁稳定床系统中的传质反应模型，可为快速光催化剂规模应用提供理论基础。

中文关键词： 光催化剂；反应机理；核壳结构；氧化银；磁稳定床

英文摘要： We found that the borate-doped silver oxide semiconductor could photo-degrade organic pollutant with high degraded speed under solar light. But its working mechanism under light irradiation and the function of doped borate in this process is not clear yet, and its performance, stability and light utilization efficiency can be improved further. And for further application, the cost of Ag2O photocatalyst should be lowered and the recovery rate should be increased, and the specialized reactor for such Ag2O photocatalyst with high photo-reaction rate should be studied and designed. The construction of core-shell structure by loading B-doped Ag2O on the surface of magnetic nano-particles, and application of such core-shell magnetic photo-catalyst in magnetically stabilized bed photo- reactor is a feasible approach for utilization and recovery of such high-performance photocatalyst. In this strategy, the understanding of the working mechanism of Ag2O photocatalyst, the function of doped borate in Ag2O photocatalytic process, the loading of Ag2O on magnetic particles, and the building of magnetically stabilized suspended photoreactor are the key problems to be resolved. The systematic research of photocatalytic route of photocatalyst with narrow band gap and the role of borate in photocatalytic process can help to further improve the performance, stability and light utilization efficiency of photocatalyst. The study of the influence of magnetic nano-particles on the performance of photocatalyst, the mass transfer and reaction kinetics of high-performance photocatalyst under light irradiation, and the model of mass-transfer and reaction in magnetically stabilized suspended photoreactor can provide the theoretical basis for application of high-performance photocatalyst.

英文关键词： Photocatalyst;Reaction mechanism;Core-shell structure;Silver oxide;Magnetically stabilized bed