反转结构/储氧体的氧空位结构与氧供给行为调变及其催化有机废水研究

To achieve the deeply removing of the organic wastewater with some benzene homologues, the catalytic materials with fast migrating and stably sustained supplying character for oxygen molecules will be constructed. Moreover, the corresponding catalytic performance will also be studied. Firstly, to enhance the migrating velocity of the oxygen molecules on the surface of the catalyst, the inverse catalysts with orienting oxygen vacancies will be expected to obtain by the selected growth of Mn and Co oxides on the metal nanoparticles with high surface energy. Such process will be achieved by preparing various metal nanoparticles such as W and Mo with high surface energy and the slow supplying the oxide ions. Secondly, to obtain a sustaining diffusion of oxygen molecules from oxygen body to the surface of the catalyst, the nanomaterial with reversible and efficient oxygen storage and releasing performance will prepared and were assembled with the foregoing prepared inverse catalysts. Then, the oxygen molecules were controllable supplied from oxygen storage body to the surface of the inverse body. Thirdly, the growth rule of the oxygen vacancies structure for the inverse body and the oxygen storage and releasing mechanism for the oxygen storage body will also be explored. Based on these studies, the structure-activity relationship model between the catalysis performance and the structures of the inverse body and the oxygen storage body will be established. It is expected to provide a new efficient catalyst for achieving the deep removal of the organic wastewater (e.g. phenol and toluene) and to offer an idea for preparing a new catalyst with fast migrating and stably sustained supplying for oxygen.

本项目拟针对苯系有机废水的深度净化，开展氧的快速迁移活化、持续稳定供给型催化材料的制备及其催化性能研究。（1）基于系列不同高能晶面W、Mo等金属纳米粒子的制备，并借助金属氧化物前驱体的慢速控制供给，在所制金属纳米粒子表面选择性生长Mn、Co等金属氧化物，实现具有特定取向氧空位的氧化物/金属型反转结构体的可控制备，以此提高氧在催化剂表面的快速迁移活化；（2）在此基础上，探索性研究高效储氧体的构筑，并借助纳米粒子定向组装技术，将所制反转结构体与储氧体进行组装，通过储氧体向反转结构体进行氧的可控释放，实现氧向催化剂表面的持续稳定供给；（3）探索性研究氧空位结构的生长演变规律及储氧体的储/放氧作用机制，建立氧空位结构、储氧体结构与催化性能间的构效模型，力求为应对苯系典型有机废水（如苯酚、甲苯）的深度净化贡献新型高效催化材料，研究成果也将为氧的快速迁移、持续稳定活化型催化材料的设计提供新思路。

本项目主要针对典型有机废水的深度净化，开展了氧的快速迁移活化、持续稳定供给型催化材料的制备及其热催化氧化性能研究。基于反转结构的构筑实现具有快速氧活化的氧空位结构调变，并借助反转结构/储氧体的结构设计制备出高效的催化氧化型有机废水催化净化材料。经过四年的执行，已在环境催化复合材料的制备及其催化氧化机理研究方面取得了积极进展；并产生了一些未预期的新成果，如针对催化性能显著的氧空位，拓展了其微观结构的调变及其在光催化性能领域的研究。经过项目组成员共同努力，四年来取得了系列创新性研究成果。在国内外重要学术期刊发表论文24篇，其中SCI收录论文21篇；申请发明专利7件，获授权发明专利4件；获安徽省科技进步奖二等奖1项；已毕业硕士研究生3名。