等离子体辅助制备的Co3O4光催化甲苯净化性能研究

Co3O4 Synthesized with the Assistance of Plasma for Photocatalytic Purification of Toluene

齐敏 高栋梁 赵帅 乔旭 崔咪芬 费兆阳

Min Qi Dongliang Gao Shuai Zhao Xu Qiao Mifen Cui Zhaoyang Fei

南京资环工程技术研究院有限公司，江苏 南京 210047 南京工业大学 化工学院/材料化学工程国家重点实验室，江苏 南京 210009

Nanjing Institute of Resources and Environment Engineering Technology Co. LTD，Nanjing Jiangsu 210047，China College of Chemical Engineering，State Key Laboratory of Materials?Oriented Chemical Engineering，Nanjing Tech University，Nanjing Jiangsu 210009，China

等离子体改性是提高催化材料性能的有效途径。利用水热法合成了Co2(OH)2CO3前驱体，通过氧气低温等离子体技术，制备了表面改性的Co3O4催化剂(Co3O4?P)，并对其进行了XRD、O2?TPD、H2?TPR、SEM、TEM、XPS、FTIR、Raman和UV?Vis等表征。结果表明，等离子体处理可以降低Co3O4中Co元素的平均价态，在其表面形成更多的缺陷点位，降低Co3O4的Co-O键能，增强其低温还原性能；在全太阳光谱的光强为776 mW/cm2、反应空速为30 000 mL/（g·h）、甲苯质量分数为500 μg/g的测试条件下，Co3O4?P的甲苯降解率为100.0%,其值约为通过焙烧法制备的Co3O4催化剂（Co3O4?T）的2倍。

Plasma modification is an effective way to improve the catalytic activities of materials.Firstly,Co2(OH)2CO3 precursor was synthesized by a hydrothermal method.Then,the precursor was subjected to the oxygen atmosphere low?temperature plasma, and the surface modified Co3O4 catalyst (Co3O4?P) was obtained,which was further characterized the XRD,SEM,H2?TPR,O2?TPD,TEM,XPS,FTIR,Raman spectrum and UV?visible spectrum.The results demonstrate that plasma treatment could reduce the average valence state of Co elements in Co3O4 to form more defective sites on the catalyst surface,and lower the Co-O bond energy of Co3O4 to improve its low temperature reduction performance.Under the irradiation of full solar spectrum light with intensity of 776 mW/cm2,reaction space velocity of 30 000 mL/（g·h）and toluene concentration of 500 μg/g，the toluene degradation performance of the Co3O4?P catalyst could reach 100.0%，which was approximately twice that of the Co3O4 catalyst (Co3O4?T) prepared by thermal calcination.

国家自然科学青年基金项目(21606130);国家重点研发计划项目(2019YFC1905804);江苏省重点研发计划项目(BE2019735)

10.12422/j.issn.1006-396X.2023.02.006