| Title: | Investigation of defect-rich CeO(2) catalysts for super low-temperature catalytic oxidation and durable styrene removal |
| Author(s): | Zhang Y; Zhang L; Lu J; Liao W; Zhang J; Gao X; Luo Y; Zhu W; |
| Address: | "Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, PR China; The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province/The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming, 650500, PR China. Yunnan University/Yunnan Key Laboratory of Micro/Nano Materials & Technology, Kunming, 650500, PR China. Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, PR China; The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province/The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming, 650500, PR China; Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, 650093, PR China. Electronic address: environcatalysis@kust.edu.cn. Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, PR China; The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province/The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming, 650500, PR China. Electronic address: zhuwenjie17@163.com" |
| DOI: | 10.1016/j.chemosphere.2022.134863 |
| ISSN/ISBN: | 1879-1298 (Electronic) 0045-6535 (Linking) |
| Abstract: | "Spherical cerium dioxide (CeO(2)-S) nanoparticles were successfully prepared using a solvothermal method, and their performances in catalytic oxidation reactions were studied. The CeO(2)-S catalyst showed superior low-temperature catalytic activity for styrene removal (T(90) = 118 degrees C, GHSV = 18,000 h(-1)) compared with commercial CeO(2). The characterization results showed that there were numerous oxygen defects in CeO(2)-S that were key to its catalytic performance at low temperatures, high redox properties, and high adsorption capacity for the reaction gases (O(2) and styrene). Moreover, the catalytic performance of CeO(2)-S was highly stable (132 h), and the particles were reusable. FTIR and in-situ DRIFTS results showed that the type of intermediates formed during the oxidation of styrene determined the CeO(2) catalytic stability, and the main intermediates were bidentate carbonate species that accumulated on the surface of deactivated CeO(2)-S and were not thermally stable. Moreover, the soft carbon that also deposited on CeO(2)-S during the reaction was easily decomposed at higher temperatures. The role of the oxygen vacancies on the CeO(2)-S catalyst was further revealed by correlating the concentration of oxygen vacancies and the accumulation of coke on the catalyst surface" |
| Keywords: | Carbonate and coke resistance Gaseous styrene Low temperature catalytic oxidation Oxygen vacancies Spherical cerium dioxide; |
| Notes: | "PubMed-not-MEDLINEZhang, Ying Zhang, Liming Lu, Jichang Liao, Wei Zhang, Jin Gao, Xiaoya Luo, Yongming Zhu, Wenjie eng England 2022/05/14 Chemosphere. 2022 Sep; 303(Pt 1):134863. doi: 10.1016/j.chemosphere.2022.134863. Epub 2022 May 10" |
