Effect of A, B-site cation on the catalytic activity of La1−xAxMn1-yByO3 (A = Ce, B = Ni) perovskite-type oxides for toluene oxidation

• Published in: Environmental science and pollution research international 2023-03, Vol.30 (13), p.36993-37003
• Main Authors: Yuan, Bo, Tao, Yuwei, Qi, Songya, Xie, Aijuan, Luo, Shiping
• Format: Article
• Language: English
• Subjects: Aquatic Pollution; Atmospheric Protection/Air Quality Control/Air Pollution; Earth and Environmental Science; Ecotoxicology; Environment; Environmental Chemistry; Environmental Health; Research Article; Waste Water Technology; Water Management; Water Pollution Control
• ISSN: 1614-7499; 1614-7499
• DOI: 10.1007/s11356-022-24916-3

ABO 3 -type perovskites (A = La, Ce; B = Mn, Ni) were prepared by sol–gel method, and applied for catalytic oxidation of toluene. The activity test results show that the activity of LaMnO 3 can be improved when a small amount of Ce and Ni are doped into the A and B sites of LaMnO 3 , respectively. The effects of different calcination temperatures and different calcination time on the preparation of La-based perovskites were also investigated. The results illustrate that the toluene conversion of La 0.8 Ce 0.2 Mn 0.8 Ni 0.2 O 3 is the highest when the calcination temperature is 700 °C and the calcination time is 4 h in La 1-x Ce x Mn 1-y Ni y O 3 perovskites, and it requires lower reaction temperature when the conversion rate of toluene reaches 100% as compared to other catalysts, the T 90 is 295 °C ( T 90 , the temperature corresponding to the 90% of toluene conversion). Importantly, the mechanism of catalytic oxidation was also discussed. Therefore, the catalyst has potential prospects in the volatile organic compounds (VOCs) degradation.