Formaldehyde Oxidation of Ce0.8Zr0.2O2 Nanocatalysts for Room Temperature: Kinetics and Effect of pH Value

Zonglin Yang; Gaoyuan Qin; Ruijiu Tang; Lijuan Jia; Fang Wang; Tiancheng Liu

doi:10.3390/nano13142074

Formaldehyde Oxidation of Ce_0.8Zr_0.2O₂ Nanocatalysts for Room Temperature: Kinetics and Effect of pH Value

Nanomaterials (Basel). 2023 Jul 14;13(14):2074. doi: 10.3390/nano13142074.

Authors

Zonglin Yang¹, Gaoyuan Qin², Ruijiu Tang¹, Lijuan Jia¹, Fang Wang¹, Tiancheng Liu¹

Affiliations

¹ College of Chemistry and Environment, Yunnan Minzu University, Technology Innovation Team of Green Purification Technology for Industrial Waste Gas, Education Department of Yunnan, Key Laboratory of Environmental Functional Materials, Yunnan Province Education Department, Kunming 650504, China.
² China Energy Engineering Group Yunnan Electric Power Design Institute Co., Ltd., Kunming 650051, China.

Abstract

Ce_0.8Zr_0.2O₂ catalysts were prepared via the co-precipitation method under different pH conditions. The catalysts were characterized via TEM, XRD, XPS, BET, Raman, and FTIR. The oxidation performance of formaldehyde was tested. Precipitation pH affects the physicochemical properties and performance of the Ce_0.8Zr_0.2O₂ catalyst. By controlling the precipitation pH at 10.5, the Ce_0.8Zr_0.2O₂ catalyst with the largest specific surface area, the smallest grain size with the best formaldehyde removal rate (98.85%), abundant oxygen vacancies, and the best oxidation performance were obtained. Meanwhile, the kinetic parameters of the catalyst were experimentally investigated and the calculated activation energy was 12.6 kJ/mol and the number of reaction steps was 1.4 and 1.2.

Keywords: Ce0.8Zro.2O2 catalysts; catalytic oxidation; formaldehyde; kinetics parameters.

Abstract

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