Highly efficient ozone elimination by metal doped ultra-fine Cu2O nanoparticles

Anqi Wang; Le Zhang; Jian Guan; Xiaoze Wang; Guojun Ma; Guijun Fan; Hang Wang; Ning Han; Yunfa Chen

doi:10.1016/j.jes.2022.06.008

Highly efficient ozone elimination by metal doped ultra-fine Cu₂O nanoparticles

J Environ Sci (China). 2023 Dec:134:108-116. doi: 10.1016/j.jes.2022.06.008. Epub 2022 Jun 17.

Authors

Anqi Wang¹, Le Zhang¹, Jian Guan¹, Xiaoze Wang¹, Guojun Ma¹, Guijun Fan¹, Hang Wang², Ning Han³, Yunfa Chen⁴

Affiliations

¹ State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; Key Laboratory of Science & Technology on Particle Materials, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
² State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
³ State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; Key Laboratory of Science & Technology on Particle Materials, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China. Electronic address: nhan@ipe.ac.cn.
⁴ State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; Key Laboratory of Science & Technology on Particle Materials, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China. Electronic address: chenyf@ipe.ac.cn.

PMID: 37673525
DOI: 10.1016/j.jes.2022.06.008

Abstract

Nowadays, ozone contamination becomes dominant in air and thus challenges the research and development of cost-effective catalyst. In this study, metal doped Cu₂O catalysts are synthesized via reduction of Cu²⁺ by ascorbic acid in base solutions containing doping metal ions. The results show that compared with pure Cu₂O, the Mg²⁺ and Fe²⁺ dopants enhance the O₃ removal efficiency while Ni²⁺ depresses the activity. In specific, Mg-Cu₂O shows high O₃ removal efficiency of 88.4% in harsh environment of 600,000 mL/(g·hr) space velocity and 1500 ppmV O₃, which is one of the highest in the literature. Photoluminescence and electron paramagnetic spectroscopy characterization shows higher concentration of crystal defects induced by the Mg²⁺ dopants, favoring the O₃ degradation. The in-situ diffuse reflectance Fourier transform infrared spectroscopy shows the intermediate species in the O₃ degradation process change from O₂^2- dominant of pure Cu₂O to O₂^- dominant of Mg-Cu₂O, which would contribute to the high activity. All these results show the promising prospect of the Mg-Cu₂O for highly efficiency O₃ removal.

Keywords: Cu(2)O; Dopant; Ozone catalyst; Ultra-fine nanoparticles.

MeSH terms

Ascorbic Acid
Metals
Nanoparticles*
Ozone*
Spectroscopy, Fourier Transform Infrared

Substances

Ascorbic Acid
Metals
Ozone