Details

Autor(en) / Beteiligte

• Duan, Chaomin
• Zhou, Yanlin
• Meng, Mianwu
• Huang, Huang
• Ding, Hua
• Zhang, Qi
• Huang, Renyuan
• Yan, Mengjuan

Titel

Research on the elimination of low-concentration formaldehyde by Ag loaded onto Mn/CeO catalyst at room temperature

Ist Teil von

• Physical chemistry chemical physics : PCCP, 2023-09, Vol.25 (36), p.24495-2457

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Formaldehyde (HCHO) is one of the major air pollutants, and its effective removal at room temperature has proven to be a great challenge. In this study, an Ag/Mn/CeO 2 catalyst for the catalytic oxidation of low-concentration HCHO at room temperature was prepared by a hydrothermal-calcination method. The removal performance of the Ag/Mn/CeO 2 catalyst for HCHO was systematically studied, and its surface chemical properties and microstructure were analyzed. The incorporation of Ag did not change the mesoporous structure of the Mn/CeO 2 catalyst but reduced the pore size and specific surface area. The Ag species included metallic Ag as the main component and part of Ag + . The well-dispersed Ag species on the catalyst provided sufficient active sites for the catalytic oxidation of HCHO. The more the Ag active sites, the more the lattice defects and oxygen vacancies generated from the interaction of Ag with Mn/CeO 2 . Precisely because of this, the Ag/Mn/CeO 2 catalyst exhibited high catalytic activity for HCHO at room temperature with a removal efficiency of 96.76% within 22 h, which is 22.91% higher than that of the Mn/CeO 2 catalyst. Moreover, the Ag/Mn/CeO 2 catalyst showed good cycling stability and the removal efficiency reached 85.77% after five cycles. Therefore, the as-prepared catalyst is an effective and sustainable material that can be used to remove HCHO from actual indoor polluted air. This paper provides ideas for the research and development of efficient catalysts. An Ag/Mn/CeO 2 catalyst was synthesized by a simple hydrothermal-calcination method. Compared with the Mn/CeO 2 catalyst, its comprehensive performance was greatly improved and it can be recycled, thereby showing potential for industrial applications.