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Adsorption of Formaldehyde by Wood Enhances the Low-Temperature Formaldehyde Oxidation Performance of Pt/TiO 2

Year: 2025

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide This study investigates the influence of wood’s ability to adsorb formaldehyde (HCHO) on the low-temperature HCHO oxidation performance of catalysts. Four types of wood powders from typical tree species (i.e., cypress, bamboo, pine, and metasequoia) and a classic catalyst (i.e., Pt/TiO 2 ) were selected as research subjects and were physically mixed to evaluate their catalytic performance. The results indicate that only pine significantly enhances the low-temperature HCHO oxidation performance of Pt/TiO 2 . When the mixing ratio is set to 1:1, it exhibits optimal catalytic activity, with the HCHO conversion rate increasing from 15 to 40% at room temperature. Structural characterization reveals that various structural parameters of Pt/TiO 2 remained unchanged upon mixing with pine powder. The reaction mechanistic studies indicate that the reaction pathway for low-temperature HCHO oxidation remains consistent in Pt/TiO 2 –Pine compared to those of Pt/TiO 2 . Kinetic analysis demonstrates that while incorporating pine does not alter the activation energy, it results in an increase in its pre-exponential factor by several times. Adsorption experiments confirm the excellent HCHO adsorption capabilities of pine powder. Structure–performance relationship analyses indicate that a low concentration of HCHO is readily captured by pine powder and subsequently transferred to adjacent Pt/TiO 2 for catalyzing its oxidation into CO 2 and H 2 O, thereby exhibiting commendable performance in room-temperature oxidation. The superior HCHO adsorption capacity of pine powder endows Pt/TiO 2 with an enhanced low-temperature HCHO oxidation performance. The present findings provide new insights into potential applications for catalysts as well as efficient technologies for removing HCHO.

Source: ACS Omega

DOI: 10.1021/acsomega.5c09800

Authors: Yinglu Zhang, Chenxuanzhi Ruan, Hongguo Gao, Jun Dai, Tongtong Wei, Licheng Li

Institution: Nanjing Forestry University

Language: English

Topic: Catalytic Processes in Materials Science

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,935

Funders: National Natural Science Foundation of China, China Postdoctoral Science Foundation