Controlled Preparation of Coconut Shell-Based Activated Carbon Fiber-Supported Mesoporous δ-MnO₂ and Formaldehyde Decomposition Performance 


Vol. 27,  No. 3, pp. 1159-1172, Mar.  2026
10.1007/s12221-025-01286-4


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  Abstract

This study aims to develop the multifunctional air purification material integrating efficient formaldehyde catalytic degradation and PM2.5 interception capabilities by controllably synthesizing coconut shell-based activated carbon fiber loaded with mesoporous δ-MnO₂ (δ-MnO₂@ACF). Using ACF as the substrate, MnO₂ was loaded onto its surface via the hydrothermal method, with systematic investigation of the effects of hydrothermal temperature (90–180 °C), KMnO₄ concentration (0.005–0.05 mol/L) and reaction time (2–8 h) on the morphology and crystal phase of MnO₂. The highly active mesoporous δ-MnO₂@ACF composite was successfully prepared. Characterization techniques including SEM, XRD, and BET confirmed the mesoporous structure of δ-MnO₂ and its uniform loading on ACF. Formaldehyde (HCHO) removal tests demonstrated that δ-MnO₂@ACF achieved the removal efficiency of 92%, maintaining 76% efficiency after 6 cycles (150 min). Furthermore, the composite filter material fabricated based on this material exhibited not only outstanding formaldehyde degradation performance but also high PM2.5 interception efficiency (> 99%). This study provides a feasible strategy for developing multifunctional air purification materials combining catalytic oxidation and filtration properties, showing potential application value in indoor air pollution control.

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  Cite this article

[IEEE Style]

X. Zhang, H. Sang, F. Liu, L. Du, H. Zhang, J. Qiao, W. Fan, M. Yuan, "Controlled Preparation of Coconut Shell-Based Activated Carbon Fiber-Supported Mesoporous δ-MnO₂ and Formaldehyde Decomposition Performance," Fibers and Polymers, vol. 27, no. 3, pp. 1159-1172, 2026. DOI: 10.1007/s12221-025-01286-4.

[ACM Style]

Xianhua Zhang, Hongyang Sang, Fan Liu, Linlin Du, Hui Zhang, Jinsheng Qiao, Wenbo Fan, and Mengyu Yuan. 2026. Controlled Preparation of Coconut Shell-Based Activated Carbon Fiber-Supported Mesoporous δ-MnO₂ and Formaldehyde Decomposition Performance. Fibers and Polymers, 27, 3, (2026), 1159-1172. DOI: 10.1007/s12221-025-01286-4.

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