Enhanced and Sustainable Removal of Indoor Formaldehyde by Naturally Porous Bamboo Activated Carbon Supported with MnO: Synergistic Effect of Adsorption and Oxidation

Overview

Journal Molecules

Publisher MDPI

Specialty Biology

Date 2024 Feb 10

PMID 38338407

Authors

Zhenrui Li

Yujun Li

Shijie Li

Jianfeng Ma

Qianli Ma

Zhihui Wang

Jiajun Wang

Keying Long

Xinge Liu

Affiliations

Soon will be listed here.

Abstract

Novel bamboo activated carbon (BAC) catalysts decorated with manganese oxides (MnO) were prepared with varying MnO contents through a facile one-step redox reaction. Due to the physical anchoring effect of the natural macropore structure for catalyst active components, homogeneous MnO nanoparticles (NPs), and high specific surface area over catalyst surface, the BAC@MnO-N (N = 1, 2, 3, 4, 5) catalyst shows encouraging adsorption and catalytic oxidation for indoor formaldehyde (HCHO) removal at room temperature. Dynamic adsorption and catalytic activity experiments were conducted. The higher S (733 m/g) and V/V (82.6%) of the BAC@MnO-4 catalyst could facilitate its excellent saturated and breakthrough adsorption capacity (5.24 ± 0.42 mg/g, 2.43 ± 0.22 mg/g). The best performer against 2 ppm HCHO is BAC@MnO-4 catalyst, exhibiting a maximum HCHO removal efficiency of 97% for 17 h without any deactivation as RH = 0, which is higher than those of other MnO-based catalysts. The average oxidation state and in situ DRIFTS analysis reveal that abundant oxygen vacancies on the BAC@MnO-4 catalyst could be identified as surface-active sites of decomposing HCHO into the intermediate species (dioxymethylene and formate). This study provides a potential approach to deposit MnO nanoparticles onto the BAC surface, and this hybrid BAC@MnO material is promising for indoor HCHO removal at room temperature.

References

Cao X, Tarr M . Aldehyde and Ketone Photoproducts from Solar-Irradiated Crude Oil-Seawater Systems Determined by Electrospray Ionization-Tandem Mass Spectrometry. Environ Sci Technol. 2017; 51(20):11858-11866. DOI: 10.1021/acs.est.7b01991. View

Liao P, Yuan S, Xie W, Zhang W, Tong M, Wang K . Adsorption of nitrogen-heterocyclic compounds on bamboo charcoal: kinetics, thermodynamics, and microwave regeneration. J Colloid Interface Sci. 2012; 390(1):189-95. DOI: 10.1016/j.jcis.2012.09.037. View

Gao X, Liu S, Zhang Y, Luo Z, Cen K . Physicochemical properties of metal-doped activated carbons and relationship with their performance in the removal of SO2 and NO. J Hazard Mater. 2011; 188(1-3):58-66. DOI: 10.1016/j.jhazmat.2011.01.065. View

Wang J, Zhang P, Li J, Jiang C, Yunus R, Kim J . Room-Temperature Oxidation of Formaldehyde by Layered Manganese Oxide: Effect of Water. Environ Sci Technol. 2015; 49(20):12372-9. DOI: 10.1021/acs.est.5b02085. View

Liu H, Yang B, Xue N . Enhanced adsorption of benzene vapor on granular activated carbon under humid conditions due to shifts in hydrophobicity and total micropore volume. J Hazard Mater. 2016; 318:425-432. DOI: 10.1016/j.jhazmat.2016.07.026. View

Jing W, Yang C, Luo S, Lin X, Tang M, Zheng R . One-Pot Method to Synthesize Silver Nanoparticle-Modified Bamboo-Based Carbon Aerogels for Formaldehyde Removal. Polymers (Basel). 2022; 14(5). PMC: 8912511. DOI: 10.3390/polym14050860. View

Yang R, Guo Z, Cai L, Zhu R, Fan Y, Zhang Y . Investigation into the Phase-Activity Relationship of MnO Nanomaterials toward Ozone-Assisted Catalytic Oxidation of Toluene. Small. 2021; 17(50):e2103052. DOI: 10.1002/smll.202103052. View

Salthammer T, Mentese S, Marutzky R . Formaldehyde in the indoor environment. Chem Rev. 2010; 110(4):2536-72. PMC: 2855181. DOI: 10.1021/cr800399g. View

Shi L, Zhou X, Guo Y, Li Y, Yan C, Han Q . Designing of 3D MnO-graphene catalyst on sponge for abatement temperature removal of formaldehyde. J Hazard Mater. 2022; 441:129836. DOI: 10.1016/j.jhazmat.2022.129836. View

10.

Xu H, Yan N, Qu Z, Liu W, Mei J, Huang W . Gaseous Heterogeneous Catalytic Reactions over Mn-Based Oxides for Environmental Applications: A Critical Review. Environ Sci Technol. 2017; 51(16):8879-8892. DOI: 10.1021/acs.est.6b06079. View

11.

Na C, Yoo M, Tsang D, Kim H, Kim K . High-performance materials for effective sorptive removal of formaldehyde in air. J Hazard Mater. 2018; 366:452-465. DOI: 10.1016/j.jhazmat.2018.12.011. View

12.

Pan Y, You Y, Xin S, Li Y, Fu G, Cui Z . Photocatalytic CO Reduction by Carbon-Coated Indium-Oxide Nanobelts. J Am Chem Soc. 2017; 139(11):4123-4129. DOI: 10.1021/jacs.7b00266. View

13.

Yoon Y, Nelson J . Application of gas adsorption kinetics. I. A theoretical model for respirator cartridge service life. Am Ind Hyg Assoc J. 1984; 45(8):509-16. DOI: 10.1080/15298668491400197. View

14.

Peng S, Yang X, Strong J, Sarkar B, Jiang Q, Peng F . MnO-decorated N-doped carbon nanotube with boosted activity for low-temperature oxidation of formaldehyde. J Hazard Mater. 2020; 396:122750. DOI: 10.1016/j.jhazmat.2020.122750. View