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Two modification methods, including oxygen (O2) plasma activation and chemical treatment using nitric acid (HNO3), sulfuric acid (H2SO4), hydrogen peroxide (H2O2), and urea, were further employed to enhance their adsorption performance. Various carbonyl group (C=O), ether bond (C-O), carboxyl group (O-C=O) and pyridinic nitrogen (N), pyrrolic N, and quaternary N functional groups were successfully introduced onto the surface of the BCNMs by the two methods. The BCNM-O2 showed optimal formaldehyde absorption capacity (120.67 mg g\u22121), corresponding to its highest contents of N, O-containing functional groups, and intact network structure. However, chemical treatment in strong acid or oxidative solutions destructed the microporous structures and changed the size uniformity of fibers in the BCNMs, resulting in a decline in formaldehyde adsorption capacity. A synergistically physical\u2013chemical adsorption took place during formaldehyde adsorption by the modified biomass nanofiber membranes, due to the coexistence of suitable functional groups and porous structures in the membranes.<\/jats:p>","DOI":"10.3390\/molecules30102184","type":"journal-article","created":{"date-parts":[[2025,5,16]],"date-time":"2025-05-16T06:57:28Z","timestamp":1747378648000},"page":"2184","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["A Comparative Study on Absorption of Gaseous Formaldehyde by Electrospun Biomass Carbon Nanofiber Membranes Modified by Plasma Activation and Chemical Treatment"],"prefix":"10.3390","volume":"30","author":[{"given":"Qian","family":"He","sequence":"first","affiliation":[{"name":"Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, International Joint Research Center for Biomass Materials, College of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jinhui","family":"Xiong","sequence":"additional","affiliation":[{"name":"Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, International Joint Research Center for Biomass Materials, College of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9566-7486","authenticated-orcid":false,"given":"Huanbo","family":"Wang","sequence":"additional","affiliation":[{"name":"Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, International Joint Research Center for Biomass Materials, College of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6074-8748","authenticated-orcid":false,"given":"Linkun","family":"Xie","sequence":"additional","affiliation":[{"name":"Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, International Joint Research Center for Biomass Materials, College of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6546-7707","authenticated-orcid":false,"given":"Xijuan","family":"Chai","sequence":"additional","affiliation":[{"name":"Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, International Joint Research Center for Biomass Materials, College of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2649-8623","authenticated-orcid":false,"given":"Lianpeng","family":"Zhang","sequence":"additional","affiliation":[{"name":"Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, International Joint Research Center for Biomass Materials, College of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5666-9390","authenticated-orcid":false,"given":"Siqun","family":"Wang","sequence":"additional","affiliation":[{"name":"Center for Renewable Carbon, The University of Tennessee, Knoxville, TN 37996, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guanben","family":"Du","sequence":"additional","affiliation":[{"name":"Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, International Joint Research Center for Biomass Materials, College of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3466-2486","authenticated-orcid":false,"given":"Kaimeng","family":"Xu","sequence":"additional","affiliation":[{"name":"Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, International Joint Research Center for Biomass Materials, College of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,5,16]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"140761","DOI":"10.1016\/j.scitotenv.2020.140761","article-title":"An efficient strategy for the enhancement of adsorptivity of microporous carbons against gaseous formaldehyde: Surface modification with aminosilane adducts","volume":"743","author":"Vikrant","year":"2020","journal-title":"Sci. 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