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Hierarchically porous bacterial cellulose nanofibrous membranes for selective adsorption and real-time colorimetric monitoring of volatile carboxylic acids

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Abstract

Volatile carboxylic acids (VCAs) are intensively generated via bioengineering and widely used in food, textile, and cosmetic industries, but the efficient separation, collection, and regeneration of VCAs still face challenges. Here, we report a design and application of novel hierarchically porous structures built on bacterial cellulose nanofibrous membrane to effectively adsorb VCAs and to reveal the adsorptive status of the material at the same time. By in situ growing a triazine-based porous organic polymer on the nanofibers, the composite achieved integrated features of the co-existence of micro/meso/macropores, high specific surface area (255 m2/g), good flexibility, and selective affinity to VCAs, resulting in record-high adsorption capacities toward formic acid (815.36 mg/g) and acetic acid (754.21 mg/g). Moreover, the introduction of colorimetric probes onto the composite allows a visual indication of the adsorption-desorption process, i.e., the working status of the material, in real time. The successful fabrication of a bifunctional, hierarchical porous cellulose-based nanofibrous membrane could inspire the development of green adsorbents with improved efficacy and flexibility for gas capture and filtration.

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Funding

This work is supported by the Open Fund Project of Zhejiang Key Laboratory of Clean Dyeing and Finishing Technology (QIRZ2208) and the National Key Research and Development Program of China (2022YFC3006100).

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PT conceived and designed the research, carried out the experiments, prepared Figs. 1, 2, 3 and 4, and wrote the manuscript. XS performed material characterizations and prepared supplementary material. YS and GS revised the manuscript.

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Correspondence to Peixin Tang or Xiyu Song.

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The authors declare that they have no known competing financial interests or personal relationships that could appear to influence the work reported in this paper.

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No animal studies or human participants were involved in this study.

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Tang, P., Si, Y., Song, X. et al. Hierarchically porous bacterial cellulose nanofibrous membranes for selective adsorption and real-time colorimetric monitoring of volatile carboxylic acids. Cellulose 31, 381–393 (2024). https://doi.org/10.1007/s10570-023-05632-8

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  • DOI: https://doi.org/10.1007/s10570-023-05632-8

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