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Full bagasse bio-waste derived 3D photothermal aerogels for high efficient solar steam generation

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Abstract

Nowadays, freshwater shortage, energy crisis and environmental pollution are the three major threats to human beings. Bio-waste is an important source of environmental pollutant emissions and a renewable resource with great potential. Herein, we develop a photothermal material based on bagasse for solar steam generation to relieve the freshwater crisis and mitigate environmental pollution caused by bio-waste. The mainly functional part of the solar-driven steam generator here is bagasse-based photothermal aerogel (B-PTA), which composes of carbonized bagasse (CB) and bagasse-derived cellulose fiber (BDCF). The B-PTA relying on CB can effectively absorb sunlight (~ 95%), resulting in a prominent light-to-heat ability. The B-PTA with DBCF has super-hydrophilicity, water transport and retention ability. Depending on the excellent light absorption and 3D water passageway, the B-PTA gives a water evaporation rate of 1.36 kg m–2 h–1, and achieves a photothermal conversion efficiency of 77.34% under 1-sun illumination (1 kW m–2). The B-PTA shows remarkable stability that the efficiency without significant change after 20 cycles. In addition, the B-PTA can effectively desalt seawater and purify dye wastewater with natural sunlight. Therefore, turning bio-waste into valuable photothermal material for solar steam generation is possible. Due to the merits of low cost, scalability, environmental friendliness, B-PTA has the potential for real-world water purification.

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Acknowledgments

This work was supported by the Nation Natural Science Foundation of China (51203125), Hubei Natural Science Foundation (2019CFC905) and the Science and Technology Research Project of the Department of Education of Hubei Province (D20191704).

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JX: Conceptualization, methodology, Writing–review & editing. ZZ: Synthesis, characterization and analysis. YL: Synthesis and characterization. JY: Synthesis and characterization. YW: Synthesis and characterization. BL: SEM characterization. WW: Data analysis. SP: Methodology. XM: Conceptualization and methodology. YG. SEM analysis. ML: Conceptualization and supervision. JP: Data analysis and check the manuscript.

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Correspondence to Ming Li or Junjun Peng.

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

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This article does not contain any studies or researches with human participants nor animals performed by any of the authors which violate ethical standards.

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Xiong, J., Zhang, Z., Liu, Y. et al. Full bagasse bio-waste derived 3D photothermal aerogels for high efficient solar steam generation. Cellulose 29, 927–939 (2022). https://doi.org/10.1007/s10570-021-04323-6

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  • DOI: https://doi.org/10.1007/s10570-021-04323-6

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