Green carbonization of waste coffee grounds into porous C/Fe hybrids for broadband and high-efficiency microwave absorption
Article
Wen, Xin, Li, Cui, Liu, Hui, Fan, Guohua, Tang, Yanan, Hao, Chuncheng, Ma, Lili and Song, Pingan. 2024. "Green carbonization of waste coffee grounds into porous C/Fe hybrids for broadband and high-efficiency microwave absorption." Journal of Materials Science and Technology. 170, pp. 1-10. https://doi.org/10.1016/j.jmst.2023.05.073
| Article Title | Green carbonization of waste coffee grounds into porous C/Fe hybrids for broadband and high-efficiency microwave absorption |
|---|---|
| ERA Journal ID | 4724 |
| Article Category | Article |
| Authors | Wen, Xin, Li, Cui, Liu, Hui, Fan, Guohua, Tang, Yanan, Hao, Chuncheng, Ma, Lili and Song, Pingan |
| Journal Title | Journal of Materials Science and Technology |
| Journal Citation | 170, pp. 1-10 |
| Number of Pages | 10 |
| Year | 2024 |
| Publisher | Elsevier |
| Place of Publication | China |
| ISSN | 1005-0302 |
| Digital Object Identifier (DOI) | https://doi.org/10.1016/j.jmst.2023.05.073 |
| Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S1005030223006011 |
| Abstract | Recently great efforts have been focused on designing high-performance microwave absorbers using sustainable biomass resources, but there remains a lack of green and efficient fabrication methods. Herein, inspired by natural porous character of biomass waste, we demonstrated a green one-step route to convert waste coffee grounds into porous C/Fe hybrids, and further explored their potential applications for broadband and high-efficiency microwave absorption. In this design, the WCG-20–750 (incorporated 20 wt% Fe(C₅H₇O₂)₃ catalyst and carbonized at 750 °C) exhibited porous microstructure with the highest char yield of 55.45 wt%. Furthermore, the as-prepared C/Fe hybrids from WCG-20–750 displayed excellent microwave absorption performances. Typically, the minimum reflection loss (RLmin) reached to -52.86 dB and the widest effective absorption bandwidth (EAB) was 6.40 GHz at the thickness of 3.0 mm. This work provides an economically viable and environmentally friendly strategy to convert biomass wastes into value-added microwave absorbers, ultimately making contributions to the upcycling of renewable biomass resources and the fostering of sustainable environment. |
| Keywords | Biomass; Waste recycling; Microwave absorption; Green carbonization |
| Contains Sensitive Content | Does not contain sensitive content |
| ANZSRC Field of Research 2020 | 401602. Composite and hybrid materials |
| Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
| Byline Affiliations | Qingdao University of Science and Technology, China |
| Centre for Future Materials | |
| School of Agriculture and Environmental Science |
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