The poor mechanical properties of biomass-based carbon aerogels after carbonization severely limit their application in pressure sensing and energy storage for wearable devices and electronic skin. In this work, a supramolecular assembly structure was designed inspired by the unique microstructure of natural wood for the preparation of biomass-based carbon aerogels with supercompressibility, elasticity, stable strain electrical signal response, and wide sensitive detection. Bacterial cellulose and lignin were selected as the main components of the biomass-based composite aerogel 'cell wall'. The graphene oxide with an aromatic structure was introduced to induce the assembly of firmly attached lignin and bacterial cellulose. The prepared biomass-based carbon aerogels exhibit supercompressibility (at least 100 cycles at 90 % strain), high elasticity (88.88 % height retention after 1000 cycles at a strain of 50 %), surprising temperature-constant superelasticity and fatigue resistance (shape retention rate greater than 85 %) at -196 ℃. In particular, it exhibits temperature-invariant high linear sensitivity over an extremely wide operating pressure range (0-43 kPa), allowing accurate detection of human signals. In addition, the prepared carbon aerogels exhibit excellent performance in supercapacitors. It has a specific capacitance of 158F/g at a current density of 1 A/g and an energy density of 18.75 Wh/kg at a high power density of 2500 W/g. This strategy also demonstrates its promise as a wearable device in hostile environments.
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http://dx.doi.org/10.1016/j.jcis.2024.12.051 | DOI Listing |
J Colloid Interface Sci
December 2024
Liaoning Province Key Laboratory of Pulp and Papermaking Engineering, Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, Dalian Polytechnic University, Dalian, Liaoning Province, 116034, China; Shandong Tonye Photoresist Material Technology CO., LTD, Weifang, 261206, China. Electronic address:
J Colloid Interface Sci
December 2024
School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, PR China. Electronic address:
Reducing carbon dioxide (CO) levels in the atmosphere is crucial for combating global warming. One effective strategy involves using porous materials for the combined processes of CO capture and catalytic conversion. In this study, we developed composite aerogel materials using cellulose nanocrystals (CNCs) as templates, doped with cerium oxide, to enhance CO capture and conversion.
View Article and Find Full Text PDFSmall
December 2024
Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province, College of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong, 273165, P. R. China.
Nanostructured Faradaic materials show extraordinary promise for capacitive deionization (CDI) toward the relief of global freshwater scarcity. But at present, there exist at least two shortages for the development of CDI electrode materials. In laboratory studies, evaluating their desalination performance is usually based on low mass loadings (<1 mg cm), which is far behind the practical demand for fabricating high-mass-loading CDI electrodes or devices.
View Article and Find Full Text PDFMolecules
November 2024
Department of Basic and Applied Sciences for Engineering (SBAI), Sapienza University of Rome, Via A. Scarpa 14, 00161 Rome, Italy.
Carbon nanostructures are highly promising materials for applications in a variety of different fields. Besides their interesting performances, the possibility to synthesize them from biowaste makes them an eco-friendly resource widely exploitable within a circular economy context. The present work deals with the green, one-pot synthesis of graphene quantum dots (GQDs) from carbon aerogels (CAs) derived from rice husk (RH).
View Article and Find Full Text PDFInt J Biol Macromol
December 2024
State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China. Electronic address:
Wood based composites with low density and great flame retardancy are increasingly required as sustainable and low-carbon building materials for energy conservation. In this work, the symbiosis between bio-based calcium alginate (CaA) and delignified wood was fabricated to form delignified wood-CaA aerogel composites. The density of the delignified wood@CaA sample was dropped to only 89 kg/m from 120 kg/m of the control wood.
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