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- W3014664372 abstract "Purpose The purpose of this work is to controllably synthesize a carbon aerogel with programmable functionally graded performance via a simple and effective strategy. Design/methodology/approach This work uses polyvinyl alcohol (PVA) via the controllable sol-gel, lyophilization, and carbonization approach to achieve a programmable carbon aerogel. This design has the advantages of low raw material and preparation cost, simple and controllable synthetic process and low carbonization temperature. Findings The thermal stability and microstructure of PVA aerogel can be controlled by the crosslinking agent content within a certain range. The crosslinking agent content and the carbonization temperature are the key factors for functionally graded programming of carbon aerogels, including microstructure, oxygen-containing functional groups and adsorption performance. The adsorption ratio and adsorption rate of uranium can be controlled by adjusting initial concentration and pH value of the uranium solution. The 2.5%25 carbon aerogel with carbonization temperature of 350 °C has excellent adsorption performance when the initial concentration of uranium solution is 32 ppm at pH 7.5. Research limitations/implications As a new type of lightweight nano-porous amorphous carbon material, this carbon aerogel has many excellent properties. Originality/value This work presents a simple, low cost and controllable strategy for functionally graded programming of novel carbon aerogel. This carbon aerogel has great potential for application in various fields such as uranium recovery, wastewater treatment, sound absorption and shock absorption." @default.
- W3014664372 created "2020-04-10" @default.
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- W3014664372 date "2020-04-06" @default.
- W3014664372 modified "2023-10-16" @default.
- W3014664372 title "Controllable preparation and functionally graded programming of carbon aerogel" @default.
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- W3014664372 doi "https://doi.org/10.1108/prt-10-2019-0099" @default.
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