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Here we report a new strategy for fabrication of macro/mesoporous carbon monolith from commercially available and low-cost melamine sponge. This synthesis route involves the cooperative self-assembly and coating of block copolymer mixed with resol on the melamine sponge, followed by pyrolysis at different temperatures. The as-fabricated carbon monolith exhibits high porosity and excellent hydrophobicity,...
Here we report a new strategy for preparation of water-soluble photoluminescent carbon quantum dots (CQDs) from petroleum coke. Petroleum coke was oxidized first in mixed concentrated H2SO4 and HNO3, and then functionalized by hydrothermal ammonia treatment. The as-made CQDs and nitrogen-doped CQDs (N-CQDs) were characterized by UV–Vis absorption spectroscope, fluorescence spectroscope, transmission...
Silicon carbide fibers were prepared by the reaction between activated carbon fibers and silicon monoxide generated from a mixture of silicon and silicon dioxide at temperatures from 1200 to 1300 o C in an inert atmosphere of argon. The reaction was completed at temperatures as low as 1200 o C, which means that activated carbon fibers had a high reactivity. The resulting sample maintained...
The tailoring of pore surface chemistry of activated carbon fibers is shown to be an effective method for improving the adsorption efficiency of various volatile chemical compounds (VOCs). An oxidation treatment with air resulted in a significant increase in the adsorption capacities and breakthrough time for Rayon-based activated carbon fibers (ACFs) in removal of formaldehyde. The porous structure...
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