Carbon-silica composites with mesoporous structures were synthesized from low-cost materials by conventional heating. The carbon source used was vinasse, a by-product of ethanol production molasses, while Na2SiO3 and K2SiO3 utilized as low cost abundantly available silica sources alternatives to tetraethyl orthosilicate (TEOS). simple preparation method adopted follows: vinasse dehydrated 50% H...