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Fast Microwave-assisted Synthesis of Tailored Mesoporous Carbon Xerogels by E.G. Calvo; E.J. Juárez-Pérez; J.A. Menéndez; A. Arenillas is a Chemistry article available to read on EtoBox.

What is Fast Microwave-assisted Synthesis of Tailored Mesoporous Carbon Xerogels about?

Resorcinol-formaldehyde carbon xerogels with several initial pH were synthesized using two different heating methods (conventional and microwave heating). The effect of the pH of the precursor solution and the method of synthesis employed on the textural and chemical properties of the final materials was evaluated. It was found that both methods produce tailored carbon xerogels depending on the initial pH and that the pores of the carbon xerogels become larger as the initial pH decreases. High pHs result in exclusively microporous carbon xerogels, while a decrease in the amount of NaOH added, i.e. lower pH, causes the materials to evolve firstly into micro-mesoporous samples and then into micro-macroporous carbon xerogels. The main difference between the two heating methods studied, apart from the duration of the synthesis (i.e. approximately 5 h for the microwave-assisted synthesis as opposed to several days by conventional methods) lies in the meso-macroporosity of the resulting materials, since microwave radiation produces mainly mesoporous carbon xerogels with a specific mesopore size over a wider range of pH than conventional synthesis. For example, the pH range for mesoporous

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Author

E.G. Calvo; E.J. Juárez-Pérez; J.A. Menéndez; A. Arenillas

Publisher

Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 0021-9797)

Published

2011

Language

EN

Field

Chemistry (Physical Sciences)