Abstract
Poly(furfuryl alcohol) was introduced into a pore system of MCM-48 silica by the precipitation polycondensation of furfuryl alcohol (FA). The complete filling of the pores without the deposition of significant amounts of polymer on the external surface of MCM-48 was obtained at the FA/MCM-48 mass ratio close to 1.0. The final structure of carbon replica was formed by subsequent carbonization and extraction of SiO2 with HF. The carbonization temperature strongly influenced the surface composition of the formed carbon replicas. The highest catalytic activity in the oxidative dehydrogenation of ethylbenzene was observed for CMK-1 with the highest concentration of phenol and carbonyl groups, recognized as active sites of the studied reaction.
Highlights
Porous carbon materials, especially activated carbons (ACs), offer a variety of prospective applications in catalysis, separation, purification or energy and gas storage [1,2,3,4,5,6,7,8], due to highly developed specific surface area, susceptibility to chemical modifications, availability of technologies of large-scale synthesis as well as environmentally friendly character
In order to determine the efficiency of poly(furfuryl alcohol) deposition in the MCM-48 pore system, thermogravimetric measurements were performed
The determined mass of remaining silica template allowed to calculate the contribution of organic part in the PFA/MCM-48 composites after subtraction of mass loss attributed to desorption of physically adsorbed water
Summary
Especially activated carbons (ACs), offer a variety of prospective applications in catalysis, separation, purification or energy and gas storage [1,2,3,4,5,6,7,8], due to highly developed specific surface area, susceptibility to chemical modifications, availability of technologies of large-scale synthesis as well as environmentally friendly character. The main concept of synthesis of OMCs is based on replication of structure of a soft or hard template using a carbon precursor [15]. The CMK-type materials (Carbon Mesostructured by KAIST), developed by Ryoo et al [16], with various types of carbon mesoporous replicas (e.g. CMK-1, CMK-2, CMK-3 or CMK-6) synthesized using the silica template with the strictly defined pore structure (MCM-48, SBA-1, SBA-15 or SBA-16, respectively) are the most important family belonging to OMCs. The pore architecture of the silica template determines the spatial arrangement of final carbon material and the method of carbon precursor deposition as well. The synthesis of CMK-1 carbon replicas by precipitation polycondensation of furfuryl alcohol (being the carbon precursor) in the pore system of MCM-48 silica, followed by carbonization of the resulting composite and SiO2 extraction, was developed. The obtained materials were tested as catalysts of ODH, which involves carbonyl/quinone surface groups
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
