Dual soft-templated congenerous assembly to raspberry-shaped mesoporous carbon nanoparticles with hierarchical mesopores

摘要

The mesoporous carbon materials with asymmetrical architecture, small particle size (<100 nm) and large pore size, are highly desired but few reports have been covered to fabricate these materials. Here, we developed a facile and novel strategy to synthesize the unique raspberry-shaped N-doped mesoporous carbon nanoparticles (NMCNs) via a dual soft-templated congenerous assembly strategy in one pot for the first time. In this synthesis, the mesoporous carbon nanoparticles can be transformed from raspberry-like to spherical via regulating the amount of F127. The oleic acid, hydrolyzed by sodium oleate (SO) under acidic condition, can serve as porogen to create the hierarchical mesopores for the as-derived samples. Significantly, the raspberry-shaped N-doped mesoporous polymer nanoparticles (NMPNs) treated with saturated sodium chloride solution can avoid the over cross-linking and the collapse of mesostructure during carbonization, which can provide a paradigm for protecting the polymer nanoparticles synthesized in the emulsion system. Especially, the as-synthesized raspberry-shaped NMCNs with asymmetrical architecture, small particle size (86 nm) and large pore size (6.8 nm), possess extremely low cytotoxicity, can be ingested by living cells and work well in drug adsorption/release as a drug carrier, which endow them with a promising prospect in the biomedical field.