Synthesis of large pore sized mesoporous carbon using alumina-templated strategy for high-performance RhB removal

Abstract

Abstract The mesoporous carbon dye adsorption materials were synthesized through a simple alumina-templated strategy. The morphology and structure were characterized by Xray diffraction, transmission electron microscopy, nitrogen adsorption–desorption and adsorption capacities of rhodamine B (RhB) were also tested. The results showed that the mesoporous carbon materials exhibit large BET surface area (1093.1\u202fm 2\u202fg −1), large pore volume (3.03\u202fcm 3\u202fg −1) and large pore size (21.9\u202fnm) due to the consistence pore structure of carbon material and the template nanosheet γ -alumina. Therefore, the mesoporous carbon had high equilibrium adsorption amounts (374.3\u202fmg\u202fg −1) and fast adsorption rate of RhB (317.8\u202fmg\u202fg −1 at 5\u202fmin). We also explore the kinetic studies of carbon materials for RhB adsorption, indicating that the kinetics module fit the pseudo-second-order kinetic model and Langmuir model for isothermal adsorption theory. This study promotes a high efficient material for RhB dye adsorption and a promising candidate for toxic dye wastewater treatments.