TPABr-grafted MWCNT as bifunctional template to synthesize hierarchical ZSM-5 zeolite

Tailoring the pore size and network connectivity of the hierarchical zeolite is still a great challenging task. Herein, a method was developed to synthesize high pore connectivity hierarchical ZSM-5 by using a novel bifunctional template, TPABr-grafted MWCNT. By this method we obtained the hierarchical ZSM-5 zeolite with more mesoporous structure and high ratio of Bronsted to Lewis acid sites (B/L) due to the high utilization of CNT. The structure and properties of the bifunctional template and the hierarchical ZSM-5 zeolites were confirmed by thermogravimetric analysis (TGA), X-ray diffraction (XRD), Fourier transform infrared spectra (FTIR), scanning electron microscopy (SEM), N-2 adsorption and desorption (N-2-BET) and ammonia temperature programmed desorption (NH3-TPD). (C) 2017 Elsevier B.V. All rights reserved.