The study of Ti doped ZSM-5 particles and cavities inside them

The TEM study of titanium contained ZSM-5 zeolite before and after hydrothermal treatment was performed. The use of different TEM techniques - such as conventional TEM, HRTEM and EDX line scans provides important information about the zeolite catalyst consisting from several phases. The hydrothermal treatment of zeolite powder leads to strong changes in the morphology of the constituting particles. They are characterised by a homogeneous structure before hydrothermal treatment while the occurrence of holes after thermal treatment was observed. These changes lead to the enrichment of zeolite with titanium that enhance its catalytic activity. Some of the titanium surplus precipitates as TiO2 anatase nanoparticles within the holes.