Competition balance between mesoporous self-assembly and crystallization of zeolite: A key to the formation of mesoporous zeolite

► A mesoporous zeolite has been synthesized. ► The competition balance between mesoporous and zeolite phases was the key. ► A narrow pH value range of 11.10-11.30 was suitable for the synthesis. ► The material shows perfect crystallization of zeolite and high surface area. ► The mesoporous zeolite showed excellent catalytic activity.