Nanoscale zeolites are zeolites with particle sizes in the nanometer range, typically less than 100 nm. They retain the intrinsic properties of conventional zeolites, such as thermal stability, high surface area, and uniform pore distribution, but their reduced particle size enhances their performance in various applications. The nanoscale dimension increases the external surface area, which in turn improves the accessibility of active sites for catalytic reactions and adsorption processes.