Controlling the particle size of catalysts can be achieved through various methods:
Precipitation: This involves mixing solutions to form solid particles. By controlling parameters such as pH, temperature, and concentration, it is possible to control the particle size. Sol-Gel Process: This is a wet-chemical technique that involves the transition of a system from a colloidal solution to a solid gel. The process parameters can be adjusted to control the size of the particles. Mechanical Milling: This method involves grinding larger particles into smaller ones. The duration and intensity of milling can be adjusted to achieve the desired particle size. Thermal Decomposition: This involves heating a precursor material to decompose it into smaller particles. The temperature and time of decomposition can be controlled to achieve the desired size. Hydrothermal Synthesis: This involves crystallizing substances from high-temperature aqueous solutions at high vapor pressures. The conditions can be tailored to control the particle size.
