What specific scenarios are nano cerium oxides of different particle sizes suitable for?

The applicable scenarios of nano cerium oxide products with different particle sizes are as follows:
Nano cerium oxide powder 10-30nm
Catalysis field: It has a large specific surface area and a high active site density, which can provide more active centers for catalytic reactions. It can effectively accelerate the oxidation reaction of harmful gases such as carbon monoxide and hydrocarbons in automobile exhaust purification and improve the purification efficiency; in some organic synthesis reactions, it can also be used as a high-efficiency catalyst to accelerate the reaction process and increase the product yield. Cosmetics field: It can be evenly dispersed in the cosmetic matrix, has a strong absorption capacity for ultraviolet rays, especially the UVB band, can effectively prevent skin sunburn and tanning, and has good visible light transmittance, will not affect the transparency and color of cosmetics, and can also reduce irritation to the skin. Electronic ceramics field: Adding it to electronic ceramic materials can significantly reduce the sintering temperature of ceramics, inhibit lattice growth, and make the microstructure of ceramics more uniform and dense, thereby improving the dielectric properties, mechanical properties and stability of electronic ceramics. It is widely used in the manufacture of ceramic capacitors, piezoelectric ceramics and other devices.

Nano cerium oxide powder 30-50nm
Semiconductor polishing field: It is an ideal polishing material in the chemical mechanical polishing (CMP) process of semiconductor chip manufacturing. It can be used for CMP polishing of silicon oxide film and shallow trench isolation layer (STI) of integrated circuit in chip manufacturing process, which can achieve efficient and uniform polishing, obtain extremely low surface roughness, and help improve the manufacturing accuracy and performance of chips.
Fuel cell field: As a fuel cell electrolyte material, it can provide higher oxygen ion conductivity under medium and low temperature conditions, and improve the performance and efficiency of fuel cells. Its particle size is conducive to forming a good interface contact between the electrode and the electrolyte, promoting the transmission of oxygen ions and the electrode reaction.
Optical glass polishing field: It has a significant polishing effect on optical glass. It can quickly remove scratches and defects on the glass surface without damaging the glass surface, so that the glass surface can achieve high flatness and finish. It is widely used in the manufacture of optical components such as camera lenses and telescope lenses.

Nano cerium oxide powder 100-200nm
Catalyst carrier field: The larger particle size gives it better mechanical strength and stability. It can be used as a catalyst carrier to load precious metals or other active components for various catalytic reactions. In the hydrogenation reaction and dehydrogenation reaction of petrochemical industry, it can provide stable support for the active components and improve the service life and stability of the catalyst.
Alloy plating field: Adding it to zinc-nickel, zinc-cobalt and zinc-iron alloy plating can change the electrocrystallization process of zinc, promote the preferred orientation of the crystal plane, make the plating structure more uniform and dense, thereby improving the corrosion resistance of the plating, and widely used in the surface protection of automotive parts, mechanical parts, etc.
Biomedical field: It has certain application potential in biomedical imaging and drug delivery. For example, it can be used as a contrast agent for magnetic resonance imaging (MRI), and its larger particle size helps to enhance the imaging signal; it can also be used to construct drug carriers to achieve targeted drug delivery, improve the therapeutic effect of drugs and reduce side effects.

Nano cerium oxide powder  larger  than 200nm
In some special ceramic fields: In some ceramic products that have relatively low requirements for density and mechanical properties of ceramic materials, but relatively loose requirements for cost and preparation process, nano cerium oxide with larger particle size can be used as an additive, which can improve the performance of ceramics to a certain extent and reduce production costs.
In the field of water purification: It can be used to treat some industrial wastewater and domestic sewage, and remove heavy metal ions, organic pollutants, etc. in water through adsorption and catalysis. The larger particle size makes it have better sedimentation performance in water, which is convenient for subsequent solid-liquid separation operations.