Product Name
Name:a>Ceria oxide nanoparticles
Product Overview
Diamond has extremely high chemical stability and almost does not react with most chemical substances at normal temperature and pressure. Diamond nanosheets also have good chemical stability, mainly due to the strong covalent bonds between carbon atoms in their crystal structure. This chemical stability enables diamond nanosheets to maintain the stability of their structure and properties in a variety of harsh chemical environments. For example, in corrosive media such as strong acids, strong alkalis or strong oxidants, diamond nanosheets are usually not easily corroded or decomposed. CVD is a common method for preparing diamond. In the CVD process, carbon-containing gases (such as methane, acetylene, etc.) are usually used as carbon sources, and under certain temperature, pressure and atmosphere conditions, diamond nanosheets are deposited on the substrate through chemical reactions. For example, in the hot wire CVD method, by heating a metal wire such as tungsten or tantalum wire to a high temperature (about 2000-2500 ° C), the carbon source gas is decomposed and diamond is deposited on the substrate.
By adjusting the parameters in the CVD process, such as the type and flow of carbon source gas, deposition temperature, pressure, substrate material, etc., the size, shape and quality of diamond nanosheets can be controlled. The liquid phase ultrasonic stripping method is a common method to prepare diamond nanosheets. The bulk diamond is dispersed in a suitable solvent, and then the diamond crystal is stripped in the solvent by ultrasonic treatment to form diamond nanosheets. Common solvents are surfactant aqueous solution, organic solvent and so on. In the ultrasonic process, the ultrasonic energy will produce a cavitation effect in the solvent, and the local high pressure and high temperature generated by this cavitation effect can destroy the interlayer force of the diamond crystal and promote the formation of nanosheets.
Technical Parameter
Particle size:0-55nm(TEM)
Appearance:/span>Milk white dispersion
Zeta potential: ~20 mV
Product Features
Size effect: The nanometer size gives cerium dioxide particles high specific surface area and special surface properties, which makes the surface active sites increase and the reactivity increase.
Oxidizing reducibility: Cerium dioxide has a high REDOX activity and the reversibility of its oxidation state, which gives it a unique advantage in the field of catalysts and oxidants.
Stability: Cerium dioxide nanoparticles have good stability under certain conditions and are not easy to decompose or denature.
Biocompatibility: Cerium dioxide nanoparticles show good biocompatibility in the biomedical field and are suitable for drug delivery, bioimaging and other applications.
Application Fields
Catalyst: Cerium dioxide nanoparticles have important applications in automotive exhaust gas treatment, chemical reaction catalysis and energy conversion. Its high REDOX activity significantly improves the performance of the catalyst.
Antioxidants: In the biomedical field and material modification, cerium dioxide nanoparticles act as antioxidants to effectively fight free radical damage and protect cell and tissue health.
Gas sensor: Using its unique sensing performance, cerium dioxide nanoparticles can be used to detect harmful gases such as carbon monoxide and hydrogen to improve environmental monitoring and safety protection.
Fuel cells: As the electrolyte material of solid oxide fuel cells, the oxygen ion conductivity of cerium dioxide nanoparticles helps to improve the performance and efficiency of fuel cells.
Electronic ceramics: In the field of electronic ceramics, nano-cerium dioxide can effectively improve the finish and density of ceramics, and improve their physical properties.
Related Information
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