Mesoporous silica with cubic symmetry has attracted interest from researchers for some time. In our group, we synthesized mesoporous silica nanoparticles with cubic Pm3n symmetry with very high molar ratios (>50%) of 3-aminopropyl triethoxysilane at room temperature. The synthesis is robust allowing, for example, co-condensation of organic dyes without loss of structure. By means of pore expander molecules, the pore size can be enlarged from 2.7 to 5 nm, while particle size decreases. Adding pore expander and co-condensing fluorescent dyes in the same synthesis reduces average particle size down to 100 nm.
N2 - Silicon Nanoparticles are of interests for a variety of applications, from thermoelectrics to photovoltaics. This research group has been exploring various synthetic routes to prepare organically capped Si nanoparticles from reactive Zintl phases such as NaSi. Doping NaSi with various main group and transition elements provides more complex nanoparticles. Synthesis and characterization of the NaSi starting material will be presented along with the synthesis and characterization of the resulting nanoparticles.
Solution plasma synthesis of Si nanoparticles - …
2 mL ethanol solution of NaGdF4: Yb, Er/silica nanoparticles was mixed with another 2 mL ethanol and then 1.5 mL water solution of synthesized gold nanoparticles was added with stirring. After 1 hour, particles were centrifuged out, and then redispersed either in ethanol or water for further characterization.
Bio-controlled synthesis of nanoparticles with ..
In this review, the methods of synthesis, modification and application of zinc oxide will be discussed. The zinc oxide occurs in a very rich variety of structures and offers a wide range of properties. The variety of methods for ZnO production, such as vapour deposition, precipitation in water solution, hydrothermal synthesis, the sol-gel process, precipitation from microemulsions and mechanochemical processes, makes it possible to obtain products with particles differing in shape, size and spatial structure. These methods are described in detail in the following sections ().
Synthesis of si nanoparticles from freestanding porous silicon ..
The nanoparticles are in a grid that provides high surface area for the reaction, is activated by sunlight and can work in water, making them useful for cleaning up oil spills. Researchers are using as a room temperature catalyst to breakdown volatile organic pollutants in air. are being used to clean up carbon tetrachloride pollution in ground water. Iron oxide from water wells. Researchers have used nanoparticles called nanotetrapods studded with nanoparticles of carbon to develop .
Silver Nanoparticles: Synthesis, Uses and Health Concerns
The applications of copper (Cu) and Cu-based nanoparticles, which are based on the earth-abundant and inexpensive copper metal, have generated a great deal of interest in recent years, especially in the field of catalysis. The possible modification of the chemical and physical properties of these nanoparticles using different synthetic strategies and conditions and/or via postsynthetic chemical treatments has been largely responsible for the rapid growth of interest in these nanomaterials and their applications in catalysis. In addition, the design and development of novel support and/or multimetallic systems (e.g., alloys, etc.) has also made significant contributions to the field. In this comprehensive review, we report different synthetic approaches to Cu and Cu-based nanoparticles (metallic copper, copper oxides, and hybrid copper nanostructures) and copper nanoparticles immobilized into or supported on various support materials (SiO2, magnetic support materials, etc.), along with their applications in catalysis. The synthesis part discusses numerous preparative protocols for Cu and Cu-based nanoparticles, whereas the application sections describe their utility as catalysts, including electrocatalysis, photocatalysis, and gas-phase catalysis. We believe this critical appraisal will provide necessary background information to further advance the applications of Cu-based nanostructured materials in catalysis.