A5021191465- TiO2 Photocatalysis and Solar Cells
- Advanced Photocatalysis Techniques
- Polyoxometalates: Synthesis and Applications
- Gas Sensing Nanomaterials and Sensors
- ZnO doping and properties
- Mesoporous Materials and Catalysis
- Microwave Dielectric Ceramics Synthesis
- Catalytic Processes in Materials Science
- Magnesium Oxide Properties and Applications
- Layered Double Hydroxides Synthesis and Applications
Vidyasirimedhi Institute of Science and Technology
2021-2025
ZnO/SiO2 core/shell particles were prepared by the hydrolysis and condensation of tetraethyl orthosilicate on ZnO nanoparticles (particle size ca. 50–200 nm) nanorods (diameter 124 nm length 400–950 nm). The silica shell thickness was varied (28 to 40 adjust composition (Si/Zn ratio) reiterating coating procedure. Heat treatment nanoparticle/SiO2 with suitable stoichiometry ratio 0.5) at 1000 °C resulted in formation single-phase Zn2SiO4 as hollow particles. use different morphologies (ZnO...
A homogeneous thin silica layer with the thickness of a few nanometers was successfully deposited on an anatase particle by hydrolysis and condensation tetraethyl orthosilicate. The heat treatment titania/silica hybrid at 1000 °C led to densification particles. after coating did not transform rutile, no change in crystallite size seen °C. subsequent heating were repeated vary obtain each similar procedure (ca. 3 2 nm, before treatment). samples evaluated for photocatalytic decomposition...
Anatase/silica core/shell particles were prepared by the hydrolysis and condensation of tetraethyl orthosilicate on anatase with sizes 9, 22, 111 nm, respectively. The thickness silica layer was designed from ca. 3 to 14 nm repeating coating procedure a particle size 22 nm. By heat treatment at 1000 °C, though pristine transformed rutile, remained for silica-coated particles. Anatase (111 nm) rutile upon heating 1100 while transformation not observed smaller (9 nm). With increase did...
Well-defined Mg(OH)2 (brucite) hexagonal platy particles with the lateral size of 80 nm were prepared by precipitation from an aqueous solution magnesium chloride using a flow reactor controlled pressure injection. The brucite coated thin silica layer hydrolysis and condensation tetraethyl orthosilicate (TEOS) catalyzed ammonium hydroxide to obtain Mg(OH)2@SiO2 core-shell nanoparticle. heat treatment in air at 500 °C resulted transformation periclase MgO. MgO cores removed [email protected]2...