研究目的
To prepare and characterize SiO2@ZnO core-shell nanospheres for photocatalytic oxidation of nitric oxides as an alternative to pure ZnO.
研究成果
The SiO2@ZnO core-shell nanospheres showed excellent photocatalytic activity over nitric oxides, with a yield of 72.9%. The material is a promising alternative to pure ZnO for air purification applications.
研究不足
The study focused on the photocatalytic activity over nitric oxides and did not explore other potential applications or pollutants. The process optimization was complex due to ZnO's solubility at high pH values.
1：Experimental Design and Method Selection:
The study involved a three-step process for preparing SiO2@ZnO core-shell nanospheres, including silica core preparation, surface modification, and ZnO shell formation via precipitation.
2：Sample Selection and Data Sources:
Silica cores were prepared via hydrolysis-condensation reactions, and ZnO was precipitated using zinc nitrate hexahydrate and Trilon P.
3：List of Experimental Equipment and Materials:
High-resolution Transmission Electron Microscope (HRTEM, JEOL 2100 HR), Nicolet Magna-IR Spectrometer 550, Bruker D8 Focus diffractometer, Micromeritics ASAP 2000 apparatus, UV–vis spectrophotometer Hitachi U-
4：Experimental Procedures and Operational Workflow:
30 Silica cores were calcined and chemically modified before ZnO precipitation. The suspension was dried and calcined to form the core-shell structure.
5：Data Analysis Methods:
XRD, FTIR, TEM, BET surface area analysis, and diffuse reflectance spectroscopy were used for characterization.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
