研究目的
Investigating the synthesis and properties of Zn1-xCoxO and Zn1-xCoxO@SiO2 as green pigments, focusing on their crystallographic structure, UV?visible properties, and chemical stability.
研究成果
The polyol synthesis route successfully produces nanometric Zn1-xCoxO with a wide range of cobalt concentrations, enabling the production of various green pigments. The SiO2 coating enhances chemical stability and reduces toxicity, making these pigments suitable for practical applications.
研究不足
The study focuses on the synthesis and initial characterization of Zn1-xCoxO and Zn1-xCoxO@SiO2, with limited discussion on long-term stability and practical application challenges.
1：Experimental Design and Method Selection
Polyol co-precipitation route for Zn1-xCoxO synthesis and sol-gel process for SiO2 coating.
2：Sample Selection and Data Sources
Zinc acetate dihydrate and cobalt nitrate as precursors, diethylene glycol as template.
3：List of Experimental Equipment and Materials
Philips PW 1820, PANalytical X’Pert instrument for XRD; Varian ICP-OES 720ES for ICP measurements; Jeol-6700F SEM for SEM; JEOL JSM-6700F TEM for TEM; Varian Cary 5000 UV-Vis-NIR spectrophotometer for diffuse reflectance measurements.
4：Experimental Procedures and Operational Workflow
Heating mixture to 180 °C for 1 h, centrifugation, washing with ethanol, drying at 80 °C. TEOS hydrolysis-condensation for SiO2 coating.
5：Data Analysis Methods
Full pattern matching using Fullprof? program package for XRD; ICP for chemical composition; SEM and TEM for morphology; UV-Vis-NIR for optical properties.
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