研究目的
To synthesize CeO2 nanoboxes with well-defined hollow structure and evaluate their photocatalytic activity under visible light irradiation.
研究成果
CeO2 nanoboxes with well-defined hollow structure were successfully synthesized and exhibited good photocatalytic activity for the degradation of AO 7 under visible light irradiation. The method based on Pearson’s principle offers a novel approach for fabricating hollow nanostructures with potential applications in catalysis, sensor, and fuel cell.
研究不足
The study focuses on the synthesis and photocatalytic activity of CeO2 nanoboxes under visible light irradiation, but does not explore their performance under other conditions or compare with other photocatalytic materials extensively.
1：Experimental Design and Method Selection:
The CeO2 nanoboxes were synthesized by template-engaged coordinating etching of Cu2O cubes based on Pearson’s hard and soft acid-base principle.
2：Sample Selection and Data Sources:
Cu2O cubes were used as sacrificial templates, and Na2S2O3 as the coordinating etchant in a water/ethanol system with the presence of surfactant.
3：List of Experimental Equipment and Materials:
Cu2O templates, Na2S2O3, Ce(NO3)3·6H2O, polyvinyl pyrrolidone (PVP), ethanol, double distilled water.
4：Experimental Procedures and Operational Workflow:
Cu2O templates were dispersed into ethanol/water mixed solvent containing PVP, followed by dissolving Ce(NO3)3·6H2O. Na2S2O3 solution was added, and the mixture was stirred until color changed. Products were collected by rinse-centrifugation cycles and calcinated to obtain CeO2 nanoboxes.
5：2O. Na2S2O3 solution was added, and the mixture was stirred until color changed. Products were collected by rinse-centrifugation cycles and calcinated to obtain CeO2 nanoboxes. Data Analysis Methods:
5. Data Analysis Methods: The photocatalytic activity was evaluated by photodegradation of AO 7 under visible light irradiation, and the degradation rate was determined with a UV-visible spectrophotometer.
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