研究目的
Investigating the synthesis of silver pyrovanadate, Ag4V2O7, nanoplates with exposed {0 0 1}-facets by a facile, additive-free hydrothermal method and evaluating their photocatalytic activity under solar light irradiation.
研究成果
Single-phase silver pyrovanadate, Ag4V2O7, nanoplates were successfully synthesized by an additive-free hydrothermal method. The photocatalytic activity of the c-axis-oriented Ag4V2O7 sample was significantly higher than that of the random-oriented sample, attributed to their exposed {0 0 1}-facets. This work provides a novel approach to synthesizing faceted nanophotocatalysts of silver vanadate without using any additives.
研究不足
The study is limited to the synthesis and photocatalytic evaluation of Ag4V2O7 nanoplates under specific conditions. The scalability and practical application of the method need further investigation.
1：Experimental Design and Method Selection:
The synthesis of Ag4V2O7 nanoplates was performed using a hydrothermal method without additives. The effect of ammonia as a complexing agent was investigated.
2：Sample Selection and Data Sources:
NH4VO3 and AgNO3 were used as starting materials. The samples were characterized by X-ray powder diffraction, high-resolution transmission electron microscopy, field-emission scanning electron microscopy, and UV-Vis diffuse reflectance spectrometry.
3：List of Experimental Equipment and Materials:
Bruker D8 Advance diffractometer, JEOL 2100 HRTEM, Hitachi S-4800 FE-SEM, JASCO V670 UV-Vis spectrophotometer, solar simulator (Model: 69907, Newport).
4：Experimental Procedures and Operational Workflow:
The reaction mixture was hydrothermally treated at temperatures ranging from 100 to 220°C for 4 h. The samples were then filtered, washed, and dried.
5：Data Analysis Methods:
The photocatalytic activity was evaluated by the degradation of rhodamine B under solar light irradiation. The degradation efficiency was determined using a Shimadzu UV-1800 spectrophotometer.
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