研究目的
Investigating the effects of hydrothermal treatment duration on the morphology of WO3 nanostructures synthesized via a simple wet chemical hydrothermal method.
研究成果
The duration of hydrothermal treatment significantly affects the morphology and phase composition of WO3 nanostructures. Optimal conditions for producing urchin-like nanostructures with large surface areas were found to be 12 h of treatment at 120 °C. Beyond this duration, the nanostructures aggregated into larger particles.
研究不足
The study is limited to the effects of hydrothermal treatment duration on WO3 nanostructure morphology under fixed other conditions. The concentration of the capping agent (NaCl) was not varied, which could also influence the morphology.
1：Experimental Design and Method Selection:
A simple wet chemical hydrothermal method was employed to synthesize WO3 nanostructures at 120 °C with varying hydrothermal treatment times (1, 6, 12, and 48 h).
2：Sample Selection and Data Sources:
Sodium tungstate (Na2WO4 · 2H2O) was used as the precursor material. The morphology and structure of the synthesized WO3 samples were characterized by SEM and XRD.
3：List of Experimental Equipment and Materials:
Te?on-lined stainless steel autoclave, scanning electron microscope (COXEM CX-100), X-ray diffractometer.
4：Experimental Procedures and Operational Workflow:
The precursor was dissolved in deionized water, HCl was added to adjust pH to 2.0, the mixture was stirred, transferred into an autoclave, and heated to 120 °C for various times. The product was washed, dried, and analyzed.
5：0, the mixture was stirred, transferred into an autoclave, and heated to 120 °C for various times. The product was washed, dried, and analyzed.
Data Analysis Methods:
5. Data Analysis Methods: XRD patterns were analyzed to determine the phase composition and structure of the WO3 samples. SEM images were used to observe the morphology of the nanostructures.
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