研究目的
To design a thin CuO film photocatalyst for visible-light-driven photocatalytic degradation of methylene blue (MB) and investigate the impacts of in-situ thermal treatment temperature and sputtering conditions on its material properties and performance.
研究成果
In-situ thermal treatment and nanocrystal engineering significantly improve the crystallinity, surface roughness, and photocatalytic performance of thin CuO films. Higher temperatures and sputtering powers enhance durability and efficiency, with sample S5 (300 °C, 300 W) showing the best performance. This approach is promising for visible-light-driven wastewater treatment applications.
研究不足
The study is limited to specific sputtering conditions and temperatures; scalability to industrial applications may require further optimization. The focus is on MB degradation, and applicability to other pollutants is not explored. The durability testing is only for 5 cycles, which may not represent long-term stability.
1：Experimental Design and Method Selection:
The study uses sputtering with concurrent in-situ thermal treatment to deposit thin CuO films on glass substrates, varying temperature and sputtering power to engineer nanocrystals and improve photocatalyst properties.
2：Sample Selection and Data Sources:
Samples S1-S5 are prepared with different deposition conditions (temperatures from room temperature to 300 °C, sputtering powers from 50 W to 300 W) as listed in Table
3：List of Experimental Equipment and Materials:
Equipment includes a sputtering system, FE-SEM, AFM, XRD (Bruker D-8 GADDS), XPS, UV-3101PC spectrophotometer, Milli-Q water purification system (Millipore Synergy 185), shaker, xenon arc lamp with AM
4：5G filter. Materials include glass substrates, IPA, nitrogen gas, CuO target, MB dye from Sigma-Aldrich-Fluka. Experimental Procedures and Operational Workflow:
Substrates are cleaned ultrasonically in IPA and dried with nitrogen. Sputtering is performed at specified pressures and powers. Characterization involves FE-SEM, AFM, XRD, XPS, optical absorption measurements. Photocatalytic experiments involve placing samples in MB solution, shaking in dark, irradiating with xenon lamp, sampling, and analyzing concentration changes.
5：Data Analysis Methods:
XRD data analyzed using Scherrer formula for crystal size, photocatalytic degradation rate calculated using Eq. (2), kinetics analyzed using first-order model (Eq. 5), IPCE and EIS measurements for performance evaluation.
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