研究目的
Investigating the fabrication and photocatalytic activity of Cu2O-TiO2 NTA heterojunction films under visible light.
研究成果
The study successfully demonstrated a novel and facile method to prepare Cu2O-TiO2 NTA heterojunction films with visible-light photocatalytic activity. The photocatalytic efficiency increased with the Cu2O content, indicating the potential for environmental and energy-related applications.
研究不足
The solubility limit of Cu(Ac)2 in aqueous solution restricts the maximum Cu2O content that can be loaded onto TiO2 NTAs. High temperatures during thermal decomposition can negatively affect the tubular structure of TiO2 NTAs.
1：Experimental Design and Method Selection
The study used a simple thermal decomposition process to fabricate Cu2O-TiO2 NTA heterojunction films. Anodic TiO2 NTAs served as both 'nano-container' and 'nano-reactors' for loading and synthesizing Cu2O nanoparticles.
2：Sample Selection and Data Sources
TiO2 NTAs were prepared by anodic oxidation method. Cu2O was loaded onto TiO2 NTAs by immersing them in cupric acetate (Cu(Ac)2) solutions of varying concentrations (0.05 to 0.3 mol/L).
3：List of Experimental Equipment and Materials
SEM (JSM-7000F, JEOL Inc.), EDS, XRD (D/max-2400, Rigaku), UV-vis spectrometry (Ultrospec 2100 pro), spectrophotometer, and an atmosphere-sintering furnace of N2.
4：Experimental Procedures and Operational Workflow
1. Preparation of TiO2 NTAs by anodic oxidation. 2. Loading of Cu2O onto TiO2 NTAs by immersion in Cu(Ac)2 solution and thermal decomposition at 400°C. 3. Characterization of the heterojunction films by SEM, EDS, XRD, and UV-vis spectrometry. 4. Evaluation of photocatalytic activity by degrading methyl orange (MO) under visible light.
5：Data Analysis Methods
Photocatalytic activity was evaluated by measuring the degradation efficiency of MO using a spectrophotometer. The degradation efficiency was calculated based on the Beer-Lambert law.
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