研究目的
Investigating the photoelectrochemical (PEC) properties of TiO2 nanotubes by loading Ag nanoparticles into them for water splitting.
研究成果
The loading of Ag nanoparticles into the TiO2 nanotubes significantly enhances PEC properties, with the 8-cycle sample providing the best performance. This improvement is attributed to better light absorption due to plasmonic effects and improved charge separation and transport. The study suggests that there is an optimum amount of Ag-loading for maximizing PEC performance.
研究不足
The study is limited to the optimization of Ag-loading cycles for PEC activity improvement. The potential masking effect of excessive Ag-loading on light absorption and the inhibition of direct contact between the semiconductor/electrolyte are noted as areas for further optimization.
1：Experimental Design and Method Selection:
The TiO2 nanotube array was prepared by the electrochemical anodization method. The Ag nanoparticles were deposited on the TiO2 samples by the sequential chemical bath deposition (S-CBD) method with different cycles.
2：Sample Selection and Data Sources:
A Ti foil with 1 mm thickness and the size of
3：5 × 5 cm2 was used as the anode. List of Experimental Equipment and Materials:
The electrolyte solution was ammonium fluoride (
4：3 wt%), distilled water (2 ml), ethylene glycol (98 ml). The deposition of Ag nanoparticles was performed using solutions of 1 mM AgNO3 and 2 mM NaBHExperimental Procedures and Operational Workflow:
The anodization was carried out at the voltage 60 V, during 3 h. The prepared TiO2 nanotubes were annealed in the furnace for 2 h at 500 °C. The loading of the Ag nanoparticles into the TiO2 nanotubes were repeated for 6, 8, and 10 cycles.
5：Data Analysis Methods:
The PEC properties of the samples were investigated using linear sweep voltammetry, chronoamperometry, and electrochemical impedance spectroscopy.
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