研究目的
Investigating the optimal electrodeposition time for CdS/TiO2 nanotube-array composite photocatalysts to achieve the highest photocatalytic activity under UV-visible light irradiation.
研究成果
The CdS/TiO2 composite photocatalyst with a 3 min deposited time shows the best photoelectrochemical performance and photocatalytic activity under UV-visible light irradiation, indicating an optimal deposition time for highest activity.
研究不足
The study is limited to the optimization of electrodeposition time for CdS/TiO2 composites and does not explore other parameters that might affect photocatalytic activity.
1：Experimental Design and Method Selection:
Titania nanotube arrays were prepared by titanium anodizing, followed by CdS deposition via AC electrodeposition for varying times.
2：Sample Selection and Data Sources:
Commercially pure titanium foil was used as the substrate.
3：List of Experimental Equipment and Materials:
Direct-current power-supply system, SEM, XRD, UV-visible spectrophotometer, electrochemical workstation.
4：Experimental Procedures and Operational Workflow:
Titanium foil was anodized, followed by CdS electrodeposition, characterization, and photocatalytic activity assessment.
5：Data Analysis Methods:
SEM and XRD for morphology and crystal structure, UV-visible absorption spectra and photocurrent measurements for photoelectrochemical properties, degradation of methyl orange for photocatalytic activity.
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SEM
HITACHI S-4700
HITACHI
Characterization of morphology
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UV-visible spectrophotometer
UV-2550
Shimadzu
Measurement of UV-visible absorption and transmittance spectra
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titanium foil
99.9 % purity, 20 mm × 30 mm × 0.1 mm
Substrate for TiO2 nanotube arrays preparation
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direct-current power-supply system
Anodizing titanium foil
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XRD
Philips PC-APD
Philips
Characterization of crystal structure
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electrochemical workstation
CHI660B
China
Photoelectrochemical test
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Xe lamp
500 W
Shanghai Lansheng electron Co., Ltd.
Light source for photoelectrochemical test and photocatalytic activity assessment
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