研究目的
To construct an ordered nanoporous embedding nanoparticles composite by anodic oxidation of Ti3SiC2, investigate its photoelectrochemical properties, and compare it with anodized Ti to enhance photocurrent and capacitance.
研究成果
The anodized Ti3SiC2 forms a TiO2/C/SiO2 composite with enhanced photoelectrochemical properties, including higher photocurrent and capacitance compared to anodized Ti, due to nanostructure and composition, showing promise for bifunctional materials.
研究不足
The influence of processing parameters on microstructures and components distribution of the anodized Ti3SiC2 are still unclear, and the optical and capacitance performance have hardly been studied. Potential optimization in anodization conditions and scalability.
1：Experimental Design and Method Selection:
Anodic oxidation of Ti3SiC2 in fluorine-containing organic electrolyte to form nanostructured TiO2/C/SiO2 composite, with comparison to anodized Ti. Use of various characterization and electrochemical testing methods.
2：Sample Selection and Data Sources:
Ti discs and Ti3SiC2 discs prepared from powders, anodized under controlled conditions.
3：List of Experimental Equipment and Materials:
Ti disc, TiC, Ti, Si powders, ethylene glycol, ammonium fluoride, acetone, ethanol, deionized water, argon gas, etc.
4：Experimental Procedures and Operational Workflow:
Preparation of Ti3SiC2 billets by ball-milling and hot-pressing, polishing, anodic oxidation at specific voltages and times, annealing, ultrasonic cleaning, followed by SEM, TEM, XRD, XPS, UV-vis DRS, and photoelectrochemical measurements.
5：Data Analysis Methods:
Use of software for EIS analysis (ZSimpwin), calculation of bandgap from UV-vis data, and statistical analysis of electrochemical properties.
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Field Emission Scanning Electron Microscope
SU-8010
Hitachi
Observing surface morphology
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Transmission Electron Microscope
Tecnai G2 F20
FEI
Taking TEM images, TEM-EDS elemental mapping, HRTEM images
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X-ray Diffractometer
DMAX-2400
Rigaku
Identifying crystallographic phases
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Digital Multimeter
34464A
Agilent
Recording current-time curves
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UV-Vis Spectrophotometer
UV 2700
Shimadzu
Testing UV–vis diffuse reflection spectrum
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X-ray Photoelectron Spectrometer
Krato Axis Ultra DLD
Kratos Analytical
Assessing chemical composition and oxidation states
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Electrochemical Workstation
CHI660E
Shanghai Chenhua
Performing photoelectrochemical measurements, cyclic voltammetry, galvanostatic charge-discharge, electrochemical impedance spectroscopy
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Xe Arc Lamp
Not specified
Shanghai Jiguang Special Lighting company
Providing visible light irradiation for photocurrent testing
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Direct Current Power Supply
IT6833
ITECH
Supplying voltage for anodic oxidation
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