研究目的
To develop an efficient visible-light-responsive photocatalyst by fabricating hybrid TiO2-Ag3PO4 nanorods for enhanced photocatalytic degradation of pollutants like 2-propanol under visible light.
研究成果
The TiO2-Ag3PO4 heterostructured nanorods, particularly with 13% Ag3PO4 loading, exhibit superior visible-light-driven photocatalytic performance due to enhanced surface area, visible light absorption, and charge separation, providing an effective strategy for developing efficient photocatalysts.
研究不足
The synthesis of brookite TiO2-based heterojunctions is limited by difficult techniques; Ag3PO4 has inherent fast charge recombination and poor photostability; excessive Ag3PO4 loading leads to aggregation and reduced photocatalytic activity.
1：Experimental Design and Method Selection:
The study uses a hydrothermal method to synthesize brookite TiO2 nanorods and a precipitation method to load Ag3PO4 nanoparticles, aiming to create heterostructures that enhance visible light absorption and charge separation.
2：Sample Selection and Data Sources:
Samples include pristine brookite TiO2 nanorods, pure Ag3PO4 nanoparticles, and hybrid TiO2-Ag3PO4 nanorods with varying molar percentages of Ag3PO4 (
3：9%, 8%, 13%, 23%, 5%). List of Experimental Equipment and Materials:
Reagents from Chongqing Chemical Company; equipment includes XRD (MiniFlex II, Rigaku Co.), SEM, UV-vis spectrometer (UV-2500PC, Shimadzu), BET surface area analyzer (Quantachrome Nova 4200e), and gas chromatography (Agilent Technologies, 3000A micro-GC).
4：Experimental Procedures and Operational Workflow:
Hydrothermal synthesis of TiO2 nanorods at 230°C for 48h; precipitation method for Ag3PO4 loading with stirring under dark; photocatalytic testing with visible light (100 mW cm-2) from a Xenon lamp with Yellow-44 filter, measuring acetone and CO2 production over time.
5：Data Analysis Methods:
XRD for crystal phase identification, SEM for morphology, UV-vis for optical absorption, BET for surface area, and gas chromatography for quantifying degradation products.
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X-ray diffraction instrument
MiniFlex II
Rigaku Co.
Characterize the crystal phases of products
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UV-vis spectrometer
UV-2500PC
Shimadzu
Measure UV-vis patterns
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Gas chromatography
3000A micro-GC
Agilent Technologies
Evaluate the amount of acetone and CO2 during photocatalytic process
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BET surface area analyzer
Nova 4200e
Quantachrome
Characterize Brunauer-Emmett-Teller surface area
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Xenon lamp
Provide visible light source for photocatalytic testing
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