研究目的
To develop a green synthesis method for BiVO4 nanoparticles using lemon juice as fuel and evaluate their photocatalytic activity for dye degradation and electrochemical performance for heavy metal detection.
研究成果
BiVO4 nanoparticles with flower-like morphology were successfully synthesized using a green method. They exhibited excellent photocatalytic activity for Indigo Carmine degradation and good electrochemical performance for Hg(II) detection, with a detection limit of 3.5 ppb, making them promising for environmental applications.
研究不足
The synthesis may have impurities from organic fuel, and the photocatalytic efficiency could be affected by dye concentration and catalyst loading. Electrochemical detection might be influenced by electrode surface conditions.
1：Experimental Design and Method Selection:
Solution combustion method was used for synthesis, involving an exothermic redox reaction between bismuth nitrate (oxidizer) and lemon juice (fuel).
2：Sample Selection and Data Sources:
BiVO4 nanoparticles were synthesized with varying fuel ratios (
3：5mL and 5mL lemon juice). List of Experimental Equipment and Materials:
Bismuth nitrate, lemon juice, Indigo Carmine dye, mercury(II) ions, and various analytical instruments including PXRD, FTIR, DRS, PL, SEM, TEM, and electrochemical setup.
4：Experimental Procedures and Operational Workflow:
Synthesis involved mixing oxidizer and fuel, combustion, and characterization. Photocatalytic tests under visible light with a 300W mercury lamp, and electrochemical tests using cyclic voltammetry and differential pulse anodic stripping voltammetry.
5：Data Analysis Methods:
XRD data analyzed using Scherer formula for crystallite size, UV-DRS for band gap via Tauc plot, and kinetic analysis using Langmuir-Hinshelwood model for degradation rates.
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Powder X-ray diffractometer
Characterization of crystal structure and phase identification of BiVO4 nanoparticles.
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Fourier Transform-Infrared spectroscopy
Analysis of functional groups and chemical bonds in BiVO4 nanoparticles.
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Diffused Reflectance Spectroscopy
Measurement of optical properties and band gap estimation.
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Photoluminescence Spectroscopy
Study of charge carrier recombination and defects in BiVO4 nanoparticles.
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Scanning Electron Microscopy
Imaging of morphology and surface structure of BiVO4 nanoparticles.
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Transmission Electron Microscopy
High-resolution imaging and size analysis of BiVO4 nanoparticles.
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Cyclic Voltammetry
Electrochemical characterization for Hg(II) detection.
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Differential Pulse Anodic Stripping Voltammetry
Sensitive electrochemical detection of Hg(II) ions.
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Mercury lamp
300W
Light source for photocatalytic degradation experiments.
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