研究目的
To fabricate and evaluate nano-sized BiVO4/InVO4/g-C3N4 photocatalysts for efficient degradation of Acid Blue 92 azo dye under visible light.
研究成果
The BiVO4/InVO4/g-C3N4 nanocomposite showed superior photocatalytic activity for AB92 degradation under visible light, attributed to better particle dispersion and extended electron-hole pair lifetime due to band edge potentials, suggesting potential for environmental remediation applications.
研究不足
The study is limited to specific synthesis conditions and materials; scalability and real-world application in wastewater treatment may require further optimization. The use of a single dye (AB92) and light source may not represent all environmental conditions.
1：Experimental Design and Method Selection:
The study involved synthesizing BiVO4/InVO4 and BiVO4/InVO4/g-C3N4 composites using hydrothermal and ultrasonic-assisted hydrothermal methods, respectively, to enhance photocatalytic activity for dye degradation under visible light.
2：Sample Selection and Data Sources:
Materials included melamine, In(NO3)
3：xH2O, Bi(NO3)xH2O, NH4VO3, and Acid Blue 92 dye, with deionized water and chemicals from specified suppliers. List of Experimental Equipment and Materials:
Equipment included an ultrasonic bath, teflon-lined steel autoclave, furnace, X-ray diffractometer (Philips X'pert), scanning electron microscope (Hitachi S4160), UV-Vis spectrophotometers (Avantas TES 2048 and Sepcord S600), and a 250 W mercury lamp. Materials were sourced from Aldrich and Iran Colour Research Centre.
4：Experimental Procedures and Operational Workflow:
Synthesis involved dissolving and mixing precursors, adjusting pH, hydrothermal treatment, washing, and drying. Photocatalysis experiments involved suspending catalyst in dye solution, stirring in dark for adsorption equilibrium, irradiating with visible light, sampling, centrifuging, and measuring dye concentration.
5：Data Analysis Methods:
Data were analyzed using XRD for crystal structure, SEM for morphology, UV-Vis spectroscopy for optical properties, and first-order kinetics for degradation rates.
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Scanning electron microscope
S4160
Hitachi
Characterizing morphology and particle size of samples
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X-ray diffractometer
X'pert
Philips
Determining crystal structures of samples using Cu Kα radiation
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UV-Vis spectrophotometer
TES 2048
Avantas
Recording UV-Vis diffuse reflectance spectra
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UV-Vis spectrophotometer
Sepcord S600
Determining concentration of AB92 dye
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Mercury lamp
Providing visible light irradiation for photocatalysis experiments
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Ultrasonic bath
Assisting in synthesis by submerging and sonicating suspensions
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Teflon-lined steel autoclave
Used for hydrothermal synthesis at high temperatures and pressures
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Furnace
Heating melamine for g-C3N4 synthesis
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