研究目的
To synthesize a new photocatalytic thin films TiO2/Fe2O3/chitosan by a solution casting technology for the degradation of azo coloured compounds in industrial waste water, specifically Rhodamine B.
研究成果
The TiO2/Fe2O3/chitosan nanocomposite films demonstrated high photocatalytic activity under simulated solar irradiation, achieving a 99.4% degradation rate of Rhodamine B in 120 minutes. The films also showed good stability and reusability, making them suitable for industrial wastewater treatment.
研究不足
The study focuses on the degradation of Rhodamine B under specific conditions. The applicability to other dyes or under different environmental conditions was not explored.
1：Experimental Design and Method Selection:
The TiO2/Fe2O3/chitosan nanocomposite films were prepared using a solution casting technology. The photocatalytic activity was evaluated by the degradation of Rhodamine B under simulated solar irradiation.
2：Sample Selection and Data Sources:
Rhodamine B was selected as a model azo dye. The samples were characterized by XRD, SEM, and HRTEM.
3：List of Experimental Equipment and Materials:
Titanium dioxide (TiO2), chitosan, Rhodamine B, FeNO3, glutaraldehyde, X'pert pro X-ray diffractometer, SEM (JEOL, X-650), HRTEM (JEOL), XPA photochemical reactor, 300 W xenon lamp, Agilent 8453 UV-visible spectrometer.
4：Experimental Procedures and Operational Workflow:
The nanocomposite films were prepared by dissolving chitosan in acetic acid, adding TiO2 and Fe2O3, casting on a glass plate, drying, and crosslinking with glutaraldehyde. The photocatalytic activity was tested under simulated solar irradiation.
5：Data Analysis Methods:
The concentration of Rhodamine B was calculated by its standard curves using UV-visible spectrometry.
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SEM
X-650
JEOL
Observation of surface physical morphology
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Titanium dioxide
20 nm
Tianjing Topstar Co., Ltd
Photocatalyst component
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Chitosan
Molecular weight: about 2 × 105
Henan Deda Chemical Co., Ltd
Biological matrix for immobilization of nanosized photocatalysts
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Rhodamine B
Tianjin Guangfu Chemical Reagent Co., Ltd
Model azo dye for photocatalytic degradation evaluation
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X'pert pro X-ray diffractometer
PAN Analytical
Characterization of materials by X-ray diffraction
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HRTEM
JEOL
High-resolution transmission electron microscopy imaging
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XPA photochemical reactor
XuJiang Electromechanical Plant
Photocatalytic degradation experiments
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300 W xenon lamp
Simulated solar irradiation source
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Agilent 8453 UV-visible spectrometer
Agilent
Measurement of Rhodamine B concentration
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