研究目的
To develop a novel g-C3N4/rectorite composite with high visible-light photoactivity for the efficient photodegradation of ciprofloxacin (CIP) in wastewater treatment.
研究成果
The g-C3N4/rectorite composite demonstrated enhanced photocatalytic activity and reusability for the degradation of CIP under visible light. The composite's improved performance is attributed to the effective separation of photogenerated electron-hole pairs and increased adsorption capacity. This study highlights the potential of g-C3N4/rectorite composites as cost-effective and environmentally friendly materials for wastewater treatment.
研究不足
The study focuses on the degradation of CIP under visible light and may not cover the full spectrum of pollutants in wastewater. The scalability and long-term stability of the composite in real-world applications require further investigation.
1:Experimental Design and Method Selection:
The study involved the synthesis of g-C3N4/rectorite composite via a two-step process consisting of wet-chemical and calcination processes. The photocatalytic activity was evaluated under visible light irradiation.
2:Sample Selection and Data Sources:
Ciprofloxacin (CIP) was used as the target pollutant to evaluate the photoactivity of the synthesized catalysts.
3:List of Experimental Equipment and Materials:
Materials included rectorite, dicyandiamide, CIP, and other chemicals. Equipment included XRD, SEM, PL spectrophotometer, FTIR spectrometer, UV-vis spectrophotometer, and nitrogen adsorption-desorption isotherm analyzer.
4:Experimental Procedures and Operational Workflow:
The synthesis process involved dispersing dicyandiamide in deionized water, adding rectorite, stirring, and then calcining. Photocatalytic activity was assessed by measuring the degradation rate of CIP under visible light.
5:Data Analysis Methods:
The degradation rate of CIP was calculated using UV-vis spectrophotometry. The photocatalytic mechanism was investigated through free radical experiments and ESI-MS analysis.
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X-ray powder diffraction
XRD
Bruker
Characterization of crystalline phase and structure
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Scanning electron microscopy
S-4800 SEM
Hitachi
Investigation of surface character and morphology
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Fluorescence spectrophotometer
F-7000 PL
Hitachi
Measurement of photoluminescence spectra
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Fourier transformed infrared spectrometer
Nicolet iS10
Thermo Fisher Scientific
Analysis of FTIR spectra
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Electrospray ionization mass spectrometry
ESI-MS, micrOTOF-Q II
Bruker
Determination of possible intermediates from CIP degradation
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UV-vis spectrophotometer
UV-9000s
Shanghai Metash Instruments Co.
Measurement of reflectance spectra
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Nitrogen adsorption-desorption isotherm analyzer
JW-BK
JWGB Sci. &Tech
Assessment of BET surface area and pore size distribution
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Xenon lamp
BL-GHX-V
Shanghai Bilang plant
Visible light source for photocatalytic activity evaluation
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