研究目的
Investigating the photocatalytic degradation and antibacterial performance of GO/CN/BiOI composites under LED light.
研究成果
The GO/CN/BiOI composites demonstrated excellent photocatalytic degradation and antibacterial performance under LED light, with h+ playing a crucial role in the process. The composites show potential for application in water pollution remediation and disinfection.
研究不足
The study focused on specific pollutants (MO and TC) and bacteria (E. coli and S. aureus). The performance under different light sources or with other pollutants/bacteria was not investigated. The scalability and practical application of the composites in real-world water treatment systems were not addressed.
1：Experimental Design and Method Selection:
The study involved the synthesis of GO/CN/BiOI composites by in-situ generation route and their characterization using XRD, TEM, SEM, XPS, FT-IR, Raman, DRS, photocurrent, EIS, and LSCM. The photocatalytic degradation and antibacterial activities were evaluated under LED light.
2：Sample Selection and Data Sources:
The samples included GO/CN/BiOI composites with varying GO content. The photocatalytic degradation was tested using methyl orange (MO) and tetracycline (TC) as model pollutants, and the antibacterial activity was tested against E. coli and S. aureus.
3：List of Experimental Equipment and Materials:
Equipment used included XRD, TEM, SEM, XPS, FT-IR, Raman spectrometer, DRS, photocurrent and EIS measurement systems, and LSCM. Materials included Bi(NO3)3·5H2O, CN, GO, ethylene glycol, NaOH, KI, MO, TC, E. coli, and S. aureus.
4：Experimental Procedures and Operational Workflow:
The synthesis of GO/CN/BiOI composites involved ultrasound treatment, mixing, and drying. Photocatalytic degradation experiments were conducted under LED light, and antibacterial activities were assessed by counting bacterial colonies after treatment.
5：Data Analysis Methods:
The photocatalytic degradation efficiency was analyzed using UV–vis spectrophotometry, and the antibacterial activity was evaluated by colony counting. The mechanism was studied through trapping experiments.
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XRD
Characterization of crystal structure
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TEM
Morphology analysis
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SEM
Morphology analysis
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XPS
Surface species and chemical states analysis
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FT-IR
Characteristic functional groups analysis
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Raman
Structural features analysis
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DRS
Optical properties analysis
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Photocurrent
Separation efficiency of electrons and holes measurement
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EIS
Separation efficiency of electrons and holes measurement
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LSCM
Bacterial membrane damage verification
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LED lamp
Light source for photocatalytic degradation and antibacterial experiments
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