研究目的
Investigating the therapeutic effects of a specific photocatalyst on the inactivation of Escherichia coli.
研究成果
The Mn-CdS/ZCISe/CIS/TiO2 photocatalyst demonstrated high efficiency in the inactivation of Escherichia coli under visible light, with a significant photocurrent density and good stability. The photo-generated holes were identified as playing a major role in the sterilization process.
研究不足
The study focuses on the inactivation of Escherichia coli and may not be directly applicable to other bacterial species. The photocatalytic efficiency under different environmental conditions was not extensively explored.
1：Experimental Design and Method Selection:
The study involved the preparation of a Mn-CdS/ZCISe/CIS/TiO2 photocatalyst with TiO2 nanowires as support and various quantum dots and nanoparticles as sensitizers. The methodology included the synthesis of CIS and ZCISe QDs, fabrication of TiO2 nanowires, and the coating of Mn-CdS on the ZCISe/CIS/TiO2 nanowires by SILAR.
2：Sample Selection and Data Sources:
The materials used included Titanium sheet, Zinc chloride, 1-octadecene, 1-dodecanethiol, Se powder, indium(III) chloride tetrahydrate, Oleylamine, Manganese acetate tetrahydrate, cadmium nitrate, and sodium sulfide nonahydrate.
3：List of Experimental Equipment and Materials:
SEM (Hitachi S-4800), XRD, PL spectrophotometer (Hitachi F-4600), UV-Vis spectrophotometer (Cary 60 and Cary 300), CHI electrochemical workstation (CHI660D), Xe lamp.
4：Experimental Procedures and Operational Workflow:
The synthesis of QDs, fabrication of TiO2 nanowires, loading of QDs and Mn-CdS NPs on TiO2 nanowires, and photoelectrochemical and bactericidal tests.
5：Data Analysis Methods:
The bactericidal efficiency was evaluated by kinetic constants calculated based on the Click model, and the photoelectrochemical performance was assessed by photocurrent density measurements.
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SEM
Hitachi S-4800
Hitachi
Examining the morphology of the electrodes
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PL spectrophotometer
Hitachi F-4600
Hitachi
Recording PL spectrogram
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XRD
Obtaining crystalline phase information
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UV-Vis spectrophotometer
Cary 60 and Cary 300
Agilent and Varian
Examining UV-Vis absorbance and diffuse reflectance spectra
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Electrochemical workstation
CHI660D
Shanghai Chenhua Instrument Co. Ltd
Implementing photoelectrochemical experiments
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Xe lamp
CHFXQ- 500 W
Beijing Changtuo Co. Ltd
Providing incident light for experiments
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