研究目的
Synthesizing cocoon-like Ag3PO4 with hollow structure and evaluating its photocatalytic performance in degrading ciprofloxacin under visible light.
研究成果
Cocoon-like Ag3PO4 with hollow structure was successfully synthesized and showed superior photocatalytic activity and stability for ciprofloxacin degradation under visible light, primarily due to high surface area, hollow structure, and formation of metal silver, with h+ and ?O2? as main reactive species.
研究不足
The paper does not explicitly mention limitations, but potential areas could include scalability of synthesis, long-term stability beyond tested cycles, and applicability to other pollutants or real wastewater conditions.
1：Experimental Design and Method Selection:
The study used an ion-exchange route to synthesize cocoon-like Ag3PO4, with characterization and photocatalytic activity measurements under visible light irradiation.
2：Sample Selection and Data Sources:
Samples included C-Ag3PO4 and R-Ag3PO4 (for comparison), with ciprofloxacin as the target pollutant.
3：List of Experimental Equipment and Materials:
Equipment included Bruker D8 diffractometer, Hitachi S-4800 SEM, JEOL JEM-2100F TEM, PHI Quantera II SXM XPS, UV-3600 spectrophotometer, ASAP2020 surface area analyzer, and a 500 W Xe lamp with cut-off filter. Materials included AgNO3, Na2MoO4?2H2O, Na2HPO4, deionized water, ethanol, TBA, BQ, AO, and BaSO
4：Experimental Procedures and Operational Workflow:
Synthesis involved precipitation and stirring steps; characterization included XRD, SEM, TEM, XPS, EDS, DRS, and BET; photocatalytic tests involved dispersion in CIP solution, stirring in darkness, irradiation, sampling, and UV-Vis analysis; radical trap experiments used scavengers.
5：Data Analysis Methods:
XRD patterns matched with JCPDS standards, band gaps calculated using (Ahv)^1/2 vs. hv plot, degradation efficiency monitored at 276 nm absorbance, and statistical comparisons made.
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X-ray diffractometer
D8
Bruker
Characterization of XRD patterns to identify crystal structure and phase purity.
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Scanning electron microscopy
S-4800
Hitachi
Investigation of morphologies of the samples.
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Transmission electron microscopy
JEM-2100F
JEOL
Investigation of morphologies and EDS analysis for elemental composition.
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UV-Vis spectrophotometer
UV-3600
Shimadzu
Conduction of diffuse reflectance spectra and determination of CIP concentration.
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X-ray photoelectron spectrometer
Quantera II SXM
PHI
Analysis of composites and electronic binding energy.
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Surface area analyzer
ASAP2020
Micromeritics
Measurement of BET surface area.
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Xe lamp
500 W with cut-off filter
Providing visible light irradiation for photocatalytic experiments.
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