研究目的
To synthesize heterostructure Ag/ZnO composites for photocatalysis and antibacterial activity evaluation.
研究成果
The 10 wt% Ag/ZnO composites showed the best performance for photocatalysis and had significant antibacterial activity. The composites promoted interfacial charge-transfer kinetics between Ag metal and ZnO semiconductor, improving the separation of photogenerated electron?hole pairs, and thus enhanced the photocatalytic and antibacterial activities.
研究不足
The study is limited to the evaluation of photocatalytic and antibacterial activities under specific conditions (UV light for photocatalysis and specific bacterial strains for antibacterial activity). The effect of other environmental factors and broader microbial spectrum was not explored.
1：Experimental Design and Method Selection:
A simple microwave method was used for the synthesis of ZnO flowers with different Ag contents. The photocatalytic activity was evaluated through photodegradation of methylene blue under UV light, and antibacterial activity was tested against Escherichia coli DH5α and Stapphylococcus aureus ATCC
2：Sample Selection and Data Sources:
259 Zinc nitrate hexahydrate and ammonium hydroxide were used as starting materials with cetyltrimethylammonium bromide (CTAB) as a surfactant. The products were characterized by XRD, SEM, TEM, and XPS.
3：List of Experimental Equipment and Materials:
X-ray diffractometer (XRD, Philips X’Pert MPD), field emission scanning electron microscopy (FE-SEM, JEOL JEM-6335F), transmission electron microscopy (TEM, JEOL JEM-2010), X-ray photoelectron spectroscopy (XPS, Axis Ultra DLD│Kratos – Kratos Analytical), UV–visible spectrophotometer (Perkin–Elmer Lambda 25), direct mass spectrometry (Agilent G6545A Q-TOF LC/MS).
4：Experimental Procedures and Operational Workflow:
Hydrothermal synthesis of ZnO flowers, microwave-assisted synthesis of Ag/ZnO composites, photocatalytic degradation of methylene blue, and antibacterial activity tests.
5：Data Analysis Methods:
XRD for phase analysis, SEM and TEM for morphology analysis, XPS for surface analysis, UV–visible spectrophotometry for photocatalytic activity, and direct mass spectrometry for degradation products analysis.
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