研究目的
To synthesize C3N4-decorated ZnO and Ag/ZnO nanoparticles for photocatalytic removal of methyl orange, investigating the synergistic effect of Ag and C3N4 in enhancing photocatalytic activity.
研究成果
The C3N4-decorated ZnO and Ag/ZnO nanoparticles exhibited enhanced photocatalytic activity for the degradation of methyl orange, attributed to the synergistic effect of Ag and C3N4. This work provides a new approach for the synthesis of ZnO-based photocatalysts with improved performance.
研究不足
The study did not explore the long-term stability of the photocatalysts under continuous operation or their performance under different environmental conditions. The mechanism of the synergistic effect between Ag and C3N4 could be further elucidated.
1：Experimental Design and Method Selection:
The study involved the synthesis of C3N4-decorated ZnO and Ag/ZnO nanoparticles using melamine and ZIF-8 as precursors through thermal treatment under air conditions.
2：Sample Selection and Data Sources:
Zinc nitrate hexahydrate and 2-methylimidazole were used as precursors for ZIF-8, which was then calcined to obtain ZnO. Melamine and AgNO3 were used for the synthesis of C3N4-decorated ZnO and Ag/ZnO composites.
3：List of Experimental Equipment and Materials:
Instruments included X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and UV-Vis spectrophotometry.
4：Experimental Procedures and Operational Workflow:
The synthesis involved grinding ZIF-8 and melamine, followed by calcination. Photocatalytic tests were conducted using methyl orange under UV light.
5：Data Analysis Methods:
The photocatalytic degradation efficiency was analyzed using pseudo-first-order reaction kinetics.
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MiniFlex 600
600
Rigaku
X-ray diffraction (XRD) analysis
-
Thermo ESCALAB 250
250
Thermo
X-ray photoelectron spectroscopy (XPS) analysis
-
Zeiss Merlin Compact
Merlin Compact
Zeiss
Field-emission scanning electron microscopy (SEM)
-
JEOL 2100F
2100F
JEOL
Transmission electron microscopy (TEM) and high-resolution transmission electron microscope (HRTEM) analysis
-
Shimadzu UV-3600
3600
Shimadzu
Ultraviolet–visible (UV–Vis) absorption spectra measurement
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Horiba Ihr 550
550
Horiba
Photoluminescence (PL) spectra recording
-
Nova 2200
2200
Quantachrome Corporation
Nitrogen adsorption/desorption isotherms measurement
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500 W high-pressure mercury lamp
Beijing China Education Au-light Co., Ltd
Excitation light source for photocatalytic tests
-
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