研究目的
Investigating the preparation of cobalt oxide loaded graphitic carbon nitride (CoO/g-C3N4) for tetracycline (TC) removal from aqueous solution through adsorption and photocatalytic studies.
研究成果
The study demonstrated a dual functional adsorbent-photocatalyst for efficient TC removal from water, which could potentially be adopted for the removal of antibiotic pollutants from wastewater. The developed CoO/g-C3N4 exhibited high adsorption capacity and fast adsorption kinetic for TC, with a maximum adsorption capacity of 391.4 mg g-1 over 7%CoO/g-C3N4-3 sample.
研究不足
The photocatalytic reaction rate constant of CoO loaded g-C3N4 was lower than that of native g-C3N4. The loaded CoO particles might play the role of recombination center in photocatalytic process, which was not beneficial for photocatalysis.
1：Experimental Design and Method Selection:
The study involved the preparation of g-C3N4 by heating a mixture of melamine and NH4Cl, followed by loading CoO nanoparticles on g-C3N4 via an impregnation-calcination method.
2：Sample Selection and Data Sources:
Varied mass ratios of NH4Cl to melamine were used to obtain g-C3N4 samples. Cobalt oxide loading content was adjusted to 1%, 3%, 5%, and 7%.
3：7%. List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Equipment included a muffle furnace, X-ray diffractometer, transmission electron microscope, UV-visible spectrophotometer, X-ray photoelectron spectroscopy, and N2 physisorption measurement instrument. Materials included melamine, NH4Cl, cobalt acetate tetrahydrate, and tetracycline.
4：Experimental Procedures and Operational Workflow:
The process involved synthesis of g-C3N4, CoO loading, characterization, and evaluation of TC removal efficiency through adsorption and photocatalytic studies.
5：Data Analysis Methods:
Adsorption isotherm and kinetic studies were conducted and fitted by Langmuir and pseudo-second order kinetic models.
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