研究目的
To prepare a self-floating Sm/N co-doped TiO2/diatomite hybrid pellet with enhanced visible-light-responsive photoactivity and reusability for the degradation of tetracycline under visible light.
研究成果
The self-floating Sm/N co-doped TiO2/diatomite hybrid pellet (SN-TDHP) demonstrated enhanced visible-light-responsive photoactivity and good reusability for the degradation of tetracycline. The synergy between Sm and N dopants, as well as the adsorption ability of diatomite, contributed to the improved photocatalytic performance.
研究不足
The study focuses on the degradation of tetracycline under visible light and may not cover the full spectrum of pollutants. The reusability was tested up to 5 cycles, and longer-term stability needs further investigation.
1：Experimental Design and Method Selection:
The study employed a sol-gel method to co-dope TiO2 nanoparticles with samarium and nitrogen, supported onto diatomite, and granulated to produce self-floating pellet catalysts.
2：Sample Selection and Data Sources:
The samples included various SN-TDHP pellets with different doping amounts of samarium trinitrate, compared with N-TDHP, TDHP, and unsupported Sm/N-TiO
3：List of Experimental Equipment and Materials:
Instruments included X-ray diffractometer, UV-Vis spectrophotometer, FE-SEM, TEM, XPS spectrometer, and a TOC analyzer. Materials included titanium but-oxide, samarium trinitrate, urea, diatomite, and tetracycline.
4：Experimental Procedures and Operational Workflow:
The fabrication involved sol-gel synthesis, granulation, and calcination. Photocatalytic activity was assessed by degrading TC under visible light.
5：Data Analysis Methods:
The degradation kinetics were analyzed using the apparent first-order model, and the physicochemical properties were characterized by various spectroscopic and microscopic techniques.
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