研究目的
Investigating the molecular doping of electrochemically prepared triazine-based carbon nitride by 2,4,6-triaminopyrimidine for improved photocatalytic properties.
研究成果
The incorporation of TAP tunes the electronic structure of PTI, leading to a decrease in the band gap and improved photocatalytic properties. The degradation rate of methylene blue was increased by a factor of 4 compared to undoped PTI or 7 compared to melon.
研究不足
The stability of the catalyst decreases with every recycling step, and the degradation rate decreases to 27.5% of the initial value after 3 cycles.
1：Experimental Design and Method Selection
The synthesis involves copolymerization of melamine with 2,4,6-triaminopyrimidine (TAP) in an electrochemically induced polymerization process based on the electrolysis of water and evolving radicals.
2：Sample Selection and Data Sources
Solutions were prepared with 0, 25, 50, 75, and 100 mol % of TAP. The total molar amount and the sodium hydroxide concentration of melamine and TAP were constant.
3：List of Experimental Equipment and Materials
Chemicals include melamine, TAP, sodium hydroxide, hydrochloric acid, DMSO, MB, tert-butanol, EDTA?2Na, and BQ. Equipment includes a three-electrode set-up with a reference electrode (Ag/AgCl/KCl), counter electrode (platinum), and working electrode (platinum).
4：Experimental Procedures and Operational Workflow
A voltage of 5 V was applied for 90 min at room temperature under continuous stirring. The product was obtained in solution, adjusted to a suspension by addition of hydrochloric acid, separated by centrifugation, and washed.
5：Data Analysis Methods
Characterization methods include UV?vis spectroscopy, FTIR, powder XRD, SEM, TEM, BET measurements, and 13C NMR spectroscopy.
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获取完整内容-
melamine
Sigma-Aldrich
Precursor for the synthesis of PTI
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2,4,6-triaminopyrimidine
Sigma-Aldrich
Molecular dopant for PTI
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sodium hydroxide
Gru?ssing GmbH
Used in the synthesis process
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hydrochloric acid
VWR
Used to adjust pH value
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DMSO
ACROS organics
Solvent for NMR spectroscopy
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methylene blue
Merck Chemicals GmbH
Dye for photocatalytic experiments
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tert-butanol
Gru?ssing GmbH
Scavenger for hydroxyl radicals
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EDTA?2Na
Sigma-Aldrich
Scavenger for holes
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para-benzoquinone
Sigma-Aldrich
Scavenger for superoxide radicals
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