Potassium-doped g-C₃N₄ enables efficient visible-light-driven dye degradation.

Area of Science:

• Materials Science
• Environmental Chemistry
• Photocatalysis

Background:

• Element doping is a key strategy for improving photocatalyst efficiency.
• Graphitic carbon nitride (g-C₃N₄) is a promising photocatalyst material.
• Enhancing charge transfer and light absorption are crucial for better photocatalytic performance.

Purpose of the Study:

• To prepare potassium-doped graphitic carbon nitride (KCN) using a novel precursor.
• To investigate the effect of potassium doping on the electronic structure and properties of g-C₃N₄.
• To evaluate the photocatalytic performance of KCN for organic pollutant degradation.

Main Methods:

• Synthesis of potassium-doped g-C₃N₄ (KCN) via calcination using potassium sorbate and melamine.
• Characterization using various techniques (e.g., spectroscopy, microscopy) and electrochemical measurements.
• Photodegradation experiments using methylene blue (MB) as the target pollutant.

Main Results:

• Potassium doping effectively modified the band structure of g-C₃N₄, enhancing light absorption.
• Doping significantly increased the electrical conductivity, facilitating charge transfer and carrier separation.
• KCN demonstrated excellent photocatalytic activity for the degradation of methylene blue.

Conclusions:

• Potassium incorporation into g-C₃N₄ is an effective strategy to boost photocatalytic performance.
• The enhanced properties of KCN make it a promising material for removing organic pollutants.
• This approach offers potential for developing high-performance photocatalysts for environmental remediation.