Enhanced catalytic activity of potassium-doped graphitic carbon nitride induced by lower valence position

- The valence band position of g-C3N4 shifted to a lower energy position via potassium doping.
- The photocatalytic activity of K-C3N4 was obviously enhanced.
- The separation and immigration of photogenerated carriers of K-C3N4 under visible light were also remarkably enhanced.
- The preparation method of doping composites was simple and low cost.