Progress in plasma doping semiconductor photocatalysts for efficient pollutant remediation and hydrogen generation

•Plasma-based doping of composite materials was an efficient way to reduce the band gap.•Plasma-based doping promoted substitutional doping.•Different methods for plasma discharge for doping were discussed.•Limited studies were performed on the real-life applications of plasma-based materials.•An in-depth understanding of the mechanisms was required for computational modelling.