Md. Ahsan Tamjid Talha, Taufique Sami, Abdullah-Al-Mazed Khan, Md. Farhan Jakib, Ishtiak Mahmud
Silver-doped titanium dioxide (Ag-TiO₂) nanoparticles have emerged as a promising material with implementation in photocatalytic water treatment, antibacterial applications, coatings, and solar-assisted hydrogen evolution. It has become a subject of extensive research because of its ease of production and overall stability. However, there are certain challenges. Practical application of Ag-TiO₂ nanoparticles is limited because of their underwhelming photocatalytic activity under visible light, silver nanoparticle leaching, and potential for environmental toxicity. Recent developments in the co-doping of Ag-TiO₂ with elements such as carbon, nitrogen, fluorine, copper, yttrium, zinc oxide, strontium, and zirconium have shown significant improvements in photocatalytic activity, antibacterial efficacy, and hydrogen evolution. Doping of certain elements and modifying the surface morphology have enhanced the overall performance by increasing surface area, reducing electron-hole recombination, and adjusting the band gap energy. This review assembles recent developments in Ag-TiO₂ co-doping, featuring its promising applications and also highlighting the requirement for further studies to ensure effective execution.