Green synthesis of SrFe12O19@Ag and SrFe12O19@Au as magnetic plasmonic nanocomposites with high photocatalytic performance for degradation of organic pollutants

Comparative Study on the Role of Noble Metal Nanoparticles (Pt and Pd) on the Photocatalytic Performance of the BaFe12O19/TiO2 Magnetic Nanocomposite: Green Synthesis, Characterization, and Removal of Organic Dyes under Visible Light

“…Nowadays, many alternative methods are used, including adsorption 6−9 and photocatalysis, 10,11 as green techniques are more significant. 12 In this way, metal oxides have been employed as semiconductor photocatalysts, an innovative way to harness naturally occurring sunlight to eliminate various hazardous environmental pollutant substances for years. 13 Titanium dioxide is a well-known and popular substance among researchers because of its features of chemical inertness, harmlessness, low price, and high stability.…”

“…30 Metal nanoparticles have broad applications, including in agriculture, 31 antimicrobials, 32−34 sensors, 35,36 nanodrug delivery, 37 and photocatalysis. 12 Coupling titanium dioxide (TiO 2 ) with noble metals (metallic cocatalyst) improves photocatalytic behavior because of the surface plasmon resonance (SPR) created by noble metals. Indeed, the photoresponse of the metal oxide was activated by the noble metal (Ag, Au, Pt, or Pd) as a cocatalyst, which plays the role of electron donor to TiO 2 because of the Schottky barrier.…”

“…Conventional wastewater treatment methods are insufficient because of the highly stable dyes. Nowadays, many alternative methods are used, including adsorption − and photocatalysis, , as green techniques are more significant . In this way, metal oxides have been employed as semiconductor photocatalysts, an innovative way to harness naturally occurring sunlight to eliminate various hazardous environmental pollutant substances for years …”

“…12 O 19 , and it is obtained at 5.77 eV. E CB , E VB , E g , and E e are the CB and VB energies, band gap energy, and energy of the free electrons versus hydrogen,69 respectively.…”

“…(ii) Noble metals as SPR electron generators absorb visible illumination, which leads to the excitation and transfer of electrons to the TiO 2 . Likewise, the number of electrons in the current increases.•(12)…”