Microwave-assiste d method for preparation of Sn-doped ZnS nano structures in water and their photocatalytic activity

Nanocrystalline semiconductor materials a re the sub ject of intense research due to their remarkable s ize, shape and surface dependent p hysical and chemical p roperties [۱]. Photocata lysis, a n advanced oxidation technology employing semiconductors as photocatalysts, is a prom ising method for treatment of contamina ted ground, surface, an d wastewate r containin g various organic p ollutants [۲ ]. This method is gen erally based on generation of OH radicals wh ich interact with o rganic pollutants leadi ng to degradation and, subsequently, mineralization [۳]. R ecombination of e lectron an d hole, pr oduced in photocatalytic degrada tion of the pollutants, decreases the photocatalytic activity. Doping of ZnS nanostructures with various cations can reduce the recombinatio n rate. For this reason, we have prepared Sn-dope d ZnS nanostructures i n water with various dopant c ontents by microwave irradiation. In addition, photocataly tic degradation of meth ylene blue (MB) u nder UV irr adiation was investigated.

کلیدواژه ها:

Sn-doped Z nS ، Photocatalysis ، Microwave irradiation ، Nano structures