S-Doped Sb2O3 Nanocrystal: an Efficient Visible-Light Catalyst for Organic Degradation

The S-doped Sb 2 O 3 nanocrystals were successfully synthesized using SbCl 3 and thioacetamide (TAA) as precursors via a facile one-step hydrothermal method. The effects of pH of the precursor reaction solution on the product composition and property were determined. The results indicated that the doping amount of S could be tuned by adjusting the pH of the precursor solution. Furthermore, the S entered into the interstitial site of Sb 2 O 3 crystals as S 2− , which broadened the absorption wavelength range of the Sb 2 O 3 nanocrystal. The S-doped Sb 2 O 3 exhibited an excellent visible-light-driven photocatalytic activity in the decomposition of methyl orange and 4-phenylazophenol. Last, a possible photocatalytic mechanism of the S-doped Sb 2 O 3 under visible light irradiation was proposed.