| abstract |
The invention discloses a SnO 2 nanomaterial with oxygen vacancy defect, and a preparation and use method thereof. The invention adopts Sn 2+ as a tin source, and partially oxidizes it to Sn 4+ through a hydrothermal process at low temperature. 2 Oxygen vacancy defects are introduced into the lattice. The oxygen vacancy-deficient SnO 2 obtained by the present invention exhibits good performance when applied to adsorption and photocatalysis. Due to the existence of oxygen vacancies, it has a wider photoresponse range, stronger photo-generated electron and hole separation efficiency, and higher photocatalytic efficiency. There are many surface adsorption and redox reaction active sites, which can play a role in environmental remediation. The adsorption efficiency of methyl orange is 43.4%, and the degradation efficiency of methyl orange under simulated sunlight for 6 min is as high as 98.0%. ) adsorption efficiency was 78.0%, and the reduction efficiency of Cr(VI) under simulated sunlight for 4 min was as high as 98.3%. The oxygen vacancy-deficient SnO2 nanomaterial of the present invention is a photocatalyst integrating excellent adsorption and photocatalytic activity, which has excellent adsorption and photocatalytic performance and can be applied to multiple scenarios. |