Stabilization of SnO2 nanoparticles into the nanopores of modified Montmorillonite and their antibacterial activity

- SnO2 nanoparticles were stabilized on nanopres of modified clay.
- Montmorillonite clay was modified by HCl acid activation to form mesoporous support.
- Elemental dot mapping show distribution of Sn and O over the surface of support.

Metals and metal oxide nanoparticles clay supported composites arouse much interest in recent time. In this communication, we report the insitu synthesis of SnO2 nanoparticles by impregnation of SnCl2.2H2O into the nanopores of modified Montmorillonite followed by polyol reduction and aerial oxidation. The modified Montmorillonite having nanopores act as a 'Host' for the SnO2 nanoparticles. The TEM study reveals that SnO2 nanoparticles having size <10 nm are evenly distributed on the support. The XPS results show that the binding energy peaks at 490 and 498.2 eV are due to Sn3d5/2 and Sn3d3/2 respectively indicating the presence of Sn4+ in the SnO2 nanoparticles. Elemental dot mapping indicate the presence of Al, Si, O and Sn on the surface of AT-Mont. supported SnO2 nanoparticle. The synthesized SnO2 nanoparticles show antibacterial activity against gram +ve and gram −ve bacterial strains.

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