File Name : sp1.tif

Caption : fig. s1 ft-ir spectrum of zn-bi ns and zn-bi<sub>2</sub>o<sub>2</sub>co<sub>3</sub> ns.

File Name : sp2.tif

Caption : fig. s2 the xps survey spectrum of the zn-bi<sub>2</sub>o<sub>2</sub>co<sub>3</sub> catalyst.

File Name : sp3 .tif

Caption : fig. s3 sem image of bi ns catalysts.