File Name : fig s1.tif

Caption : fig. s1 raman spectra of the cns

File Name : fig s2.tif

Caption : fig. s2 epr spectra of the cns

File Name : fig s3.tif

Caption : fig. s3 photocatalytic reduction of cr(vi) under the visible irradiation with the cn 

File Name : fig s4.tif

Caption : fig. s4 pseudo-first order kinetics plots

File Name : fig s5.tif

Caption : fig. s5 cv curves of cn samples