File Name : s1-xrd.tif

Caption : fig. s1. xrd pattern of pure nis.

File Name : s2-sem.tif

Caption : fig. s2. (a) low- and (b) high-magnification sem images of pure nis.

File Name : s3-drs.tif

Caption : fig. s3. (a) the plot of (αhν)2 versus hν of cds, (b) mott–schottky plots of cds, (c) energy band diagram of cds.

File Name : s4-h2.tif

Caption : fig. s4. the h2-production rate over 25ns-c photocatalyst using different concentrations of hole scavenger under visible light irradiation. (a) 0.25 m na2s, 0.35 m na2so3, (b) 0.50 m na2s, 0.70 m na2so3, (c) 0.75 m na2s, 1.05 m na2so3, (d) 0.875 m na2s, 1.225 m na2so3, (e) 1.0 m na2s, 1.4 m na2so3.

File Name : s5-xrd.tif

Caption : fig. s5. xrd patterns of 25ns-c before reaction and after 3h of photocatalytic reaction.

File Name : s6-lsc.tif

Caption : fig s6. the lsv curves of cds and 25ns-c samples.

File Name : s7-sem.tif

Caption : fig s7. the sem image of 25ns-c after photocatalytic reaction.