Additional file 1: Figure S1.

Schematic illustration of the water splitting process in PEC cell. Figure S2. SEM images of the Sn/TiO2 NRs with different doping levels, (a) Sn/TiO2-0.5% NRs, (b) Sn/TiO2-8% NRs. Figure S3. EDX spectra measured from a series of Sn/TiO2 NRs, with initial SnCl4/TBOT ratio range from 0.5% to 8%, (a) 0.5%, (b) 1%, (c) 1.5%, (d) 2%, (e) 3%, (f) 8%, the marked values in the spectra are detected Sn/Ti ratio. Figure S4. A supercell for modeling the crystal structure of the Sn/TiO2 NRs. Figure S5. The photocatalytic properties of TiO2 and Sn/TiO2 nanorods with different morphology, (a) photoconversion density, (b) photoconversion efficiency.

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Sun et al. Nanoscale Research Letters 2013 8:462   doi:10.1186/1556-276X-8-462