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SnS Nanoparticles and MoS2 Nanosheets Co-Decorated TiO2 Nanorod Film with Remarkable Photocatalytic and Photoelectrochemical Properties


 TiO2/SnS/MoS2 ternary nanorod arrays were synthesized on a fluorine-doped tin oxide (FTO) conductive glass by a successive hydrothermal method. The morphology, microstructure, optical properties, photodegradation activity, photoelectrochemical performance, and charge transport mechanism of TiO2/SnS/MoS2 were systematically studied. It was found that SnS and MoS2 with a narrow bandgap can facilitate light absorbance of TiO2/SnS/MoS2 heterostructures across the visible range, improving the utilization of sunlight. TiO2/SnS/MoS2 exhibits the maximum photodegradation rate (61.54%) for Rhodamine B (RhB) in 60 min with a pseudo-first-order rate constant (0.0122 min-1), which is about 5.16 times better than that of TiO2. As a photoanode, TiO2/SnS/MoS2 has the highest photocurrent (0.841 mA/cm2), which is approximately 8.32 times better than those of TiO2. The enhanced photocatalytic and photoelectrochemical performance of TiO2/SnS/MoS2 is ascribed to the Z-scheme mechanism determined by the detection of active species and the synergistic effect of SnS and MoS2 co-decoration.