| 초록 |
Self-doping in semiconductors is an intriguing strategy these days as compared to external doping, as it provides way out to tune electronic properties without any effect to chemical and thermal stability of original material. In this report, we report facile synthesis of Sn2+ self-doped SnS microparticles via a simple template-free hydrothermal route. Metal doping will eventually help in Cr(VI) reduction as electrons are main charge carriers in this system. Furthermore, doping will provide two advantages mainly, creating intermediate energy level in forbidden energy gap secondly acting as trapping sites thus suppressing charge recombination. Various spectroscopic, microscopic, and surface characterization techniques, confirmed the formation of self-doped SnS. Sn2+ self-doped SnS photocatalyst successfully reduced carcinogenic Cr(VI) to the water-insoluble Cr(III) form under visible light illumination. The best photocatalytic efficiency was obtained from an optimal doping conditions. |
