Single-Step Production of a TiO@MoS Heterostructure and Its Applications as a Supercapacitor Electrode and Photocatalyst for Reduction of Cr(VI) to Cr(III).

In this study, we have reported a one-step synthesis of a TiO@MoS heterostructure. TiO@MoS was synthesized using a facile and cost-effective method. The as-synthesized TiO@MoS heterostructure was characterized by suitable spectroscopic techniques. The obtained TiO@MoS was utilized as a supercapacitor electrode material. Electrochemical studies show that the TiO@MoS heterostructure possesses a specific capacitance of 337 F/g at a current density of 1 A/g in an aqueous solution. Furthermore, an application as a photocatalyst for the photoreduction of toxic hexavalent chromium was reported for the first time. This heterostructure showed the photoreduction of Cr to Cr in 120 min with formic acid as a scavenger under direct sunlight. A plausible mechanism of photoreduction of Cr to Cr under natural sunlight irradiation using TiO@MoS is proposed.