Title : Green synthesis of SnO2@Cu(O,S) nanocomposite catalysts for reduction of Cr(VI) under dark condition
Abstract:
Applying a green technology approach to the synthesis of single phase, heterostructure, and composite heterogeneous catalyst nanomaterials for a wide range of applications in various research fields such as hydrogen generation, antibacterial activities, solar energy utilization, sensor technology, battery innovation, and advanced oxidation processes not only addresses pressing environmental concerns but also enhances synthesis precision, operational efficiencies, and cost-effectiveness. In this study, a novel method was employed using ginger (Zingiber officinale) extract as a highly effective nucleating agent to facilitate the precipitation of distinct materials including the wider bandgap SnO2 single-phase, the Cu(O,S) heterostructure, and the SnO2@Cu(O,S) composite nanomaterials. The formation of relatively large-sized SnO2 nanomaterials on the surface as well as between the smaller-sized Cu(O,S) nanoparticles played a crucial role in promoting electron delocalization across the boundary layer due to the intrinsic surface charge disparity between these blended nanomaterials. Electron transfer from the n-type SnO2 to the p-type Cu(O,S) nanoparticles crossing the boundary layer played a key role in the reduction of Cr(VI) to Cr(III) in the absence of light. Through systematic investigations concerning different weight ratios of SnO2 and various operational parameters, the Cr(VI) reducing activities of these composite nanomaterials were thoroughly explored and optimized in this comprehensive research work.
Audience Take Away
- Green synthesis of SnO2@Cu(O,S) composite nanomaterials for faster reduction of Cr(VI) under dark conditions.
- A very facile, environmentally friendly and energy efficient synthesis method, which can also be used to produce other nanomaterials in different research fields.
- ???????The resulting nanomaterials can be expanded to other fields including battery technology, solar cells, antibacterial activities, and drug deliveries with controlled shapes, and others.