Enhanced visible-light-driven photocatalysis of Bi2YO4Cl heterostructures functionallized by bimetallic RhNi nanoparticles
Palepu Teja RAVINDAR, Vidya Sagar CHOPPELLA, Anil Kumar MOKSHAGUNDAM, M. KIRUBA, Sunil G. BABU, Korupolu Raghu BABU, L. John BERCHMANS, Gosipathala SREEDHAR
Enhanced visible-light-driven photocatalysis of Bi2YO4Cl heterostructures functionallized by bimetallic RhNi nanoparticles
Bismuth-based Sillen–Aurivillius compounds are being explored as efficient photocatalyst materials for the degradation of organic pollutants due to their unique layered structure that favours effective separation of electron–hole pairs. In this work, we synthesized Sillen–Aurivillius-related Bi2YO4Cl with the bandgap of 2.5 eV by a simple solid-state reaction and sensitized with rhodium nickel (RhNi) nanoparticles (NPs) to form the RhNi/Bi2YO4Cl heterostructure. Photocatalytic activities of BiOCl, Bi2YO4Cl and the RhNi/Bi2YO4Cl heterostructure were examined for the degradation of rhodamine-6G under visible-light illumination. Results demonstrated that the photocatalytic dye degradation efficiency of RhNi/Bi2YO4Cl heterostructures is higher than those of BiOCl and Bi2YO4Cl, attributed to the synergistic molecular-scale alloying effect of bimetallic RhNi NPs. The plausible mechanism for the degradation of rhodamine-6G and the effective electron–hole pair utilization mechanism were discussed.
BiOCl / Bi2YO4Cl / RhNi catalyst / rhodamine-6G / photocatalysis
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