Exploring the electrochemical and photocatalytic potential of metal chalcogenide thin film Cu2S:Ni3S4

This comprehensive study delves into the synthesis and characterisation of Cu2S:Ni3S4 thin films, fabricated using diethyldithiocarbamate as a sulphur source via physical vapour deposition. A systematic analysis employing various techniques elucidated the material's structural, morphological, and optical properties. The resulting thin film exhibited a well-defined crystalline structure, boasting an average crystallite size of 32.6 nm, indicative of a remarkable crystallinity of 74%. Optical characterisation shed light on the material's optical behaviour, revealing a band gap energy of 2.47 eV. X-ray photoelectron spectroscopy provided insights into the elemental composition and chemical bonding, unveiling distinct core level peaks attributed to Cu 2p, Ni 2p, and S 2p. Electrochemical evaluations through voltammetry measurements showcased exceptional specific capacitive performance, achieving an impressive value of 562 Fg(-1). The thin film also demonstrated remarkable stability over multiple cycles, highlighting its immense potential for diverse energy storage applications. Furthermore, extensive investigations into the photocatalytic efficacy of the synthesised material unveiled its remarkable prowess in degrading various environmental pollutants. These significant findings underscore the versatility of Cu2S:Ni3S4 bimetallic sulphide thin films, extending their scope beyond energy storage and paving the way for further exploration and technological advancements in the realms of photocatalysis and beyond.