Browsing by Author "Sharma P.P."

Now showing 1 - 1 of 1
  • Thumbnail Image
    Item
    Fabrication of dual S-scheme based CuWO4/NiFe/WO3 heterojunction for visible-light-induced degradation and reduction applications
    (Elsevier Ltd, 2024) Sharma R.; Islam N.; Priye A.; Kumar D.; Singh J.; Kumar M.; Sharma P.P.; Chauhan V.; Shandilya P.
    Wastewater remediation and efficient conversion of hazardous chemicals are one of the critical challenges in environmental science and sustainable chemistry. Photocatalytic heterojunction have shown a promising potential to address these issues by combining the unique features of different photocatalyst. Therefore, in this work we aim to synthesize a novel dual S-scheme CuWO4/NiFe/WO3 (CNW) heterojunction by ultrasonic assisted wet impregnation approach. Various microscopic and spectroscopic characterization techniques have been employed to understand the structure, composition, surface area, and charge carrier dynamics in heterojunction. The results suggested successful formation of CNW heterojunction with high crystallinity and high surface area beneficial for photocatalysis. The other techniques like UV-Vis, EIS, PL and photocurrent response revealed improved light absorption and better charge separation in CNW. The XPS study, trapping experiment and density functional theory (DFT) calculations validates the S-scheme charge migration pathway and major reactive oxidation species. Further, molecular electrostatic potential surface map indicates the electron rich and electron deficient sites on CNW heterojunction before irradiation. The photodegradation experiments showed that ibuprofen, an extensively used pharmaceutical pollutant was almost completely degraded within 80 min at pH= 6. Additionally, the 98% conversion of nitrobenzene into aniline along with 98% selectivity and 96% yield after 100 min of visible light irradiation without using strong reducing agents also revealed the high efficiency of CNW in photoreduction application. Therefore, this innovative dual S-scheme heterojunction strategy showing an exceptional potential for two substantial applications confirming the viability of CNW as a multifunctional photocatalyst. � 2024 The Authors