Annealing Induced Oxygen Defects on Green Sonochemically Synthesized ZnO Nanoparticles for Photoelectrochemical Water Splitting. Issue 42 (13th November 2018)

• Record Type: Journal Article
• Authors: Kumar, Vinod; Gohain, Mukut; Kant, Rich; Ntwaeaborwa, O. M.; Hari, Parameswar; Swart, H. C.; Dutta, Viresh
• Is Part Of: ChemistrySelect. Volume 3:Issue 42(2018)
• Page Start: 11914
• Page End: 11921
• Publication Date: 2018-11-13
• Subjects: Defects -- Green chemistry -- PEC water splitting -- XPS -- ZnO; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201802668
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: Zinc oxide (ZnO) nanoparticles were prepared by a green process using a simple sonochemical method. The prepared nanoparticles were annealed at different annealing temperatures in order to determine the role of the annealing temperature on the structural, morphological and optical properties of the prepared material. The defects related photoluminescence properties of the ZnO nanoparticles are discussed in detail. X‐ray photoelectron spectroscopy provided the information regarding the presence of the defects in the material. ZnO emission related to defect emission was observed to increase with annealing temperature upto 600°C and then decreased. These defects played a crucial role in the performance of the photo‐electrochemical (PEC) activity. The PEC performance has increased with an increase in the amount of oxygen related defects present in the material due to annealing. Abstract : The role of annealing temperature on the defects formation in ZnO nanoparticles synthesized by the sonochemical method is observed. The defects related to the oxygen in ZnO could be modified by changing the annealing temperature. These defects is played a crucial role in the performance of ZnO based photo‐electrochemical activity. The photo‐electrochemical performance is increased with an increase in the amount of oxygen related defects in the material.