Synthesis and characterization of ZnO nanostructures using modified chemical bath deposition method
Abstract ZnO thin films were deposited using a simple, convenient and an inexpensive modified chemical bath method along with subsequent air annealing. The reaction mechanism for the growth of the ZnO nanostructure after the air annealing is also discussed. SEM observations reveal the formation of flowerlike nanostructures that are composed of leaf-like petals of thin nanosheets. The annealed ZnO nanostructures grow with the hexagonal crystal structure. The ZnO nanostructure exhibits a blue shift in its optical absorption spectrum. The room temperature photoluminescence study reveals UV emission peaks due to near band edge emissions along with defect related blue and green emission peaks.
Abstract Oxygen-containing catalysts have a broad range of applications, and it is important to understand the structure–property relationships of these materials. In the past 30 years, 17O NMR spectroscopy, which is sensitive to the local structure of oxygen, has been used to study various catalysts, including non-framework oxides, zeolites, heteropoly acids, layered double hydroxides (LDHs) and metal-organic frameworks (MOFs). The results from these studies have provided rich information on the structure and interactions of oxygen catalysts. This review summarizes significant progress in 17O solid-state NMR studies of oxides and related catalysts.