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Improvement in Photocatalytic Properties of Synthesized Nano-structured ZnO in Magnetic Water and in Presence of Static Magnetic Field
摘要： This article presents the effects of magnetic water (MW), and static magnetic field (SMF) compared to non-magnetic water (NMW) on the synthesis and photocatalytic efficiency of ZnO nano-structures. ZnO nano-structures are synthesized in the three methods; in the MW (110 mT), in the presence of a SMF (75 mT) and NMW. The Different analysis is performed on the synthesized materials utilizing UV-visible spectrometer, XRD and FESEM. Then, the photocatalytic activities of the ZnO samples are comparatively studied. The results of the XRD analysis show that all the three nano-structures of ZnO are in hexagonal phase. The average size of the synthesized nano-structure ZnO crystals in the presence of SMF and MW are 10% and 19% bigger than the synthesized sample in the NMW. The FESEM images show the synthesized ZnO samples in the NMW, and the MW has a rod-like structure, but in the presence of SMF looks to be agglomerated. Photocatalytic activity of synthesized ZnO in the presence of the SMF and the MW are respectively 26% and 24% higher than the synthesized ZnO in NMW. Also, on comparing the performance of these ZnO nano-structures with the micron-sized sample, around 58% improvement in photocatalytic activity is observed.
关键词： ZnO,magnetic water,photocatalytic activity,crystal growth,hexagonal,nano-rod
更新于2025-09-11 14:15:04
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On the preparation of Tri-vanadium hepta-oxide thin films for electrochromic applications
摘要： Nanostructured Tri-vanadium hepta-oxide (V3O7) thin films for electrochromic devices having high optical modulation, enhanced optical density, multi-coloration, fast switching time, and better reversibility, were prepared by nebulizer spray pyrolysis technique with 400 oC substrate temperature. A monoclinic structured, V3O7 films having nano rod-like morphology have been observed from structural and surface morphological analyzes, respectively. Surface chemical analyzes revealed the mixed vanadium oxidation states that favored the formation of relatively stable V3O7 thin films. Electrochromic performance of the films was examined by electrochemical cyclic voltammetry (CV) studies with multiple CV scan rate. The multiple peaks present in the anodic and cathodic curves prove the multi-coloration behavior of the films with appreciable optical modulation in the visible range of light.
关键词： V3O7,Nano rod structure,Multicolor display,Nebulizer Spray Pyrolysis
更新于2025-09-11 14:15:04