文化大學機構典藏 CCUR:Item 987654321/49484
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    題名: Ag-nanoparticle enhanced photodegradation of ZnO nanostructures: Investigation using photoluminescence and ESR studies
    作者: Wang, CC (Wang, Chih-Chiang)
    Shieu, FS (Shieu, Fuh-Sheng)
    Shih, HC (Shih, Han C.)
    貢獻者: 化材系
    關鍵詞: Ag--nanoparticle/ZnO nanostructures
    Photocatalysts
    Electron spin resonance
    Photoluminescence
    日期: 2021-02
    上傳時間: 2021-04-14 16:16:00 (UTC+8)
    摘要: Ag-nanoparticle/ZnO nanostructures were synthesized using a room-temperature sol-gel method, followed by the thermally activated process at 500 degrees C under 4x10-3 Torr. The nanostructures were elucidated the results of HR-TEM, FE-SEM, and XRD. ESR and PL spectra revealed defects, including (O-i)'', (V-Zn)'', (V-O)(center dot center dot),and (Zn-i)(center dot center dot), which were the main factors to enhance the chemi-degradation reactivity and the photodegradation efficiency of the Ag-nanoparticle/ZnO nanostructures. The Ag nanoparticles formed on the ZnO nanoparticle surfaces significantly influenced the intensities of PL and ESR signals, which extended the free-carrier lifetime and confirmed the high degradation efficiency and the large reaction coefficient of the Ag-nanoparticle/ ZnO nanostructures. Photodegradation results reveal that the efficiency and reaction rate coefficient of the Agnanoparticle/ZnO nanostructures were 3.6 and 15 times higher than those of pristine ZnO nanostructures. According to multi-run photodegradation tests, the Ag-nanoparticle/ZnO nanostructure exhibited stable photo degradation efficiencies of more than 99 % and reaction rate coefficients of 0.06-0.07 min(-1), indicating that the Ag-nanoparticle/ZnO nanostructure had stable and reliable photodegradation efficiency.
    關聯: JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 卷冊: 9 期: 1 文獻號碼: 104707
    顯示於類別:[化學工程與材料工程學系暨碩士班] 期刊論文

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