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- 저자 : Priyadharsan Arumugam (검색결과 1 건)
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Carbon quantum dots supported ZnO sphere based photocatalyst for dye degradation application
Arun Velumani,Prabhu Sengodan,Priyadharsan Arumugam,Ramesh Rajendran,Sivakumar Santhanam,Maadeswaran Palanisamy 한국물리학회 2020 Current Applied Physics Vol.20 No.10
A Carbon quantum dots supported ZnO hollow Sphere (ZnO/C-dots) were synthesized through a solvothermal method using polyethylene glycol 400 (PEG 400) as a solvent. The phase and crystal structure of as-prepared ZnO/C-dots photocatalyst were characterized by powder X-ray diffraction (XRD). The surface morphology and size of the composite were analyzed using field emission scanning microscopy (FE-SEM). The optical properties of the as-prepared nanocomposites were examined using UV–visible (UV–Vis) spectrometer. The photocatalytic activity of pure ZnO and ZnO/C-dots nanocomposites were evaluated by the degradation of methylene blue (MB) under UV–Visible light irradiation. The ZnO/C-dots nanocomposites exhibited maximum photocatalytic MB dye degradation efficiency of 96% which is much higher that the pure ZnO (63%). The enhanced photocatalytic activity of ZnO/C-dots is due to the extended light absorption in the visible region and suppressed photoexcited electron-hole pair recombination rate. Moreover, the activity of photocatalyst after five cycles exhibits high stability, which is vital for the sustainable photocatalytic procedures. It is concluded that the prepared ZnO/Cdots composite have low cost, good stability and has a great potential application for Photocatalytic dye degradation.
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