期刊
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
卷 31, 期 4, 页码 3361-3374出版社
SPRINGER
DOI: 10.1007/s10854-020-02885-y
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ZnO nanoparticles, known as one of the potential materials for photocatalytic application, were synthesized by template/surfactant-free hydrothermal method and annealed at different temperatures. Annealing the ZnO at 400 degrees C modified the rod-like structures into irregular shaped structures. Further, using wet impregnation method ZnO/reduced graphene oxide (rGO) nanocomposites were prepared for various amounts of rGO. Field emission scanning electron microscopy (FESEM) analysis revealed that ZnO/rGO (6 mg) nanocomposites contain both ZnO and rGO nanoparticles. Optical band gap of the as-synthesized ZnO nanoparticles was slightly shifted from 3.09 to 3.02 eV in ZnO/rGO (6 mg) nanocomposites. Photoluminescence spectral analysis showed that the electron-hole pair recombination rate is effectively suppressed in the ZnO/rGO (6 mg) nanocomposites. Further, the photocurrent measurements revealed that ZnO (annealed at 400 degrees C) acquires a photocurrent of 2.8 mu A/cm(2) and is increased to 4.8 mu A/cm(2) for ZnO/rGO (6 mg) nanocomposites. UV light irradiation exhibited that ZnO nanoparticles annealed at 400 degrees C show 94% degradation efficiency against Rhodamine B dye for 120 min. Further, ZnO/rGO (6 mg) nanocomposites acquired degradation efficiency of 94% against Rhodamine B dye for 20 min with a better cycling stability up to five cycles.
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