Abstract
ZnO/CeO2 photocatalysts were loaded on to nanographene platelets (NGP) layer sheets to form ZnO/CeO2/NGP composites. The synthesized process was achieved by using two-step methods: Sol-gel followed by the hydrothermal method, the concentration of NGP was varied by 5, 10, and 15 wt.%. The as-prepared ZnO/CeO2/NGP samples were characterized by X-ray diffraction (XRD) and Brunner Emett-Teller (BET). The XRD spectra of all samples exhibit a good agreement with hexagonal wurtzite ZnO and face centered cubic phase of CeO2, additionally a new peak could be indexed for graphitic-like structures from NGP. The BET result shows that the incorporation of NGP could enhance the specific surface area of ZnO/CeO2 composites. Furthermore, it is found that addition of NGP in ZnO/CeO2 composites could enhance photocatalytic activities in methylene blue (MB) dye degradation compared to ZnO/CeO2 composites. Our results show that addition of 10 wt.% NGP to ZnO/CeO2 composites exhibits the highest photocatalytic activity. The e...
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