Methylene blue (MB) and Rhodamine B (RB) are produced as water pollutants in textile, plastic and dye industries. Many studies have investigated to remove RB and MB in wastewater of industries. At present work, Co 3 O 4 /ZnO nanocomposite is applied for removal of MB and RB dyes from water. Eco friendly, Co 3 O 4 /ZnO is synthesized via microwave assisted method. Results showed that uniform morphology and size particle is obtained at 10 min and 900W as optimum time and power. Synthesized Co 3 O 4 /ZnO is characterized with X-ray diffraction (XRD) analysis, Transmission Electron Microscopy (TEM), Fourier transform infrared (FT-IR) spectroscopy, Scanning Electron Microscopy (SEM) and vibrating sample magnetometers (VSM). Prepared nanocomposite shows excellent photo degradation behavior toward MB and RB under UV light. Photo degradation efficiency is calculated 80 and 90% for MB and RB respectively.
Methylene blue (MB) is produced as a water pollutant in textile, paper and dye industries. At this work, N-Doped Graphene Quantum Dots (N-GQDs)/Titanium Dioxide(TiO 2) as new Nanocomposite is designed and used for removal of MB from water. N-GQDs is synthesized via hydrothermal procedure with citric acid and ethylene diamine as precursor. N-GQDs/TiO 2 is synthesized via simple stirring of N-GQDs and TiO 2 nanoparticles at 24h. Synthesized N-GQDs and N-GQDs/TiO 2 is characterized with X-ray diffraction (XRD) analysis, Transmission Electron Microscopy (TEM), FT-IR, Scanning Electron Microscopy (SEM), Ultra violet (UV) and Photoluminescence (PL) spectroscopy. At the following, N-GQDs/TiO 2 is used as catalyst for photodegradation of MB. Results shows that N-GQDs have excellent effect on photocatalytic behavior of TiO 2 as common catalyst for photodegradation. By introducing of N-GQDs to TiO 2 nanoparticles, photodegradation efficiency of TiO 2 toward MB under UV light is increased from 40% to 85%.
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