Salih Hadi Kadhim
Department of Chemistry, College of Science, University of Babylon, Hilla 51002, Iraq

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Synthesis, Characterization and Catalytic Activity of NiO-CoO-MgO Nano-Composite Catalyst Salih Hadi Kadhim; Tariq Hussein Mgheer; Hussein Idrees Ismael; Khudheyer Jawad Kadem; Ahmed Saadon Abbas; Abbas Jasim Atiyah; Iman Jassim Mohamad
Indonesian Journal of Chemistry Vol 19, No 3 (2019)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (592.937 KB) | DOI: 10.22146/ijc.38119

Abstract

The ternary NiO-CoO-MgO catalyst in three ratios 20:20:60, 25:25:50, and 30:30:40 for these component oxides respectively, were synthesized by co-precipitation method of their carbonates by addition of a precipitate agent in basic media, and then calcinated these carbonate to obtain of mixed oxides. The prepared catalysts were characterized by using Powder X-Ray Diffraction (PXRD), Fourier Infrared spectroscopy (FT-IR), and Atomic Force Microscopy techniques (AFM) were used for identification of the prepared catalysts. The result showed that the particle size of these catalyst ratios, were in the nano range and the smallest size was 25:25:50. The investigation of catalytic activity of prepared catalysts was done by photo decolorization of Celestine blue B dye from simulated industrial wastewaters in aqueous solution. The decolorization efficiency of dye reached 99.9% after irradiation time for 1 h. Study the effect of different reaction conditions such as the pH of the medium, the weight of semiconductor and temperature of mixture reaction were shown that the maximum degradation was observed in conditions at pH = 4, catalyst dosage = 0.08 g, and temperature = 303 K.
Adsorption of Malachite Green Oxalate Dye by CuCo2O4/MgO Spinel Oxide Nanocomposite Tariq Hussein Mgheer; Ali Abdulraheem Kadhim; Zainab Abdalameer Hussein; Zaid Kaheel Kadhim; Muneer Abdul Aly Al-Da’amy; Abbas Jassim Atiyah; Salih Hadi Kadhim; Suma Jaafar Abbas
Indonesian Journal of Chemistry Vol 23, No 5 (2023)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.83850

Abstract

The current study involves a synthesis of a composite of copper oxide and cobalt oxide as a spinel oxide load over magnesium oxide. This synthesis of nanocomposite material was from nitrate salts of the corresponding metals by co-precipitation method, while it was investigated by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction techniques (XRD), field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), and the activity of these materials was estimated by appreciated adsorption of malachite green oxalate (MGO) dye from its aqueous solution. Adsorption isotherm was investigated using both Freundlich and Langmuir adsorption isotherms. While the results of the spectrophotometric studies showed that the composition of synthesized supported oxides at 450 °C was spinel type with nanoparticle size, and the optimum removal efficiency was around 98% for the adsorption of MGO dye over spinel nanocomposite surface achieved by using a dye concentration of 5 ppm, a mass of adsorbent surface of 5 mg, in terms of the adsorption model's isotherms the obtained results showed that the removal of MGO dye by the surface of this material was more fitted with the Freundlich models' adsorption.