List of Articles co-doping

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  1 - Evaluation of Optimization Removal of Methyl Orange from Aqueous Solutions with Ag, Co/TiO2 Nano-Particles by Experimental Design
  Nasim Ziaefar Saber Khodaei Jila Talat-Mehrabad Farzad Arjomandi Rad
  10.22034/jest.2021.26884.3584
  Background and objective: Studying photocatalytic activities, some factors including the concentration of the pollutant, the amount of photo-catalyst, pH, and calcination temperature affect the process of eliminating the pollutant from aquatic solutions. Using an experi More

  Background and objective: Studying photocatalytic activities, some factors including the concentration of the pollutant, the amount of photo-catalyst, pH, and calcination temperature affect the process of eliminating the pollutant from aquatic solutions. Using an experimental design, it is possible to eliminate the unnecessary factors and determine the optimal conditions. Method: The Ag, Co/TiO2 Nano-particles for eliminating methyl orange has been evaluated. The four main variables involved in the process of elimination of methyl orange are the original concentration of the pollutant, the doges of photo-catalyst, pH, and calcination temperature. So arraying four factors changes at 3 levels. Therefore, considering the surface conditions for optimization and for determining the effect of each factor, totally 9 experiments are needed. Findings: The effect of the operational parameters include the original concentration of the pollutant, the amount of the photo-catalyst, pH, and calcination temperature, was optimized through experimental design.    Discussion and Conclusion:  The results of the experiments on photochemical degradation of Methyl Orange using Taguchi method showed that the greatest effect is related to original concentration of the MO and the amount of the Nano-catalyst. Manuscript profile
• Open Access Article
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  2 - Investigation of Photocatalytic Activity of Acid Red 27 by Co-doped TiO2 Nanoparticle with Magnesium and Copper
  farzad arjomandi rad Jila talat mehrabad rana khalilnezhad
  10.30495/jest.2019.31247.3957
  Background and Objectives: Among the various types of contaminations, dyes have complicated structure and they are usually toxic and resistant to the biological treatment which enter into environment by industrial waste streams. The aim of this study was the removal of More

  Background and Objectives: Among the various types of contaminations, dyes have complicated structure and they are usually toxic and resistant to the biological treatment which enter into environment by industrial waste streams. The aim of this study was the removal of C.I. Acid Red 27dye by photocatalytic processes. Materials and Methods: In the present study, Cu, Mg/TiO2 nanoparticle was synthesized using sol gel technique. The physicochemical properties were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), diffuse reflectance spectroscopy (DRS), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDX) techniques. Findings: The XRD data showed anatase and rutile crystalline phase in catalysts, indicating that Cu and Mg co-doping did not influence the crystal patterns of TiO2. Also, the DRS results indicated that the band gap of co-doped photo catalyst was smaller than that of the monometallic and un-doped TiO2 and there was a shift in the absorption band towards the visible light region. Discussion and Conclusion: The photocatalytic efficiency of the synthesized catalysts was evaluated by degradation of C.I. Acid Red 27under visible light irradiation. The results showed that co-doping of the Cu and Mg can significantly improve the photocatalytic activity of the prepared photo catalysts. The results showed that Cu (0.1 wt.%), Mg (0.06 wt.%) co-doped TiO2 with optimum calcination temperature 450 °C had the highest photo activity among all samples under visible light. Additionally, the effect of influential parameters, such as doping content, photo catalyst dosage, initial dye concentration, initial pH and calcination temperature were studied.                                                                                                            Manuscript profile