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Open Access Article
1 - Photo Degradation and Removal of Malachite Green from Water, Using Nano Titanium Dioxide Photo Catalyst
Mahdi Banaee Amir Zeidi Maryam RezaeiBackground and Objective: Malachite greenis an extensively used biocide in the aquaculture industry, and is highly effective against important protozoal and fungal infections. It is also used as a food coloring agent, food additive, and medical disinfectant as well as a MoreBackground and Objective: Malachite greenis an extensively used biocide in the aquaculture industry, and is highly effective against important protozoal and fungal infections. It is also used as a food coloring agent, food additive, and medical disinfectant as well as a dye in the silk, wool, jute, leather, cotton, paper, and acrylic industries. Therefore, the elimination of malachite green in wastewater of aquaculture and textile, paper and acrylic industries is essential in order to prevent its adverse effects on aquatic organisms. In this study, degradation of malachite green with titanium dioxide nanoparticles (TiO2 NPs) under UV light was investigated. Method: For this reason, the effects of parameters such as different concentrations of malachite green (3.5, 7 and 14 mg L-1) and the Nano-catalyst concentrations (1.30, 2.60, and 5.20 mg) in constant temperature (25°C) and constant UV intensity (12 W, 230 V, 50 Hz) during 180 minutes were studied. Findings: The best degradation rate of malachite green was found in the concentration of 3.5 mg L-1 malachite green, pH: 9, and 2.60 mg of TiO2 NPs. Although with an increase in titanium dioxide nanoparticles the efficiency and removal rate of malachite green increased, the increase in the photo catalyst had no effects on increasing the efficiency of photo degradation. An increase in pH (9) may improve the removal rate of malachite green through increasing free radicals. An increase in the initial concentration of malachite green decreased the efficiency and removal rate of malachite green. Discussion and Conclusion: Therefore, the photo degradation of malachite green in the presence of TiO2 NPs photo catalyst could be a function of pH, the initial concentration of malachite green and concentration of TiO2 NPs. Manuscript profile -
Open Access Article
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 khalilnezhadBackground 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 MoreBackground 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 -
Open Access Article
3 - H3PW12O40 and Nano-sized Titania Supported on Urea Formaldehyde Resin for Photo catalytic Decolorization of Dye Pollutants in Aqueous Solution
Hossein Salavati Marzieh Mousavi-Dashti Mousavi-Dashti -
Open Access Article
4 - Using ZnO based on Bentonite as a nano photo catalyst for degradation of Acid Red 114 in synthetic wastewater
Aref Shokri Reza Hekmatshoar Ahmadreza Yari -
Open Access Article
5 - Photocatalytic degradation of Malachite Green using ZnO and ZnO-TiO2 nanoparticles from aqueous solution
hadi baseri Elahe Alizadeh -
Open Access Article
6 - Photocatalytic degradation of Malachite Green using ZnO and ZnOTiO2 nanoparticles from aqueous solution
Hadi Baseri Elahe Alizadeh -
Open Access Article
7 - Using ZnO based on Bentonite as a nano photocatalyst for degradation of Acid Red 114 in synthetic wastewater
Reza Hekmatshoar Ahmad Reza Yari Aref Shokri