Photocatalytic degradation of reactive turquoise blue dye using MFe2O4 (M = Ni, Zn) spinels by reactive grinding and sol-gel methods

2016 ◽  
pp. 193-200
Author(s):  
J Pardiwala ◽  
Femina Patel ◽  
Sanjay Patel
Keyword(s):  
Photocatalytic Degradation ◽  
Sol Gel ◽  
Blue Dye ◽  
Reactive Grinding

Sol-gel prepared vanadium oxide for photocatalytic degradation of Methylene Blue dye

2020 ◽  
Author(s):  
Bapuso M. Babar ◽  
Aniruddh A. Mohite ◽  
Vithoba L. Patil ◽  
Udayraj T. Pawar ◽  
Laxman D. Kadam ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Vanadium Oxide ◽  
Photocatalytic Degradation ◽  
Sol Gel ◽  
Blue Dye ◽  
Methylene Blue Dye

scholarly journals USE OF NANOSIZED CHROMIUM DOPED TiO2 SUPPORTED ON ZEOLITE FOR METHYLENE BLUE DEGRADATION

2010 ◽  
Vol 10 (1) ◽  
pp. 20-25 ◽  
Author(s):  
Aarti Ameta ◽  
Indu Bhati ◽  
Rakshit Ameta ◽  
Suresh C. Ameta
Keyword(s):  
Methylene Blue ◽  
Titanium Dioxide ◽  
Photocatalytic Degradation ◽  
Sol Gel ◽  
Blue Dye ◽  
Photocatalytic Reaction ◽  
Methylene Blue Dye ◽  
X Ray Diffraction ◽  
Methylene Blue Degradation ◽  
X Ray

The photocatalytic degradation of methylene blue dye under visible light has been investigated using chromium modified titanium dioxide supported on zeolite (Cr-TiO2/zeolite). The photocatalyst was prepared by sol-gel method and characterized by X-ray diffraction and SEM. The rate of photodegradation of dye was monitored spectrophotometrically. The effect of pH, dye concentration, amount of photocatalyst and intensity of light on the rate of photocatalytic reaction was observed. The results showed that the use of Cr-doped TiO2 increased the rate of photocatalytic degradation of methylene blue as compared to untreated TiO2. The photocatalytic mechanism of Cr-TiO2 catalyst has been tentatively discussed.   Keywords: Methylene blue, zeolite, chromium, photocatalytic degradation

Sol-Gel Sonochemical Triton X-100 Templated Synthesis of Fe2O3/ZnO Nanocomposites Toward Developing Photocatalytic Degradation of Organic Pollutants

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Doaa A. Ali ◽  
Emad E. El-Katori ◽  
Ensaf Aboul Kasim
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
Point Of Zero Charge ◽  
Blue Dye ◽  
Reduction Peak ◽  
Methylene Blue Dye ◽  
Triton X ◽  
The Impact

Abstract The existing work emphasizes mainly to advance the low surface features of zinc oxide (ZnO) by dispersion of Fe2O3 nanoparticles on the ZnO surface fabricated via a sol-gel route with Triton X-100 as a structure and capping agent to synthesis a novel series of Fe2O3/ZnO nanocomposites (NCs) with novel features assembling between the two nanoparticle materials. Fe2O3/ZnO is an effective semiconductor which has higher efficiency in the removal of numerous organic dyes and other pollutants. The NCs was characterized via HRTEM, XRD, FTIR, BET, RS and UV–Vis DRS. A photocatalytic performance of the fabricated Fe2O3/ZnO nanocomposites was estimated by continual degradation of the methylene blue dye (MB) as an organic pollutant in aqueous solution. The comparison between pure ZnO (NPs) and Fe2O3/ZnO (NCs) show advanced photocatalytic performance under both UV and sunlight irradiation. The impact of several parameters, for example, dopant contents, photocatalytic dosage, pH, chemical oxygen demand (COD) and point of zero charge (PZC) were evaluated and discussed. In addition, the protective species’ role was estimated via a radical scavenger route. The photo-degradation data shown that the Fe2O3/ZnO (10 wt%) semiconductor is the fit photocatalyst between the fabricated semiconductors for the methylene blue dye (MB) degradation. The intensity reduction peak of UV emission and the intensity increment of visible emission were led to the lessening in recombination between electrons and holes which are finally responsible for the maximum photocatalytic performance of Fe2O3/ZnO nanocomposites. The gained results confirmed that the dopant content is the major factor in photocatalytic degradation activity.

scholarly journals Aluminum-Doped Cobalt Ferrite as an Efficient Photocatalyst for the Abatement of Methylene Blue

Water ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 2285
Author(s):  
Naseem Abbas ◽  
Nida Rubab ◽  
Natasha Sadiq ◽  
Suryyia Manzoor ◽  
Muhammad Imran Khan ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Annealing Temperature ◽  
Sol Gel ◽  
Nitrogen Adsorption ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Photodegradation Efficiency ◽  
Uv Visible ◽  
Adsorption Desorption

The present study is aimed to access the photodegradation efficiency of methylene blue dye using CoFe2O4 and Co0.1Al0.03Fe0.17O0.4 nanoparticles. The synthesis of spinel ferrites nanoparticles was performed by a facile sol-gel method. The synthesized nanoparticles were characterized by FTIR, XRD, SEM, EDS, Nitrogen adsorption/desorption and UV–Visible spectroscopy. The XRD studies confirmed the spinel cubic structure of ferrite. It was also found that the crystallinity increases at an annealing temperature of 800 °C. The application of these nanoparticles for methylene blue’s photocatalytic degradation was explored and also the optimization of several parameters involving dye’s concentration, amount of catalyst and pH of the solution was done. Photocatalytic degradation of methylene blue showed that at pH 11, using 200 W visible light bulb and in 120 min; 93% methylene blue dye was degraded by using 0.1 g of Co0.1Al0.03Fe0.17O0.4.

Photodegradation Kinetics of Phenol and Methylene Blue Dye Present in Water Stream Over Immobilized Film Ti02 Catalyst

2005 ◽  
Vol 5 (2) ◽  
pp. 131 ◽  
Author(s):  
Chin Mei Ling ◽  
Abdul Rahman Mohamed ◽  
Subhash Bhatia
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Sol Gel ◽  
Glass Tube ◽  
Molar Ratio ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Water Stream ◽  
Photocatalytic Reactor ◽  
Kinetics Of

A photocatalytic reactor has been designed to study the kinetics of photocatalytic degradation of phenol and methylene blue dye present in water stream on immobilized Ti02 catalyst. The principal part of the reactor consisted of a cylindrical pyrex glass tube whose outer surface was coated with the synthetic Ti02 film catalyst prepared from sol-gel technique. An ultraviolet light lamp of 365 nm wavelength was set longitudinally in the center of the tube. The synthetic Ti02 film formulation with the molar ratio of 1 titanium isopropoxide : 8 isopropanol: 1.1 H20: 3 acetyl acetone: 0.05 acetic acid was used to develop the immobilized Ti02 film catalyst deposited over the glass support. The performance of the immobilized photocatalytic reactor was evaluated by studying the decomposition kinetics of phenol and methylene blue dye present in the aqueous stream. The kinetics of photocatalytic degradation of phenol and methylene blue obeyed first order heterogeneous equation. The kinetic parameters were evaluated from the kinetic data using the Langmuir"Hinshelwood-Hougen-Watson (LHHW) model. Keywords: Kinetics, methylene blue, phenol, photocatalytic reactor, and Ti02 film catalyst.

Nickel doped Nano Cobalt (II) Oxide used as Photocatalyst for Degradation of Evans Blue Dye

2021 ◽  
Vol 25 (9) ◽  
pp. 71-78
Author(s):  
Nirmal Singh ◽  
Monika Jangid ◽  
Neetu Shorgar ◽  
Paras Tak
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Degradation ◽  
Evans Blue ◽  
Sol Gel ◽  
Blue Dye ◽  
X Ray Diffraction ◽  
X Ray ◽  
Evans Blue Dye ◽  
Transmission Electron ◽  
Working Parameters

The photocatalytic degradation of Evans blue (EB) has been studied under visible light in the presence of nanocrystalline nickel doped cobalt (II) oxide as a photocatalyst. Nickel-cobalt (II) oxide was synthesized by using Sol-gel technique. The photocatalyst was characterized by Field Emission Scanning Electron Microscopy (FESEM), Energy-dispersive X-ray spectroscopy (EDX), X-ray Diffraction (XRD), Fourier-transform infrared (FTIR) and High-resolution transmission electron microscopy (HRTEM). Effect of various working parameters like pH, concentration, amount of nickel doped and undoped cobalt (II) oxide, dose of dopants, light intensity etc. on the rate of degradation of Evans blue was also investigated. On the basis of observations, a suitable mechanism for the photocatalytic degradation of Evans blue dye has been proposed.

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