Synthesis of MgO/TiO2 Nanocomposite and Its Application in Photocatalytic Dye Degradation

2018 ◽  
Vol 16 (8) ◽  
Author(s):  
K Sathish Kumar ◽  
K R Rohit Narayanan ◽  
S Siddarth ◽  
R Pavan Kumar ◽  
R Badri Narayan ◽  
...  
Keyword(s):  
Dye Degradation ◽  
Tween 80 ◽  
Degradation Efficiency ◽  
X Ray Diffraction ◽  
First Order ◽  
Oil In Water ◽  
Steady State Model ◽  
Photocatalytic Dye Degradation ◽  
Uv Visible ◽  
Catalyst Load

Abstract The application of nanoparticles in dye degradation is one of the trending arenas of research in the present day world. In this work, we report a novel route to synthesise MgO/TiO2 metal oxide nanocomposite by microemulsion technique and its application in photocatalytic dye degradation. Oil in water microemulsion was prepared using Span 80 and Tween 80 as surfactants whose proportion was regulated using hydrophilic and lipophilic Balance (HLB). The obtained microemulsion was then mechanically stirred and calcined to obtain the nanocomposite. The as-prepared nanocomposites were characterized using X Ray Diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The prepared nanoparticles exhibited remarkable potential to degrade azo dye (Methyl red) under UV-Visible light irradiation. The effect of catalyst in the degradation was studied for different concentrations of dye (20, 40, 60, 80, 100 mg/L) and different loadings of the catalyst (0.4, 0.6, 0.8, 1.0, 1.2 g/L) so as to determine the optimum catalyst load. The consistency of the obtained data was compared with the first order reaction rate expression. Quasi steady state model was used in fitting the data and the kinetic constants were evaluated. Also, the degradation efficiency of MgO/TiO2 nanocomposite was compared with the degradation efficiency of TiO2 nanoparticles synthesized by microemulsion method.

scholarly journals Sunlight Assisted Degradation of Methylene Blue as a Model Dye using Bismuth Oxychloride Nanoparticles: Ecofriendly and Industry Efficient Photocatalysis for Waste Chemical Treatment

2019 ◽  
Vol 32 (1) ◽  
pp. 115-121
Author(s):  
Chandan Adhikari ◽  
Mandeep Kaur ◽  
Ravichandran
Keyword(s):  
Methylene Blue ◽  
Dye Degradation ◽  
X Ray Diffraction ◽  
Visible Spectroscopy ◽  
X Ray ◽  
Bismuth Oxychloride ◽  
Fourier Transformed Infrared Spectroscopy ◽  
Different Types ◽  
Photocatalytic Dye Degradation ◽  
Uv Visible

In this study, an efficient sunlight triggered dye degradation was demonstrated using methylene blue as a model dye and bismuth oxychloride nanoparticles were used as photocatalyst. Two different types of nanoparticles, nanoflower and nanodisk, were prepared to understand the effect of morphology on the photocatalysis. Both the particles were prepared following a straightforward and easy methodology from readily available chemicals. The particles were characterized using scanning electron microscope, Fourier transformed infrared spectroscopy, powder X-ray diffraction. UV-visible spectroscopy and colorimeter were used to evaluate the photocatalytic activity of the catalyst. Both the nanoparticles were able to degrade the dye completely within 3-4 h under visible light. The photocatalytic rate constant analysis demonstrates that out of two morphology, nanoflower is found to be more effective than nanodisk towards dye degradation. The sunlight was also used to understand whether the photocatalyst can degrade the dye or not in presence of sunlight only. Both nanoparticles were able to degrade the dye 100 % in presence of sunlight within maximum 4 h. The photocatalytic dye degradation in presence of sunlight was conducted in between 10 a.m. to 4 p.m. when the maximum amount of sunlight is available with high intensity and energy. The catalysts were 100 % active after the first cycle and upto four cycles the dye degradation efficiency remain around 60-80%. The study demonstrates that sunlight can degrade the dye in presence of these photocatalyst which clearly indicates its energy saving approach thus making it more economic and green methodology for the industries.

scholarly journals Au/TiO2Reusable Photocatalysts for Dye Degradation

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Silija Padikkaparambil ◽  
Binitha Narayanan ◽  
Zahira Yaakob ◽  
Suraja Viswanathan ◽  
Siti Masrinda Tasirin
Keyword(s):  
Photoelectron Spectroscopy ◽  
Diffuse Reflectance ◽  
Diffuse Reflectance Spectroscopy ◽  
Dye Degradation ◽  
Analytical Techniques ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dye Pollutants ◽  
Transmission Electron ◽  
Uv Visible

Nanogold doped TiO2catalysts are synthesized, and their application in the photodegradation of dye pollutants is studied. The materials are characterized using different analytical techniques such as X-ray diffraction, transmission electron microscopy, UV-visible diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy. The results revealed the strong interaction between the metallic gold nanoparticles and the anatase TiO2support. Au doped systems showed very good photoactivity in the degradation of dye pollutants under UV irradiation as well as in sunlight. A simple mechanism is proposed for explaining the excellent photoactivity of the systems. The reusability studies of the photocatalysts exhibited more than 98% degradation of the dye even after 10 repeated cycles.

Titanium dioxide (TiO2)-decorated silver indium diselenide (AgInSe2): novel nano-photocatalyst for oxidative dye degradation

2018 ◽  
Vol 5 (9) ◽  
pp. 2242-2256 ◽  
Author(s):  
Anuraj S. Kshirsagar ◽  
Pawan K. Khanna
Keyword(s):  
Titanium Dioxide ◽  
Dye Degradation ◽  
Degradation Efficiency ◽  
Photocatalytic Dye Degradation

Novel titanium-dioxide-decorated silver indium diselenide nano-photocatalyst for enhancement in photocatalytic dye degradation efficiency of three different dyes, namely, MB, MO, and RhB.

scholarly journals Synthesis and Characterization of Nanostructure Tio2/Anthraquenone (AQ) Prepared by Sol-Gel Method

2017 ◽  
Vol 28 (1) ◽  
pp. 76
Author(s):  
Fadhela M. Hussein
Keyword(s):  
Sol Gel ◽  
X Ray Diffraction ◽  
First Order ◽  
Atomic Force ◽  
Rate Of Reaction ◽  
Ft Ir ◽  
Gel Technique ◽  
Uv Visible ◽  
Nano Titanium Dioxide

sol–gel technique conducted to synthesize nano titanium dioxide with anthraquenone (AQ) relatively in acidic pH. Nanoparticles were characterized using techniques like, Scanning Electrion Microscope (SEM), Atomic Force Microscope (AFM), UV-Visible Spectrioscopy, X-ray diffraction (XRD), Fourier transform infrared (FT-IR), SEM picture display that the TiO2/AQ is spherical in style, the band gap of TiO2/AQ nanoparticle is (3.05eV), BET and BJH analysis provides Pore volume and specific Surface area and the kinetic studie Suggest that the reaction is pseudo first order and the rate of reaction was reduce with rising initial concentration for p-Nitrotolune.

Synthesis, Characterization and Comparative Study of TiO2 and ZnO Nanoparticles and their Application as a Photocatalysts for a Trichromatic Dye

2020 ◽  
Vol 5 (3) ◽  
pp. 252-268
Author(s):  
Meriem Kouhail ◽  
El Ahmadi Zakia ◽  
Benayada Abbes
Keyword(s):  
Zno Nanoparticles ◽  
Diffuse Reflectance Spectroscopy ◽  
Dye Degradation ◽  
Sol Gel ◽  
Solar Irradiation ◽  
Operational Parameters ◽  
X Ray Diffraction ◽  
Aquatic Life ◽  
X Ray ◽  
Uv Visible

Background: The textile industrial effluents cause profound imbalances in ecosystems, when released into nature; dyes are oxidized by micro-organisms, resulting in a decrease in the dissolved oxygen, which is necessary for the aquatic life. For this reason, it is important to implement economic, efficient, and green methods ensuring both the discoloration and detoxification of water. Objective: TiO2 and ZnO nanoparticles were synthesized by sol-gel and precipitation methods, respectively. These two nanoparticles were used to compare photocatalytic degradation under UV and solar irradiation for three reactive azoic dyes (trichromatic): Reactive Bezactive Yellow (RBY), Reactive Bezactive Red (RBR), and Reactive Bezactive Blue (RBB). Methods: The structural, i.e., morphological surface properties of the synthesized photocatalysts were characterized by Fourier Transform Infrared, X-ray diffraction, UV-Visible diffuse reflectance spectroscopy, and Scanning Electron Microscopy. : X-ray diffraction shows that TiO2 has a tetragonal structure with an anatase form. The effects of some operational parameters, such as the amount of TiO2 and ZnO, initial dye concentration, dye mixtures, and pH, were examined. The progress of photodegradation reaction was monitored by UV-Visible spectroscopy for decolorization and by High-Performance Liquid Chromatography for degradation, and the efficiency of degradation was confirmed by Chemical Oxygen Demand measurement. Results: The dye degradation was found to be better in the presence of solar irradiation than under UV irradiation. The photocatalytic activity of ZnO was higher than TiO2 when used in its optimal conditions. Conclusion: The percentage of degradation of each dye is different, and the order of degradation of the three reactive dyes is as follows: RBY> RBR> RBB.

Preparation of TiO2 Decorated Eggshell Membrane for Photocatalytic Dye Degradation

2020 ◽  
Vol 1010 ◽  
pp. 508-513
Author(s):  
Ezatul Kamaliah Samsuddin ◽  
Siti Aida Ibrahim ◽  
Marsi Noraini ◽  
Anika Zafiah Mohd Rus
Keyword(s):  
Dye Degradation ◽  
Irradiation Time ◽  
Rutile Phase ◽  
Eggshell Membrane ◽  
X Ray Diffraction ◽  
Nano Composite ◽  
Fibrous Network ◽  
Organic Pollutants Removal ◽  
Photocatalytic Dye Degradation ◽  
Pollutants Removal

Pristine ESM was impregnated with TiO2 using the wet chemical method and subsequently calcined at 700 °C. All prepared samples were characterized using Field Emission Scanning Electron Microscope (FESEM), X-ray Diffraction (XRD) and UV-visible Spectrometer. FESEM images indicate the presence of a fibrous network that introduces useful adsorptive and photocatalytic properties for organic pollutants removal from water. The XRD result indicated that the TiO2 nano-composite contained only anatase and rutile phase. Photocatalytic results revealed that the photocatalytic activity of TiO2 increased under visible light irradiation in the presence of the carbonized eggshell membrane. It is found that TiO2-CESM produced the highest photocatalytic degradation of 93 % within 5 hours of irradiation time.

Biofabrication, characterization and evaluation of photocatalytic dye degradation efficiency of Syzygium alternifolium leaf extract mediated copper oxide nanoparticles

2019 ◽  
Vol 6 (6) ◽  
pp. 065034 ◽  
Author(s):  
Pulicherla Yugandhar ◽  
Thirumalanadhuni Vasavi ◽  
Bhasha Shanmugam ◽  
Palempalli Uma Maheswari Devi ◽  
Kesireddy Sathyavelu Reddy ◽  
...  
Keyword(s):  
Copper Oxide ◽  
Leaf Extract ◽  
Dye Degradation ◽  
Copper Oxide Nanoparticles ◽  
Degradation Efficiency ◽  
Oxide Nanoparticles ◽  
Photocatalytic Dye Degradation ◽  
Syzygium Alternifolium

scholarly journals Photocatalysis, photoinduced enhanced anti-bacterial functions and development of a selective m-tolyl hydrazine sensor based on mixed Ag·NiMn2O4 nanomaterials

RSC Advances ◽  
2020 ◽  
Vol 10 (51) ◽  
pp. 30603-30619
Author(s):  
Md Abdus Subhan ◽  
Pallab Chandra Saha ◽  
Md Anwar Hossain ◽  
M. M. Alam ◽  
Abdullah M. Asiri ◽  
...  
Keyword(s):  
Response Time ◽  
Dye Degradation ◽  
Degradation Efficiency ◽  
Photocatalytic Dye Degradation ◽  
Hydrazine Sensor

Photocatalytic dye degradation efficiency of Ag·NiMn2O4 at pH 4 was 91%; at pH 9, 77% and 95% in presence of H2O2 and at pH 7, 50%. Assembled Ag·NiMn2O4 nanomaterials/binder/GCE, as m-THyd sensor showed considerable sensitivity, DL, LDR, response time, reproducibility etc.

Enhancement of photocatalytic dye degradation efficiency of ZnO/Ag film deposited on flexible stainless steel meshes through g-C3N4 addition

2018 ◽  
Vol 6 (1) ◽  
pp. 016422 ◽  
Author(s):  
K Kalpana ◽  
K Ravichandran ◽  
E Sindhuja ◽  
K Shantha Seelan ◽  
K Jothivenkatachalam ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Dye Degradation ◽  
Degradation Efficiency ◽  
Photocatalytic Dye Degradation ◽  
Ag Film
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