Photocatalytic Decolorization of Two Remazol Dyes Using TiO2 Impregnated Pumice Composite as Catalyst

2019 ◽  
pp. 125-136
Author(s):  
Deniz İzlen Çifçi ◽  
Sema Terzi ◽  
Süreyya Meriç
Keyword(s):  
Photocatalytic Decolorization

Photocatalytic Decolorization of an Azo Dye Derivative, Acid Yellow 29 in Aqueous Suspension of Titania

2014 ◽  
Vol 3 (1) ◽  
pp. 115-122
Author(s):  
Abuzar Khan ◽  
Niyaz Mir ◽  
Mohammad Muneera ◽  
Zaki Seddigi
Keyword(s):  
Azo Dye ◽  
Aqueous Suspension ◽  
Photocatalytic Decolorization

scholarly journals Photocatalytic Decolorization of Methyl Red on Nanoporous Anodic ZrO2 of Different Crystal Structures

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 215
Author(s):  
Ewa Wierzbicka ◽  
Karolina Syrek ◽  
Klaudia Mączka ◽  
Grzegorz D. Sulka
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Performance ◽  
Elevated Temperatures ◽  
Aqueous Electrolyte ◽  
High Surface ◽  
High Surface Area ◽  
Methyl Red ◽  
Self Organized ◽  
Photocatalytic Decolorization ◽  
Perfect Adhesion

High surface area, self-organized nanoporous ZrO2 arrays with perfect adhesion to the Zr substrate were synthesized by anodization in an aqueous electrolyte containing (NH4)2SO4 and NH4F. The obtained semiconductor materials were tested as photocatalysts for decolorization of the methyl red (MR) as a model azo dye pollutant. It was demonstrated that as-synthesized anodic ZrO2 anodic layers are already crystalline and, therefore, do not require further thermal treatment to provide a high photocatalytic performance. However, photocatalytic efficiency could be improved by annealing at a relatively low-temperature of 350 °C. Higher annealing temperatures caused a gradual drop of photocatalytic activity. The photocatalytic behavior was correlated with the crystal phase transformation in anodic ZrO2. It was found that higher photocatalytic activity was observed for the tetragonal phase over the monoclinic phase (predominant at elevated temperatures). It results from the optimal and complex electronic structure of annealed ZrO2 with three different energy states having absorption edges at 2.0, 4.01 and 5.28 eV.

Photocatalytic decolorization of methylene blue using immobilized ZnO nanoparticles prepared by solution combustion method

2012 ◽  
Vol 44 (1-3) ◽  
pp. 174-179 ◽  
Author(s):  
Abbas Rezaee ◽  
Hossein Masoumbeigi ◽  
Reza Darvishi Cheshmeh Soltani ◽  
Ali R. Khataee ◽  
Seyedjamalodin Hashemiyan
Keyword(s):  
Methylene Blue ◽  
Zno Nanoparticles ◽  
Combustion Method ◽  
Solution Combustion ◽  
Solution Combustion Method ◽  
Photocatalytic Decolorization

Synthesis of titanate/anatase composites with highly photocatalytic decolorization of dye under visible light irradiation

2008 ◽  
Vol 460 (1-2) ◽  
pp. 491-495 ◽  
Author(s):  
Youjun Yan ◽  
Xiaoqing Qiu ◽  
Hui Wang ◽  
Liping Li ◽  
Xianzhi Fu ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Photocatalytic Decolorization

Preparation and Photocatalytic Activity of TiO2/Opal Composite

2013 ◽  
Vol 668 ◽  
pp. 13-16
Author(s):  
Qing Shan Li ◽  
Biao Zhan ◽  
Wei Hong ◽  
Guang Zhong Xing
Keyword(s):  
Methylene Blue ◽  
Uv Light ◽  
Sol Gel ◽  
Tetrabutyl Titanate ◽  
Methylene Blue Solution ◽  
Photocatalytic Decolorization ◽  
Uv Light Irradiation ◽  
Photocatalytic Activities ◽  
Blue Solution ◽  
Gel Technique

Opal as a carrier, tetrabutyl titanate as a titanium source, TiO2 loaded on opal was prepared by sol-gel technique. The photocatalysts were characterized by XRD, TEM and UV-VIS absorption spectrum. Their photocatalytic activities were examined by the photocatalytic decolorization of methylene blue solution under UV light irradiation. The effects of calcination temperature, the amount of TiO2 loading and pH on photocatalytic activities were discussed. The results show that TiO2 supported on opal induced enhancement of photocatalytic decolorization rant and TiO2 doping is about 30 wt. % with 92.15% of decolorization rate at 700°C.

Chemical state analysis, optical band gap, and photocatalytic decolorization of cobalt-doped ZnO nanospherical thin films by DC/RF sputtering technique

Optik ◽  
2018 ◽  
Vol 164 ◽  
pp. 143-154 ◽  
Author(s):  
Asim Jilani ◽  
M.Sh. Abdel-wahab ◽  
H.Y. Zahran ◽  
I.S. Yahia ◽  
Attieh A. Al-Ghamdi ◽  
...  
Keyword(s):  
Thin Films ◽  
Band Gap ◽  
Optical Band Gap ◽  
Rf Sputtering ◽  
Chemical State ◽  
Photocatalytic Decolorization ◽  
Doped Zno ◽  
State Analysis

ZnO-SiO2/Laponite Photocatalyst: Kinetic Study on Photocatalytic Decolorization of Methylene Blue

2014 ◽  
Vol 896 ◽  
pp. 541-544
Author(s):  
Is Fatimah ◽  
N. Nunani Yuyun
Keyword(s):  
Methylene Blue ◽  
Energy Dispersive Spectrometry ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
X Ray ◽  
Photocatalytic Decolorization ◽  
Uv Visible ◽  
Gel Preparation ◽  
Adsorption Desorption

ZnO-SiO2/Laponite was prepared by sol-gel preparation procedure consit of SiO2 pillarization to laponite followed by ZnO dispersion by using zinc acetate as precursor. The obtained material was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), diffuse reflectance UV-Visible (DRUV-Vis) and N2 adsorption-desorption analysis. The photocatalytic performance of the amterial in methylene blue decolorization was also investigated. Compared with ZnO-SiO2 nanoparticles, it is concluded that ZnO-SiO2/Laponite possess higher photocatalytic activity which obey Temkin isotherm model.

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