Enhanced Photocatalytic Activity of Two Dimensional SrTiO3 Nano Structures for Dye Degradation

2021 ◽  
Author(s):  
Y. AlIssa ◽  
S. T. Sajjadian ◽  
S. M. Hamidi ◽  
S. Sadeghi ◽  
M. R. Nabid
Keyword(s):  
Photocatalytic Activity ◽  
Rhodamine B ◽  
Dye Degradation ◽  
Semiconductor Material ◽  
Two Dimensional ◽  
Plasmonic Material ◽  
Nano Structures ◽  
Rhodamine B Dye ◽  
Degradation Ability ◽  
Made In

Abstract The combination of the properties of nanostructures, photocatalytic semiconductors, and plasmonic materials can significantly contribute to improving the performance of the entire photocatalysis process. We tried to produce a unique catalyst by combining these three properties. We have produced a two-dimensional nanostructure which was then coated with gold as a plasmonic material followed by SrTiO3 as semiconductor material. The result was the production of the first catalyst of its kind made in this way, which offered notable results. The degradation ability of the sample was examined with different degrees of pH of rhodamine B dye, where we achieved the highest degradation, 16%, at pH10.

scholarly journals Palladium-Supported Zirconia-Based Catalytic Degradation of Rhodamine-B Dye from Wastewater

Water ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1522
Author(s):  
Salma Jabeen ◽  
Muhammad Sufaid Khan ◽  
Rozina Khattak ◽  
Ivar Zekker ◽  
Juris Burlakovs ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Rhodamine B ◽  
Dye Degradation ◽  
Freundlich Isotherm ◽  
Impregnation Method ◽  
K Value ◽  
First Order Kinetics ◽  
Good Catalytic Activity ◽  
Rhodamine B Dye ◽  
Best Fit

The catalytic activity of Pd/ZrO2 was studied in terms of the degradation of rhodamine-B dye in the presence of hydrogen peroxide. Pd/ZrO2 was prepared by impregnation method, calcined at 750 °C and characterized by XRD, SEM and EDX. The catalyst showed good catalytic activity for dye degradation at 333 K, using 0.05 g of the catalyst during 5 h. The reaction kinetics followed the pseudo-first order kinetics. The Freundlich, Langmuir and Temkin isotherms were applied to the data and the best fit was obtained with Freundlich isotherm. Thermodynamic parameters, like ΔH, ΔG and ΔS were also calculated. The negative values of ΔH (−291.406 KJ/mol) and Gibbs free energy (ΔG) showed the exothermic and spontaneous nature of the process. The positive ΔS (0.04832 KJ/mol K) value showed suitable affinity of catalyst for dye degradation. The catalyst was very stable, active and was easily separated from the reaction mixture by filtration. It can be concluded from the results that the prepared catalyst could be effectively used in dyes degradation/removal from water subjected to further validation and use for various dyes.

Structure, morphology features and photocatalytic properties of α-Ag2WO4 nanocrystals-modified Palygorskite clay

2021 ◽  
Vol 02 ◽  
Author(s):  
Amanda Carolina Soares Jucá ◽  
Francisco Henrique Pereira Lopes ◽  
Herbert Vieira Silva-Júnior ◽  
Lara Kelly Ribeiro Silva ◽  
Elson Longo ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Rhodamine B ◽  
Dye Degradation ◽  
Degradation Kinetics ◽  
Low Cost ◽  
Catalytic Efficiency ◽  
Photocatalytic Properties ◽  
Impregnation Method ◽  
Heat Treated ◽  
Modified Palygorskite

Aims: In the present study, we investigate the photocatalytic properties of α-Ag2WO4 nanocrystals-modified Palygorskite (PAL) clay synthesized by the impregnation method. The PAL clay was chemically purified and heat-treated (500 ºC for 2 h), which served as an excellent supporting matrix for loading α-Ag2WO4(α-AWO) nanocrystals. Background: Water contamination is one of the most serious problems affecting human health, ecosystem survival, and the economic growth of societies. Industrial effluents, such as textile dyes, when not treated and improperly discharged into water resources are considered the main cause of water pollution. Thus the scientific community has been developing effective remediation technologies based on advanced oxidative processes to reduce the harmful effects of these organic pollutants. Objective: Improve the photocatalytic activity of PAL clay with α-AWO nanocrystals to degradation of Rhodamine B (RhB) dye. Methods: We purify and heat-treated the PAL clay, synthesize nanocrystals ofα-AWO nanocrystals and modify PAL clay with 30% α-AWO nanocrystals by the impregnation method. The modified PAL clay was able to improve RhB dye degradation. The materials were characterized by XRD, RAMAN,FE-SEM, FT-IR, XRF, etc. The samples were used as photocatalysts under UV-C lamps for the degradation of RhB dye in order to analyze its catalytic performances. Results: ThePAL clay modified with 30% α-AWO nanocrystals showed a catalytic efficiency of 79%, and degradation kinetics about 16 times higher when compared to PAL-500 only purified and heat-treated at 500 ºC. In this way, this PAL-modified is an alternative as a low-cost photocatalyst for the degradation of RhB dye. Conclusion: Ultraviolet-Visiblespectra revealed that our materials have opticalband gap energies controlled by indirect and direct electronic transitions and suitable to be activated under ultraviolet illumination. The adequate amount (30 wt.%) of α-Ag2WO4 nanocrystals added to PAL brought significant improvement of photocatalytic activity for the degradation of rhodamine B. Finally, a photocatalytic mechanism was proposed in detail.

Facile preparation of ZnO nanosheets and its photocatalytic activity in the degradation of rhodamine B dye under UV irradiation

2016 ◽  
Vol 12 (6) ◽  
pp. 784-788 ◽  
Author(s):  
Rizwan Khan ◽  
Sudarsan Raj ◽  
Jin Hyeon Yun ◽  
Yeon-Tae Yu ◽  
Joo In Lee ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Uv Irradiation ◽  
Rhodamine B ◽  
Zno Nanosheets ◽  
Facile Preparation ◽  
Rhodamine B Dye

scholarly journals Iron oxide nanocatalyst with titanium and silver nanoparticles: Synthesis, characterization and photocatalytic activity on the degradation of Rhodamine B dye

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Pâmela Cristine Ladwig Muraro ◽  
Sérgio Roberto Mortari ◽  
Bruno Stefanello Vizzotto ◽  
Gabriela Chuy ◽  
Cristiane dos Santos ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Photocatalytic Activity ◽  
Iron Oxide ◽  
Rhodamine B ◽  
Nanoparticles Synthesis ◽  
Rhodamine B Dye

Heterojunction of BiPO 4 /BiOBr photocatalysts for Rhodamine B dye degradation under visible LED light irradiation

2019 ◽  
Vol 67 (6) ◽  
pp. 1016-1023 ◽  
Author(s):  
Hong‐jian Zhao ◽  
Ren‐Jang Wu ◽  
Xu‐Cheng Wang ◽  
Yu‐min An ◽  
Wen‐Xia Zhao ◽  
...  
Keyword(s):  
Rhodamine B ◽  
Dye Degradation ◽  
Light Irradiation ◽  
Led Light ◽  
Rhodamine B Dye

Dye Degradation Using Ag/ZnO Illuminated by Fluorescent Lamps

2015 ◽  
Vol 749 ◽  
pp. 206-210
Author(s):  
Pongsaton Amornpitoksuk ◽  
Sumetha Suwanboon
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Rhodamine B ◽  
Dye Degradation ◽  
Reactive Orange 16 ◽  
Fluorescent Lamps ◽  
Zno Powders ◽  
Reactive Orange ◽  
Better Than ◽  
Dye Solutions

Heterostructure of Ag/ZnO was synthesized by a reduction of Tollen’s reagent on ZnO powders. The photocatalytic activity of Ag/ZnO was investigated through the degradation of three different dye solutions (methylene blue, rhodamine B and reactive orange 16) under visible light using the fluorescent lamps with a 420 nm longpass filter. The efficiencies of dye degradations for all three dyes by Ag/ZnO are better than that of pure ZnO. Furthermore, the parameters including photocatalyst loadings and initial pHs of dye solutions were also studied. The photocatalytic degradations for all three dyes were increased with the increasing of catalyst loadings. The effect of pHs on photocatalytic activity of Ag/ZnO can be explained by the interaction between the charge on the surface of photocatalyst and the charge of dye ions.

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