scholarly journals Synthesis, Characterization and Methyl Orange Degradation Activity of Ti-Al Oxides Nanomaterial

2019 ◽  
Vol 16 (3) ◽  
pp. 252-260 ◽  
Author(s):  
Buzuayehu Abebe ◽  
H C Ananda Murthy
Keyword(s):  
Methyl Orange ◽  
Analytical Techniques ◽  
Reaction Rate Constant ◽  
Degradation Efficiency ◽  
Impregnation Method ◽  
Methyl Orange Degradation ◽  
Ft Ir ◽  
Degradation Activity ◽  
Size Of Particles ◽  
Xrd Patterns

The present work reports the synthesis of Ti-Al Oxides (TAOs) nanomaterial by an organic solvent-free impregnation method. The as-prepared products were studied by XRD, SEM-EDAX, UV-Vis, and FT-IR analytical techniques. XRD patterns revealed the fact that both TiO2 (TO)and TAOs exhibited almost similar peaks with the exception to minor peak difference in width and height which could be attributed to the alteration in the size of particles. At the calcination temperature of 500 oC, the absence of peaks for Al2O3 (AO) in the TAOs XRD pattern indicates the amorphous nature of AO. However, the appearance of Ti, Al, and O on EDAX and redshift on UV-Vis spectra confirm the successful impregnation of AO on TO. The pollutant degradation ability of TAOs photocatalyst was tested on methyl orange (MO) dye. Compared to pure TO, TAO composite has greater degradation efficiency. However, as the percentage of AO increases the degradation efficiency decreases. The conducted Langmuir model test was found to fit well for the photocatalytic reaction process following first-order reaction kinetics. Comparing the values for kinetics constant with earlier work, this work showed good MO degradation efficiency with reaction rate constant (k) values of 0.023.

The Degradation of Methyl Orange with NiO/γ-Al2O3 Photocatalyst by Plasma-Assisted Preparation

2012 ◽  
Vol 503-504 ◽  
pp. 629-632
Author(s):  
Dan Yang Xie ◽  
Qiu Rong Li ◽  
Hai Yan Xiao ◽  
Hong Xiao Lu ◽  
Ran Ran Wang
Keyword(s):  
High Pressure ◽  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Influence Factors ◽  
Impregnation Method ◽  
Mercury Lamp ◽  
Methyl Orange Degradation ◽  
Ft Ir ◽  
Analytical Tools ◽  
Degradation Of Methyl Orange

This paper reports NiO/γ-Al2O3 photocatalysts have well photocatalytic degradation capacity. NiO/γ-Al2O3 catalysts were prepared by Ni(NO3)2•6H2O,γ-Al2O3 with the impregnation method, and treated by the plasma-assisted, which were characterized by XRD, FT-IR,BET and other analytical tools. The influence factors of methyl orange degradation efficiency were analyzed under the 250W high-pressure mercury lamp.

scholarly journals Straightforward Synthesis of Mn3O4/ZnO/Eu2O3-Based Ternary Heterostructure Nano-Photocatalyst and Its Application for the Photodegradation of Methyl Orange and Methylene Blue Dyes

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4661
Author(s):  
Jayachamarajapura Pranesh Shubha ◽  
Haralahalli Shivappa Savitha ◽  
Syed Farooq Adil ◽  
Mujeeb Khan ◽  
Mohammad Rafe Hatshan ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Methyl Orange ◽  
Irradiation Time ◽  
Solar Irradiation ◽  
Anionic Dyes ◽  
One Pot ◽  
Sunlight Irradiation ◽  
Ft Ir ◽  
Degradation Activity ◽  
Ecological Applications

Zinc oxide-ternary heterostructure Mn3O4/ZnO/Eu2O3 nanocomposites were successfully prepared via waste curd as fuel by a facile one-pot combustion procedure. The fabricated heterostructures were characterized utilizing XRD, UV–Visible, FT-IR, FE-SEM, HRTEM and EDX analysis. The photocatalytic degradation efficacy of the synthesized ternary nanocomposite was evaluated utilizing model organic pollutants of methylene blue (MB) and methyl orange (MO) in water as examples of cationic dyes and anionic dyes, respectively, under natural solar irradiation. The effect of various experimental factors, viz. the effect of a light source, catalyst dosage, irradiation time, pH of dye solution and dye concentration on the photodegradation activity, was systematically studied. The ternary Mn3O4/ZnO/Eu2O3 photocatalyst exhibited excellent MB and MO degradation activity of 98% and 96%, respectively, at 150 min under natural sunlight irradiation. Experiments further conclude that the fabricated nanocomposite exhibits pH-dependent photocatalytic efficacy, and for best results, concentrations of dye and catalysts have to be maintained in a specific range. The prepared photocatalysts are exemplary and could be employed for wastewater handling and several ecological applications.

scholarly journals Morphology dependent photocatalytic efficacy of zinc ferrite probed for methyl orange degradation

2018 ◽  
Vol 83 (11) ◽  
pp. 1261-1271
Author(s):  
Huan-Yan Xu ◽  
Bo Li ◽  
Ping Li
Keyword(s):  
Methyl Orange ◽  
Crystallite Size ◽  
Surface Area ◽  
Zinc Ferrite ◽  
Average Crystallite Size ◽  
Photocatalytic Efficiency ◽  
X Ray Diffraction ◽  
Methyl Orange Degradation ◽  
Xrd Patterns ◽  
Calculated Average

Zinc ferrite (ZnFe2O4) photocatalysts with different morphologies (sizes and shapes) were synthesized to explore the effect of morphology on their photocatalytic efficiency. The results obtained using field emission scanning electron microscopy (FESEM) revealed that the obtained samples had the needle-, cube-, granule- and plate-like morphology, labeled as NZFO, CZFO, GZFO and PZFO, respectively. X-ray diffraction (XRD) patterns showed that all the samples had the spinel structure of ZnFe2O4 without any other impurities. The calculated average crystallite size followed the order NZFO<GZFO<CZFO< <PZFO. The surface area was inversely proportional to the average crystallite size and followed the order NZFO>GZFO>CZFO>PZFO. The photocatalytic efficiency for the degradation of methyl orange also followed the order NZFO> >GZFO>CZFO>PZFO. The morphology-dependent photocatalytic efficiency of ZnFe2O4 was closely related with its crystallite size and surface area. The smaller the crystallite size was, the larger the surface area was, and the higher the photocatalytic efficiency was.

Adsorptive CuO/CuAl2O4 Nanoparticles for the Separation of Aqueous Methyl Orange

2016 ◽  
Vol 12 ◽  
pp. 21-32
Author(s):  
Samvit G. Menon ◽  
K.S. Choudhari ◽  
Suresh D. Kulkarni ◽  
C. Santhosh
Keyword(s):  
Methyl Orange ◽  
Nitrogen Adsorption ◽  
X Ray Diffraction ◽  
Simple Method ◽  
X Ray ◽  
Quantitative Separation ◽  
Ft Ir ◽  
Xrd Patterns ◽  
Co Precipitation ◽  
Ir Spectroscopic

A simple method for the separation of aqueous methyl orange, an azo dye, is reported, where CuO/CuAl2O4 nanoparticles synthesisedby co-precipitation methodwere used as the adsorbent. The presence of cubic CuAl2O4 (CAO) and monoclinic CuO phase of this composite material was confirmed by X-Ray diffraction and its specific surface area wasdetermined by BET nitrogen adsorption method.To study the nature of surface charge, theisoelectric point of the material was determined using the pH drift methodfollowing which the rate of decolouration was studied forpH 5and pH 7. Theexperiments in the absence oflight show that adsorption of the dye is prevalent even up to 6h leading to 86% decolouration.A methanolic extraction was effectivefor quantitative separation ofadsorbed dye fromCuO/CuAl2O4 nanoparticles regenerating them for reuse. The presence of methyl orange in the extracted solution and on the nanoparticles at various stages was verified byUV-Visible and FT-IR spectroscopic methods.The extent of adsorption was quantified and found tobe as high as 86%. The catalyst aftercomplete extraction ofmethyl orange (MO),could be reused for the decolouration. Stability of the nanoparticles after reuse was verified by the closematch of XRD patterns ofthe pure and reused CAOwhich show no significant changes in itscrystal structure. The separation method shown here can be extended for the removal of other azo dyesfrom textile effluents.

Preparation of TiO2 and HZSM-5 Mixture and Methyl Orange Degradation Activity

2012 ◽  
Vol 485 ◽  
pp. 80-83
Author(s):  
Wen Jie Zhang ◽  
Ke Xin Li
Keyword(s):  
Methyl Orange ◽  
Solid State ◽  
Pure Tio2 ◽  
Doping Amount ◽  
Methyl Orange Degradation ◽  
Degradation Activity

HZSM-5 zeolite was prepared by modification of NaZSM-5 with NH4Cl and was used as support for TiO2. Maximum decoloration rates appeared when using 200 mg/l TiO2 in both photocatalysts. At TiO2 concentration below 130 mg/l, pure TiO2 could degrade more methyl orange molecules in the solution than using mixture of TiO2 and HZSM-5. At even higher photocatalyst concentrations, the mixture performed better decoloration activity than using pure TiO2. After 70 min of irradiation, nearly all of the initial methyl orange was degraded on the two photocatalysts. When using mixed photocatalysts prepared by solid state dispersion, adsorption of methyl orange was nearly constant in all the HZSM-5 using amount, which was not more than 3% of the initial methyl orange. Decoloration of methyl orange increased constantly with increasing HZSM-5 doping amount.

Preparation and Characterization of H3PW12O40/TiO2-M (M=Fe, Co, Ni, Zn) and Photocatalytic Activity for Methyl Orange Decomposition

2014 ◽  
Vol 1073-1076 ◽  
pp. 202-209 ◽  
Author(s):  
Si Jing Chen ◽  
Qiang Gan ◽  
Hai Ru Shang ◽  
Xia Liu
Keyword(s):  
Methyl Orange ◽  
Metal Ion ◽  
Ph Value ◽  
Anatase Phase ◽  
Sol Gel ◽  
Impregnation Method ◽  
X Ray Diffraction ◽  
First Order Kinetics ◽  
Ft Ir ◽  
Catalyst Dosage

Composites H3PW12O40/TiO2-M (M=Fe, Co, Ni, Zn) were synthesized by combining sol-gel technology with impregnation method. The structures and properties were characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy and UV-Vis diffuser reflectance spectrum (UV-Vis DRS). The XRD and FT-IR results showed that the TiO2 particles had the anatase phase, and the Keggin structure of H3PW12O40 remained intact. The UV-Vis DRS results indicated that compared with pure TiO2, an obvious red shift occurred after introducing H3PW12O40. The composites were used as heterogeneous photocatalyst to the degradation of methyl orange, and the influences of catalyst dosage, H3PW12O40 loading and metal ion species were studied. Results show that, under the optimum parameters pH value 2.00, 0.4 g·L-1 catalyst dosage and 30% H3PW12O40 loading, 96.6% methyl orange was degraded after 30 min irradiation (365 nm) using composite H3PW12O40/TiO2-Zn. The photodegradation process fitted Langmuir-Hinshelwood first order kinetics.

Photocatalytic Degradation of the Methyl Orange Solution Using Heteropoly Acid Supported on Molecular Sieve as Catalyst

2013 ◽  
Vol 295-298 ◽  
pp. 1337-1340
Author(s):  
Yan Qin Huang
Keyword(s):  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Irradiation Time ◽  
Methyl Orange Solution ◽  
High Catalytic Activity ◽  
Impregnation Method ◽  
Initial Concentration ◽  
Degradation Activity ◽  
Catalyst Dosage ◽  
Catalyst Load

Photochemical catalyst PW/MCM-41 is prepared by impregnation method, and its photocatalytic degradation activity to methyl orange is studied. Results show that catalyst load, catalyst dosage，amount of H2O2, initial concentration of methyl orange and irradiation time are important factors for photocatalytic degradation. The best reaction conditions are: the catalyst load is 40%, the catalyst dosage is 5.0 g/L, the H2O2 dosage is 6.0 g/L, the initial concentration of methyl orange is 10 mg/L，and the irradiation time is 150 min. Under such conditions, the photocatalytic degradation rate could reach 84%. The catalyst exhibits high catalytic activity.

scholarly journals New Surface Aspects towards Photocatalytic Activity of Doped Supported Titanium Dioxide

2016 ◽  
Vol 2016 ◽  
pp. 1-9
Author(s):  
Samia A. Kosa ◽  
Eman Z. Hegazy ◽  
Saleha S. Maashi ◽  
Islam H. Abd El Maksod ◽  
Laila M. Al-Harbi
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Photocatalytic Oxidation ◽  
Organic Pollutant ◽  
Oxide System ◽  
Impregnation Method ◽  
Vis Spectroscopy ◽  
Before And After ◽  
Ft Ir ◽  
Frame Work

The present work aims to synthesize nanoscale well dispersed TiO2/SiO2and TiO2/Al2O3nanoparticle photocatalysts via an impregnation method for the removal of methyl orange, which was used as a model compound of organic pollutant in wastewater, from an aqueous medium. Also within this frame work, La and Ce metals were loaded onto the surfaces of TiO2/SiO2and TiO2/Al2O3by an impregnation method to enhance the photocatalytic activity of the nanoparticles; the activities and physicochemical properties of the photocatalysts were compared before and after loading of metallic La and Ce. The oxide system was characterized by different techniques, including XRD, UV-Vis spectroscopy, FT-IR spectroscopy, SEM, and EDX spectroscopy. Finally, the optimal conditions to complete the photocatalytic oxidation of methyl orange dye were studied. This work holds promise for the efficient photodegradation of pollutants by nanoparticle photocatalysts.

Photocatalytic Activity of TiO2/Ti Film Prepared by Sol-Gel Method on Methyl Orange Degradation

2011 ◽  
Vol 214 ◽  
pp. 65-69 ◽  
Author(s):  
Wen Jie Zhang ◽  
Bo Yang ◽  
Jia Wei Bai
Keyword(s):  
Methyl Orange ◽  
Tio2 Film ◽  
Uv Light ◽  
Sol Gel ◽  
Titanium Substrate ◽  
Dip Coating ◽  
Methyl Orange Degradation ◽  
Photocatalytic Activities ◽  
Weak Activity ◽  
Degradation Activity

TiO2 film was deposited on titanium substrate by a sol-gel dip-coating process. Photocatalytic activities of the films prepared with and without template were compared. The TiO2 film deposited on Ti substrate obviously could not adsorb methyl orange on its surface and the titanium substrate had very weak activity under UV light irradiation. The TiO2 films prepared without the addition of PEG1000 were calcinated at 450 oC, 500 oC, 550 oC, and 600 oC and the film calcinated at 500 oC showed the optimum photocatalytic degradation activity. The addition of PEG1000 could promote degradation of methyl orange that can be attributed to the possible pore forming in the TiO2 film.

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