The influence of experimental conditions on photocatalytic degradation of methylene blue using titanium dioxide particle

Yuangpho, N.; Trinh, Dang Trung Tri; Channei, Duangdao; Khanitchaidecha, Wilawan; Nakaruk, Auppatham

doi:10.1007/s41779-018-0184-5

Cited by 22 publications

(13 citation statements)

References 28 publications

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“…The degradation of MB was carried out for 2 h, with a close track by taking a 5 mL sample every 0.25 h using the Shimadzu-1700 UV-vis spectrophotometer. MB degradation was estimated by adsorption peak at 664 nm [ 14 ].…”

Section: Methodsmentioning

confidence: 99%

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Effect of annealing temperature on structural, optical, and photocatalytic properties of titanium dioxide nanoparticles

Muthee

Dejene

2021

Heliyon

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Titanium dioxide (TiO 2 ) nanoparticles (NPs) were produced by simple sol-gel technique and annealed for 2 h in air. The impact of annealing temperature on the physical, morphological, photocatalytic, and optical properties was studied. X-ray diffraction (XRD) measurements proved that a gradual phase change from anatase to rutile occurred with increased annealing temperature. The crystal structures of the NPs were found to change at different temperatures; anatase phase at 450 °C, mixed-phase (anatase/Rutile) at 550–650 °C, and rutile phase at 750 °C. The rise in the annealing temperature improved the crystallinity of the NPs. The crystal and grain size of the NPs increased with the annealing temperature hence reducing the specific surface area due to the condensed boundaries between subunits of the NPs. As per the Kubelka-Munk equation, the bandgap reduced as the temperature elevated. The photocatalytic activity of the NPs was higher in the anatase/rutile mixed-phase than in the single anatase and rutile phase. Experimental results indicated that annealing temperature could effectively change the properties of the TiO 2 NPs.

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Section: Methodsmentioning

confidence: 99%

“…( 13) oxygen vacancy concentration can be stated as a function of, PðO 2 Þ [28] in Eq. (14). where O 0 denotes the lattice oxygen, V o vacancies, ½V o represents the oxygen vacancy concentration; PðO 2 Þ designates the pressure of the oxygen vacancy.…”

Section: Eds Analysismentioning

confidence: 99%

Effect of annealing temperature on structural, optical, and photocatalytic properties of titanium dioxide nanoparticles

Muthee

Dejene

2021

Heliyon

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“…The photocatalytic activity of synthesized trinuclear Ti(IV) oxo-complexes have been estimated basing on the UV photoinduced degradation process of methylene blue (MB), which is widely used as a standard [35,36,37,38,39,40]. Hydrophobic properties of studied compounds caused that photocatalytic experiments were carried out using the polymer/TOCs composites produced by TOCs ( 1 – 3 ) microcrystals dispersion in the PMMA matrix.…”

Section: Resultsmentioning

confidence: 99%

Trinuclear Oxo-Titanium Clusters: Synthesis, Structure, and Photocatalytic Activity

2019

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The interest in titanium (IV) oxo-complexes is due to their potential application in photodegradation processes and environmental pollutants reduction. Titanium (IV) oxo-complexes (TOCs) of the general formula [Ti3O(OiPr)8(OOCR’)2] (R’ = -C13H9 (1), -p-PhCl (2), -m-PhNO2 (3), -C4H7 (4)) were synthesized and structurally characterized. The use of the different carboxylate ligands allowed modulating the optical band gaps of the produced microcrystals, which were measured via diffuse reflectance ultraviolet and visible spectroscopy (UV-Vis-DRS) and calculated using the density functional theory (DFT) method. The dispersion of TOCs (1–3) in the poly (methyl methacrylate) matrix (PMMA) led to the formation of polymer/TOCs composites, which in the next stage of our works have been applied in the photocatalytic activity estimation of synthesized trinuclear Ti(IV) oxo-complexes. Studies of the photocatalytic degradation of methylene blue (MB) induced by UV irradiation exhibit that the PMMA-TOCs composite containing (1) oxo-clusters is the most active, followed by the system containing the complex (3).

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“…The wastewater of textile industries, like painting, contains dangerous organic pollutants [1,2]. Methylene blue (MB) as one of the dye compounds is highly colored, toxic, carcinogenic, and hardly biodegradable with heterocyclic, aromatic, and cationic structures [1,3,4] used in wool, cotton, and silk painting that are potentially harmful to human in direct contact [2]. Therefore, they should be adequately treated before discharge to the environment [2].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the factors controlling the performance of a photoelectrocatalytic cell separated by UF membrane in degrading methylene blue

2020

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Methylene blue (MB) is a toxic and colorful organic matter that exists in the wastewater of textile industries. Difficult biodegradability of MB causes biological treatment methods that cannot sufficiently biodegrade it. In photoelectrocatalytic (PEC) methods, by converting the radiation energy to the electricity, MB is degraded efficiently in the anolyte chamber. Using the ultrafiltration (UF) membrane rather than a high-priced cation exchange membrane (CEM) decreases the cost of the PEC pilot. Therefore, in this study, different dependent and independent variables that affect the performance of the PEC are investigated to evaluate the technical feasibility of using ultra-filtration membrane as a separator of anode and cathode chambers. The results demonstrate an increase in the anolyte MB concentration up to 15 mg/l augments the PEC performance. In the best condition, the MB, turbidity, and color removal percent are 51.56%, 65.62%, and 64.19%, respectively, and produced power is 1.075 μW when the anolyte MB concentration, the pH, and the illumination density are 15 mg/l, 3, and 12 W, respectively. Also, the results indicate the removal percentage of the MB, turbidity, and color in either anolyte or catholyte rises in the anolyte acidic conditions and higher illumination densities. Besides, the changes in the EC and pH of anode and cathode chambers during the experiment are investigated, and finally, the relations between MB, color, and turbidity removal percentage are evaluated. As a result, it is found that the UF membrane is a suitable candidate to be used in PEC pilots.

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The influence of experimental conditions on photocatalytic degradation of methylene blue using titanium dioxide particle

Cited by 22 publications

References 28 publications

Effect of annealing temperature on structural, optical, and photocatalytic properties of titanium dioxide nanoparticles

Effect of annealing temperature on structural, optical, and photocatalytic properties of titanium dioxide nanoparticles

Trinuclear Oxo-Titanium Clusters: Synthesis, Structure, and Photocatalytic Activity

Analysis of the factors controlling the performance of a photoelectrocatalytic cell separated by UF membrane in degrading methylene blue

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