Variation of pH and Composite Dosage on the Photocatalytic Activity for ZnO/epoxy Nanocomposites

In this research, Zinc oxide (ZnO)/epoxy nanocomposite was synthesized by simple casting method with 2wt. % ZnO concentration. The aim of this work was to study the effect of pH and composite dosage on the photocatalytic activity of ZnO/ epoxy nanocomposite. Scanning electron microscopy (SEM) technique images proof the homogeneous distribution of ZnO nanoparticles in epoxy. A synthesized nanocomposite samples were characterized by Fourier Transform Infrared spectrometer (FTIR) measurements. Two spectra for epoxy and 2wt.% ZnO/epoxy nanocomposites were similar and there are no new bonds formed from the incorporation of ZnO nanoparticles. Using HCl and NaOH were added to Methylene blue (MB) dye (5ppm) to gat pH values 3 and 8. The degradation of the dye was 90.816% were pH =8 after 180 min. under sun-light. The degradation was 6.131% were pH=3 after 240 min. under sun-light irradiation. It is found that the base solution help in accelerating the photocatalytic process, pH with high value provides greater concentration of hydroxyl ions which interact with h+ to form hydroxyl radicals OH- that give an enhancement degradation rate of dyes. The dose of ZnO was increased from 3g to 6g with Methylene blue MB (5ppm) the degradation was 94.3755% after 240 min. under sun-light irradiation. This means that increasing the dose of ZnO, the photocatalytic activity will be increased.

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Photocatalytic Degradation of Methylene Blue by NiO Thin Films under Solar Light Irradiation

Journal of Nano Research ◽

10.4028/www.scientific.net/jnanor.56.152 ◽

2019 ◽

Vol 56 ◽

pp. 152-157 ◽

Cited By ~ 5

Author(s):

Abdelouahab Noua ◽

Hichem Farh ◽

Rebai Guemini ◽

Oussama Zaoui ◽

Tarek Diab Ounis ◽

...

Keyword(s):

Thin Films ◽

Methylene Blue ◽

Photocatalytic Activity ◽

Sol Gel ◽

Visible Region ◽

Optical Transmittance ◽

Dip Coating ◽

Light Irradiation ◽

Solar Light ◽

Solar Light Irradiation

Nickel oxide (NiO) thin films were successfully deposited by sol-gel dip-coating method on glass substrates. The structural, morphological and optical properties in addition to the photocatalytic activity of the prepared films were investigated. The results show that the films have a polycrystalline NiO cubic structure with dense NiO grains and average optical transmittance in the visible region. The photocatalytic properties of the films were studied through the degradation of methylene blue and 89% of degradation was achieved for 4.5h of solar light irradiation exposure which indicates the capability of NiO photocatalytic activity.

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Photocatalytic Degradation of Methylene Blue over Co-Ag3VO4 under Visible Light Irradiation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.335-336.1385 ◽

2011 ◽

Vol 335-336 ◽

pp. 1385-1390 ◽

Cited By ~ 1

Author(s):

Shuo Wiei Zhao ◽

Hui Xu ◽

Hua Ming Li ◽

Yuan Guo Xu

Keyword(s):

Methylene Blue ◽

Photocatalytic Activity ◽

Visible Light ◽

Visible Light Irradiation ◽

Absorption Edge ◽

Diffuse Reflectance Spectroscopy ◽

Dye Degradation ◽

Light Irradiation ◽

Experimental Conditions ◽

X Ray

In order to improve the photocatalytic activity, Co was successfully loaded into Ag3VO4 by using impregnation process. The samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDS) and diffuse reflectance spectroscopy (DRS). The XRD and SEM–EDS analyses revealed that Co ion was dispersed on Ag3VO4. The DRS results indicated that the absorption edge of the Co–Ag3VO4 catalyst shifted to longer wavelength. The enhanced photocatalytic activity of Co–Ag3VO4 for Methylene Blue(MB) dye degradation under visible light irradiation was due to its wider absorption edge and higher separation rate of photo-generated electron and holes. In the experimental conditions, it is demonstrated that the MB was effectively degraded by more than 95% within 40 min when the Co–Ag3VO4 catalyst was calcined at 300°C with 1 wt.% Co content.

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Photocatalytic Degradation of Methylene Blue and Methyl Orange by Y-PTC Metal-Organic Framework

Jurnal Kimia VALENSI ◽

10.15408/jkv.v7i2.22267 ◽

2021 ◽

Vol 7 (2) ◽

pp. 129-141

Author(s):

Adawiah Adawiah ◽

Muhammad Derry Luthfi Yudhi ◽

Agustino Zulys

Keyword(s):

Methylene Blue ◽

Photocatalytic Activity ◽

Methyl Orange ◽

Visible Light ◽

Visible Light Irradiation ◽

Metal Organic Framework ◽

Light Irradiation ◽

Bandgap Energy ◽

Metal Organic ◽

Organic Framework

The yttrium based metal-organic framework (MOF) Y-PTC was synthesized by the solvothermal method using perylene as the linker and yttrium as metal ion. This study aims to assess the photocatalytic activity of yttrium-perylenetetracarboxylate (Y-PTC) metal-organic framework (MOF) toward methylene blue and methyl orange under visible light irradiation. The results of the FTIR analysis showed that Y-PTC MOF had a different structure and composition from its precursor (Na4PTC). The Y-PTC MOF has a bandgap energy value of 2.20 eV with a surface area of 47.7487 m2/g. The SEM-EDS analysis showed an elemental composition of yttrium, carbon, and oxygen, were 6.9%, 72.1% and 20.7%, respectively. Furthermore, Y-PTC MOF was able to adsorb dyes at the optimum by 78.10% and 35.57% toward methylene blue (MB) and methyl orange (MO) at the dispersion period of 60 mins. Y-PTC MOF exhibited photocatalytic activity towards the degradation of methylene blue and methyl orange under visible light irradiation. The addition of H2O2 inhibited Y-PTC photocatalytic activity towards MO degradation from 50.89% to 26.38%. In contrast to MO, the addition of H2O2 had a positive effect on MB, which increased the degradation from 87.56% to 91.65%. Therefore, Y-PTC MOF possessed the potential of a photocatalyst material in dyes degradation under visible light irradiation.

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High Photocatalytic Activity of Heterostrutured InMoO3-Tio2 Nanocomposite Material Under Natural Sun Light Irradiation

Canadian Chemical Transactions ◽

10.13179/canchemtrans.2015.03.02.0223 ◽

2015 ◽

pp. 327-339

Keyword(s):

Photocatalytic Activity ◽

High Photocatalytic Activity ◽

Nanocomposite Material ◽

Light Irradiation ◽

Sun Light

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Visible-enhanced photocatalytic performance of CuWO4/WO3 hetero-structures: incorporation of plasmonic Ag nanostructures

New Journal of Chemistry ◽

10.1039/c8nj01656a ◽

2018 ◽

Vol 42 (13) ◽

pp. 11109-11116 ◽

Cited By ~ 7

Author(s):

R. Salimi ◽

A. A. Sabbagh Alvani ◽

N. Naseri ◽

S. F. Du ◽

D. Poelman

Keyword(s):

Methylene Blue ◽

Photocatalytic Activity ◽

Visible Light ◽

Visible Light Irradiation ◽

Photocatalytic Performance ◽

Sol Gel ◽

Light Irradiation ◽

Photo Degradation ◽

Gel Method ◽

Sol Gel Method

A new plasmonic Ag hybridized CuWO4/WO3 heterostructured nanocomposite was successfully synthesized via a ligand-assisted sol gel method and the photocatalytic activity was evaluated by photo-degradation of methylene blue (MB) under visible light irradiation.

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The photocatalytic activity and degradation mechanism of methylene blue over copper(ii) tetra(4-carboxyphenyl) porphyrin sensitized TiO2under visible light irradiation

RSC Advances ◽

10.1039/c4ra03979c ◽

2014 ◽

Vol 4 (55) ◽

pp. 28978-28986 ◽

Cited By ~ 13

Author(s):

Huigang Wang ◽

Dongmei Zhou ◽

Shaosong Shen ◽

Junmin Wan ◽

Xuming Zheng ◽

...

Keyword(s):

Methylene Blue ◽

Photocatalytic Activity ◽

Visible Light ◽

Visible Light Irradiation ◽

Catalytic Mechanism ◽

Degradation Mechanism ◽

Light Irradiation ◽

Electronic Relaxation ◽

Relaxation Dynamics

Copper(ii)tetra(4-carboxyphenyl) porphyrin were chemically sensitized on TiO2, its electronic relaxation dynamics and the visible-light induced catalytic mechanism are discussed.

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