scholarly journals Synthesis and characterization of CdS/UiO-66/Ag3PO4 nanocomposite for photocatalytic degradation of methyl orange under visible light irradiation

2021 ◽  
Vol 34 (3) ◽  
pp. 571-588
Author(s):  
T. Kebede ◽  
A. M. Taddesse ◽  
B. Ergedo
Keyword(s):  
Methyl Orange ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Visible Light Irradiation ◽  
Dye Degradation ◽  
Organic Pollutant ◽  
Light Irradiation ◽  
Sample Solution ◽  
Sewage Sample ◽  
Operational Parameters

Single, binary and ternary nanomaterials were synthesized by precipitation, solvothermal, simple solution and impregnation methods to serve as photocatalysts. The crystal structure, morphology, band gap energy, functional groups and optical properties of these materials were characterized by XRD, SEM-EDX, UV-Vis, FTIR, and PL instrumental techniques, respectively. Photocatalaytic degradation performances of all the as-synthesized photocatalysts were investigated under visible light irradiation using MO as a model organic pollutant. The photocatalytic degradation performances of all the photocatalysts were evaluated on aqueous solution of the model pollutant dye as well as on a real sewage sample solution collected from Bahir Dar Textile Share Company. Results suggested that the optimized ternary nanocomposite photocatalyst exhibited a relatively higher efficiency towards the photodegradation of both the methyl orange (MO) dye solution (90%) and the real sewage sample solution (71.2%). The effect of operational parameters such as pH (4), initial dye concentration (10 mg/L) and photocatalyst load (0.2 g/L) in MO dye degradation were investigated by using the ternary CdS/UiO-66/Ag3PO4 (R4) nanocomposite.                     KEY WORDS: Metal-organic frameworks, Nanocomposite, Ternary system, Photocatalysts, Methyl orange   Bull. Chem. Soc. Ethiop. 2020, 34(3), 571-588. DOI: https://dx.doi.org/10.4314/bcse.v34i3.12

scholarly journals Synergetic effect of CuS@ZnS nanostructures on photocatalytic degradation of organic pollutant under visible light irradiation

RSC Advances ◽  
2017 ◽  
Vol 7 (55) ◽  
pp. 34366-34375 ◽  
Author(s):  
S. Harish ◽  
J. Archana ◽  
M. Navaneethan ◽  
S. Ponnusamy ◽  
Ajay Singh ◽  
...  
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Hydrothermal Method ◽  
Visible Light Irradiation ◽  
Organic Pollutant ◽  
Synergetic Effect ◽  
Light Irradiation ◽  
Visible Light Active

Ultrafast visible light active CuS/ZnS nanostructured photocatalysts were synthesized by a hydrothermal method.

scholarly journals A Facile Synthesis of Copper Oxide Nanorods for Photocatalytic Degradation of Organic Pollutant and Inactivation of Pathogens

2018 ◽  
Vol 4 (5) ◽  
pp. 467-470 ◽  
Author(s):  
Sathish Mohan Botsa ◽  
Dharmasoth Ramadevi ◽  
K. Basavaiah
Keyword(s):  
Visible Light ◽  
Copper Oxide ◽  
Green Synthesis ◽  
Photocatalytic Degradation ◽  
Visible Light Irradiation ◽  
Organic Pollutant ◽  
Visible Region ◽  
Solar Spectrum ◽  
Light Irradiation ◽  
Cuo Nanorods

In the recent years, green synthesis of nanomaterials has received a great attention to researchers in worldwide due to eco-friendly and scalable synthesis. Here, we report a green synthesis of copper oxide (CuO) nanorods via sonochemical assisted approach. The crystalline structure, band gap and morphology of as prepared CuO nanorods were investigated by UV-Vis diffuse reflectance (UV-Vis/DRS), Fourier Transform infrared spectroscopy, powder X-Ray diffraction (XRD) pattern and scanning electron microscopy (FESEM-EDX). The bandgap of as prepared CuO nanorods was found to be 2.0 eV, which is fall in the visible region of solar spectrum. FTIR demonstrated that there is strong interaction between Cu and oxygen in prepared CuO. XRD results reveal the formation of phase pure and crystalline CuO. FESEM images clearly show the rod like morphology of CuO and the presence of elemental copper and oxygen in EDX, confirms the formation of CuO. The photocatalytic degradation activity of CuO nanorods was examined against a model dye pollutant, nitrobenzene (NB) under visible light irradiation. CuO nanorods were effectively degraded the NB under visible light irradiation. CuO nanorods acts as potent and shows enhanced antimicrobial agent against pathogenic fungi, Candida albicans and bacteria, Escherichia coli.

scholarly journals Photocatalytic Degradation of Methyl Orange by CeO2 and Fe–doped CeO2 Films under Visible Light Irradiation

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
D. Channei ◽  
B. Inceesungvorn ◽  
N. Wetchakun ◽  
S. Ukritnukun ◽  
A. Nattestad ◽  
...  
Keyword(s):  
Methyl Orange ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Ceo2 Films ◽  
Doped Ceo2 ◽  
Degradation Of Methyl Orange

The Effect of Reactive Red 4 Dye as a Sensitizer in Enhancing Photocatalytic Activity of TiO2 for Degradation of Methyl Orange

2016 ◽  
Vol 835 ◽  
pp. 366-371 ◽  
Author(s):  
F. Bakar ◽  
M.S. Azami ◽  
S.K. Ain ◽  
R. Zaharudin ◽  
Wan Izhan Nawawi
Keyword(s):  
Methyl Orange ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Visible Light Irradiation ◽  
Glass Plate ◽  
Order Rate Constant ◽  
Light Irradiation ◽  
Fluorescent Lamp ◽  
System A ◽  
Immobilized Tio2

In this work, anionic RR4 dye was used to sensitize TiO2/PVA and TiO2/PEG immobilized system in enhancing photocatalytic degradation of anionic methyl orange (MO) dye. 0.3g of TiO2 and polymer binder was coated onto a clean glass plate by using brush technique to develop optimum immobilize TiO2 system. A comparison study between immobilized TiO2/PVA (Im/TiO2/PVA) and immobilized TiO2/PEG (Im/TiO2/PEG) system with and without RR4 sensitizer were carried out under 55-W fluorescent lamp and visible light irradiation. The photocatalytic degradation of MO was significantly enhanced for both RR4 dye sensitized Im/TiO2/PVA and Im/TiO2/PEG with first order rate constant was ca. 0.080 min-1 and 0.071 min-1 respectively under 55-W fluorescent lamp. Same observation as well under visible light irradiation whereby enhanced of those RR4 sensitized immobilized photocatalysts were recorded as compared with immobilized photocatalysts without RR4 as sensitizer. The photocatalytic enhancement under Im/TiO2/PVA/RR4 and Im/TiO2/PEG/RR4 are due to the ability of RR4 dye to become electron (e-) donor for conduction band (CB) of TiO2, thus making TiO2 CB riches with electron, eventually this e is used to remove MO dye by producing hydroxyl radical.

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