scholarly journals Synthesis of Ag-Fe3O4 nanoparticles for degradation of methylene blue in aqueous medium

2020 ◽  
Vol 34 (1) ◽  
pp. 123-134
Author(s):  
Muhammad Saeed ◽  
Muhammad Usman ◽  
Majid Muneer ◽  
Nadia Akram ◽  
Atta ul Haq ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Catalytic Activity ◽  
Ag Nanoparticles ◽  
Active Catalyst ◽  
Precipitation Method ◽  
Contaminated Water ◽  
Synthetic Method ◽  
Photo Degradation ◽  
Photo Catalytic Activity

Fe3O4 known as magnetite is one of the oxides of iron which plays a major role in various fields of sciences. Fe3O4 was synthesized by precipitation method using NH3.H2O, FeCl2.4H2O and FeCl3.6H2O as precursor materials. For synthesis of 5% Ag-Fe3O4, the green synthetic method was used for immobilization of Ag nanoparticles on Fe3O4 using leaves extract of Calotropis gigantea plant. The synthesized Fe3O4 and 5% Ag-Fe3O4 were employed as catalyst in degradation of methylene blue. The photo catalytic activity of Fe3O4 was remarkably enhanced by doping of Fe3O4 with Ag nanoparticles. Advanced instrumental techniques including XRD, EDX, TGA and SEM were used for characterization of synthesized particles. The immobilization of Ag on Fe3O4 enhanced the photo degradation of methylene blue from 40 to 72% at 40 °C which confirms that 5% Ag-Fe3O4 is an active catalyst for treatment of dye contaminated water. Ag-Fe3O4 exhibited almost same catalytic activity in two successive cycles.   Bull. Chem. Soc. Ethiop. 2020, 34(1), 123-134.  DOI: https://dx.doi.org/10.4314/bcse.v34i1.11

scholarly journals Synthesis and Characterization of Erbium Trioxide Nanoparticles as Photo-Catalytic for Degradation of Methyl Orange Dye

2019 ◽  
Author(s):  
Rifat Mohammed Dakhil ◽  
Tayser Sumer Gaaz ◽  
Ahmed Al-Amiery ◽  
Mohd S. Takriff ◽  
Abdul Amir H. Kadhum
Keyword(s):  
Catalytic Activity ◽  
Methyl Orange ◽  
Synthesis And Characterization ◽  
Photo Degradation ◽  
Photo Catalytic Activity ◽  
Xrd Diffraction ◽  
Vis Spectroscopy ◽  
Methyl Orange Dye ◽  
Degradation Of Methyl Orange

Abstract. The present work focuses on the photo-catalytic degradation of methyl orange (MO) on Erbium trioxide nanoparticles Er2O3 NPs. In this study, Er2O3 nanoparticles were synthesized and fully characterized via various techniques including; XRD diffraction, UV-Vis spectroscopy and SEM techniques. The results revealed that, the photo-catalytic activity of the prepared Er2O3 NPs towards methyl orange (MB) photo-degradation was manifested. The optimum efficiency obtained was 16 %.

Boron Doped ZnO Nanostructures for Photo Degradation of Methylene Blue, Methyl Orange and Rhodamine B

2021 ◽  
Vol 21 (4) ◽  
pp. 2483-2494
Author(s):  
Aqeel Ahmed Shah ◽  
Ali Dad Chandio ◽  
Asif Ahmed Sheikh
Keyword(s):  
Methylene Blue ◽  
Catalytic Activity ◽  
Methyl Orange ◽  
Rhodamine B ◽  
Recombination Rate ◽  
Charge Recombination ◽  
Photo Degradation ◽  
Photo Catalytic Activity ◽  
Doped Zno ◽  
Nonmetal Doping

The design of sensitive and efficient photo catalyst for the energy and environmental applications with minimum charge recombination rate and excellent photo conversion efficiency is a challenging task. Herein we have developed a nonmetal doping methodology into ZnO crystal using simple solvothermal approach. The boron (B) is induced into ZnO. The doping of B did not make any significant change on the morphology of ZnO nano rods as confirmed by scanning electron microscopy (SEM) without considerable change on periodic arrangement of nanostructures. The existence of B, Zn, and O is shown by energy dispersive spectroscopy (EDS). The X-ray diffraction (XRD) patterns are well matched to the hexagonal phase for both pristine ZnO and B-doped ZnO. The XRD has shown slight dislocation of 2theta degree. The UV-visible spectroscopy was used to measure the optical bandgap and photo catalytic activity for the degradation of organic dyes. The nonmetal doped ZnO has shown potential and outstanding photo catalytic activity for the photo degradation of methylene blue (MB), methyl orange (MO) and rhodamine B in aqueous solution. The photo degradation efficiency of MB, MO and rhodamine B is found to be 96%, 86% and 80% respectively. The enhanced photo catalytic activity of B-doped ZnO is indexed to the inhibited charge recombination rate due to the reduction in the optical bandgap. Based on the obtained results, it can be said that nonmetal doping is excellent provision for the design of active materials for the extended range of applications.

Liquid-Phase Synthesis of NiO-Loaded Ag Nanoparticles and Enhanced Photo-Degradation Performance

2011 ◽  
Vol 287-290 ◽  
pp. 145-149 ◽  
Author(s):  
Zong Min Tian ◽  
Xu Xiang ◽  
Zhi Wei Li ◽  
Feng Li
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Liquid Phase ◽  
Visible Light ◽  
Ag Nanoparticles ◽  
Precipitation Method ◽  
Phase Precipitation ◽  
Photo Degradation ◽  
Nano Structure ◽  
Phase Synthesis

We have synthesized layered Ni(OH)2via a facile liquid-phase precipitation method. NiO with a micro/nano-structure was obtained via calcining Ni(OH)2precursor at 350°C. The as-prepared NiO was utilized as a support to load Ag nanocrystals. SEM and TEM observations showed that Ag nanoparticles were homogeneously distributed onto NiO support and the Ag nanoparticles have sizes of 4-5 nm. The photocatalytic activity of NiO-loaded Ag was investigated by the photodegradation of methylene blue (MB) under the irradiation of visible light. The results suggest that the loading of Ag nanoparticles can enhance the photo-degradation performance of pristine NiO.

Enhanced photo catalytic degradation of methyl orange using p–n Co3O4-TiO2 hetero-junction as catalyst

2020 ◽  
Vol 18 (5-6) ◽  
Author(s):  
Muhammad Saeed ◽  
Muhammad Usman ◽  
Muhammad Ibrahim ◽  
Atta ul Haq ◽  
Iltaf Khan ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Methyl Orange ◽  
Catalytic Performance ◽  
Catalytic Degradation ◽  
Contaminated Water ◽  
Impregnation Method ◽  
Photo Degradation ◽  
Photo Catalytic Activity ◽  
Degradation Data ◽  
Degradation Of Methyl Orange

AbstractPhoto catalytic degradation of pollutants is one of the techniques used for treatment of dye contaminated wastewater. TiO2 has attracted much attention as photo catalyst for treatment of contaminated water. In this study, the photo catalytic performance of TiO2 has been enhanced by formation of p–n Co3O4-TiO2 hetero-junction. The p–n Co3O4-TiO2 hetero-junction was prepared by wet incipient impregnation method and characterized by various techniques. The photo catalytic activity of prepared composite was evaluated by photo degradation of methyl orange. The as prepared Co3O4-TiO2 composite was found as effective catalyst than Co3O4 and TiO2. The higher photo catalytic activity was attributed to p–n junction formed between Co3O4 and TiO2. The degradation data was analyzed according to Eley–Rideal mechanism in terms of 1st and 2nd order kinetics.

Synthesis and characterization of magnetically recyclable Ag nanoparticles immobilized on Fe3O4@C nanospheres with catalytic activity

2015 ◽  
Vol 335 ◽  
pp. 23-28 ◽  
Author(s):  
Wei-hong Li ◽  
Xiu-ping Yue ◽  
Chang-sheng Guo ◽  
Jia-pei Lv ◽  
Si-si Liu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ag Nanoparticles ◽  
Synthesis And Characterization

scholarly journals Synthesis of Micro/nano Urchin-like VO2 Particles and Its Decolorization of Methylene Blue

2019 ◽  
Vol 35 (3) ◽  
Author(s):  
Nguyen The Manh ◽  
Duong Hong Quan ◽  
Vu Thi Ngoc Minh ◽  
Vuong Pham Hung
Keyword(s):  
Methylene Blue ◽  
Sodium Dodecyl ◽  
Adsorption Properties ◽  
Contaminated Water ◽  
Potential Applications ◽  
Synthesis Procedure ◽  
Water Treatments ◽  
Sds Surfactant ◽  
Mb Adsorption

Micro/nano urchin-like VO2 particles were synthesized successfully by hydrothermal method. Vanadium pentoxide (V2O5), oxalic acid (C2H2O4) and sodium dodecyl sulfate (SDS) surfactant were used as reagents for the synthesis of VO2. In this article, we have reported the synthesis procedure of VO2 nanorods and micro/nano urchin-like VO2 structure and evaluating the methylene blue (MB) adsorption properties. Morphology and particle size of VO2 were observed by FE-SEM. The phase formation of VO2 was studied by XRD. Raman spectroscopy was also used for characterization of VO2. Micro/nano urchin-like VO2 structure was showed good MB adsorption properties that have potential applications in dye-contaminated water treatments.

Sign in / Sign up

Export Citation Format

Share Document