scholarly journals Hazardous o-toluidine mineralization by photocatalytic bismuth doped ZnO slurries

2015 ◽  
Vol 51 (52) ◽  
pp. 10459-10462 ◽  
Author(s):  
G. Cappelletti ◽  
V. Pifferi ◽  
S. Mostoni ◽  
L. Falciola ◽  
C. Di Bari ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Aqueous Media ◽  
Solar Irradiation ◽  
Oxide Nanoparticles ◽  
Doped Zno

Photocatalytic mineralization of o-toluidine in aqueous media under UV/solar irradiation was achieved by bare and bismuth doped zinc oxide nanoparticles.

scholarly journals Phytosynthetic Ag doped ZnO nanoparticles: Semiconducting green remediators

2018 ◽  
Vol 16 (1) ◽  
pp. 556-570 ◽  
Author(s):  
Khuram Shahzad Ahmad ◽  
Shaan Bibi Jaffri
Keyword(s):  
Zinc Oxide ◽  
Zno Nanoparticles ◽  
Zinc Oxide Nanoparticles ◽  
Organic Dyes ◽  
Zinc Acetate Dihydrate ◽  
Polluted Water ◽  
Oxide Nanoparticles ◽  
Pseudo First Order Reaction ◽  
One Pot ◽  
Doped Zno

AbstractHighly stable semiconducting silver doped zinc oxide nanoparticles have been synthesized via facile, biomimetic and sustainable route, through utilization of Zinc acetate dihydrate (C4H6O4Zn · 2H2O) as host, Silver nitrate (AgNO3) as dopant and phytochemicals of angiospermic medicinal plant Prunus cerasifera as the reducing agents. Synthesis of Ag doped ZnO nanoparticles was done in a one pot synthetic mode by varying the amount of dopant from 0.2 – 2.0%. Synthesized photocatalyst nanoparticles were analyzed via UV-vis, FTIR, XRD and SEM. Commendable alleviation in the direct band gap i.e. 2.81 eV was achieved as a result of doping. Silver doped zinc oxide nanoparticles size ranged between 72.11 – 100 nm with rough surface morphology and higher polydispersity degree. The XRD patterns revealed the hexagonal wurtzite geometry of crystals with an average crystallite size of 2.99 nm. Persistent organic dyes Methyl Orange, Safranin O and Rhodamine B were sustainably photodegraded in direct solar irradiance with remarkable degradation percentages up to 81.76, 74.11 and 85.52% in limited time with pseudo first order reaction kinetics (R2 =0.99, 0.99 and 0.97). Furthermore, efficient inhibition against nine microbes of biomedical and agriculturally significance was achieved. Synthesized nanoparticles are potential green remediators of polluted water and perilous pathogens.

Lifetime and dissolution kinetics of zinc oxide nanoparticles in aqueous media

2016 ◽  
Vol 27 (32) ◽  
pp. 324001 ◽  
Author(s):  
Ning Wang ◽  
Tiezheng Tong ◽  
Minwei Xie ◽  
Jean-François Gaillard
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Aqueous Media ◽  
Dissolution Kinetics ◽  
Oxide Nanoparticles ◽  
Kinetics Of

scholarly journals Synthesis of N-doped ZnO nanoparticles with cabbage morphology as a catalyst for the efficient photocatalytic degradation of methylene blue under UV and visible light

RSC Advances ◽  
2019 ◽  
Vol 9 (13) ◽  
pp. 7509-7535 ◽  
Author(s):  
Eswaran Prabakaran ◽  
Kriveshini Pillay
Keyword(s):  
Methylene Blue ◽  
Zinc Oxide ◽  
Zno Nanoparticles ◽  
Zinc Oxide Nanoparticles ◽  
Zinc Acetate Dihydrate ◽  
Oxide Nanoparticles ◽  
Acetate Dihydrate ◽  
Hydrazine Monohydrate ◽  
Nitrogen Doped ◽  
Doped Zno

In this study, the synthesis of nitrogen-doped zinc oxide nanoparticles with a cabbage like morphology (N-ZnONCBs) by a hydrothermal method using zinc acetate dihydrate as a precursor and hydrazine monohydrate as a nitrogen source is reported.

Synthesis and Characterization of Onion Mediated Silver Doped Zinc Oxide Nanoparticles

2018 ◽  
pp. 111-120 ◽  
Author(s):  
N. Tensingh Baliah ◽  
Muthulakshmi P. ◽  
S. Lega Priyatharsini
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Good Alternative ◽  
Oxide Nanoparticles ◽  
Zno Nps ◽  
X Ray ◽  
Synthesis Of Nanoparticles ◽  
Onion Extract ◽  
Operation Conditions ◽  
Doped Zno

Green synthesis of nanoparticles has attracted considerable attention in recent years. In this regard, plants extracts and natural resources such as microorganisms and enzymes have been found to be good alternative reagents in nanoparticles synthesis. Utilizing green substances has several advantages including low energy consumption and moderate operation conditions without using any toxic chemicals. An attempt was made to synthesis and characterizes the silver doped zinc oxide nanoparticles (Ag doped ZnO NPs) by using onion extract. The synthesized Ag doped ZnO NPs were characterized by Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Spectroscopy Analysis (EDAX), Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD) and Zeta potential analyses. These characterizations revealed that doped nanoparticles are differed in their structural properties. The onion extract was used as reducing agent as well as stabilizer. The phytochemicals found in the onion extract were responsible for the formation of Ag doped ZnO NPs.

Synthesis of samarium-doped zinc oxide nanoparticles with improved photocatalytic performance and recyclability under visible light irradiation

2018 ◽  
Vol 42 (3) ◽  
pp. 2295-2305 ◽  
Author(s):  
Mohd Faraz ◽  
Faria K. Naqvi ◽  
Mohammad Shakir ◽  
Neeraj Khare
Keyword(s):  
Zinc Oxide ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Zno Nanoparticles ◽  
Zinc Oxide Nanoparticles ◽  
Photocatalytic Performance ◽  
Oxide Nanoparticles ◽  
Gel Combustion ◽  
Combustion Route ◽  
Doped Zno

Samarium-doped ZnO nanoparticles (1%, 3%, and 5%) were synthesized by a gel-combustion route and their application as an efficient photocatalyst for the degradation of Malachite green (MG) dye is demonstrated.

scholarly journals EFFECT OF CE3+ METAL IONS ON THE ANTIBACTERIAL AND ANTICANCER ACTIVITY OF ZINC OXIDE NANOPARTICLES PREPARED BY COPRECIPITATION METHOD

2017 ◽  
Vol 10 (3) ◽  
pp. 388 ◽  
Author(s):  
Theivarasu C ◽  
Indumathi Thangavelu
Keyword(s):  
Zinc Oxide ◽  
Anticancer Activity ◽  
Zinc Oxide Nanoparticles ◽  
Human Lung ◽  
Human Lung Cancer ◽  
Oxide Nanoparticles ◽  
Lung Cancer Cell ◽  
Zno Nps ◽  
Doped Zno ◽  
Antibacterial And Anticancer Activity

ABSTRACTObjective: This study was undertaken to know about the antibacterial and anticancer activity of synthesized zinc oxide (ZnO) nanoparticles (NPs).Methods: The ZnO NPs and different concentration of Ce3+ (0.05M, 0.10M, and 0.15M)-doped ZnO NPs were synthesized by coprecipitation method.The synthesized nanoparticles were analyzed by X-ray diffraction (XRD) and HRSEM. The antibacterial studies were performed against a set ofbacterial strains as Gram-positive bacteria (Streptococcus aureus and Streptococcus pneumonia) and Gram-negative (Escherichia coli, Pseudomonasaeruginosa, Proteus vulgaris, Klebsiella pneumonia, and Shigella dysenteriae) bacteria. The cytotoxic effect of ZnO and Ce-doped ZnO was analyzed incultured (A549) human lung cancer cell line.Result: The XRD studies showed the wurtzite structure of nanoparticles. HRSEM analysis showed the spherical shape of ZnO and Ce-doped ZnO. TheZn0.85Ce0.15O NPs possessed more antibacterial effect as compared to the other ZnO and Ce-doped ZnO NPs. The Zn0.90Ce0.10O NPs created the highestcytotoxicity activity. With respect to cell death, as low a concentration of 68±0.05 μg/ml of Zn0.90Ce0.10O NPs was good enough to cause loss of viabilityof 50% of the cell as compared to ZnO and Zn1-xCexO (x=0.05 and 0.15) NPs.Conclusion: Results from this work concluded that Zn0.85Ce0.15O and Zn0.90Ce0.10O NPs possess antibacterial and anticancer activity, respectively.Keywords: Zinc oxide nanoparticles, Coprecipitation method, Antibacterial activity and anticancer activity, Human lung cancer cell line.

scholarly journals Biosynthesis Microwave-Assisted of Zinc Oxide Nanoparticles with ZiziphusJujuba Leaves Extract: Characterization and Photocatalytic Application

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1682
Author(s):  
Maymounah N. Alharthi ◽  
Iqbal Ismail ◽  
Stefano Bellucci ◽  
Nezar H. Khdary ◽  
Mohamed Abdel Salam
Keyword(s):  
Zinc Oxide ◽  
Photocatalytic Degradation ◽  
Zinc Oxide Nanoparticles ◽  
Average Particle Size ◽  
Solar Irradiation ◽  
Oxide Nanoparticles ◽  
Average Particle ◽  
Zno Nps ◽  
Microwave Assisted ◽  
Photocatalytic Application

The present work is intended to biosynthesize zinc oxide nanoparticles (ZnO NPs) via facile and modern route using aqueous Ziziphus jujuba leaves extract assisted by microwave and explore their photocatalytic degradation of methyl orange anionic dye and methylene blue cationic dye under solar irradiation. The biosynthesized microwave assisted ZnO NPs were characterized and the results showed that ZnO NPs contain hexagonal wurtzite and characterized with a well-defined spherical-like shape with an outstanding band gap (2.70 eV), average particle size of 25 nm and specific surface area of 11.4 m2/g. The photocatalytic degradation of the MO and MB dyes by biosynthesized ZnO NPs under solar irradiation was studied and the results revealed the selective nature of the ZnO NPs for the adsorption and further photocatalytic degradation of the MO dye compared to the MB dye. In addition, the photocatalytic degradation of MO and MB dyes by the ZnO NPs under solar radiation was fitted by the first-order kinetics. Moreover, the photodegradation mechanism proposed that superoxide ions and hydroxyl radicals are the main reactive species.

scholarly journals Stabilization of ZnO Nanoparticles Using Water Extract of Waste Coconut Husk and Photocatalytic Activity

2021 ◽  
Author(s):  
Sanjib Baglari ◽  
Dulu Brahma ◽  
Ujjal K Gautam ◽  
Pranjal Kalita ◽  
Manasi Buzar Baruah
Keyword(s):  
Zinc Oxide ◽  
Photocatalytic Activity ◽  
Zinc Oxide Nanoparticles ◽  
Low Cost ◽  
Water Extract ◽  
Photon Absorption ◽  
Alkaline Media ◽  
Solar Irradiation ◽  
Oxide Nanoparticles ◽  
Coconut Husk

Abstract Here, we report the synthesis of highly photoactive zinc oxide nanoparticles using water extract of waste coconut husk ash as a precipitating agent in a green approach which is a potential source of natural alkaline media. The formation of zinc oxide nanoparticles at different pH of the solution of coconut husk ash was confirmed through powder XRD, SEM-EDX, UV-Vis, FTIR and photoluminescence spectroscopy. The photocatalytic performance of the samples was evaluated through the degradation of methylene blue (MB)and methyl orange (MO) under solar irradiation which undergoes degradation around 98% and 56% within 120 min, respectively. The high photocatalytic activity and rate constant could be attributed to the large surface area due to small particle size that could provide quicker photon absorption and reduction of charge carrier recombination. This current work introduces a new method to reduce energy consumption for the synthesis of highly photoactive low-cost zinc oxide nanoparticles.

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