scholarly journals Zinc Oxide Nanoparticles for Removal of Arsenic from Water

2019 ◽  
Vol 8 (3S) ◽  
pp. 117-122
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Linear Trend ◽  
Zinc Acetate Dihydrate ◽  
Sol Gel ◽  
Total Surface Area ◽  
Nanoparticle Size ◽  
Oxide Nanoparticles ◽  
Calcination Temperatures ◽  
Average Size

Removal of arsenate, As(V) from water was achieved using zinc oxide nanoparticles. The nanoparticles were synthesised from zinc acetate dihydrate and sodium hydroxide (NaOH) using the wet chemical sol-gel method. Different synthesis parameters were explored; including different ratios of Zn:NaOH and calcination temperatures. The synthesised samples were subsequently characterised and tested to investigate the adsorption capabilities of ZnO towards As(V). The colourimetric approach was utilised to analyse the samples’ performance. The particles had a relatively large average size as tested by the nanoparticle size analyser and the X-Ray Diffraction (XRD) characterisation of the samples confirmed the formation of ZnO. The peaks were narrow with high intensity, which indicates a larger crystal size and stable crystallinity. The samples showed a linear trend of increased adsorption capacity with the contact time. However, as indicated by the XRD and nanoparticle size analyser results, the particles had agglomerated and this has caused the total surface area to shrink. In summary, ZnO nanoparticles were successfully synthesised and were successful in adsorbing As(V) with different percentages for each sample. The adsorption trend was clear with respect to the changing parameters.

scholarly journals THE USE OF NANOSCALE ZINC OXIDE IN WOOD-BASED COMPOSITIONS

2021 ◽  
Author(s):  
S. Neminushchaya ◽  
E. Tomina ◽  
A. Dmitrenkov
Keyword(s):  
Zinc Oxide ◽  
Vegetable Oil ◽  
Zinc Oxide Nanoparticles ◽  
Sol Gel ◽  
Environmental Safety ◽  
Oxide Nanoparticles ◽  
Natural Wood ◽  
Oxide Particles ◽  
Used Vegetable Oil ◽  
20 Nm

The aim of this work was to study compositions based on vegetable oil waste and nanoscale zinc oxide particles for processing natural wood. The sol-gel method was used for the synthesis of zinc oxide nanoparticles. The synthesized zinc oxide nanoparticles did not contain impurities and had a shape close to spherical, and their size did not exceed 20 nm. We used freshly prepared suspensions of zinc oxide nanoparticles in used vegetable oil with their content in the amount of 0.1, 0.5 and 1.0 wt. parts per 100 parts of oil. The wood was treated by hot-cold impregnation. The tests were carried out on samples of birch and pine wood of standard sizes. In the modified samples, the wetting angle, moisture and water absorption, as well as their swelling were determined. It is shown that the use of zinc oxide nanoparticles in compositions based on vegetable oil waste can significantly reduce the moisture and water resistance of wood and reduce its swelling. The optimal dosages of the nanopowder introduced into the used vegetable oil and the conditions of impregnation were selected. The compositions used on the basis of vegetable oil waste are characterized by environmental safety, and the resulting wood samples had an improved appearance.

Crystalline quality assessment, photocurrent response and optical properties of reduced graphene oxide uniformly decorated zinc oxide nanoparticles based on the graphene oxide concentration

RSC Advances ◽  
2015 ◽  
Vol 5 (65) ◽  
pp. 53117-53128 ◽  
Author(s):  
Majid Azarang ◽  
Ahmad Shuhaimi ◽  
M. Sookhakian
Keyword(s):  
Zinc Oxide ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Sol Gel ◽  
Degree Of Crystallinity ◽  
Oxide Nanoparticles ◽  
One Pot ◽  
Natural Surfactant ◽  
Reduced Graphene

Zinc oxide nanoparticles–reduced graphene oxide composites with a high degree of crystallinity and high dispersity were successfully synthesized via a facile sol–gel one-pot method in a starch environment as a natural surfactant for the fabrication of solar cell devices.

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.

Biosynthesis of Zinc Oxide Nanoparticles Using Pongamia pinnata Plant Leaves Extract

2019 ◽  
pp. 43-46
Author(s):  
Sneha Sawade ◽  
Pramod Kulkarni
Keyword(s):  
Zinc Oxide ◽  
Aqueous Extract ◽  
Zinc Oxide Nanoparticles ◽  
Pongamia Pinnata ◽  
Oxide Nanoparticles ◽  
Capping Agent ◽  
Plant Leaves ◽  
X Ray Diffraction ◽  
X Ray ◽  
Average Size

We reported a simple, green and eco-friendly approach for the synthesis of zinc oxide nanoparticles using aqueous extract of Pongamia pinnata plant leaves acts as reducing agent as well as capping agent. Biosynthesized zinc oxide nanoparticles were characterized by FTIR, X-ray diffraction and field emission scanning electron microscopy. The results suggested that the zinc oxide nanoparticles synthesized by aqueous extract of Pongamia pinnata plant leaves with high purity, mostly spherical in shape with an average size of 23.5 nm.

XPS and UV–vis studies of Ga-doped zinc oxide nanoparticles synthesized by gelatin based sol-gel approach

2016 ◽  
Vol 42 (12) ◽  
pp. 13605-13611 ◽  
Author(s):  
Ali Khorsand Zak ◽  
Nur Suhaili Abd Aziz ◽  
Abdul Manaf Hashim ◽  
Frouzan Kordi
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Sol Gel ◽  
Oxide Nanoparticles

scholarly journals Maternal Dietary Exposure of Zinc Oxide Nanoparticles (ZnONPs) and its Effect in Guppies (Poecilia reticulata)

2019 ◽  
Vol 9 (1S4) ◽  
pp. 779-782
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Poecilia Reticulata ◽  
Dietary Exposure ◽  
Developed Countries ◽  
Oxide Nanoparticles ◽  
Ionic Form ◽  
Toxicological Effect ◽  
Toxicological Effects ◽  
Average Size

Zinc deficiency is one of the major malnutritional problems worldwide specifically in developing and developed countries. The zinc uptake takes place in human body in ionic form and metabolized naturally and converted into nano form. In the present study zinc oxide nanoparticles (ZnONPs) were synthesized by starch. The synthesized different ZnONPs were characterized by Fourier Transform Infra-Red spectroscopy (FTIR) and Scanning Electron Microscopy (SEM) coupled with Energy Dispersive X ray analysis (EDX). FTIR analysis revealed Zinc peak at 405.05 cmˉ1 .The average size of the synthesized ZnONPs was in the range from 200-300 nm with flower like shape. Furthermore, toxicity and level of nanoparticle accumulation were evaluated in young and adult guppies (Poecilia reticulata) using different concentration of ZnONPs. To explore the toxicological effect, the different concentration of nanoparticles administered in young and adult guppies. There was a dose dependent toxicological effects were noted in the guppies.

scholarly journals Sol-gel zinc oxide nanoparticles: advances in synthesis and applications

2021 ◽  
Vol 1 (4) ◽  
Author(s):  
Parisa Shafiee ◽  
Mehdi Reisi Nafchi ◽  
Sara Eskandarinezhad ◽  
Shirin Mahmoudi ◽  
Elahe Ahmadi
Keyword(s):  
Zinc Oxide ◽  
Zno Nanoparticles ◽  
Zinc Oxide Nanoparticles ◽  
Sol Gel ◽  
Pharmaceutical Products ◽  
Precipitation Method ◽  
Oxide Nanoparticles ◽  
Gel Method ◽  
Sol Gel Method ◽  
Gel Technique

Zinc oxide nanoparticles (ZnO) exhibit numerous characteristics such as biocompatibility, UV protection, antibacterial activity, high thermal conductivity, binding energy, and high refractive index that make them ideal candidates to be applied in a variety of products like solar cells, rubber, cosmetics, as well as medical and pharmaceutical products. Different strategies for ZnO nanoparticles’ preparation have been applied: sol-gel method, co-precipitation method, etc. The sol-gel method is an economic and efficient chemical technique for nanoparticle (NPs) generation that has the ability to adjust the structural and optical features of the NPs. Nanostructures are generated from an aqueous solution including metallic precursors, chemicals for modifying pH using either a gel or a sol as a yield. Among the various approaches, the sol-gel technique was revealed to be one of the desirable techniques for the synthesis of ZnO nanoparticles. In this review, we explain some novel investigations about the synthesis of zinc oxide nanoparticles via sol-gel technique and applications of sol-gel zinc oxide nanoparticles. Furthermore, we study recent sol-gel ZnO nanoparticles, their significant characteristics, and their applications in biomedical applications, antimicrobial packaging, drug delivery, semiconductors, biosensors, catalysts, photoelectron devices, and textiles.

Influence of Li co-doping on structural property of sol-gel derived terbium doped zinc oxide nanoparticles

2018 ◽  
Vol 142 ◽  
pp. 593-601 ◽  
Author(s):  
Pawan Kumar ◽  
A.K. Yadav ◽  
Amish G. Joshi ◽  
D. Bhattacharyya ◽  
S.N. Jha ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Structural Property ◽  
Zinc Oxide Nanoparticles ◽  
Sol Gel ◽  
Oxide Nanoparticles ◽  
Co Doping
Sign in / Sign up

Export Citation Format

Share Document