Theoretical and Experimental Approach to the Production of ZnO Nanoparticles by Controlled Precipitation Method in Methanol

2022 ◽  
Vol 7 (2) ◽  
Author(s):  
Oscar J. Suarez ◽  
Helia B. León‐Molina
Keyword(s):  
Zno Nanoparticles ◽  
Experimental Approach ◽  
Precipitation Method ◽  
Controlled Precipitation

Solubility Enhancement of Fe in ZnO Nanoparticles Prepared by Co-Precipitation Method

2021 ◽  
Author(s):  
Muhammad Musharaf ◽  
Shumaila Karamat ◽  
Muhammad Umair Hassan ◽  
Uzma Khalique ◽  
Ahmet Oral ◽  
...  
Keyword(s):  
Zno Nanoparticles ◽  
Solubility Enhancement ◽  
Precipitation Method ◽  
Co Precipitation

Photocatalytic Degradation of Synthetic Sulfur Pollutants in Petroleum Fractions under Different pH and Photocatalyst

2021 ◽  
Vol 02 (01) ◽  
Author(s):  
Mohamad Alif Hakimi Hamdan ◽  
◽  
Nur Hanis Hayati Hairom ◽  
Nurhafisza Zaiton ◽  
Zawati Harun ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Zno Nanoparticles ◽  
Low Cost ◽  
Industrial Effluents ◽  
Degradation Process ◽  
Vital Role ◽  
Petroleum Fraction ◽  
Precipitation Method ◽  
Synthesis Process ◽  
Petroleum Fractions

Thiophene is one of the sulfur compounds in the petroleum fraction that can be harmful to living things and lead to a critical effect on the ecosystem. Photocatalytic degradation is one of the promising methods in treating wastewater as it can mineralization of pollutants into carbon dioxide and water. Other than that, this method is non-toxic and relatively low cost. The production of hydroxyl radicals playing a vital role in the degradation of organic pollutants. It has been claimed that the usage of zinc oxide (ZnO) nanoparticles could give an excellent degradation process as this photocatalyst have high photosensitivity, low cost and chemically stable. However, the preparation method of ZnO nanoparticles will affect the agglomeration, particle size, shape and morphology of particles and lead to influence the photocatalytic activity in degrading thiophene. Therefore, this study focused on the effectiveness of ZnO nanoparticles in the presence of fibrous nanosilica (KCC-1) and polyethylene glycol (PEG) as the capping agent to degrade synthetic thiophene. ZnO/KCC-1 had been synthesized via the precipitation method and characterized by using Fourier Transform Infrared (FTIR). The chemical bond and nature of the photocatalyst from the FTIR results proved that the synthesis process to produce the ZnO/KCC-1 was succeed. The large surface area of KCC-1 increases the effectiveness of ZnO which is supported by the experimental data. Accordingly, the optimum condition for photocatalytic degradation of thiophene is under pH 7 by using ZnO/KCC-1 as photocatalyst. Hence, it is believed that this research could be implemented to remove the thiophene in petroleum fraction from the actual industrial effluents and this can preserve nature in the future.

scholarly journals Multi-band visible photoresponse study of Co2+ doped ZnO nanoparticles

RSC Advances ◽  
2017 ◽  
Vol 7 (63) ◽  
pp. 39657-39665 ◽  
Author(s):  
Anju Anna Jacob ◽  
L. Balakrishnan ◽  
K. Shambavi ◽  
Z. C. Alex
Keyword(s):  
Zno Nanoparticles ◽  
Precipitation Method ◽  
Cobalt Doping ◽  
Characteristic Analysis ◽  
Visible Absorption ◽  
Doped Zno ◽  
Co Precipitation ◽  
Multi Band

Cobalt doping enhances visible absorption in ZnO nanoparticles as a result of d–d transitions. By co-precipitation method, Zn1−xCoxO nanoparticles had been synthesised and multiband photodetectors were fabricated after characteristic analysis.

Effect of Mn Dopant on Lattice Parameters and Band Gap Energy of Semiconductor ZnO Nanoparticles

2013 ◽  
Vol 829 ◽  
pp. 784-789 ◽  
Author(s):  
Mahmoud Zolfaghari ◽  
Mahshid Chireh
Keyword(s):  
Band Gap ◽  
Zno Nanoparticles ◽  
Room Temperature ◽  
Lattice Parameters ◽  
Memory Storage ◽  
Precipitation Method ◽  
High Electron ◽  
Gap Energy ◽  
Wide Range ◽  
Ft Ir

ZnO belongs to the II-VI semiconductor group with a direct band-gap of 3.2-3.37 eV in 300K and a high exciton binding energy of 60 meV. It has good transparency, high electron mobility, wide, and strong room-temperature luminescence. These properties have many applications in a wide area of emerging applications. Doping ZnO with the transition metals gives it magnetic property at room temperature hence making it multifunctional material, i.e. coexistence of magnetic, semiconducting and optical properties. The samples can be synthesized in the bulk, thin film, and nanoforms which show a wide range of ferromagnetism properties. Ferromagnetic semiconductors are important materials for spintronic and nonvolatile memory storage applications. Doping of transition metal elements into ZnO offers a feasible means of tailoring the band gap to use it as light emitters and UV detector. As there are controversial on the energy gap value due to change of lattice parameters we have synthesized Mn-doped ZnO nanoparticles by co-precipitation method with different concentrations to study the effect of lattice parameters changes on gap energy. The doped samples were studied by XRD, SEM, FT-IR., and UV-Vis. The XRD patterns confirm doping of Mn into ZnO structure. As Mn concentrations increases the peak due to of Mn impurity in FT-IR spectra becomes more pronounces hence confirming concentrations variation. We find from UV-Vis spectra that the gap energy due to doping concentration increases due to the Goldschmidt-Pauling rule this increase depends on dopant concentrations and increases as impurity amount increases.

Temperature induced phase transition in fluorescence active zein nanoparticles

2021 ◽  
Vol 99 (1) ◽  
pp. 18-23
Author(s):  
Charlie Joe Croxford ◽  
Rajpreet Kaur ◽  
Kultar Singh ◽  
Mandeep Singh Bakshi
Keyword(s):  
Phase Transition ◽  
Temperature Variation ◽  
Room Temperature ◽  
Colloidal Stability ◽  
Precipitation Method ◽  
Effect Of Temperature ◽  
Influence Of Temperature ◽  
Influence Of Temperature On ◽  
Potential Use ◽  
Controlled Precipitation

Stable colloidal zein nanoparticles (NPs) were synthesized by using controlled precipitation method. They were made fluorescence active by incorporating a small amount of fluorescence quinolinium surfactant. The incorporation of fluorescence surfactant provided both the colloidal stability and the fluorescence ability to determine the phase transition in zein NPs under the effect of temperature variation. Maintaining colloidal stability under the effect of temperature variation is an essential aspect of zein NPs applicability as a source of vegetarian protein supplement in different food suspensions. Different techniques such as fluorescence, DLS size, zeta potential, and FTIR measurements were applied to determine the influence of temperature on the colloidal stability of zein NPs. Zein NPs undergo phase transition well above room temperature while maintaining their size in nanometer range, and the phase transition temperature decreased with the amount of zein used in the synthesis of zein NPs. The results highlighted the potential use of zein NPs as a vegetarian supplement protein in different food products.

Controlled precipitation methods: formation mechanism of ZnO nanoparticles

2001 ◽  
Vol 21 (7) ◽  
pp. 925-930 ◽  
Author(s):  
J.E Rodrı́guez-Paéz ◽  
A.C Caballero ◽  
M Villegas ◽  
C Moure ◽  
P Durán ◽  
...  
Keyword(s):  
Formation Mechanism ◽  
Zno Nanoparticles ◽  
Controlled Precipitation
Sign in / Sign up

Export Citation Format

Share Document