Electrical behavior and enhanced photocatalytic activity of (Ag, Ni) co-doped ZnO nanoparticles synthesized from co-precipitation technique

Abstract Methylene blue (MB) dye is the most common harmful, toxic, and non-biodegradable effluent produced by the textile industries. The present study investigates the effect of zinc oxide (ZnO) nanoparticles (NPs) and Ag–Ni doped ZnO NPs on the performance of photocatalytic degradation of MB dye. Pure ZnO and Ag–Ni doped ZnO NPs are synthesized using the co-precipitation method. The crystalline nature and surface morphology of the synthesized pure ZnO and Ag–Ni doped ZnO NPs was characterized by powder X-ray diffraction, scanning electron microscopy (SEM), and high resolution transmission electron microscopy (HRTEM) analysis. The presence of spherical-like morphologies was confirmed from SEM and HRTEM analysis. The presence of Ni–O and Zn–O bands in the synthesized materials was found by Fourier transform infrared (FTIR) spectroscopy analysis. The MB dye was degraded under UV-light exposure in various pH conditions. The Ag (0.02%)–Ni doped ZnO NPs exhibits highest photocatalytic activity of 77% under pH 4.

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Synthesis and growth of spherical ZnO nanoparticles using different amount of plant extract

Journal of Applied Sciences and Environmental Management ◽

10.4314/jasem.v24i12.21 ◽

2021 ◽

Vol 24 (12) ◽

pp. 2147-2151

Author(s):

Y.A. Dallatu ◽

G.A. Shallangwa ◽

S.N. Africa

Keyword(s):

Electron Microscopy ◽

Plant Extract ◽

Zno Nanoparticles ◽

Precipitation Method ◽

Zno Nps ◽

Structural Morphology ◽

Uniform Particles ◽

Transmission Electron ◽

Seed Husk ◽

Co Precipitation

The use of plant extracts has become an interesting ecofriendly method to synthesize and stabilize the different structures nanoparticles (NPs). This work investigated the effect of plant extract as a reducing and stabilizing agent on the growth and morphology of ZnO nanoparticles (ZnO-NPs). Green synthesis and growth of spherical ZnONPs was carried out by co-precipitation method using a Zinc acetate salt and various amounts of Azadirachta indica seed husk extract (20 ml and 40 ml). The synthesized ZnO-NPs were characterized by Fourier transform infrared (FTIR), scanning electron microscopy (SEM-EDX), and transmission electron microscopy (TEM). The FTIR analyses revealed the presence of Phenolic alcohol, amines and carboxylic acid groups and ZnO in synthesized NPs with more intense peaks at higher amount (40 ml) of A. indica extract. Also, structural morphology analyses using SEM revealed uniform spherical shaped particles with diameter from 25 to 60 nm (20 ml of extract) and 19 to 35 nm (40 ml of extract) for ZnO-NPs. The EDX spectral revealed that the required phase of Zn and O was present 69.54% (Zn) and 30.46% (O) at 20 ml of extract, also 73.71% (Zn), 26.26% (O) at 40 ml of extract respectively and confirmed high purity for the synthesized ZnO NPs. TEM revealed spherical shaped NPs with diameter ranging from 28 to 52 nm (20 ml of extract) and 8.2 to 11.9 nm (40 ml of extract) respectively, with a trend reduction in particle size of NPs at higher amount of A. indica seed extract (40 ml) and growth of more uniform particles with no agglomeration. The study showed successful growth of spherical ZnO-NPs with required properties at a higher amount of extract.

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Enhanced Photocatalytic Activity of ZnO Nanoparticles Co-Doped With Rare Earth Elements (Nd and Sm) Under UV Light Illumination

10.21203/rs.3.rs-1026552/v1 ◽

2021 ◽

Author(s):

P. Baskaran ◽

A. Pramothkumar ◽

Mani P

Keyword(s):

Photocatalytic Activity ◽

Zno Nanoparticles ◽

Dye Degradation ◽

Uv Light ◽

Present Report ◽

Precipitation Method ◽

Light Illumination ◽

Zno Nps ◽

Doped Zno ◽

Co Doped

Abstract In the present report, synthesis of pure, Nd-doped (1 wt.%) and Nd/Sm (1 wt.%) co-doped Zinc Oxide (ZnO) Nanoparticles (NPs) by using simple co-precipitation method. PXRD pattern of all the synthesized samples exposes the hexagonal crystal structure of ZnO NPs without any impurity. The various functional groups presented in the synthesized samples were analyzed by FT-IR studies. From UV-Vis DRS spectra, the band gap was found to be 2.81 eV, 2.90 and 3.10 eV respectively for pure, Nd-doped and Nd-Sm co-doped ZnO NPs. PL spectrum displays the broad emission at 393and 450 nm for all the synthesized samples. The agglomeration of flower-like morphology of pure ZnO NPs, flake-like structure of Nd-doped and rod-like morphology of Nd/Sm co-doped ZnO NPs were examined by SEM. Photocatalytic activity of the prepared samples for dye degradation of Acid Orange 7 (AO-7) and Acid Red 13 (AR-13) was studied under UV light. The result revealed that, the Nd/Sm co-doped ZnO NPs found to have efficient degradation candidate materials.

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Comparative Study of Photocatalytic Activity of Ni-Doped ZnO and Zeolite Supported Ni-Doped ZnO Prepared by Co-Precipitation Method

Materials Science Forum ◽

10.4028/www.scientific.net/msf.827.25 ◽

2015 ◽

Vol 827 ◽

pp. 25-30

Author(s):

Raynaldi Philipus ◽

Annisa Noorhidayati ◽

Nadia Febiana Djaja ◽

Rosari Saleh

Keyword(s):

Methylene Blue ◽

Photocatalytic Activity ◽

Zno Nanoparticles ◽

Uv Light ◽

Active Species ◽

Precipitation Method ◽

Doped Zno ◽

Co Precipitation ◽

Supported Ni ◽

Better Than

The present study compares the photocatalytic degradation of methylene blue in the presence of natural zeolite supported Ni-doped ZnO and bare Ni-doped ZnO nanoparticles. The photocatalyst was prepared by co-precipitation method and the photocatalytic activity of the photocatalyst was investigated under UV light irradiation. The results showed that the photocatalytic efficiency of zeolite supported Ni-doped ZnO nanoparticles is better than that of bare Ni-doped ZnO nanoparticles. The influence of experimental parameters on the photodegradation of methylene blue was studied and it was observed that photocatalytic activity varied with pH, initial methylene blue concentration and the amount of photocatalyst. The scavenger technique shows that electron plays an important role in the bare Ni-doped ZnO, while in zeolite supported Ni-doped ZnO,●OH is the prominent active species.

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Photocatalytic Activity of Fe-Doped ZnO/Montmorillonite Nanocomposite for Degradation of Malachite Green

Materials Science Forum ◽

10.4028/www.scientific.net/msf.827.19 ◽

2015 ◽

Vol 827 ◽

pp. 19-24 ◽

Cited By ~ 4

Author(s):

Nur Afifah ◽

Nadia Febiana Djaja ◽

Rosari Saleh

Keyword(s):

Photocatalytic Activity ◽

Malachite Green ◽

Organic Dyes ◽

Uv Light ◽

Precipitation Method ◽

X Ray Diffraction ◽

X Ray ◽

Spin Resonance ◽

Doped Zno ◽

Co Precipitation

In this study, the photocatalytic activity of pure Fe- doped ZnO and Fe- doped ZnO/Montmorillonite nanocomposite has been investigated for the degradation of malachite green under UV light irradiation. Both photocatalysts were synthesized using co-precipitation method and characterized by X-ray diffraction, energy dispersive X-ray spectroscopy, Fourier-transform infrared absorption, and electron spin resonance. The results showed that the photocatalytic efficiency is better in the presence of montmorillonite compared to pure Fe- doped ZnO. To detect the possible reactive species involved in degradation of organic dyes control experiments with introducing scavengers into the solution of organic dyes were carried out. It is found that electron plays an important role in the degradation of malachite green.

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Photocatalytic Activity of Zeolite Supported Transition Metal-(Co2+ and Cr2+) Doped ZnO: Comparative Study

Materials Science Forum ◽

10.4028/www.scientific.net/msf.827.43 ◽

2015 ◽

Vol 827 ◽

pp. 43-48

Author(s):

Annisa Noorhidayati ◽

Mia Putri Rahmawati ◽

Nadia Febiana Djaja ◽

Rosari Saleh

Keyword(s):

Transition Metal ◽

Zno Nanoparticles ◽

Diffuse Reflectance Spectroscopy ◽

Uv Light ◽

Transition Metal Ions ◽

Precipitation Method ◽

X Ray Diffraction ◽

X Ray ◽

Doped Zno ◽

Co Precipitation

Transition metal ions (Co and Cr) doped ZnO nanoparticles supported on natural zeolite were synthesized using co-precipitation method. The synthesized samples were characterized by means of X-ray diffraction, energy dispersive X-ray, Fourier-transform infrared absorption, and UV-visible diffuse reflectance spectroscopy. The samples were further used as photocatalyst for degradation of methyl orange and methylene blue in aqueous solutions under UV light irradiation. The results showed that zeolite supported Cr-doped ZnO nanoparticles is more efficient compared with zeolite supported Co-doped ZnO nanoparticles. It is also revealed that zeolite supported samples possessed higher photocatalytic efficiency compared to bare samples.

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Effect of silver doping on structural and photocatalytic circumstances of ZnO nanoparticles

Iraqi Journal of Nanotechnology ◽

10.47758/ijn.vi1.22 ◽

2020 ◽

pp. 13-20

Author(s):

Luma Ahmed ◽

Eitemad S. Fadhil ◽

Ayad F. Mohammed

Keyword(s):

Zno Nanoparticles ◽

Precipitation Method ◽

Methyl Green ◽

Zno Nanoparticle ◽

Zno Nps ◽

Force Microscopy ◽

Ft Ir ◽

Doped Zno ◽

Co Precipitation ◽

Artificial Uv

This article describes the synthesis of ZnO nanoparticles (Nps) using the co-precipitation method and then calcinated at 500oC for 2 h. The photo activity of ZnO nanoparticles was examined in photo decolorization of methyl green dye under artificial UV -A light. This prepared photocatalyst (ZnO Np) was modified his surface by 2% Ag doped using the photo deposition method under inert gas for 3h. The characterization of undoped and 2% Ag doped ZnO Nps were estimated by Fourier-transform infrared spectroscopy (FT-IR), X-ray Diffraction (XRD), and Atomic force microscopy (AFM). In FT-IR analysis, the new peaks occurred around 624-778 cm-1 confirmed the Ag really is doped on prepared ZnO Np. Based on data from XRD, the mean crystal size was reduced with doped the 2% Ag. The AFM images for the prepared photocatalysts ensure that the shapes of all samples are semi-spherical with nanometer size. Series of kinetics experiments were performed for the photocatalytic decolourization of methyl green dye using undoped and 2% Ag doped ZnO nanoparticle and found to be pseudo-first-order kinetics.

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Physical Properties and Photocatalytic Activity of Fe- and Co-Doped ZnO Nanoparticles Synthesized via Surfactant Modified Co-Precipitation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1123.241 ◽

2015 ◽

Vol 1123 ◽

pp. 241-246 ◽

Cited By ~ 1

Author(s):

Annisa Noorhidayati ◽

Siti Adriani ◽

Rosari Saleh

Keyword(s):

Photocatalytic Activity ◽

Diffuse Reflectance Spectroscopy ◽

Uv Light ◽

Sodium Dodecyl ◽

Precipitation Method ◽

Resonance Spectroscopy ◽

Dopant Atom ◽

Doped Zno ◽

Co Precipitation ◽

Co Doped

Fe- and Co-doped ZnO with various doping concentrations have been synthesized by co-precipitation method in the presence of sodium dodecyl sulfate as anionic surfactant. The obtained sample powders were characterized by X-ray diffraction, Fourier transform infrared absorption, UV-visible diffuse reflectance spectroscopy, electron spin resonance spectroscopy and Brunauer-Emmet-Teller (BET) method. The photocatalytic activity was evaluated by observing the decolorization of methylene blue under UV light irradiation. The results revealed that the addition of a dopant atom significantly enhanced the photocatalytic activity.

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The Influence of Montmorillonite Incorporation in Mn-Doped ZnO Nanoparticles for Photocatalytic Degradation of Organic Dyes

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1112.194 ◽

2015 ◽

Vol 1112 ◽

pp. 194-200

Author(s):

Nadia Febiana Djaja ◽

Rosari Saleh

Keyword(s):

Zno Nanoparticles ◽

Diffuse Reflectance Spectroscopy ◽

Organic Dyes ◽

Uv Light ◽

Precipitation Method ◽

X Ray Diffraction ◽

X Ray ◽

Doped Zno ◽

Co Precipitation ◽

Mn Doped

The present study compares the photocatalytic decolorization ability of bare Mn-doped ZnO and montmorillonite modified Mn-doped ZnO nanoparticles towards aqueous solution of organic dyes (methylene blue and malachite green) under UV light irradiation. Both photocatalysts were synthesized using co-precipitation method and characterized by X-ray diffraction, energy dispersive X-ray spectroscopy, Fourier-transform infrared absorption, electron spin resonance, and diffuse reflectance spectroscopy. Comparison of degradation efficiency demonstrated that montmorillonite modified Mn-doped ZnO nanoparticles exhibited higher activity than bare Mn-doped ZnO nanoparticles.

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Synthesis, characterization and photoluminescence properties of Ce3+-doped ZnO-nanophosphors

Chemical Papers ◽

10.2478/s11696-013-0442-5 ◽

2014 ◽

Vol 68 (2) ◽

Cited By ~ 27

Author(s):

Sudheesh Shukla ◽

Eric Agorku ◽

Hemant Mittal ◽

Ajay Mishra

Keyword(s):

Electron Microscopy ◽

Green Emission ◽

Zinc Nitrate ◽

Energy Dispersive ◽

Precipitation Method ◽

X Ray ◽

Transmission Electron ◽

Cerium Ion ◽

Doped Zno ◽

Co Precipitation

AbstractThe present study involves the synthesis of Ce3+ doped ZnO nanophosphors by the zinc nitrate and cerium nitrate co-precipitation method. The synthesized nanophosphors were characterized with respect to their crystal structure, crystal morphology, particle size and photoluminescence (PL) properties using X-ray diffraction (XRD), scanning electron microscopy (SEM)/energy dispersive X-ray (EDX), transmission electron microscopy (TEM)/Energy-dispersive X-ray spectroscopy (EDS) and PL-spectroscopy respectively. XRD results revealed that ZnO nanophosphors are single phase and cubic type structures. Further, PL spectra of ZnO:Ce3+ nanophosphors showed green emission because of the charge transfer at single occupied oxygen vacancies with ZnO holes and red emission due to the cerium ion transitions. Intensity and fine structure of the Ce3+ luminescence and its temperature dependence are strongly influenced by the doping conditions. The formation of ZnO:Ce3+ nanophosphors was confirmed by Fourier transform infrared (FTIR) and XRD spectra.

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Fe-Doped ZnO Nanoparticles: Structural, Morphological, Antimicrobial and Photocatalytic Characterization

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1143.233 ◽

2017 ◽

Vol 1143 ◽

pp. 233-239 ◽

Cited By ~ 2

Author(s):

Viorica Mușat ◽

Mariana Ibănescu ◽

Dana Tutunaru ◽

Florentina Potecaşu

Keyword(s):

Zno Nanoparticles ◽

Uv Light ◽

Precipitation Method ◽

X Ray Diffraction ◽

Zno Nps ◽

Oxide Semiconductors ◽

Mueller Hinton ◽

Vis Spectroscopy ◽

Mueller Hinton Agar ◽

Doped Zno

Oxide semiconductors have attracted increasing interest due to their potential in solving environmental problems. ZnO-based nanoparticles (NPs) are among the most investigated for efficient disinfection and microbial control.Iron-doped zinc oxide nanoparticles (Fe:ZnO NPs) were successfully fabricated through precipitation method at low temperature followed by thermal treatment. The obtained Fe:ZnO NPs were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and ultraviolet-visible (UV–Vis) spectroscopy. The effect of iron content on structural, morphological, antimicrobial and photocatalytic properties was investigated and discussed.The photocatalytic activity of the nanoparticles was tested by degradation of methylene blue (MB) solution under UV light for 60 min irradiation. The antibacterial activity was determined by paper disc method on Mueller-Hinton agar against the Gram-negative bacteria Escherichia coli (E. coli) and the Gram-positive bacteria Staphylococcus aureus (S. aureus) and compared to that of the undoped ZnO NPs. Consistent improvement on the photocatalytic and antimicrobial activity of Fe-doped ZnO nanoparticles was noticed.

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