Comparative study of Al-doped ZnO films deposited by sol–gel and by sputtering using a sintered target from ZnO nanoparticles synthesized by sol–gel

ZnO and Sb-doped ZnO nanoparticles were successfully prepared using sol-gel technique. Different concentrations of triethanolamine (TEA) were utilized as the preparation procedure to act as complexing agent that enhances the doping probability of the formed Sb-doped ZnO nanopowder. Thick films of the prepared nanopowders were fabricated with spinner coating. Morphological characteristics, phase structure, chemical composition, thermal stability, and optical properties of the prepared nanopowders were measured and analyzed. The average crystallite size of ZnO and ZnO:Sb powders ranged between 19–28 nm according to the XRD calculations and TEM observations. The gas sensitivity of the homemade devices based on Sb-doped ZnO nanoparticles towardsO2andCO2gases as a function of temperature was measured and compared with undoped ZnO films. The gas sensitivity of the films was greatly improved after doping with Sb and reached its maximum value of ~86% forO2gas at 93:7 wt% of Zn:Sb.

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Comparative Study of Pure Zno and Copper Doped Zno Nanoparticles Synthesised via Co-Precipitation Method

ScieXplore International Journal of Research in Science ◽

10.15613/sijrs/2014/v1i2/67542 ◽

2014 ◽

Vol 1 (2) ◽

pp. 73 ◽

Cited By ~ 1

Author(s):

V. Kalaiselvi ◽

N. Jayamani ◽

M. Revathi

Keyword(s):

Comparative Study ◽

Zno Nanoparticles ◽

Precipitation Method ◽

Doped Zno ◽

Co Precipitation

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Role of Sm3+ Doping on Structural, Optical and Photoluminescence Properties of ZnO Nanoparticles Synthesized by Sol-gel Auto- combustion Method

Current Nanomaterials ◽

10.2174/2405461505999200930141732 ◽

2020 ◽

Vol 5 (3) ◽

pp. 236-251

Author(s):

Eshwara I. Naik ◽

Halehatty S.B. Naik ◽

Ranganaik Viswanath

Keyword(s):

Zno Nanoparticles ◽

Sol Gel ◽

Combustion Method ◽

Content Increase ◽

Photoluminescence Properties ◽

Tem Analysis ◽

Auto Combustion ◽

Ion Doping ◽

Doped Zno ◽

Pl Intensity

Background: Various interesting consequences are reported on structural, optical, and photoluminescence properties of Zn1-xSmxO (x=0, 0.01, 0.03 and 0.05) nanoparticles synthesized by sol-gel auto-combustion route. Objective: This study aimed to examine the effects of Sm3+-doping on structural and photoluminescence properties of ZnO nanoparticles. Methods: Zn1-xSmxO (x=0, 0.01, 0.03 and 0.05) nanoparticles were synthesized by sol-gel auto combustion method. Results: XRD patterns confirmed the Sm3+ ion substitution through the undisturbed wurtzite structure of ZnO. The crystallite size was decreased from 24.33 to 18.46 nm with Sm3+ doping. The hexagonal and spherical morphology of nanoparticles was confirmed by TEM analysis. UV-visible studies showed that Sm3+ ion doping improved the visible light absorption capacity of Sm3+ iondoped ZnO nanoparticles. PL spectra of Sm3+ ion-doped ZnO nanoparticles showed an orange-red emission peak corresponding to 4G5/2→6HJ (J=7/2, 9/2 and 11/2) transition of Sm3+ ion. Sm3+ ion-induced PL was proposed with a substantial increase in PL intensity with a blue shift in peak upon Sm3+ content increase. Conclusion: Absorption peaks associated with doped ZnO nanoparticles were moved to a longer wavelength side compared to ZnO, with bandgap declines when Sm3+ ions concentration was increased. PL studies concluded that ZnO emission properties could be tuned in the red region along with the existence of blue peaks upon Sm3+ ion doping, which also results in enhancing the PL intensity. These latest properties related to Sm3+ ion-doped nanoparticles prepared by a cost-efficient process appear to be interesting in the field of optoelectronic applications, which makes them a prominent candidate in the form of red light-emitting diodes.

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Effect of cobalt doping on microstructures and dielectric properties of ZnO

Canadian Journal of Chemistry ◽

10.1139/cjc-2018-0195 ◽

2019 ◽

Vol 97 (3) ◽

pp. 227-232 ◽

Cited By ~ 1

Author(s):

Ye Zhao ◽

Fan Tong ◽

Mao Hua Wang

Keyword(s):

Zno Nanoparticles ◽

Sol Gel ◽

Hexagonal Wurtzite Structure ◽

Sem Analysis ◽

Co Doping ◽

In Doping ◽

Zno Powders ◽

Doped Zno ◽

Zno Crystal ◽

Co Doped

Pure and cobalt-doped ZnO nanoparticles (2.5, 5, 7.5, and 10 atom % Co) are synthesized by sol–gel method. The as-synthesized nanoparticles are characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and field emission scanning electron microscopy (FE-SEM) analysis. The nanoparticles of 0, 2.5, and 5 atom % Co-doped ZnO exhibited hexagonal wurtzite structure and have no other phases. Moreover, the (101) diffraction peaks position of Co-doped ZnO shift toward a smaller value of diffraction angle compared with pure ZnO powders. The results confirm that Co ions were well incorporated into ZnO crystal lattice. Simultaneously, Co doping also inhibited the growth of particles, and the crystallite size decreased from 43.11 nm to 36.63 nm with the increase in doping concentration from 0 to 10 atom %. The values of the optical band gap of all Co-doped ZnO nanoparticles gradually decreased from 3.09 eV to 2.66 eV with increasing Co content. Particular, the dielectric constant of all Co-doped ZnO ceramics gradually increased from 1.62 × 103 to 20.52 × 103, and the dielectric loss decreased from 2.36 to 1.28 when Co content increased from 0 to 10 atom %.

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Sol–gel synthesis of Ba‐doped ZnO nanoparticles and its use in varistor ceramics

Micro & Nano Letters ◽

10.1049/mnl.2018.0150 ◽

2018 ◽

Vol 13 (10) ◽

pp. 1506-1509 ◽

Cited By ~ 3

Author(s):

Rong Yang ◽

Xiao Qu ◽

Mao‐Hua Wang

Keyword(s):

Zno Nanoparticles ◽

Sol Gel ◽

Doped Zno ◽

Sol Gel Synthesis

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Preparation, structural, photoluminescence and magnetic studies of Cu doped ZnO nanoparticles co-doped with Ni by sol–gel method

Physica E Low-dimensional Systems and Nanostructures ◽

10.1016/j.physe.2015.06.012 ◽

2015 ◽

Vol 74 ◽

pp. 93-100 ◽

Cited By ~ 33

Author(s):

D. Theyvaraju ◽

S. Muthukumaran

Keyword(s):

Zno Nanoparticles ◽

Sol Gel ◽

Magnetic Studies ◽

Gel Method ◽

Sol Gel Method ◽

Doped Zno ◽

Co Doped

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SYNTHESIS OF ZnO-Аg NANOPARTICLES BY SOL-GEL METHOD

Contemporary Materials ◽

10.7251/comen1901022j ◽

2019 ◽

Vol 10 (1) ◽

Author(s):

Savka Janković ◽

Dragana Milisavić ◽

Tanja Okolić ◽

Dijana Jelić

Keyword(s):

Zno Nanoparticles ◽

Wide Spectrum ◽

Sol Gel ◽

Synthesis Method ◽

Material Surface ◽

Characterization Methods ◽

Gel Method ◽

X Ray ◽

Sol Gel Method ◽

Doped Zno

Zinc oxide is a highly applicable semiconductor material. Wide applica-tion of this nanomaterial is connected to wide spectrum of energy band gap, high bond en-ergy, great thermal conductivity, but also with its non-toxicity, antibacterial activity, bio-compatibility and biodegradability characteristics. The aim of this paper is synthesis and characterization of silver doped ZnO nanoparticles (ZnO:Ag NP) using sol-gel method. Ob-tained samples of silver doped ZnO nanoparticles were characterized by following tech-niques: Fourier-transform infrared spectroscopy (FTIR), UV/VIS spectrophotometry, X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive X-ray spec-troscopy (EDX). Efficiency of provided synthesis method was examined by FTIR spectros-copy. XRD determined the purity and crystallinity, and wurtzite structure of synthesized material. Surface morphology and the effect of doping were examined using SEM and EDX characterization methods. Results showed better conductivity after doping ZnO nanoparti-cles with silver. SEM micrographs showed ZnO:Ag NP in the form of nanorods with a par-ticle average size of 6 nm.

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