Synthesis and characterization of zinc oxide nanoparticles via oxalate co-precipitation method

Mahmood, Natheer B.; Saeed, Farqad R.; Gbashi, Kadhim R.; Mahmood, Um-Salama

doi:10.1016/j.mlblux.2022.100126

Cited by 24 publications

(15 citation statements)

References 19 publications

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“…All the peaks were indexed with space group P63mc with standard JCPDS card (01-079-0205) and confirmed the formation of hexagonal structure of ZnO nanorods. The lattice parameters, calculated from the planes (100) and (002) are a = 3.2288 Ǻ and c = 5.1812 Ǻ and c/a = 1.6 is close to the ideal value for the hexagonal lattice [15]. The average calculated crystallite size of the ZnO nanorods was 23 nm using the Scherrer Debye formula from the full width at half maximum of the four highest intensity peaks.…”

Section: Resultssupporting

confidence: 55%

ZnO based ultrasensitive CO chemiresistive gas sensor

Dhall,

Sood,

Prakash

et al. 2024

Phys. Scr.

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The detection of environmental gases in the atmosphere is a topic of interest for public security, environmental pollution and industrial emission. In recent years, semiconductor-based gas sensor attracted wide attention in all over the world. Among various hazardous gases, detection of CO at low temperature with fast response and recovery time is still a challenge. In this work, we have adopted single step synthesis of zinc oxide (ZnO) nanoroads for the fabrication of CO gas sensor. This sensor is found to have ~8% sensitivity with fast response time of the order of 10s at 50C. Also, selectivity of these sensors has been investigated for different gases and observed that ZnO are more active for CO gas at 50C. The sensitivity of ZnO based sensor is explained in terms of interaction of CO molecules with adsorbed oxygen vacancies in ZnO which promote better pathway to the charge carrier. The sensing material was characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). To, the best our knowledge, the detection of 15 ppm CO at 50 with good sensitivity is reported first time.

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Section: Resultssupporting

confidence: 55%

ZnO based ultrasensitive CO chemiresistive gas sensor

Dhall,

Sood,

Prakash

et al. 2024

Phys. Scr.

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“…[ 39 ] Co–precipitation Spherical/Aggregated 80 nm Mahmood et al . [ 40 ] Precipitation Spherical 20–40 nm Ghorbani et al . [ 41 ] …”

Section: Resultsmentioning

confidence: 99%

Synthesis of nanosize zinc oxide through aqueous sol–gel route in polyol medium

et al. 2022

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Background This study is aimed to synthesize nanosize zinc oxide by acid catalyzed sol–gel process using zinc nitrate hexahydrate as precursor, aqueous isopropanol as solvent and glycerin for making polyol system. The polyol mediated procedure was employed in combination with calcination induced synthesis of nanoparticles of numerous sizes obtained with the variation in calcination temperature from 500 to 900 ℃. The crystal structure of the prepared samples was characterized by X-ray diffraction analysis (XRD). Infrared spectroscopy (IR) was used to identify the surface hydroxyl groups. Thermal stability was confirmed by differential scanning calorimetry-thermogravimetric analysis (DSC-TGA) whereas field emission scanning electron microscopy (FESEM) was used to study the surface morphology of nanoparticles. Results Results revealed the formation of hexagonal wurtzite structure of irregular shaped nanoparticles having size ranging from 50–100 nm. However, the particles combined to form agglomerates of 200–400 nm with the rise in calcination temperature. Conclusions These results indicate that nanosize zinc oxide can be synthesized successfully by a simple process comprising of glycerin as a low-cost, non-toxic and eco-friendly polyol followed by calcination at ambient temperatures.

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“…25-1029 (space group Cccm). [33][34][35] The obtained XRD pattern reveals the presence of water of crystallisation in the synthesized sample. [32,33] XPS analyses were carried out to explore the oxidation state of the metal species present in the sample.…”

Section: Composition and Structural Purity Of Znc 2 O 4 2h 2 O Nanocr...mentioning

confidence: 89%

Hydrothermally Developed ZnC₂O₄.2H₂O Nanocrystals as Efficient Copper‐free Catalyst for the Synthesis of 1,4‐Disubstituted 1,2,3‐Triazoles in Water

et al. 2023

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In this work, we report the synthesis of nanostructured ZnC 2 O 4 .2H 2 O with irregular sheet-like morphology using a simple hydrothermal procedure. The as-synthesized ZnC 2 O 4 .2H 2 O nanocrystal (ZnC 2 O 4 NC) is very stable and therefore, explored for the first time as highly efficient recyclable catalyst for the azide-alkyne cycloaddition (AAC) reaction. Our catalytic protocol is highly efficient and amenable to a variety of aromatic/aliphatic azide and alkyne substrates under mild reaction condition to afford regioselective 1,4-disubstituted 1,2,3-triazoles with good to excellent yields. Also, for the one pot synthesis of desired products, the developed method is exceedingly sustainable where azides are formed in-situ from their respective precursors. Our catalytic results outperformed most of the reported state-ofthe-art works involving copper free nanoparticulate and zincbased catalysts. All the original features of the recovered catalyst remained intact after 5 th catalytic cycle which clearly suggests the efficiency of the Zn-based stable nanostructured material as alternative copper free catalysts for AAC reactions. The developed methodology could be extended for gramscale synthesis of 1,2,3-triazoles.

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Synthesis and characterization of zinc oxide nanoparticles via oxalate co-precipitation method

Cited by 24 publications

References 19 publications

ZnO based ultrasensitive CO chemiresistive gas sensor

ZnO based ultrasensitive CO chemiresistive gas sensor

Synthesis of nanosize zinc oxide through aqueous sol–gel route in polyol medium

Hydrothermally Developed ZnC₂O₄.2H₂O Nanocrystals as Efficient Copper‐free Catalyst for the Synthesis of 1,4‐Disubstituted 1,2,3‐Triazoles in Water

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Synthesis and characterization of zinc oxide nanoparticles via oxalate co-precipitation method

Cited by 24 publications

References 19 publications

ZnO based ultrasensitive CO chemiresistive gas sensor

ZnO based ultrasensitive CO chemiresistive gas sensor

Synthesis of nanosize zinc oxide through aqueous sol–gel route in polyol medium

Hydrothermally Developed ZnC2O4.2H2O Nanocrystals as Efficient Copper‐free Catalyst for the Synthesis of 1,4‐Disubstituted 1,2,3‐Triazoles in Water

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Hydrothermally Developed ZnC₂O₄.2H₂O Nanocrystals as Efficient Copper‐free Catalyst for the Synthesis of 1,4‐Disubstituted 1,2,3‐Triazoles in Water