Synthesis and Characterization of Zinc Oxide Obtained by Combining Zinc Nitrate with Sodium Hydroxide in Polyol Medium

Biron, Dionisio da Silva; Santos, Venina dos; Bergmann, Carlos Pérez

doi:10.1590/1980-5373-mr-2020-0080

Cited by 30 publications

(10 citation statements)

References 38 publications

(42 reference statements)

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“…For larger grain sizes, there is an increase in the crystallinity of the structures [31]. Other techniques like spray pyrolysis, co-precipitation, DC magnetron sputtering, sol-gel, spin coating, and thermal synthesis obtained sizes of 34.7, 32, 23.66, 42-47, and 14 nm [1,18,[33][34][35]. The large crystallite sizes in this work can be explained by the high concentration of titanium dioxide, above 10%, and the heat treatment at 450 °C [17].…”

Section: Resultsmentioning

confidence: 99%

Synthesis of TiO2/ZnO photoanodes on FTO conductive glass for photovoltaic applications

et al. 2023

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For oxide semiconductors for application in dye-sensitized solar cells (DSSCs), titanium dioxide conjugated with zinc oxide thin films was synthesized and characterized. The UV (ultraviolet) spectrum characterization showed a peak of absorbance at around 355 nm, with a band gap of 3.25 eV and reflectance around 85%. Such characteristics allowed the fabrication of DSSCs with N719 dye, under simulated light of 100 mW/cm 2 . The highest efficiency of 1.17% was at 5% titanium dioxide and 4 h of dye immersion.

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Section: Resultsmentioning

confidence: 99%

Synthesis of TiO2/ZnO photoanodes on FTO conductive glass for photovoltaic applications

et al. 2023

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“…Figure 1 a shows the schematic of the preparation of pristine ZnO NRs and deposition on the sensor substrate. Formation mechanism of ZnO NRs can be shown by Equations (1)–(5) [ 33 , 34 ]: Zn(NO 3 ) 2 .6H 2 O + H 2 O → Zn 2+ (s) + NO 3 − (s) NaOH + H 2 O → Na + (s) + OH − (s) Zn 2+ (s) + NO 3 − (s) + Na + (s) + OH − (s) → Zn (OH) 2(s) + 2NaNO 3(s) Zn (OH) 2(s) → ZnO (s) + H 2 O (L)

…”

Section: Methodsmentioning

confidence: 99%

Sensitivity Enhancement of Resistive Ethanol Gas Sensor by Optimized Sputtered-Assisted CuO Decoration of ZnO Nanorods

Madvar

Kordrostami

Mirzaei

2022

Sensors

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In this study, sputtered-assisted CuO-decorated ZnO nanorod (NR) gas sensors were fabricated for ethanol gas sensing studies. CuO nanoparticles have been successfully formed on ZnO nanorods by means of a physical process as the decorative metallic element. The amount of decoration affecting the sensor’s performance has been optimized. Cu layers with different thicknesses of 5, 10, and 20 nm were deposited on hydrothermally grown ZnO NRs using the sputtering technique. Upon subsequent annealing, Cu was oxidized to CuO. The gas sensing studies revealed that the sensor with an initial Cu layer of 5 nm had the highest response to ethanol at 350 °C. The sensor also showed good selectivity, repeatability, and long-term stability. The enhanced ethanol sensing response of the optimized gas sensor is related to the formation of p-n heterojunction between p-type CuO and n-type ZnO and the presence of the optimal amount of CuO on the surface of ZnO NRs. The results presented in this study highlight the need for optimizing the amount of Cu deposition on the surface of ZnO NRs in order to achieve the highest response to ethanol gas.

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“…-Chemical scheme 1 2.4.1 ZnO NPs stabilized with PVP (ZnO NPs (a)): In one batch, 0.01 gm polyvinyl pyrrolidone (PVP) (m.w. 24000) was added as a binder-cum-stabilizer and stirred at 600 rpm for 90 minutes to have a controlled and uniform particle size of PVP stabilized-nanoparticles (ZnO-NPs), expected to be in the nanometer range [12,13,14].…”

Section: Synthesis Of Zno Nanoparticles (Zno Nps)mentioning

confidence: 99%

“…The network has computational units in such a way that mimics the biological structure of the human brain [17 -19]. To optimize the proposed model better, there are multiple connections within and between the layers in terms of weights used for storing and learning the information [14,15]. ANN network for the current study had been developed in order to cater to the requirements of the gas hydrate formation process, which is represented in Figure 2.…”

Section: Artificial Neural Network (Ann) Modelingmentioning

confidence: 99%

Experimental and modeling study of the methane gas hydrate formation using ZnO nanoparticles

Bhavikkumar¹,

Mahant²,

Kushwaha³

et al. 2022

Preprint

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This work presents the investigations of the application of synthesized ZnO nanoparticles to methane gas hydrate formation. The ZnO nanoparticles were synthesized in one-pot synthesis with an application of binding chemicals to control the size of the nanoparticles. The addition of surfactant imparts better gas hydrate formation properties to the ZnO particles apart from mass transfer enhancement. The characterization of nanoparticles was performed using complementary analytical facilities. The characterization confirms the presence of organic molecules as a binding component of nanoparticles. The comparative study of gas hydrate formation using ZnO nanoparticles was performed with pure water. The experimental results proved that the impact of nanoparticles could enhance or inhibit the gas hydrate formation based on the additives used during the synthesis. The experimental results were further confirmed with the help of artificial intelligence in deep learning based artificial neural network modeling. The model predicted results mimic the experimental results very well and can further be used to develop the nanoparticle-based gas hydrate formation study. The experimental and modeling study signifies the impact of ZnO nanoparticles on methane gas uptake in the form of gas hydrate and opens up new opportunities to develop sustainable, efficient, and inexpensive processes.

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Synthesis and Characterization of Zinc Oxide Obtained by Combining Zinc Nitrate with Sodium Hydroxide in Polyol Medium

Cited by 30 publications

References 38 publications

Synthesis of TiO2/ZnO photoanodes on FTO conductive glass for photovoltaic applications

Synthesis of TiO2/ZnO photoanodes on FTO conductive glass for photovoltaic applications

Sensitivity Enhancement of Resistive Ethanol Gas Sensor by Optimized Sputtered-Assisted CuO Decoration of ZnO Nanorods

Experimental and modeling study of the methane gas hydrate formation using ZnO nanoparticles

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