One-step synthesis of high purity ZnO micro/nanostructures from pure Zn and pre-alloyed brass powders by vapor phase transport

Nosrati, Parvin; Khoshghadam-Pireyousefan, Mohammad; Mohammadzadeh, Ahad; Azadbeh, Maziyar; Hayati, Mina; Mostafaei, Amir

doi:10.1016/j.ceramint.2020.01.200

Ceramics International

2020

DOI: 10.1016/j.ceramint.2020.01.200

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One-step synthesis of high purity ZnO micro/nanostructures from pure Zn and pre-alloyed brass powders by vapor phase transport

Parvin Nosrati

Mohammad Khoshghadam-Pireyousefan

Ahad Mohammadzadeh

et al.

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Cited by 9 publications

(1 citation statement)

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“…Compared to the most popular ZnO chemical synthesis techniques (successive ionic layer adsorption and reaction, chemical bath deposition, vapor phase transport, chemical precipitation, and electrochemical), hydrothermally assisted fabrications have recently proved to be superior in industrial-scale applications. Hydrothermal synthesis is a versatile and effective technique that involves the use of high-pressure and moderate-temperature steam to synthesize materials.…”

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confidence: 99%

Advanced NH₃ Detection by 1D Nanostructured La:ZnO Sensors with Novel Intrinsic p–n Shifting and Ultrahigh Baseline Stability

Ajjaq,

Bulut,

Ozturk

et al. 2024

ACS Sens.

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Due to its stability, transportability, and ability to be produced using renewable energy sources, NH 3 has become an attractive option for hydrogen production and storage. Detecting NH 3 is then essential, being a toxic and flammable gas that can pose dangers if not properly monitored. ZnO chemiresistive sensors have shown great potential in real NH 3 monitoring applications; yet, research and development in this area are ongoing due to reported limitations, like baseline instabilities and sensitivity to environmental factors, including temperature, humidity, and interferent gases. Herein, we suggest an approach to obtain sensors with competitive performance based on ZnO semiconducting metal oxides. For this purpose, one-dimensional nanostructured pure and La-doped ZnO films were synthesized hydrothermally. Incorporating large rare earth ions, like La, into the bulk lattice of ZnO is challenging and can lead to surface defects that are influential in gassensing reactions. The sensors experienced a temperature-induced p−n shifting at about 100 °C, verified by the Hall effect and AC impedance measurements. The doped sensor showed exceptional stepwise baseline stability and outstanding performance at a relatively low operating temperature (150 °C) with a sensing response of 91 at best (@ 50 ppm NH 3 ) and recorded a tolerance to water vapor up to 70% RH. Alongside p−n shifting, the enhanced performance was discussed in correlation with La doping-triggered changes in the nanostructural and surfacial properties of the films. We validated the proposed technique by producing similar sensors and performing multiple replicates to ensure consistency and reproducibility. We also introduced the fill factor concept into the gas sensor field as a new trustworthy parameter that could improve sensor performance assessment and help rate sensors based on deviation from ideality.

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confidence: 99%

Advanced NH₃ Detection by 1D Nanostructured La:ZnO Sensors with Novel Intrinsic p–n Shifting and Ultrahigh Baseline Stability

Ajjaq,

Bulut,

Ozturk

et al. 2024

ACS Sens.

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Highly porous, flexible and robust cellulose acetate/Au/ZnO as a hybrid photocatalyst

Abad

Mozammel

Moghaddam

et al. 2020

Applied Surface Science

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Improved optoelectrical performance of nanostructured ZnO/porous silicon photovoltaic devices

Naderi,

Ahmad,

Ismail

2024

Ceramics International

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One-step synthesis of high purity ZnO micro/nanostructures from pure Zn and pre-alloyed brass powders by vapor phase transport

Cited by 9 publications

References 45 publications

Advanced NH₃ Detection by 1D Nanostructured La:ZnO Sensors with Novel Intrinsic p–n Shifting and Ultrahigh Baseline Stability

Advanced NH₃ Detection by 1D Nanostructured La:ZnO Sensors with Novel Intrinsic p–n Shifting and Ultrahigh Baseline Stability

Highly porous, flexible and robust cellulose acetate/Au/ZnO as a hybrid photocatalyst

Improved optoelectrical performance of nanostructured ZnO/porous silicon photovoltaic devices

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Product

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About

One-step synthesis of high purity ZnO micro/nanostructures from pure Zn and pre-alloyed brass powders by vapor phase transport

Cited by 9 publications

References 45 publications

Advanced NH3 Detection by 1D Nanostructured La:ZnO Sensors with Novel Intrinsic p–n Shifting and Ultrahigh Baseline Stability

Advanced NH3 Detection by 1D Nanostructured La:ZnO Sensors with Novel Intrinsic p–n Shifting and Ultrahigh Baseline Stability

Highly porous, flexible and robust cellulose acetate/Au/ZnO as a hybrid photocatalyst

Improved optoelectrical performance of nanostructured ZnO/porous silicon photovoltaic devices

Contact Info

Product

Resources

About

Advanced NH₃ Detection by 1D Nanostructured La:ZnO Sensors with Novel Intrinsic p–n Shifting and Ultrahigh Baseline Stability

Advanced NH₃ Detection by 1D Nanostructured La:ZnO Sensors with Novel Intrinsic p–n Shifting and Ultrahigh Baseline Stability