Low-level NO gas sensing properties of 
                
                  
                
                $$\hbox {Zn}_{1-x}\hbox {Sn}_{x}\hbox {O}$$
                
                  
                    
                      
                        Zn
                        
                          1
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                          x
                        
                      
                      
                        Sn
                        x

Er, İrmak Karaduman; Çağırtekin, Ali Orkun; Çorlu, Tuğba; Yıldırım, Mehmet Ali; Ateş, Aytunç; Acar, Selim

doi:10.1007/s12034-018-1714-z

Cited by 15 publications

(3 citation statements)

References 19 publications

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“…In order to meet the above-mentioned requirements, a great number of materials have been tested as sensing elements against NO gas and using various sensing techniques, such as looking for a change in electrical resistance (chemoresistive sensor) [7], optical sensors [8] or surface acoustic wave devices [9,10]. Among them, chemoresistive sensors are by far the most investigated due to the simplicity of the measurement as well as the great variety of materials that can be used in this technique; however, most of them require a high operating temperature [1,2,[11][12][13][14] or UV irradiation [15][16][17] in order to detect NO gas concentrations below the TLV, leading to extra energy consumption. Thus, only a few works have been reported on NO detection at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Room-Temperature Nitric Oxide Gas Sensors Based on NiO/SnO2 Heterostructures

Gagaoudakis,

Tsakirakis,

Moschogiannaki

et al. 2023

Sensors

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Nitric oxide (NO) is a very well-known indoor pollutant, and high concentrations of it in the atmosphere lead to acid rain. Thus, there is great demand for NO sensors that have the ability to work at room temperature. In this work, NiO/SnO2 heterostructures have been prepared via the polyol process and were tested against different concentrations of NO gas at room temperature. The structural and morphological characteristics of the heterostructures were examined using X-ray diffraction and scanning electron microscopy, respectively, while the ratio of NiO to SnO2 was determined through the use of energy-dispersive spectrometry. The effects of both pH and thermal annealing on the morphological, structural and gas-sensing properties of the heterostructure were investigated. It was found that the morphology of the heterostructures consisted of rod-like particles with different sizes, depending on the temperature of thermal annealing. Moreover, NiO/SnO2 heterostructures synthesized with pH = 8 and annealed at 900 °C showed a response of 1.8% towards 2.5 ppm NO at room temperature. The effects of humidity as well as of stability on the gas sensing performance were also investigated.

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Section: Introductionmentioning

confidence: 99%

Room-Temperature Nitric Oxide Gas Sensors Based on NiO/SnO2 Heterostructures

Gagaoudakis,

Tsakirakis,

Moschogiannaki

et al. 2023

Sensors

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“…Çok farklı teknolojilerde üretilmiş gaz sensörleri mevcuttur. Bunlardan bazıları, metal oksit yarı iletkenler (MOS), modifiye metal oksit yarı iletkenler (MMOS), iletken polimerler (CP) , kütle akustik dalga (BAW), kuvars kristal mikrobalanslar (QCM), kimyasal alan etkili transistörler (ChemFET), fiber optik (FO) sensörlerdir [9][10][11]. Düşük maliyetleri ve üretimlerinin kolaylığı gibi nedenlerden dolayı gaz sensör çalışmalarında çoğunlukla ZnO, TiO2, WO3 ve SnO2 vb metal oksit malzemeleri (MOS) yaygın olarak kullanılmaktadır [11][12].…”

Section: Gi̇ri̇ş (Introduction)unclassified

“…Bunlardan bazıları, metal oksit yarı iletkenler (MOS), modifiye metal oksit yarı iletkenler (MMOS), iletken polimerler (CP) , kütle akustik dalga (BAW), kuvars kristal mikrobalanslar (QCM), kimyasal alan etkili transistörler (ChemFET), fiber optik (FO) sensörlerdir [9][10][11]. Düşük maliyetleri ve üretimlerinin kolaylığı gibi nedenlerden dolayı gaz sensör çalışmalarında çoğunlukla ZnO, TiO2, WO3 ve SnO2 vb metal oksit malzemeleri (MOS) yaygın olarak kullanılmaktadır [11][12]. ZnO oda sıcaklığında 3,3 eV yasak enerji aralığına, 10-1-10-4 Ω.cm özdirencine, 0,74 angstron iyonik yarıçapına ve 1,65 elektron negatifliğine sahip, piezo elektrik, yüksek enerjili radyasyon dayanımı olan kristal yapıda önemli bir malzemedir.…”

Section: Gi̇ri̇ş (Introduction)unclassified

Gas Sensor Applications of Tungsten Doped ZnO Thin Films in Low Hydrogen Gas Concentration

2021

Politeknik Dergisi

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Son zamanlarda, dizel, benzin ve propan gazı gibi fosil kaynaklardan gelen enerjinin yerini alabilecek alternatif bir enerji kaynağı olarak hidrojen gazının uygulanması için çalışmalar hızla önem kazanmaya başlamıştır. Bu nedenle, hidrojen gazı, vaat edilen alternatif bir enerji kaynağı olmanın ötesine geçtiği başlıca enerji kaynaklarından biri olarak kabul edilmektedir. Ancak, hidrojen gazı patlayıcıdır ve büyük bir yangına neden olabilir. Bu gazın rengi, kokusu ve tadı olmadığından, güvenlik için minimum miktarda hidrojen gazı algılayabilen çok hassas bir gaz sensörü üretimi yapılmalıdır. Dahası, hidrojen gazı son derece hafiftir ve atmosfere kolayca yayılır. Gaz konsantrasyonu % 4'ün üzerinde olduğunda bir patlama meydana gelebilir; bu nedenle ppm ölçekli hidrojen gazı algılayabilen sensörler geliştirilmelidir. Bu çalışmada Tungten (W) katkılı ZnO ince filmler kimyasal banyolama tekniği ile %1 ve % 2 katkılı olarak büyütüldü ve Hidrojen gaz (H2) algılama özellikleri incelendi. Üretilen numunenin farklı sıcaklıklarda (30°C-160°C) ve 5 ppm-100 ppm gaz konsantrasyonu aralığında elektriksel karakterizasyonu yapıldı. Çalışma sıcaklığı 100 C olarak bulundu. Sensörler, 5 ppm H2 gaz konsantrasyonuna karşı kabul edilebilir düzeyde duyarlılık sergiledi. %1 W-katkılı ZnO ince film 100 °C çalışma sıcaklığında diğer ince filmlere kıyasla daha yüksek algılama performansı gösterdi. %1 W-katkılı ZnO ince film 5 ppm H2 gazına karşı % 28,56 duyarlılık sergilerken, %2 W-katkılı ZnO ince film % 7 duyarlılık sergilediği hesaplandı. Ölçüm sonuçları, numunelerin gaz algılama özelliklerinin katkılamaya bağlı olarak değiştiğini gösterdi.

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Effect of Ni and Al doping on structural, optical, and CO₂ gas sensing properties of 1D ZnO nanorods produced by hydrothermal method

Bulut

Öztürk

Acar

2021

Microscopy Res & Technique

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In the present study, the one‐dimensional ZnO nanorod structures are produced within the different nickel and aluminum molecular weight ratios of 0–7% using the hydrothermal method. It is found that the aluminum (Al) and nickel (Ni) impurities with different ionic radius, chemical valence, and electron configurations of outer shell cause to vary the fundamental characteristic features including the crystallinity quality, crystallite size, surface morphology, nanorod diameter, optical absorbance, energy band gap, resistance, gas response, and gas sensing properties. The structural analyses performed by powder X‐ray diffraction (XRD) and scanning electron microscopy (SEM) indicate that the samples are found to crystallize in the hexagonal wurtzite structure. The presence of optimum nickel and aluminum in the crystal system improves considerably the crystallinity quality and surface morphology. Additionally, the combination of electron dispersive X‐ray (EDX) and XRD results declare that the Ni and Al impurities incorporate successfully into the ZnO crystal structure. Moreover, the diameters of nanorod structures in 1D orientation are determined to be 80 nm or below. The hexagonal wurtzite‐type ZnO nanorod structure prepared by 5% Ni has more space between the nanorods and thus presents higher response to the CO2 detection. Further, the optical absorbance spectra display that the band gap value is observed to decrease regularly with the increment in the doping level as a result of band shrinkage effect depending on the enhancement of mobile hole carrier concentrations in the crystal structure. In other words, the doping mechanism leads to vary the homogeneities in the interfacial charges, nanorod diameters, ZnO oxide layer composition and thickness. The last test conducted in this study is responsible for the determination of CO2 gas sensing levels. The obtained gas sensing results are further compared with each other and literature findings. It is observed that 5% Ni‐doped sample provides more successful results than other samples in the sensing CO2 gas at the different concentrations. All in all, the paper establishing a strong methodology between doping mechanism and change in the fundamental characteristic features of hexagonal wurtzite‐type ZnO with the aid of advanced microscopy techniques will become pioneering research to answer key questions in materials sciences and electronic research.

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Low-level NO gas sensing properties of $$\hbox {Zn}_{1-x}\hbox {Sn}_{x}\hbox {O}$$ Zn 1 - x Sn x

Cited by 15 publications

References 19 publications

Room-Temperature Nitric Oxide Gas Sensors Based on NiO/SnO2 Heterostructures

Room-Temperature Nitric Oxide Gas Sensors Based on NiO/SnO2 Heterostructures

Gas Sensor Applications of Tungsten Doped ZnO Thin Films in Low Hydrogen Gas Concentration

Effect of Ni and Al doping on structural, optical, and CO₂ gas sensing properties of 1D ZnO nanorods produced by hydrothermal method

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Low-level NO gas sensing properties of $$\hbox {Zn}_{1-x}\hbox {Sn}_{x}\hbox {O}$$ Zn 1 - x Sn x

Cited by 15 publications

References 19 publications

Room-Temperature Nitric Oxide Gas Sensors Based on NiO/SnO2 Heterostructures

Room-Temperature Nitric Oxide Gas Sensors Based on NiO/SnO2 Heterostructures

Gas Sensor Applications of Tungsten Doped ZnO Thin Films in Low Hydrogen Gas Concentration

Effect of Ni and Al doping on structural, optical, and CO2 gas sensing properties of 1D ZnO nanorods produced by hydrothermal method

Contact Info

Product

Resources

About

Effect of Ni and Al doping on structural, optical, and CO₂ gas sensing properties of 1D ZnO nanorods produced by hydrothermal method