Ag Doped ZnO Nanowires as Highly Sensitive Ethanol Gas Sensor

Hastir, Anita; Kohli, Nipin; Singh, Ravi Chand

doi:10.1016/j.matpr.2017.06.207

Cited by 18 publications

(14 citation statements)

References 7 publications

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“…Noble metals have been widely used as an effective and robust additive to enhance the gas sensing performance due to the electronic and chemical sensitization, [ 178 ] such as, Au, [ 125,208,209,211–213,253–255 ] Ag, [ 60,214 , 219 , 215,256–260 ] Cu, [ 217,255,260,261 ] Pt, [ 2,88,218,219,250,262–266 ] and Pd [ 80,221,222,267–269 ] to name a few. These noble metals have been used as dopants of primary sensing materials, decorated nanoparticles, and catalysts for modulation of the electrical, chemical, and sensing properties of MOS sensing materials.…”

Section: Strategies For Enhancement Of Gas Sensing Performancementioning

confidence: 99%

1D Metal Oxide Semiconductor Materials for Chemiresistive Gas Sensors: A Review

Yang

Myung

Tran

2021

Adv Elect Materials

133

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While numerous types of gas sensors have been developed for various industries and applications such as the automotive industry, environmental monitoring, and personal safety, nanoscale chemiresistive gas sensors have gained significant research interest due to several advantages such as high sensitivity, low power consumption, and portability. An essential component of these gas sensors is the sensing material where metal oxide semiconductor (MOS) materials are the most prevalent sensing material. Since the adoption of nanoscale synthesis methods for sensing materials development, such as electrospinning and hydrothermal synthesis, many novel 1D MOS‐based nanostructured sensing materials have been demonstrated to enhance gas sensing performance. Overall, nanoengineering approaches and mechanisms for enhancement of gas sensing performance of 1D metal oxide‐based sensing materials are systematically discussed and categorized into several overarching strategies, such as tuning of materials dimension, morphology, and composition. Furthermore, integration of 1D sensing nanomaterials into sensor devices are discussed from the perspective of different chemiresistive sensor architectures and device fabrication methods. Finally, this review also discusses use of 1D MOS materials for emerging and novel electronic nose applications.

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Section: Strategies For Enhancement Of Gas Sensing Performancementioning

confidence: 99%

1D Metal Oxide Semiconductor Materials for Chemiresistive Gas Sensors: A Review

Yang

Myung

Tran

2021

Adv Elect Materials

133

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“…Currently, different researchers are engaged in improving the efficiency of photocatalysts by using metal dopants like Ag which is the most effective due to its high stability and good electrical/thermal conductivity. Furthermore, Ag doping on the surface of metal oxides employed to enhance photocatalytic activity by preventing fast e − -h + recombination processes [23,24,27,28]; also, this mechanism could lead to the generation of good antibacterial properties. In this work, Ag-doped TiO 2 and Ag-doped ZnO were synthesized using the sol-gel method, and their antibacterial activity was carefully investigated and discussed.…”

Section: Introductionmentioning

confidence: 99%

Antibacterial Activity of Ag-Doped TiO₂ and Ag-Doped ZnO Nanoparticles

Nigussie

Tesfamariam

Tegegne

et al. 2018

International Journal of Photoenergy

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We report in this paper antibacterial activity of Ag-doped TiO2 and Ag-doped ZnO nanoparticles (NPs) under visible light irradiation synthesized by using a sol-gel method. Structural, morphological, and basic optical properties of these samples were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) spectrum, and UV-Vis reflectance. Room temperature X-ray diffraction analysis revealed that Ag-doped TiO2 has both rutile and anatase phases, but TiO2 NPs only have the anatase phase. In both ZnO and Ag-doped ZnO NPs, the hexagonal wurtzite structure was observed. The morphologies of TiO2 and ZnO were influenced by doping with Ag, as shown from the SEM images. EDX confirms that the samples are composed of Zn, Ti, Ag, and O elements. UV-Vis reflectance results show decreased band gap energy of Ag-doped TiO2 and Ag-doped ZnO NPs in comparison to that of TiO2 and ZnO. Pathogenic bacteria, such as Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli, were used to assess the antibacterial activity of the synthesized materials. The reduction in the viability of all the three bacteria to zero using Ag-doped ZnO occurred at 60 μg/mL of culture, while Ag-doped TiO2 showed zero viability at 80 μg/mL. Doping of Ag on ZnO and TiO2 plays a vital role in the increased antibacterial activity performance.

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“…Approaches such as noble metal functionalization or creation of oxygen vacancies have been proposed to reduce sensor working temperatures [19][20][21][22]. Various types of metal oxide films have been used for gas sensing applications, [11,16,23] including TiO 2 [24], SnO 2 [25], and ZnO [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Thin Film Gas Sensors Based on Planetary Ball-Milled Zinc Oxide Nanoinks: Effect of Milling Parameters on Sensing Performance

et al. 2021

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Planetary ball-milled zinc oxide (ZnO) nanoparticle suspensions (nanoinks) were used to produce thin film chemiresistive gas sensors that operate at room temperature. By varying milling or grinding parameters (speed, time, and solvent) different thin film gas sensors with tunable particle sizes and porosity were fabricated and tested with dry air/oxygen against hydrogen, argon, and methane target species, in addition to relative humidity, under ambient light conditions. Grinding speeds of up to 1000 rpm produced particle sizes and RMS thin film roughness below 100 nm, as measured by atomic force and scanning electron microscopy. Raman spectroscopy, photoluminescence, and X-ray analysis confirmed the purity and structure of the resulting ZnO nanoparticles. Gas sensor response at room temperature was found to peak for nanoinks milled at 400 rpm and for 30 min in ethylene glycol and deionized water, which could be correlated to an increased film porosity and enhanced variation in electron concentration resulting from adsorption/desorption of oxygen ions on the surfaces of ZnO nanoparticles. Sensor response and dynamic behavior was found to improve as the temperature was increased, peaking between 100 and 150 °C. This work demonstrates the use of low-cost PBM nanoinks as the active materials for solution-processed thin film gas/humidity sensors for use in environmental, medical, food packaging, laboratory, and industrial applications.

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Ag Doped ZnO Nanowires as Highly Sensitive Ethanol Gas Sensor

Cited by 18 publications

References 7 publications

1D Metal Oxide Semiconductor Materials for Chemiresistive Gas Sensors: A Review

1D Metal Oxide Semiconductor Materials for Chemiresistive Gas Sensors: A Review

Antibacterial Activity of Ag-Doped TiO₂ and Ag-Doped ZnO Nanoparticles

Thin Film Gas Sensors Based on Planetary Ball-Milled Zinc Oxide Nanoinks: Effect of Milling Parameters on Sensing Performance

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Ag Doped ZnO Nanowires as Highly Sensitive Ethanol Gas Sensor

Cited by 18 publications

References 7 publications

1D Metal Oxide Semiconductor Materials for Chemiresistive Gas Sensors: A Review

1D Metal Oxide Semiconductor Materials for Chemiresistive Gas Sensors: A Review

Antibacterial Activity of Ag-Doped TiO2 and Ag-Doped ZnO Nanoparticles

Thin Film Gas Sensors Based on Planetary Ball-Milled Zinc Oxide Nanoinks: Effect of Milling Parameters on Sensing Performance

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Product

Resources

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Antibacterial Activity of Ag-Doped TiO₂ and Ag-Doped ZnO Nanoparticles