Chemical route to synthesis of mesoporous ZnO thin films and their liquefied petroleum gas sensor performance

Dhawale, Dattatray S.; Lokhande, C.D.

doi:10.1016/j.jallcom.2011.08.046

Cited by 27 publications

(13 citation statements)

References 32 publications

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“…ZnO has been one of the most investigated material for gas sensing by using conductometric sensors, i.e., devices whose response is related to the resistance variation of the sensitive element upon exposure to target gases [1]. In the pristine form, ZnO is an n-type semiconducting metal oxide with a wide direct band gap (~3.3 eV), high exciton binding energy (60 meV), excellent chemical and thermal stability, and a low price [2,3]. Nanosized ZnO due to fascinating properties imprinted by the small dimension is used in the transparent electrodes [4], solar cells [5], transducers [6], optoelectronic devices [7], UV sensors [8], and gas sensors [9,10].…”

Section: Introductionmentioning

confidence: 99%

“…Nanosized ZnO due to fascinating properties imprinted by the small dimension is used in the transparent electrodes [4], solar cells [5], transducers [6], optoelectronic devices [7], UV sensors [8], and gas sensors [9,10]. Regarding gas sensing application, nanostructured ZnO materials have been reported for detection of both oxidative and reducing gases such as various VOCs [11][12][13][14][15], LPG [2], acetylene [16], NO 2 [17], ammonia [18], and H 2 [19] with good performance. ZnO-based sensors are often preferred to other metal oxide-based conductive sensors to detect gaseous species due to their particular features such as high sensitivity, ease of fabrication, and very low cost [20].…”

Section: Introductionmentioning

confidence: 99%

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Hydrogen Sensing Properties of Co-Doped ZnO Nanoparticles

et al. 2018

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In this study, the gas sensing properties of Co-doped ZnO nanoparticles (Co-ZnO NPs) synthesized via a simple sol-gel method are reported. The microstructure and morphology of the synthesized Co-ZnO NPs were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM), respectively. Co-ZnO NPs were then used for developing a conductometric gas sensor for the detection, at mild temperature, of low concentration of hydrogen (H2) in air. To evaluate the selectivity of the sensor, the sensing behavior toward some VOCs such as ethanol and acetone, which represent the most important interferents for breath hydrogen analysis, was also investigated in detail. Results reported demonstrated better selectivity toward hydrogen of the Co-ZnO NPs sensor when compared to pure ZnO. The main factors contributing to this behavior, i.e., the transition from n-type behavior of pristine ZnO to p-type behavior upon Co-doping, the modification of oxygen vacancies and acid-base characteristics have been considered. Hence, this study highlights the importance of Co doping of ZnO to realize a high performance breath hydrogen sensor.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hydrogen Sensing Properties of Co-Doped ZnO Nanoparticles

et al. 2018

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“…Recently, liquefied petroleum gas (LPG) sensing properties of various ZnO microstructures such as flakes [26], flowers [27], rods [28,29], leafs [30], needles [31], have been reported. However the effect of ZnO morphology on LPG sensing properties has been scarcely reported [32].…”

Section: Introductionmentioning

confidence: 99%

Morphology evolution of ZnO thin films from aqueous solutions and their application to liquefied petroleum gas (LPG) sensor

Gurav

Patil

Shin

et al. 2012

Journal of Alloys and Compounds

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“…The large band gap of ZnO allows effectively absorbing of ultraviolet light, making it a promising material for UV detectors and filters. Also due to its high radiation, chemical, and thermal stability [2], ZnO is widely used for gas sensing, light-emitting diodes, varistors, etc [3]. ZnO is also a promising material for the antireflective, conductive and window layers of large area solar cells based on absorbing layers of Si, CdTe, CIGS or CZTSe [4].…”

Section: Introductionmentioning

confidence: 99%

Growth Time Effect on the Structural and Sub-Structural Properties of Chemically-Deposited ZnO Films

Berestok

Kurbatov

Opanasyuk

et al. 2015

AMR

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Abstract. Nanostructured ZnO films are obtained by chemical bath deposition from zinc nitrate, hexamethylenetetramine and ammonia. The evolution of the structural and sub-structural properties of the films is characterized using high resolution scanning electron microscopy (SEM) and X-ray diffraction analysis. In particular, we detail here the influence of condensation time on the crystal phase, texture quality, lattice constants, grain size, coherent scattering domain size (CSD), microstrain, stress and concentration of dislocations. Obtained condensates have the wurtzite structure with lattice parameters in the range a = 0.3248-0.3254 nm and c = 0.5206-0.5214 nm, depending on the condensation time. The grain size and microstrain in the direction perpendicular to the crystallographic planes (002) are in the range L ~ 26-42 nm and ε ~ (0.59-3.09)⋅10 -3 , respectively. Furthermore, the effects of deposition time on microstrain, stress and concentration of dislocations in the layers is established. By adjusting the condensation time, we are able to produce ZnO films with controlled structural properties: from nanorods to continuous nanostructured films.

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Chemical route to synthesis of mesoporous ZnO thin films and their liquefied petroleum gas sensor performance

Cited by 27 publications

References 32 publications

Hydrogen Sensing Properties of Co-Doped ZnO Nanoparticles

Hydrogen Sensing Properties of Co-Doped ZnO Nanoparticles

Morphology evolution of ZnO thin films from aqueous solutions and their application to liquefied petroleum gas (LPG) sensor

Growth Time Effect on the Structural and Sub-Structural Properties of Chemically-Deposited ZnO Films

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