WO3 nanomaterials synthesized via a sol-gel method and calcination for use as a CO gas sensor

Susanti, Diah; Diputra, A. A. Gede Pradnyana; Tananta, Lucky; Purwaningsih, Hariyati; Kusuma, George Endri; Wang, Chenhao; Shih, Shao‐Ju; Huang, Ying‐Sheng

doi:10.1007/s11705-014-1431-0

Cited by 36 publications

(13 citation statements)

References 24 publications

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“…5,6 Moreover, it exhibits a wide band gap ranging from 2.7 to 3.6 eV, 7 and this oxide is rather complex and can crystallize in a number of different phases and crystals. 1,8,9 In the literature, numerous reports are available on the growth of WO 3 nanostructures in the form of nanoparticles, 10 thin films, 11 nanorods, 12 and nanowires. 13 To grow these nanostructures, hydrothermal reaction, 14 sol–gel chemistry, 15 thermal oxidation, 16 pulsed laser deposition, 17 and thermal evaporation are most commonly used.…”

Section: Introductionmentioning

confidence: 99%

Integration of VLS-Grown WO₃ Nanowires into Sensing Devices for the Detection of H₂S and O₃

et al. 2019

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The inspiration behind this research is the development of tungsten oxide (WO3) nanowires based, highly sensitive and selective sensing devices directly on the active sensing platform. WO3 one-dimensional nanowires were synthesized via the vapour-phase growth technique. This approach allows the production of well-aligned and uniform nanowires on alumina substrates with their diameter and length in the nanometer range. The morphological and structural properties of nanowires have been investigated by means of the field effect electron microscopy, grazing incidence X-ray diffraction, Raman spectroscopy, and X-ray photoelectron spectroscopy. Finally, the fabricated WO3 nanowire sensing devices and their gas sensing performance were investigated in the presence of different oxidizing and reducing gases (especially environmental gases) at different temperatures. The WO3 sensors demonstrate high performance toward H2S and O3 at the optimal working temperatures of 400 and 200 °C, respectively, with the detection limit in the ppb level.

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Section: Introductionmentioning

confidence: 99%

Integration of VLS-Grown WO₃ Nanowires into Sensing Devices for the Detection of H₂S and O₃

et al. 2019

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“…Therefore at low operating temperature, the sensitivity of the sensor was also low. However at higher temperature, more oxygen and CO would be adsorbed onto ZnO surface and react to become CO 2 gas, leading to the increase in sensor resistance and sensitivity (Susanti et al, 2014a).…”

Section: Resultsmentioning

confidence: 99%

Preparation of CO Gas Sensor from ZnO Material Synthesized via Thermo-Oxidation Process

Susanti¹,

Lutfiana²,

Nurdiansah³

et al. 2015

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Carbon monoxide (CO) is poisonous to human because of its nature which is capable to bind to the haemoglobin in blood stronger than oxygen, so that causing toxication and even death. Therefore a sensor to early detect the presence of CO gas is necessary. ZnO is one of semiconductor materials which widely applied as a sensor material. However, ZnO is rarely reported as a CO gas sensor material. In this study, ZnO as a sensor material has been synthesized by thermo-oxidation of Zn powder at oxidation temperature variations of 800, 850 and 900 ºC. The synthesized ZnO was crushed and compacted to form pellet for sensor chip. The ZnO pellets were then sintered at 500 ºC. The material structures were examined using Scanning Electron Microscope (SEM), X-Ray Diffractometer (XRD), and Brunauer-Emmet-Teller (BET) analysis. The sensitivity test towards CO gas was conducted with the variations in sensing operating temperatures of 30, 50, 100 ºC and variation of CO gas input concentration of 10 ppm, 50 ppm, 100 ppm, 250 ppm, and 500 ppm. The sensitivity test results showed that the sensitivity towards CO gas decreased as the oxidation temperature increased. In addition the sensitivity increased along with the increasing of the sensing operating temperature and CO gas input concentration. Hence, the highest sensitivity value was obtained from ZnO material synthesized at 800 ºC due to the highest active surface area of 69.4 m 2 g -1 with CO concentration of 500 ppm and sensor operating temperature of 100 ºC.

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“…WO 3 nanomaterials were synthesized via a sol-gel method and calcination for use as a CO gas sensor. The sensitivity of WO 3 sensor ships was determined by comparing the changes in electrical resistance in the absence and presence of 50 ppm of CO gas at 200 C [91]. Nanocrystalline WO 3 films prepared by gas evaporation show enhanced gas-sensing properties; when doped with Al or Au, 5 ppm of H 2 S yielded a conductance increase by~250 times even at room temperature [92].…”

Section: Wo 3 Nanocompositesmentioning

confidence: 99%

Nanotechnology for Energy Storage

et al. 2016

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Nanomaterials of metal oxides have been intensively studied as anode and cathode materials for lithium-ion batteries (LiBs) aimed at achieving higher specific capacities and high power density. It is worth pointing out that the word "nanotechnology" has become very popular and is used to describe many types of research where the characteristic dimensions are much less than 1 μm. For example, continued improvements in lithography to design computer components have resulted in line widths that are less than one micron: this work is often called "nanotechnology." Many of the exponentially improving trends in computer hardware capability have remained steady for the last 50 years. Today "nanosciences" are fairly widespread with the belief that these trends are likely to continue for at least several years; however, new aspects are now considered in the field of energy transformation. In this respect, the classic 1959 article "There's plenty of room at the bottom" by Richard P. Feynman discusses the limits of miniaturization and forecast the ability to ". . .arrange the atoms the way we want; the very atoms, all the way down!" [1]. Nano-structured materials are distinguished from conventional polycrystalline materials by the size of the structural entities that comprises them, microstructures comprising nanoscale domains in at least one dimension. The ability to control a material's structure and composition at the nano-level has demonstrated that materials and devices having properties intrinsically different from their polycrystalline counterparts can be fabricated. As tailoring of fundamental properties becomes possible at the atomic level, the prospect of developing novel materials and devices with new applications become viable.Conventional rechargeable Li batteries exhibit rather poor rate performance, even compared with old technologies such as lead-acid [2]. Achieving high rate rechargeable Li-ion batteries depends ultimately of the dimension of the active particles for both negative and positive electrodes. One of the prospective solutions for the preparation of electrodes with high power density is the choice of

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WO3 nanomaterials synthesized via a sol-gel method and calcination for use as a CO gas sensor

Cited by 36 publications

References 24 publications

Integration of VLS-Grown WO₃ Nanowires into Sensing Devices for the Detection of H₂S and O₃

Integration of VLS-Grown WO₃ Nanowires into Sensing Devices for the Detection of H₂S and O₃

Preparation of CO Gas Sensor from ZnO Material Synthesized via Thermo-Oxidation Process

Nanotechnology for Energy Storage

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WO3 nanomaterials synthesized via a sol-gel method and calcination for use as a CO gas sensor

Cited by 36 publications

References 24 publications

Integration of VLS-Grown WO3 Nanowires into Sensing Devices for the Detection of H2S and O3

Integration of VLS-Grown WO3 Nanowires into Sensing Devices for the Detection of H2S and O3

Preparation of CO Gas Sensor from ZnO Material Synthesized via Thermo-Oxidation Process

Nanotechnology for Energy Storage

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Product

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About

Integration of VLS-Grown WO₃ Nanowires into Sensing Devices for the Detection of H₂S and O₃

Integration of VLS-Grown WO₃ Nanowires into Sensing Devices for the Detection of H₂S and O₃