Selectivity of Ti-doped In2O3 ceramics as an ammonia sensor

Guo, Peijun; Pan, Haibo

doi:10.1016/j.snb.2005.07.040

Cited by 90 publications

(30 citation statements)

References 15 publications

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“…Theses bubbles are produced by irradiation of elevated intensity ultrasound in the liquid reaction beside with alternation of compressive and expansive acoustic waves [22,23]. The combined chemical and mechanical effects are generated during the reaction due the microscopic bubbles [24]. These bubbles collapsed during the sonochemical process due to the high temperature and pressures.…”

Section: Mechanism For the Sonochemical Formation Of Sno 2 Nanoparticlesmentioning

confidence: 99%

“…The other reason could be the SnO 2 surface, which is vulnerable to interact with hydrogen. The working principal of the oxide-based sensor is to change the conductance with the interface of the analyte gas [24][25][26][27][28][29][30]. This effect demonstrated that higher surface area offers better adsorption locations for the exterior reaction.…”

Section: Electrical and Hydrogen Sensing Properties Of Sno 2 Nanopartmentioning

confidence: 99%

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Sonochemical-driven ultrafast facile synthesis of SnO2 nanoparticles: Growth mechanism structural electrical and hydrogen gas sensing properties

Ullah

Khan

Yamani

et al. 2017

Ultrasonics Sonochemistry

125

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Synthesis of SnO nanoparticles have been successfully accomplished moderately at lower temperature by facile, rapid, efficient and mild ultrasonic irradiation method. The as-grown SnO nanoparticles are investigated by various characterization techniques in terms of structural, optical, electrical and gas sensing properties. XRD investigation has shown that the SnO nanoparticles materials exhibit single rutile crystal phase with high crystallinity. FESEM studies showed uniform and monodisperse morphology of SnO nanoparticles. The chemical composition of SnO was systematically studied by EDX measurements. Additional confirmation of three Raman shifts (432, 630, 772cm) indicated the characteristic properties of the rutile phase of the as-grown SnO nanoparticles. The optical properties of SnO nanoparticles were examined by DRS, and the electronic band gap of SnO nanoparticles were around 3.6eV. Electrical properties of the SnO nanoparticles measured at various temperatures have shown the semiconducting properties. Surface area and pore size of synthesized nanoparticles were analyzed from BET. It has been revealed that SnO nanoparticles have surface area is 47.8574m/g and the pore size is 10.5nm. Moreover, hydrogen gas sensor made of SnO nanoparticles showed good sensitivity and faster response for the hydrogen gas. This method is template-less and surfactant-free which circumvents rigorous reaction work-up for the former removal, reaction temperature and reaction time compared to hydrothermal synthesis and pertinent to many other oxide materials.

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Section: Mechanism For the Sonochemical Formation Of Sno 2 Nanoparticlesmentioning

confidence: 99%

Section: Electrical and Hydrogen Sensing Properties Of Sno 2 Nanopartmentioning

confidence: 99%

Sonochemical-driven ultrafast facile synthesis of SnO2 nanoparticles: Growth mechanism structural electrical and hydrogen gas sensing properties

Ullah

Khan

Yamani

et al. 2017

Ultrasonics Sonochemistry

125

View full text Add to dashboard Cite

show abstract

“…The sensor structure and the testing principle were similar to that reported previously [10,11,21]. The electrode for measurement was composed of a pair of four-fingered gold electrodes of 120 m width and 40 m spacing between fingers on an alumina substrate.…”

Section: Gas-sensing Property Measurementsmentioning

confidence: 99%

Nanoplates of α-SnWO4 and SnW3O9 prepared via a facile hydrothermal method and their gas-sensing property

Dong

Ding

et al. 2009

Sensors and Actuators B: Chemical

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“…When the sensor material is exposed to vapors of ammonia, the superficial reactions of NH 3 molecules with the oxygen species caused more electrons to return to the conduction band because ammonia acting as the electron donor. The surface reactions between the NH 3 and the sensor material can be described as follows [18][19][20][21] where O − (ads), NO 2 − (ads), and NO 3 − (ads) represent negatively charged chemisorbed species, and e − free electrons available for electrical conduction. The relations means that when the sensor is exposed to NH 3 containing gas, electrons trapped by the adsorptive states will be released, leading to a decrease in sensor resistance, as experimentally observed (Fig.…”

Section: Resultsmentioning

confidence: 99%