Temperature dependent H2S and Cl2 sensing selectivity of Cr2O3 thin films

Balouria, Vishal; Kumar, Arvind; Singh, Ajay; Samanta, Soumen; Debnath, A.K.; Mahajan, Aman; Bedi, R. K.; Aswal, D. K.; Gupta, S. K.; Yakhmi, J. V.

doi:10.1016/j.snb.2011.05.002

Cited by 53 publications

(33 citation statements)

References 25 publications

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“…The former is due to the high response amplitude, which requires more time to fully recover its baseline value once gas exposure is switched off. 57 The latter arises from surface charge accumulation due to adsorbed molecules, which inhibits adsorption of further gaseous species. 58 From a functional point of view it is worth noting that, tuning the iron content, the response to 1 ppm of NO 2 is at least comparable with the response obtained by Siemons and co-workers, 50 who searched for the optimization of LnFeO 3 perovskites by screening the Ln cation within the lanthanide series.…”

Section: Chemistry Of Materialsmentioning

confidence: 99%

Chemical Tuning versus Microstructure Features in Solid-State Gas Sensors: LaFe_1-xGa_xO₃, a Case Study

et al. 2014

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A simple and cheap wet chemical approach is exploited to synthesize\ud LaFe1‑xGaxO3 (x = 0−1) crystalline perovskites. Ga doping level deeply influences not only\ud the microstructure, but also the iron chemical features and consequently the responses to\ud external chemicals. Sensitivity toward gases (NO2, CO, and ethanol), in fact, is driven by both\ud Fe/Ga ratio and iron oxidation states, which are demonstrated playing a role much stronger\ud than morphological parameters, such as grain size and specific surface area, usually dominating\ud the performances of metal oxide based gas sensors. Results highlight that sensing behavior is\ud tunable within a large extent by a simple and effective modulation of the chemical composition,\ud obtaining sensitivities comparable with state of the art perovskite based gas sensors

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Section: Chemistry Of Materialsmentioning

confidence: 99%

Chemical Tuning versus Microstructure Features in Solid-State Gas Sensors: LaFe_1-xGa_xO₃, a Case Study

et al. 2014

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“…However these sensors are severely limited in practical applications due to higher operating temperature, low cross selectivity, limited range of detection, longer response and recovery times. [20][21][22][23][24] These facts necessitate the development of highly sensitive and selective room temperature hydrogen sulfide sensor.…”

Section: Introductionmentioning

confidence: 99%

Selective recognition of hydrogen sulfide using template and catalyst free grown ZnO nanorods

Mani

Rayappan

2015

RSC Adv.

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Hydrogen sulfide is one of the important endogenous signaling molecules which can play a key role in regulating blood pressure, cardiovascular and age-associated diseases. But it is extremely toxic if inhaled externally and even can cause death at higher concentrations. This work reports a systematic investigation of template and catalyst free grown ZnO nanorods through simple chemical spray pyrolysis technique and their room temperature hydrogen sulfide sensing characteristics such as sensitivity, selectivity, stability, response and recovery times. The structural, morphological, optical and electrical properties of ZnO nanostructures were investigated using X-ray diffractometer (XRD), field emission scanning electron microscope (FE-SEM), UV-vis spectrophotometer and electrometer respectively. The role of density of nanorods formed on the glass substrates through spray cycle modulation has been used as an effective tool for achieving better sensing response. ZnO nanorods with the diameter ranging from 200 -250 nm exhibited high selectivity towards hydrogen sulfide and the mechanism has been reported. The challenge of selectivity has also been solved efficiently through ZnO nanorods.

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“…Tungsten oxide and chromium oxide have stimulated great interest because of their excellent performance in many fields, including environmental purification [1,2], dye-sensitized solar cells [3] and gas sensor [4,5]. Given this background, considerable researches were also addressed to their compound materials, including WO 3 /Cr 2 O 3 [6,7] and chromium tungstate [8].…”

Section: Introductionmentioning

confidence: 99%

Cr2WO6 nanoparticles prepared by hydrothermal assisted method with selective adsorption properties for methylene blue in water

Zhou

Huang

et al. 2015

Materials Science in Semiconductor Processing

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Temperature dependent H2S and Cl2 sensing selectivity of Cr2O3 thin films

Cited by 53 publications

References 25 publications

Chemical Tuning versus Microstructure Features in Solid-State Gas Sensors: LaFe_1-xGa_xO₃, a Case Study

Chemical Tuning versus Microstructure Features in Solid-State Gas Sensors: LaFe_1-xGa_xO₃, a Case Study

Selective recognition of hydrogen sulfide using template and catalyst free grown ZnO nanorods

Cr2WO6 nanoparticles prepared by hydrothermal assisted method with selective adsorption properties for methylene blue in water

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Temperature dependent H2S and Cl2 sensing selectivity of Cr2O3 thin films

Cited by 53 publications

References 25 publications

Chemical Tuning versus Microstructure Features in Solid-State Gas Sensors: LaFe1-xGaxO3, a Case Study

Chemical Tuning versus Microstructure Features in Solid-State Gas Sensors: LaFe1-xGaxO3, a Case Study

Selective recognition of hydrogen sulfide using template and catalyst free grown ZnO nanorods

Cr2WO6 nanoparticles prepared by hydrothermal assisted method with selective adsorption properties for methylene blue in water

Contact Info

Product

Resources

About

Chemical Tuning versus Microstructure Features in Solid-State Gas Sensors: LaFe_1-xGa_xO₃, a Case Study

Chemical Tuning versus Microstructure Features in Solid-State Gas Sensors: LaFe_1-xGa_xO₃, a Case Study