Ppb H2S gas sensing characteristics of Cu2O/CuO sub-microspheres at low-temperature

Meng, Fanning; Di, Xinpeng; Dong, Hongwei; Zhang, Yue; Zhu, Chunling; Li, Chunyan; Chen, Yujin

doi:10.1016/j.snb.2013.02.112

Cited by 111 publications

(35 citation statements)

References 35 publications

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“…Similarly, the H 2 S response of metal-oxide nanoparticles is mainly due to the high generation of charge carriers because of the adsorption of oxygen spices (that include O − and O 2− ) on the reactive surface sites of metal-oxide nanoparticles [28,29]. This adsorption can be explained as [30]: Consequently, the increase in the response of sensors when exposed to H 2 S gas may be allocated to the increase in free electrons according to Eqs.…”

Section: Resultsmentioning

confidence: 99%

Production of sensitive gas sensors using CuO/SnO2 nanoparticles

et al. 2019

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Metal oxide nanoparticles, such as CuO and SnO 2 , are outstanding systems for H 2 S gas sensing in air. In this work, those nanoparticles were deposited with different mixing percentages on substrates to form percolating networks of nanoparticles. Electrical electrodes were deposited on the nanoparticles' films to investigate their gas sensing response against H 2 and H 2 S, and their electrical characteristics. The sensor devices based on CuO-SnO 2 nanoparticles revealed enhanced sensing characteristics against H 2 S with a sensitivity of 10 ppm. The enhanced sensing characteristics could be attributed to the formation of PN-junctions among CuO and SnO 2 nanoparticles. The reasonable production cost (due to simple structure and cheap used materials), low power consumption (~ 1 µW for H 2 S at room temperature), high sensitivity, high response, and reasonable response time of the present sensors qualify them for practical implementation in portable gas sensing devices with enhanced characteristics.

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Section: Resultsmentioning

confidence: 99%

Production of sensitive gas sensors using CuO/SnO2 nanoparticles

et al. 2019

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“…In contrast, when the nanorods are exposed to H 2 S gas, the gas is adsorbed on the nanorod surface, and the following reactions occur [24].…”

Section: Resultsmentioning

confidence: 99%

Fabrication of a low-concentration H2S gas sensor using CuO nanorods decorated with Fe2O3 nanoparticles

et al. 2016

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“…Large efforts have been made to improve the sensor performance of metal oxides including the enhancement of sensor sensitivity, low detection limit, sensor life, response–recovery time, selectivity as well as lowering working temperature. A typical method used for these purposes is the surface modification of the semiconductor metal oxide with various dopants, mostly noble metals such as Au, Ag, Pt and Pd or different metal oxides . It is very appealing that room‐temperature gas‐sensing performance can also be realized through surface functionalization or hybridization of semiconductor materials with metal dopant, metal oxide nanoparticles or fabrication of heterojunction nanostructures .…”

Section: Materials For Gas Sensing21single‐element Materialsmentioning

confidence: 99%

Nanostructured Materials for Room‐Temperature Gas Sensors

et al. 2015

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Sensor technology has an important effect on many aspects in our society, and has gained much progress, propelled by the development of nanoscience and nanotechnology. Current research efforts are directed toward developing high-performance gas sensors with low operating temperature at low fabrication costs. A gas sensor working at room temperature is very appealing as it provides very low power consumption and does not require a heater for high-temperature operation, and hence simplifies the fabrication of sensor devices and reduces the operating cost. Nanostructured materials are at the core of the development of any room-temperature sensing platform. The most important advances with regard to fundamental research, sensing mechanisms, and application of nanostructured materials for room-temperature conductometric sensor devices are reviewed here. Particular emphasis is given to the relation between the nanostructure and sensor properties in an attempt to address structure-property correlations. Finally, some future research perspectives and new challenges that the field of room-temperature sensors will have to address are also discussed.

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Ppb H2S gas sensing characteristics of Cu2O/CuO sub-microspheres at low-temperature

Cited by 111 publications

References 35 publications

Production of sensitive gas sensors using CuO/SnO2 nanoparticles

Production of sensitive gas sensors using CuO/SnO2 nanoparticles

Fabrication of a low-concentration H2S gas sensor using CuO nanorods decorated with Fe2O3 nanoparticles

Nanostructured Materials for Room‐Temperature Gas Sensors

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