Growth of small sized CeO2 particles in the interlayers of expanded graphite for high-performance room temperature NOx gas sensors

Yang, Ying; Tian, Chungui; Sun, Lu; Lü, Renjiang; Zhou, Wei; Shi, Keying; Kan, Kan; Wang, Jingchao; Fu, Honggang

doi:10.1039/c3ta12399e

Cited by 96 publications

(42 citation statements)

References 52 publications

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“…With the increasing efforts devoted to the optimization of the sensing performances of graphene, some important factors are found to contribute to the graphene‐sensing properties, including the structure defects and dopants such oxygen‐containing groups, heteroatoms, organic groups, metal or metal oxide nanoparticles . Both experimental and theoretical studies have elucidated that the dangling bond defects at the edge of graphene nanoribbons have a stronger interaction with gas molecules.…”

Section: Materials For Gas Sensing21single‐element Materialsmentioning

confidence: 99%

“…Graphene/metal‐oxide nanocomposites are another group of robust sensing materials that can be operated at room temperature. Especially graphene oxide, with its large number of oxygen‐containing functional groups, has been a very successful platform for the synthesis of diverse composite nanomaterials.…”

Section: Materials For Gas Sensing21single‐element Materialsmentioning

confidence: 99%

“…Most of the sensors based on graphene/metal oxides nanocomposites are focused on NO x detection . Huang et al reported that zinc oxide quantum‐dot (5 nm)‐decorated graphene nanocomposites showed enhanced (by 4 times) formaldehyde‐sensing properties compared to pure graphene at room temperature.…”

Section: Materials For Gas Sensing21single‐element Materialsmentioning

confidence: 99%

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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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Section: Materials For Gas Sensing21single‐element Materialsmentioning

confidence: 99%

Section: Materials For Gas Sensing21single‐element Materialsmentioning

confidence: 99%

Section: Materials For Gas Sensing21single‐element Materialsmentioning

confidence: 99%

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Nanostructured Materials for Room‐Temperature Gas Sensors

et al. 2015

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“…When the oxidizing gas (e.g., NO x ) is injected, the reactions happen as follows

{NO}_{2} + {normale}^{-} \Rightarrow {NO}_{2}^{-} /NO + {normale}^{-} \Rightarrow {NO}^{-}

{NO}_{2} + {normalO}^{-} \Rightarrow {NO}_{3}^{-} /NO + {normalO}^{-} \Rightarrow {NO}_{normal2}^{-}

…”

Section: Resultsmentioning

confidence: 99%

Enhanced NO_x Gas Sensing Properties of Ordered Mesoporous WO₃/ZnO Prepared by Electroless Plating

Han

Wang

et al. 2017

Adv Materials Inter

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NO x gas, and the study on ZnO-based gas sensors attracted the researchers largely. Hitherto, the researchers have synthesized ZnO with different morphology, including nanorods, [9] nanosheets, [10] nanotubes, [11] nanoparticles, [12] nanoplates, [13] nanofilms, [14] and so forth. [15][16][17][18][19][20][21][22][23][24] The different morphology has the considerable impact on the gas sensing performance of MOS gas sensors. A large number of researches indicated that the doped-ZnO materials showed the better performance. The doping components mainly included SnO 2 , WO 3 , Cr 2 O 3 , Co 3 O 4 , Ni, noble metal, etc. [9][10][11][25][26][27][28][29][30][31][32][33][34] Renitta and Vijayalakshmi [30] fabricated a novel nanowhiskers array of Cr incorporated ZnO on ITO substrate by spray pyrolysis technique, and the material exhibited high sensing response to hydrogen gas at room temperature. Liu et al. [28] synthesized Co 3 O 4 /ZnO nanocomposites by an easy wet-chemistry route, and the obtained nanocomposite showed enhanced gas sensing response (about 46%) to 100 ppm ethanol at 170 °C. Tamaekong et al. [31] successfully produced ZnO nanoparticles doped with 0.2-2 at% Pt by flame spray pyrolysis technique. They found that the 0.2 at% Pt/ZnO sensing film showed the highest sensitivity (2.9%) and the fastest response time (≈10 s) to 1000 ppm CO at 350 °C.WO 3 -based gas sensors were widely studied recent years. Zeng et al. [35] prepared a porous WO 3 sensor by anodic oxidation of DC magnetron sputtered metallic tungsten (W) film on alumina substrate. The prepared WO 3 sensor achieved the maximum response toward NO 2 at a low operating temperature of 150 °C. You et al. [36] successfully synthesized the nanosheets assembled hierarchical WO 3 hollow microspheres by sintering acid-treated CaWO 4 hollow microspheres precursor at 500 °C, and the response to 40 ppb NO 2 was about 16 at 75 °C. Vuong et al. [37] studied the gas sensing mechanism of a 1D highly porous WO 3 nanowire gas sensor, which was based on adsorption-desorption kinetics of oxidizing gases. However, the gas sensing properties of WO 3 /ZnO composite were rarely reported. Tesfamichael et al. [32] prepared W-doped ZnO thin films by magnetron sputtering method. The response time of the W-doped ZnO thin film was 195 s toward 5 ppm NO 2 at 150 °C. Naik et al. [23] synthesized a kind of composite MOS sensor array based on tungsten oxide (WO 3 ) and zinc oxide (ZnO) using a simple mechanical mixing method. The highest response of the composite was 148 toward 800 ppb NO 2 at 300 °C.A kind of novel n-n combined ordered mesoporous WO 3 /ZnO (OM-WO 3 / ZnO) sensor are successfully fabricated in this study. A soft-template method is used to synthesize the ordered mesoporous ZnO matrix. Surfaces of the ZnO matrix are innovatively modified using silane coupling agent (mark as: OM-ZnO-Si), and then a layer of WO 3 film is assembled on the surfaces of the OM-ZnO-Si by chemical plating method for the first time, and the OM-WO 3 /ZnO material is obtained. The prepared OM-WO 3 ...

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“…I (D)/ I (G) values for all rGO–CeO 2 composites were larger than that of GO, indicating that the number of defects in the graphene layer increased during the reduction of GO [29–30]. Anchoring of CeO 2 on rGO also caused an intensity decrease and up-shifting of the G-band because of the electron transfer [9,16]. …”

Section: Resultsmentioning

confidence: 99%

In situ formation of reduced graphene oxide structures in ceria by combined sol–gel and solvothermal processing

Yang

Ofner

Lendl

et al. 2016

Beilstein J. Nanotechnol.

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Raman and IR investigations indicated the presence of reduced graphene oxide (rGO)-like residues on ceria nanoparticles after solvothermal treatment in ethanol. The appearance of such structures is closely related to cerium tert-butoxide as precursor and ethanol as solvothermal solvent. The rGO-like residues improve the catalytic CO oxidation activity. This was also confirmed by introduction of “external” graphene oxide during sol–gel processing, by which the rGO structures and the catalytic activity were enhanced.

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Growth of small sized CeO2 particles in the interlayers of expanded graphite for high-performance room temperature NOx gas sensors

Cited by 96 publications

References 52 publications

Nanostructured Materials for Room‐Temperature Gas Sensors

Nanostructured Materials for Room‐Temperature Gas Sensors

Enhanced NO_x Gas Sensing Properties of Ordered Mesoporous WO₃/ZnO Prepared by Electroless Plating

In situ formation of reduced graphene oxide structures in ceria by combined sol–gel and solvothermal processing

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Growth of small sized CeO2 particles in the interlayers of expanded graphite for high-performance room temperature NOx gas sensors

Cited by 96 publications

References 52 publications

Nanostructured Materials for Room‐Temperature Gas Sensors

Nanostructured Materials for Room‐Temperature Gas Sensors

Enhanced NOx Gas Sensing Properties of Ordered Mesoporous WO3/ZnO Prepared by Electroless Plating

In situ formation of reduced graphene oxide structures in ceria by combined sol–gel and solvothermal processing

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Enhanced NO_x Gas Sensing Properties of Ordered Mesoporous WO₃/ZnO Prepared by Electroless Plating