Novel approaches towards design of metal oxide based hetero-structures for room temperature gas sensor and its sensing mechanism: A recent progress

Paul, Rinku; Das, Biswajit; Ghosh, Ranajit

doi:10.1016/j.jallcom.2023.168943

Cited by 46 publications

(23 citation statements)

References 283 publications

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“…43–45 Due to its high electron quenching ability, Pd facilitates the most rectifying carrier transport in the interfaces through a Schottky junction. 46,47…”

Section: Introductionmentioning

confidence: 99%

“…[43][44][45] Due to its high electron quenching ability, Pd facilitates the most rectifying carrier transport in the interfaces through a Schottky junction. 46,47 In the current research work, we have synthesized Pd-Rb 2 -O@g-C 3 N 4 /TiO 2 catalysts by hydrothermal treatment. The cocatalyst (Pd/Rb 2 O) nanoparticles were loaded in situ on the g-C 3 N 4 /TiO 2 composite during hydrothermal treatment.…”

Section: Introductionmentioning

confidence: 99%

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Surface sensitization of g-C₃N₄/TiO₂via Pd/Rb₂O co-catalysts: accelerating water splitting reaction for green fuel production in the absence of organic sacrificial agents

et al. 2023

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“…43–45 Due to its high electron quenching ability, Pd facilitates the most rectifying carrier transport in the interfaces through a Schottky junction. 46,47…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Surface sensitization of g-C₃N₄/TiO₂via Pd/Rb₂O co-catalysts: accelerating water splitting reaction for green fuel production in the absence of organic sacrificial agents

et al. 2023

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“…6−9 Compared with most MOS-based sensors that must be driven at high temperatures, roomtemperature responsive conductive organic material-based sensors have the critical advantages of simple structure and easy integration. 10,11 Particularly, PANI has become the most attractive NH 3 -sensitive material due to its simple synthesis process, excellent electronic properties, and easy doping. 12,13 Xu et al designed a specially flexible transparent polyaniline (PANI) film with a biomimetic rose-microtome structure, demonstrating excellent sensitivity to NH 3 at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Cu-Loaded Polyaniline-Coated MoO₃ Nanowire Nanohybrids for High-Sensitivity NH₃ Sensing at Room Temperature

Li,

Liu

et al. 2023

ACS Appl. Nano Mater.

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The Cu-loaded polyaniline-coated MoO 3 nanowire ternary nanohybrids were successfully prepared by the solution heat method and in situ oxidation polymerization method for traces of ammonia (NH 3 ) detection at room temperature. The prepared ternary nanohybrids were placed on the fork finger electrode of the alumina substrate by a spin coating method. The gas sensitivity of the devices to NH 3 was evaluated by the static method at room temperature. The results showed that the sensor based on the Cu-3-PMN-20 ternary nanohybrid (doping 20 wt % MoO 3 nanowires and loaded 3 wt % nano Cu in PANI) exhibited the best sensitivity (17.11), which was 6 times higher than that of pure PANI (2.86) to 100 ppm (parts-per-million) NH 3 . Meanwhile, the sensor based on Cu-3-PMN-20 ternary hybrid also showed an excellent detection limit [20 ppb(parts-per-billion)], fast response−recovery time (41/ 179 s), outstanding selectivity, reliable stability, and acceptable moisture resistance. Therefore, the Cu-3-PMN-20 ternary hybrid was expected to be a strong competitor in the field of NH 3 sensing at room temperature.

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Section: ■ Introductionmentioning

confidence: 99%

“…Several attempts are being made to improve the sensing performance (in terms of detection limit, sensor selectivity, speed, and operating conditions) of resistive sensors by (i) engineering the receptor layer (doping and functionalization), , (ii) fabricating junctions, , and (iii) tuning and optimizing the device architecture. , Chen et al demonstrated fast and low-level NO 2 sensing by tuning the Schottky barrier height and the device bias for the Au/TiO 2 /Sn 3 O 4 junction system . A study conducted by Wang et al showcased the efficacy of a Pd-doped CoTiO 3 /TiO 2 p–n heterojunction device in detecting benzene by augmenting the catalytic activity of Pd.…”

Section: Introductionmentioning

confidence: 99%

Crystallographic Nanojunctions of Bismuth Ferrite for Unconventional Detection of Carbon Monoxide

Eshore,

Dey,

Goswami

et al. 2023

ACS Appl. Nano Mater.

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The present work reported, for the very first time, a crystallographic junction formed of ( 002) and ( 110) oriented crystals of bismuth ferrite (BFO) for ultrasensitive carbon monoxide (CO) detection. Growth orientation and crystallinity of the solution-processed BFO were controlled by varying calcination times. The sensor demonstrated a maximum response of six times for 30 ppm of CO, with response and recovery times of 149 and 226 s, respectively, with a significant specificity over other chemically compatible species. The device showed excellent stability when tested continuously for a period of 150 days with a maximum response deviation of ±0.35 times for 30 ppm of CO. The sensitivity of the sensor significantly increased in comparison to other polycrystalline variants with less or no junctions. In order to understand the effect of crystallographic junctions on sensing performance, an analytical model was put forward. The proposed model established the dependency of the sensor response pattern on the carrier diffusion coefficient (D g ) of the exposed gas and the ease of carrier diffusion through the gas−surface junction, which is controlled by the junction bias and the drift current. Hence, the proposed junction-based sensor provides additional control over the sensor efficiency in comparison to its resistive counterparts, thereby significantly improving the device performance without significantly complicating the device.

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Novel approaches towards design of metal oxide based hetero-structures for room temperature gas sensor and its sensing mechanism: A recent progress

Cited by 46 publications

References 283 publications

Surface sensitization of g-C₃N₄/TiO₂via Pd/Rb₂O co-catalysts: accelerating water splitting reaction for green fuel production in the absence of organic sacrificial agents

Surface sensitization of g-C₃N₄/TiO₂via Pd/Rb₂O co-catalysts: accelerating water splitting reaction for green fuel production in the absence of organic sacrificial agents

Cu-Loaded Polyaniline-Coated MoO₃ Nanowire Nanohybrids for High-Sensitivity NH₃ Sensing at Room Temperature

Crystallographic Nanojunctions of Bismuth Ferrite for Unconventional Detection of Carbon Monoxide

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Novel approaches towards design of metal oxide based hetero-structures for room temperature gas sensor and its sensing mechanism: A recent progress

Cited by 46 publications

References 283 publications

Surface sensitization of g-C3N4/TiO2via Pd/Rb2O co-catalysts: accelerating water splitting reaction for green fuel production in the absence of organic sacrificial agents

Surface sensitization of g-C3N4/TiO2via Pd/Rb2O co-catalysts: accelerating water splitting reaction for green fuel production in the absence of organic sacrificial agents

Cu-Loaded Polyaniline-Coated MoO3 Nanowire Nanohybrids for High-Sensitivity NH3 Sensing at Room Temperature

Crystallographic Nanojunctions of Bismuth Ferrite for Unconventional Detection of Carbon Monoxide

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Surface sensitization of g-C₃N₄/TiO₂via Pd/Rb₂O co-catalysts: accelerating water splitting reaction for green fuel production in the absence of organic sacrificial agents

Surface sensitization of g-C₃N₄/TiO₂via Pd/Rb₂O co-catalysts: accelerating water splitting reaction for green fuel production in the absence of organic sacrificial agents

Cu-Loaded Polyaniline-Coated MoO₃ Nanowire Nanohybrids for High-Sensitivity NH₃ Sensing at Room Temperature