A review of nanostructure-based gas sensors in a power consumption perspective

Yun, Jeonghun; Cho, Minkyu; Lee, Kichul; Kang, Mingu; Park, Inkyu

doi:10.1016/j.snb.2022.132612

Cited by 26 publications

(16 citation statements)

References 74 publications

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“…The sensor response at room temperature was marginal, but the increase in temperature to 125 and 135 °C led to a proportional improvement (Figure a,b), which started to decline with the further increase in temperature. This initial improvement may be due to the ability of the metal oxide sensor to alter the expression of oxidative species and the density of the same from one temperature to another. , At a very high temperature, the response starts to decline, which may be due to the limitation of the analyte in interacting with the electrode or mismatch in the oxidative temperature, or even the existence of the oxygen species that may get reduced. , A similar sensitivity at low temperature has been noted before for the oxide sensor. , Among the electrodes, Fe/Pt-doped SnO 2 showed the maximum response followed by Fe/W-doped SnO 2 . In contrast, a relatively poor response was exhibited for SnO 2 with no difference in the whole working temperature range.…”

Section: Resultssupporting

confidence: 58%

Handheld Crop Pest Sensor Using Binary Catalyst-Loaded Nano-SnO₂ Particles for Oxidative Signal Amplification

Kumar,

Chandel,

Kataria

et al. 2023

ACS Sens.

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In agriculture, pest management is a major challenge. Crop releases volatiles in response to the pest; hence, sensing these volatile signals at a very early stage will ease pest management. Here, binary catalyst-loaded SnO 2 nanoparticles of <5 nm were synthesized for the repeated capture and oxidation of the signature volatile and its products to amplify the chemoresistive signal to detect concentrations as low as ≈120 ppb. The sensitivity may be due to the presence of the elements in the Sn−Fe−Pt bond evidenced by extended X-ray absorption fine-structure spectroscopy (EXAFS) that captures and oxidize the volatile without escaping. This strong catalyst may oxidize nontarget volatiles and can cause false signals; hence, a molecular sieve filter has been coupled to ensure high selectivity for the detection of Tuta absolutainfestation in tomato. Finally, with the support of a mobile power bank, the optimized sensor has been assembled into a lightweight handheld device.

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Section: Resultssupporting

confidence: 58%

Handheld Crop Pest Sensor Using Binary Catalyst-Loaded Nano-SnO₂ Particles for Oxidative Signal Amplification

Kumar,

Chandel,

Kataria

et al. 2023

ACS Sens.

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“…Among reported gas detection techniques such as resistance-based, optical, [7] electrochemical sensor, [8] surface plasmon resonance, [9] surface acoustic, [10] etc., resistance-based gas sensor is a highly favorable option due to the advantages of low cost, easy operation and portability. [11][12][13] Up to now, various metal oxide semiconductors have been synthesized for TEA detection. In particular, ZnO is a n-type oxide semiconductor, which is very promising in fabricating gas sensors because of its low toxicity, easy synthesis, excellent chemical and thermal stability.…”

Section: Introductionmentioning

confidence: 99%

Anchoring Pt Particles onto Mesoporousized ZnO Holey Cubes for Triethylamine Detection with Multifaceted Superiorities

Dong

Tian

et al. 2023

Small

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Designing sensing materials with integrating unique spatial structures, functional units, and surface activity is vital to achieve high‐performance gas sensor toward triethylamine (TEA) detection. Herein, a simple spontaneous dissolution is used with subsequent thermal decomposition strategy to fabricate mesoporousized ZnO holey cubes. The squaric acid is crucial to coordinate Zn2+ to form a cubic shape (ZnO‐0) and then tailor the inner part to open a holey cube with simultaneously mesoporousizing the left cubic body (ZnO‐72). To enhance the sensing performance, the mesoporous ZnO holey cubes have been functionalized with catalytic Pt nanoparticles, which deliver superior performances including high response, low detection limit, and fast response and recovery time. Notably, the response of Pt/ZnO‐72 towards 200 ppm TEA is up to 535, which is much higher than those of 43 and 224 for pristine ZnO‐0 and ZnO‐72. A synergistic mechanism combining the intrinsic merits of ZnO, its unique mesoporous holey cubic structure, the oxygen vacancies, and the catalytic sensitization effect of Pt has been proposed for the significant enhancement in TEA sensing. Our work provides an effective facile approach to fabricate an advanced micro‐nano architecture with manipulating its spatial structure, functional units, and active mesoporous surface for promising TEA gas sensors.

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“…As industrialization has grown in recent years, the amount of polluting gases in the air have increased, which are particularly harmful to the environment and public health. − Therefore, it makes sense to remove and capture these toxic gases from the environment using effective methods. In order to identify such air pollutants, highly sensitive sensors with high selectivity, fast response, and recovery of sorbents to toxic substances are urgently needed. − Due to their high surface-to-volume ratio, − two-dimensional (2D) nanomaterials have gained significant interest from researchers in recent years as efficient gas sensors. The discovery of graphene led to studies on the sensing potential of 2D nanostructures.…”

Section: Introductionmentioning

confidence: 99%

Adsorption and Gas-Sensing Performance of the Small-Molecule Gas on ZrSe₂ Monolayers: A First-Principles Study

et al. 2023

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The adsorption of five small gas molecules (CO, CO 2 , NO, NO 2 , and NH 3 ) on transition metal (TM)-modified ZrSe 2 monolayers (Au-ZrSe 2 and Pt-ZrSe 2 ) are studied based on first principles. The adsorption structure, adsorption energy (E ads ), electron transfer (Q t ), and density of states (DOS) with intrinsic ZrSe 2 , Au-ZrSe 2 , and Pt-ZrSe 2 monolayers are discussed, and their sensing performance is evaluated. The results show that the electrical conductivity of ZrSe 2 is obviously increased after Au and Pt atom modification. The intrinsic ZrSe 2 adsorbs the five kinds of gas molecules weakly, while ZrSe 2 modified by the Au or Pt atom improves the adsorption of the gas molecules in different degrees. Au-ZrSe 2 has the best adsorption effect on NO 2 gas molecules, while Pt-ZrSe 2 shows strong sensitivity to CO gas molecules. Moreover, Au-ZrSe 2 and Pt-ZrSe 2 are of great significance for the adsorption sensing mechanism and also offer prospective materials for the advancement of gas-sensitive sensors.

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A review of nanostructure-based gas sensors in a power consumption perspective

Cited by 26 publications

References 74 publications

Handheld Crop Pest Sensor Using Binary Catalyst-Loaded Nano-SnO₂ Particles for Oxidative Signal Amplification

Handheld Crop Pest Sensor Using Binary Catalyst-Loaded Nano-SnO₂ Particles for Oxidative Signal Amplification

Anchoring Pt Particles onto Mesoporousized ZnO Holey Cubes for Triethylamine Detection with Multifaceted Superiorities

Adsorption and Gas-Sensing Performance of the Small-Molecule Gas on ZrSe₂ Monolayers: A First-Principles Study

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A review of nanostructure-based gas sensors in a power consumption perspective

Cited by 26 publications

References 74 publications

Handheld Crop Pest Sensor Using Binary Catalyst-Loaded Nano-SnO2 Particles for Oxidative Signal Amplification

Handheld Crop Pest Sensor Using Binary Catalyst-Loaded Nano-SnO2 Particles for Oxidative Signal Amplification

Anchoring Pt Particles onto Mesoporousized ZnO Holey Cubes for Triethylamine Detection with Multifaceted Superiorities

Adsorption and Gas-Sensing Performance of the Small-Molecule Gas on ZrSe2 Monolayers: A First-Principles Study

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Handheld Crop Pest Sensor Using Binary Catalyst-Loaded Nano-SnO₂ Particles for Oxidative Signal Amplification

Handheld Crop Pest Sensor Using Binary Catalyst-Loaded Nano-SnO₂ Particles for Oxidative Signal Amplification

Adsorption and Gas-Sensing Performance of the Small-Molecule Gas on ZrSe₂ Monolayers: A First-Principles Study