Extremely sensitive and accurate H2S sensor at room temperature fabricated with In-doped Co3O4 porous nanosheets

Wu, Jie; Yang, Ying; Zhang, Chengxin; Yu, Hui; Huang, Licheng; Dong, Xiangting; Wang, Jinxian; Wang, Xinlu

doi:10.1039/c9dt01043b

Cited by 32 publications

(6 citation statements)

References 54 publications

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“…Although toluene and formaldehyde have smaller bond energies, the favorable chemical interaction of H 2 S with the surface adsorbed oxygen species due to its strong reducing capability 50,51 contributes to the H 2 S selectivity of our sensor. Furthermore, all M-SnO 2 sensors show good long-term stability as evidenced by H 2 S detection with a minor uctuation aer 30 days (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Given that the gas-sensing reaction requires the activation energy for gas adsorption and chemical bond breaking, H 2 S has the smallest bond energy of H–SH compared with the interfering gas molecules (CH 4 , CO, and H 2 , Table S3†). Although toluene and formaldehyde have smaller bond energies, the favorable chemical interaction of H 2 S with the surface adsorbed oxygen species due to its strong reducing capability 50,51 contributes to the H 2 S selectivity of our sensor. Furthermore, all M–SnO 2 sensors show good long-term stability as evidenced by H 2 S detection with a minor fluctuation after 30 days (Fig.…”

Section: Resultsmentioning

confidence: 99%

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Solution-processed metal doping of sub-3 nm SnO₂ quantum wires for enhanced H₂S sensing at low temperature

et al. 2022

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Solution-processed metal doping of sub-3 nm SnO₂ quantum wires for enhanced H₂S sensing at low temperature

et al. 2022

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“…In addition, the n-type doping effect is helpful for improving the conductivity. Noting that the gas-sensing reaction requires the activation energy for gas adsorption and chemical bond breaking, H 2 S should have the smaller bond energy of H-SH and the stronger reducing capability [49,50] compared with the interfering gas molecules. The favorable chemical interaction with the surface adsorbed oxygen species contributes to the H 2 S selectivity.…”

Section: Resultsmentioning

confidence: 99%

Metastable Antimony‐Doped SnO₂ Quantum Wires for Ultrasensitive Gas Sensors

Song

Liu

et al. 2021

Adv Elect Materials

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Doping is fundamental to controlling the properties of bulk semiconductors. Although the antimony (SbV)‐doping strategy is widely employed in the design of practical tin oxide (SnO2) semiconductor gas sensors for higher signal‐to‐noise ratio, challenges remain to dope semiconductor nanocrystals since the diffusion of impurity atoms may be far from realized at the synthesis temperatures used. Herein, a metastable Sb‐doping strategy is proposed to overcome the serious receptor‐versus‐transducer mismatch in SnO2 quantum wires (QWs). The solvothermal synthesis of colloidal SbIII‐doped SnO2 QWs has been conducted at 180 °C, whereby the antimony amount is varied to optimize the structural and morphological properties for higher surface activity and electrical conductivity. A unique n‐type doping mechanism arising from the stable presence of SbIII on SnO2 (101) facets via SnII‐O‐SbIII is demonstrated. Further, the use of sensitive (down to 4 ppb, the lowest detection limit ever reported), fast (response and recovery time of 43 s and 96 s toward 10 ppm of H2S) gas sensors for H2S detection at near room temperature (40 °C) is showcased. The metastable Sb‐doping strategy may pave the way to ultrasensitive gas sensor possessing low power consumption and excellent integration compatibility to satisfy the increasing demand for ubiquitous and reliable gas detection.

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“…H 2 S is a colorless noxious gas that is released from sewage sludge, sulfur-containing organic matter decomposition, and microbial sulfate reduction [173]. Although H 2 S emits a pungent odor reminiscent of "rotten eggs", humans are unable to detect the dangerous concentration of H 2 S in time due to the factory hyposensitization.…”

Section: Hydrogen Sulfide (H 2 S) Gas Detectionmentioning

confidence: 99%

Heterojunctions of rGO/Metal Oxide Nanocomposites as Promising Gas-Sensing Materials—A Review

et al. 2022

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Monitoring environmental hazards and pollution control is vital for the detection of harmful toxic gases from industrial activities and natural processes in the environment, such as nitrogen dioxide (NO2), ammonia (NH3), hydrogen (H2), hydrogen sulfide (H2S), carbon dioxide (CO2), and sulfur dioxide (SO2). This is to ensure the preservation of public health and promote workplace safety. Graphene and its derivatives, especially reduced graphene oxide (rGO), have been designated as ideal materials in gas-sensing devices as their electronic properties highly influence the potential to adsorb specified toxic gas molecules. Despite its exceptional sensitivity at low gas concentrations, the sensor selectivity of pristine graphene is relatively weak, which limits its utility in many practical gas sensor applications. In view of this, the hybridization technique through heterojunction configurations of rGO with metal oxides has been explored, which showed promising improvement and a synergistic effect on the gas-sensing capacity, particularly at room temperature sensitivity and selectivity, even at low concentrations of the target gas. The unique features of graphene as a preferential gas sensor material are first highlighted, followed by a brief discussion on the basic working mechanism, fabrication, and performance of hybridized rGO/metal oxide-based gas sensors for various toxic gases, including NO2, NH3, H2, H2S, CO2, and SO2. The challenges and prospects of the graphene/metal oxide-based based gas sensors are presented at the end of the review.

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Extremely sensitive and accurate H₂S sensor at room temperature fabricated with In-doped Co₃O₄ porous nanosheets

Abstract: In-Doped Co3O4 porous nanosheets were synthesized and exhibited a fast response and high selectivity towards H2S at room temperature.

Cited by 32 publications

References 54 publications

Solution-processed metal doping of sub-3 nm SnO₂ quantum wires for enhanced H₂S sensing at low temperature

Solution-processed metal doping of sub-3 nm SnO₂ quantum wires for enhanced H₂S sensing at low temperature

Metastable Antimony‐Doped SnO₂ Quantum Wires for Ultrasensitive Gas Sensors

Heterojunctions of rGO/Metal Oxide Nanocomposites as Promising Gas-Sensing Materials—A Review

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Extremely sensitive and accurate H2S sensor at room temperature fabricated with In-doped Co3O4 porous nanosheets

Abstract: In-Doped Co3O4 porous nanosheets were synthesized and exhibited a fast response and high selectivity towards H2S at room temperature.

Cited by 32 publications

References 54 publications

Solution-processed metal doping of sub-3 nm SnO2 quantum wires for enhanced H2S sensing at low temperature

Solution-processed metal doping of sub-3 nm SnO2 quantum wires for enhanced H2S sensing at low temperature

Metastable Antimony‐Doped SnO2 Quantum Wires for Ultrasensitive Gas Sensors

Heterojunctions of rGO/Metal Oxide Nanocomposites as Promising Gas-Sensing Materials—A Review

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Product

Resources

About

Extremely sensitive and accurate H₂S sensor at room temperature fabricated with In-doped Co₃O₄ porous nanosheets

Solution-processed metal doping of sub-3 nm SnO₂ quantum wires for enhanced H₂S sensing at low temperature

Solution-processed metal doping of sub-3 nm SnO₂ quantum wires for enhanced H₂S sensing at low temperature

Metastable Antimony‐Doped SnO₂ Quantum Wires for Ultrasensitive Gas Sensors