Rational design of ordered porous SnO2/ZrO2 thin films for fast and selective triethylamine detection with humidity resistance

Lou, Chengming; Li, Zishuo; Yang, Chen; Liu, Xianghong; Zheng, Wei; Zhang, Jun

doi:10.1016/j.snb.2021.129572

Cited by 69 publications

(16 citation statements)

References 53 publications

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“…The European Commission has recommended an occupational exposure limit of 1 ppm for TEA. [ 6 ] Hence sensitive detection of TEA has attracted increasing attention in the past years.…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous Co₃O₄/Carbon Nanofibers for Low Temperature Triethylamine Detection: Mechanistic Insights by Operando DRIFTS and DFT

Lou

Wang

Liu

et al. 2021

Adv Materials Inter

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Metal oxide semiconductors (MOS) have been extensively investigated for the detection of toxic organic amines. However, the high working temperature of metal oxide semiconductors (MOS) remains a challenge that greatly limits their potential in sensor technology. Meanwhile, the sensing mechanism of triethylamine (TEA) has not been fully understood. In this work, the authors report the design of heterogeneous Co3O4/carbon nanofibers (Co3O4/CNFs) and their utilization toward TEA detection at low temperature. With an optimized loading density of Co3O4 nanocrystals, the sensor based on Co3O4/CNFs, which exhibits remarkable response to TEA even at room temperature, delivers the best response of Co3O4/CNFs at 150 °C. Notably, the response of Co3O4/CNFs is three times higher than that of pristine Co3O4. More importantly, they, for the first time, elucidate the TEA sensing mechanism via operando diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and density functional theory (DFT) calculations, revealing that the oxidation of TEA undergoes a two‐step process. This work not only paves the way to design high performance sensing materials, but also contributes to the fundamental understanding of a sensing mechanism.

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“…The European Commission has recommended an occupational exposure limit of 1 ppm for TEA. [ 6 ] Hence sensitive detection of TEA has attracted increasing attention in the past years.…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous Co₃O₄/Carbon Nanofibers for Low Temperature Triethylamine Detection: Mechanistic Insights by Operando DRIFTS and DFT

Lou

Wang

Liu

et al. 2021

Adv Materials Inter

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“…It should be noted that the ZLT-2 sensor exhibits a fast response–recovery characteristics and good response linearity. Furthermore, the theoretical LOD of the sensor based on the ZLT-2 nanocomposite is calculated by the formula , where σ is the standard deviation of the baseline conductance recorded within 20 s after stabilization in air and slope represents the slope of the gas response. According to the formula, the LOD was calculated as 9 ppb, which is better than the LOD (5 ppm) of the LDHs/Ti 3 C 2 T x sensor, indicating the potential application value of the ZIF-8/LDHs/Ti 3 C 2 T x nanocomposite in low-concentration IPA detection fields.…”

Section: Resultsmentioning

confidence: 99%

“…It should be noted that the ZLT-2 sensor exhibits a fast response−recovery characteristics and good response linearity. Furthermore, the theoretical LOD of the sensor based on the ZLT-2 nanocomposite is calculated by the formula 47,48…”

Section: Gas-sensing Performancementioning

confidence: 99%

Moisture-Resistant Gas Sensor Derived from ZIF-8/Layered Double Hydroxide/Ti₃C₂T_x Nanocomposites for Trace Isopropanol Detection

Qin

Gui

Bai

et al. 2022

ACS Appl. Nano Mater.

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Layered double hydroxides (LDHs) are recently gaining scientific attention in the gas sensor field. However, the general layer-stacking of two-dimensional (2D) materials significantly limits the performance of LDHs-based gas sensors due to the resulting reduction of gas-active sites. To address the issue, we designed and successfully constructed a nanocomposite of ZIF-8/ LDHs/Ti 3 C 2 T x via a sequential induced growth of LDHs and ZIF-8 on the 2D Ti 3 C 2 T x nanosheets. The achieved ZIF-8/LDHs/ Ti 3 C 2 T x nanocomposite exhibits the uniform coverage of hexagonal ZIF-8 particles on LDHs/Ti 3 C 2 T x . In the nanocomposite, the ZIF-8 particles grown with Zn atoms in LDHs as the core sites form a tight ternary heterostructure with LDHs and Ti 3 C 2 T x , and a two-dimensional electron gas (2DEG) region with high conductivity is generated during an isopropanol (IPA)sensing process. Benefiting from the modification of ZIF-8 and the generation of 2DEG, the gas adsorption sites and effective conductive pathway are prominently increased, which is crucial for the improvement of gas-sensing performance. Resultantly, the asfabricated ZIF-8/LDHs/Ti 3 C 2 T x sensor can detect rarefied IPA at the sub-ppm level with a theoretical limit of detection of 9 ppb; it shows a response value of 61.82 toward 50 ppm IPA at room temperature (RT), which is about 27 times boost in contrast to LDHs/ Ti 3 C 2 T x . Notably, the ZIF-8/LDHs/Ti 3 C 2 T x sensor still shows a significant response (5.12) toward 2.5 ppm IPA under high relative humidity (85 %RH) at RT. The gas-sensing mechanism was clarified from the heterostructure effect, adsorption energy calculation, and morphology promotion. Above all, this research provides a route to explore the application potential of LDHs-based nanocomposites in both atmospheric and breath IPA detection.

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“…5 Thus, the U.S. Conference of Governmental Industrial Hygienists sets a stringent threshold of 1 ppm. 6 Currently, some research groups have found that the concentration of TEA is closely related to the freshness of seafood and can be used as a seafood freshness identification criterion because it is the primary component of the "fishy" odor. 7 Accordingly, to ensure the safety of related chemical industry practitioners, environmental quality of chemical plants and the freshness of seafood related with food safety, it is particularly important to develop simple, efficient, low-cost, and stable TEA sensors.…”

mentioning

confidence: 99%

“…Triethylamine (TEA, N(C 2 H 5 ) 3 ), as a common volatile organic compound (VOC) with a strong ammonia odor, is flammable, explosive, toxic, and highly irritating and is used as an important raw material for the production of preservatives, catalysts, pesticides, and synthetic dyes. − Prolonged exposure to TEA will irritate the respiratory tract and cause great damage to skin and mucosa . Thus, the U.S. Conference of Governmental Industrial Hygienists sets a stringent threshold of 1 ppm . Currently, some research groups have found that the concentration of TEA is closely related to the freshness of seafood and can be used as a seafood freshness identification criterion because it is the primary component of the “fishy” odor .…”

mentioning

confidence: 99%

MOF-Derived Mesoporous and Hierarchical Hollow-Structured In₂O₃-NiO Composites for Enhanced Triethylamine Sensing

Jin

Zhao

et al. 2021

ACS Sens.

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It remains a challenge to design and fabricate highperformance gas sensors using metal−organic framework (MOF)derived metal oxide semiconductors (MOS) as sensing materials due to the structural damage during the annealing process. In this study, the mesoporous In 2 O 3 -NiO hollow spheres consisting of nanosheets were prepared via a solvothermal reaction and subsequent cation exchange. More importantly, the transformation of Ni-MOF into In/ Ni-MOF through exchanging the Ni 2+ ion with In 3+ ion can prevent the destruction of the porous reticular skeleton and hierarchical structure of Ni-MOF during calcination. Thus, the mesoporous In 2 O 3 -NiO hollow composites possess high porosity and large specific surface area (55.5 m 2 g −1 ), which can produce sufficient permeability pathways for volatile organic compound (VOCs) molecules, maximize the active sites, and enhance the capacity of VOC capture. The mesoporous In 2 O 3 -NiO-based sensors exhibit enhanced triethylamine (TEA) sensing performance (S = 33.9−100 ppm) with distinct selectivity, good long-term stability, and lower detection limit (500 ppb) at 200 °C. These results can be attributed to the mesoporous hollow hierarchical structure and p−n junction of In 2 O 3 -NiO. The preparation concept mentioned in this work may provide a versatile platform applicable to various mesoporous composite sensing material-based hollow structures.

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Rational design of ordered porous SnO2/ZrO2 thin films for fast and selective triethylamine detection with humidity resistance

Cited by 69 publications

References 53 publications

Heterogeneous Co₃O₄/Carbon Nanofibers for Low Temperature Triethylamine Detection: Mechanistic Insights by Operando DRIFTS and DFT

Heterogeneous Co₃O₄/Carbon Nanofibers for Low Temperature Triethylamine Detection: Mechanistic Insights by Operando DRIFTS and DFT

Moisture-Resistant Gas Sensor Derived from ZIF-8/Layered Double Hydroxide/Ti₃C₂T_x Nanocomposites for Trace Isopropanol Detection

MOF-Derived Mesoporous and Hierarchical Hollow-Structured In₂O₃-NiO Composites for Enhanced Triethylamine Sensing

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Rational design of ordered porous SnO2/ZrO2 thin films for fast and selective triethylamine detection with humidity resistance

Cited by 69 publications

References 53 publications

Heterogeneous Co3O4/Carbon Nanofibers for Low Temperature Triethylamine Detection: Mechanistic Insights by Operando DRIFTS and DFT

Heterogeneous Co3O4/Carbon Nanofibers for Low Temperature Triethylamine Detection: Mechanistic Insights by Operando DRIFTS and DFT

Moisture-Resistant Gas Sensor Derived from ZIF-8/Layered Double Hydroxide/Ti3C2Tx Nanocomposites for Trace Isopropanol Detection

MOF-Derived Mesoporous and Hierarchical Hollow-Structured In2O3-NiO Composites for Enhanced Triethylamine Sensing

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Heterogeneous Co₃O₄/Carbon Nanofibers for Low Temperature Triethylamine Detection: Mechanistic Insights by Operando DRIFTS and DFT

Heterogeneous Co₃O₄/Carbon Nanofibers for Low Temperature Triethylamine Detection: Mechanistic Insights by Operando DRIFTS and DFT

Moisture-Resistant Gas Sensor Derived from ZIF-8/Layered Double Hydroxide/Ti₃C₂T_x Nanocomposites for Trace Isopropanol Detection

MOF-Derived Mesoporous and Hierarchical Hollow-Structured In₂O₃-NiO Composites for Enhanced Triethylamine Sensing