Detection of Mixed BTEX With Suppressed Reaction Specificity Using Tin Oxide Nanoparticles Functionalized by Multi-Metalloporphyrins

Cho, Byeonghwa; Lee, Kyounghoon; Jo, Eunhwan; Kim, Jongbaeg

doi:10.1109/jsen.2019.2940455

Cited by 13 publications

(6 citation statements)

References 28 publications

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“…This experiment was performed by coating a sensing material on a previously manufactured sensor platform. The sensor platform was fabricated as described in a previous paper [20][21][22]. The previous paper contains the characteristics of the sensor platform, including configuration, process flow diagram, and heater operating characteristics.…”

Section: Methodsmentioning

confidence: 99%

Toluene sensing characteristics of tin oxide-based gas sensor deposited with various amounts of metalloporphyrin

Cho

Kim

2022

Micro and Nano Syst Lett

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In this study, the sensing characteristics of tin oxide-based gas sensors deposit with different amounts of metalloporphyrin, which is a functionalization substance, are evaluated. The mass of metalloporphyrin deposited is 3, 10, 20, 30, and 40 mg for 5 different sensors prepared. The deposition of 3 mg of metalloporphyrin result in an island form of functionalization instead of a thin film; meanwhile, thin films with thicknesses of 25, 35, 74, and 92 nm are formed for the other four cases. As the deposition amount of metalloporphyrin increase, the performance of the sensor deteriorate. The samples are prepared by subdividing the amount of metalloporphyrin source to determine the optimized deposition amount. A sample is prepared with deposition amounts ranging between 1 to 10 mg. The sensors deposit with 3–5 mg metalloporphyrin has excellent response, response, and recovery time characteristics.

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Section: Methodsmentioning

confidence: 99%

Toluene sensing characteristics of tin oxide-based gas sensor deposited with various amounts of metalloporphyrin

Cho

Kim

2022

Micro and Nano Syst Lett

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“…Given this backdrop, to the authors’ best knowledge, very few research papers are focused on the combination of MOS with porphyrin macrocycles for sensing application, and most of them are focused on the use of zinc oxide as MOS. − Furthermore, to date, the only exploration of hybrid materials comprising porphyrins and SnO 2 demonstrates that this combination enhances the performance of optical oxygen sensors and presents encouraging prospects for developing chemiresistive sensor materials capable of detecting mixed BTEX compounds …”

Section: Introductionmentioning

confidence: 99%

How the Interplay between SnO₂ and Zn(II) Porphyrins Impacts on the Electronic Features of Gaseous Acetone Chemiresistors

Tessore,

Pargoletti,

Di Carlo

et al. 2024

ACS Appl. Mater. Interfaces

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Herein, the integration of SnO 2 nanoparticles with two Zn(II) porphyrins�Zn(II) 5,10,15, and its perfluorinated counterpart, Zn(II) 5,10,15,20-tetrakis-(pentafluorophenyl)porphyrin (ZnTPPF 20 )�was investigated for the sensing of gaseous acetone at 120 °C, adopting three Zn-porphyrin/ SnO 2 weight ratios (1:4, 1:32, and 1:64). For the first time, we were able to provide evidence of the correlation between the materials' conductivity and these nanocomposites' sensing performances, obtaining optimal results with a 1:32 ratio for ZnTPPF 20 /SnO 2 and showcasing a remarkable detection limit of 200 ppb together with a boosted sensing signal with respect to bare SnO 2 . To delve deeper, the combination of experimental data with density functional theory calculations unveiled an electron-donating behavior of both porphyrins when interacting with tin dioxide semiconductor, especially for the nonfluorinated one. The study suggested that the interplay between electrons injected, from the porphyrins' highest occupied molecular orbital to SnO 2 conduction band, and the latter's available electronic states has a dramatic impact to boost the chemiresistive sensing. Indeed, we highlighted that the key lies in preventing the full saturation of SnO 2 electronic states concomitantly increasing the materials' conductivity: in this respect, the best compromise turned out to be the perfluorinated porphyrin. A further corroboration of our findings was obtained by illuminating the sensors during measurements with light-emitting diode (LED) light. Actually, we demonstrated that it does not have any impact on improving the sensing behavior, most probably due to the electronic oversaturation and scattering caused by LED excitation in porphyrins. Lastly, the most effective hybrids (1:32 ratio) were physicochemically characterized, confirming the physisorption of the macrocycles onto the SnO 2 surface. In conclusion, herein, we underscore the feasibility of customizing the porphyrin chemistry and porphyrin-to-SnO 2 ratio to enhance the gaseous sensing of bare metal oxides, providing valuable insights for the engineering of highly performing light-free chemiresistors.

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“…The resistive xylene sensors based on metal oxides suffer from a major drawback of high operating temperatures. Various nanostructured materials such as NiO, − SnO 2 , V 2 O 5 , TiO 2 , MoO 3 , ZnO, NiCo 2 O 4 , , Co 3 O 4 , , WO 3 , − and CoCr 2 O 4 have been reported in the literature. For example, Park et al performed the morphological tuning of SnO 2 and configurational tuning using a Au catalyst for a highly selective xylene sensor operable at 300 °C with the best response of 771.3 in 0% RH, which decreased drastically in the presence of 30% RH to 45.6 for 5 ppm of xylene .…”

Section: Introductionmentioning

confidence: 99%

Room Temperature Humidity Tolerant Xylene Sensor Using a Sn-SnO₂ Nanocomposite

Verma

Bahuguna

Saharan

et al. 2023

ACS Appl. Mater. Interfaces

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Xylene is one of the representative indoor pollutants, even in ppb levels, that affect human health directly. Due to the non-polar and less reactive nature of xylene, its room temperature detection is challenging. This work demonstrates a metallic tin-doped Sn-SnO 2 nanocomposite under controlled pH conditions via a simple solvothermal route. The Sn nanoparticles are uniformly distributed inside the SnO 2 nanospheres of ∼70 nm with a high specific surface area of 118.8 m 2 /g. The surface of the Sn-SnO 2 nanocomposite exhibits strong affinity toward benzene, toluene, ethylbenzene, and xylene (BTEX) compared to other polar volatile organic compounds (VOCs) such as ethanol, acetone, isopropyl alcohol, formaldehyde, and chloroform tested in this study. The sensor's response is highest for xylene among BTEX molecules. Under ambient room temperature conditions, the sensor exhibits a linear response to xylene in the 1−100 ppm range with a sensitivity of ∼255% at 60 ppm within ∼1.5 s and recovers in ∼40 s. The sensor is hardly affected by humidity variations (40−70%), leading to enhanced reliability and repeatability under dynamic environmental conditions. The meso and microporous nanosphere morphology act as a nanocontainer for non-polar VOCs to diffuse inside the nanostructures, providing easy accessibility. The metallic Sn increases the affinity for less reactive xylene at room temperature. Thus, the nanocatalytic Sn-SnO 2 nanocomposite is an active gas/VOC sensing material and provides an effective solution for sensing major indoor pollutants under humid conditions.

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Detection of Mixed BTEX With Suppressed Reaction Specificity Using Tin Oxide Nanoparticles Functionalized by Multi-Metalloporphyrins

Cited by 13 publications

References 28 publications

Toluene sensing characteristics of tin oxide-based gas sensor deposited with various amounts of metalloporphyrin

Toluene sensing characteristics of tin oxide-based gas sensor deposited with various amounts of metalloporphyrin

How the Interplay between SnO₂ and Zn(II) Porphyrins Impacts on the Electronic Features of Gaseous Acetone Chemiresistors

Room Temperature Humidity Tolerant Xylene Sensor Using a Sn-SnO₂ Nanocomposite

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Detection of Mixed BTEX With Suppressed Reaction Specificity Using Tin Oxide Nanoparticles Functionalized by Multi-Metalloporphyrins

Cited by 13 publications

References 28 publications

Toluene sensing characteristics of tin oxide-based gas sensor deposited with various amounts of metalloporphyrin

Toluene sensing characteristics of tin oxide-based gas sensor deposited with various amounts of metalloporphyrin

How the Interplay between SnO2 and Zn(II) Porphyrins Impacts on the Electronic Features of Gaseous Acetone Chemiresistors

Room Temperature Humidity Tolerant Xylene Sensor Using a Sn-SnO2 Nanocomposite

Contact Info

Product

Resources

About

How the Interplay between SnO₂ and Zn(II) Porphyrins Impacts on the Electronic Features of Gaseous Acetone Chemiresistors

Room Temperature Humidity Tolerant Xylene Sensor Using a Sn-SnO₂ Nanocomposite