Synthesis of a porous SiO2–H3BO3–V2O5–P2O5 glassy composite: structural and surface morphological behaviour for CO2 gas sensing applications

Fatima, Zaireen; Gautam, Chandkiram; Singh, Ajeet; Avinashi, Sarvesh Kumar; Yadav, B. C.; Khan, Afroj A.

doi:10.1039/d2ra04455b

Cited by 6 publications

(4 citation statements)

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“…By investigating how sensors respond to various gases, these studies contribute to enhanced selectivity, reliability, and overall performance, which are crucial for gas sensor applications. 57 In our work, the developed CZO-based sensing materials have demonstrated high selectivity properties upon consecutive exposure (CO 2 , CO, and CH 4 ) and when exposed to a mixture of CO 2 and acetone (see Figure 8 c,d). It was observed that certain gases influenced the resistance background level, potentially indicating low desorption.…”

Section: Resultsmentioning

confidence: 62%

“…Cross-sensitivity studies are pivotal in gas sensor development to ensure improved specificity and accuracy. By investigating how sensors respond to various gases, these studies contribute to enhanced selectivity, reliability, and overall performance, which are crucial for gas sensor applications . In our work, the developed CZO-based sensing materials have demonstrated high selectivity properties upon consecutive exposure (CO 2 , CO, and CH 4 ) and when exposed to a mixture of CO 2 and acetone (see Figure c,d).…”

Section: Resultsmentioning

confidence: 99%

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Sensitivity Enhancement of CO₂ Sensors at Room Temperature Based on the CZO Nanorod Architecture

Soltabayev,

Raiymbekov,

Nuftolla

et al. 2024

ACS Sens.

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Cobalt-doped ZnO (CZO) thin films were deposited on glass substrates at room temperature by radio frequency (RF) magnetron sputtering of a single target prepared with ZnO and Co 3 O 4 powders. Changes in the crystallinity, morphology, optical properties, and chemical composition of the CZO thin films were investigated at various sputtering powers of 45, 60, and 75 W. All samples presented a hexagonal wurtzite-type structure with a preferential c-axis at the (002) plane, along with a distinct change in the strain values through X-ray diffraction patterns. Scanning electron and atomic force microscopy revealed uniform and dense deposition of nanorod CZO samples with a high surface roughness (RMS). The Hall mobility and carrier concentration increased with the introduction of Co + ions into the ZnO matrix, as seen from the Hall effect study. The gradual increase of the power applied on the target source significantly affected the morphology of the CZO thin film, which is reflected in the CO 2 -sensing performance. The best gas response to CO 2 was recorded for CZO-60 W with a response of 1.45 for 500 ppm CO 2 , and the response/recovery times were 72 and 35 s, respectively. The distinguishing feature of the CZO sensor is its ability to effectively and rapidly detect the CO 2 target gas at room temperature (∼27 °C, RT).

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Section: Resultsmentioning

confidence: 62%

Section: Resultsmentioning

confidence: 99%

Sensitivity Enhancement of CO₂ Sensors at Room Temperature Based on the CZO Nanorod Architecture

Soltabayev,

Raiymbekov,

Nuftolla

et al. 2024

ACS Sens.

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“…CO 2 on dissociation produces carbonic acid ions (HCO 3 ̅ ) that are acidic, whereas NH 3 dissociation forms ammonium ions (NH 4 + ) that are basic in nature. The adsorption/desorption of these charged species influences the electrical resistance of the PDMD sensor. − …”

Section: Resultsmentioning

confidence: 99%

Chemiresistive Sensor for Enhanced CO₂ Gas Monitoring

Rath,

Naficy,

Giaretta

et al. 2024

ACS Sens.

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Carbon dioxide (CO 2 ) gas sensing and monitoring have gained prominence for applications such as smart food packaging, environmental monitoring of greenhouse gases, and medical diagnostic tests. Although CO 2 sensors based on metal oxide semiconductors are readily available, they often suffer from limitations such as high operating temperatures (>250 °C), limited response at elevated humidity levels (>60% RH), bulkiness, and limited selectivity. In this study, we designed a chemiresistive sensor for CO 2 detection to overcome these problems. The sensing material of this sensor consists of a CO 2 switchable polymer based on N-3-(dimethylamino)propyl methacrylamide (DMAPMAm) and methoxyethyl methacrylate (MEMA) [P(D-co-M)], and diethylamine. The designed sensor has a detection range for CO 2 between 10 3 and 10 6 ppm even at high humidity levels (>80% RH), and it is capable of differentiating ammonia at low concentrations (0.1−5 ppm) from CO 2 . The addition of diethylamine improved sensor performance such as selectivity, response/recovery time, and long-term stability. These data demonstrate the potential of using this sensor for the detection of food spoilage.

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“…The sensing device, utilized for evaluating electrical resistance which is connected to the computer system through the Keithley electrometer (6517B). All the measurements were conducted at ambient temperature (32 °C and 60% RH) [30]. Figure 1 illustrates a schematic representation of the CO 2 gas sensing setup.…”

Section: Device Fabrication and Measurementsmentioning

confidence: 99%

Fabrication, structural, morphological, and mechanical behaviour of fly ash doped clay ceramics based CO₂ gas sensor

Kumari,

Rakhi,

Hussain

et al. 2024

Phys. Scr.

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Various attempts have been made to fabricate fly ash-doped clay composites via solid state reaction method. Additionally, to investigate the structural, mechanical, surface morphology, and CO2 gas sensing behavior, the fabricated clay composites were sintered at three different temperatures 1000, 1100, and 1200 °C (COF1, COF2, COF3) for 4 h. The green and sintered densities of the fabricated composites were found to be in the range of 2.17-2.13 g/cm3 and 1.38 to 1.30 g/cm3. Further, various characterization techniques such as X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, universal testing machine (UTM) and scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy (EDAX) were carried out. Moreover, to determine the compressive strength and Young’s modulus values, a universal testing machine (UTM) was used. The fracture toughness of the fabricated composites, COF2 and COF3 were found to be 7.84 MPa-m1/2 and 2.22 MPa-m1/2. The COF3 composite exhibited a sensing response, response time, recovery time of 3.39 at 1200 ppm CO2, 16.95 s and 18.05 s respectively. Consequently, this porous clay composite can be fabricated in a cost-effective and eco-friendly manner, hence beneficial for CO2 gas sensing applications.

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Synthesis of a porous SiO₂–H₃BO₃–V₂O₅–P₂O₅ glassy composite: structural and surface morphological behaviour for CO₂ gas sensing applications

Abstract: The present work mainly focuses on the fabrication of a porous glass 40SiO2–35H3BO3–19V2O5–6P2O5via a melt-quenching technique.

Cited by 6 publications

References 55 publications

Sensitivity Enhancement of CO₂ Sensors at Room Temperature Based on the CZO Nanorod Architecture

Sensitivity Enhancement of CO₂ Sensors at Room Temperature Based on the CZO Nanorod Architecture

Chemiresistive Sensor for Enhanced CO₂ Gas Monitoring

Fabrication, structural, morphological, and mechanical behaviour of fly ash doped clay ceramics based CO₂ gas sensor

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Synthesis of a porous SiO2–H3BO3–V2O5–P2O5 glassy composite: structural and surface morphological behaviour for CO2 gas sensing applications

Abstract: The present work mainly focuses on the fabrication of a porous glass 40SiO2–35H3BO3–19V2O5–6P2O5via a melt-quenching technique.

Cited by 6 publications

References 55 publications

Sensitivity Enhancement of CO2 Sensors at Room Temperature Based on the CZO Nanorod Architecture

Sensitivity Enhancement of CO2 Sensors at Room Temperature Based on the CZO Nanorod Architecture

Chemiresistive Sensor for Enhanced CO2 Gas Monitoring

Fabrication, structural, morphological, and mechanical behaviour of fly ash doped clay ceramics based CO2 gas sensor

Contact Info

Product

Resources

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Synthesis of a porous SiO₂–H₃BO₃–V₂O₅–P₂O₅ glassy composite: structural and surface morphological behaviour for CO₂ gas sensing applications

Sensitivity Enhancement of CO₂ Sensors at Room Temperature Based on the CZO Nanorod Architecture

Sensitivity Enhancement of CO₂ Sensors at Room Temperature Based on the CZO Nanorod Architecture

Chemiresistive Sensor for Enhanced CO₂ Gas Monitoring

Fabrication, structural, morphological, and mechanical behaviour of fly ash doped clay ceramics based CO₂ gas sensor