Room temperature operating sensitive and reproducible ammonia sensor based on PANI/hematite nanocomposite

Bora, Manisha; Adhav, Pravin; Diwate, Balasaheb; Pawar, Digamber; Dallavalle, Sabrina; Chabukswar, Vasant V.

doi:10.1080/25740881.2018.1563131

Cited by 9 publications

(7 citation statements)

References 39 publications

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“…For example, the preparation of polymer composites with iron oxide hematite (α-Fe 2 O 3 ) is highly desirable due to the low cost, non-toxicity, thermal stability, corrosion resistance, and strong UV absorption of hematite, which can lead to significantly improved material properties. From previous research on polymer composites with hematite, it is known that such materials have various improved properties: greater thermal stability [ 1 ], better mechanical properties [ 2 , 3 ], better corrosion resistance [ 4 ], greater absorption of electromagnetic radiation [ 5 ], and better sensing properties [ 6 ]. Due to the high thermal stability and UV-blocking effect of hematite [ 7 ], polymer composites with hematite have potential for use as packaging materials [ 3 ] and materials with UV-blocking and flame-retardant properties [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

“…Due to the high thermal stability and UV-blocking effect of hematite [ 7 ], polymer composites with hematite have potential for use as packaging materials [ 3 ] and materials with UV-blocking and flame-retardant properties [ 8 ]. The aforementioned studies published in the scientific literature dealt with the preparation and characterization of composites with hematite using different polymer matrices: polystyrene [ 1 , 2 ], polyethylene [ 9 ], polyurethane [ 4 ], polyacrylonitrile [ 10 ], polyaniline [ 6 ], poly(vinyl-pyrrolidone) [ 11 ], and polycaprolactone [ 12 ]. However, systematic research on the influence of the size and shape of hematite particles on the properties of composites with a polymer matrix has not yet been published.…”

Section: Introductionmentioning

confidence: 99%

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The Influence of Different Hematite (α-Fe2O3) Particles on the Thermal, Optical, Mechanical, and Barrier Properties of LDPE/Hematite Composites

et al. 2023

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There is an increasing need to develop new polymer composites with improved properties compared to conventional pure polymer materials. This work aims to develop composites of low-density polyethylene (LDPE) and iron oxide hematite particles. For this purpose, different types of hematite particles with well-defined shapes and narrow size distributions were synthesized: HC2 sample with pseudocubic hematite particles of an average diameter of 1020 nm, HE1 sample with ellipsoidal hematite particles of an average diameter of 533 nm, and HS1 sample with spherical hematite particles of an average diameter of 168 nm. The mass fractions of hematite in the composites were 0.25%, 0.5%, and 1%. Prepared LDPE/hematite composites were characterized by thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), and diffuse reflectance ultraviolet-visible-near infrared (UV-Vis-NIR) spectroscopy. The mechanical and barrier properties were also studied. The obtained results showed that all prepared composites have improved properties compared to the pure LDPE, especially the composites with pseudocubic hematite particles of well-defined shapes. The results of this study indicate that LDPE/hematite composites can be promising materials for a wide range of applications, especially as packaging materials where improved thermal and mechanical properties as well as resistance to ultraviolet (UV) irradiation are required.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Influence of Different Hematite (α-Fe2O3) Particles on the Thermal, Optical, Mechanical, and Barrier Properties of LDPE/Hematite Composites

et al. 2023

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“…In order to overcome this problem, the blending of organic and inorganic nanocomposites materials has been utilized smartly for various gas sensing applications. [19][20][21][22] It is also found that most of the transition metal oxides are n-type semiconductors and may be used for gas sensing purpose. In the present study nanocomposite of PANI with ferrous oxide (𝛼-Fe 2 O 3 ) is prepared in situ and is used for ammonia gas sensing purpose at room temperature.…”

Section: Introductionmentioning

confidence: 99%

PANI/Ferrous Oxide Based Hybrid Material for Ammonia Sensing Applications

Bora,

Chabukswar,

Lamanna

2023

Macromolecular Symposia

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In the present study, polyaniline (PANI) and ferrous oxide (α‐Fe2O3) are amalgamated for ammonia sensing purpose. The hybrid nanocomposite is prepared by a single step in situ chemical oxidative polymerization of aniline in presence of hydrothermally prepared α‐Fe2O3 nanoparticles. The structural and compositional analyses of the hybrid material are fully executed by FTIR, PXRD, and SEM techniques. A naive, exceedingly selective, quickly restorable, and ambient temperature functioning ammonia detecting device is established by using PANI/α‐Fe2O3. The investigation results indicate that the PANI/α‐Fe2O3 hybrid nanocomposite exhibits selective sensing ability towards ammonia vapors. The PANI/α‐Fe2O3 displays excellent response for 5 ppm and maximum response for 100 ppm of ammonia. The response time of the PANI/α‐Fe2O3 sensor is found to be quick with reasonably short recovery time. Due to excellent reusability, good environmental stability, and highly economical synthesis the PANI/α‐Fe2O3 delivers a capable, simple, and efficient sensor system for ammonia detection at ambient temperature.

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“…Conductive polymers are one of the most preferred classes of materials for use in gas sensors because of their promising electronic properties. Therefore, in the past couple of years numerous works have been reported on conducting polymer-based biosensors such as the polyaniline/hematite nanocomposite, and a composite of polyaniline/multiwalled carbon nanotubes/molybdenum disulfide has been developed for sensitive and reproducible ammonia gas sensing. , Several composites of polythiophene have also been used as an effective gas sensor. − Polypyrrole (PPy) is another widely studied conductive polymer because of its simple synthesis process, good electrical conductivity, low cost, and decent chemical and electrochemical stabilities. , Several studies have been reported on the application of PPy in gas sensors for detection of different gases. Joshi and co-workers have developed PPy thin films by chemical polymerization and studied their ammonia sensing properties at room temperature .…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, in the past couple of years numerous works have been reported on conducting polymerbased biosensors such as the polyaniline/hematite nanocomposite, and a composite of polyaniline/multiwalled carbon nanotubes/molybdenum disulfide has been developed for sensitive and reproducible ammonia gas sensing. 15,16 Several composites of polythiophene have also been used as an effective gas sensor. 17 studied conductive polymer because of its simple synthesis process, good electrical conductivity, low cost, and decent chemical and electrochemical stabilities.…”

Section: Introductionmentioning

confidence: 99%

A Simple Route to Prepare Polypyrrole-Coated Filter Papers via Vapor Phase Polymerization and Their Gas Sensing Application

Majumdar

Sarmah

Mahanta

2020

ACS Appl. Polym. Mater.

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Vapor phase polymerization has been used for the synthesis of polypyrrole-coated filter paper (PPy-FP) using a simple experimental setup. In addition, we have doped the polymer-coated filter papers with hydrochloric acid (HCl), camphorsulfonic acid (CSA), and p-toluenesulfonic acid (PTSA) to prepare HCl-PPy-FP, CSA-PPy-FP, and PTSA–PPy-FP, respectively. These samples were characterized by scanning electron microscopy (SEM), thermogravimetric analysis (TGA), attenuated total reflectance–Fourier transform infrared spectroscopy (ATR-FTIR), energy dispersive X-ray (EDX) analysis, and powder X-ray diffraction (PXRD) techniques. The prepared PPy-coated filter papers have been used for ammonia vapor sensing studies at room temperature. The sensing device of the hybrid filter papers was developed by pasting Cu strips as electrodes. It has been observed that doping enhances the conductivity from 1.78 × 10–5 to 3.34 × 10–5 S/cm. The sensing performance also improved on doping, and among the developed sensors, HCl-PPy-FP shows the best result. The limit of detection (LOD) value for PPy-FP is found to be 13 ppm, which has been improved up to 5.2 ppm for HCl-PPy-FP. Doping increases the delocalization along the PPy chain to generate more active sites. The fabricated devices are flexible, easy to handle, and cost-effective.

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Room temperature operating sensitive and reproducible ammonia sensor based on PANI/hematite nanocomposite

Cited by 9 publications

References 39 publications

The Influence of Different Hematite (α-Fe2O3) Particles on the Thermal, Optical, Mechanical, and Barrier Properties of LDPE/Hematite Composites

The Influence of Different Hematite (α-Fe2O3) Particles on the Thermal, Optical, Mechanical, and Barrier Properties of LDPE/Hematite Composites

PANI/Ferrous Oxide Based Hybrid Material for Ammonia Sensing Applications

A Simple Route to Prepare Polypyrrole-Coated Filter Papers via Vapor Phase Polymerization and Their Gas Sensing Application

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