Optical fiber based ammonia gas sensor with carbon nanotubes sensing enhancement

Arasu, P. Thillai; Khalaf, Ahmed Lateef; Aziz, Siti Hajar Ab; Yaacob, Mohd Hanif; Noor, Ahmad Shukri Mohd

doi:10.1109/tenconspring.2017.8069983

Cited by 6 publications

(4 citation statements)

References 10 publications

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“…Denmark and Lithuania need to reduce emissions by more than 10% [ 1 ]. Ammonia emitted from livestock, industrial processes or NH 3 emitted to the atmosphere through either the large-scale usage of fertilizers or gas slippage from the NH 3 -SCR-DeNO x applications can cause serious damage to human health (i.e., to the eyes, throat, nose, etc., if its concentration exceeds 50–100 ppm) [ 2 ], and environment (e.g., acidification, formation of haze, Figure 1 ).…”

Section: Introductionmentioning

confidence: 99%

A Comparative Mini-Review on Transition Metal Oxides Applied for the Selective Catalytic Ammonia Oxidation (NH3-SCO)

Jabłońska

Robles

2022

Materials

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The selective catalytic oxidation of NH3 (NH3-SCO) into N2 and H2O is an efficient technology for NH3 abatement in diesel vehicles. However, the catalysts dedicated to NH3-SCO are still under development. One of the groups of such catalysts constituted transition metal-based catalysts, including hydrotalcite-derived mixed metal oxides. This class of materials is characterized by tailored composition, homogenously dispersed mixed metal oxides, exhibiting high specific surface area and thermal stability. Thus, firstly, we give a short introduction to the structure and composition of hydrotalcite-like materials and their applications in NH3-SCO. Secondly, an overview of other transition metal-based catalysts reported in the literature is given, following a comparison of both groups. The challenges in NH3-SCO applications are provided, while the reaction mechanisms are discussed for particular systems.

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Section: Introductionmentioning

confidence: 99%

A Comparative Mini-Review on Transition Metal Oxides Applied for the Selective Catalytic Ammonia Oxidation (NH3-SCO)

Jabłońska

Robles

2022

Materials

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“…Ammonia gas is an important chemical resource in many chemical industries such as fertilizer production industry, automobile industry, cleaning products industry, pharmaceutical industry, plastic and polymer manufacturing industry and herbicide manufacturing industry. Employees who work in such industrial area are at risk to be exposed to some concentration of NH3 for a long-term which may cause various symptoms such as irritation of skin and eyes and problems in respiratory system as shown in Figure 1 [1]. In atmosphere, the ammonia presents lower than 1 -5 ppb [2].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Ammonia Gas Sensing by Tin Dioxide-Polyaniline Nanocomposite

et al. 2022

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Ammonia (NH3) gas is an important chemical in many industries. Employees working in such industrial areas may exposed to a certain concentration of NH3 which could cause various symptoms such as irritation of skin and eyes and problems in respiratory system. The development of new NH3 sensing material has attracted great attention. In this study, porous tin dioxide nanofibers (SnO2 NFs) were successfully fabricated by electrospinning. The SnO2 NFs was composited with polyaniline (PANI), conducting polymer. The tin dioxide nanofibers@polyaniline nanocomposite (SnO2 NFs@PANI) was examined and showed improving and desirable sensing for NH3 gas, which includes high sensitivity, quick response and fast recovery times at room temperature. HIGHLIGHTS Ammonia (NH3) gas has been used in many industries. For worker safety in those industrial area, a reliable NH3 gas sensor is necessary A new tin dioxide nanofibers@polyaniline nanocomposite (SnO2 NFs@PANI) had successfully developed for a selectively ammonia gas sensor Excellent analytical performance in team of stability, repeatability and widely response for NH3 concentration was achieved GRAPHICAL ABSTRACT

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“…Ammonia gas is an important chemical resource in many chemical industries such as fertilizer production industry, automobile industry, cleaning products industry, pharmaceutical industry, plastic and polymer manufacturing industry and herbicide manufacturing industry. Employees who work in such industrial area are at risk to be exposed to some concentration of NH 3 for a long-term which may cause various symptoms such as irritation of skin and eyes and problems in respiratory system as showed in Figure 1 (Arasu et al, 2017). In atmosphere, the ammonia presents lower than 1-5 ppb (Pandeeswari et al, 2022).…”

Section: List Of Abbreviationsmentioning

confidence: 99%

“…Selectivity of the SnO 2 NFs@PANI sensor was examined by 10 ppm of various gases: NH 3 , acetone, ethanol, formaldehyde, methanol, and toluene gases at room temperature due to these gases are used in industries such as the agricultural industry, fertilizer production industry, cleaning products industry, pharmaceutical industry and plastic and polymer manufacturing industry (Arasu et al, 2017). The results summarized in Figure 4.14 clearly demonstrate the highest response on the NH 3 gas compared to the other gases.…”

Section: Selectivitymentioning

confidence: 99%

Enhancement of ammonia gas sensing by metal oxide-polyaniline nanocomposite

Soibang

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Ammonia (NH3) gas is an important chemical in many industries. Employees who work in those industrial areas may exposed to a certain concentration of NH3 which could cause various symptoms such as irritation of skin and eyes and problems in respiratory system. The development of new NH3 sensing material has drawn a great attention. In this study, porous tin dioxide nanofibers (SnO2 NFs) were successfully fabricated by an electrospinning technique. The SnO2 NFs were composited with polyaniline (PANI), conducting polymer and form tin dioxide nanofibers@polyaniline nanocomposite (SnO2 NFs@PANI). The morphology was characterized using SEM-EDS and XRD. The SnO2 NFs@PANI was examined and showed improving and desirable sensing for NH3 gas, which includes a good linearity response in a range of 0.4 - 100 ppm, and a detection limit of 12.4 ppb at room temperature. Furthermore, the present sensor also showed a rapid response and recovery rates of 87 s and 160 s, good selectivity, repeatability, long-term stability, and reproducibility to 10 ppm NH3 at room temperature. Furthermore, the gas sensing mechanisms of NH3 on SnO2 NFs@PANI were also discussed in detail. The enhanced sensing characteristics of nanocomposites were related to the morphology structure and p-n heterojunction between PANI and SnO2 NFs.

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Optical fiber based ammonia gas sensor with carbon nanotubes sensing enhancement

Cited by 6 publications

References 10 publications

A Comparative Mini-Review on Transition Metal Oxides Applied for the Selective Catalytic Ammonia Oxidation (NH3-SCO)

A Comparative Mini-Review on Transition Metal Oxides Applied for the Selective Catalytic Ammonia Oxidation (NH3-SCO)

Enhancement of Ammonia Gas Sensing by Tin Dioxide-Polyaniline Nanocomposite

Enhancement of ammonia gas sensing by metal oxide-polyaniline nanocomposite

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