Facile fabrication of polyaniline/multi-walled carbon nanotubes/molybdenum disulfide ternary nanocomposite and its high-performance ammonia-sensing at room temperature

Zhang, Dongzhi; Wu, Zhengfang; Li, Peng; Zong, Xiaoqi; Dong, Guokang; Zhang, Yong

doi:10.1016/j.snb.2017.11.168

Cited by 152 publications

(82 citation statements)

References 64 publications

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“…If the PANI’s sensing characteristic is changed to n-type, p-n heterojunctions are formed by the addition of material, which acts as p-type (electron acceptor), e.g., carbon nanotubes [ 35 ]. As a result, ultra-low detection limits (0.25 ppb at 60% RH and RT [ 50 ], 0.25 ppb [ 33 ] and <16 ppb [ 34 ] at RT with humidity compensation) can be achieved. In contrast, this work is based on pure PANI with the simplest dopant (HCl) and no additional nanomaterial.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, the calculated response time for the presented system is over-estimated and is probably much shorter. Regarding the PANI's conductivity and sensing performance, the addition of an appropriate nanomaterial, i.e., electron donors or acceptors, in the form of metal, metal oxide nanoparticles or carbon nanotubes, enhances the conductivity due to the p-n heterojunction at the interface between the p-type PANI and n-type nanoparticles [33,34,50]. If the PANI's sensing characteristic is changed to n-type, p-n heterojunctions are formed by the addition of material, which acts as p-type (electron acceptor), e.g., carbon nanotubes [35].…”

Section: Nh 3 -Sensing Performance Of the Pani-au-spementioning

confidence: 99%

“…In order to enhance PANI;s conductivity, its switching abilities, and its morphological and structural properties that consequently influence the response to NH 3 [ 5 , 6 ], many different formulations have been developed. They range from using pure PANI with simple dopants such as HClO 4 [ 29 ] or polymers (polyurethane [ 30 ], poly(methyl methacrylate) [ 31 ]), in addition to more complex dopants (dodecylbenzenesulfonic acid (DBSA), camphorsulfonic acid (CSA)) [ 8 ] or nanomaterials such as carbon nanotubes [ 21 , 32 , 33 ] and metal particles [ 5 , 33 ] or metal oxides [ 9 , 34 , 35 ]).…”

Section: Introductionmentioning

confidence: 99%

“…By combining a knowledge of resistivity-based gas sensing and electrochemistry, we focused our work on developing a NH 3 -detection system based on electrochemically synthesised “pure” PANI without the use of any complex dopants [ 29 , 30 , 31 ] and nanomaterials [ 5 , 21 , 32 , 33 , 49 , 50 ]. PANI was chosen because of its superior sensing performance with regard to ammonia [ 6 , 51 ].…”

Section: Introductionmentioning

confidence: 99%

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Facile Fabrication of an Ammonia-Gas Sensor Using Electrochemically Synthesised Polyaniline on Commercial Screen-Printed Three-Electrode Systems

Korent

Soderžnik

Šturm

et al. 2020

Sensors

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Polyaniline (PANI) is a conducting polymer, widely used in gas-sensing applications. Due to its classification as a semiconductor, PANI is also used to detect reducing ammonia gas (NH3), which is a well-known and studied topic. However, easier, cheaper and more straightforward procedures for sensor fabrication are still the subject of much research. In the presented work, we describe a novel, more controllable, synthesis approach to creating NH3 PANI-based receptor elements. The PANI was electrochemically deposited via cyclic voltammetry (CV) on screen-printed electrodes (SPEs). The morphology, composition and surface of the deposited PANI layer on the Au electrode were characterised with electron microscopy, Fourier-transform infrared spectroscopy and profilometry. Prior to the gas-chamber measurement, the SPE was suitably modified by Au sputtering the individual connections between the three-electrode system, thus showing a feasible way of converting a conventional three-electrode electrochemical SPE system into a two-electrode NH3-gas detecting system. The feasibility of the gas measurements’ characterisation was improved using the gas analyser. The gas-sensing ability of the PANI-Au-SPE was studied in the range 32–1100 ppb of NH3, and the sensor performed well in terms of repeatability, reproducibility and sensitivity.

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Section: Resultsmentioning

confidence: 99%

Section: Nh 3 -Sensing Performance Of the Pani-au-spementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Facile Fabrication of an Ammonia-Gas Sensor Using Electrochemically Synthesised Polyaniline on Commercial Screen-Printed Three-Electrode Systems

Korent

Soderžnik

Šturm

et al. 2020

Sensors

View full text Add to dashboard Cite

show abstract

“…Since the sensitivity was still low in the aforementioned method, the development of nanomaterials with high surface to volume ratio is indispensable, which results in high sensitivity, selectivity and stability 10,11 . The polymer-nanotubes/nanorods composites synthesized by template-based self-assembly process were used for effective sensing applications 12 . The clad modified fiber-optic gas sensors with Ce, Li and Al-doped nanocrystalline ZnO were developed for room temperature sensing of ammonia, methanol and ethanol 13 .…”

Section: Introductionmentioning

confidence: 99%

Freestanding flexible, pure and composite form of reduced graphene oxide paper for ammonia vapor sensing

Selvakumar

Sivaram

Alsalme

et al. 2019

Sci Rep

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Metal oxides based graphene nanocomposites were used for ammonia vapour sensing. The self-assembly process was adopted to prepare freestanding flexible pure rGO, CeO 2 -rGO and SnO 2 -rGO composite papers. The structural studies confirmed the formation of rGO composite papers. The ammonia vapor sensing was demonstrated using an impedance analyzer at different humidity levels as well as concentration. The CeO 2 -rGO composite paper achieved a sensitivity of 51.70 ± 1.2%, which was higher than that of pure rGO and SnO 2 -rGO composite paper. Both the surfaces (top and bottom) of the papers are active in efficiently sensing ammonia, which makes the present work unique. The results reveal that metal oxide/rGO papers can be effectively utilized in real time sensor application.

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Electroanalytical Methods Based on Hybrid Nanomaterials

Yáñez‐Sedeño

Villalonga

Pingarrón

2019

Encyclopedia of Analytical Chemistry

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Hybrid nanomaterials, defined as intentional combination of at least one nanomaterial with one or more materials, at an atomic or nanometer‐level of mixture, complementing each other to have new or improved functions and properties which component materials do not possess, provide new possibilities for electroanalytical methods The relevant functional properties of nanomaterials can be tuned, in an unimaginable fashion, by rational combination with other materials. This fact opens an exciting door for sensor and biosensor technology, which is well supported by the advances in other areas such as surface science, organic and inorganic synthesis, polymer and biomolecular chemistry, and nanotechnology. This article provides a general sight state‐of‐the‐art on the use of nanosized hybrid materials as transduction, amplification, and labeling elements for the development of original electroanalytical methods, exemplifying with some of the most relevant research published in the last 5 years. The article is divided into two main sections: (i) electrochemical sensors based on hybrid nanomaterials of inorganic–organic, inorganic–inorganic, and organic–organic composition; (ii) electrochemical enzyme and affinity biosensors making use of hybrid nanostructures.

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Facile fabrication of polyaniline/multi-walled carbon nanotubes/molybdenum disulfide ternary nanocomposite and its high-performance ammonia-sensing at room temperature

Cited by 152 publications

References 64 publications

Facile Fabrication of an Ammonia-Gas Sensor Using Electrochemically Synthesised Polyaniline on Commercial Screen-Printed Three-Electrode Systems

Facile Fabrication of an Ammonia-Gas Sensor Using Electrochemically Synthesised Polyaniline on Commercial Screen-Printed Three-Electrode Systems

Freestanding flexible, pure and composite form of reduced graphene oxide paper for ammonia vapor sensing

Electroanalytical Methods Based on Hybrid Nanomaterials

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