Highly sensitive methanol chemical sensor based on undoped silver oxide nanoparticles prepared by a solution method

Rahman, Mohammed M.; Khan, Sher Bahadar; Jamal, Aslam; Faisal, M.; Asiri, Abdullah M.

doi:10.1007/s00604-012-0817-2

Cited by 100 publications

(36 citation statements)

References 35 publications

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“…The higher sensitivity of the fabricated PAAP/GCE could be attributed to the excellent absorption (porous surfaces in PAAP/Nafion/GCE) and adsorption ability and high catalytic-activity of branches derivative of PAAP. The estimated sensitivity of the fabricated sensor is relatively higher and detection limit is comparatively lower than previously reported cationic sensors based on other nano-composites or nano-materials modified electrodes measured by I-V systems [63–66]. Due to high specific surface area, PAAP provides a favorable nano-environment for the As 3+ detection with good quantity.…”

Section: Resultsmentioning

confidence: 84%

Thermally stable hybrid polyarylidene(azomethine-ether)s polymers (PAAP): an ultrasensitive arsenic(III) sensor approach

Rahman

Hussein

Aly

et al. 2018

Designed Monomers and Polymers

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A new category of thermally stable hybrid polyarylidene(azomethine-ether)s and copolyarylidene(azomethine-ether)s (PAAP) based on diarylidenecycloalkanones has been synthesized using solution polycondensation method. For potential cationic sensor development, a thin layer of PAAP onto a flat glassy carbon electrode (GCE, surface area: 0.0316 cm2) was prepared with conducting nafion (5%) coating agent to fabricate a sensitive and selective arsenic (III) [As3+] ion in short response time in neutral buffer system. The fabricated cationic sensor was measured the analytical performances such as higher sensitivity, linear dynamic range, detection limit, reproducibility, and long-term stability towards As3+ ions. The sensitivity and detection limit were calculated as 2.714 μAμM−1cm−2 and 6.8 ± 0.1 nM (SNR of 3; 3N/S) respectively from the calibration curve. This novel approach can be initiated a well-organized route of an efficient development of heavy selective arsenic sensor for hazardous pollutants in biological, environmental, and health care fields. Real sample analysis for various environmental sample was performed with PAAP-modified-GCE.

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Section: Resultsmentioning

confidence: 84%

Thermally stable hybrid polyarylidene(azomethine-ether)s polymers (PAAP): an ultrasensitive arsenic(III) sensor approach

Rahman

Hussein

Aly

et al. 2018

Designed Monomers and Polymers

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“…The higher sensitivity of the fabricated PANI@Bi 2 O 3 nanorice/ AgE could be attributed to the excellent absorption (porous surfaces in PANI@Bi 2 O 3 nanorice/binders/AgE) and adsorption ability, high catalytic decomposition activity and good biocompatibility of the PANI@Bi 2 O 3 nanorices. The estimated sensitivity of the fabricated sensor is relatively higher, and detection limit is comparatively lower than that of previously reported chemical sensors based on other nanocomposite-or nanomaterial-modified electrodes measured by I-V systems [41][42][43][44]. Due to high specific surface area, PANI@Bi 2 O 3 nanorice provides a favorable microenvironment for the 3-methoxy phenol detection with good quantity.…”

Section: Application: 3-methoxy Phenol Detection By Pani@bi 2 O 3 Nanmentioning

confidence: 82%

Toward designing efficient rice-shaped polyaniline@bismuth oxide nanocomposites for sensor application

Khan

Rahman

et al. 2015

J Sol-Gel Sci Technol

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Efficient rice-shaped polyaniline@bismuth oxide (PANI@Bi 2 O 3 ) nanocomposites were synthesized by in situ sol-gel method. The sol of polyaniline was added to the gel of Bi 2 O 3 in different mixing volume ratios of inorganic reactant and with a fixed mixing volume ratio, i.e., 1:1, of organic polymer. The physicochemical characterization was carried out by SEM, XRD, FTIR, UV-Vis and simultaneous TGA studies. PANI@Bi 2 O 3 were deposited on a silver electrode (AgE, surface area, 0.0216 cm 2 ) to give an efficient sensor with a fast response toward the toxic 3-methoxy phenol in liquid phase. The calibration plot is linear (r 2 = 0.9809) over the 0.09 nM to 0.09 mM 3-methoxy phenol concentration ranges. The sensitivity is *0.8796 lAcm -2 lM -1 , and the detection limit is 0.016 ± 0.002 nM (signal-to-noise ratio, at a SNR of 3), which leads to a promising future sensitive sensor development using organic-inorganic nanocomposites by reliable I-V method for the potential applications of hazardous phenolic compounds in environmental and healthcare fields.Graphical Abstract Schematic diagram for the synthesis of rice-shaped polyaniline@Bi 2 O 3 nanocomposite.

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“…Due to its excellent chemical and physical properties, titanium dioxide (TiO 2 ), especially its forms with nanoporous structures, has been widely used in the application of photocatalysts, solar cells, gas sensors and self-cleaning components [1][2][3]. Among the various applications of TiO 2 , gas sensors have attracted considerable attention because of their good electrochemical stability and high sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Conductometric sensor for ammonia and ethanol using gold nanoparticle-doped mesoporous TiO2

Xiong

Liu

2015

Microchim Acta

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We describe uniform and high-temperature-stable mesoporous TiO 2 beads functionalized with gold nanoparticles (AuNPs-TiO 2 ) for use in conductometric sensing of gases and organic vapors. The size of the interconnected main mesopores of the TiO 2 beads ranges from 8 to 15 nm, and the AuNPs have diameters between 8 and 10 nm. The mesoporous TiO 2 beads are formed during calcination while the structure-directing template agent is removed. Monodispersed AuNPs are formed by reduction in-situ and are placed inside the mesoporous TiO 2 framework. This prevents aggregation of the AuNPs even at 500°C. The materials were characterized by UV-vis spectroscopy, scanning and transmission electron microscopy, nitrogen adsorption-desorption, and X-ray diffraction. Comb-type gold electrodes were then fabricated on an alumina substrate and are shown to display excellent properties in terms of sensing ammonia, ethanol, methanol or acetone. The sensitivity (defined as the ratio of resistivities under vapor and air) of a typical AuNPs(0.5 %)-TiO 2 gas sensor for ethanol reached up to 5.65 at above 600 ppm at 75°C. Response time and recovery times (t 90 ≤20 s) are faster than (or comparable to) other metal-doped TiO 2 sensors, and working temperatures are much lower. An interesting observation was made in that the changes in the conductivity of the sensor change with temperature. The sensor prepared with AuNPs(0.5 %)-TiO 2 is of the p-type (in its response to ammonia gas) at 45°C, but becomes n-type at 20°C. Obviously, rather slight changes in temperature lead to a complete change in the direction of the conductometric signal change. This may provide a new aspect in terms of selective and highly sensitive detection of ammonia at ambient and slightly elevated temperatures.

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Highly sensitive methanol chemical sensor based on undoped silver oxide nanoparticles prepared by a solution method

Cited by 100 publications

References 35 publications

Thermally stable hybrid polyarylidene(azomethine-ether)s polymers (PAAP): an ultrasensitive arsenic(III) sensor approach

Thermally stable hybrid polyarylidene(azomethine-ether)s polymers (PAAP): an ultrasensitive arsenic(III) sensor approach

Toward designing efficient rice-shaped polyaniline@bismuth oxide nanocomposites for sensor application

Conductometric sensor for ammonia and ethanol using gold nanoparticle-doped mesoporous TiO2

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