Polyaniline-Functionalized Nanofibers for Colorimetric Detection of HCl Vapor

Thornton, Breland T. E.; Harrison, Andrew; Pham, Amanda L.; Castano, Carlos E.; Tang, Christina

doi:10.1021/acsomega.8b00054

Cited by 32 publications

(32 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although metal oxide semiconductors gas sensors, which are commonly used in the detection of CO and NH 3 gases, bene t from high metarial sensitivity and quick response time, they generally operate at high temperatures (200-300 0 C) [8][9][10][11][12][13][14][15]. Recently, researchers have focused on improving the operation conditions of gas sensors in terms of low-level CO detection at room temperature [16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

β12 Phase Borophene Enhanced PANI Gas Sensor for CO and NH3 Detection

Taşaltın¹,

Taşaltın²,

Baytemir³

et al. 2021

Preprint

View full text Add to dashboard Cite

In cases where the carbon monoxide concentration reaches to 50 ppm, and ammonia concentration reaches to 25 ppm in indoor ambient, the symptoms such as lung failure, heart failure, brain damage are present, and urgent medical attention is required. Therefore, the development of a rapid and sensitive sensor in order to detect the level of CO and NH3 gases is the critical issue for health and the environment. In this study, borophene nanosheets with the β12 phased crystalline structure are produced by ultrasonic sonication. Using borophene nanosheets, Borophene and PANI: Borophene sensors are fabricated to investigate the CO and NH3 gas detection at room temperature. It has been observed that borophene enhances the CO and NH3 gas detection performance of PANI. The results reveal that borophene sensor detected 6 ppm CO gas with 30 s response time and 40 s recovery time, and 50 ppb NH3 gas with 40 s response time and 60 s recovery time at room temperature. On the other hand, PANI: Borophene sensor detected 6 ppm CO gas with 300 s response time and 320 s recovery time and 50 ppb NH3 gas with 100 s response time and 120 s recovery time at room temperature.

show abstract

Section: Introductionmentioning

confidence: 99%

β12 Phase Borophene Enhanced PANI Gas Sensor for CO and NH3 Detection

Taşaltın¹,

Taşaltın²,

Baytemir³

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…The working principle of such colorimetric sensors is based on color changes by various mechanisms such as photochromism (light), electrochromism (oxidation/reduction), thermochromism (heat), solvatochromism (solvent polarity), ionochromism (ions), and halochromism (pH) [ 10 ]. Up until now, numerous colorimetric sensors in the form of films [ 3 , 17 ], aerogel [ 4 , 18 ], nanofibers [ 19 ], and fabrics [ 20 ] were investigated to detect various hazardous gases such as ammonia [ 2 , 3 , 4 , 21 ], phosgene [ 22 ], hydrogen sulfide [ 23 ], and volatile organic compounds (VOCs) [ 18 ]. Khattab et al reported that the cotton biosensor fabric coated with alginate capsulated with the protonated tricyanofuran hydrazine anion detected the urease enzymatic activity and showed the color change from light yellow to purple [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Washable Colorimetric Nanofiber Nonwoven for Ammonia Gas Detection

Yeang

Park³

et al. 2020

Polymers

View full text Add to dashboard Cite

The colorimetric sensor is a facile, cost-effective, and non-power-operated green energy material for gas detection. In this study, the colorimetric sensing property of a meta-aramid/dye 3 nanofiber sensor for ammonia (NH3) gas detection was investigated. This colorimetric sensor was prepared using various dye 3 concentrations via electrospinning. Morphological, thermal, structural, and mechanical analyses of the sensor were carried out by field-emission scanning electron microscopy, thermogravimetric analysis, Fourier-transform infrared spectroscopy, and a universal testing machine, respectively. A homemade computer color matching machine connected with a gas flow device characterized the response of the meta-aramid/dye 3 nanofiber colorimetric sensor to various exposure levels of NH3 gas. From the results, we confirmed that this colorimetric green energy sensor could detect ammonia gas in the concentration of 1–10 ppm with a sensing response time of 10 s at room temperature. After washing with laundry detergent for 30 min, the colorimetric sensors still exhibited sensing property and reversibility.

show abstract

“…It is widely accepted that the sensitivity of a sensor that detects analytes by interaction on the surface, will increase with increasing surface area per mass unit [10]. Nanofibers properties enhance the interaction with analytes in the gas phase such as volatile organic compounds (VOC) [11] and hydrogen chloride (HCl) [12]. There is a variety of colorimetric sensors based on nanofibers described in the literature that detect some analytes in aqueous media, including Fe 3+ and Hg 2+ [13], Cu 2+ [14], Zn 2+ [15], and Al 3+ [16].…”

Section: Introductionmentioning

confidence: 99%

Nanostructured and Photochromic Material for Environmental Detection of Metal Ions

2019

View full text Add to dashboard Cite

Compared to conventional spectroscopy or chromatography analysis, chemical sensing based on colorimetric changes offers an alternative to monitor potential metal hazards in aqueous environment through rapid and low-cost colorimetric changes which can be easily interpreted. In this work poly(ethylene glycol) (PEG 2000) was modified with a carboxylic acid spiropyran (SPCOOH) derivate by Steglich esterification (PEGSP2). PEGSP2 was incorporated into a poly(ε-caprolactone) (PCL) polymer matrix by electrospinning technique to produce nanofibers with photochromic properties. Spectroscopic analysis, thermal gravimetric analysis (TGA), and differential scanning calorimetry (DSC) were used to characterize PEGSP2. Drop shape analysis (DSA) and scanning electronic microscopy (SEM) were used to characterize the electrospun (ES) nanofibers morphology. Several metal ions solutions relevant to environmental hazards were prepared to be spotted on the surface of ES nanofibers for photochromatic sensing. Among them, Mg2+, Ca2+, Zn2+, Cd2+, La3+, and Er3+ demonstrated orange fluorescence when exposed to UV light. ES nanofibers also presented higher wettability when compared to a pure PCL polymer matrix, which is critical for sensitivity. Eighteen metals ions could be detected on the electrospun material. Additionally, among all metal ions Fe3+ was the most sensitive one in solution, in a µmol L−1 range.

show abstract

Polyaniline-Functionalized Nanofibers for Colorimetric Detection of HCl Vapor

Cited by 32 publications

References 30 publications

β12 Phase Borophene Enhanced PANI Gas Sensor for CO and NH3 Detection

β12 Phase Borophene Enhanced PANI Gas Sensor for CO and NH3 Detection

Washable Colorimetric Nanofiber Nonwoven for Ammonia Gas Detection

Nanostructured and Photochromic Material for Environmental Detection of Metal Ions

Contact Info

Product

Resources

About