Selective detection of chlorine at room temperature utilizing single-walled carbon nanotubes functionalized with platinum nanoparticles synthesized via ultraviolet irradiation

Choi, Sun‐Woo; Kim, Byung-Moon; Oh, Sangsuk; Byun, Young Tae

doi:10.1016/j.snb.2017.04.119

Cited by 23 publications

(7 citation statements)

References 36 publications

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“…Similarly, Choi et al fabricated sensors in which the Pt− nanoparticles were grafted directly on the sidewalls of the CNTs. 645 Their sensors showed excellent long-term stability with a 10.3% change in resistance for 1 ppm of Cl 2 for newly fabricated sensors that is retained after storing under humid conditions for 6 months. Sharma et al reported a chemiresistive sensor containing CNT/zinc phthalocyanine composites that displayed an increase in conductance upon exposure to Cl 2 .…”

Section: Chemical Reviewsmentioning

confidence: 92%

“…Similarly, Choi et al. fabricated sensors in which the Pt–nanoparticles were grafted directly on the sidewalls of the CNTs . Their sensors showed excellent long-term stability with a 10.3% change in resistance for 1 ppm of Cl 2 for newly fabricated sensors that is retained after storing under humid conditions for 6 months.…”

Section: Cnt-based Sensors For National Securitymentioning

confidence: 99%

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Carbon Nanotube Chemical Sensors

et al. 2018

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Carbon nanotubes (CNTs) promise to advance a number of real-world technologies. Of these applications, they are particularly attractive for uses in chemical sensors for environmental and health monitoring. However, chemical sensors based on CNTs are often lacking in selectivity, and the elucidation of their sensing mechanisms remains challenging. This review is a comprehensive description of the parameters that give rise to the sensing capabilities of CNT-based sensors and the application of CNT-based devices in chemical sensing. This review begins with the discussion of the sensing mechanisms in CNT-based devices, the chemical methods of CNT functionalization, architectures of sensors, performance parameters, and theoretical models used to describe CNT sensors. It then discusses the expansive applications of CNT-based sensors to multiple areas including environmental monitoring, food and agriculture applications, biological sensors, and national security. The discussion of each analyte focuses on the strategies used to impart selectivity and the molecular interactions between the selector and the analyte. Finally, the review concludes with a brief outlook over future developments in the field of chemical sensors and their prospects for commercialization.

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Section: Chemical Reviewsmentioning

confidence: 92%

Section: Cnt-based Sensors For National Securitymentioning

confidence: 99%

Carbon Nanotube Chemical Sensors

et al. 2018

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“…Gas sensors using carbon-based nanomaterials (e.g., single-walled carbon nanotubes (SWCNTs) [ 5 , 15 , 16 , 17 , 18 , 19 , 20 ], multi-walled carbon nanotubes (MWCNTs) [ 3 , 21 ], graphene [ 22 , 23 ], graphene oxide (GO) [ 24 ], and reduced GO (R-GO)) show desirable properties, such as a high response, detectability of low concentrations, low temperature operations, etc., making them highly attractive as platform materials. However, they still have limitations, such as a low selectivity and long response and recovery times compared to metal oxide- or CP-based sensors [ 25 , 26 , 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

“…However, they still have limitations, such as a low selectivity and long response and recovery times compared to metal oxide- or CP-based sensors [ 25 , 26 , 27 , 28 ]. Regarding these issues, there have been some results improved by surface treatments [ 16 , 29 , 30 ], functionalization [ 19 , 31 , 32 , 33 ], the use of core-shell structures [ 34 , 35 ], specially designed hetero-structures [ 36 , 37 ], etc.…”

Section: Introductionmentioning

confidence: 99%

Negatively-Doped Single-Walled Carbon Nanotubes Decorated with Carbon Dots for Highly Selective NO2 Detection

2020

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In this study, we demonstrated a highly selective chemiresistive-type NO2 gas sensor using facilely prepared carbon dot (CD)-decorated single-walled carbon nanotubes (SWCNTs). The CD-decorated SWCNT suspension was characterized using transmission electron microscopy (TEM), X-ray diffraction (XRD), and UV-visible spectroscopy, and then spread onto an SiO2/Si substrate by a simple and cost-effective spray-printing method. Interestingly, the resistance of our sensor increased upon exposure to NO2 gas, which was contrary to findings previously reported for SWCNT-based NO2 gas sensors. This is because SWCNTs are strongly doped by the electron-rich CDs to change the polarity from p-type to n-type. In addition, the CDs to SWCNTs ratio in the active suspension was critical in determining the response values of gas sensors; here, the 2:1 device showed the highest value of 42.0% in a sensing test using 4.5 ppm NO2 gas. Furthermore, the sensor selectively responded to NO2 gas (response ~15%), and to other gases very faintly (NO, response ~1%) or not at all (CO, C6H6, and C7H8). We propose a reasonable mechanism of the CD-decorated SWCNT-based sensor for NO2 sensing, and expect that our results can be combined with those of other researches to improve various device performances, as well as for NO2 sensor applications.

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“…Two major categories of sensors have been developed for gaseous chlorine detection, including solid-state electrochemical sensors and colorimetric sensors. The solid-state electrochemical chlorine sensors are either based on the potentiometric principle or conductometric principle. − The reported potentiometric chlorine sensors employed chloride salt-based solid electrolytes with robust and compacted embodiments, fast response time (<1 min), and high sensitivity (<1 ppm) at high operational temperatures (≥300 °C). − To date, a sensor reported by Zhang and co-workers is the best performed potentiometric chlorine sensor . Under an operational temperature of 300 °C, their sensor can readily determine gaseous chlorine within a concentration ranging from 0.1 to 20 ppm in a rapid manner (analytical time, 20 s; recovery time, 25 s).…”

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confidence: 99%

Membrane-Based Portable Colorimetric Gaseous Chlorine Sensing Probe

Ming

Xing

et al. 2020

Anal. Chem.

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Highly toxic chlorine gas imposes serious health risks in the workplace. The ability to on-site, real-time monitoring of instantaneous and time-weighted average (TWA) chlorine gas concentrations in a simple, sensitive, accurate, and reliable manner would be highly beneficial to improve workplace health and safety. Here, we propose and experimentally validate a gaseous chlorine detection principle based on a N,N-diethyl-p-phenylenediamine sulfate salt/Cl2 colorimetric reaction-controlled membrane process to regulate the gaseous chlorine transport across a gas-permeable membrane that enables the establishment of a time-resolved analytical relationship to quantify chlorine concentration by multidata points with dramatically enhanced accuracy and reliability. A gas-permeable membrane-based portable colorimetric gaseous chlorine sensing probe (MCSP) was designed and fabricated. The MCSP embedded the proposed analytical principle that is capable of real-time continuous monitoring of the instantaneous and TWA chlorine gas concentrations within an analytical range of 0.009–2.058 mg L–1 without the need for on-going calibration, which could be a useful analytical tool for managing the toxic chlorine gas-imposed health risks in workplaces.

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Selective detection of chlorine at room temperature utilizing single-walled carbon nanotubes functionalized with platinum nanoparticles synthesized via ultraviolet irradiation

Cited by 23 publications

References 36 publications

Carbon Nanotube Chemical Sensors

Carbon Nanotube Chemical Sensors

Negatively-Doped Single-Walled Carbon Nanotubes Decorated with Carbon Dots for Highly Selective NO2 Detection

Membrane-Based Portable Colorimetric Gaseous Chlorine Sensing Probe

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