Sulfur Dioxide (SO2) Detection Using Composite of Nickel Benzene Carboxylic (Ni3BTC2) and OH-Functionalized Single Walled Carbon Nanotubes (OH-SWNTs)

Abstract

(2020) Sulfur Dioxide (SO 2) Detection Using Composite of Nickel Benzene Carboxylic (Ni 3 BTC 2) and OH-Functionalized Single Walled Carbon Nanotubes (OH-SWNTs).

Application of Metal-Organic Framework-Based Composites for Gas Sensing and Effects of Synthesis Strategies on Gas-Sensitive Performance

“…It has been reported that single-walled carbon nanotubes can serve as a robust backbone for the uniform growth of Ni-MOF and provide excellent electrical conductivity using a solvothermal method [174]. Ingle et al [136] combined Nickel Benzene Carboxylic (Ni 3 BTC 2 ) with OH-Functionalized Single-Walled Carbon Nanotubes (OH-SWNTs), and the complexes showed the p-type. The addition of OH-SWNTs resulted in the formation of a micro-network in the MOF that facilitates charge transfer, thus enhancing the conductivity and sensing performance.…”

“…Moreover, carbon nanotubes (SWNTs) are also an excellent framework and conductive surface of some MOFs, which can form electron transmission channels in MOF to improve the conductivity. The functional groups at the outer side and tip of SWNTs provide active channels for chemical reactions, thus improving the sensitivity and repeatability of composite materials for gas molecule detection [134,136,174].…”

Nanostructured Gas Sensors: From Air Quality and Environmental Monitoring to Healthcare and Medical Applications

“…SO 2 is another air quality indicator listed in Air Quality Guidelines by the WHO [ 20 ], with a threshold limit of 5 ppm for human exposure and a long-term exposure limit of only 2 ppm [ 32 , 33 ]. It is a highly toxic gas with a pungent, irritating, and rotten smell.…”

“…It is a highly toxic gas with a pungent, irritating, and rotten smell. Natural phenomena such as volcanic eruptions, degradation of organic waste matter and hot springs, or human activities including burning of fossil fuels, metallurgical processing of pyrite and sulfide ores, etc., can result in releasing SO 2 gas molecules into the atmosphere [ 1 , 33 ]. Inhalation of SO 2 gas can seriously affect human health including irritation in respiratory tracts and eyes, bronchitis, asthma, permanent pulmonary impairment, and lung cancer [ 19 ].…”

“…Despite significant progress in developing chemiresistive metal-oxide semiconductor-based gas sensors for SO 2 gas detection, irreversible reactions between SO 2 gas molecules and metal oxide sensing materials hinder their room temperature application as a prolonged UV irradiation and heating process is required to recover the sensor to the baseline. Using a solvothermal fabrication technique, Nikesh et al [ 33 ] developed a p-type field effect transistor (FET) based on a nanocomposite made of nickel benzene carboxylic (Ni 3 BTC 2 ) and OH-functionalized single-walled carbon nanotube (OH-SWNTs) for reversable detection of SO 2 gas (4–20 ppm) at room temperature. However, further investigation is required to fully understand the sensing mechanism and the reversibility of such nanocomposites.…”