Synergy of S-vacancy and heterostructure in BiOCl/Bi2S3−x boosting room-temperature NO2 sensing

A highly efficient room-temperature NO2 gas sensor based on three-dimensional core–shell structured CoS2 bridged Co3O4@MoS2

“…The gas-sensing mechanism of the three-component heterojunction Co 3 O 4 –CoS 2 @MoS 2 -2 composite is primarily attributed to the variation in resistance when exposed to a NO 2 atmosphere. 40,41 Molybdenum disulfide nanosheets have high catalytic oxidation performance and form a heterostructure with Co 3 O 4 to speed up carrier transport. At the same time, the S atom in CoS 2 has a large capacity to hold electrons, which further promotes efficient carrier transport.…”

Tailoring selenium vacancies in MoSe2 through oxygen passivation for room-temperature NO2 sensing enhancement

“…The gas-sensing properties of the sensors were measured in a homemade 4 L test box with a mixing fan as in our previous work. 50 The resistance of sensors was monitored using an electrochemical workstation (CHI660E, CH Instruments). During the test, the concentration of the target gas was controlled by the amount of gas injected into the testing chamber.…”

Sputtered Ultrathin WO3 for Realizing Room-Temperature High-Sensitive NO2 Gas Sensors

“…According to OSHA (Occupational Safety and Health Administration) of the United States Department of Labor, the level of NO 2 should be less than 5 ppm for 8 h exposure. , In 2010, the United States Environmental Protection Agency (EPA) also set the ambient air quality standards for nitrogen dioxide (NO 2 ) to be a 1-h standard at a level of 100 ppb and a long-term exposure standard at 53 ppb. , To effectively detect low concentrations of NO 2 gas, related studies have sprung up in recent years. There are many metal-oxide sensors to detect NO 2 . − However, to monitor NO 2 in our daily life, low-cost and reliable NO 2 gas sensors are still needed.…”