Pt and black phosphorus co-modified flower-like WS₂ composites for fast NO₂ gas detection at low temperature

Abstract

Incomplete recovery, baseline drift, and long response time have been impeding the practical applications of transition metal dichalcogenides (TMDs)-based gas sensors. Here, we display the WS2 sensors with significantly improved...

Fabrication of a room-temperature NO2 gas sensor with high performance at the ppb level using an rGO/BiOCl heterostructure

“…20,21 When combined with rGO, several common metal oxides, including ZnO, SnO 2 , WO 3 and CuO, demonstrated improved gas sensing capabilities compared to base metal oxides. [22][23][24][25] Despite this, the non-uniform hybridization between rGO and metal oxides leads to a ring-like deposition because particles are concentrated on droplet edges as a result of the coffee ring effect. 26,27 Consequently, the sensitivity and repeatability of the manufactured sensors are severely reduced.…”

NO2 Sensor Based on WS2/SnSe2 Heterojunction Microflowers

“…On one hand, photoexcitation has been shown to be a considerable means to enhance the sensing performance of room-temperature TMDs-based NO 2 , as photogenerated carriers can participate in gas adsorption/desorption and electron transfer. On the other hand, the gas response and rate can be improved by doping TMD nanosheets with other sensing materials to form heterostructures, such as metal oxide semiconductors, 2D materials, and graphene. , Take SnSe 2 as an example, it is an n-type 2D material with superior electrical properties and larger specific surface area that has been studied for resistive gas sensors . Zhao et al prepared bimetallic Au@Pt core–shell nanospheres (BNSs) and functionalized electrospun ZnFe 2 O 4 nanofibers (ZFO NFs); compared with the pure NFS-650 analogue, the ZFO NFs/BNSs-2 sensor has a stronger average response (3.32 vs 1.84) faster response/recovery speed (3/28 s vs 54/42 s).…”