Construction of LaF₃ QD-modified SnS₂ nanorod composites for ultrasensitive detection of H₂S

Abstract

In this paper, LaF3 QD modified SnS2 nanorods were used to create an ultrasensitive sensor for detecting the SF6 decomposition product H2S.

Improved Ethanol Sensing Performance of α-MnO2 Nanorods at Room Temperature Enabled through PPy Embedding

“…The sensitivity of the MP50 sensor is significantly higher toward ethanol than that toward pristine MnO 2 or PPy. The sensing mechanism primarily depends on the microstructure of nanocomposites and the formation of a p–n heterojunction. , The uniform structure of the MP50 nanocomposite (Figure (c)) has obtained the highest surface area, which provides abundant pores with large active sites, thereby increasing the rate of ethanol adsorption. The resistance of the sensor changes with different gas concentrations due to the adsorption and desorption of gas molecules on the surface of the sensing material.…”

“…26 A LaF 3 −SnS 2 sensor was prepared for the real-time detection of H 2 S with a lower detection limit of 50 ppb. 27 Moreover, an n− n heterojunction-based In 2 O 3 /SnS 2 self-powered gas sensor detected ultralow concentrations of NO 2 at room temperature. 28 A self-powered Ti 3 C 2 T x MXene/WO 3 sensor achieved excellent response toward NO 2 gas at room temperature.…”

First-Principles Study on the Selective Detection of Toxic Gases by 2D Monolayer PdS2: Insight into Charge Transfer Dynamics and Alignment of Frontier Molecular Orbitals

“…In this work, we study various toxic gas molecules, including ammonia (NH 3 ), nitrous oxide (N 2 O), NO 2 , nitric oxide (NO), carbon monoxide (CO), hydrogen sulfide (H 2 S), sulfur dioxide (SO 2 ), sulfuryl fluoride (SO 2 F 2 ), and thionyl fluoride (SOF 2 ) (the last four gas molecules are decomposition products of sulfur hexafluoride (SF 6 ) , ), adsorbed on pentagonal PdS 2 monolayer by first-principles calculations. We not only identify the promising applications of monolayer PdS 2 as gas sensor material to NO 2 , NO, and SO 2 but also find that it might be a good criterion for screening suitable sensing materials by comparing the energy of the frontier molecular orbitals of the gas molecules with the band edges of the candidate adsorbent materials.…”

SnSe2/Ag2Se heterostructures with an accumulation layer for rapid and sensitive detection of NO2

“…Two-dimensional (2D) metal chalcogenides are used in various fields, such as electrocatalysts, photocatalysts, and sensors. [20][21][22][23][24][25] Especially, owing to the large surface area, high reactive activity, and outstanding carrier mobility, 2D metal chalcogenides, such as SnS 2 [26][27][28][29] and MoS 2 , 30 have been increasingly investigated for gas sensors. Compared with SnS 2 , SnSe 2 has a narrower band gap, wider layer spacing, and higher carrier mobility.…”