Indium-doping-induced selenium vacancy engineering of layered tin diselenide for improving room-temperature sulfur dioxide gas sensing

Abstract

Layered metal dichalcogenides (LMDs) are promising gas-sensing materials due to their high specific surface area and satisfactory electrical conductivity. However, virgin LMDs-based gas sensors have several performance constraints, including low...

Dual regulation of hierarchical porosity and heterogeneous interfaces in Cu-BTC/Bi2MoO6 for thermally-driven and UV-light-activated selective acetone sensing

“…Air pollution has become a real concern in today's world, which stems from extensive vehicular and industrial emissions as well as anthropogenic activities. In addition to common primary pollutants such as the typical NO x , CO, and SO 2 , 1–3 volatile organic compounds (VOCs), serving as crucial precursors of secondary aerosols (SO 4 2− ), fine particulate matter (PM 2.5), and ozone (O 3 ) are generally the primary source of environmental problems. 4 Particularly, the monitoring of toxic VOCs, led by acetone, has gained widespread attention as VOCs cause depletion of the ozone layer and their air leaks or inhalation can harm the environment and human health.…”

Dual Improvement in Sensitivity and Humidity Tolerance of a NO2 Sensor Based on 3-Aminopropyltriethoxysilane Self-Assembled Monolayer-Functionalized SnSe2 for Explosive Photolysis Gas Detection

“…On the other hand, sensors made from pristine SnSe 2 typically have a limited response and incomplete recovery . Some reported techniques for improving the performance of gas sensors based on SnSe 2 include heterojunction construction, noble metal modification, and elemental doping . However, they are challenging to mass-produce due to their complicated operation, high cost, and harsh reaction conditions.…”

“…25 Some reported techniques for improving the performance of gas sensors based on SnSe 2 include heterojunction construction, 26 noble metal modification, 23 and elemental doping. 27 However, they are challenging to massproduce due to their complicated operation, high cost, and harsh reaction conditions. Self-assembled monolayers (SAMs) are a kind of structurally stable molecular aggregates or supramolecular structures that spontaneously form through specialized intermolecular interactions and have a particular set of features.…”

Solution-processed In2Se3 nanosheets for ultrasensitive and highly selective NO2 gas sensors

“…[6][7][8][9][10] These sensors are popular, due to their small size and easy operation mechanism, whereby changes in electrical parameters of metal oxides are used as a sensing signal, based on the adsorption of gas molecules on their surface. [6][7][8][11][12][13][14][15][16][17][18] However, to ensure high sensitivity, the sticking coefficient for the adsorption of gases on their surface should be maximized, while keeping the absolute value of the adsorption energy not too high to ensure adsorption/desorption of analytes. Moreover, the presence of different gaseous and volatile organic compounds in the air can cause variations in the conductance (or resistance) of metal oxides, affecting their selectivity to a specic analyte.…”