Exposed edges of porous ultrathin WO3 nanosheets determined High-performance sensing for hydrogen sulfide

Real-time methods of hydrogen sulfide detection

“…The authors of [56] made a MO hydrogen sulfide sensor with a gas-sensitive layer based on a porous two-dimensional nano-sheet made of WO 3 with a structure shifted for hydrogen sulfide detection. Different gases were used in the study, including H 2 S at a concentration of 2 ppm at an operating temperature of the sensor of 160 • C. This type of structure allows a 17-fold increase in sensitivity compared to the non-porous structure.…”

Pd-Modified LaFeO3 as a High-Efficiency Gas-Sensing Material for H2S Gas Detection

“…Some MOSs have excellent responses to gases, such as LaFeO 3 [ 13 , 14 , 15 , 16 ], SmFeO 3 [ 17 , 18 , 19 , 20 , 21 ], PrFeO 3 [ 22 , 23 ], HoFeO 3 [ 24 ], NdFeO 3 [ 25 ], YCoO 3 [ 26 ], BaSnO 3 [ 27 ], ZnSnO 3 [ 28 ] and YMnO 3 [ 29 ]. For H 2 S, the gas-sensing materials are as follows: Pt–ZnO [ 30 ], Pd–ZnO [ 31 ], CuO/SnO 2 [ 32 ], Pt–WO 3 [ 33 ], WO 3 [ 34 , 35 , 36 ], Pt–Fe 2 O 3 [ 37 ], CuO/CuFe 2 O 4 [ 38 ], Ag–SnO 2 [ 39 ], YMnO 3 [ 29 ], Sn–NiO [ 40 ], Au–SnO 2 [ 41 ], Co 3 O 4 [ 42 ], Pt–SnO 2 [ 43 ], Ag–TiO 2 [ 44 ],WO 3 [ 45 ], Au–ZnO [ 46 ], ZnO/ZnSe [ 47 ], Pt–ZnO [ 48 ], CoFe 2 O 4 [ 49 ], Pt–Zn 2 SnO 4 [ 50 ], etc. MOSs, especially Pd–LaFeO 3 perovskite materials, have the unique advantages of large specific surface areas and abundant active sites, which can promote the diffusion path and increase the adsorption of target gas molecules, thereby enhancing their sensing abilities.…”

Au modified PrFeO3 with hollow tubular structure can be efficient sensing material for H2S detection

“…It has been reported that some MOSs, as gas-sensing materials, show excellent response to gases, such as LaFeO 3 ( Xiangfeng and Siciliano, 2003 ; Song et al, 2014 ; Jaouali et al, 2018 ; Ma et al, 2021 ), SmFeO 3 ( Tomoda et al, 2004 ; Hosoya et al, 2005 ; Huang et al, 2018 ; Han et al, 2020 ), PrFeO 3 ( Ma et al, 2018 ), HoFeO 3 ( Song et al, 2020 ), NdFeO 3 ( Sheng et al, 2022 ), YCoO 3 ( Addabbo et al, 2015 ), BaSnO 3 ( Cerdà et al, 2002 ), ZnSnO 3 ( Yin et al, 2020 ), and YMnO 3 ( Balamurugan and Lee, 2015 ). For H 2 S, commonly used gas-sensing materials include Pt–ZnO ( Zhou et al, 2022 ), Pd–ZnO ( Bae et al, 2022 ), CuO/SnO 2 ( Fan et al, 2019 ), Pt–WO 3 ( Yao et al, 2022 ), WO 3 ( Wang et al, 2018 ; Akamatsu et al, 2021 ; Li et al, 2022b ), Pt–Fe 2 O 3 ( Guo et al, 2018 ), CuO/CuFe 2 O 4 ( Lim et al, 2021 ), Ag–SnO 2 ( Senapati and Sahu, 2020 ), LaFeO 3 ( Xiangfeng and Siciliano, 2003 ), YMnO 3 ( Balamurugan and Lee, 2015 ), and Sn–NiO ( Gao et al, 2017 ), among others. MOSs—especially ABO 3 perovskite materials—have the unique advantages of large specific surface area and abundant active sites, which can promote the diffusion path and increase the adsorption of target gas molecules, thus enhancing the sensing ability.…”