Optimization NH3 sensing performance manifested by gas sensor based on Pr-SnS2/ZnS hierarchical nanoflowers

Zhang, Qixian; Ma, Shenglin; Zhang, Rong; Zhu, Kaiming; Tie, Y.; Pei, Shitu

doi:10.1016/j.jallcom.2019.151650

Cited by 36 publications

(16 citation statements)

References 45 publications

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“…127 and CuO/rGO, 128 whose enhanced performances are attributed to the heterocontact of the two semiconductor surfaces. For metal sulde-based n-n and p-p heterojunctions, Zhang et al 129 optimized the NH 3 sensing behaviour by using SnS 2 /ZnS hierarchical NFWs. The gas sensors based on metal sulde n-n junctions beneting from metal oxide hybrids, such as CdS/CeO 2 , 130 CdS/ZnO, 131 ZnS/ZnO, 132 and ZnS/CuO, 133 have been employed for the detection of VOC toxic gases.…”

Section: Heterojunction Based Gas Sensorsmentioning

confidence: 99%

Recent advances in 2D/nanostructured metal sulfide-based gas sensors: mechanisms, applications, and perspectives

et al. 2020

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Section: Heterojunction Based Gas Sensorsmentioning

confidence: 99%

Recent advances in 2D/nanostructured metal sulfide-based gas sensors: mechanisms, applications, and perspectives

et al. 2020

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“…ZnS/SnS 2 heterojunctions have also been reported [ 38 , 39 , 40 , 41 , 42 , 43 ], as shown in Table 1 . However, different research groups obtained different results.…”

Section: Introductionmentioning

confidence: 99%

“…However, different research groups obtained different results. Some researchers [ 38 , 39 ] believed that ZnS/SnS 2 forms a type-Ⅰ heterojunction. The CB and VB of ZnS are respectively higher and lower than the corresponding bands of SnS 2 , and electrons and holes migrate to the CB and VB of SnS 2 .…”

Section: Introductionmentioning

confidence: 99%

Two-Dimensional ZnS/SnS2 Heterojunction as a Direct Z-Scheme Photocatalyst for Overall Water Splitting: A DFT Study

Chen

Zhao

et al. 2022

Materials

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Direct Z-scheme photocatalysts have attracted extensive attention due to their strong redox ability and efficient separation of photogenerated electron-hole pairs. In this study, we constructed two types of ZnS/SnS2 heterojunctions with different stacking models of ZnS and SnS2 layers, and investigated their structures, stabilities, and electronic and optical properties. Both types of heterojunctions are stable and are direct Z-scheme photocatalysts with band gaps of 1.87 eV and 1.79 eV, respectively. Furthermore, their oxidation and reduction potentials straddle the redox potentials of water, which makes them suitable as photocatalysts for water splitting. The built-in electric field at the heterojunction interface improves the separation of photogenerated electron-hole pairs, thus enhancing their photocatalytic efficiency. In addition, ZnS/SnS2 heterojunctions have higher carrier mobilities and light absorption intensities than ZnS and SnS2 monolayers. Therefore, the ZnS/SnS2 heterojunction has a broad application prospect as a direct Z-scheme visible-light-driven photocatalyst for overall water splitting.

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“…Polymers, carbon-based nanomaterials, metal nanostructures, and their composites are currently being used as materials for developing sensitive layers that are used in the SAW device. Graphene oxide (GO) is a promising sensitive layer for various gas sensors, owing to its attractive sp 2 -bonded nanostructure, large specific surface area, abundant oxygen-containing functional groups, and easily functionalized surface .…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, previous studies have explored sensing materials with selectivity, high adsorption, long-term stability, and reliability as sensitive layers combined with the SAW device to develop a novel sensor. 32,33 Polymers, 34 carbon-based nanomaterials, 35 metal nanostructures, 36 and their composites 37 are currently being used as materials for developing sensitive layers that are used in the SAW device. Graphene oxide (GO) is a promising sensitive layer for various gas sensors, owing to its attractive sp 2 -bonded nanostructure, large specific surface area, abundant oxygencontaining functional groups, and easily functionalized surface.…”

Section: Introductionmentioning

confidence: 99%

Surface Acoustic Wave Devices Based on Graphene Oxide/Au Nanorod Composites for Gas-Phase Detection of 2,4,6-Trinitrotoluene

Yang

Wang

Gao

et al. 2022

ACS Appl. Nano Mater.

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Surface acoustic wave (SAW) devices are extensively used to detect various gaseous chemicals, owing to their wireless passive potential and single-signal display. However, the sensitivity, selectivity, and long response time of the sensitive layers limit their use in detecting explosive gases. In this study, we developed a 2,4,6-trinitrotoluene (TNT) gas sensor based on the SAW device with GO/PDEA/AuNR/PATP nanocomposites. The GO/PDEA/AuNR/PATP-SAW sensor recorded a considerable negative frequency shift (−70.67 kHz) in detecting 80 ppm TNT at 25 °C/20 RH %, thus enabling the detection of 40 ppb to 80 ppm TNT with the limit of detection as low as 40 ppb (−3.02 kHz). Short response/recovery time (40 ppb: 6.2/11.8 s) with good cycling stability and selectivity were achieved. The high performance of the GO/PDEA/AuNR/PATP-SAW sensor is attributed to its large specific surface area, roughness, and porosity. The oxygen-containing and electron-rich amino groups of the GO/PDEA/AuNR/ PATP provide many active sites for adsorbing TNT gas. The primary sensing mechanism is the mass and electrical load of the nanocomposite in TNT gas. It has an optimum thickness of 380 nm and room temperature as the optimum operating temperature. Therefore, this study would serve as a good basis for the research and development of next-generation acoustic gas-phase explosive sensors.

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Optimization NH3 sensing performance manifested by gas sensor based on Pr-SnS2/ZnS hierarchical nanoflowers

Cited by 36 publications

References 45 publications

Recent advances in 2D/nanostructured metal sulfide-based gas sensors: mechanisms, applications, and perspectives

Recent advances in 2D/nanostructured metal sulfide-based gas sensors: mechanisms, applications, and perspectives

Two-Dimensional ZnS/SnS2 Heterojunction as a Direct Z-Scheme Photocatalyst for Overall Water Splitting: A DFT Study

Surface Acoustic Wave Devices Based on Graphene Oxide/Au Nanorod Composites for Gas-Phase Detection of 2,4,6-Trinitrotoluene

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