A 2-chloroethyl ethyl sulfide (2-CEES) gas sensor based on a WO₃/graphite nanocomposite with high selectivity and fast response-recovery properties

Abstract

Sensitive detection of toxic and harmful gases is essential in the field of environmental monitoring and human health. Among the detection strategies, gas sensors based on metal oxides are widely...

Preparation of a silver ferrite-assisted tungsten oxide nanocomposite for efficient sonocatalytic degradation of organic pollutants activated by PMS followed by toxicity evaluation

“…The XRD spectrum of the prepared WO 3 shows diffraction peaks at 2 θ = 23.1°, 2 θ = 23.5°, 2 θ = 24.5°, 2 θ = 26.8°, 2 θ = 28.9°, 2 θ = 33.5°, 2 θ = 34.5°, 2 θ = 42.1°, 2 θ = 47.4°, 2 θ = 48.3°, 2 θ = 50.4°, 2 θ = 53.7° and 2 θ = 56.2° corresponding to the crystal lattice of the (100), (020), (200), (120), (111), (021), (220), (222), (022), (043), (400), (241) and (340) planes respectively (JCPDS card no: 83-0950). 43 In AFO (AgFeO 2 ), the diffraction peaks at 2 θ = 13.7°, 2 θ = 28.4°, 2 θ = 35.1°, 2 θ = 39°, 2 θ = 43.4°, 2 θ = 51.9°, 2 θ = 60.6° and 2 θ = 68.5° can be indexed as the (003), (006), (101), (104), (009), (108), (110) and (116) planes respectively (JCPDS No: 01-25-0765). 44 This crystal lattice explains the formation of the rhombohedral structure of AgFeO 2 .…”

In situ laser-assisted decoration of Au nanoparticles on 3D porous graphene for enhanced 2-CEES sensing

“…13,14,18,19 The near room-temperature LIG/Au-0.1 M sensor with an ultralow LOD for 2-CEES and self-heating capability fabricated via a simple method in this work compares favorably to other reported 2-CEES sensors (Table S1, ESI †). [5][6][7][8][48][49][50][51] The responses of the LIG/Au-0.1 M sensor to 1.0 ppm 2-CEES, ethanol, hexane, NH 3 and NO 2 were also recorded to evaluate the selectivity [Fig. 5(b)].…”

“…13,14,18,19 The near room-temperature LIG/Au-0.1 M sensor with an ultralow LOD for 2-CEES and self-heating capability fabricated via a simple method in this work compares favorably to other reported 2-CEES sensors (Table S1, ESI†). 5–8,48–51…”

“…5 For the detection of 2-CEES, the focus has been on metal oxide semiconductor-based chemiresistive gas sensors because of their satisfactory sensitivity, low-cost and simple manufacturing process. [5][6][7][8][9][10] However, they often produce loud noises, and their working temperature is high (4200 1C), 9,10 which inevitably complicates the sensing device structure, expands power consumption and renders them unsuitable as deformable ambient sensors.…”

Accelerating the Gas–Solid Interactions for Conductometric Gas Sensors: Impacting Factors and Improvement Strategies

“…Figure 1 schematically shows the response and recovery times of a typical MOS gas sensor within one adsorption/desorption period [3]. Note that a majority of current MOSbased gas sensors suffer from slow response/recovery speeds, which severely hinders their further practical application [4][5][6]. Thus far, various strategies have been widely discussed, primarily in terms of response improvement.…”