Hydrothermal synthesis of K2W4O13 nanowire with high H2S gas sensitivity

Perovskite hexagonal YMnO3 nanopowder as p-type semiconductor gas sensor for H2S detection

“…The response was perfectly stable and recovered its initial state, exhibiting switching characteristics. Table 1 shows the comparison between the H 2 S response of the proposed YMnO 3 nanopowder and that in the literature [55][56][57][58][59][60][61][62][63][64]. These results confirmed that YMnO 3 nanopowder has high sensitivity and good selectivity toward…”

Room‐temperature ferroelectric K2W7O22 (KWO) nanorods as a sensor material for the detection of acetone

“…Of the many sensors made to date for detecting trace chemicals in breath, tungsten oxide‐based sensors have shown great potential and have been used for detecting gases such as ethanol, acetone, NH 3 , formaldehyde, toluene, nitric oxide and H 2 S.(Righettoni, Tricoli, & Pratsinis, ; Staerz, Weimar, & Barsan, ; Supothina, Suwan, & Wisitsoraat, ; Tang, Jiang, Chen, & Wan, ) This is because tungsten oxide materials are easy to fabricate, low‐cost, and have excellent surface and material properties for applications as gas sensors. Sensors based on nanostructured WO 3 have been shown to be small, robust, inexpensive and highly sensitive.…”

Enhanced H2S Gas-Sensing Performance of Zn2SnO4 Lamellar Micro-Spheres

“…The gas response of the sensor increases in a good linear relationship from 50 to 1000 ppb ( R 2 = 0.9986), indicating that the detection limit of the sensor is 50 ppb (response of 1.29) to H 2 S. In contrast to the reported Zn 2 SnO 4 octahedron sensor (Ma et al, 2012), the present sensor displays lower working temperature and ppb-level detection limit. Even compared with other preferable ternary metal oxides, such as La 2 NiO 4 particles (500°C, 20 ppb, Hao et al, 2018), K 2 W 4 O 13 nano-wires (300°C, 0.3 ppm, Supothina et al, 2014), Fe 2 (MoO 4 ) 3 nano-particles and micro-spheres (300°C, 1 ppm, Liang et al, 2016), the present material still shows better sensing performance toward H 2 S. To the best of our knowledge, the detection limit of Zn 2 SnO 4 lamellar micro-spheres sensor is only slightly higher than that of flower-like Bi 2 MoO 6 (Cui et al, 2017) which has the lowest detection limit of 0.1 ppb to H 2 S. The response of the sensor in the range from 3 to 50 ppm also increases in a good linear relationship ( R 2 = 0.9927) (Figure S5). The responses of the sensor to 10 ppm H 2 S during 5 consecutive tests at 170°C is shown in Figure S6a.…”