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- W2969299726 abstract "In this paper, we synthesized a WO <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sub> /MoO <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sub> porous and hollow microsphere. Firstly, the WO <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sub> nanorods were synthesized by one-step hydrothermal method. Secondly, the WO <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sub> nanorods were added to the MoS <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sub> precursor solution, and the mixture was further hydrothermally treated. Finally, the obtained samples were heated and oxidized in air to obtain WO <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sub> /MoO <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sub> hollow nanospheres. The morphology and microstructure of the composite were observed by SEM and TEM, and its crystal structure was characterized by XRD. The results showed that the gas response of WO <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sub> /MoO <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sub> is greatly improved by the addition of MoO <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sub> . The response is up to 28000 to 100 ppm ammonia and the limit of detection is 100 ppb when the WO <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sub> /MoO <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sub> sensor is operated at the optimum operating temperature. It has basically no response to other volatile organic gases, which indicates that the sensor has an excellent selectivity. Furthermore, we also studied the gas sensing mechanism of WO <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sub> /MoO <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sub> porous and hollow sphere and the effect of different amount of WO <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sub> on the gas response of the composite." @default.
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- W2969299726 date "2019-12-01" @default.
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- W2969299726 title "High Response and Selectivity Ammonia Sensor Based on WO<sub>3</sub>/MoO<sub>3</sub> Porous and Hollow Microsphere" @default.
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