Citation: SAN Xiaoguang, GONG Xiaohui, LU Yiming, QIAO Tongtong, YOU Yu, MENG Dan. Synthesis of NiO-WO₃ Nanocubes and Their Application in Detecting Formaldehyde[J]. Chinese Journal of Applied Chemistry, ;2020, 37(10): 1203-1210. doi: 10.11944/j.issn.1000-0518.2020.10.200059 shu

Synthesis of NiO-WO₃ Nanocubes and Their Application in Detecting Formaldehyde

Shenyang University of Chemical Technology, Shenyang 110142, China

Corresponding author: MENG Dan, mengdan0610@hotmail.com
Received Date: 4 March 2020
Revised Date: 22 May 2020
Accepted Date: 10 June 2020

Fund Project: Liaoning Provincial Natural Science Foundation 2019-ZD-0072the National Natural Science Foundation of China 61973223Supported by the National Natural Science Foundation of China(No.61973223), and Liaoning Provincial Natural Science Foundation(No.2019-ZD-0072)

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The NiO-WO₃ nanocubes are synthesized by hydrothermal synthesis. The p-n junction is formed by introducing p-type NiO to WO₃ nanocubes. The products are characterized by XRD and SEM and have cube-like structures which are successfully retained after introducing NiO. The formaldehyde gas sensing properties are systematically investigated between the pure and NiO-WO₃ nanocubes. The NiO-WO₃ nanocube sensor exhibits enhanced response and lower operating temperature compared to the pure one. Especially, the 5% molar fraction of NiO-WO₃ nanocube sensor exhibits the excellent sensing properties. Its highest response to 0.134 mg/L formaldehyde gas is 18.5 at 200 ℃. In addition, fast response and recovery, good reproducibility and stability, and good selectivity to formaldehyde are also obtained, indicating the formation of NiO-WO₃ heterojunction in favor of improving the sensing properties. Meanwhile, the sensing enhancement mechanism of the NiO-WO₃ nanocubes is also discussed, which is related to the formation of hetrojunction at interface and the high catalytic activity of NiO.
- NiO-WO₃,
- nanocubes,
- formaldehyde detection
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Synthesis of NiO-WO3 Nanocubes and Their Application in Detecting Formaldehyde

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通讯作者: 陈斌, bchen63@163.com

Synthesis of NiO-WO₃ Nanocubes and Their Application in Detecting Formaldehyde