Citation: Duanmu Fanpeng, Shen Zhurui, Liu Qian, Zhong Shuhui, Ji Huiming. A WO₃-CuWO₄ nanostructured heterojunction for enhanced n-butanol sensing performance[J]. Chinese Chemical Letters, ;2020, 31(5): 1114-1118. doi: 10.1016/j.cclet.2019.07.032 shu

A WO₃-CuWO₄ nanostructured heterojunction for enhanced n-butanol sensing performance

Duanmu Fanpeng ^a ,
Shen Zhurui ^a,*, ,
Liu Qian ^a ,
Zhong Shuhui ^b,*, ,
Ji Huiming ^a,*,

a.
Key Laboratory of Advanced Ceramics and Machining Technology(Ministry of Education), School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China
b.
School of Mathematics, Tianjin University, Tianjin 300350, China

shenzhurui@tju.edu.cn

zhshuhui@tju.edu.cn

jihuiming@tju.edu.cn

Received Date: 15 June 2019
Revised Date: 7 July 2019
Accepted Date: 12 July 2019
Available Online: 13 July 2019

Figures(5)

Herein, a WO₃-CuWO₄ nanostructured heterojunction was prepared by a facile two-step hydrothermal method. It is composed of a WO₃ square microplate and CuWO₄ nanoparticles. Then, the gas sensing properties were investigated under optimal operating temperature (120 ℃). The WO₃-CuWO₄ heterostructure shows good sensing performance towards n-butanol, with a response value up to 9.4 to towards 30 ppm n-butanol, and the response value is about 3 times higher than that of pristine WO₃. Its detection limit for n-butanol is 0.1 ppm, which indicates a potential application in lower concentration detection. Moreover, the response time of WO₃-CuWO₄ nanostructured heterojunction and the pristine WO₃ are 21 s and 240 s respectively, revealing that there is a faster gas sensing process in the heterostructure. A possible sensing mechanism was then proposed on the basis of experimental data and band structure analysis. The significant enhancement of WO₃-CuWO₄ heterostructure could be attributed to the formation of heterojunction, which brings electronic sensitization and electron transport pathway modulation. The work offered a kind of novel and cost-effective sensing materials, and inspired more novel devices based on nanostructured heterojunction mechanism.
- Gas sensor,
- Tungsten oxide,
- Copper tungstate,
- Nanostructured heterojunction,
- Nanoparticle,
- n-Butanol
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通讯作者: 陈斌, bchen63@163.com

A WO₃-CuWO₄ nanostructured heterojunction for enhanced n-butanol sensing performance