High Sensitivity NO2 Gas Sensor Based on 3D WO3 Microflowers Assembled by Numerous Nanoplates

被引：7

作者：

Cao, Pei-Jiang ^{[1
]}

Li, Meng ^{[2
]}

Rao, Ch. N. ^{[2
]}

Han, Shun ^{[2
]}

Xu, Wang-Ying ^{[1
]}

Fang, Ming ^{[1
,2
]}

Liu, Xin-Ke

Zeng, Yu-Xiang ^{[1
]}

Liu, Wen-Jun ^{[1
]}

Zhu, De-Liang ^{[1
]}

Lu, You-Ming ^{[1
]}

机构：

[1] Shenzhen Univ, Guangdong Res Ctr Interfacial Engn Funct Mat, Shenzhen Engn Lab Adv Technol Ceram, Shenzhen Key Lab Special Funct Mat, Shenzhen 518055, Peoples R China

[2] Shenzhen Univ, Coll Mat Sci & Engn, Shenzhen, Peoples R China

来源：

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2020年 / 20卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Tungsten Oxide; Microflowers; Hydrothermal Process; NO2; SENSING PROPERTIES; SOLVOTHERMAL SYNTHESIS; FACILE SYNTHESIS; ZNO; ACETONE; NANOSHEETS; MICROSPHERES; SNO2;

D O I：

10.1166/jnn.2020.17175

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Tungsten oxide microflowers (WO3 MFs) were fabricated by a simple hydrothermal process through adjusting the pH of the solution by HCl. These MFs possess the outer diameters of about 2 mu m and are composed of numerous nanoplates with the average pore size of 10.9 nm. Chemiresistive activity of as-fabricated WO3 MFs sensor was attempted towards oxidizing and reducing target gases, revealing a superior selectivity to NO2 with a maximum response of 22.95 (2 ppm NO2) @ 105 degrees C compared to other target gases. One of the key features of as-fabricated WO3 MFs sensor is the lower detection limit of 125 ppb and operating temperature of 105 degrees C to NO2 with better reproducibility, signifying commercial prospective of the developed sensor materials. Finally, the gas sensing mechanism of WO3 MFs sensor has been proposed.

引用

页码：1790 / 1798

页数：9

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