Hierarchically structured LaFeO3 with hollow core and porous shell as efficient sensing material for ethanol detection

被引：61

作者：

Phan, Thi To Nga ^{[1
]}

Dinh, Thi Tra My ^{[1
]}

Nguyen, Minh Duc ^{[1
]}

Li, Dan ^{[2
]}

Phan, Chi Nhan ^{[3
]}

Pham, Trung Kien ^{[4
]}

Nguyen, Cong Tu ^{[5
]}

Pham, Thanh Huyen ^{[1
]}

机构：

[1] Hanoi Univ Sci & Technol, Sch Chem Engn, Dept Organ & Petrochem Technol, Hanoi, Vietnam

[2] Murdoch Univ, Coll Sci Hlth Engn & Educ, Murdoch, WA 6150, Australia

[3] Minist Ind & Trade Socialist Republ Viet Nam, Vietnam Chem Agcy, Ctr Chem Accid Response & Safety, Hanoi, Vietnam

[4] Viet Nam Minist Natl Def, Chem Command, Hanoi, Vietnam

[5] Hanoi Univ Sci & Technol, Sch Engn Phys, Dept Elect Mat, Hanoi, Vietnam

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2022年 / 354卷

关键词：

Perovskite; Hollow core; Porous surface; Ethanol; P-type behavior; Gas sensor; GAS SENSOR; CARBON NANOTUBES; HIGH RESPONSE; THIN-FILM; PERFORMANCE; SENSITIVITY; FABRICATION; ZNO; NANOSTRUCTURES; NANOPARTICLES;

D O I：

10.1016/j.snb.2021.131195

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Hollow LaFeO3 (LFO-HS) was synthesized by a facile hydrothermal method with the use of cetyl-trimethylammonium bromide. Its structural, morphological, microstructural and textual characterizations were performed using X-ray diffraction, scanning electron microscopy, transmission electron microscopy and nitrogen adsorption-desorption analysis. The gas-sensing performance of LFO-HS sensor was studied towards different gases, including ammonia (NH3), ethanol (C2H5OH), acetone (CH3COCH3), and liquefied petroleum gas (LPG). The LFO-HS sensor exhibited p-type gas sensing behavior and enhanced sensing performance towards ethanol gas as compared with bulk LaFeO3 sensor. A rapid, high, and stable response was seen at 300 degrees C. Meanwhile, a linear response and low limit of detection (1 ppb) to ethanol was observed. After the investigation on sensitivity to different reducing gases, our results revealed that the LFO-HS sensor exhibited good selectivity to ethanol and suggested it being a promising sensor candidate for future practical use in trace ethanol detection.

引用

页数：10

共 83 条

[1] Role of Oxygen Vacancies in Nanostructured Metal-Oxide Gas Sensors: A Review [J].