Enhanced hydrogen sulfide sensing properties of Pt-functionalized α-Fe2O3 nanowires prepared by one-step electrospinning

被引：53

作者：

Guo, Lanlan ^{[1
]}

Xie, Ning ^{[1
]}

Wang, Chong ^{[1
]}

Kou, Xueying ^{[1
]}

Ding, Mengdi ^{[1
]}

Zhang, Hong ^{[1
]}

Sun, Yanfeng ^{[1
]}

Song, Hongwei ^{[1
]}

Wang, Yue ^{[2
]}

Lu, Geyu ^{[1
]}

机构：

[1] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, 2699 Qianjin St, Changchun 130012, Jilin, Peoples R China

[2] Jilin Univ, Coll Chem, State Key Lab Supramol Struct & Mat, 2699 Qianjin St, Changchun 130012, Jilin, Peoples R China

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2018年 / 255卷

关键词：

Pt-functionalized alpha-Fe2O3 nanowires; Electrospinning; Chemical sensitization; Electronic sensitization; Hydrogen sulfide; GAS SENSOR; HYDROTHERMAL SYNTHESIS; FACILE SYNTHESIS; H2S; PERFORMANCE; NANOPARTICLES; COMPOSITES; NANOFIBERS; NANORODS; IN2O3;

D O I：

10.1016/j.snb.2017.07.055

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Pure alpha-Fe2O3 nanowires (NWs) and 0.5, 1 and 3 mol% Pt-functionalized alpha-Fe2O3 nanowires have been successfully synthesized via simple homotaxial electrospinning methods. The nanostructures and morphologies of the as-obtained nanowires were characterized through various experimental techniques. The morphologies of the as-obtained samples and the chemical state of Pt element were characterized by transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), high-resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectrum (XPS). Furthermore, comparative gas sensing investigations about the series of Pt-functionalized alpha-Fe2O3 nanowires and pure alpha-Fe2O3 nanowires were performed to demonstrate the superior sensing properties of the Pt-functionalized samples. According to the experimental results, the sensor with 1 mol% Pt-functionalized alpha-Fe2O3 nanowires exhibited the highest response (157-10 ppm H2S) and noticeable selectivity at 175 degrees C, which could be attributed to the chemical sensitization (catalytic oxidation) of Pt on alpha-Fe2O3, and the porous structure of the nanowires. (C) 2017 Published by Elsevier B.V.

引用

页码：1015 / 1023

页数：9

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