Structure, Optical and Formaldehyde Sensing Properties of Co-Precipitated Fe-Doped WO3 Nanomaterials

被引：16

作者：

Upadhyay, S. B. ^{[1
]}

Sahay, P. P. ^{[1
]}

机构：

[1] Motilal Nehru Natl Inst Technol, Dept Phys, Allahabad 211004, Uttar Pradesh, India

来源：

NANO | 2015年 / 10卷 / 08期

关键词：

Fe-doped WO3 nanomaterials; co-precipitation method; structural properties; formaldehyde sensor; THIN-FILMS; SENSOR; PERFORMANCE; SILICON;

D O I：

10.1142/S1793292015501131

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Co-precipitated undoped and Fe-doped WO3 nanomaterials have been investigated by X-ray diffraction, Raman spectroscopy and scanning electron microscopy in order to study the influence of Fe doping in their structural and morphological properties. The synthesized WO3 nanomaterials have been found to possess monoclinic structure having average crystallite sizes 15-20 nm. The diffuse reflectance spectroscopy shows the optical bandgap similar to 2.85 eV. The 1.8 at.% Fe-doped WO3 exhibits selective high response to formaldehyde over methanol, ethanol, propan-2-ol and acetone. It exhibits the maximum response (similar to 80%) to formaldehyde at the operating temperature of 225 degrees C for 50 ppm concentration in air.

引用

页数：12

共 38 条

[1]

[Anonymous], 2010, SCI DAILY

[2] Development of a novel gas sensor based on oxide thick films [J].

Arshak, K ;

Gaidan, I .

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 2005, 118 (1-3) :44-49

[3] PREPARATION AND CHARACTERIZATION OF DOPED WO3 PHOTOCATALYST POWDERS [J].

ASHOKKUMAR, M ;

MARUTHAMUTHU, P .

JOURNAL OF MATERIALS SCIENCE, 1989, 24 (06) :2135-2139

[4] Electrochromic smart windows: energy efficiency and device aspects [J].

Azens, A ;

Granqvist, CG .

JOURNAL OF SOLID STATE ELECTROCHEMISTRY, 2003, 7 (02) :64-68

[5] Conduction model of metal oxide gas sensors [J].

Barsan, N ;

Weimar, U .

JOURNAL OF ELECTROCERAMICS, 2001, 7 (03) :143-167

[6] Investigation of optical properties of SnO2 nanoparticles [J].

Chetri, Pawan ;

Choudhury, Amarjyoti .

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 2013, 47 :257-263

[7]

Cullity B. D., 1956, Elements of X-ray Diffraction

[8] NiO thin-film formaldehyde gas sensor [J].

Dirksen, JA ;

Duval, K ;

Ring, TA .

SENSORS AND ACTUATORS B-CHEMICAL, 2001, 80 (02) :106-115

[9] Detection of O3 and NH3 using hybrid tin dioxide/carbon nanotubes sensors: Influence of materials and processing on sensor's sensitivity [J].

Ghaddab, B. ;

Sanchez, J. B. ;

Mavon, C. ;

Paillet, M. ;

Parret, R. ;

Zahab, A. A. ;

Bantignies, J. -L. ;

Flaud, V. ;

Beche, E. ;

Berger, F. .

SENSORS AND ACTUATORS B-CHEMICAL, 2012, 170 :67-74

[10] In2O3-ZnO nanocomposites: High sensor response and selectivity to ethanol [J].

Gholami, Mahsa ;

Khodadadi, Abbas Ali ;

Firooz, Azam Anaraki ;

Mortazavi, Yadollah .

SENSORS AND ACTUATORS B-CHEMICAL, 2015, 212 :395-403

← 1 2 3 4 →