Electrochemically Decorated ZnTe Nanodots on Single-Walled Carbon Nanotubes for Room-Temperature NO2 Sensor Application

被引：5

作者：

Kim, Donguk ^{[1
]}

Park, Ki-Moon ^{[2
]}

Shanmugam, Rajakumar ^{[3
]}

Yoo, Bongyoung ^{[1
,2
,3
]}

机构：

[1] Hanyang Univ, Dept Bionanotechnol, Ansan 425791, South Korea

[2] Hanyang Univ, Dept Energy Sci & Engn Nanosolar Cell, Ansan 425791, South Korea

[3] Hanyang Univ, Dept Mat Engn, Ansan 425791, South Korea

来源：

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2014年 / 14卷 / 11期

关键词：

Carbon Nanotube; Sensor; NO2; Gas; ZnTe Nanodots; Electrodeposition; SENSING PROPERTIES; GAS SENSORS; GRAPHENE; ELECTRODEPOSITION; FILMS;

D O I：

10.1166/jnn.2014.9901

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A gas sensor with ZnTe nanodot-modified single-walled carbon nanotubes (SWCNTs) is demonstrated for NO2 detection at room temperature. ZnTe nanodots are electrochemically deposited in an aqueous solution containing ZnSO4, TeO2 and citrate. A deposition potential range of ZnTe formation of -0.65 to -0.9 V is determined by cyclic voltammetry, and an intermetallic ZnTe compound is formed at above 50 degrees C bath. SWCNT-based sensors show the highly sensitive response down to 1 ppm NO2 gas at room temperature. In particular, the sensitivity of ZnTe nanodot-modified SWCNTs is increased by 6 times as compared to that of pristine SWCNT sensors. A selectivity test of SWCNT-ZnTe nanodots sensors is carried out with ammonia gas (NH3) and methanol vapor (MeOH), and the result confirms an excellent selectivity to NO2 gas.

引用

页码：8248 / 8252

页数：5

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