Automated room temperature optical absorbance CO sensor based on In-doped ZnO nanorod

Chun Hui Tan, Sin Tee Tan, Hock Beng Lee, Riski Titian Ginting, Hind Fadhil Oleiwi, Chi Chin Yap, Mohammad Hafizuddin Jumali, Muhammad Yahaya

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Metal oxide based optical absorbance gas sensor (MOAGS) exhibits underlying potential to be the most promising energy-saving device with long-term stability and excellent sensing performance. In this work, a self-customized automated MOAGS setup was employed to study the carbon monoxide (CO) gas sensing performance between the hydrothermal synthesized ZnO nanorod (ZNR) and Indium-doped ZnO nanorod (IZNR) operating at room temperature of (25 ± 1)°C. Specifically, it was found that the In3+ was evenly doped into ZnO lattice which in turn increased the defect density and generated an impurity state within the energy band structure of ZnO. The results showed that 0.04 mol% IZNR exhibited an optimum sensing performance with absolute optical absorbance change (OAC) of 0.067 a.u. under the 10 ppm of CO gas testing environment with fastest respond and recovery time. The dependency of sensing performances to the optical band gap energy alteration and the defect state was evaluated. This work provides a simple and feasible route to develop the room temperate operating MOAGS for hazardous gas detection.

Original languageEnglish
Pages (from-to)140-152
Number of pages13
JournalSensors and Actuators, B: Chemical
Volume248
DOIs
Publication statusPublished - 1 Sep 2017

Fingerprint

Optical sensors
Carbon Monoxide
Chemical sensors
Nanorods
Carbon monoxide
carbon monoxide
Oxides
nanorods
Indium
Gases
Metals
Band structure
sensors
Sensors
room temperature
gases
metal oxides
Operating rooms
Defect density
Optical band gaps

Keywords

  • Carbon monoxide
  • Defect
  • Hydrothermal
  • Indium
  • Optical gas sensor
  • ZnO nanorods

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry
  • Electrical and Electronic Engineering

Cite this

Automated room temperature optical absorbance CO sensor based on In-doped ZnO nanorod. / Tan, Chun Hui; Tan, Sin Tee; Lee, Hock Beng; Ginting, Riski Titian; Oleiwi, Hind Fadhil; Yap, Chi Chin; Jumali, Mohammad Hafizuddin; Yahaya, Muhammad.

In: Sensors and Actuators, B: Chemical, Vol. 248, 01.09.2017, p. 140-152.

Research output: Contribution to journalArticle

Tan, Chun Hui ; Tan, Sin Tee ; Lee, Hock Beng ; Ginting, Riski Titian ; Oleiwi, Hind Fadhil ; Yap, Chi Chin ; Jumali, Mohammad Hafizuddin ; Yahaya, Muhammad. / Automated room temperature optical absorbance CO sensor based on In-doped ZnO nanorod. In: Sensors and Actuators, B: Chemical. 2017 ; Vol. 248. pp. 140-152.
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