Highly selective detection of NH3 and H2S using the pristine CuO and mesoporous In2O3@CuO multijunctions nanofibers at room temperature

Jiao Zhou, Muhammad Ikram, Afrasiab Ur Rehman, Jing Wang, Yiming Zhao, Kan Kan, Weijun Zhang, Fazal Raziq, Li Li, Keying Shi

Research output: Contribution to journalArticlepeer-review

78 Scopus citations

Abstract

To further develop sensing materials for the detection of reducing gases like NH3 and H2S and improve their response efficiency and selectivity, mesoporous In2O3@CuO composite multijunctions nanofibers (ICCNs) was synthesized by an electrospinning approach with a subsequent thermal treatment. Comparison was made with the one-dimensional (1D) pristine CuO multijunctions nanofibers (NFs). It was found that the CuO NFs have many p-p homojunctions and lots of chemisorbed oxygen, allowing for excellent gas sensing behaviors towards H2S at room temperature (RT). Interestingly, the ICCNs’ sensors favor to detect NH3 gas. Amongst them, ICCN-5 (short for the sensor composite where the molar ratio of Cu: In is 100: 5) behaves very fast response, excellent selectivity and good stability (within 30 days) toward 10 ppm NH3 at RT. The significantly enhanced sensing property of ICCNs to NH3 could be attributed to the synergistic effect of In2O3 promoter, multijunctions and unique mesoporous structure of NFs. Our studies demonstrated that 1D-CuO and ICCN-5 sensors were promising candidates of practical detectors to H2S and NH3 at RT.
Original languageEnglish (US)
Pages (from-to)1819-1830
Number of pages12
JournalSensors and Actuators, B: Chemical
Volume255
DOIs
StatePublished - Feb 1 2018
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2023-09-21

ASJC Scopus subject areas

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

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