Room-temperature high-performance ammonia gas sensor based on hydroxyapatite film

  1. Mingxu Sun,
  2. Ziheng LiORCID Logo,
  3. Yuwei Gu,
  4. Shuang Wu and
  5. Xinchen Wang

Submitting author affiliation: Jilin University, Changchun, China

Beilstein Arch. 2019, 20197.

Published 15 Apr 2019

  • Preprint


A room-temperature high-performance ammonia (NH3) gas sensor based on hydroxyapatite (HAp) film with three-dimensional network structure was reported in this paper. The gas sensor was fabricated on the indium tin oxide glass (ITO) interdigital electrode via simple electrochemical deposition technique. The HAp film gas sensor shows good sensitivity, high reproducibility and excellent selectivity to NH3 gas under dry and relative humidity (RH) conditions at room temperature. The response and recovery time of the HAp film gas sensor to 1000 ppm NH3 gas are 23 s and 14 s under N2 (dry) condition, and are 4 s and 11 s under air (RH≈30) condition, respectively. The HAp film gas sensor has no considerable deviation in the 1000 ppm NH3 gas for 3 cycles under N2 (dry), and so is air (RH≈30) conditions. The HAp film gas sensor shows excellent selectivity to methanol, acetone and ethanol under N2 (dry) and air (RH≈30) conditions. Above all, two sensing mechanisms of the HAp film gas sensor to NH3 gas have been also researched in this work.

Keywords: Hydroxyapatite film; Ammonia gas sensor; Three-dimensional network structure; Sensing mechanisms

Supporting Information

Format: DOCX Size: 36.1 KB   Download

How to Cite

When a peer-reviewed version of this preprint is available, this information will be updated in the information box above. If no peer-reviewed version is available, please cite this preprint using the following information:

Sun, M.; Li, Z.; Gu, Y.; Wu, S.; Wang, X. Beilstein Arch. 2019, 20197. doi:10.3762/bxiv.2019.7.v1

Download Citation
Download RIS (Reference Manager) Download BIB (BIBTEX)

© 2019 Sun et al.; licensee Beilstein-Institut.
This is an Open Access article under the terms of the Creative Commons Attribution License ( Please note that the reuse, redistribution and reproduction in particular requires that the authors and source are credited.
The license is subject to the Beilstein Archives terms and conditions: (

Other Beilstein-Institut Open Science Activities