4.6 Review

Approaches to Enhancing Gas Sensing Properties: A Review

Journal

SENSORS
Volume 19, Issue 7, Pages -

Publisher

MDPI
DOI: 10.3390/s19071495

Keywords

gas nanosensors; nanomaterials; sensing properties; mechanism

Funding

  1. National Natural Science Foundation of China [61833006, 61673367, 61504023]
  2. Fundamental Research Funds for the Central Universities in China [N180408018, N170405001, N180102032, N170407005]
  3. Liaoning Province Natural Science Foundation [20180550483, 20170540324]

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A gas nanosensor is an instrument that converts the information of an unknown gas (species, concentration, etc.) into other signals (for example, an electrical signal) according to certain principles, combining detection principles, material science, and processing technology. As an effective application for detecting a large number of dangerous gases, gas nanosensors have attracted extensive interest. However, their development and application are restricted because of issues such as a low response, poor selectivity, and high operation temperature, etc. To tackle these issues, various measures have been studied and will be introduced in this review, mainly including controlling the nanostructure, doping with 2D nanomaterials, decorating with noble metal nanoparticles, and forming the heterojunction. In every section, recent advances and typical research, as well mechanisms, will also be demonstrated.

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