Enhancing gas sensor performance via innovative synthesis and electronic structure tuning of highly porous nanomaterials

Abstract

1) bimetallic synergy, 2) heterojunction construction, and 3) catalysts loading approach. The sensing behavior of developed materials was investigated and also revealed by the theoretical calculations. In last, some critical challenges and future perspectives of chemiresistive materials for practical systems have been addressed in more depth. I believe this thesis ·will offer fundamental and useful guidance not only for the rational design of porous nanomaterials but also for practical gas detection applications in the foreseeable future.

With the rapid growth of industry, gas pollution has caused severe environmental problems. It specifically includes the leakage of explosive gases which can cause an explosion and toxic organic gases which is harmful to human health. It’s difficult to distinguish these gases by human sense because of some odorless gases such as $H_2$. In this sense, it is essential to find a way to distinguish these gases correctly and precisely. Hence, gas detection attracted attention worldwide nowadays. The existing types of gas sensors including infrared sensors, photoionization sensors, and chromatography sensors commonly required a complicated sensing system, which further limited the popular application of gas sensors. Considering this, chemo resistive gas sensors have been selected to overcome the above obstacles. In this thesis, I have introduced chemiresistive sensing systems along with their detailed working principles and outlined several recent advances in porous nanomaterial-based gas detection systems including (e.g. $H_2$, acetone). Afterward, the three strategies to develop high-performance porous nanomaterials were successively dealt with