Catalysis-Based Cataluminescent and Conductometric Gas Sensors: Sensing Nanomaterials, Mechanism, Applications and Perspectives

Abstract

Gas environment detection has become more urgent and significant, for both industrial manufacturing and environment monitoring. Gas sensors based on a catalytically-sensing mechanism are one of the most important types of devices for gas detection, and have been of great interest during the past decades. However, even though many efforts have contributed to this area, some great challenges still remain, such as the development of sensitively and selectively sensing catalysts. In this review, two representative catalysis-based gas sensors, cataluminescent and conductometric sensors, the basis of optical and electric signal acquisition, respectively, are summarized comprehensively. The current challenges have been presented. Recent research progress on the working mechanism, sensing nanomaterials, and applications reported by our group and some other researchers have been discussed systematically. The future trends and prospects of the catalysis-based gas sensors have also been presented.

Particle Size Effect on Optical and Gas-Sensing Properties of La0.67Ca0.2Ba0.13Fe0.97M0.03O3 (M = Ti4+, Mn3+, and Cr3+) Compounds

“…This explains the increase in the research interest in developing new reliable gas sensor devices to be used in a wide application area [1,2]. It is also known that the principle of detection defines the gas sensor type, such as electrochemical [3], catalytic [4], metal oxide [5], or infrared [6]. Moreover, calorimetric, spectroscopic, and chromatography methods have been used for gas sensor manufacturing, which are highly expensive, and their uses are restricted due to their miniaturization difficulties for portable uses [7][8][9].…”

Volatile organic compound gas sensors based on methylammonium lead iodide perovskite operating at room temperature

“…3,4 Some key requirements for gas sensors are sensitivity, fast response, room temperature operation, and low-cost fabrication. Regarding the principle of detection, various gas sensor types can be categorized into electrochemical types, 5 catalytic types, 6 metal oxide types, [7][8][9][10] and infrared types. 10 Recently, due to the emergence of smart sensor technology, the requirement is emphasized on low power and small size devices.…”

Continuous-Flow Photocatalytic Degradation of Organics Using Modified TiO2 Nanocomposites

“…TiO 2 nanotubes (TNTs) synthesized via anodization have generated significant attention in recent years [1,2] because of their extraordinarily technological importance and improved photoelectric properties for a wide variety of applications such as solar cells [3], photocatalysis [4], gas sensors [5,6], water splitting [7,8], and developing functional surface devices [9]. Moreover, TiO 2 decorated with reduced graphene oxide (RGO) [10], graphene oxide (GO) [11,12], and bismuth (Bi) [13] have been widely investigated owing to their lack of toxicity, high chemical stability, and capability of photooxidative destruction of most organic pollutants [14].…”