Inorganic-Diverse Nanostructured Materials for Volatile Organic Compound Sensing

Abstract

Environmental pollution related to volatile organic compounds (VOCs) has become a global issue which attracts intensive work towards their controlling and monitoring. To this direction various regulations and research towards VOCs detection have been laid down and conducted by many countries. Distinct devices are proposed to monitor the VOCs pollution. Among them, chemiresistor devices comprised of inorganic-semiconducting materials with diverse nanostructures are most attractive because they are cost-effective and eco-friendly. These diverse nanostructured materials-based devices are usually made up of nanoparticles, nanowires/rods, nanocrystals, nanotubes, nanocages, nanocubes, nanocomposites, etc. They can be employed in monitoring the VOCs present in the reliable sources. This review outlines the device-based VOC detection using diverse semiconducting-nanostructured materials and covers more than 340 references that have been published since 2016.

Controllable Transformation of 2D Perovskite for Multifunctional Sensing Properties

“…The nanostructural morphologies of active materials play a vital role in detection sensitivity due to the different absorption surface areas and reaction activity. , 2D perovskite films with different nanostructural morphologies were obtained by spin-coating at different speeds of 3000 (sample 1), 4000 (sample 2), and 5000 (sample 3) rpm. The cross-sectional SEM images of these films are shown in Figure S6.…”

Inverse and distorted Co2SnO4 cubic spinel thin films for dimethylamine detection at room temperature

“…Recently, semiconducting metal oxide (SMO) thin films have received much attention for the detection of VOCs. 7 Porosity will increase the surface area of the material, and enhance the diffusion between the sensing material and gas molecules. Thin film morphology, large reactive surface area, and size uniqueness will fasten the redox reaction, which results in a rapid response and high sensitivity.…”

“…8,9 SMOs are specifically considered due to their low fabrication cost, simple operating principles, miniaturized size, portability, low power consumption, withstanding high chemical environments, high durability, and reproducibility. 7 Binary metal oxide thin films, such as SnO 2 , ZnO, TiO 2 , and Co 3 O 4 , 10–22 are good candidates for gas sensing application. However, the higher operating temperature, cross-selectivity, and reversibility issues hinder the binary metal oxide gas sensors from large-scale applications.…”

Comparison of Characteristics of a ZnO Gas Sensor Using a Low-Dimensional Carbon Allotrope

“…In addition, owing to the changing trends, various complex phenomena are occurring, such as construction and living in ordinary houses and densely populated areas. Accordingly, various compounds volatilized from chemicals, such as preservatives, adhesives, and paints, used inside and outside the newly built buildings contaminate the indoor and outdoor air, and these contaminants directly or indirectly affect the human body and cause harmful reactions [ 2 , 3 , 4 , 5 ].…”