AI Article Synopsis
- The manuscript discusses the creation of advanced gas sensors using TiO nanotube arrays combined with reduced graphene oxide (rGO) for detecting NO gas at room temperature.
- The synthesis methods and structural characteristics show that rGO helps improve electron transfer and enhances the sensor's efficiency significantly compared to undoped TiO sensors.
- Key improvements include a strong response to NO concentrations and faster response/recovery times, which result from enhanced surface area and improved chemical interactions between TiO and rGO.
Article Abstract
The development of energy-efficient, sensitive, and reliable gas sensors for monitoring NO concentrations has garnered considerable attention in recent years. In this manuscript, TiO nanotube arrays/reduced graphene oxide nanocomposites with varying rGO contents (TiO NTs/rGO) were synthesized via a two-step method for room temperature NO gas detection. From SEM and TEM images, it is evident that the rGO sheets not only partially surround the TiO nanotubes but also establish interconnection bridges between adjacent nanotubes, which is anticipated to enhance electron-hole separation by facilitating electron transfer. The optimized TiO NTs/rGO sensor demonstrated a sensitive response of 19.1 to 1 ppm of NO, a 5.26-fold improvement over the undoped TiO sensor. Additionally, rGO doping significantly enhanced the sensor's response/recovery times, reducing them from 24 s/42 s to 18 s/33 s with just 1 wt.% rGO. These enhancements are attributed to the increased specific surface area, higher concentration of chemisorbed oxygen species, and the formation of p-n heterojunctions between TiO and rGO within the nanocomposites. This study provides valuable insights for the development of TiO/graphene-based gas sensors for detecting oxidizing gases at room temperature.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11597787 | PMC |
| http://dx.doi.org/10.3390/nano14221844 | DOI Listing |
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