In-situ construction of SnO2 nanolayer-SnS2 nanosheets heterostructures for enhanced NO2 sensing at room temperature and their DFT investigation
Source abstract
Abstract
Traditional NO 2 sensors based on metal oxide semiconductors suffer from high power consumption, creating a pressing demand for novel NO 2 sensors operating at room temperature. Motivated by this, SnO 2 nanolayer modified SnS 2 nanosheets heterostructures were successfully prepared through an in-situ synthesis process by mildly annealing pure SnS 2 nanosheets for NO 2 detection at room temperature. The SnO 2 oxidation nanolayer was formed on the SnS 2 nanosheets with an average thickness of 14 nm. The optimal sensor based on the obtained heterostructures achieves a high response of 6.0–1 ppm NO 2 at room temperature of 25 °C. The designed sensor also exhibits excellent repeatability, selectivity, and long-term stability. Furthermore, the density functional theory calculations proved that the presence of SnO 2 nanolayer promoted NO 2 adsorption capacity of SnS 2 nanosheets, thereby enhancing the sensing performance. The extraordinary gas sensing performance was ascribed to enhanced specific surface area and n-n heterojunction built between the SnO 2-SnS 2 interface. The novel SnO 2 nanolayer-SnS 2 nanosheets heterostructures offer a promising candidate for high-performance room-temperature NO 2 sensors.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Gas Sensing Nanomaterials and Sensors · ZnO doping and properties · Transition Metal Oxide Nanomaterials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (53)
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