Gas-sensing properties and mechanisms of Cu-doped SnO 2 spheres towards H 2 S
Source abstract
Abstract
Abstract We report on the synthesis of pristine and Cu-doped SnO 2 spheres using a facile hydrothermal method and investigate their microstructures and gas-sensing response. We focus on how Cu doping can have an impact on gas-sensing behavior of SnO 2 -based sensors toward H 2 S. We find that Cu doping can enhance significantly the gas response of SnO 2 toward H 2 S, the origin of which can be clarified with a proposed adsorption model. First-principles calculations reveal that adsorption energy of H 2 S on Cu-doped surface is lower than that on undoped one and the interaction between adsorbed H 2 S and Cu-doped surface is stronger than that between adsorbed H 2 S and pure surface, which consequently improves gas-sensing performances of SnO 2 toward H 2 S. Such a combined experimental and calculational study offers an explanation on how Cu doping affects gas-sensing performances of SnO 2 .
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Gas Sensing Nanomaterials and Sensors · Advanced Chemical Sensor Technologies · Acoustic Wave Resonator Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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