Zn mixed CeO2 nanoparticles: Enhancement of NO2 gas sensing performance
Source abstract
Abstract
Nitrogen dioxide (NO 2) is highly noxious and detrimental to both human health and the natural environment, making it imperative to create a sensor capable of detecting NO 2 gas. In this paper, we demonstrate the fabrication of zinc mixed cerium oxide (CZ) nanoparticles (NPs) sensor using a simple chemical route. The compositional, structural, morphological, and gas sensing characteristics of prepared Zn mixed CeO 2 (CZ) NPs (with Zn content ranging from 1to 5 wt%) were investigated by various characterization techniques. The as-prepared Zn mixed CeO 2 NPs (CZ) exhibited cubic crystal structure. The CeO 2 nanoparticles mixed with 5 wt% Zn (CZ5 NPs) exhibited a larger surface area of m58.90 m 2/g. The Zn (5 wt%) mixed CeO 2 nanoparticles sensor achieved a remarkable maximum sensing response of 91.31% to 100 ppm and 5.53% to 1 ppm NO 2 at a working temperature of 150 °C. The sensor demonstrated excellent reproducibility, with a rapid response time of 14.20 seconds and a recovery time of 350.65 seconds, along with notable stability at 89.80%. The remarkable response of porous Zn (5 wt%) mixed CeO 2 NPs to NO 2 can be attributed to their unique porous structure and the synergistic effect of Zn and CeO 2 , which together provide a substantial specific surface area, along with the presence of oxygen vacancies within the sensing material. Impedance and X-ray photoelectron spectroscopy (XPS) were employed to explore the potential NO 2 sensing mechanism of the Zn (5 wt%) mixed CeO 2 sensor.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Gas Sensing Nanomaterials and Sensors · ZnO doping and properties · Catalytic Processes in Materials Science
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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