Sensing of n-Butanol Vapours with Oxygen Vacancy-Enriched Zn2SnO4-SnO2 Hybrid-composite

IF 2.9 3区化学 Q3 CHEMISTRY, PHYSICAL

Physical Chemistry Chemical Physics Pub Date : 2024-12-30 DOI:10.1039/d4cp04070h

Reshmi Thekke Parayil, Snehangshu Paine, Kalisadhan Mukherjee, Deepak Tyagi, Manoj Mohapatra, Santosh Kumar Gupta

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引用次数: 0

Abstract

The precise identification of various toxic gases is important to prevent the health and environmental hazards using cost effective, efficient metal oxide based chemiresistive sensing method. This study explores the sensing properties of a chemiresistive sensor based on a Zn2SnO4-SnO2 nanocomposite for detecting n-butanol vapours. The nanocomposite, enriched with oxygen vacancies, was thoroughly characterized, confirming its structure, crystallinity, morphology and elemental composition. The sensor demonstrated high repeatability across the temperature range of 275-350 °C and concentrations from 100-1000 ppm, with the highest response observed at 350 °C. The response time increases as the concentration of n-butanol increases. The conductance transients were modelled using the Langmuir-Hinshelwood mechanism, showing temperature-dependent oxidation kinetics. At lower temperatures, the rate-determining step involved n-butanol oxidation, while at higher temperatures, simultaneous oxidation and desorption processes dominated. The calculated activation energy for n-butanol oxidation step was 0.12 eV. Furthermore, Principal Component Analysis (PCA) effectively discriminated between different n-butanol concentrations, emphasizing the sensor's potential for selective n-butanol detection through a combination of kinetic modelling and statistical analysis.

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来源期刊

Physical Chemistry Chemical Physics 化学-物理：原子、分子和化学物理

CiteScore

5.50

自引率

9.10%

发文量

2675

审稿时长

2.0 months

期刊介绍： Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.