Gas sensing performance of α-, α/β-, and β-Ga2O3 polymorphs

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-05-28 DOI:10.1016/j.materresbull.2025.113583

Nyepudzai C. Gatsi , Murendeni I. Nemufulwi , Gugu H. Mhlongo , Nosipho Moloto , Rudolph M. Erasmus , Elizabeth Coetsee , Hendrik C. Swart , Odireleng M. Ntwaeaborwa

引用次数: 0

Abstract

This paper reports the detection of SO₂, NH₃, and CO gases using Ga₂O₃ polymorphs. The α-Ga₂O₃, α/β-Ga₂O₃, and β-Ga₂O₃ sensing materials were prepared using the hydrothermal method, followed by calcination at different temperatures ranging from 550 °C to 950 °C. The gas sensing properties were measured and analyzed based on the polymorphism-induced physicochemical properties of the sensing materials. Different Ga₂O₃ polymorphs showed distinct sensing properties, and factors contributing to this preferential gas detection behavior are discussed in detail. The proposed gas sensing mechanisms were discussed. Notably, the gas sensing performance of the α/β-Ga₂O₃-based sensor is reported here for the first time.

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α-、α/β-和β- ga2o3多晶的气敏性能

本文报道了利用Ga2O3多晶体对SO2、NH3和CO气体的检测。采用水热法制备α- ga2o3、α/β-Ga2O3和β-Ga2O3传感材料，并在550 ~ 950℃的不同温度下进行煅烧。基于多晶化诱导的传感材料的物理化学性质，对传感材料的气体传感性能进行了测试和分析。不同的Ga2O3多晶表现出不同的传感特性，并详细讨论了影响这种优先气体检测行为的因素。讨论了所提出的气敏机理。值得注意的是，本文首次报道了基于α/β- ga2o3的传感器的气敏性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.