通过两步温度和压力控制优化sno2修饰In2O3纳米复合材料中移动载流子和表面缺陷之间的权衡

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-07-30 DOI:10.1016/j.jallcom.2025.182584

Jiyeon Shin, Jeong Yun Hwang, Jimyeong Park, Ok Sung Jeon, Jae-Hyoung Lee, Seung Yong Lee, Changhyun Jin, Myung Sik Choi

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引用次数: 0

摘要

采用两种连续的水热法制备了SnO2修饰的In2O3纳米复合材料，其特征是通过表面包裹机制在In2O3纳米立方体上生长出纳米叶状SnO2。这些样品对H₂S气体(150°C >；200℃>；100℃>；250°C)，这与半导体气体传感器的典型行为形成对比。这种非线性趋势归因于不同传感机制的主导地位：100至150°C之间的氧空位控制模式和200至250°C之间的多数载流子控制模式。结果强调了平衡工作温度和表面缺陷浓度之间的权衡对于增强气体传感的重要性。

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Optimization of trade-off between mobile carriers and surface defects for enhanced H2S sensing in SnO2-decorated In2O3 nanocomposites via two-step temperature and pressure control

SnO₂-decorated In₂O₃ nanocomposites that feature nanoleaf-like SnO₂ grown on In₂O₃ nanocubes via a surface-wrapping mechanism were synthesized using two consecutive hydrothermal methods. These samples exhibited an unusual temperature-dependent response to H₂S gas (150 °C > 200 °C > 100 °C > 250 °C), which contrasts with the typical behavior of semiconductor gas sensors. This nonlinear trend is attributed to the dominance of different sensing mechanisms: an oxygen vacancy-controlled mode between 100 and 150 °C and a majority carrier-controlled mode between 200 and 250 °C. The results highlight the importance of balancing the trade-off between operating temperature and surface-defect concentration to enhance gas sensing.

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.