新型的mof衍生的金属氧化物In2O3/CoOOH异质结纳米结构的性能增强

IF 6.9 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science Pub Date : 2025-01-03 DOI:10.1016/j.apsusc.2025.162304

Qi Liu , Jiongjiang Liu , Hongda Liu , Xiaomeng Zheng , Qingjiang Pan , Guo Zhang

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引用次数: 0

摘要

本文首先合成了金属有机骨架（MOF）衍生的In2O3纳米管和Co-MOF前驱体，然后用氢氧化钠（NaOH）溶液对其进行蚀刻，制备了In2O3/CoOOH复合传感材料。采用XRD、FT-IR、SEM、TEM和XPS等表征方法对其结构和形貌进行了研究。In2O3/CoOOH复合材料对10 ppm NOx的响应值（Rg/Ra， Rg和Ra为被测气体和空气中的电阻）为84，约为室温下纯In2O3的2.5倍。同时，In2O3/CoOOH复合材料（141/78 s）的响应/恢复时间（达到整个电阻变化的90% %的时间）比纯In2O3（179/86 s）快。In2O3/CoOOH复合材料气敏性能的增强主要归因于高氧空位和吸附氧含量、大比表面积和异质结构的形成。采用原位红外光谱法研究了NOx在In2O3/CoOOH复合材料表面的吸附机理。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

The novel NOx sensing material MOF-derived metal oxides In2O3/CoOOH heterojunction nanostructures performance enhancement

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The novel NOx sensing material MOF-derived metal oxides In2O3/CoOOH heterojunction nanostructures performance enhancement

In this paper, we first synthesize the metal–organic framework (MOF) derived In₂O₃ nanotubes and Co-MOF precursors, then etch them with sodium hydroxide (NaOH) solution to prepare the In₂O₃/CoOOH composite sensing material. The structure and morphology were studied using various characterization methods such as XRD, FT-IR, SEM, TEM and XPS. The response value (R_g/R_a, R_g and R_a being the resistances in tested gas and air) of In₂O₃/CoOOH composite to 10 ppm NO_x is 84, which is about 2.5 times that of pure In₂O₃ at room temperature (RT). Meanwhile, the response/recovery time (the time to achieve 90 % of the entire resistance change) of the In₂O₃/CoOOH composite (141/78 s) is faster than that of pure In₂O₃ (179/86 s). The enhancement of gas sensing performance of the In₂O₃/CoOOH composite is attributed to the high oxygen vacancy and adsorbed oxygen content, large specific surface area and the formation of the heterostructures. The adsorption mechanism of NO_x on the surface of the In₂O₃/CoOOH composite was studied using in-situ infrared spectroscopy.

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来源期刊

Applied Surface Science 工程技术-材料科学：膜

CiteScore

12.50

自引率

7.50%

发文量

3393

审稿时长

67 days

期刊介绍： Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.