石墨氮化碳中氮空位缺陷对石英晶体微平衡传感器氢气吸附的影响。

IF 2.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Yasushi Ishiguro, Osuke Uemura, Kazuya Kanasugi, Takashi Tachiki, Kenji Hirakuri
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引用次数: 0

摘要

以三聚氰胺和氢氧化钾为原料,煅烧合成了具有氮空位缺陷的石墨化氮化碳(g-C3N4)。随着KOH的加入,g-C3N4膜的氮碳比(N/C)降低,说明KOH的加入可以控制g-C3N4的氮空位缺陷。在石英晶体衬底上制备了具有氮空位缺陷的g-C3N4薄膜。利用石英晶体微天平(QCM)法测量了引入氢气前后晶体谐振频率的变化。利用该方法对氢传感器进行了有效表征。含有缺陷g-C3N4膜的qcm型传感器对氢的频率响应与未添加KOH的原始g-C3N4膜的传感器不同。也就是说,缺陷g-C3N4的谐振频率随着氢的引入而降低,而原始g-C3N4的谐振频率则升高。缺陷g-C3N4的频率降低可能是由于在FT-IR测量中观察到与氢(C-H)形成化学键。研究结果表明,在g-C3N4中引入氮空位缺陷会显著影响qcm型氢传感器的特性。此外,控制氮空位的引入量对氢气的频率响应有显著影响。利用g-C3N4的qcm型传感器预计将在未来的一系列气体传感器中得到应用,这取决于控制氮空位缺陷精确数量的研究进展。 。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of nitrogen-vacancy defects in graphitic carbon nitride on hydrogen adsorption in quartz-crystal microbalance sensor for hydrogen gas.

A graphitic carbon nitride (g-C3N4) with nitrogen-vacancy defects was synthesized by calcination of a mixture of melamine and potassium hydroxide (KOH). The nitrogen/carbon ratio (N/C) of the g-C3N4 film decreased with the addition of KOH, indicating that the KOH addition could control the nitrogen-vacancy defects in the g-C3N4. The g-C3N4 films with nitrogen-vacancy defects were formed on a quartz crystal substrate. The change in the resonant frequency of the crystal was measured before and after the introduction of hydrogen gas, utilizing the quartz crystal microbalance (QCM) method. This approach was employed to characterize the hydrogen sensor effectively. The QCM-type sensor with the defective g-C3N4 film had a different frequency response to the hydrogen than the sensor with pristine g-C3N4 film synthesized without KOH addition. That is, the resonant frequency of the defective g-C3N4 decreased with the introduction of hydrogen, while that of pristine g-C3N4 was observed to increase. The reduced frequency of the defective g-C3N4 is probably due to the formation of chemical bonds with hydrogen (C-H) as observed in the FT-IR measurements. Our findings show that the introduction of nitrogen-vacancy defects into the g-C3N4 significantly impacts the characteristics of QCM-type hydrogen sensors. Moreover, controlling the amount of nitrogen vacancies introduced has a significant effect on the frequency response to the hydrogen gas. The QCM-type sensor utilizing g-C3N4 is anticipated to find applications in a range of gas sensors in the future, contingent upon the progress of research focused on controlling the precise number of nitrogen-vacancy defects.

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来源期刊
Nanotechnology
Nanotechnology 工程技术-材料科学:综合
CiteScore
7.10
自引率
5.70%
发文量
820
审稿时长
2.5 months
期刊介绍: The journal aims to publish papers at the forefront of nanoscale science and technology and especially those of an interdisciplinary nature. Here, nanotechnology is taken to include the ability to individually address, control, and modify structures, materials and devices with nanometre precision, and the synthesis of such structures into systems of micro- and macroscopic dimensions such as MEMS based devices. It encompasses the understanding of the fundamental physics, chemistry, biology and technology of nanometre-scale objects and how such objects can be used in the areas of computation, sensors, nanostructured materials and nano-biotechnology.
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