Operando Cell for Synchrotron Studies of Gas Sensors

IF 0.8 Q3 Engineering

Nanotechnologies in Russia Pub Date : 2024-09-10 DOI:10.1134/S2635167624600810

M. A. Gritsai, V. A. Polyakov, P. V. Medvedev, Yu. Yu. Zhityaeva, O. I. Il’in, M. A. Soldatov

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引用次数: 0

Abstract

A cell for conducting operando measurements of X-ray absorption spectra for gas-sensitive sensors based on ZIF-8/ZIF-67 nanofilms is developed and fabricated. The cell is made of stainless steel, which makes it possible to study, among other things, corrosive gases. The possibility of heating and continuous measurement of the sensor temperature during an operando experiment to evaluate the dynamics of sorption in the processes of heating/cooling the cell. The isolated sensor holder has contacts for measuring the capacitance/resistance of the sensor. To measure X-ray absorption spectra for gas-sensitive gas-sensor materials, an X-ray transparent window is provided. For sensors based on ZIF-8 and ZIF-67 nanofilms, the X-ray absorption spectra are measured for the K edges of Zn and Co, respectively. It is found that after exposure to NO₂ in a gas-sensitive material based on ZIF-8/ZIF-67 nanofilms, long-range order is lost and the film undergoes amorphization. The X-ray absorption spectra measured for a gas-sensitive material based on ZIF-8/ZIF-67 nanofilms before and after exposure to NO₂ indicate a change in the local atomic and electronic structures near cobalt atoms.

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用于同步辐射气体传感器研究的操作室

我们开发并制造了一种用于对基于 ZIF-8/ZIF-67 纳米薄膜的气敏传感器的 X 射线吸收光谱进行操作测量的样品池。该样品池由不锈钢制成，因此可以研究腐蚀性气体等。在操作实验过程中，可以对传感器温度进行加热和连续测量，以评估电池加热/冷却过程中的吸附动态。隔离传感器支架上有测量传感器电容/电阻的触点。为测量对气体敏感的气体传感器材料的 X 射线吸收光谱，提供了一个 X 射线透明窗口。对于基于 ZIF-8 和 ZIF-67 纳米薄膜的传感器，分别测量了 Zn 和 Co 的 K 边的 X 射线吸收光谱。研究发现，基于 ZIF-8/ZIF-67 纳米薄膜的气敏材料暴露于二氧化氮后，长程有序性丧失，薄膜发生非晶化。基于 ZIF-8/ZIF-67 纳米薄膜的气敏材料在暴露于二氧化氮前后测量到的 X 射线吸收光谱表明，钴原子附近的局部原子结构和电子结构发生了变化。

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来源期刊

Nanotechnologies in Russia NANOSCIENCE & NANOTECHNOLOGY-

CiteScore

1.20

自引率

0.00%

发文量

期刊介绍： Nanobiotechnology Reports publishes interdisciplinary research articles on fundamental aspects of the structure and properties of nanoscale objects and nanomaterials, polymeric and bioorganic molecules, and supramolecular and biohybrid complexes, as well as articles that discuss technologies for their preparation and processing, and practical implementation of products, devices, and nature-like systems based on them. The journal publishes original articles and reviews that meet the highest scientific quality standards in the following areas of science and technology studies: self-organizing structures and nanoassemblies; nanostructures, including nanotubes; functional and structural nanomaterials; polymeric, bioorganic, and hybrid nanomaterials; devices and products based on nanomaterials and nanotechnology; nanobiology and genetics, and omics technologies; nanobiomedicine and nanopharmaceutics; nanoelectronics and neuromorphic computing systems; neurocognitive systems and technologies; nanophotonics; natural science methods in a study of cultural heritage items; metrology, standardization, and monitoring in nanotechnology.