在水中悬浮的光催化反应:FTIR光谱法与减弱总反射在钻石
Zhebin Fu1,2, Hiroshi Onishi1,3,4
1Department of Chemistry, School of Science, Kobe University, Kobe, Hyogo 657-8501, Japan.
ACS omega
|September 25, 2023
概括
红外光谱学追踪了鲁纳米颗粒上的光催化反应. 这种方法在紫外线下监测了pivalic酸的分解和电子行为,为液体-固体界面化学提供了洞察力.
科学领域:
- 材料科学 材料科学 材料科学
- 摄影化学的使用.
- 频谱学是一种光谱学.
背景情况:
- 有机化合物的光催化转化对于环境修复和化学合成至关重要.
- 了解液体-固体界面上的反应需要先进的现场表征技术.
- 鲁纳米粒子是已知的光催化剂,但它们的反应机制需要详细的研究.
研究的目的:
- 用红外吸收光谱学来描述皮瓦酸在鲁纳米颗粒上的光催化转化.
- 为了证明在光化学反应期间对振动和电子过渡进行操作监测的可行性.
- 为了研究吸附物种和电子转移过程在液体-固体界面的行为.
主要方法:
- 使用红外吸收光谱仪与钻石镜用于总内部反射.
- 在酸水溶液中分散的鲁纳米颗粒.
- 用紫外线照射样品,并监测光谱变化.
- 分析了吸附物种的振动光谱和电子吸收的电子行为.
主要成果:
- 检测到pivalic酸的分离性吸附,在鲁纳米颗粒上形成pivalate离子.
- 观察到吸附的pivalate离子的分解,在紫外线照射时释放二氧化碳 (CO2).
- 在无氧条件下鉴定了由于电子宿位的小极子形成 (以7000 cm-1为中心).
- 确认了电子转移到有氧大气层,消除了极子吸收.
结论:
- 红外吸收光谱是一种强大的工具,用于在液体-固体界面上对光化学反应进行操作监测.
- 该研究成功地追踪了吸附分子的振动变化和电荷载体的电子转换.
- 获得了关于pivalic 酸脱碳化和 rutile 电子动态的机械洞察.
更多相关视频
10:35Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
Published on: May 29, 2018
8.8K
10:03Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy
Published on: June 27, 2014
18.0K
相关概念视频
01:13Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview
411
Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...
The ATR process begins by directing a beam...
411
01:25IR Spectrometers
1.2K
There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
1.2K
01:05Total Internal Reflection Fluorescence Microscopy
5.8K
Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.
5.8K