Related Experiment Video
Updated: Sep 11, 2025
11:59
In Situ Characterization of Boehmite Particles in Water Using Liquid SEM
Published on: September 27, 2017
9.3K
Probing the pH Effect on Boehmite Particles in Water Using Vacuum Ultraviolet Single-Photon Ionization Mass
Xiao Sui1,2, Bo Xu3, Xiao-Ying Yu1
1Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37830, USA.
International Journal of Molecular Sciences
|August 14, 2025
Summary
This study reveals complex molecular clusters at the solid-liquid interface of boehmite using vacuum ultraviolet single-photon ionization mass spectrometry (VUV SPI-MS). These findings offer new insights into boehmite dissolution and solvation mechanisms.
Area of Science:
- Materials Science
- Analytical Chemistry
- Physical Chemistry
Background:
- Boehmite is crucial in hazardous material processing.
- pH influences boehmite's interfacial properties and behavior.
- Bulk methods struggle with molecular-level detection of cluster ions.
Purpose of the Study:
- To investigate boehmite's solute molecular composition at the solid-liquid interface under varying pH.
- To characterize newly discovered solvated cluster ions and their properties.
- To elucidate pH-dependent effects on boehmite dissolution and solvation.
Main Methods:
- Utilized in situ vacuum ultraviolet single-photon ionization mass spectrometry (VUV SPI-MS).
- Employed a vacuum-compatible microreactor system for analysis at the liquid-vacuum interface (SALVI).
- Analyzed boehmite solutions across different pH conditions.
Main Results:
- Discovered more complex solute molecule clustering at the solid-liquid interface than previously assumed.
- Identified and determined the composition and appearance energies of novel solvated cluster ions.
- Quantified pH-dependent effects on boehmite and its dissolved species.
Conclusions:
- Boehmite solvation at the solid-liquid interface is more intricate than in simple aqueous solutions.
- VUV SPI-MS provides detailed molecular-level insights into pH-dependent boehmite dissolution.
- Findings aid in designing safer waste processing and storage solutions.
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