Evaluation of the Valence Band Maximum of Hematite Particles Dispersed in Aqueous Solution: An Approach Using Photoemission Yield Spectroscopy in Air.

ABSTRACT: Surface electronic states in aqueous solutions affect many properties of materials used in aqueous solutions, for example, the reactivity of photocatalysts. Therefore, evaluation of the surface electronic states is a coveted objective for developing such materials. Although several methods to evaluate surface electronic states in aqueous solutions have been developed, those methods entail difficulties; electrochemical impedance spectroscopy (EIS) requires electrode fabrication, and photoelectron spectroscopy requires synchrotron radiation. Herein, we present the first successful application of photoemission yield spectroscopy in air (PYSA) as a method to evaluate the surface electronic states of particles in aqueous solution. This method is simple and easily accessible in a laboratory. PYS

SUBMITTER: Kinoshita M 

PROVIDER: S-EPMC12676315 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature