Structure and properties of cerium phosphate and silicophosphate glasses

Abstract

We report on the fabrication, properties, and structure of cerium pyrophosphate glasses and partially substituted cerium silicophosphates. In those glasses, cerium occurs predominantly as Ce(III). A combination of dynamic nuclear magnetic resonance and electrical impedance spectroscopy is used to overcome the problem of assessing cerium speciation. While optical spectroscopy is unable to quantify the ratio of Ce(III)/Ce(IV) due to spectral overlap, proxy observations of the effect of silica‐for‐cerium substitution on optical extinction and the shape and width of the UV band gap corroborate vibrational spectroscopic data of the structural roles of cerium and silica. While silica bonding to phosphate units appears to stabilize Ce(IV), it also impedes the polaron transport, leading to higher polaron activation energy and lower electronic conductivity. On the other hand, Ce(III) is stabilized by coordinating to P = O.

Hydrothermally Synthesized Cerium Phosphate with Functionalized Carbon Nanofiber Nanocomposite for Enhanced Electrochemical Detection of Hypoxanthine

“…Chemosensors 2024, 12,84 spectroscopy is also able to identify surface sites that influence the m To observe the interactions between cerium phosphate and function fiber, the FT-IR technique was employed to analyze the chemical str CNF, and the CePO4@f-CNF composite, shown in Figure 1C, with a cm −1 . f-CNFs exhibited IR bands ranging between 400 to 2000 cm −1 , w to the stretching wavelengths of -CH, and C-O [11] in the FTIR spect to the bending vibration of the PO4 bands obtained between 530-6 sponding to the stretching vibrations of the PO4 bands visible between In the O-H group of organic compounds, a peak is observed at near may represent an indication of moisture absorption.…”

“…Lanthanides have specific electronic structures and similar inner 4f electronic energy levels [12]. Among the lanthanide compounds, Cerium phosphate (CePO 4 ) has remarkable properties, which include stability, nontoxicity, huge surface area, and good ion conductivity.…”