Synthesis, Characterization, and Photoluminescence Properties of High and Low-Temperature Dimorphs of Pb2WO5 Glass-Ceramic for Photocatalytic Application

作     者：Abdel-Hameed, S. A. M. Margha, Fatma H. Almasarawi, Ola N. Marzouk, M. A. 

作者机构：Natl Res Ctr Glass Res Dept 33 EL Bohouth St Dokki 12622 Giza Egypt Pharos Univ Alexandria Canal Mahmoudiah St Alexandria Egypt 

出 版 物：《JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS》 (J. Inorg. Organomet. Polym. Mater.)

年 卷 期：2025年

页      面：1-20页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 

基　　金：Science, Technology & Innovation Funding Authority (STDF) Egyptian Knowledge Bank (EKB) 

主　　题：Dimorphs Lead Tungstate Transition Metal Oxides Glass-ceramic Photoluminescence Photocatalyst 

摘      要：In this study, pure Pb2WO5 with its two dimorphs, high temperature (HT) and low temperature (LT) forms, were successfully crystallized via melt-quenching technique in the system PbO. WO3. Al2O3. The influence of adding definite amounts of different transition metal oxides (TMO) such as ZnO, TiO2, CuO, MnO2, and V2O5 on the crystalline structure, optical, and photocatalytic activity were investigated. X-ray diffraction revealed a high degree of crystallization of pure Pb2WO5 in undoped and ZnO, TiO2, CuO, and MnO2 -doped samples. Only the V2O5-doped sample revealed crystallization of PbWO4 beside Pb2WO5. LT- Pb2(WO5) is the preferred isomorph in the undoped and ZnO, TiO2, CuO, and MnO2 -doped samples, while HT- Pb2WO5 is preferred in the V2O5-doped sample. Scanning Electron Microscopy (SEM) depicted an undeveloped rectangular pillar with a crystal size of 400-900 nm. Energy-Dispersive X-ray Spectroscopy (EDX) analysis certifies the existence of transition metal in the crystals at the expanse of Pb ions. Photoluminescence measurements under ultraviolet (UV) excitation revealed an emission band at 470 nm for undoped sample and exhibited a series of peaks spanning from 400 nm to 620 nm for doped samples. The International Commission on Illumination (CIE) chromaticity coordinates for all the samples are situated within the blue color region of the chromaticity diagram. The undoped sample displays CIE coordinates at (0.117, 0.091), corresponding to a deep blue hue;while the doped samples are shifted towards the light blue area of the chromaticity diagram. Utilizing ultraviolet-visible (UV-Vis) diffused reflectance, the optical bandgap energy (Eopt) for all glass-ceramic samples was estimated, revealing values within the semiconductor range (2.52-3.01 eV). Photocatalytic activity, evaluated through methyl orange (MO) degradation under UV light. The undoped sample revealed a higher degradation efficiency (33.7% after 3 h). This study is thus considered a significant step to