Margha Fatma H, Radwan Emad K, Badawy Mohamed I, Gad-Allah Tarek A
Glass Research Department, National Research Centre, 33 El Bohouth St., Dokki, 12622 Giza, Egypt.
Water Pollution Research Department, National Research Centre, 33 El Bohouth St., Dokki, 12622 Giza, Egypt.
ACS Omega. 2020 Jun 10;5(24):14625-14634. doi: 10.1021/acsomega.0c01307. eCollection 2020 Jun 23.
Glass and glass-ceramic materials containing photoactive and magnetic crystalline phases were prepared from FeO and BiO using the conventional melt method. All samples were characterized in terms of formed phases, morphological analyses, optical properties, and magnetic properties. Formation of the photoactive tetragonal β- and body-centered cubic γ-BiO phases along with the magnetic BiFeO and FeO phases was revealed. However, the crystalline structure relied on the composition and the applied heat-treatment time. β-/γ-BiO transformation could be controlled by the heat-treatment time. The samples exhibited variable magnetic properties depending on their composition. All of the samples showed excellent absorbance in visible light with an optical band gap of 1.90-2.22 eV, making them ideal for solar-light-driven photocatalysis. The best performance was recorded for the sample containing equal amounts of FeO and BiO due to the formation of γ-BiO/BiFeO heterojunction in this sample.
采用传统熔融法，以FeO和BiO制备了含有光活性和磁性晶相的玻璃及玻璃陶瓷材料。对所有样品的形成相、形态分析、光学性能和磁性能进行了表征。结果表明，形成了光活性四方β相和体心立方γ - BiO相以及磁性BiFeO和FeO相。然而，晶体结构取决于组成和所施加的热处理时间。β-/γ - BiO转变可通过热处理时间来控制。样品根据其组成表现出可变的磁性能。所有样品在可见光下均表现出优异的吸光度，光学带隙为1.90 - 2.22 eV，使其成为太阳光驱动光催化的理想材料。由于该样品中形成了γ - BiO/BiFeO异质结，含有等量FeO和BiO的样品表现出最佳性能。
