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Bi2O3-BiFeO3 Glass-Ceramic: Controllable β-/γ-Bi2O3 Transformation and Application as Magnetic Solar-Driven Photocatalyst for Water Decontamination.
ACS Omega ( IF 3.7 ) Pub Date : 2020-06-10 , DOI: 10.1021/acsomega.0c01307
Fatma H Margha 1 , Emad K Radwan 2 , Mohamed I Badawy 2 , Tarek A Gad-Allah 2
ACS Omega ( IF 3.7 ) Pub Date : 2020-06-10 , DOI: 10.1021/acsomega.0c01307
Fatma H Margha 1 , Emad K Radwan 2 , Mohamed I Badawy 2 , Tarek A Gad-Allah 2
Affiliation
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Glass and glass-ceramic materials containing photoactive and magnetic crystalline phases were prepared from Fe2O3 and Bi2O3 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-Bi2O3 phases along with the magnetic BiFeO3 and Fe3O4 phases was revealed. However, the crystalline structure relied on the composition and the applied heat-treatment time. β-/γ-Bi2O3 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 Fe2O3 and Bi2O3 due to the formation of γ-Bi2O3/BiFeO3 heterojunction in this sample.
中文翻译：
Bi2O3-BiFeO3玻璃陶瓷：可控的β-/γ-Bi2O3转化及其作为磁性太阳能驱动的光净化水催化剂的应用。
使用常规熔融方法由Fe 2 O 3和Bi 2 O 3制备含有光活性相和磁性晶相的玻璃和玻璃陶瓷材料。根据形成的相，形态分析，光学性质和磁性质对所有样品进行表征。光敏四方β-和体心立方γ-Bi系的形成2个ö 3与磁性沿的BiFeO阶段3和Fe 3个ö 4相显露。但是，晶体结构取决于组成和所施加的热处理时间。β-/γ-Bi系2 ö 3转变可以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。所有样品在可见光下均表现出出色的吸收率，其光学带隙为1.90–2.22 eV，使其非常适合于太阳光驱动的光催化。最佳的性能是用于记录含有Fe的等量样品2 ö 3和Bi 2 ö 3由于形成γ-Bi系的2 ö 3 /的BiFeO 3该样品中异质结。
更新日期：2020-06-23
中文翻译：
Bi2O3-BiFeO3玻璃陶瓷：可控的β-/γ-Bi2O3转化及其作为磁性太阳能驱动的光净化水催化剂的应用。
使用常规熔融方法由Fe 2 O 3和Bi 2 O 3制备含有光活性相和磁性晶相的玻璃和玻璃陶瓷材料。根据形成的相，形态分析，光学性质和磁性质对所有样品进行表征。光敏四方β-和体心立方γ-Bi系的形成2个ö 3与磁性沿的BiFeO阶段3和Fe 3个ö 4相显露。但是，晶体结构取决于组成和所施加的热处理时间。β-/γ-Bi系2 ö 3转变可以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。所有样品在可见光下均表现出出色的吸收率，其光学带隙为1.90–2.22 eV，使其非常适合于太阳光驱动的光催化。最佳的性能是用于记录含有Fe的等量样品2 ö 3和Bi 2 ö 3由于形成γ-Bi系的2 ö 3 /的BiFeO 3该样品中异质结。
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