Tsay Chien-Yie, Chung Ching-Yu, Chang Chi-Jung, Chang Yu-Cheng, Chen Chin-Yi, Wu Shu-Yii
Department of Materials Science and Engineering, Feng Chia University, Taichung 40724, Taiwan.
Department of Chemical Engineering, Feng Chia University, Taichung 40724, Taiwan.
Molecules. 2024 Jun 3;29(11):2631. doi: 10.3390/molecules29112631.
The binary heterostructured semiconducting visible light photocatalyst of the iron-doped graphitic carbon nitride/bismuth molybdate (Fe-g-CN/BiMoO) composite was prepared by coupling with Fe-doped g-CN and BiMoO particles. In the present study, a comparison of structural characteristics, optical properties, and photocatalytic degradation efficiency and activity between Fe-doped g-CN particles, BiMoO particles, and Fe-g-CN/BiMoO composite was investigated. The results of X-ray diffraction (XRD) examination indicate that the hydrothermal BiMoO particles have a single orthorhombic phase and Fourier transform infrared (FTIR) spectroscopy analysis confirms the formation of Fe-doped g-CN. The optical bandgaps of the Fe-doped g-CN and BiMoO particles are 2.74 and 2.73 eV, respectively, as estimated from the Taut plots obtained from UV-Vis diffuse reflectance spectroscopy (DRS) spectra. This characteristic indicates that the two semiconductor materials are suitable for absorbing visible light. The transmission electron microscopy (TEM) micrograph reveals the formation of the heterojunction Fe-g-CN/BiMoO composite. The results of photocatalytic degradation revealed that the developed Fe-g-CN/BiMoO composite photocatalyst exhibited significantly better photodegradation performance than the other two single semiconductor photocatalysts. This property can be attributed to the heterostructured nanostructure, which could effectively prevent the recombination of photogenerated carriers (electron-hole pairs) and enhance photocatalytic activity. Furthermore, cycling test showed that the Fe-g-CN/BiMoO heterostructured photocatalyst exhibited good reproducibility and stability for organic dye photodegradation.
通过将铁掺杂的石墨相氮化碳（Fe-g-CN）与钼酸铋（BiMoO）颗粒耦合，制备了二元异质结构的半导体可见光光催化剂铁掺杂石墨相氮化碳/钼酸铋（Fe-g-CN/BiMoO）复合材料。在本研究中，对铁掺杂g-CN颗粒、BiMoO颗粒以及Fe-g-CN/BiMoO复合材料的结构特征、光学性质、光催化降解效率和活性进行了比较研究。X射线衍射（XRD）检测结果表明，水热法制备的BiMoO颗粒具有单一的正交相，傅里叶变换红外（FTIR）光谱分析证实了铁掺杂g-CN的形成。根据紫外可见漫反射光谱（DRS）谱图的Taut图估算，铁掺杂g-CN和BiMoO颗粒的光学带隙分别为2.74和2.73 eV。这一特性表明这两种半导体材料适合吸收可见光。透射电子显微镜（TEM）显微照片揭示了异质结Fe-g-CN/BiMoO复合材料的形成。光催化降解结果表明，所制备的Fe-g-CN/BiMoO复合光催化剂的光降解性能明显优于其他两种单一半导体光催化剂。这一特性可归因于异质结构纳米结构，它可以有效地阻止光生载流子（电子-空穴对）的复合并提高光催化活性。此外，循环测试表明，Fe-g-CN/BiMoO异质结构光催化剂对有机染料光降解具有良好的重现性和稳定性。
