论文标题
混合价值双植物的结构，物理和光催化特性Ba $ _ {2} $ pr（bi，sb）o $ $ _ {6} $由柠檬酸酸盐Pyrolysis Technique合成的半导体
Structural, physical and photocatalytic properties of mixed-valence double-perovskite Ba$_{2}$Pr(Bi,Sb)O$_{6}$ semiconductor synthesized by citrate pyrolysis technique
论文作者
论文摘要
我们演示了b site取代的双ply perovskite ba $ _ {2} $ pr（bi $ _ {1-x} $ sb $ _ {x} $ $ $ $ _ {6} $（$ x $ = 0，0.1，0.2，0.2，0.5和1.0）的晶体结构，磁性，光学和光催化特性。带有光SB替代的单相多晶样品以单斜结构结晶（$ i2/m $）。所有样品上的磁化测量结果表明，有效的磁性矩位于3 $μ_{B} $左右，表明pr $^{3+} $和pr $^{4+} $之间的价混合状态。从光学测量中估计了两个最终成员的带隙能量的幅度。 $ x $ = 1.0。 Ba $ _ {2} $ pr（bi $ _ {1-x} $ sb $ _ {x} $）o $ $ _ {6} $（$ x $ = 0和0.1）由本技术获得的粉末与常规固态方法相比，当前技术与同一化合物相比，本技术获得了增强的光催化活性。我们的发现表明，较高的光催化活性在很大程度上取决于粉末制备方法以及带隙和电荷分离。
We demonstrated crystal structures, magnetic, optical, and photocatalytic properties of the B-site substituted double perovskite Ba$_{2}$Pr(Bi$_{1-x}$Sb$_{x}$)O$_{6}$ ($x$=0, 0.1, 0.2, 0.5 and 1.0) synthesized by the citrate pyrolysis method. The single-phase polycrystalline samples with the light Sb substitution crystallized in a monoclinic structure ($I2/m$). Magnetization measurements on all the samples showed that the effective magnetic moments are located around 3 $μ_{B}$ , indicating the valence mixing states between Pr$^{3+}$ and Pr$^{4+}$.The magnitudes of band gap energy for the two end member samples were estimated from the optical measurements to be $E_{g}$ =1.06 eV at $x$=0 and 2.71 eV at $x$=1.0. The Ba$_{2}$Pr(Bi$_{1-x}$Sb$_{x}$)O$_{6}$ ($x$=0, and 0.1) powders obtained by the present technique exhibited enhanced photocatalytic activities when compared to the same compounds prepared by the conventional solid state method. Our findings suggest that the higher photocatalytic activities strongly depend on powder preparation method as well as the band gaps and charge separation.
