School of Chemical Engineering, Hanoi University of Science and Technology, No. 1 Dai Co Viet, Hanoi, 10000, Vietnam.
International Institute for Materials Science, Hanoi University of Science and Technology, No. 1 Dai Co Viet, Hanoi, 10000, Vietnam.
J Nanosci Nanotechnol. 2021 Apr 1;21(4):2692-2701. doi: 10.1166/jnn.2021.19097.
For the first time, the BaTiO₃ nano-sized particles were obtained through solid-state reaction by employing the titanium oxide nanoparticle. Meanwhile, by using TiO₂ with micro-sized particles, the synthesized BaTiO₃ shows the micro-sized. The XRD pattern confirms that both BaTiO₃ nano-sized and micro-sized particles display the tetragonal structure. Both SEM and TEM analysis revealed that the size of the nano-sized material is in the range of 30-50 nm; in the meantime, the microsized material shows a size of 500 nm. The Eg of both BaTiO₃ micro-sized and nano-sized were calculated by using the Kubelka-Munk function. The shifted bandgap of BaTiO₃ nano-sized particle is nearly 0.24 eV larger than that of BaTiO₃ miro-sized particle due to the particle size effect. The P-E measurement of n-BaTiO₃ proved that the obtained BaTiO₃ nano-sized is ferroelectric material. The result may provide a new route for the fabrication of barium titanate nanoparticle with ferroelectric properties.
首次通过采用纳米二氧化钛粒子的固态反应得到了 BaTiO₃纳米粒子。同时，使用微米级 TiO₂ 粒子合成的 BaTiO₃呈现出微米级。XRD 图谱证实了 BaTiO₃纳米和微米颗粒均呈现出四方结构。SEM 和 TEM 分析均表明纳米材料的尺寸在 30-50nm 之间；同时，微米级材料的尺寸为 500nm。通过使用 Kubelka-Munk 函数计算了 BaTiO₃ 微纳米颗粒的 Eg。由于粒径效应，BaTiO₃纳米颗粒的能带隙偏移了近 0.24eV，大于 BaTiO₃ 微米颗粒。n-BaTiO₃ 的 P-E 测量证明了所获得的 BaTiO₃ 纳米颗粒是铁电材料。该结果可能为制备具有铁电性能的钛酸钡纳米颗粒提供了一条新途径。
