Micron-sized Ba(Zr_xTi_1−x)O₃ particles have been prepared using the conventional solid state method, and their microstructure, morphology and piezocatalytic properties have been investigated in detail. The present study shows that Ba(Zr_0.05Ti_0.95)O₃ is a relaxor-like ferroelectric having a typical perovskite structure with existence of polar nanodomain regions at room temperature. With the increase of the degree of diffuseness γ, the piezoelectric properties increased. Also, the particles exhibit good piezocatalytic performance in degrading organic pollutants with the aid of ultrasonic vibration. The catalytic activity can be significantly improved by poling, i.e. the alignment of polarization using an applied electric field. The catalytic degradation ratio of RhB, MB and MO dyes for poled Ba(Zr_0.05Ti_0.95)O₃ particles is reached ~95%、~70% and ~65% after 90 min, respectively. Our results also reveal that the existence of polar nanodomain due to the diffuse phase transition can highly boost the catalytic activity of the Ba(Zr_0.05Ti_0.95)O₃ particles, which can be used as multifunctional catalyst for degrading organic pollutions.

使用常规固态方法制备了微米尺寸的Ba(Zr _x Ti _1-x )O ₃颗粒，并对其微观结构、形貌和压电催化性能进行了详细研究。本研究表明，Ba(Zr _0.05 Ti _0.95 )O ₃是一种类似弛豫的铁电体，具有典型的钙钛矿结构，在室温下存在极性纳米域区域。随着扩散程度γ的增加，压电性能增加。此外，该颗粒在超声波振动的帮助下在降解有机污染物方面表现出良好的压电催化性能。催化活性可以通过极化显着提高，即使用外加电场进行极化排列。RhB、MB和MO染料对极化Ba(Zr _0.05 Ti _0.95 )O ₃的催化降解率90分钟后分别达到~95%、~70%和~65%。我们的结果还表明，由于扩散相变而存在的极性纳米域可以极大地提高 Ba(Zr _0.05 Ti _0.95 )O ₃颗粒的催化活性，可用作降解有机污染物的多功能催化剂。