(中南大学 粉末冶金国家重点实验室，长沙 410083)
摘 要: 采用固相法制备NaNbO3微米粉末，研究其压电催化特性。采用XRD检测NaNbO3微米粉末的相结构；利用PFM分析NaNbO3粉末的压电响应；使用超声的方式施加应力，测试NaNbO3粉末降解染料罗丹明B的压电催化能力。结果表明：NaNbO3微米粉末的空间群结构为P21ma，属于铁电相，具有多畴结构和明显的极化反转行为；在200 W超声功率和40 kHz的超声频率下，随着时间的延长，罗丹明B溶液浓度逐渐降低，在120 min时降解度高达94.8%。
关键字: 压电催化；压电陶瓷；NaNbO3微米粉末；罗丹明B
（State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China）
Abstract:Piezoelectric catalysis uses the inverse piezoelectric effect of piezoelectric materials to generate electric charges to carry out catalytic reactions. NaNbO3 micron powder was prepared by solid-phase method, and its space group was P21ma by XRD, which is a ferroelectric phase. The PFM test proved that it has piezoelectric response. Using ultrasound to apply external force to test its piezoelectric catalytic ability to degrade the dye Rhodamine B. The results show that under ultrasonic power of 200 W, with the increase of time, the concentration of Rhodamine B solution decreases, and the degradation degree is as high as 94.8% at 120 min.
Key words: piezoelectric catalysis; piezoelectric ceramic; NaNbO3 micron powder; Rhodamine B
