(中南大學(xué) 粉末冶金國家重點實驗室，長沙 410083)
摘 要: 采用固相法制備NaNbO3微米粉末，研究其壓電催化特性。采用XRD檢測NaNbO3微米粉末的相結(jié)構(gòu)；利用PFM分析NaNbO3粉末的壓電響應(yīng)；使用超聲的方式施加應(yīng)力，測試NaNbO3粉末降解染料羅丹明B的壓電催化能力。結(jié)果表明：NaNbO3微米粉末的空間群結(jié)構(gòu)為P21ma，屬于鐵電相，具有多疇結(jié)構(gòu)和明顯的極化反轉(zhuǎn)行為；在200 W超聲功率和40 kHz的超聲頻率下，隨著時間的延長，羅丹明B溶液濃度逐漸降低，在120 min時降解度高達94.8%。
關(guān)鍵字: 壓電催化；壓電陶瓷；NaNbO3微米粉末；羅丹明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
