Mistewicz Krystian, Kępińska Mirosława, Nowak Marian, Sasiela Agnieszka, Zubko Maciej, Stróż Danuta
Institute of Physics-Center for Science and Education, Silesian University of Technology, 40-019 Katowice, Poland.
Institute of Materials Engineering, Faculty of Science and Technology, University of Silesia, 41-500 Chorzów, Poland.
Materials (Basel). 2020 Oct 28;13(21):4803. doi: 10.3390/ma13214803.
Piezocatalysis is a novel method that can be applied for degradation of organic pollutants in wastewater. In this paper, ferroelectric nanowires of antimony sulfoiodide (SbSI) have been fabricated using a sonochemical method. Methyl orange (MO) was chosen as a typical pollutant, as it is widely used as a dye in industry. An aqueous solution of MO at a concentration of 30 mg/L containing SbSI nanowires (6 g/L) was subjected to ultrasonic vibration. High degradation efficiency of 99.5% was achieved after an extremely short period of ultrasonic irradiation (40 s). The large reaction rate constant of 0.126(8) s was determined for piezocatalytic MO decomposition. This rate constant is two orders of magnitude larger than values of reaction rate constants reported in the literature for the most efficient piezocatalysts. These promising experimental results have proved a great potential of SbSI nanowires for their application in environmental purification and renewable energy conversion.
压电催化是一种可用于降解废水中有机污染物的新方法。在本文中，采用声化学方法制备了硫碘锑（SbSI）铁电纳米线。甲基橙（MO）被选作典型污染物，因为它在工业中被广泛用作染料。将浓度为30 mg/L的MO水溶液与SbSI纳米线（6 g/L）混合后进行超声振动。在极短的超声辐照时间（40 s）后，降解效率高达99.5%。测定了压电催化MO分解的大反应速率常数为0.126(8) s⁻¹。该速率常数比文献报道的最有效的压电催化剂的反应速率常数的值大两个数量级。这些有前景的实验结果证明了SbSI纳米线在环境净化和可再生能源转换应用方面具有巨大潜力。
