未经处理的废水含有危险的病原体,化学品,和污染物,构成严重的公共健康威胁。如今,对环保废水处理技术的需求不断增加。最近,基于压电材料的废水处理技术由于其无创性和快速性而引起了研究人员的极大兴趣。在这里,一种高效的压电复合材料是用壳聚糖掺入铋铁氧体(BFO)纳米晶体设计的,分解污染物和消除废水中的细菌。一方面,压电BFO已显示出用于超声介导的活性氧(ROS)产生的专有压电系数。另一方面,壳聚糖描述了它的生物相容性,这不仅促进了细胞粘附,而且显着提高了超声下BFO的ROS生产能力。这两个压电单元在一个复合实体中的协同作用显示出改进的ROS产生,在软超声治疗下,在80分钟内根除罗丹明B87.8%(速率常数,k≈0.02866min-1)。进行清除剂实验后,已经发现羟基自由基是这种情况下的主要因素。Further,复合压电催化剂的可重用性通过同一实验的多次循环(五次)得到证实。复合材料的高极化率有助于通过手指敲击(〜12.05V)产生压电功率,产生大量的瞬时压电电压。此外,样品表现出显著的抗菌活性,在30分钟内根除近99%的细菌。这表明在利用与BFO结合的生物聚合物复合材料制造具有多维应用的多功能装置方面取得了重大进展。
Untreated wastewater harbors dangerous pathogens, chemicals, and pollutants, posing grave public health threats. Nowadays, there is a rising demand for eco-friendly technologies for wastewater treatment. Recently, piezoelectric materials-based wastewater treatment technology has captured considerable interest among researchers because of its noninvasiveness and rapidity. Herein, a highly efficient piezoelectric composite material is designed with chitosan-incorporated bismuth ferrite (BFO) nanocrystals, to decompose pollutants and ablate bacteria in wastewater. On one hand, piezoelectric BFO has shown exclusive piezo-coefficient for ultrasound-mediated reactive oxygen species (ROS) production. On the other hand, chitosan depicts its biocompatible nature, which not only promotes cellular adhesion but also significantly elevates the ROS production capabilities of BFO under ultrasound. The synergistic effect of these two piezoelectric units in one composite entity shows an improved ROS production, eradicating ∼87.8% of Rhodamine B within 80 min under soft ultrasound treatment (rate constant, k ≈ 0.02866 min-1). After performing the scavenger experiment, it has been found that hydroxyl radicals are the dominating factor in this case. Further, the reusability of the composite piezocatalyst is confirmed through multiple cycles (five times) of the same experiment. The high polarizability of the composite material facilitates the generation of piezoelectric power through finger tapping (∼12.05 V), producing substantial instantaneous piezo-voltage. Moreover, the sample exhibits remarkable antibacterial activity, with nearly 99% bacterial eradication within 30 min. This indicates a significant advancement in utilizing biopolymeric composites incorporated with BFO for fabricating versatile devices with multidimensional applications.