Ba2TiMnO6 two-dimensional nanosheets for rhodamine B organic contaminant degradation using ultrasonic vibrations

Abstract

Piezocatalyst Ba₂TiMnO₆ nanosheets (BTMO NS) were successfully synthesized using a hydrothermal process. Two-dimensional (2D) BTMO NS exhibited an outstanding piezocatalytic performance as compared to other piezocatalysts for rhodamine B organic contaminant degradation using ultrasonic vibrations. The piezocatalytic output of the BTMO nanosheets approached approximately 99% after 180 minutes with a degradation rate of 0.022 min⁻¹. Our experimental findings suggest that BTMO experiences a simple flexing deformation that can lead to an increased piezoelectric potential of 10.2 volts. In addition, the free surface carrier content is increased due to the existence of sufficient surface oxygen vacancies (V_O), which can often be powered by piezoelectric potential and afterwards are engaged in the production of radical species throughout the piezocatalytic process. The hydroxyl radical (˙OH) forms an active site and originates primarily from the conversion of superoxides (˙O²⁻). This work provides a clear discription of the piezocatalytic process, and it also elucidates a viable approach for wastewater treatment using novel piezocatalytic material.