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DS: Fachverband Dünne Schichten

DS 10: Thin Film Application

DS 10.3: Talk

Wednesday, March 20, 2024, 15:30–15:45, A 060

Piezoelectricity enhances MoSe2 nanofowers adsorption of the antibacterial dye malachite green under sonication — •Jinzhu Wu — Harbin Institute of Technology, Harbin, China

Nanoscale piezoelectrics have recently found applications in radios, switches, tweezers, sensors, actuators, feld efect transistors and piezoelectric-gated diodes. Piezoelectrics may also be used to adsorb and efciently degrade pollutants, yet knowledge is actually scarce. Two-dimensional transition metal dichalcogenides were recently found to be piezoelectric. Here, MoSe2 nanofowers were synthesized by the hydrothermal method then used to adsorb the malachite green dye, an antifungal and antibacterial agent for aquaculture. Results show very high dye adsorption, of 85% within 5 s under sonication, with a theoretical maximum adsorption capacity of 208.3 mg/g.This is explained by spontaneous physisorption via pai-pai stacking interactions between aromatic malachite green and electron-rich MoSe2 nanofowers. For the frst time, this work clarifes that the piezoelectric efect of the few-layered MoSe2 nanofowers triggered by the ultrasonic vibration is a driven force for outstanding adsorption.

Keywords: Piezoelectric efect; MoSe2; Adsorption · Nanomaterial