Piezo-Photocatalytic Decomposition of Metronidazole Using ZnO Microtetrapods under Simulated Sunlight

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Дәйексөз келтіру

Толық мәтін

Ашық рұқсат Ашық рұқсат
Рұқсат жабық Рұқсат берілді
Рұқсат жабық Тек жазылушылар үшін

Аннотация

The article presents the results of a study on the effect of ultrasonic exposure on the process of photocatalytic decomposition of metronidazole using ZnO microtetrapods under simultaneous irradiation with artificial sunlight. The synthesized zinc oxide microtetrapods had pronounced sharp tips, clear facets, and edges, indicating their high crystalline perfection. This unique morphology of ZnO microtetrapods provides the material with high catalytic activity in both photocatalytic and piezocatalytic processes. The Raman spectrum of ZnO microtetrapods showed distinct peaks corresponding to the transverse E1 and high-frequency E2h modes. The high intensity of the E2h mode indicates the crystalline perfection of ZnO microtetrapods. The enhancement of the intensity of the transverse optical mode A1 is observed at the tip of the tetrapod and is absent at the base. It has been shown that the use of ZnO microtetrapods achieves significant efficiency in the decomposition of metronidazole due to the combined effect of light and ultrasound, creating a piezoelectric field on the surface of ZnO. This piezoelectric field promotes the spatial separation of photogenerated charges and reduces the likelihood of their recombination, significantly increasing the rate of decomposition of the target pollutant. The rate constant for the decomposition of metronidazole in piezophotocatalysis is higher than the rate constants for photolysis, sonolysis, sonophotolysis, piezocatalysis, and photocatalysis by 1254, 35, 17, 8, and 4 times, respectively.

Авторлар туралы

R. Gulakhmedov

Dagestan State University

Makhachkala, Russia

D. Selimov

Dagestan State University

Makhachkala, Russia

V. Krasnova

Kurchatov Complex Crystallography and Photonics of the NRC “Kurchatov Institute”

A.V. Shubnikov Institute of Crystallography Moscow, Russia

A. Muslimov

Kurchatov Complex Crystallography and Photonics of the NRC “Kurchatov Institute”

Email: amuslimov@mail.ru
A.V. Shubnikov Institute of Crystallography Moscow, Russia

A. Larikov

Kurchatov Complex Crystallography and Photonics of the NRC “Kurchatov Institute”

A.V. Shubnikov Institute of Crystallography Moscow, Russia

V. Kanevsky

Kurchatov Complex Crystallography and Photonics of the NRC “Kurchatov Institute”

A.V. Shubnikov Institute of Crystallography Moscow, Russia

M. Rabadanov

Dagestan State University

Makhachkala, Russia

F. Orudzhev

Dagestan State University; Amirkhanov Institute of Physics DFRC RAS

Email: farid-stkha@mail.ru
Makhachkala, Russia; Makhachkala, Russia

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