TY - JOUR

T1 - Zinc oxide nanoobjects for dye removal: Effective photocatalyst design via oriented attachment process

AU - Мешина, Ксения Ильинична

AU - Барабанов, Никита Максимович

AU - Ткаченко, Дмитрий

AU - Воронцов-Вельяминов, Павел Николаевич

AU - Бобрышева, Наталья Петровна

AU - Вознесенский, Михаил Андреевич

AU - Осмоловский, Михаил Глебович

AU - Осмоловская, Ольга Михайловна

N1 - Page 14. The work was financially supported by the Russian Science Foundation, project No. 23-23-00220, https://rscf.ru/en/project/23-23-00220/. Scientific research was performed using the St. Petersburg State University Research Park equipment: Centre for X-ray Diffraction Studies, Chemical Analysis and Materials Research Centre, Centre for Innovative Technologies of Composite Nanomaterials, Centre for Physical Methods of Surface Investigation, Centre for Optical and Laser Materials Research, Computing Centre, Centre for Diagnostics of Functional Materials for Medicine, Pharmacology and Nanoelectronics, and Interdisciplinary Resource Centre for Nanotechnology. In commemoration of the 300th anniversary of Saint Petersburg State University's founding.

PY - 2025/3/1

Y1 - 2025/3/1

N2 - The study focuses on establishing the suitable shape of ZnO nanoobjects by initiating oriented attachment (OA) process for inexpensive and eco-friendly photocatalytic decomposition of dyes. A special design of a chemical experiment was used to initiate the formation of ZnO nanosheets and nanoflowers by implementing the OA process in different conditions. The OA process taking place during the formation of ZnO nanoobjects was analysed using a complex of methods, including XRD, WPPM, FT-IR, SEM, TEM, BET, XPS and Raman spectroscopy. Special attention was paid to a specially designed computational experiment, in which the OA process was considered from the point of view of the interactions between crystallite surfaces and between a crystallite surface and ions in the reaction medium. It was established that changing the ratio of facets by regulating the OA process can significantly improve photocatalytic activity by influencing the formation processes of the activated complex and reactive oxygen species on different facets. The best photocatalytic activity was achieved for ZnO nanosheets (97 % after 90 min of visible light irradiation). ZnO nanoobjects obtained in this study were found to be non-toxic.

AB - The study focuses on establishing the suitable shape of ZnO nanoobjects by initiating oriented attachment (OA) process for inexpensive and eco-friendly photocatalytic decomposition of dyes. A special design of a chemical experiment was used to initiate the formation of ZnO nanosheets and nanoflowers by implementing the OA process in different conditions. The OA process taking place during the formation of ZnO nanoobjects was analysed using a complex of methods, including XRD, WPPM, FT-IR, SEM, TEM, BET, XPS and Raman spectroscopy. Special attention was paid to a specially designed computational experiment, in which the OA process was considered from the point of view of the interactions between crystallite surfaces and between a crystallite surface and ions in the reaction medium. It was established that changing the ratio of facets by regulating the OA process can significantly improve photocatalytic activity by influencing the formation processes of the activated complex and reactive oxygen species on different facets. The best photocatalytic activity was achieved for ZnO nanosheets (97 % after 90 min of visible light irradiation). ZnO nanoobjects obtained in this study were found to be non-toxic.

KW - DFT

KW - Nanoparticles

KW - Oriented attachment

KW - Photocatalysis

KW - Zinc oxide

UR - https://www.mendeley.com/catalogue/11ac298c-8b04-3e63-953c-3a1a68e5fec2/

U2 - 10.1016/j.surfin.2025.106006

DO - 10.1016/j.surfin.2025.106006

M3 - Article

VL - 60

JO - Surfaces and Interfaces

JF - Surfaces and Interfaces

SN - 2468-0230

M1 - 106006

ER -