Статья

Heterogeneous growth mechanism of ZnO nanostructures and the effects of their morphology on optical and photocatalytic properties

Abdo HezamCentre for Materials Science and Technology, University of Mysore, Vijana Bhavana, P.B.No.21, Manasagangothiri, Mysuru-570006, IndiaK. NamrathaCentre for Materials Science and Technology, University of Mysore, Vijana Bhavana, P.B.No.21, Manasagangothiri, Mysuru-570006, IndiaQ.A. DrmoshCenter of Research Excellence in Nanotechnology and Physics Department, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi ArabiaBananakere Nanjegowda ChandrashekarDepartment of Materials Science and Engineering and Shenzhen Key Laboratory of Nanoimprint Technology, Southern University of Science and Technology, Shenzhen 518055, P. R. ChinaKishor Kumar SadasivuniDepartment of Mechanical& industrial Engineering, Qatar University, P.O. Box 2713, Doha, QatarZain H. YamaniCenter of Research Excellence in Nanotechnology and Physics Department, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi ArabiaChun ChengDepartment of Materials Science and Engineering and Shenzhen Key Laboratory of Nanoimprint Technology, Southern University of Science and Technology, Shenzhen 518055, P. R. ChinaK. ByrappaCentre for Materials Science and Technology, University of Mysore, Vijana Bhavana, P.B.No.21, Manasagangothiri, Mysuru-570006, India

2017en

ABI

Аннотация

Zinc oxide (ZnO) nanoflowers have huge potential for various applications. However, the growth mechanism of ZnO nanoflowers is still under debate despite various growth mechanisms having been proposed. The aim of this study is to investigate the growth mechanism of different morphologies in a single sample; hopefully, this might help to understand the exact growth mechanism of ZnO nanoflowers. Herein, two models are proposed: (I) the growth mechanism of different morphologies (shapes) in a single sample; and (II) the growth mechanism of different sized ZnO flowers in a single sample. The present work also investigates the mechanism for how morphology assists in tuning the properties of nanomaterials, which is still unclear to date. New insight into the relationship between morphology and native defects has been introduced in this work. XPS, photoluminescence, and FT-IR analyses reveal the presence of oxygen vacancy defects in the structures of the materials prepared, with respect to their morphology. These defects act as self-dopants. Therefore, a change in their concentration results in tuning the band gap and thereby the photocatalytic activity.

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Идентификаторы

DOI: 10.1039/c7ce00609h

Цитирования и источники

Цитирований: 2Использованных источников: 0

Показатели — AkademScholar