Next Article in Journal
Design and Characterization of Microscale Auxetic and Anisotropic Structures Fabricated by Multiphoton Lithography
Next Article in Special Issue
In Situ Local Oxidation of SnO Induced by Laser Irradiation: A Stability Study
Previous Article in Journal
Polarization Anisotropies in Strain-Free, Asymmetric, and Symmetric Quantum Dots Grown by Droplet Epitaxy
Previous Article in Special Issue
Evaluation of the Nanodomain Structure in In-Zn-O Transparent Conductors
Article

Towards Control of the Size, Composition and Surface Area of NiO Nanostructures by Sn Doping

1
Departamento de Física de Materiales, Facultad de Ciencias Físicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
2
Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
3
School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
*
Author to whom correspondence should be addressed.
Academic Editor: Cinzia Sada
Nanomaterials 2021, 11(2), 444; https://doi.org/10.3390/nano11020444
Received: 26 January 2021 / Revised: 5 February 2021 / Accepted: 7 February 2021 / Published: 10 February 2021
(This article belongs to the Special Issue Functional Inorganic Nanomaterials)
Achieving nanostructures with high surface area is one of the most challenging tasks as this metric usually plays a key role in technological applications, such as energy storage, gas sensing or photocatalysis, fields in which NiO is gaining increasing attention recently. Furthermore, the advent of modern NiO-based devices can take advantage of a deeper knowledge of the doping process in NiO, and the fabrication of p-n heterojunctions. By controlling experimental conditions such as dopant concentration, reaction time, temperature or pH, NiO morphology and doping mechanisms can be modulated. In this work, undoped and Sn doped nanoparticles and NiO/SnO2 nanostructures with high surface areas were obtained as a result of Sn incorporation. We demonstrate that Sn incorporation leads to the formation of nanosticks morphology, not previously observed for undoped NiO, promoting p-n heterostructures. Consequently, a surface area value around 340 m2/g was obtained for NiO nanoparticles with 4.7 at.% of Sn, which is nearly nine times higher than that of undoped NiO. The presence of Sn with different oxidation states and variable Ni3+/Ni2+ ratio as a function of the Sn content were also verified by XPS, suggesting a combination of two charge compensation mechanisms (electronic and ionic) for the substitution of Ni2+ by Sn4+. These results make Sn doped NiO nanostructures a potential candidate for a high number of technological applications, in which implementations can be achieved in the form of NiO–SnO2 p-n heterostructures. View Full-Text
Keywords: nickel oxide; nanoparticles; nanosticks; high surface area; doping mechanisms nickel oxide; nanoparticles; nanosticks; high surface area; doping mechanisms
Show Figures

Figure 1

MDPI and ACS Style

Taeño, M.; Maestre, D.; Ramírez-Castellanos, J.; Li, S.; Lee, P.S.; Cremades, A. Towards Control of the Size, Composition and Surface Area of NiO Nanostructures by Sn Doping. Nanomaterials 2021, 11, 444. https://doi.org/10.3390/nano11020444

AMA Style

Taeño M, Maestre D, Ramírez-Castellanos J, Li S, Lee PS, Cremades A. Towards Control of the Size, Composition and Surface Area of NiO Nanostructures by Sn Doping. Nanomaterials. 2021; 11(2):444. https://doi.org/10.3390/nano11020444

Chicago/Turabian Style

Taeño, María, David Maestre, Julio Ramírez-Castellanos, Shaohui Li, Pooi S. Lee, and Ana Cremades. 2021. "Towards Control of the Size, Composition and Surface Area of NiO Nanostructures by Sn Doping" Nanomaterials 11, no. 2: 444. https://doi.org/10.3390/nano11020444

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop