pH dependent ZnO nanostructures synthesized by hydrothermal approach and surface sensitivity of their photoelectrochemical behavior

0520585 - ÚFCH JH 2021 RIV DE eng J - Journal Article
Sakata, Kaoruho - Minhová Macounová, Kateřina - Nebel, Roman - Krtil, Petr
pH dependent ZnO nanostructures synthesized by hydrothermal approach and surface sensitivity of their photoelectrochemical behavior.
SN Applied Sciences. Roč. 2, č. 2 (2020), č. článku 203. ISSN 2523-3963
R&D Projects: GA ČR(CZ) GA17-12800S
Institutional support: RVO:61388955
Keywords : ZnO * nanoparticle * hydrothermal synthesis
OECD category: Physical chemistry
Method of publishing: Limited access

Nanoparticulate ZnO materials were fabricated using microwave assisted hydrothermal synthesis from mixture of zinc
acetate and ammonia at variable pH. The particle size and shape of resulting materials changes with the pH of precursor
solution. The obtained nanoparticulate ZnO are of single phase nature with particle size ranging between 100 and
3000 nm, and are photoelectrochemically active in water oxidation upon UV illumination. Their photoelectrochemical
activity, depends primarily on the ZnO particle surface orientation which changes with the particle size. The highest
photoelectrochemical activity results from simultaneous presence of {0− 110} and {− 2110} oriented faces. The presence
of {0001} oriented faces apparently suppresses the photoelectrochemical activity. The results indicate that the photoelectrochemical
activity of ZnO is mainly related to a presence of {0−110} oriented surface.
Permanent Link: http://hdl.handle.net/11104/0306776