Hydrothermal synthesis and characterization of mesoporous zinc selenide agglomerates by nitrogen bubble templates

► Mesoporous ZnSe was successfully synthesized by adopting a ‘green’ chemistry-water as solvent reaction system. ► By controlling the pH, the ZnSe agglomerates with irregular, coral-like and litchi-like patterns of were obtained. ► The formation rate and moving speed of N 2 bubbles influence the mor...

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Bibliographic Details
Published in:Journal of alloys and compounds 2011-06, Vol.509 (25), p.7009-7015
Main Authors: Lin, Hung-Yin, Wei, Jyh-Ding, Ou, Chia-Chih, Lu, Jin-Wei, Tsai, Chen-Yi, Lee, Mei-Hwa
Format: Article
Language:English
Subjects:
Agglomerates
Hydrates
Hydrazines
Hydrothermal synthesis
Mesoporous material
Morphology
Nanoparticles
Nanorods
Nanostructure
Zinc selenide
Zinc selenides
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Summary:► Mesoporous ZnSe was successfully synthesized by adopting a ‘green’ chemistry-water as solvent reaction system. ► By controlling the pH, the ZnSe agglomerates with irregular, coral-like and litchi-like patterns of were obtained. ► The formation rate and moving speed of N 2 bubbles influence the morphology of the ZnSe agglomerates. ► This work represents the first case of lichi-like and coral-like mesoporous ZnSe structures reported in the literature. Mesoporous coral-like and litchi-like zinc selenide agglomerates were successfully synthesized with sodium selenite and zinc acetate dihydrate as precursors by adding hydrazine hydrate using the hydrothermal method. The experimental parameters were varied and hard agglomerates of small nanoparticles were observed. Increasing amounts of hydrazine hydrate were added to control the pH values of the reaction system. The effective control of the morphology and size of the ZnSe nanopores agglomerates by varying the pH was also demonstrated. The N 2 bubble templates produced provided the aggregation centers during the reaction, and then result in agglomerates of the small ZnSe nanoparticles with mesopores. The litchi-like zinc selenide has two different morphologies, including hollow spherical agglomerates comprising of 4–8 nm diameter nanoparticles and 15–25 nm diameter nanorods. The coral-like ZnSe mesoporous structure has a very high specific surface area of 129 m 2/g and an emission band at 626 nm as measured by a photoluminescence (PL).
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2011.04.022