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Reverse microemulsion synthesis of layered gadolinium hydroxide nanoparticles

Xu, Y; Suthar, J; Egbu, R; Weston, AJ; Fogg, AM; Williams, GR; (2018) Reverse microemulsion synthesis of layered gadolinium hydroxide nanoparticles. Journal of Solid State Chemistry , 258 pp. 320-327. 10.1016/j.jssc.2017.10.031.

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A reverse microemulsion approach has been explored for the synthesis of layered gadolinium hydroxide (LGdH) nanoparticles in this work. This method uses oleylamine as a multifunctional agent, acting as surfactant, oil phase and base. 1-butanol is additionally used as a co-surfactant. A systematic study of the key reaction parameters was undertaken, including the volume ratio of surfactant (oleylamine) to water, the reaction time, synthesis temperature, and the amount of co-surfactant (1-butanol) added. It proved possible to obtain pristine LGdH materials at temperatures of 120 °C or below with an oleylamine: water ratio of 1:4. Using larger amounts of surfactant or higher temperatures caused the formation of Gd(OH)3, either as the sole product or as a major impurity phase. The LGdH particles produced have sizes of ca. 200 nm, with this size being largely independent of temperature or reaction time. Adjusting the amount of 1-butanol co-surfactant added permits the size to be varied between 200 and 300 nm.

Type: Article
Title: Reverse microemulsion synthesis of layered gadolinium hydroxide nanoparticles
DOI: 10.1016/j.jssc.2017.10.031
Publisher version: http://doi.org/10.1016/j.jssc.2017.10.031
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Layered gadolinium hydroxide; reverse microemulsion; nanoparticles; oleylamine
URI: http://discovery.ucl.ac.uk/id/eprint/10033978
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