Morphological evolution of ZnO microspheres from Zn5(OH)8Ac2·2H2O by ultrasonic irradiation method

Liu, H. R.; Shao, Gang; Jia, Wei; Zhang, Z. X.; Zhang, Y.; Liang, Jia; Liu, X. G.; Jia, Husheng; Xu, Bingshe

doi:10.1039/c2ce26247a

Cited by 8 publications

(2 citation statements)

References 43 publications

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“…During ultrasonic irradiation, the formation and collapse of bubbles in the aqueous phase results in localized extremely high temperatures (45000 K), high pressures (420 MPa) and very high cooling rates (10 10 K s À1 ), which can supply enough energy to drive the formation of spherical metal oxide structures. 144 Various metal oxide spherical particles such as ZnO hollow nanospheres of size B80 nm, 239 mesoporous NiO hollow spheres, 149 MnO 2 spheres made of interconnected nanoflakes, 21 ZnO spheres with bimodal pores at 25 nm and 180 nm, 134 CuO hollow spheres, 144 composite Ag 2 O-MnO 2 spheres with Ag 2 O residing at the end of MnO 2 nanowires, 19 and WO 3 spheres 130 were synthesized that way.…”

Section: Other Methodsmentioning

confidence: 99%

“…127 An increase in the ratio of the structure directing agent (SDA) to the metal precursor improved the sphericity of particles such as ZnO, 56,185 SnO 2 , 125 and Bi 2 WO 6 spheres 24 as well as a-Fe 2 O 3 multi-shell hollow spheres 87 because SDA acted as a capping agent and prevented uncontrolled aggregation, although an excess of SDA can be detrimental to the crystallinity 118 or development of the structures. 24 Moreover, this ratio has also been used to control the size and morphology of particles such as NiO, 43 Y 2 O 3 , 261 ZnO, 134 ZnCo 2 O 4 @CeO 2 , 133 Bi 2 O 3 , 23 SnO 2 48 and Co 3 O 4 . 28 Conversely, the effect of the change in the precursor concentration while keeping the overall ratio constant has been examined in the low temperature precipitation of ZnO hollow spheres using HMT at a 1 : 1 ratio.…”

Section: Solvents and Reactantsmentioning

confidence: 99%

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Synthesis and applications of porous non-silica metal oxide submicrospheres

et al. 2016

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Nowadays the development of submicroscale products of specific size and morphology that feature a high surface area to volume ratio, well-developed and accessible porosity for adsorbates and reactants, and are non-toxic, biocompatible, thermally stable and suitable as synergetic supports for precious metal catalysts is of great importance for many advanced applications. Complex porous non-silica metal oxide submicrospheres constitute an important class of materials that fulfill all these qualities and in addition, they are relatively easy to synthesize. This review presents a comprehensive appraisal of the methods used for the synthesis of a wide range of porous non-silica metal oxide particles of spherical morphology such as porous solid spheres, core-shell and yolk-shell particles as well as single-shell and multi-shell particles. In particular, hydrothermal and low temperature solution precipitation methods, which both include various structure developing strategies such as hard templating, soft templating, hydrolysis, or those taking advantage of Ostwald ripening and the Kirkendall effect, are reviewed. In addition, a critical assessment of the effects of different experimental parameters such as reaction time, reaction temperature, calcination, pH and the type of reactants and solvents on the structure of the final products is presented. Finally, the practical usefulness of complex porous non-silica metal oxide submicrospheres in sensing, catalysis, biomedical, environmental and energy-related applications is presented.

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