Issue 3, 2007

Morphology evolution of GaPO4 mesocrystals in a nonionic triblock copolymer system by pH-dependent control

Abstract

In the synthesis of gallium phosphate, GaPO4, crystals via a hydrothermal route, using amphiphilic triblock copolymer F127, [(EO)106(PO)70(EO)106]–OH, as a surfactant-template, a pH-dependent morphology evolution is observed in the progress of crystal growth. By altering the initial pH level from 7.34 to 11.54, the morphology of crystals is varied from the mesoscale assembly of nanoparticles with porosity, so-called porous mesocrystals, to colloidal crystalline nanoparticles. Thus far, the porous GaPO4 mesocrystals created by self-assembled nanoparticles, is reported for the first time. The typical pore size distribution of porous GaPO4 mesocrystals derived from the adsorption branch by the Barrett–Joyner–Halenda (BJH) model ranges from 1.0 to 3.5 nm with a major distribution peak centered at 2.5 nm.

Graphical abstract: Morphology evolution of GaPO4 mesocrystals in a nonionic triblock copolymer system by pH-dependent control

Supplementary files

Article information

Article type
Paper
Submitted
14 Nov 2006
Accepted
01 Dec 2006
First published
12 Jan 2007

New J. Chem., 2007,31, 363-369

Morphology evolution of GaPO4 mesocrystals in a nonionic triblock copolymer system by pH-dependent control

C. Yang, C. Chen and X. Lin, New J. Chem., 2007, 31, 363 DOI: 10.1039/B616628H

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