• 作者： 楊鐘松，高國益
• 作者服務機構： Department of Applied Chemistry, National Chia Yi University, Chia Yi 60083, Taiwan, R.O.C.
• 中文摘要： In this paper we present aluminum phosphate nanocrystals, prepared by a hydrothermal reaction, using amphiphilic triblock copolymer F127 [(EO)106(PO)70(EO)106] as a morphology-directing template. By verifying the pH from 10 to 12, the morphology progression of AlPO4 nanocrystals from nanoparticles to nanoparticle-aggregated nanowires, and finally to multi-strand nano-ropes, was successfully demonstrated. The most influential factors in the morphology process were the initial pH level, the participation of surfactant-template F127, and the change in pH during the reaction. We proposed a pH-dependent model to illustrate both the growth of AlPO4 nanocrystals inside F127 amphiphilic domains and the chemical driving force that aggregated the nanoparticles into chain-shaped nanowires. The incorporation of water molecules as H-bonding linkers, to combine single nanowires into multi-strand nano-ropes, is also discussed in this model. Powder X-ray diffraction (XRD) patterns of the nanoparticle-aggregated nanowires and multi-strand nano-ropes were consistent with a mixed phase of berlinite and cristobalite structures, corresponding to the low-temperature form (a-form), while the AlPO4 nanoparticles showed a pure berlinite phase only.
• 英文摘要： --
• 中文關鍵字： Nanoparticles; Nanowires; Zeolite; Hydrothermal reaction; Triblock copolymers.
• 英文關鍵字： --