CEREGE, Aix-Marseille University, CNRS, IRD, Collège de France, Europôle Méditerranéen de L'Arbois, BP 80, 13545 Aix-en-Provence, France.
Phys Chem Chem Phys. 2011 Aug 28;13(32):14516-22. doi: 10.1039/c1cp20346k. Epub 2011 Jul 12.
The synthesis protocol for Ge-imogolite (aluminogermanate nanotubes) consists of 3 main steps: base hydrolysis of a solution of aluminum and germanium monomers, stabilization of the suspension and heating at 95 °C. The successful synthesis of these nanotubes was found to be sensitive to the hydrolysis step. The impact of the hydrolysis ratio (from n(OH)/n(Al) = 0.5 to 3) on the final product structure was examined using a combination of characterization tools. Thus, key hydrolysis ratios were identified: n(OH)/n(Al) = 1.5 for the formation of nanotubes with structural defects, n(OH)/n(Al) = 2 for the synthesis of a well crystallized Ge imogolite and n(OH)/n(Al) > 2.5 where nanotube formation is hindered. The capability of controlling the degree of the nanotube's crystallinity opens up interesting opportunities in regard to new potential applications.
Ge-imogolite（锗铝硅酸盐纳米管）的合成方案包括 3 个主要步骤：铝和锗单体溶液的碱水解、悬浮液的稳定化以及在 95°C 下加热。发现这些纳米管的成功合成对水解步骤很敏感。使用一系列表征工具研究了水解比（从 n(OH)/n(Al) = 0.5 到 3）对最终产物结构的影响。因此，确定了关键的水解比：n(OH)/n(Al) = 1.5 有利于形成具有结构缺陷的纳米管，n(OH)/n(Al) = 2 有利于合成结晶良好的 Ge imogolite，而 n(OH)/n(Al) > 2.5 则会阻碍纳米管的形成。控制纳米管结晶度的能力为新的潜在应用开辟了有趣的机会。
