碳化物修饰的有序介孔炭的制备及其催化肼分解性能

 以间苯二酚和甲醛为炭源, F127 (EO₁₀₆PO₇₀EO₁₀₆) 为结构导向剂, 在酸性水/乙醇溶液中引入 (NH₄)₆Mo₇O₂₄?4H₂O 或 (NH₄)₂WO₄ 溶液, 经静置自组装形成凝胶, 再于 N₂ 中焙烧即合成出金属碳化物修饰的有序介孔炭材料. 结果表明, 金属离子的种类和用量对碳化物的分散度和介孔炭的有序度影响很大. 通过控制金属离子的用量可制备出粒径为 3~5 nm 且高度分散在介孔炭骨架中的碳化物粒子. 与分步浸渍法相比, 一步法制备的碳化物具有更高的分散度和催化肼分解活性.

Preparation of Metal Carbide Imbedded Ordered Mesoporous Carbon and Its Catalytic Properties for N2H4 Decomposition

A metal carbide imbedded ordered mesoporous carbon (MC-OMC) material was synthesized by direct carbonization of a self-assembled composite that was made from F127 (EO₁₀₆PO₇₀EO₁₀₆), resorcinol-formaldehyde, and (NH₄)₆Mo₇O₂₄?4H₂O or (NH₄)₂WO₄ in an acidic medium of aqueous ethanol solutions. The type and amount of the metal ions have a great influence on ordering degree of the resulting materials. Metal carbide particles with uniform size of 3–5 nm are highly dispersed on the pore wall of the carbon structure. The prepared MoC-OMC has excellent activity for direct N2H4 decomposition. The strong interaction between Mo₇O₂₄^6– and the resin plays an important role in the synthesis of this material.