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The mesoporous nanotubes of iron phosphate are synthesized by surfactant templating and solvothermal methods. When the concentration of the surfactant (SDS) is set at the transition region between its lamellar and hexagonal mesophases, the coassemblies of iron phosphate and SDS form a flake-type mesoporous iron phosphate. The following solvothermal treatment produces mesoporous nanotubes of FePO4 with diameters of 50-400 nm and lengths of several microns. The removal of surfactant by ion exchange and heat treatment produces the clean nanotubular and mesoporous iron phosphate, which possesses a specific surface area of 232 m2/g and a bimodal distribution of pore sizes, corresponding to the mesopores of the walls and the nanotube diameters, respectively. The novel tubular material with composite meso-macroporous structure, benefiting the diffusion of reactive molecules, has shown better catalytic performance for direct hydroxylation of benzene with hydrogen peroxide compared with conventional mesoporous iron phosphate. 发自小木虫Android客户端 |
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jiangguofeng
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北街如梦: 金币+5, ★★★★★最佳答案 2016-10-14 07:46:56
北街如梦: 金币+5, ★★★★★最佳答案 2016-10-14 07:46:56
| 通过表面活化剂制模法和溶剂热法合成磷酸铁的介孔纳米管。 当表面活性剂(SDS)浓度设定在其层状和六角形中间相之间的渐变区时,磷酸铁和SDS的共组件就形成一种片状介孔磷酸铁。 下述通过溶剂热法加工制造出50-400纳米直径和几微米长度的FePO4介孔纳米管。 通过离子交换和热处理除去表面活性剂来生产清洁纳米管和介孔磷酸铁,其具有232 m2/g的比表面积和分别与壁和管径相当的介孔孔径的双峰分布。这种具有复合介孔-大孔结构的新型管状材料有利于反应分子扩散，与传统的介孔磷酸铁相比，在用于过氧化氢对苯直接进行羟基化反应中已经显示出更好的催化性能。 |
2楼2016-10-13 10:14:45