Mesoporous Nanotubes of Iron Phosphate: Synthesis, Characterization, and Catalytic Property

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• 作者：Dinghua Yu ; Jieshu Qian ; Nianhua Xue ; Danyu Zhang ; Chunyan Wang ; Xuefeng Guo ; Weiping Ding ; Yi Chen
• 刊名：Langmuir
• 出版年：2007
• 出版时间：January 16, 2007
• 年：2007
• 卷：23
• 期：2
• 页码：382 - 386
• 全文大小：369K
• 年卷期：v.23,no.2(January 16, 2007)
• ISSN：1520-5827

文摘

Iron phosphate nanotubes with mesoporous walls are solvothermally synthesized using sodium dodecyl sulfate(SDS) as a template. With different template concentrations, various shapes of nanosized iron phosphates can beobtained. When the concentration of SDS is set at the transition regions between the lamellar and the hexagonalmesophases, according to its phase diagram, the coassembly of iron phosphate precursor and SDS forms a flake-typemesoporous iron phosphate. Otherwise, nanoparticles or bulky sheets of iron phosphates are obtained. The followedsolvothermal treatments on the mesoporous iron phosphate flakes produce iron phosphate nanotubes with mesoporouswalls. The removal of the surfactant by acetate exchange and heat treatment results in the clean mesoporous nanotubesof iron phosphate with diameters of 50-400 nm and lengths of several microns. The nanotubular and mesoporousiron phosphate possesses a specific surface area of 232 m²/g and a bimodal distribution of pore sizes, correspondingto the size of mesopores in the walls and the diameter of the nanotubes, respectively. The novel nanotubular ironphosphate with composite meso-macroporous structure, in favor of the diffusion of reactive molecules, has beentested for direct hydroxylation of benzene with hydrogen peroxide and has shown better catalytic performance comparedwith the conventional particulate mesoporous iron phosphate.