Resol-assisted synthetic large aperture ordered mesopore metallic oxide material and preparation method of material

Abstract

The invention belongs to the technical field of nano porous materials, in particular to a resol-assisted synthetic large aperture ordered mesopore metallic oxide material and a preparation method of the material. According to the material and the preparation method thereof, an amphiphilic block copolymer (PEO-b-PS and PEO-b-PMMA) with large molecular weight hydrophobic segments is taken as a template agent, the principle of assisted self-assembly of resol is utilized, and in a solvent evaporation process, the resol fixes a metal precursor to a hydrophilic end of the template agent, the self-assembly is induced through solvent evaporation, so as to enable the template agent and a mesoporous material precursor to react to form microphase separation, and obtain an ordered mesostructure; after using large molecular weight hydrophobic block to form a large hydrophobic area, and removing the template agent, the large aperture ordered mesopore metallic oxide material is obtained. The synthetic mesoporous material has a super large aperture, the shape of the pore channel of the material is spherical, the mesoporous of the material is orderly arranged, and the material has a bimodal mesoporous structure and a super high specific surface area; the method is simple, the raw material is easy to obtain and the material is suitable for enlarged production.

Description

Technical field [0001] The present invention is a technology field of nano -porous materials, which involves a large -pore -diameter -oriented medium metal oxide material and their preparation methods. Background technique [0002] In recent years, metal oxide materials and composite materials have been widely used in the aspects of optical electron transmission, optical guidance, sensing, photocatalytic dyeing solar cells, battery packs, and water purification.Essence(A.hagfeldt, j.tang, y.y.wu, e.w.mcfarland, g.d.stucky, chem.commun.2004,1670-1671; T.kawahara, y.konishi, h.tada, n.tohge, j.nishii, s.18,2579-2582; M.zukalova, A.ZUKAL, L.kavan, M.K.NAZEERUDDIN, P.Liska, M.Gratzel, Nanolett.2005, 5,1789-1792. As we all know, the nature of metal oxide materials and composite materialsTo a large extent, they depend on their surface properties and high ratio.) Especially the crystallization level of metal oxide materials has an important impact on its application. Because the orderly...

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(B.Z.Tian, ​​X.Y.Liu, B.Tu, C.Z.Yu, J.Fan, L.M.Wang, S.H.Xie, G.D.Stucky, D.Y.Zhao, Nat.Mater.2003, 2, 159-163; B.Z.Tian, ​​X.Y.Liu, B.Tu, C.Z.Yu, J.Fan, L.M.Wang, S.H.Xie, G.D.Stucky, D.Y.Zhao, Nat.Mater.2003, 2, 159-163; W.Dong, Y.Sun, C.W.Lee, W.Hua, X.Lu, Y. Shi, S. Zhang, J. Chen and D. Zhao, J. Am. Chem. Soc. 2007, 129, 13894-13904; T. Yu, Y. Deng, L. Wang, R. Liu, L. Zhang, B. TuandD.Zhao,Adv.Mater.2007,19,2301-2306.K.Niesz,P.D.Yang,G.A.Somorjai,Chem.Commun.2005,1986-1987.Q.Yuan,A.-X.Yin,C.Luo , L.-D.Sun, Y.-W.Zhang, W.-T.Duan, H.-C.Liu, C.-H.Yan, J.Am.Chem.Soc.2008, 130, 3465- 3472.) Due to the limitation of the chain length of the hydrophilic segment and the hydrophobic segment of the surfactant, the pore diameter and wall thickness of the synthesized mesoporous metal oxide material are generally not more than 8nm, and when the high temperature roasting removes the template agent or affects the resulting mesoporous During the high-temperature crystallization process of porous materials, the framework loses effective support due to the removal of the template agent, and the high-temperature calcination causes the material framework to shrink and reorganize, which will eventually lead to the collapse of the entire mesoporous framework.

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