A kind of mcm-41 ordered mesoporous material and preparation method thereof

Abstract

The invention provides an MCM-41 ordered mesoporous material and a preparation method thereof. The preparation method comprises using iron tailings as a raw material, leaching with an inorganic strong acid solution, performing solid-liquid separation, washing and drying after heating and stirring to obtain acid-insoluble slag; mix acid-insoluble slag and alkali metal hydroxide in a mass ratio of 1:1.4-2.4, add deionized water, carry out hydrothermal reaction, and then separate solid-liquid to obtain silicon source; combine silicon source with surfactant , deionized water and ethanol are mixed, the pH value of the mixed solution is adjusted, the gel reaction is carried out by stirring at room temperature, and then washed, dried and ground to obtain the precursor; the precursor is calcined at 540 ~ 850 ° C for 5 ~ 9h, the MCM-41 ordered mesoporous material was obtained. The method has the advantages of simple operation, high silicon source extraction rate, and improved comprehensive utilization rate of iron tailings; the obtained mesoporous material has regular and orderly pore structure, adjustable pore size and high specific surface area.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to an MCM-41 ordered mesoporous material and a preparation method thereof. Background technique [0002] Ordered mesoporous material is a new type of nanostructured material that emerged rapidly in the 1990s. It has been highly valued by the international physics, chemistry and materials academic circles since its birth, and has rapidly developed into one of the interdisciplinary research hotspots. The synthesis of mesoporous materials began as early as 1971, but it was not until 1992 that Mobil reported the synthesis of M41S series of mesoporous materials. MCM-41 mesoporous material is a kind of M41S series, the pores are arranged in hexagonal order, the size is uniform, the pore size can be continuously adjusted in the range of 2-10nm, the specific surface area is large, and it has excellent ion exchange, catalysis and adsorption performance. It has a wide range of u...

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Problems solved by technology

Up to now, there have been research reports on the preparation of MCM-41 ordered mesoporous materials using iron tailings as raw materials by traditional low-temperature hydrothermal process, such as the MCM-41 mesoporous materials prepared by researchers from Northeastern University using iron tailings. The specific surface area is about 527m 2 / g(Honghao Yu, Xiangxin Xue, Dawei Huang.Synthesis of mesoporous silica materials(MCM-41) from iron oretailings.Materials Research Bulletin.44(2009),2112–2115.); MCM-41 mesoporous material was prepared as the raw material, the silicon source extraction rate was about 65% during the preparation process, and the specific surface area of ​​the prepared MCM-41 was only 882m 2 / g(Guang Yang, Yanxi Deng, Hao Ding, Zhixiang Lin, YuankaiShao, Yan Wang. A facile approach to synthesize MCM-41 mesoporous materials from mironore tailing: Influence of the synthesis conditions on structural properties. Applied Clay Science. 111(2015). 61 ; There are two main problems in the research on the preparation of mesoporous materials by obtaining silicon sources from iron tailings. The specific surface area of ​​porous materials is low, which seriously restricts the development and application of mesoporous materials prepared from iron tailings

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