Preparation method for three-dimensional ordered foramen magnum titanium oxygen 'lithium ion screen'

Abstract

The invention discloses a preparation method of a three-dimensional-ordered macroporous (3 DOM) titanyl 'lithium ion sieve'. In the method, a polymethacrylic acid methyl ester colloid crystal template is synthesized; precursor solution of lithium salt and titanium salt is used to fill in the colloid crystal template; after sucking filtration, drying, two stage constant temperature calcination, acid pickling and re-drying, the 3 DOM titanyl 'lithium ion sieve' is obtained. The invention has the following beneficial effects that: 1, by the 3 DOM structure control of a material, the proportion of the activated adsorbed phase of the material of the ion sieve is improved obviously, thereby strengthening inner diffusibility in ion transferring, and being a double pore canal function material simultaneously having a macropore and a micropore; 2, the adsorption quantity of the lithium ion is high; the maximum adsorption quantity is over 40 mg/g and larger than the prior documentary adsorptive value, when the pH value of the solution is equal 8; 3, the structure of the titanyl 'lithium ion sieve' is stable; due to the absence of the trivalent titanium ion, an adsorption-desorption process is free of solution loss, thereby being better than a manganese oxide 'lithium ion sieve'; 4, a colloid crystal template method and a sol-gel method are combined, thereby being a novel method for preparing the material of the titanyl 'lithium ion sieve'.

Description

technical field [0001] The invention relates to a preparation method of an ion sieve adsorbent, in particular to a method for preparing a lithium ion sieve adsorption material by using a polymer colloidal crystal template. Background technique [0002] Since Imhof and Velev et al. successfully prepared three-dimensionally ordered macropore (3DOM) materials by microemulsion method and colloidal crystal template method respectively in 1997, this type of material has aroused extensive interest of researchers at home and abroad. It has broad application prospects in catalytic carriers, chromatographic carriers, cell fixation, filtration and separation materials, battery materials and thermal resistance materials. Three-dimensional ordered macropores are composed of a special ordered hornet's honeycomb-like three-dimensional network channel. The stability of the face-centered cubic structure is greater than that of the hexagonal close-packed structure. It has large pore size, uni...

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Problems solved by technology

Chinese invention patent CN 101157476A used one-dimensional nano-titanium dioxide as a titanium source to prepare a titanium dioxide ion sieve, but the adsorption capacity was not high; 4 Ti 5 o 12 Preparation of electrode films (Electrochimi.Acta, 2007, 53, 79-82); Sorensen et al. also prepared 3DOM Li with two colloidal crystal membrane plates 4 Ti 5 o 12 material and conducted a study on the effect of pore wall structure on electrochemical properties (Chem.Mater., 2006, 18, 482-489); Cao Yanling and others also used polystyrene colloidal crystal templates to prepare high-quality titanium dioxide pore anatase Mineral phase materials (Science Bulletin, 2006, 51, 1509-1512); in the three-dimensional ordered macroporous manganese oxide "lithium ion sieve" proposed by us, the dissolution loss of manganese due to the redox exchange of trivalent manganese is still inevitable (China Patent Application Publication No. CN 101062473A), and the work of making three-dimensional ordered macropores as a "lithium ion sieve" adsorption material has not been successful so far.

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