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Preparation of Layered Double Hydroxides Functional Properties and the Study of Its Selective Adsorption

Author: HeDanDan
Tutor: JinLan
School: Beijing University of Chemical Technology
Course: Chemical Engineering and Technology
Keywords: Hydrotalcite Carboxymethyl -β-cyclodextrin Gold Nanocrystals Hemoglobin Selective adsorption
CLC: TB34
Type: Master's thesis
Year: 2011
Downloads: 138
Quote: 0
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Abstract


This article powders prepared cyclodextrin intercalated hydrotalcite (CMCD-LDH) by ion exchange and structural characterization of intercalation assembly ; choose phenol and nitrobenzene guest molecules to study in detail the choice of the guest molecules intercalated product The adsorption properties . The study found that under the same conditions , the powder material is preferentially adsorbed phenol, this is due to the phenol with the cyclodextrin cavity size is more match , the cyclodextrin hydroxy easily form hydrogen bonds with phenol hydroxyl groups . Explore the potential applications of of such intercalation materials in the selective separation of organic pollutants in the field . Preparation of hydrotalcite load the gold crystal powder , used to restore the in-depth study of the material on the performance of the selective adsorption of lysozyme , hemoglobin and bovine serum albumin three small biomolecules . The study found that the ability of the hydrotalcite load gold crystal material has good adsorption of biological molecules . Under the same experimental conditions , the material is preferentially adsorbed hemoglobin. Causes of selectively adsorbed mainly due to the size of the hemoglobin molecule and hydrotalcite pore match , while the load on the protein with the hydrotalcite gold crystal can form more mercapto bond , caused by the synergy between the two . The best kinetics and adsorption isotherm model study on the adsorption process , draw the correlation coefficient . In order to solve the shortcomings of the powder material is not easy to recycle , easy to loss , we prepared in situ growth techniques hydrotalcite film and reduction method to load the film on the gold crystal , and thus the system to study the film of lysozyme , hemoglobin and bovine serum albumin selective adsorption performance . The study found that the ability of the film material having a good adsorption of small biological molecules . Under the same experimental conditions , the same film material preferentially adsorb hemoglobin. The selective adsorption main biological molecules with gold crystal to form a the sulfhydryl key , as well as the size of the host-guest matching synergy . And the best kinetic model to study the adsorption process , draw the correlation coefficient .

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