Study On The Preparation Of β-CD Intercalated LDHs And Its Application In Water Treatment Of Dyes

Layered double hydroxides (LDHs), also known as hydrotalcitelike-compounds (HTLcs) or anionic clays. LDHs aroused more and more attention for its unique structure and properties of layers. β-cyclodextrin((3-CD) intercalated ferrum-containing hydrotalcite was fleetly prepared by the technology of the microwave-crystallization and low saturated state of coprecipitation,β-CD grafted cellulose(β-CDGC) intercalated hydrotalcite was composited through the method of load. The purposed sample of LDHs and calcined-LDHs were characterized by XRD, IR, SEM and BET. The results show that the synthesized samples with the flexible slice have the structure of LDHs. The simples were then applied to the water treatment of dyes. Some research achievements are described in the dissertation.β-cyclodextrin ((3-CD) intercalated ferrum-containing hydrotalcite (P-CD-Fe-LDHs) were fleetly prepared by the technology of the microwave-crystallization and low saturated state of coprecipitation, then applied to the removal of malachite green (MG). The effects of photocatalyst types, the reaction temperature, pH, MG mass concentration and β-CD-Fe-LDHs mass concentration on the MG removal were investigated. It is shown the percentage of removal for MG solution of50mg/L can reach91.11%under the optimum conditions even after5cycles. The kinetics cuvres of removal show that the removal is first-order kinetics model under different β-CD-Fe-LDHs mass concentrations and MG mass concentrations. The results suggest that β-CD-Fe-LDHs can be used as a novel and efficient photocatalyst for the removal of MG.The calcined products calcined-β-CD-Fe-LDHs were then applied to the removal of parafuchsin. It is shown the percentage of removal for parafuchsin solution of50mg/L can reach95.70%under the optimum conditions, and the removal rate can reach79.99%even after5cycles. The kinetics cuvres of removal show that the removal is first-order kinetics model before40minutes under different photocatalyst mass concentrations and parafuchsin mass concentrations.β-CD grafted cellulose(β-CDGC) was synthesized through intermediates epoxy, then β-CDGC-Fe-LDHs was composited through the method of load. The calcined product calcined-β-CDGC-Fe-LDHs was applied to the removal of MG and parafuchsin solution at the optimum conditions. The removal was fine and the kinetics cuvres of removal showed that the removal is first-order kinetics model for In (C0/Ct) and t showed a good linear relationship within reaction time.