The Preparation and Characterization of Aluminate Hydrate Nanoparticles

Graphical AHNPs are prepared with complexing agent and deposition agent by aqueous solution deposition.The AHNPS's structures are confirmed through FTIR, XRD, and SEM.The reaction temperature have an effect on the size and phase of AHNPs and the degree of the aggregation.A formation mechanism of the AHNPs is represented. In this work, aluminate hydrate nanoparticles were successfully prepared with complexing agent (ethylenediamine) and deposition agent (hydrazinehydrate) by aqueous solution deposition.The aluminate hydrate nanoparticles were analyzed by FTIR, XRD, and SEM. The reaction temperature have an effect on the size and phase of aluminate hydrate nanoparticles, and the degree of the aggregation.When the temperature was at below 80°C, aluminate hydrate nanoparticles were mainly composed of Al(OH) 3 nanoparticles with nordstrandite phase;when the temperature was over 80°C, aluminate hydrate nanoparticles were mainly AlOOH nanoparticles with boehmite phase.The sizes of Al(OH) 3 nanoparticles were in the range of 50–200 nm with a good quality of dispersion, and the size of AlOOH nanoparticles were in the range of 300–800 nm with part of agglomeration and little dispersion.A formation mechanism of the AlOOH and Al(OH) 3 NPs was represented.