Preparation of porous alumina template and study on formation process;

The fabrication and transmissivity of porous alumina templates;

The fabrication of high-quality periodic porous alumina templates;

Surface areas exceeding 350m~2/g,pore sizes ranging from 2 to 50nm and with a narrow pore size distribution are characteristics of mesoporous alumina(MA).

Three kinds of mesoporous alumina supports denoted as meso-Al_2O_3-x (x=a, b, c) with different surface basicity were synthesized using P123, cetyltrimethylammonium bromide and chitosan as the templates, respectively.

By modifying and optimizing the procedures, which were well-described and understood for the synthesis of mesoporous silica, mesoporous alumina based molecular sieve has been successfully prepared.

Well ordered porous anodic alumina (PAA) film was prepared on pure Al substrate using sulfuric/oxalic acid mixture as electrolyte with different ratios, the best regular PAA film with an average diameter of 45 nm was obtained using 1∶1 sulfuric/oxalic (molar concentration) mixed acid at 26 V.

TiO_2 nanotubes were prepared by sol-gel method using porous anodic alumina as the template,and then,doped by nitrogen in ammonia gas atmosphere.

The physical structure of the porous anodic alumina was characterized by using SEM and BET.

An investigation is made on the optical transmittance,optical absorption and photoluminescence of nanohole alumine templates.