Facile Synthesis Of Several Bismuth, Tin Compounds And Their Applications In Photoelectrochemistry And Dye Removal

In recent years, Bi and Sn compounds have attracted great attention due to their excellent performances in photocatalysis, photoelectrochemistry, etc. In this paper, several Bi and Sn compounds have been synthesized by mild hydrolysis and then applied to photoelectrochemistry, adsorptive removal and photocatalytic degradation of dyes. The main research contents are as follows:(1) [Bi6O5(OH)3](NO3)5·3H2O/Bi2S3 heterostructured colloidal nanoparticles have been synthesized by a hydrolysis-sulfuration method. Then, the colloid was modified onto FTO conductive glass to form corresponding semiconductor films. The influences of the amount of Na2 S added, the layer number modified and the heat treatment temperature on the photoelectrochemical performance was investigated and the corresponding mechanism was also discussed.(2) A new adsorbent of an octahedron-structured basic bismuth(III) nitrate was synthesized via a mild hydrolysis route at room temperature. The adsorption process was studied using MO as the model molecule by optimizing experimental variables include the influence of p H, dosage, contact time, temperature, and initial MO concentration. The adsorption equilibrium isotherms, kinetics and thermodynamics were analyzed, and the adsorption mechanism was also proposed.(3) Tin dioxide nanophotocatalyst was synthesized via a hydrolysis route followed by heat treatment. The catalytic process was studied using MO as the model molecule by optimizing experimental variables including the treatment temperature and initial MO concentration. The kinetics was analyzed and the adsorption mechanism was also discussed.