Preparation Of Ag/AgBr And Its Composites And Investigation Of Their Light Photocatalytic Activity

With the rapid development of economy and the growth of population, the problems of energy shortage, environmental degradation and other related issues have aroused people's concern. Photocatalytic degradation technology is one of new photochemical technology, have the advantage of clean, safety, efficient, no pollution and stable treatment. The development of high activity and high stability of the photocatalyst is the focus of our study. For the above problems, Colloidal spheres of Ag/AgBr has been synthesized. And improve the catalytic activity and stability through the composite, than a series of composites of Ag/AgBr/g-C3N4 and Ag/AgBr/BiOCl have been synthesized. the morphology, structure and optical properties of the composite were characterized by XRD, SEM, UV-vis and photoluminescence(PL) spectra. The main research content is as follows:(1)Alcohol thermal method was used to synthesis the composites of Ag/AgBr.SEM results showed the Ag/AgBr materials is a colloidal sphere with good dispersion property and uniform size; UV-vis results showed the light absorption ability of Ag/AgBr is better than that of AgBr; Degradation of MO results showed that the photocatalytic activity of Ag/AgBr is better than that of AgBr; Active species trapping results showed that ·OH and ·O2-play a main role in the process of MO degradation.(2)Solid state reaction was used to synthesis g-C3N4, Alcohol thermal method was used to synthesis the composites of Ag/AgBr/g-C3N4. SEM results showed the g-C3N4 materials is nano patchy, Ag/AgBr colloidal spheres are uniformly dispersed in g-C3N4 nanoparticles; XRD results showed that Ag/AgBr colloidal spheres grown on g-C3N4(002) crystal surface. UV-vis results showed the light absorption ability of Ag/AgBr/g-C3N4 is better than that of g-C3N4 and Ag/AgBr; Degradation of MO results showed that the photocatalytic activity of Ag/AgBr/g-C3N4 is better than that of AgBr and g-C3N4; Active species trapping results showed that ·O2- play a main role in the process of MO degradation.(3)Hydrothermal method was used to synthesis BiOCl, Alcohol thermal method was used to synthesis the composites of Ag/AgBr/BiOCl. SEM results showed the BiOCl materials prepared by the experiment is nano patchy, Ag/AgBr colloidal spheres are uniformly dispersed in BiOCl nanoparticles; XRD results showed that Ag/AgBr colloidal spheres grown on BiOCl(001) crystal surface. UV-vis results showed the light absorption ability of Ag/AgBr/BiOCl is better than that of BiOCl and Ag/AgBr; Degradation of MO showed that the photocatalytic activity ofAg/AgBr/BiOCl is better than that of AgBr and BiOCl; Active species trapping results showed that ·O2- play a main role in the process of MO degradation.