| abstract |
The invention discloses a preparation method of a supported nano-gold photocatalyst. The steps are as follows: dissolving HAuCl4.4H2O in a solvent, adding organic mercaptan and sodium borohydride thereinto, stirring for 0.5-10 h, distilling off the solvent, and washing the product Then, extracting solution was added to obtain nano-gold solution; a carrier was added to the nano-gold solution so that the loading of Au was 0.01-5 wt%, stirred for 1-12 h, centrifuged, washed, and vacuum-dried to obtain a supported nano-gold photocatalyst. The invention prepares ultra-thin bismuth oxyhalide nanosheets (2-3 nm) by hydrothermal method, the thin bismuth oxyhalide layer will expose oxygen vacancies, and the reducibility of the oxygen vacancies of the ultra-thin bismuth oxyhalide nanosheets is used to reduce the oxidation of nano-gold Thus, the photocatalytic stability of nano-gold is improved, and the synergistic effect of nano-gold and bismuth oxyhalide can improve its catalytic activity. |