Catalyst for heavy metal sewage treatment and preparation method thereof

The invention discloses a catalyst for heavy metal sewage treatment and a preparation method thereof. The preparation method comprises the following steps: preparing a samarium and ytterbium co-dopedbismuth oxyiodide photocatalyst by adopting a solvothermal method, dispersing the samarium and ytterb...

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1. Verfasser: FENG JIASHENG
Format: Patent
Sprache:chi ; eng
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Zusammenfassung:The invention discloses a catalyst for heavy metal sewage treatment and a preparation method thereof. The preparation method comprises the following steps: preparing a samarium and ytterbium co-dopedbismuth oxyiodide photocatalyst by adopting a solvothermal method, dispersing the samarium and ytterbium co-doped bismuth oxyiodide photocatalyst into deionized water, adding a certain amount of silicic acid, preparing a samarium and ytterbium co-doped bismuth oxyiodide/bismuth silicate composite photocatalyst by adopting a hydrothermal method, and finally loading silver by a photoreduction methodto obtain the composite catalyst. The synergistic effect of samarium and ytterbium is utilized to promote the improvement of the performance of the photocatalyst, and the photocatalyst is compoundedwith bismuth silicate to form a heterojunction and loaded with silver to improve the reduction and purification capacity of the catalyst, so that the catalyst has more excellent capacity of treating hexavalent uranium ions (U6+