含Sr2+和Bi3+有机杂化体的合成及其光降解罗丹明B

采用溶剂热法在N,N-二甲基甲酰胺溶液中合成了不同摩尔比例的SrCl_2和Bi(NO_3)_3(分别为5%,10%,30%,50%,80%)与对苯二甲酸形成的含Sr~(2+)和Bi~(3+)有机杂化体,并在紫外可见光照射下对其进行了罗丹明B降解活性的评价.结果表明:杂化体在紫外可见光下对RhB降解活性良好,其中SrCl_2摩尔比例10%掺杂的催化剂光降解活性最佳,这归结于其在紫外区域对光有很好的吸收及光生电子和空穴能有效地分离.双金属离子能协同调节有机杂化体的光催化活性.

Synthesis of Organic Hybrids Containing Sr2+ and Bi3+ for Photodegradation of Rhodamine B

Organic hybrids containing Sr²⁺ and Bi²⁺ were prepared by solvothermal method using terephthalic acid and different molar ratios of SrCl₂/Bi(NO₃)₃ (5%, 10%, 30%, 50% and 80%) in N,N-dimethylformamide solution. The degradation activities for RhB were evaluated under UV-visible light irradiation. The results indicated that these hybrids exhibited excellent UV-visible light degradation activities for RhB. The hybrid with a SrCl₂ molar ratio of 10% exhibited best degradation activity, which was ascribed to its efficient UV absorption and effective separation of photogenerated electrons and holes. It appears that such dual metal ion system can synergistically tune the photocatalytic activities of organic hybrids.