摘要
以明胶为反应介质,采用凝胶网格沉淀法制备纳米TiO2光催化剂,利用TG-DTA、XRD、TEM、FT-IR、UV-Vis、FL等分析测试手段对制备过程、样品的结构和性能进行了研究.结果表明,利用凝胶网格沉淀法不仅能够控制纳米微粒的晶相和大小,而且可防止沉淀物相互聚集和团聚,获得的纳米微粒粒径更小,分散性更好.以染料罗丹明B溶液为目标降解物,1h的降解率为98%.最佳光催化剂的合成条件为8%明胶浓度、650℃煅烧2h.
Using gelatin as a reaction medium, nanocrystalline TiO2 photocatalytic was prepared adopting gel-network precipitation method. The preparation process, the structure and the property of samples were studied utilizing TG-DTA, XRD, TEM, FT-IR, UV-Vis and FL. Adopting gel-network precipitation method could not only control the crystalline phases and sizes of nanoparticles; but also could prevent the aggregation and agglomeration of precipitant. The size of the obtained nanoparticle was more small and dispersiveneas was more good. Using dye rhodamine B solution as objective matter, the lh degradation rate was 98%; and the best combine condition of photocatalyst was 8% gelatin concentration and 650℃, 2h calcine.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2006年第6期713-717,共5页
China Environmental Science
基金
河南省创新人才工程资助项目(教高[2001]513号)
关键词
纳米TIO2
凝胶网格沉淀法
光催化活性
罗丹明B
nanocrystalline TiO2
gel-network precipitation method
photocatalytic activity
rhodamine B
