Bi0/Bi2O2CO3/N-TiO2复合材料的制备及其光催化性能

Bi0/Bi2O2CO3/N-TiO2 composite material: preparation and photocatalytic performance

摘要:

利用TiO2纳米带作为基底，乙二胺作为还原剂及氮源，采用溶剂热法合成光催化复合材料Bi0/Bi2O2CO3/N-TiO2。通过XRD、SEM、TEM等对催化剂的结构进行表征，结果显示，直径为1.2~2.1 nm的单质铋（Bi0）和碳酸氧铋（Bi2O2CO3）的复合量子点均匀生长在一维TiO2纳米带（TiO2 NBs）表面。在可见光照射下，相比于TiO2（降解率30.95％），Bi0/Bi2O2CO3/N-TiO2在3 h内实现了对有机污染物罗丹明B的高效降解（降解率95.02％）。最后进行活性物质捕获实验，证实h+和•OH是材料参与光催化降解罗丹明B的主要活性物质。

Abstract:

A solvothermal method using TiO2 nanobelts as a substrate, ethylenediamine as a reducing agent and a nitrogen source to synthesize the photocatalytic composite Bi0/Bi2O2CO3/N-TiO2 is proposed. The obtained material was characterized by XRD, SEM, TEM etc. In the architecture of the composite, compound quantum dots combined with Bi0 and Bi2O2CO3 (1.40~1.50 nm) uniformly grew on the surface of TiO2 nanobelts (NBs). Compared with TiO2 (30.95％), Bi0/Bi2O2CO3/N-TiO2 realized a more efficient degradation of Rhodamine B (95.02%) under visible light irradiation. Finally, the active species-trapping experiments was carried out to explore the main active species. In the photoreaction, h+ and •OH may be the main active species.