摘要
利用TiO_(2)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Bi^(0)/Bi_(2)O_(2)CO_(3)/N-TiO_(2)。通过XRD、SEM、TEM等对催化剂的结构进行了表征。结果显示,直径为1.2~2.1 nm的单质铋(Bi^(0))和碳酸氧铋(Bi_(2)O_(2)CO_(3))的复合量子点均匀生长在一维TiO_(2)纳米带(TiO_(2)NBs)表面。在可见光照射下,相比于TiO_(2)NBs(降解率30.95%),Bi^(0)/Bi_(2)O_(2)CO_(3)/N-TiO_(2)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%)。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。
Photocatalytic composite Bi^(0)/Bi_(2)O_(2)CO_(3)/N-TiO_(2) was prepared by solvothermal method using TiO_(2) nanobelts as substrate and ethylenediamine as reducing agent and nitrogen source.The obtained material was characterized by XRD,SEM,TEM and other techniques.The results showed that in the architecture of the composite,compound quantum dots combined with Bi^(0) and Bi_(2)O_(2)CO_(3) with a diameter of 1.2~2.1 nm uniformly grew on the surface of TiO_(2) nanobelts(TiO_(2) NBs).Bi^(0)/Bi_(2)O_(2)CO_(3)/N-TiO_(2) exhibited an efficient degradation of Rhodamine B of 95.02%under visible light irradiation,higher than that of Ti O2 NBs(30.95%).The active species-trapping experiments verified that h+and·OH were the main active species involved in the photocatalytic degradation of Rhodamine B.
作者
王延炜
李佳益
王博威
孙明明
陈立功
李阳
WANG Yanwei;LI Jiayi;WANG Bowei;SUN Mingming;CHEN Ligong;LI Yang(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China;Collaborative Innovation Center of Chemical Science and Engineering(Tianjin),Tianjin 300072,China;Tianjin Engineering Research Center of Functional Fine Chemicals,Tianjin 300350,China)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2021年第8期1628-1634,共7页
Fine Chemicals
基金
国家自然科学基金(21808161、21978208)
中国博士后科学基金(2020T130465)。
关键词
二氧化钛
纳米带
铋
碳酸氧铋
量子点
光催化技术
titanium dioxide
nanobelt
bismuth
bismuth oxycarbonate
quantum dots
photocatalytic technology
