摘要
三氧化二铋(Bi_(2)O_(3))作为一种优异的功能材料,由于拥有特殊的性质而被应用于各领域中.以Ti^(4+)为掺杂离子,采用微乳法制备纯的Bi_(2)O_(3)和Ti-Bi_(2)O_(3)光催化剂;采用X射线衍射仪、傅里叶红外光谱仪、荧光光谱仪和紫外可见光分光光度计对所制备的光催化剂进行表征分析.实验结果表明,微乳法制备的Bi_(2)O_(3)催化剂以四方晶型为主,Ti-Bi_(2)O_(3)的峰型较纯的Bi_(2)O_(3)有所变宽,且微粒粒径均小于纯的Bi_(2)O_(3);Ti-Bi_(2)O_(3)的紫外可见吸收光谱相对于纯的Bi_(2)O_(3)发生了部分蓝移,但在紫外区的吸光强度高于纯Bi_(2)O_(3);Ti-Bi_(2)O_(3)在500℃煅烧下的荧光强度最低,且随着掺杂量的增加荧光强度降低.在紫外光照射下的甲基橙和罗丹明B光催化降解实验表明,当煅烧温度为500℃,Ti^(4+)掺杂量为2.5%时,Bi_(2)O_(3)对罗丹明B的降解率高于甲基橙,达81.1%.
As an excellent functional material,bismuth trioxide(Bi_(2)O_(3))has been applied in various fields due to its special properties.Ti^(4+)used as doping ion,Bi_(2)O_(3)and Ti-Bi_(2)O_(3)were prepared by microemulsion method.The photocatalyst was characterized by X-ray diffractometer,Fourier infrared spectrometer,fluorescence spectrometer and UV-visible spectrophotometer.The results showed that Bi_(2)O_(3)catalyst prepared by microemulsion method is mainly tetracyclic,the peak type of Ti-Bi_(2)O_(3)is wider than that of pure Bi_(2)O_(3),and the particle size is smaller than that of pure Bi_(2)O_(3).Compared with pure Bi_(2)O_(3),ultraviolet visible absorption spectrum of Ti-Bi_(2)O_(3)has a partial blue shift,but absorption intensity in the ultraviolet region is higher than that of pure Bi_(2)O_(3).Ti-Bi_(2)O_(3)has the lowest fluorescence intensity when calcined at 500℃,and the fluorescence intensity decreases with the increase of doping amount.The photocatalytic degradation experiments of methyl orange and rhodamine B under ultraviolet light showed that when the calcination temperature is 500℃and Ti^(4+)doping amount is 2.5%,the degradation rate of Rhodamine B by Bi_(2)O_(3)is higher than that of methyl orange,UP TO 81.1%.
作者
刁显珍
肖瑞
DIAO Xian-zhen;XIAO Rui(Chemnistry and Chemical Engineering College,Chongqing Institude of Science and Technology,Chongqing 401331,China)
出处
《应用化工》
CAS
CSCD
北大核心
2020年第S01期359-363,共5页
Applied Chemical Industry
