Cu-Bi纳米粉体催化剂的表征及其可见光光催化降解甲基橙的研究  

Photodegradation of Methyl Orange Under Visible Light over Cu-Bi Nano-Particle Catalyst

作　　者：颜桂炀[1] 郑柳萍[1] 翁秀兰[1] 蒋健[1] 

机构地区：[1]福建师范大学化学与材料学院,福建福州350007

出　　处：《石油化工》2006年第1期42-46,共5页Petrochemical Technology

基　　金：福建省教育厅资助项目(JB04237)

摘　　要：以Cu(NO3)2.3H2O,B i(NO3)3.5H2O,CO(NH2)2为原料、聚乙二醇为分散剂,采用均匀共沉淀法制备了Cu-B i纳米粉体催化剂,用X射线粉末衍射、傅里叶变换红外光谱、透射电镜、能量色散法、示差扫描-热重分析和紫外-可见漫反射光谱法对Cu-B i纳米粉体催化剂的组成、粒径大小、表面形貌和光学吸收性能进行了表征,并以甲基橙为目标降解物,考察了所制备的Cu-B i纳米粉体催化剂在可见光下的光催化性能。实验结果表明,Cu-B i为类球形纳米粉体,粒度均匀,粒径约为50nm;在可见光下Cu-B i纳米粉体催化剂对甲基橙具有良好的光催化降解性能,辐照时间4h,甲基橙的脱色率可达80%以上。Cu -Bi nano -particles were prepared by an improved homogeneous coprecipitation with Cu （ NO3 ）2· 3H2O, Bi （ NO3 ） 3 · 5H2O and CO （ NH2 ） 2 being used as raw materials and polyethylene glycol（PEG） as dispersant. Structure and physicochemical properties of Cu -Bi nano -particles were characterized by means of X - ray diffraction （ XRD ）, Fourier transform infra - red （ FTIR ） spectrometry, transmission electron microscopy （ TEM ）, energy dispersive spectroscopy （ EDS ）, differential scanning calorimetry - thermogravimetry （ DSC - TG） and ultraviolet - visible - diffuse reflection spectroscopy （ UV - Vis - DRS）. Photocatalytic activity of Cu - Bi nano - particle catalyst for degradation of methylene orange under visible light was investigated. Size of Cu - Bi nano - particles was within 50 nm. Cu - Bi nano - particle catalyst exhibited good photocatalytic degradation activity and decolourizing rate of methyl orange over the photocatalyst. More than 80% of methyl orange was degraded after 4 h irradiation.

关 键 词：纳米粉体 铜-铋 均匀共沉淀法 甲基橙 可见光 光催化 降解 

分 类 号：TQ116.2[化学工程—无机化工]