ZnFe_(2)O_(4)/TiO_(2)纳米棒光催化剂的制备及其对甲基橙废水的脱色研究  

Preparation of ZnFe_(2)O_(4)/TiO_(2) Nanorods Photocatalyst and Its Decolorization Effect on Methyl Orange Wastewater

作　　者：王宇航 WANG Yuhang(Department of Chemistry and Chemical Engineering,Shaanxi Xueqian Normal University,Xi′an 710100,China)

机构地区：[1]陕西学前师范学院化学化工学院,陕西西安710100

出　　处：《化学与生物工程》2023年第10期25-29,共5页Chemistry & Bioengineering

基　　金：陕西省自然科学基础研究计划(2020JQ-915);陕西省大学生创新创业项目(S202314390081)。

摘　　要：采用水热法制备了ZnFe_(2)O_(4)纳米粒子,在碱性条件下水解钛酸丁酯组装得到ZnFe_(2)O_(4)/TiO_(2)纳米棒光催化剂,利用X-射线衍射仪(XRD)、扫描电镜(SEM)、振动样品磁强计(VSM)、N_(2)吸附-脱附仪及电化学工作站分别表征了ZnFe_(2)O_(4)/TiO_(2)纳米棒的晶型、形貌、磁性能、孔结构及电极性能,并研究了其对甲基橙废水的脱色效果。结果表明,ZnFe_(2)O_(4)具有尖晶石结构,而TiO_(2)是锐钛矿结构,二者组装为具有介孔结构的ZnFe_(2)O_(4)/TiO_(2)纳米棒光催化剂,比饱和磁化强度高达40.0 emu•g^(-1);紫外光照射120 min后,ZnFe_(2)O_(4)/TiO_(2)纳米棒对甲基橙废水的脱色率高达99%;且重复使用10次后,脱色率依然保持在85%以上。We firstly prepared ZnFe_(2)O_(4) nanoparticles by a hydrothermal method,and then obtained ZnFe_(2)O_(4)/TiO_(2) nanorods through hydrolysis of tetrabutyl titanate under alkaline conditions.Moreover,we characterized the crystal shape,morphology,magnetic property,pore structure,and electrode property of ZnFe_(2)O_(4)/TiO_(2) nanorods by using X-ray diffraction(XRD),scanning electron microscopy(SEM),vibrating sample magnetometer(VSM),N_(2) adsorption-desorption instrument,and electrochemical workstation.Furthermore,we studied the decolorization effect of ZnFe_(2)O_(4)/TiO_(2) nanorods to Methyl Orange wastewater.The results show that ZnFe_(2)O_(4) has a spinel structure,while TiO_(2) has an anatosite structure,and they are assembled into a mesoporous ZnFe_(2)O_(4)/TiO_(2) nanorods photocatalyst with a specific saturation magnetization of 40.0 emu•g^(-1).After 120 min ultraviolet irradiation,the decolorization rate of Methyl Orange wastewater by ZnFe_(2)O_(4)/TiO_(2) nanorods is as high as 99%.After ZnFe_(2)O_(4)/TiO_(2) nanorods are reused for 10 times,the decolorization rate remains above 85%.

关 键 词：ZnFe_(2)O_(4)/TiO_(2)纳米棒 光催化剂 染料降解 

分 类 号：O643[理学—物理化学]