Enhanced visible light photocatalytic efficiency of La-doped ZnO nanofibers via electrospinning-calcination technology
Enhanced visible light photocatalytic efficiency of La-doped ZnO nanofibers via electrospinning-calcination technology
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通过静电纺丝-煅烧技术提高La掺杂ZnO纳米纤维的可见光光催化效率
DOI：
10.1016/j.apmate.2021.09.004
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发表时间：
2022-04-01
期刊：
影响因子：
--
通讯作者：
Jiang, Shaohua
中科院分区：
文献类型：
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作者：
Jian, Shaoju;Tian, Zhiwei;Jiang, Shaohua
采用静电纺丝-煅烧技术制备了一系列La掺杂ZnO（La/ZnO）纳米纤维，并通过扫描电镜（SEM）、透射电镜（TEM）、X射线衍射（XRD）、紫外-可见（UV-Vis）吸收光谱和比表面积分析等手段对其进行了表征。以B为催化剂，在可见光照射下进行光催化降解实验，考察了焙烧温度、La掺杂量、La掺杂ZnO浓度和RhB B浓度等工艺参数对复合材料光催化效率的影响。在最佳条件下，掺杂1.5at.%的ZnO可见光照射510 min后，La对Rh B的降解率达到94.31%。La/ZnO催化剂光降解Rh B的动力学数据符合Langmuir-Hinshelwood一级动力学模型。
A series of La-doped ZnO (La/ZnO) nanofibers were prepared by electrospinning-calcination technology and characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), ultraviolet-visible (UV-Vis) absorption spectroscopy and specific surface area analysis. The effect of numerous operational parameters involving calcination temperature, La doping amount, La-doped ZnO concentration and initial Rhodamine B (Rh B) concentration on photocatalytic efficiency of the composite has been analyzed by using Rh B for degradation under the illumination of visible light. Under optimum conditions, ZnO doped with 1.5 at.% La achieved 94.31% Rh B degradation after 510 min of visible light illumination. The kinetic data of La/ZnO catalyst for Rh B photodegradation fitted the Langmuir-Hinshelwood first-order (LHFO) kinetic model well.