Hydrothermal synthesis of novel flower-like BiVO 4 /Bi 2 Ti 2 O 7 with superior photocatalytic activity toward tetracycline removal
作者:Li Jinhai、Mengshu Han、Yang Guo、Fei Wang、Lingjun Meng、Danjun Mao、Shanshan Ding、Cheng Sun
DOI:10.1016/j.apcata.2016.06.025
日期:2016.8
A novel flower-like BiVO4 and BiVO4/Bi2Ti2O7 heterojunction photocatalyst was firstly synthesized by surfactant-free hydrothermal route, which is very convenient, rapid, controllable and environmentally friendly. The crystal structures, chemical composition, morphology, optical and photo-catalytic property of the as-prepared samples were characterized by the techniques of XRD, XPS, SEM, HRTEM, BET
首先通过无表面活性剂水热法合成了一种新颖的花状BiVO 4和BiVO 4 / Bi 2 Ti 2 O 7异质结光催化剂,该方法非常方便,快速,可控且环保。通过XRD,XPS,SEM,HRTEM,BET,UV-vis DRS和PL技术表征了所制备样品的晶体结构,化学组成,形态,光学和光催化性能。BiVO 4 / Bi 2 Ti 2 O 7异质结光催化剂比纯BiVO 4和Bi 2 Ti 2表现出更高的光催化活性。O 7用于在氙灯照射下降解四环素(TC)。BiVO 4 / Bi 2 Ti 2 O 7复合材料的增强的光催化活性与复合材料中BiVO 4和Bi 2 Ti 2 O 7的特定结构特征或质量比有关。BiVO 4 / Bi 2 Ti 2 O 7的可能光催化机理通过基于自由基捕获实验检测反应物种来推测复合材料。在使用LC-TOF / MS鉴定出的中间体的基础上,提出了四环素的初步去除途径。