Synthesis of monoclinic structured BiVO4 spindly microtubes in deep eutectic solvent and their application for dye degradation.
Monoclinic structured spindly bismuth vanadate microtubes were fabricated on a large scale by a simple ionothermal treatment in the environment-friendly green solvent of urea/choline chloride. The as-prepared samples were characterized by XRD, SEM, TEM, IR and their photocatalytic activity was evaluated by photocatalytic decolorization of rhodamine B aqueous solution under visible-light irradiation. As-obtained BiVO(4) microtubes exhibit the spindly shape with a side length of ca. 800 nm and a wall thickness of ca. 100 nm. The opening of these microtubes presents a saw-toothed structure, which is seldom in other tube-shaped materials. The formation mechanism of the spindly microtubes is ascribed to the complex cooperation of the reaction-crystallization process controlled by BiOCl and the nucleation-growth process of nanosheets induced by solvent molecules attached on the surface of microtubes. Such spindly microtubes exhibit much higher visible-light photocatalytic activity than that of bulk BiVO(4) prepared by solid-state reaction, possibly resulting from their large surface area and improved crystallinity.
Liu
Wei
W
Institute of Materials Science and Engineering, Ocean University of China, Qingdao, PR China. weiliu@ouc.edu.cn
Yu
Yaqin
Y
Cao
Lixin
L
Su
Ge
G
Liu
Xiaoyun
X
Zhang
Lan
L
Wang
Yonggang
Y
D001729:Bismuth / Q000737:chemistry; D002384:Catalysis; D002623:Chemistry Techniques, Analytical; D004396:Coloring Agents / Q000737:chemistry*; D052918:Environmental Restoration and Remediation / Q000379:methods*; D015394:Molecular Structure; D053758:Nanoparticles; D010782:Photolysis; D012997:Solvents; D014638:Vanadates / Q000138:chemical synthesis* / Q000737:chemistry
D004396:Coloring Agents; D012997:Solvents; C091754:bismuth vanadium tetraoxide; D014638:Vanadates; D001729:Bismuth