Designing 3D porous BiOI/Ti3C2 nanocomposite as a superior coating photocatalyst for photodegradation RhB and photoreduction Cr (VI)

Abstract

3D porous BiOI/Ti 3 C 2 photocatalyst utilized BiOI coating and the conductivity of Ti 3 C 2 MXene to promote the fast electron transferring, which was applied for photodegradation Rhodamine B (RhB) and photoreduction Cr (VI). • A highly efficient porous BiOI coating was fabricated on Ti 3 C 2 MXene interface by one-pot solvothermal method. • The BiOI/Ti 3 C 2 nanocomposite achieved a mesoporous nanostructure coating with a pore distribution of 2.5–20 nm. • The BiOI/Ti 3 C 2 nanocomposite provided the fast electron transferring along Ti 3 C 2 MXene interface. Based on controllable morphology of BiOI, three-dimension (3D) porous BiOI/Ti 3 C 2 nanocomposite can be prepared via one-pot method in solvothermal condition. The BiOI/Ti 3 C 2 nanocomposite achieved a mesoporous nanostructure coating with a pore distribution of 2.5–20 nm. The numerous mesoporous of BiOI/Ti 3 C 2 nanocomposite provided the abundant active sites as a coating photocatalyst. The photoelectric and photocatalytic performances of BiOI/Ti 3 C 2 nanocomposite have also been discussed and studied systematically. In solvothermal condition, the synthesized BiOI as coating was dispersed on the Ti 3 C 2 MXene surface to form the porous nanostructure, which achieved a larger specific surface area. Furthermore, the BiOI/Ti 3 C 2 nanocomposite respectively displayed the stronger photocatalytic ability in photodegradation Rhodamine B (RhB) and photoreduction Cr (VI) than 2D BiOI. For 3D porous BiOI/Ti 3 C 2 nanocomposite, the BiOI/Ti 3 C 2 nanocomposite with 40 wt% Ti 3 C 2 MXene displayed the optimum photocatalytic ability. And the superior photocatalytic ability of BiOI/Ti 3 C 2 nanocomposite was mainly due to the uniform mesoporous coating, high conductivity and narrow band gap. Therefore, Ti 3 C 2 MXene as BiOI co-catalyst had a good prospect for application in water remediation.