Key Words:Bismuth compounds;Ball milling - Chlorine compounds - Niobium oxide - Photocatalysis - Photocatalytic activity - Rhodium compounds - Synthesis (chemical)

Abstract:Altering the semiconductor composition and suitable energy levels to form a cascade structure is a feasible approach to achieve superior photocatalytic activity. In this study, Bi<inf>4</inf>NbO<inf>8</inf>Cl was prepared by a ball milling-calcination method. And one-pot hydrothermal process was developed as a new strategy to synthesize ternary Bi<inf>4</inf>NbO<inf>8</inf>Cl/BiOCl/Nb<inf>2</inf>O<inf>5</inf> (BBN) composites, where ultrafine Nb<inf>2</inf>O<inf>5</inf> nanoparticles and BiOCl were in-situ grown and loaded on the surface of Bi<inf>4</inf>NbO<inf>8</inf>Cl using NbCl<inf>5</inf> as raw material. An enhanced photocatalytic performance towards RhB removal by Bi<inf>4</inf>NbO<inf>8</inf>Cl/BiOCl/Nb<inf>2</inf>O<inf>5</inf> is assigned to the in-situ formation of intimated interfaces contacts among Bi<inf>4</inf>NbO<inf>8</inf>Cl, BiOCl and Nb<inf>2</inf>O<inf>5</inf>, and suitable conduction band (CB) alignments in the ternary hybrid. The staggered energy levels inhibit the recombination of photoinduced electron-hole pairs and increases the separation efficiency of charge carriers, subsequently enhances the photocatalytic efficiency.<br/> © 2019 Elsevier B.V.

Volume:506

Issue:无

Translation or Not:no