Facile hydrothermal synthesis of TiO₂–Bi₂WO₆hollow superstructures with excellent photocatalysis and recycle properties

Abstract

One-dimensional mesoporous TiO2-Bi2WO6 hollow superstructures are prepared using a hydrothermal method and their photocatalysis and recycle properties are investigated. Experimental results indicate that anatase TiO2 nanoparticles are coupled with hierarchical Bi2WO6 hollow tubes on their surfaces. The TiO2-Bi2WO6 structure has a mesoporous wall and the pores in the wall are on average 21 nm. The hierarchical TiO2-Bi2WO6 heterostructures exhibit the highest photocatalytic activity in comparison with P25, pure Bi2WO6 hollow tube and mechanical mixture of Bi2WO6 tube and TiO2 nanoparticle in the degradation of rhodamine B (RhB) under simulated sunlight irradiation. The as-prepared TiO2-Bi2WO6 heterostructures can be easily recycled through sedimentation and they retains their high photocatalytic activity during the cycling use in the simulated sunlight-driving photodegradation process of RhB. The prepared mesoporous TiO2-Bi2WO6 with hollow superstructure is therefore a promising candidate material for water decontamination use.

Fabrication and efficient visible light-induced photocatalytic activity of Bi2MoO6/BiPO4 composite

“…In recent years, bismuth-based photocatalysts have been documented to exhibit superior photocatalytic activities than traditional TiO 2 in both UV and visible light regions [11][12][13]. Since 2010, the novel BiPO 4 has been paid much attention [14,15].…”

Facile fabrication of In2O3/Bi2WO6 heterostructured microbelts with enhanced photocatalytic activity

“…The Bi 2 WO 6 -based heterostructures with different morphologies were usually synthesized by hydrothermal method, for example, Fe 2 O 3 /Bi 2 WO 6 microspheres [7], Bi 2 O 3 /Bi 2 WO 6 rods [22], TiO 2 /Bi 2 WO 6 hollow tubes [23], BiOCl/Bi 2 WO 6 nanoflowers [24], and BiOBr/Bi 2 WO 6 microspheres [25], etc. But until now, few reports concerned with the photocatalytic activity of In 2 O 3 /Bi 2 WO 6 heterostructured microbelts synthesized by the electrospinning process.…”

Enhanced Photocatalytic Performance under Visible and Near-Infrared Irradiation of Cu1.8Se/Cu3Se2 Composite via a Phase Junction

“…Since TiO 2 was first reported on photocatalytic water splitting under ultraviolet (UV) light [1], photocatalysts have been widely studied in recent years [2,3,4,5]. Recently, photocatalysts with outstanding photocatalytic properties have been found, such as TiO 2 and ZnO in the UV spectral range [6,7], and CdS and Bi 2 WO 6 in the visible range [8,9], and only few semiconductors present near-infrared (NIR) photoactivity, such as Cu 2 (OH)PO 4 and WS 2 [10,11]. Nowadays, the development of effective ways to exploit near-infrared light (which accounts for more than 50% of solar energy) and develop UV-visible-near-infrared (UV-Vis-NIR) broad light spectrum photocatalysts is an important emerging topic [12].…”