One-pot hydrothermal synthesis of BiPO4/BiVO4 with enhanced visible-light photocatalytic activities for methylene blue degradation
- 20 December 2013
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in RSC Advances
- Vol. 4 (21), 10968-10974
- https://doi.org/10.1039/c3ra45288c
Abstract
Novel composite BiPO4/BiVO4 photocatalysts with different amounts of BiPO4 were synthesized by a simple one-pot hydrothermal method at pH = 0.5. The obtained photocatalysts were systematically characterized using X-ray powder diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED), X-ray photoelectron spectroscopy (XPS) and UV-vis diffuse reflectance spectroscopy (DRS). The photocatalytic activities of BiPO4/BiVO4 were evaluated by the degradation of methylene blue (MB), methyl orange (MO) and rhodamine B (RhB) under visible light (λ > 400 nm). The results showed that all of the BiPO4/BiVO4 composites exhibited much higher photocatalytic activities than pure BiVO4 and BiPO4. Among the composites, 10% BiPO4/BiVO4 could degrade 92.1% MB after 5 h illumination and possessed the best photocatalytic activity. Meanwhile, the k value of 10% BiPO4/BiVO4 was 0.503 h−1, which was twice that of pure BiVO4. The enhanced photocatalytic activity could be mainly ascribed to the suitable BiPO4/BiVO4 heterojunction interface which could effectively promote the separation of photoinduced electron–hole pairs. Moreover, the radical scavengers experiments demonstrated that ˙O2 − and h+ were the main reactive species for MB degradation under visible light.Keywords
This publication has 59 references indexed in Scilit:
- A novel high-efficiency visible-light sensitive Ag2CO3 photocatalyst with universal photodegradation performances: Simple synthesis, reaction mechanism and first-principles studyApplied Catalysis B: Environment and Energy, 2013
- Preparation of p–n junction Cu2O/BiVO4 heterogeneous nanostructures with enhanced visible-light photocatalytic activityApplied Catalysis B: Environment and Energy, 2013
- Synthesis, characterization and photocatalytic property of AgBr/BiPO4 heterojunction photocatalystDalton Transactions, 2012
- Dramatic Activity of C3N4/BiPO4 Photocatalyst with Core/Shell Structure Formed by Self‐AssemblyAdvanced Functional Materials, 2012
- Epitaxial Growth of CdS Nanoparticle on Bi2S3 Nanowire and Photocatalytic Application of the HeterostructureThe Journal of Physical Chemistry C, 2011
- Exceptional visible-light-driven photocatalytic activity over BiOBr–ZnFe2O4 heterojunctionsChemical Communications, 2011
- Size-controlled synthesis of BiPO4 nanocrystals for enhanced photocatalytic performanceJournal of Materials Chemistry, 2011
- Effects of europium doping on the photocatalytic behavior of BiVO4Journal of Hazardous Materials, 2010
- Effects of Hydrothermal Temperature on the Microstructures of BiVO4 and Its Photocatalytic O2 Evolution Activity under Visible LightInorganic Chemistry, 2009
- Photoelectrocatalytic materials for environmental applicationsJournal of Materials Chemistry, 2009