BiVO₄/CeO₂ Nanocomposites with High Visible-Light-Induced Photocatalytic Activity

Abstract

Preparation of bismuth vanadate and cerium dioxide (BiVO4/CeO2) nanocomposites as visible-light photocatalysts was successfully obtained by coupling a homogeneous precipitation method with hydrothermal techniques. The BiVO4/CeO2 nanocomposites with different mole ratios were synthesized and characterized by X-ray diffraction (XRD), Raman spectroscopy, and transmission electron microscopy (TEM). Absorption range and band gap energy, which are responsible for the observed photocatalyst behavior, were investigated by UV-vis diffuse reflectance (UV-vis DR) spectroscopy. Photocatalytic activities of the prepared samples were examined by studying the degradation of model dyes Methylene Blue, Methyl Orange, and a mixture of Methylene Blue and Methyl Orange solutions under visible-light irradiation (>400 nm). Results clearly show that the BiVO4/CeO2 nanocomposite in a 0.6:0.4 mol ratio exhibited the highest photocatalytic activity in dye wastewater treatment.

Recent Advances in the Synthesis of Metal Oxide Nanofibers and Their Environmental Remediation Applications

“…Furthermore, Bi and its oxides are well-known, cost-effective and multifunctional nanostructured materials, and have attracted numerous interest because of their excellent photocatalytic activity [162,163]. In light to this, bismuth vanadate and cerium dioxide (BiVO 4 /CeO 2 ) composite nanofibers were produced by electrospinning and a homogeneous precipitation method with hydrothermal techniques [164]. Their visible-light-driven photocatalysis was evaluated via the degradation of methylene blue, methyl orange, and a mixture of those dyes.…”

Fabricated CeO2 nanopowders as a novel sensing platform for advanced forensic, electrochemical and photocatalytic applications

“…To study the effect of pH, 5 ppm dye concentration was maintained constant in 100 ml of water with 100 mg of catalytic load by varying pH concentrations. For pH 9, CeO 2 NPs have shown good photocatalytic activity while for pH 3 it exhibit poor activity which confirms that in basic medium activity it was more when compared with the acidic medium (Magesh et al 2009;Wetchakun et al 2012). Figure 18 shows the schematic representation of the mechanism involved in photocatalytic degradation of the MB dye using CeO 2 NPs as photocatalyst.…”

Controllable Synthesis and Growth Mechanism of Ceria Nanocubes by Template‐Free Hydrothermal Method

“…In a typical synthesis, 0.0035 mol of Ce(NO 3 Ltd) and 1.05 mol KOH (Tianjin Fuchen Chemical Reagents Factory) were dissolved into 70 mL distilled water and stirred for 30 min with magnetic stirrer. The obtained clear solution was transferred to a Teflon-line stainless steel autoclave, which was sealed and maintained at 230°C for 24 h and then cooled to room temperature naturally.…”

“…[1] CeO 2 has excellent oxygen storage and release capability because of its valence change between possible oxidation states of Ce(III) and Ce(IV). It has been widely used in catalytic materials, [2][3][4][5][6][7][8] UV absorption, [9,10] oxygen sensing materials, [11] solid oxide fuel cells [12,13] due to its unique structure and properties.…”