Electrospinning construction of Bi₂WO₆/RGO composite nanofibers with significantly enhanced photocatalytic water splitting activity

Abstract

Bi 2 WO 6 /Reduced graphene oxide (RGO) composite nanofibers were successfully fabricated by calcining the electrospun PVP/RGO/[(NH 4 ) 10 W 12 O 41 +Bi(NO 3 ) 3 ] composite nanofibers. The products were investigated in detail by X-ray diffraction technique (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET) method, UV-Vis diffuse reflectance spectroscopy and X-ray photoelectron spectroscopy (XPS). Furthermore, photoluminescence 10 spectra (PL) and electrochemical impedance spectroscopy (EIS) of the samples were determined to explain the mechanism for the significant enhancement of the photocatalytic performance of Bi 2 WO 6 /RGO composite nanofibers. Bi 2 WO 6 /RGO composite nanofibers are pure orthorhombic phase with space group of B2ab, and the diameter is 132±11 nm. Bi 2 WO 6 /RGO composite nanofibers are composed of nanoparticles with the diameter ranging from 30 nm to 50 nm. The Bi 2 WO 6 /6%RGO 15 composite nanofibers used for photocatalytic water splitting exhibit the highest H 2 production, which is improved 5.8 times compared to pure Bi 2 WO 6 nanofibers. This could be ascribed to two points: the onedimensional Bi 2 WO 6 /RGO composite nanofibers constructed by electrospinning technique have a better capability of electron transportation and intimate interfacial contact area between Bi 2 WO 6 and RGO; the adding of RGO has excellent conductivity which could transfer the photogenerated electrons timely and 20 inhibit the recombination of electrons and holes. The study provides a new method to prepare photocatalytic material for converting water and solar energy to clean energy. 65 species (93.6 %). More recently, an electrostatic self-assembly approach was developed to construct Bi 2 WO 6 /RGO nanocomposites by Yang [25] . The photocatalytic reductive ability of the composites is significantly enhanced, while its oxidation ability is improved slightly. Nanofibers become a hotspot of 70

Visible-light-driven photocatalytic degradation of rhodamine B using Bi2WO6/GO deposited on polyethylene terephthalate fabric

“…However, the intensity of Bi 2 WO 6 /2 g/L GO deposited PET fabric is lower than that of Bi 2 WO 6 deposited PET fabric, indicating that Bi 2 WO 6 /2 g/L GO deposited PET fabric exhibits a high separation rate of photoinduced electron-hole pairs. Thus, introduction of GO can inhibit recombination of photo-generated carriers of Bi 2 WO 6 and improve the photocatalytic properties, which is in good agreement with other reports [36].…”

Enhanced Photocatalytic Degradation Activity of BiFeO3 Microspheres by Decoration with g-C3N4 Nanoparticles

“…Semiconductor based photocatalysis has attracted considerable attentions owing to its promising application in solar energy conversion and environmental purification [1][2][3][4][5][6] . Perovskite oxide has been proven to be an important class of photocatalysts 7 .…”

Visible-Light-Mediated Electrocatalytic Activity in Reduced Graphene Oxide-Supported Bismuth Ferrite

“…The red shift suggests a certain electronic interaction between BFO nanoparticles and the RGO sheet. 45 The binding energy of O 1s in BFO nanoparticles emerges at 530.2 and 531.2 eV corresponding to the lattice oxygen of Fe–O and Bi–O bonds, respectively, shown in Figure S5 ( Supporting Information ). The O 1s spectra of RGO–BFO are deconvoluted into four signature peaks corresponding to Fe–O, Bi–O, C=O, and C–O, as shown in Figure 3 c. The Fe–O and Bi–O bonds are positioned at 529.9 and 530.8 eV, respectively.…”