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

Abstract

The In 2 O 3 /Bi 2 WO 6 heterostructured microbelts with the diameters around 500 nm-1 lm have been fabricated by electrospinning combined with the annealing process. The as-prepared microbelts were characterized by thermogravimetric and differential scanning calorimetry, fourier transform infrared spectroscope, X-ray diffraction, scanning electron microscope and transmission electron microscope. It was found that the In 2 O 3 /Bi 2 WO 6 microbelts reported here showed the well-defined morphology. Additionally, In 2 O 3 /Bi 2 WO 6 heterostructured microbelts exhibit the enhanced photocatalytic activity under the simulated sunlight irradiation compared with the pure Bi 2 WO 6 microbelts.

Heterojunction photoanodes for solar water splitting using chemical-bath-deposited In2O3 micro-cubes and electro-sprayed Bi2WO6 textured nanopillars

“…The bandgap energy values of the pristine Bi 2 WO 6 and In 2 O 3 lms were extrapolated from the Tauc plot, which yielded 2.7 and 2.5 eV, respectively. 27,28 The bandgap energy of the In24-Bi80 bilayer lm was 2.4 eV, which is in agreement with the value reported by Liu et al 21 This reduced bandgap is favorable to absorb the increased range of the light spectrum. Note that the conduction band (E cb ) and valance band (E vb ) edge positions can be determined by using the empirical formula such as, E cb ¼ E vb À E g and E vb ¼ X À 4.5 + 0.5E g , where X is the absolute electronegativity, 4.5 eV is the energy of free electrons on a hydrogen scale.…”

“…Liu et al21 fabricated a bilayer lm of In 2 O 3 /Bi 2 WO 6 using electrospinning, but the application of the lm was limited to the photodegradation of methyl-orange dye.Herein, we demonstrate the fabrication of In 2 O 3 micro-cubes via chemical bath deposition (CBD) on an indium tin oxide (ITO) substrate. Highly textured Bi 2 WO 6 nano-pillars were grown on the surfaces of the In 2 O 3 micro-cubes, creating an In 2 O 3 /Bi 2 WO 6 heterojunction lm.…”

Fabrication of cubic In2O3/Bi2WO6 and study of its photocatalytic performance in removal of florfenicol antibiotic from aqueous media: Experimental and molecular dynamic simulation

“…[ 22,23 ] Qin et al [ 24 ] studied the photocatalytic characteristics of Bi 2 WO 6 /In 2 O 3 heterojunction and its efficient photocatalytic performance for the degradation of organic pollutants. Liu et al [ 25 ] synthesized In 2 O 3 /Bi 2 WO 6 heterostructured microbelts and its photocatalytic properties were investigated for methyl orange degradation. Chu et al [ 26 ] studied degradation of tetracycline by mesoporous Bi 2 WO 6 under visible light irradiation.…”