Characterization of porous bismuth oxide (Bi₂O₃) nanoplates prepared by chemical bath deposition and post annealing

Abstract

Hierarchical porous β-Bi2O3 nanoplate thin films whose photocurrent was much higher than that of nonporous ones were firstly synthesized.

Photoelectrochemical properties of Bi 2 S 3 thin films deposited by successive ionic layer adsorption and reaction (SILAR) method

“…The largest photocurrent density in Fig.12b is 0.8 mA/cm 2 when the concentration of Na 2 S methanol solution is 0.005 M. This can attribute to the reduced harmful recombination of photoinduced carriers for its higher crystallinity comparing with that of Bi 2 S 3 TFs produced from 0.01 M Na 2 S methanol solution, while Bi 2 S 3 TFs of 0.02 M Na 2 S methanol solution displayed the lowest photocurrent density because of the smaller specific surface area and optical absorption coefficient. The large specific surface area would increase optical path length within the patterned Bi 2 S 3 thin film, resulting from multiple reflection of incident light, which might lead to enhanced photocurrent generation [12,33]. The relatively high optical absorption coefficient and high crystallinity would guarantee photo energy utilization efficiency of the sunlight.…”

Thermal Annealing Induced Controllable Porosity and Photoactive Performance of 2D ZnO Sheets

“…The excellent solar-driven photocatalytic hydrogen evolution has been observed for the mesoporous black anatase TiO 2 nanosheets synthesized via a biotemplate method combined with an ethanediamine encircling process [6]. Chemical bath derived porous 2D β-Bi 2 O 3 nanoplates show excellent photoinduced current density and have potential in the application of photoelectron catalysis [7]. For photocatalytic applications, both faces of 2D sheets and pores can be in contact with the target pollutant solution, hence favoring the sufficient utilization of the catalytic surface.…”

“…The 2D sheet-or plate-like oxide nanomaterials are beneficial in increasing the light interaction area in the oxides and are promising in photoactive device applications. Porous oxide nanomaterials made of these 2D oxides are reported to exhibit excellent photocatalytic and photoactivated properties [5][6][7]. The porous ZnO sheets being ultrathin, mesoporous, and single-crystalline have been shown as advantageous in photocatalytic degradation of methylene blue [5].…”

2D Materials Based on Main Group Element Compounds: Phases, Synthesis, Characterization, and Applications

“…Wang et al introduced a calcination method for the formation of β-Bi 2 O 3 nanoplates consisting of many nanopores, which were obtained after the calcination of a bismuth precursor at 350 °C. [243] However, the thickness of these nanoplates was significantly large (≈100 nm). A small size can be achieved by controlling the absorption of the precursor.…”