Unique band structure enhanced visible light photocatalytic activity of phosphorus-doped BiOI hierarchical microspheres

Abstract

In this article, phosphorus (P)-doped BiOI hierarchical microspheres were prepared via a facile hydrolytic method at room temperature.

Study of Annealing Temperature Effect on the Photovoltaic Performance of BiOI-Based Materials

“…The bandgap energy order haf a good agreement with the blue-shift phenomenon in the absorbance spectra of those annealed samples. Our bandgap energy of BiOI was also in line with the calculated BiOI from the previous report with order: BiOI < Bi 7 O 9 I 3 < Bi 5 O 7 I which have the agreement with some references [26,45]. The bandgap energy of Bi 5 O 7 I was also reported to be slightly higher than Bi 2 O 3 [46], and for β-Bi 2 O 3 , it was around 2.15 eV [47].…”

“…which have the agreement with some references [26,45]. The bandgap energy of Bi5O7I was also reported to be slightly higher than Bi2O3 [46], and for β-Bi2O3, it was around 2.15 eV [47].…”

Synergistic photocatalytic effect of BiOBr–BiOI heterojunctions due to appropriate layer stacking

“…Among the great variety of semiconductor materials with promising characteristics in the field of heterogeneous photocatalysis, bismuth oxyhalides (BiOX, where X = F, Cl, Br, and I) have received attention due to their structure formed by slabs of [Bi 2 O 2 ] 2+ and 2[X] − ions that give open layered structures. [10][11][12][13] Only two of these four semiconductors are visible-light active: bismuth oxybromide (BiOBr) and bismuth oxyiodide (BiOI). BiOBr is a non-toxic material with an E g of around 2.8 eV that is used for the reduction of CO 2 and water splitting.…”

Photocatalytic Reduction of Hexavalent Chromium (Cr6+) Over BiOI Calcined at Different Temperature Under Visible Light Irradiation

“…[9] Apart from visible light utilization, bismuth oxyiodide (BiOI) is hampered by high charge carrier recombination of which reduce its photocatalytic activity count. Different researchers have studied on the modification of BiOI to counteract the challenge of charge carrier recombination and band gap engineering including structural modification, [10][11][12][13][14][15] doping, [16][17][18] modification with carbonaceous materials, [19][20][21][22][23] plasmonic material [24] and heterojunction composite formation. [25][26][27][28][29][30][31] Herein, this study investigated the effect of calcination temperature on the phase transformation and photocatalytic reduction of hexavalent chromium performance of bismuth…”

“…Apart from visible light utilization, bismuth oxyiodide (BiOI) is hampered by high charge carrier recombination of which reduce its photocatalytic activity count. Different researchers have studied on the modification of BiOI to counteract the challenge of charge carrier recombination and band gap engineering including structural modification, [10–15] doping, [16–18] modification with carbonaceous materials, [19–23] plasmonic material [24] and heterojunction composite formation [25–31] …”