Fabrication of Bi modified Bi 2 S 3 pillared g-C 3 N 4 photocatalyst and its efficient photocatalytic reduction and oxidation performances

Spherical Bi2WO6/Bi2S3/MoS2 n-p Heterojunction with Excellent Visible-Light Photocatalytic Reduction Cr(VI) Activity

“…Figure 7 b shows the pseudo first-order kinetic curves of Bi 2 WO 6 , BBM-1, BBM-2, BBM-3, and BBM-4 for the photocatalytic reduction of Cr(VI) and the apparent reaction rate constant “ k ” ( Figure 7 c). The pseudo first-order model demonstrated here is shown by Equation (7) [ 41 ]: where t stands for the vis-light exposure time, C 0 represents the original concentration of Cr(VI) solution, and C t is the concentration of Cr(VI) solution at “ t ” irradiation time. The “ k ” values calculated by the linear fit of ln ( C 0 / C t ) and irradiation time (min) plots are 0.037, 0.223, 0.628, 3.612, and 1.379 × 10 −2 min −1 for Bi 2 WO 6 , BBM-1, BBM-2, BBM-3, and BBM-4, respectively.…”

“…For heterojunction photocatalysts, the XRD patterns display new diffraction peaks. The diffraction peaks located at 25.0 • correspond to the (130) crystal plane of Bi 2 S 3 [41]. Given the strong interaction force between Bi 3+ and S 2− , Bi 2 S 3 will be formed at relatively high temperatures [42].…”

“…Nanomaterials 2020, 10, x FOR PEER REVIEW 5 of 19 25.0° correspond to the (130) crystal plane of Bi2S3 [41]. Given the strong interaction force between Bi 3+ and S 2-, Bi2S3 will be formed at relatively high temperatures [42].…”

Photocatalytic Reduction on Bismuth-Based p-Block Semiconductors

“…100 In recent research, a strategy of dual-co-catalyst/Bi x O y X z heterostructures was proposed to prohibit the recombination of photo-excited electron-hole pairs, so photo-excited electrons can be utilised efficiently for CO 2 Apart from these noble metal co-catalysts, the semimetal bismuth with a photothermal property can be used as the co-catalyst to build metallic nanomaterial/Bi x O y X z heterostructures, in which bismuth nanoparticles not only inhibit the recombination of charge carriers, but also accelerate the conversion of light to thermal energy. 58,102 Taking the semimetal Bi mediated Bi x O y X z as an example, Bi/Bi 4 O 5 I 2 heterostructures were formed through a molecular precursor hydrolytic process. 58 10d).…”

“…In addition to the band alignment for the promotion of charge separation, other efforts were also undertaken towards enhancing the limited optical absorption of Bi-based p-block semiconductors and introducing surface active sites through the heterostructure strategy. 102,105 Recently, it was reported that a heterostructure composed of 2D Bi 2 O 4 nanoparticle decorated on BiOBr nanosheets was constructed in situ via a simple alkali post-treatment method assisted by light irradiation. 106 Moreover, the construction of 2D semiconductor/Bi x O y X z heterostructures was verified to have universal applicability to improve photoreduction activity, which has been widely employed on g-C 3 N 4 /Bi 4 O 5 I 2 107 and g-C 3 N 4 /BiOBr/Au heterostructures.…”