2D black phosphorus and tungsten trioxide heterojunction for enhancing photocatalytic performance in visible light

Abstract

BPNs in the WO3–BPNs heterojunction acted as a co-catalyst to enhance photo-generated electron–hole pairs separation and improve degradation performance.

Synergistic Hybridization of Twin-Induced Red/Black Phosphorus and Tungsten Oxide as Homo–Hetero Dynamic Dual Junctions for Z-Scheme CO2 Photoreduction

“…The C 1s peak observed is attributed to the charge correction before deconvolution was conducted. Based on Figure b, deconvolution of the P 2p spectrum of the RP/BP sample unveils two narrow peaks situated at 130.42 and 131.29 eV, which could be assigned to elemental P 2p 3/2 and 2p 1/2 of the P–P bonds, respectively, whereas a weaker and wider sub-band is apparent at approximately 135.02 eV, implying the presence of oxidized P species (P x O y ) . Comparatively, the two characteristic peaks of P 2p 3/2 and 2p 1/2 of the RP/BP@WO 3 sample situated at 129.70 and 130.60 eV, respectively, experience weakened intensities with the appearance of a new peak located at 133.90 eV, which could be ascribed to the formation of P–O–P, as validated by the O 1s spectra (Figure d).…”

Engineering Nanoscale Homo–Heterojunction for Robust Z‐Scheme CO2 Conversion through Synchronous Amalgamation of Oxygen‐Defective Ultrathin BiVO4 and Red/Black Phosphorus

“…In contrast, a broader and wider sub‐band can be found at 135.02 eV, suggesting that oxidized P species (P x O y ) is present. [ 27 ] Contrastingly, the P 2p 3/2 and 2p 1/2 characteristic peaks of the BiVO 4 –Ov@RP/BP sample located at 129.78 and 130.65 eV experience diminished intensities with the formation of two new peaks situated at 133.18 and 134.25 eV, attributing to the generation of O–P=O and P–O, respectively. [ 28,29 ] Notably, the P 2p 3/2 and 2p 1/2 XPS peaks for BiVO 4 –Ov@RP/BP are shifted toward lower binding energies with a difference of 0.64 eV in comparison to the RP/BP sample.…”

Van der Waals Black Phosphorus/Bi10O6S9 Heterojunction Harvesting Ambient Electric Field Energy for Enhanced Photoelectrochemical Sense

“…For example, Wang et al certificated that BP can effectively enhance the PEC performance of the WO 3 /BP heterojunction because the band gap of BP (0.5 eV) is much lower than that of WO 3 (2.5 eV), and the lower band gap energy is more likely to stimulate the generation of photogenerated electron−hole pairs. 59 Besides, several research studies have focused on the Bi-based semiconductors due to their excellent electrical, optical, and non-toxicity properties, such as bismuth salt (BiVO 4 ) and bismuth oxysulfides (Bi 2 O 2 S, Bi 2 OS 2 , Bi 10 O 6 S 9 , etc.). 60−62 For instance, Zhang et al synthesized a BP/BiVO 4 (010) heterostructure, which can accelerate the transfer rate and prevent the recombination of photogenerated carriers due to the built-in electric field and narrow band gap structure of the formed type-II heterostructure.…”

“…Several studies have been reported on obtaining better photogenerated charge separation and transfer by adding BP material. For example, Wang et al certificated that BP can effectively enhance the PEC performance of the WO 3 /BP heterojunction because the band gap of BP (0.5 eV) is much lower than that of WO 3 (2.5 eV), and the lower band gap energy is more likely to stimulate the generation of photogenerated electron–hole pairs . Besides, several research studies have focused on the Bi-based semiconductors due to their excellent electrical, optical, and non-toxicity properties, such as bismuth salt (BiVO 4 ) and bismuth oxysulfides (Bi 2 O 2 S, Bi 2 OS 2 , Bi 10 O 6 S 9 , etc.…”