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Synthesis of BiPO4/Bi2S3 Heterojunction with Enhanced Photocatalytic Activity under Visible-Light Irradiation.

Lu M, Yuan G, Wang Z, Wang Y, Guo J - Nanoscale Res Lett (2015)

Bottom Line: It was found that BiPO4 was regular rods with smooth surfaces.The enhanced photocatalytic performance could be ascribed to synergistic effect of BiPO4/Bi2S3 heterojunction, in which the attached Bi2S3 nanoparticles could improve visible-light absorption and the BiPO4/Bi2S3 heterojunction suppressed the recombination of photogenerated electron-hole pairs.Our work suggested that BiPO4/Bi2S3 heterojunction could be a potential photocatalyst under visible light.

View Article: PubMed Central - PubMed

Affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Soochow, 215123, China.

ABSTRACT
BiPO4/Bi2S3 photocatalysts were successfully synthesized by a simple two-step hydrothermal process, which involved the initial formation of BiPO4 rod and then the attachment of Bi2S3 through ion exchange. The as-synthesized products were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and UV-vis diffuse reflectance spectra (UV-vis DRS). It was found that BiPO4 was regular rods with smooth surfaces. However, BiPO4/Bi2S3 heterojunction had a rough surface, which could be attributed to the attachment of Bi2S3 on the surface of BiPO4 rods. The BiPO4/Bi2S3 composite exhibited better photocatalytic performance than that of pure BiPO4 and Bi2S3 for the degradation of methylene blue (MB) and Rhodamine B (RhB) under visible light. The enhanced photocatalytic performance could be ascribed to synergistic effect of BiPO4/Bi2S3 heterojunction, in which the attached Bi2S3 nanoparticles could improve visible-light absorption and the BiPO4/Bi2S3 heterojunction suppressed the recombination of photogenerated electron-hole pairs. Our work suggested that BiPO4/Bi2S3 heterojunction could be a potential photocatalyst under visible light.

No MeSH data available.


TEM images of BiPO4 (a), BB-2 (b, c), and HRTEM image of BB-2 (d)
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Fig4: TEM images of BiPO4 (a), BB-2 (b, c), and HRTEM image of BB-2 (d)

Mentions: TEM and HRTEM images are shown in Fig. 4, which display identified results as those of SEM analysis. From Fig. 4a, one can see that pure BiPO4 are regular rods with a smooth surface. While BiPO4/Bi2S3 heterojunction shows a rough surface, suggesting the successful attachment of Bi2S3 on the surface of BiPO4 rods. Furthermore, the lattice spacings can be clearly seen in the corresponding HRTEM image (Fig. 4d). The fringe spacing of 0.47 nm is indexed to the (1 1 0) lattice plane of monoclinic BiPO4, while 0.32 nm is agreed with the (1 0 2) lattice plane of Bi2S3. Therefore, it can be summarized that BiPO4/Bi2S3 heterojunction is achieved through a facile ion-exchange method.Fig. 4


Synthesis of BiPO4/Bi2S3 Heterojunction with Enhanced Photocatalytic Activity under Visible-Light Irradiation.

Lu M, Yuan G, Wang Z, Wang Y, Guo J - Nanoscale Res Lett (2015)

TEM images of BiPO4 (a), BB-2 (b, c), and HRTEM image of BB-2 (d)
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4593991&req=5

Fig4: TEM images of BiPO4 (a), BB-2 (b, c), and HRTEM image of BB-2 (d)
Mentions: TEM and HRTEM images are shown in Fig. 4, which display identified results as those of SEM analysis. From Fig. 4a, one can see that pure BiPO4 are regular rods with a smooth surface. While BiPO4/Bi2S3 heterojunction shows a rough surface, suggesting the successful attachment of Bi2S3 on the surface of BiPO4 rods. Furthermore, the lattice spacings can be clearly seen in the corresponding HRTEM image (Fig. 4d). The fringe spacing of 0.47 nm is indexed to the (1 1 0) lattice plane of monoclinic BiPO4, while 0.32 nm is agreed with the (1 0 2) lattice plane of Bi2S3. Therefore, it can be summarized that BiPO4/Bi2S3 heterojunction is achieved through a facile ion-exchange method.Fig. 4

Bottom Line: It was found that BiPO4 was regular rods with smooth surfaces.The enhanced photocatalytic performance could be ascribed to synergistic effect of BiPO4/Bi2S3 heterojunction, in which the attached Bi2S3 nanoparticles could improve visible-light absorption and the BiPO4/Bi2S3 heterojunction suppressed the recombination of photogenerated electron-hole pairs.Our work suggested that BiPO4/Bi2S3 heterojunction could be a potential photocatalyst under visible light.

View Article: PubMed Central - PubMed

Affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Soochow, 215123, China.

ABSTRACT
BiPO4/Bi2S3 photocatalysts were successfully synthesized by a simple two-step hydrothermal process, which involved the initial formation of BiPO4 rod and then the attachment of Bi2S3 through ion exchange. The as-synthesized products were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and UV-vis diffuse reflectance spectra (UV-vis DRS). It was found that BiPO4 was regular rods with smooth surfaces. However, BiPO4/Bi2S3 heterojunction had a rough surface, which could be attributed to the attachment of Bi2S3 on the surface of BiPO4 rods. The BiPO4/Bi2S3 composite exhibited better photocatalytic performance than that of pure BiPO4 and Bi2S3 for the degradation of methylene blue (MB) and Rhodamine B (RhB) under visible light. The enhanced photocatalytic performance could be ascribed to synergistic effect of BiPO4/Bi2S3 heterojunction, in which the attached Bi2S3 nanoparticles could improve visible-light absorption and the BiPO4/Bi2S3 heterojunction suppressed the recombination of photogenerated electron-hole pairs. Our work suggested that BiPO4/Bi2S3 heterojunction could be a potential photocatalyst under visible light.

No MeSH data available.