A novel step-scheme BiVO4/Ag3VO4 photocatalyst for enhanced photocatalytic degradation activity under visible light irradiation

Liu, Lizhong; Hu, Taiping; Dai, Kai; Zhang, Jinfeng; Liang, Changhao

doi:10.1016/s1872-2067(20)63560-4

Cited by 256 publications

(70 citation statements)

References 72 publications

(68 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Ag 3 PO 4 particle also maintains a relatively large size (0.5–2 μm), which further affects its photocatalytic efficiency because it has a low specific surface area [ 22 ]. Loading Ag 3 PO 4 on other semiconductors or two-dimensional (2D) materials can effectively enhance its photostability of and reduce its size [ [24] , [25] , [26] ], whereas Ag 3 PO 4 -based traditional heterojunction and Z-scheme heterojunction either weaken its oxidation/reduction capacity or decrease the number of photoexcited carriers, which also weakens the photocatalytic performance [ [27] , [28] , [29] , [30] , [31] , [32] , [33] , [34] , [35] ].…”

Section: Introductionmentioning

confidence: 99%

Ag3PO4 decorated black urchin-like defective TiO2 for rapid and long-term bacteria-killing under visible light

Liu

Zheng

et al. 2021

Bioactive Materials

View full text Add to dashboard Cite

Both phototherapy via photocatalysts and physical puncture by artificial nanostructures are promising substitutes for antibiotics when treating drug-resistant bacterial infectious diseases. However, the photodynamic therapeutic efficacy of photocatalysts is seriously restricted by the rapid recombination of photogenerated electron–hole pairs. Meanwhile, the nanostructures of physical puncture are limited to two-dimensional (2D) platforms, and they cannot be fully used yet. Thus, this research developed a synergistic system of Ag 3 PO 4 nanoparticles (NPs), decorated with black urchin-like defective TiO 2 (BU–TiO 2-X /Ag 3 PO 4 ). These NPs had a decreased bandgap compared to BU-TiO 2-X , and BU-TiO 2-X /Ag 3 PO 4 (3:1) exhibited the lowest bandgap and the highest separation efficiency for photogenerated electron–hole pairs. After combination with BU-TiO 2-X , the photostability of Ag 3 PO 4 improved because the oxygen vacancy of BU-TiO 2-X retards the reduction of Ag + in Ag 3 PO 4 into Ag 0 , thus reducing its toxicity. In addition, the nanospikes on the surface of BU-TiO 2-X can, from all directions, physically puncture bacterial cells, thus assisting the hybrid's photodynamic therapeutic effects, alongside the small amount of Ag + released from Ag 3 PO 4 . This achieves synergy, endowing the hybrid with high antibacterial efficacy of 99.76 ± 0.15% and 99.85 ± 0.09% against Escherichia coli and Staphylococcus aureus , respectively, after light irradiation for 20 min followed by darkness for 12 h. It is anticipated that these findings may bring new insight for developing synergistic treatment strategies against bacterial infectious diseases or pathogenic bacterial polluted environments.

show abstract

Section: Introductionmentioning

confidence: 99%

Ag3PO4 decorated black urchin-like defective TiO2 for rapid and long-term bacteria-killing under visible light

Liu

Zheng

et al. 2021

Bioactive Materials

View full text Add to dashboard Cite

show abstract

“…demonstrated the lowest PL emission intensity, which is indicative of the highest charge transfer e ciency and the possibility of the highest photocatalytic oxidation activity [38]. proportional to the charge transfer resistance.…”

Section: Conclusion Of Experiments Proves That Exists An Optimum Compomentioning

confidence: 96%

Direct Z-scheme GdFeO3/g-C3N4 heterostructures with outstanding photocatalytic activity

Wang

Feng

et al. 2021

Preprint

View full text Add to dashboard Cite

The direct Z-scheme GdFeO3/g-C3N4 photocatalysts used without any mediators were obtained using an ultrasonic synthesis approach. The composites’ structures, elemental composition and morphologies, as well as optical, electrochemical and catalytic properties, were thoroughly analyzed. GdFeO3/g-C3N4-3:7 composite exhibited an excellent enhanced light-harvesting ability and low recombination rate, which manifested into an outstanding visible-light driven activity, 7.7 and 2.3 times more than of stand-alone g-C3N4 and GdFeO3, respectively. A mechanism responsible for the photocatalytic property enhancement was proposed. The stability and reusability of the GdFeO3/g-C3N4 composites make them excellent materials for practical applications related to the removal of organic pollutants from the wastewater.

show abstract

“…Furthermore, Figure 3B revealed that all of the obtained RGO 1% /AgVO 3 /AgBr 30% , RGO 1% /AgVO 3 , GO/ AgVO 3 , and AgVO 3 samples had two peaks at 367.7 eV and 373.7 eV, which were assigned to Ag 3d 5/2 and 3d 3/2 , respectively. 23,37 Figure 3C exhibited the corresponding peak of C 1 s existed in all of the RGO 1% /AgVO 3 /AgBr 30% , RGO 1% /AgVO 3 well and GO/AgVO 3 composites. Three peaks were observed at 284.8, 286.8, and 288.6 eV, corresponding to the characteristic peaks of C-C, C-O, and C-C=O, respectively.…”

Section: Morphology and Microstructurementioning

confidence: 98%

“…21 Moreover, AgVO 3 also has a strong harvest ability for visible light due to its narrow band gap structure and highly dispersed valence band, which could be ascribed to its unique hybridized valence band constructed by Ag 4d, V 3d, and O 2p orbitals. 22,23 Although AgVO 3 shows superior photochemical properties, its application has been extremely limited owing to its narrow band gap structure, which results that the photo-generated electrons and holes could not be separated effectively. 24 Hence, it is very important to improve the photocatalytic activity of AgVO 3 materials via inhibiting the recombination of photogenerated charge carriers' effectivity.…”

Section: Introductionmentioning

confidence: 99%

“…Particularly, AgVO 3 has been paid much attention owing to its stable structure, excellent photochemical properties, and wide potential applications 21 . Moreover, AgVO 3 also has a strong harvest ability for visible light due to its narrow band gap structure and highly dispersed valence band, which could be ascribed to its unique hybridized valence band constructed by Ag 4d, V 3d, and O 2p orbitals 22,23 . Although AgVO 3 shows superior photochemical properties, its application has been extremely limited owing to its narrow band gap structure, which results that the photo‐generated electrons and holes could not be separated effectively 24 .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Designing effective and stable S‐scheme RGO/AgVO₃/AgBr hybrid with enhanced photocatalytic performance

et al. 2021

View full text Add to dashboard Cite

The low separation of photogenerated electron-hole pairs and cycle stability has been the main bottleneck which restricts the development of photocatalytic technology for water purification. Here, RGO/AgVO 3 composites were fabricated by photoultrasonic assisted reduction method, and AgBr nanoparticles were assembled on the surface of RGO/AgVO 3 via an in situ ion exchange method. A series of characterization and experimental results indicated that the introduction of RGO influenced the growth of crystal phase for AgVO 3 nanorods, resulting that AgVO 3 nanorods became thicker and shorter with the increase in RGO content. Moreover, RGO could also work as a bridge to promote the migration of electrons, leading different improvement for photocatalytic activity. Furthermore, in situ growth of AgBr on the surface of AgVO 3 nanorods could prevent its agglomeration and exfoliation, thus improving the photocatalytic activity and cycle stability of composites. RGO 1% /AgVO 3 /AgBr 30% exhibited excellent photocatalytic activity and stability for methylene blue (MB) degradation due to its unique structure, and its removal ratio reached at 96.2% within 50 min. Meanwhile, the separation of photogenerated electron-hole pairs of AgVO 3 was markedly improved due to the introduction of RGO and AgBr. Based on the trapping experiments and theoretical calculation of band gap, a possible S-scheme photocatalytic mechanism for improved photocatalytic activity was proposed.

show abstract

A novel step-scheme BiVO4/Ag3VO4 photocatalyst for enhanced photocatalytic degradation activity under visible light irradiation

Cited by 256 publications

References 72 publications

Ag3PO4 decorated black urchin-like defective TiO2 for rapid and long-term bacteria-killing under visible light

Ag3PO4 decorated black urchin-like defective TiO2 for rapid and long-term bacteria-killing under visible light

Direct Z-scheme GdFeO3/g-C3N4 heterostructures with outstanding photocatalytic activity

Designing effective and stable S‐scheme RGO/AgVO₃/AgBr hybrid with enhanced photocatalytic performance

Contact Info

Product

Resources

About

A novel step-scheme BiVO4/Ag3VO4 photocatalyst for enhanced photocatalytic degradation activity under visible light irradiation

Cited by 256 publications

References 72 publications

Ag3PO4 decorated black urchin-like defective TiO2 for rapid and long-term bacteria-killing under visible light

Ag3PO4 decorated black urchin-like defective TiO2 for rapid and long-term bacteria-killing under visible light

Direct Z-scheme GdFeO3/g-C3N4 heterostructures with outstanding photocatalytic activity

Designing effective and stable S‐scheme RGO/AgVO3/AgBr hybrid with enhanced photocatalytic performance

Contact Info

Product

Resources

About

Designing effective and stable S‐scheme RGO/AgVO₃/AgBr hybrid with enhanced photocatalytic performance