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A novel Z-scheme AgBr/Ag2MoO4@ZnO photocatalyst was fabricated via a hydrothermal process and in situ growth method. X-ray powder diffraction, scanning electron microscopy and transmission electron microscopy were used to determine the structure of the photocatalyst. The results showed that the composites were tightly connected by the (101) lattice plane of ZnO, the (222) plane of Ag2MoO4 and the (200) lattice plane of AgBr. Because of the strong redox activity and good separability of photoelectrons and holes induced by the Z-scheme structure, the photodegradation rate for ciprofloxacin (CIP) solution was 80.5% by the photocatalysis of 0.5 AgBr/Ag2MoO4@ZnO. In addition, more than 99.999% of Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa cells were killed within 60 min. These results demonstrate that AgBr/Ag2MoO4@ZnO is a promising photocatalyst, which can be used in organic pollutant degradation and the photocatalytic antibacterial area. [ABSTRACT FROM AUTHOR]

The microstructural characteristics of nickel-based polycrystalline superalloy GH4037 turbine blades that have been in service for 1600 h have been studied by transmission electron microscopy. In particular, emphasis has been placed on paired dislocations and their interactions with γ′ precipitates. Paired dislocations are universal and coexist with Orowan loops occasionally. The attractive force due to anti-phase boundary energy and the repulsive force between two 1/2<110> dislocations act on paired dislocations simultaneously, causing different morphologies of edge dislocations. Since the shear stress required by paired dislocations to cut through γ/γ′ structure is much lower than Orowan stress of single matrix dislocation, the major formation mechanism is dislocation pairing. A large number of paired dislocations slipping on the same {111} plane can form slip band and can shear off γ′ particles, which may directly lead to the formation of microcracks. [ABSTRACT FROM AUTHOR]

With the discharge of large amount of organic pollutants and antibiotics into the water environment, the water cycle has been seriously polluted, and at the same time, various drug-resistant bacteria have emerged in succession, which poses a serious threat to human health. In recent years, photocatalytic nanomaterials have become a research hotspot in the antimicrobial area. In this study, AgBr/AgVO 3 photocatalysts were prepared by a hydrothermal process and an in situ growth method. The composites were tightly connected by the (501) plane of AgVO 3 and the (200) lattice plane of AgBr. The photocatalytic activity was tested by degrading Rhodamine B (RhB) solution under visible-light, and the result indicated that the photodegradation rate for RhB solution was 92.3% by the photocatalysis with 0.5AgBr/AgVO 3 and the photocatalytic performance of 0.5AgBr/AgVO 3 was improved compared to pure AgVO 3 and AgBr. In addition, more than 99.997% of E. coli , S. aureus , and P. aeruginosa cells were killed by the photocatalysis with 0.5AgBr/AgVO 3 within 30 min. These results demonstrated that the 0.5AgBr/AgVO 3 heterojunction photocatalyst could be widely used in the treatment of environmental pollution and in the antibacterial field., Competing Interests: The authors declare that they have no competing interests., (This journal is © The Royal Society of Chemistry.)

A novel Z-scheme AgBr/Ag 2 MoO 4 @ZnO photocatalyst was fabricated via a hydrothermal process and in situ growth method. X-ray powder diffraction, scanning electron microscopy and transmission electron microscopy were used to determine the structure of the photocatalyst. The results showed that the composites were tightly connected by the (101) lattice plane of ZnO, the (222) plane of Ag 2 MoO 4 and the (200) lattice plane of AgBr. Because of the strong redox activity and good separability of photoelectrons and holes induced by the Z-scheme structure, the photodegradation rate for ciprofloxacin (CIP) solution was 80.5% by the photocatalysis of 0.5 AgBr/Ag 2 MoO 4 @ZnO. In addition, more than 99.999% of Escherichia coli , Staphylococcus aureus , and Pseudomonas aeruginosa cells were killed within 60 min. These results demonstrate that AgBr/Ag 2 MoO 4 @ZnO is a promising photocatalyst, which can be used in organic pollutant degradation and the photocatalytic antibacterial area.