Biomass-derived membrane used for uranium extraction of natural seawater from the East China Sea through the formation of metal–phenolic networks.

We report a Pd-mediated synthesis and crystal structure of a new chiral Ag 33 (SCH 2 CH 2 Ph) 24 (PPh 3 ) 4 nanocluster with an open shell electronic structure. The single-crystal X-ray structure reveals that the kernel of the cluster comprises a keplerate Ag 13 icosahedron core with one Ag atom in the center and a shell framework of Ag 20 S 24 P 4 block. The Ag 20 S 24 P 4 shell framework is fully arranged by helical −S−Ag−S− staples along four Ag−P bonds involved C3 axis, which endows the kernel structure of the nanocluster chirality and symmetry in the T point group. The geometry and chirality of the Ag 33 nanocluster are further confirmed by nuclear magnetic resonance (NMR), electronic circular dichroism (ECD) spectra, and time-dependent density functional theory calculations. Our results show that the formation of the new chiral Ag 33 nanocluster is strongly dependent on the presence of Pd regent with the form of Pd(PPh 3 ) 4 functioning in the synthesis. This work not only presents a novel chiral structure of the silver nanocluster but also provides a new strategy for the development of a novel nanocluster.

Hierarchical Bi(3.64)Mo(0.36)O(6.55)/Bi2MoO6 isotype heterostructures were successfully prepared via a one-pot hydrothermal route by using Bi2O3 porous nanospheres as a sacrificial template. By tuning the reaction time, the formation process of the Bi(3.64)Mo(0.36)O(6.55)/Bi2MoO6 heterostructure involving Mo etching, phase transition and anisotropic growth was clearly identified. More importantly, the Bi(3.64)Mo(0.36)O(6.55)/Bi2MoO6 heterostructure displayed remarkably enhanced photocatalytic activity for dye photodegradation than pure phase bismuth molybdate due to the efficient electron-hole separation and the interfacial photogenerated hole migration from inside the Bi(3.64)Mo(0.36)O(6.55) layer to outside the Bi2MoO6 layer. The opposite hole migration from the outer layer to the inner layer was also detected in Bi2O3/Bi2WO6 heterostructures, which resulted in the decrease of photocatalytic activity, further verifying the importance of hole migration direction. This work provides a novel route to fabricate heterostructured photocatalysts, as well as gives a strategy for mediating the charge migration to improve photocatalytic performance.

defect clusters facilitate 1O2 production for molecular oxygen activation in photocatalysis.

A BiPO4 nanostructure modified with Bi nanoparticles rich in oxygen vacancies in the surface and subsurface was prepared through a one-pot solvothermal treatment utilizing the weak reductive ability of ethylene glycol (EG). The presence of Bi nanocrystals and oxygen vacancies is beneficial for the separation and consumption of photogenerated electrons and holes where Bi nanocrystals act as active sites for the formation of (.) OH and oxygen vacancies are active sites for (.) O2 (-) formation. The enhanced photocatalytic activity is ascribed to the synergistic effect of Bi nanocrystals and surface oxygen vacancies.

RhB-sensitized BiOCl hierarchical nanostructures were utilized for visible light MO degradation. The electrons transfer from RhB LUMO orbit to CB of BiOCl facilitates superoxide radical generation, resulting in improved MO degradation efficiency.

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