Palladium (Pd)-catalyzed cross-coupling reactions are among the most important methods in organic synthesis. We report discovery of highly efficient and green photocatalytic processes by which reactions, including Sonogashira, Stille, Hiyama, Ullmann, Buchwald–Hartwig can be driven with visible light at temperatures slightly above room temperature using alloy nanoparticles gold Pd on zirconium oxide, thus achieving high yields. The absorb light, their conduction electrons gain energy, is...

Selective oxidation of aliphatic alcohols under mild and base-free conditions is a challenging process for organic synthesis. Herein, we report one-pot the direct oxidative esterification that significantly enhanced by visible-light irradiation at ambient temperatures. The new methodology uses heterogenerous photocatalysts gold–palladium alloy nanoparticles on phosphate-modified hydrotalcite support molecular oxygen as benign oxidant. can absorb incident light, light-excited metal electrons...

Nanofibers of sodium vanadate, consisting very thin negatively charged layers and exchangeable ions between the layers, are efficient sorbents for removal radioactive 137Cs+ 85Sr2+ cations from water. The exchange or with interlayer Na+ eventually triggered structural deformation trapping in nanofibers. Furthermore, when nanofibers were dispersed a AgNO3 solution at pH >7, well-dispersed Ag2O nanocrystals formed by firmly anchoring themselves on fiber surfaces along planes crystallographic...

Abstract Titanate nanotubes (TNT) supported AgI nanoparticles were prepared by a two‐step method: the deposition of Ag 2 O on titanate from AgNO 3 solution and subsequent I‐adsorption process NaI solution. It is found that samples exhibited excellent photoactivity for selective oxidation benzylamine to corresponding imine under visible light illumination photocatalyst can be used many times without apparent activity loss. X‐ray diffraction studies, transmission electron microscopy, diffuse...

Hydrotalcite (HT)-based materials are usually applied to capture anionic pollutants in aqueous solutions. Generally considered anion exchangers, their ability radioactive cations is rarely exploited. In the present work, we explored of pristine and calcined HT getters effectively (Sr(2+) Ba(2+)) which can be securely stabilized at getter surface. It found that outperforms its counterpart cation removal ability. Meanwhile, a novel mechanism targeting I(-) demonstrated. This approach involves...

Self-assembly of nanoscale structures at liquid-solid interfaces occurs in a broad range industrial processes and is found various phenomena nature. Conventional theory assumes spherical particles homogeneous surfaces, but that model oversimplified, situ observations are needed for more complete understanding. Liquid-phase scanning transmission electron microscopy (LP-STEM) used to examine the interactions direct self-assembly superlattices formed by gold nanoparticles (AuNPs) nonpolar...

Melt electrowriting (MEW) is a promising additive manufacturing technique for tissue scaffold biofabrication. Successful application of MEW scaffolds requires strictly controlled mechanical behavior. This geometry be optimized to match native properties while simultaneously supporting cell attachment and proliferation. The objective this work investigate how geometric can exploited massively tailor the behavior tubular crosshatch scaffolds. An experimentally validated finite element (FE)...

Three-dimensional (3D) printing technologies are widely applied in various industries and research fields currently the subject of intensive investigation development. However, high-performance materials that suitable for 3D still short supply, which is a major limitation printing, particularly biomedical applications. The physicochemical properties single constituent may not be sufficient to meet needs modern biotechnology development production. To enhance materials' performance broaden...

We report on the mechanical properties of sodium titanate nanowires (Na₂Ti₃O₇ NW) through a combination bending experiments and theoretical analysis.

Monolayer hexagonal boron nitride (hBN) has recently become the focus of intense research as a material to host quantum emitters. Although it is well known that such emission associated with point defects, so far no conclusive correlation between spectra and specific defects been demonstrated. Here, we prepare atomically clean suspended hBN samples subject them low-energy ion irradiation. The are characterized before after irradiation via automated scanning transmission electron microscopy...

It is challenging but important to understand the mechanical properties of one-dimensional (1D) nanomaterials for their design and integration into nanodevices. Generally, brittle ceramic nanowires (NWs) cannot withstand a large bending strain. Herein, in situ deformation titanium dioxide (TiO2) NWs with bronze/anatase dual-phase was carried out inside transmission electron microscopy (TEM) system. An ultralarge strain up 20.3% observed on individual NWs. Through an atomic-scale study,...

Mechanical resonance of GaAs nanowires allows for measurement the effect stacking faults on Young's modulus and quality factor.

Self-assembled nanoparticles (NPs) in superlattices are close contact. Their dense packing and the proximity of aligned facets can facilitate coalescence enable crystal lattices to fuse at temperatures below bulk melting point. This phenomenon could be applied nanodevice manufacture. We study NP fusion liquid dry environments controlled using electron microscopy minimized doses. found that self-assembled gold NPs (AuNPs, diameter 8.1 ± 0.4 nm) depended on their arrangement. A double layer...

Under visible-light irradiation, gold nanoparticles (Au NPs) supported by titania (TiO2) nanofibers show excellent activity and high selectivity for both reductive coupling of nitroaromatics to corresponding azobenzene or azoxylbenzene selective oxidation aromatic alcohols aldehydes. The Au NPs act as active centers mainly due their localized surface plasmon resonance (LSPR) effect. They can effectively couple the photonic energy thermal enhance reaction efficiency. Visible-light irradiation...

Abstract Anatase TiO 2 nanocrystals were painted on H‐titanate nanofibers by using an aqueous solution of titanyl sulfate. The anatase bonded solidly onto the titanate fibers through formation coherent interfaces at which oxygen atoms shared and fiber. This approach allowed us to create large surfaces nanofibers, are active in photocatalytic reactions. method was also applied successfully coat fly ash layered clay. exhibited a much higher catalytic activity for degradation sulforhodamine B...

Construction of nanoarchitectures requires techniques like joint formation and trimming. For ceramic materials, however, it is extremely difficult to form nanojoints by conventional methods merging. In this work, we demonstrate that titanate nanowires (NWs) can be joined spot melting under electron beam (e-beam) irradiation (EBI). The fuses the contacted NWs yielding an intact nanojoint. Nanojoints with different morphologies produced. structures consist titanium dioxide (TiO2) rutile,...

In situ tensile tests show atypical defect motions in the brittle Na2Ti3O7 (NTO) nanowire (NW) within elastic deformation range. After fracture, recovery of NTO NW is followed by reversible motion defects a time-dependent manner. An cyclic loading–unloading test shows that these mobile shift back and forth along accordance with cycles eventually restore their initial positions after load completely removed. The existence NWs does not lead to plastic NW. speculated be result glidibility TiO6...

Layered sodium titanate nanowires exhibit ultra-large bending strain, which is accompanied by dislocation motion.