Photocatalytic reduction of CO2 is considered as a kind promising technologies for solving the greenhouse effect. Herein, novel hybrid structure g-C3N4/ZnO/Ti3C2 photocatalysts was designed and fabricated to investigate their abilities reduction. As demonstration, heterojunction g-C3N4/ZnO can improve photogenerated carriers’ separation, addition Ti3C2 fragments further facilitate photocatalytic performance from CO. Hence, has efficiently increased CO production by 8 12 times than pristine...

Though the coordination environment of single metal sites has been recognized to be great importance in promoting catalysis, influence simultaneous precise modulation primary and secondary spheres on catalysis remains largely unknown. Herein, a series Ni(II) with altered have installed onto metal–organic frameworks (MOFs) UiO-67 skeleton, affording UiO–Ni–X–Y (X = S, O; Y H, Cl, CF3) X spheres, respectively. Upon deposition CdS nanoparticles, resulting composites present high photocatalytic...

Inspired by enzymatic catalysis, it is crucial to construct hydrogen-bonding-rich microenvironment around catalytic sites; unfortunately, its precise construction and understanding how the distance between such sites affects catalysis remain significantly challenging. In this work, a series of metal-organic framework (MOF)-based single-atom Ru

The selectivity control of Pd nanoparticles (NPs) in the direct CO esterification with methyl nitrite toward dimethyl oxalate (DMO) or carbonate (DMC) remains a grand challenge. Herein, NPs are incorporated into isoreticular metal-organic frameworks (MOFs), namely UiO-66-X (X=-H, -NO2 , -NH2 ), affording Pd@UiO-66-X, which unexpectedly exhibit high (up to 99 %) DMC and regulated activity esterification. In sharp contrast, supported on MOF, yielding Pd/UiO-66, displays (89 DMO as always...

Abstract The selectivity control of Pd nanoparticles (NPs) in the direct CO esterification with methyl nitrite toward dimethyl oxalate (DMO) or carbonate (DMC) remains a grand challenge. Herein, NPs are incorporated into isoreticular metal–organic frameworks (MOFs), namely UiO‐66‐X (X=‐H, ‐NO 2 , ‐NH ), affording Pd@UiO‐66‐X, which unexpectedly exhibit high (up to 99 %) DMC and regulated activity esterification. In sharp contrast, supported on MOF, yielding Pd/UiO‐66, displays (89 DMO as...

Modern technological pressure for property-directing structural design of Fe/oxide core–shell nanoparticles (NPs) requires the basic understanding formation mechanisms and ability to effectively tune structures. In this work, in-depth transmission electron microscopy characterization reveals an Fe/Fe3O4 structure when iron NPs were oxidized at room temperature. More importantly, we present first atomically resolved dynamical images showing redox reactions in high temperature (400–600 °C)....

The first triple-layered borate with edge-sharing BO4 tetrahedra, β-CsB9 O14 was obtained under vacuum-sealed condition. It represents a new structure type and enriches the structural diversity of borates. Moreover, exhibits short UV cutoff edge large birefringence, indicating that it could be regarded as DUV birefringent crystal.

Abstract Despite coordination environment of catalytic metal sites has been recognized to be great importance in single‐atom catalysts (SACs), a significant challenge remains the understanding how location‐specific microenvironment higher sphere influences their catalysis. Herein, series Cu‐based SACs, namely Cu 1 /UiO‐66‐X (X=‐NO 2 , ‐H, and ‐NH ), are successfully constructed by anchoring single atoms onto Zr‐oxo clusters metal–organic frameworks (MOFs), i.e., UiO‐66‐X. The ‐X functional...

Abstract Despite coordination environment of catalytic metal sites has been recognized to be great importance in single‐atom catalysts (SACs), a significant challenge remains the understanding how location‐specific microenvironment higher sphere influences their catalysis. Herein, series Cu‐based SACs, namely Cu 1 /UiO‐66‐X (X=‐NO 2 , ‐H, and ‐NH ), are successfully constructed by anchoring single atoms onto Zr‐oxo clusters metal–organic frameworks (MOFs), i.e., UiO‐66‐X. The ‐X functional...

Unraveling the phase selection mechanisms of semiconductor nanowires (NWs) is critical for applications in future advanced nanodevices. In this study, atomistic vapor–solid–liquid growth processes Sn-catalyzed wurtzite (WZ) and zinc blende (ZB) ZnO are directly revealed based on situ transmission electron microscopy. The kinetics WZ ZB crystal phases appear markedly different terms NW–droplet interface, whereas nucleation site as determined by contact angle ϕ between seed particle NW found...

Abstract Surface coating strategy has been proved essential for mitigating the large volume change in electrodes lithium‐ion batteries (LIBs) and sodium‐ion (SIBs), thus improving cyclability working efficiency of batteries. However, mechanical instability electrode generated by incorporating heterostructure interface between core materials remains largely unexplored. Here, effects carbon gold coatings on nanomechanical properties CuO nanowires (NWs) are investigated based situ experiments...

Depending on the nucleation sites, two types of SnO₂nanostructures were fabricated: falciform single-crystal SnO₂nanowires (growth direction from [1̄01] to [001]) and tri-crystal SnO₂nanobelts containing (301) (1̄01) twins.

The optimization of nanopore-based devices is closely related to the nanopore three-dimensional (3D) structures. In this paper, faceted nanopores were fabricated in magnesium (Mg) by aligning electron beam (e-beam) along [0001] direction. Detailed structural characterization transmission microscopy reveals existence two 3D structures: hexagonal prism-shaped and hourglass-shaped morphologies. Moreover, structures are also found depend on widest diameter-to-thickness ratio (D/t). A plausible...

A Ku-band broadband waveguide wide side longitudinal slot antenna array for unmanned aerial vehicle (UAV) SAR application is designed. single-ridge employed to reduce the sectional size of waveguide, and achieve scanning ability. The bandwidth expanded by subarea feeding slots. active admittance extracted based on simulation using HFSS software, in order determine parameters mode built slots are modified optimized aperture distribution re-deducing method. This design method has high...

Correlating the microscopic structural characteristics with macroscopic electrochemical performance in electrode materials is critical for developing excellent-performance lithium-ion batteries, which however remains largely unexplored. Here, we show that Zn2SnO4 (ZTO) nanowires (NWs) smaller diameters (d < 5 nm) exhibit slower capacity fade rate and better cycling stability, as compared NWs larger ranging from tens to hundreds of nanometers. By applying situ transmission electron microscopy...

The mechanical behavior of the fine-grained piezoelectric/substrate structure with multiple interface cracks under electromechanical impact loading is investigated. Using Laplace and Fourier integral transforms, double-coupled singular equations single-valued conditions problems are formulated. Both equation simplified into an algebraic through Chebyshev point placement method solved by numerical calculation. Then, expression dynamic energy release rate given help intensity factors electric...