Soft-in-Rigid Strategy Promoting Rapid and High-Capacity Lithium Storage by Chemical Scissoring.

Large and rapid lithium storage is hugely demanded for high-energy/power lithium-ion batteries; however, it is difficult to achieve these two indicators simultaneously. Sn-based materials with a (de)alloying mechanism show low working potential and high theoretical capacity, but the huge volume expansion and particle agglomeration of Sn restrict cyclic stability and rate capability. Herein, a soft-in-rigid concept was proposed and achieved by chemical scissoring where a soft Sn-S bond was chosen as chemical tailor to break the Ti-S bond to obtain a loose stacking structure of 1D chain-like SnTiS.

Accelerating ion/electron transport by engineering an indium-based heterostructure toward large and reversible lithium storage.

The high activity of the InO/InS heterostructure can be activated into homogeneous InOS nanodots, thereupon stabilizing the subsequent cycles. The InO/InS can offer a high capacity of 1140 mA h g at 0.1 A g after 290 cycles, and even at 1 A g, it harvests a reversible capacity of 900 mA h g after 600 cycles.

Improving the alkali metal electrode/inorganic solid electrolyte contact via room-temperature ultrasound solid welding.

The combination of alkali metal electrodes and solid-state electrolytes is considered a promising strategy to develop high-energy rechargeable batteries. However, the practical applications of these two components are hindered by the large interfacial resistance and growth of detrimental alkali metal depositions (e.g.

Response to comment on "Tunable thermal quenching properties of NaSc(PO):Eu phosphors tailored by phase transformation details" by Z. Liu , , 2020, , 3615.

Yan argues that our reported abnormal negative thermal quenching (TQ) of the Na3Sc2(PO4)3:Eu2+ phosphor was a pitfall caused by the diminishment in optical path lengths of the spectrofluorometer originating from the increasing volume of the phosphor at elevated temperatures. We disagree with this suggestion and affirm that the negative TQ was an intrinsic property of Na3Sc2(PO4)3:Eu2+ phosphor associated with the phase transformation during heating.

Tunable thermal quenching properties of NaSc(PO):Eu phosphors tailored by phase transformation details.

Luminescence thermal quenching of phosphors is one of the prominent problems in restricting their application in high-power LED devices. In the current work, tunable luminescence thermal quenching behaviors, including abnormal negative thermal quenching and normal thermal quenching, were demonstrated for Na3Sc2(PO4)3:Eu2+ phosphors tailored by phase transformation details. A series of ionic substitution schemes were employed to synthesize α-, β- and γ-Na3Sc2(PO4)3:Eu2+ phosphors, which show discrepant phase transformations during heating.

Pyrolysis Mechanism of Ionic Liquid Under Microwave Irradiation and the Formation of N-Doped Carbon.

The pyrolysis mechanism of the ionic liquid [BMIm]N(CN)2 under microwave irradiation was discussed for the first time. The trimerization of the anion N(CN)-2 and the formation of a framework were firstly caused by the microwave irradiation. And then the carbonization of the framework occurred when the temperature reached 330 °C.

Nitrogen-Deficient Graphitic Carbon Nitride with Enhanced Performance for Lithium Ion Battery Anodes.

Graphitic carbon nitride (g-CN) behaving as a layered feature with graphite was indexed as a high-content nitrogen-doping carbon material, attracting increasing attention for application in energy storage devices. However, poor conductivity and resulting serious irreversible capacity loss were pronounced for g-CN material due to its high nitrogen content. In this work, magnesiothermic denitriding technology is demonstrated to reduce the nitrogen content of g-CN (especially graphitic nitrogen) for enhanced lithium storage properties as lithium ion battery anodes.

Novel g-CN/CoO Nanocomposites with Significantly Enhanced Visible-Light Photocatalytic Activity for H Evolution.

Novel g-CN/CoO nanocomposite application for photocatalytic H evolution were designed and fabricated for the first time in this work. The structure and morphology of g-CN/CoO were investigated by a wide range of characterization methods. The obtained g-CN/CoO composites exhibited more-efficient utilization of solar energy than pure g-CN did, resulting in higher photocatalytic activity for H evolution.

Insights into the discrepant luminescence for BaSiO :Eu phosphors prepared by solid-state reaction and precipitation reaction methods.

Two synthesis routes, solid-state reaction and precipitation reaction, were employed to prepare BaSiO :Eu phosphors in this study. Discrepancies in the luminescence green emission at 505 nm for the solid-state reaction method sample and in the yellow emission at 570 nm for the sample prepared by the precipitation reaction method, were observed respectively. A detail investigation about the discrepant luminescence of BaSiO :Eu phosphors was performed by evaluation of X-ray diffraction (XRD), photoluminescence (PL)/photoluminescence excitation (PLE), decay time and thermal quenching properties.

Red/blue-shift dual-directional regulation of α-(Ca, Sr)2SiO4:Eu(2+) phosphors resulting from the incorporation content of Eu(2+)/Sr(2+) ions.

In this work, tunable emission from green to red and the inverse tuning from red to green in α-(Ca, Sr)2SiO4:Eu(2+) phosphors were demonstrated magically by varying the incorporation content of Eu(2+) and Sr(2+) ions, respectively. The tunable emission properties and the tuning mechanism of red-shift resulting from the Eu(2+) content as well as that of blue-shift induced by the Sr(2+) content were investigated in detail. As a result of fine-controlling the incorporation content of Eu(2+), the emission peak red-shifts from 541 nm to 640 nm.

Two-beam interferometer with optical path difference magnified.

A two-beam interferometer is proposed and experimentally demonstrated with OPD magnified. Two cascaded fiber ring resonators with almost the same fiber length are spliced into a fiber loop. An acousto-optic modulator is employed to generate optical pulses and to choose the pulses traveling around one of the resonators for x trips.

Human leukocyte antigen-C and killer cell immunoglobulin-like receptor gene polymorphisms among patients with syphilis in a Chinese Han population.

Syphilis is a sexually transmitted infection caused by the Treponema pallidum subspecies pallidum spirochete bacterium. The killer cell immunoglobulin-like receptors (KIR), interacting with human leukocyte antigens (HLA), regulate the activations of natural killer (NK) cells and certain T-cell subsets in response to microbe infection. The objective of this study was to explore whether KIR and HLA-C gene polymorphisms were associated with syphilis in a Chinese Han population.

Color tuning of direct white light of lanthanum aluminate with mixed-valence europium.

The generation of direct white-light emission of the coexisting valence-varied europium-lanthanum aluminate through substitution of cations into the host and its resultant adjustment of the energy transfer have been presented. With respect to La(0.99-x)Sr(x)AlO(3-delta):Eu(0.

[Fluorescence studies of Eu ions adsorption on pseudo-boehmite colloidal particle surface].

Stable pseudo-boehmite sol was obtained by adding HNO3 as peptizing agent and adjusting pH to be 2.0. TEM result shows that the AlOOH colloidal particle size is about 60 nm.

Tunable single-doped single-host full-color-emitting LaAlO(3):Eu phosphor via valence state-controlled means.

A full-color-emitting phosphor of valence-varied Eu doped perovskite-type LaAlO(3) with the aid of energy transfer is demonstrated and its luminescence properties can be tuned through controllable addition of doped ions.

Fabrication of Densely Packed AlN Nanowires by a Chemical Conversion of Al(2)O(3) Nanowires Based on Porous Anodic Alumina Film.

Porous alumina film on aluminum with gel-like pore wall was prepared by a two-step anodization of aluminum, and the corresponding gel-like porous film was etched in diluted NaOH solution to produce alumina nanowires in the form of densely packed alignment. The resultant alumina nanowires were reacted with NH(3) and evaporated aluminum at an elevated temperature to be converted into densely packed aluminum nitride (AlN) nanowires. The AlN nanowires have a diameter of 15-20 nm larger than that of the alumina nanowires due to the supplement of the additional evaporated aluminum.

[Clinical study of juvenile nasopharyngeal angiofibroma].

Objective: To present our experiences of diagnosis and treatment for juvenile nasopharyngeal angiofibroma (JNA) and to evaluate the factors influencing intra-operative bleeding and tumor recurrence.

Method: Forty-five patients suffered form JNA experienced surgical management and/or radiotherapy between January 1980 and December 2001 were studied retrospectively. All the patients were males.