Ultra-stable perovskite quantum dot composites encapsulated with mesoporous SiO and PbBr(OH) for white light-emitting diodes.

Lead halide perovskite quantum dots (QDs) with high fluorescence efficiency and high color purity have a broad application prospect in the field of backlight display, but poor stability has been a key factor limiting their commercialization. Herein, we successfully synthesized CsPbBr QDs-KIT-6 (CsPbBr -K6) composite by using KIT-6 molecular sieve as the limited template with a simple high temperature solid-phase method. Further, the semi-protected CsPbBr QDs in KIT-6 frame will spontaneously hydrolyze when encountering water, and finally the double-encapsulated CsPbBr QDs-KIT-6@PbBr(OH) (CsPbBr -K6@PbBr(OH)) composite are obtained.

One-Step Hydrothermal Synthesis of MoO/MoS Nanocomposites as High-Performance Electrode Material for Supercapacitors.

By only changing the ratio of Mo to S source, a distinctive single phase MoO or MoS and MoO/MoS nanocomposites (NCs) are obtained through a simple one-step hydrothermal method based on CHNS as a sulfur source and (NH)MoO·4HO as a source of Mo in oxalic acid. The effect of ratio of Mo to S source on the composition, structure, and electrochemical performance are systematically researched. Due to its unique design, abundant macropores active sites in MoO/MoS NCs induce superior rate property (55.

In-air self-reduction synthesis and luminescence properties from Mg Ca Na (PO ) :Eu -Eu excited using ultraviolet light.

A series of Mg Ca Na (PO ) :Eu -Eu phosphors was successfully synthesized using a high-temperature solid-state method in an air atmosphere. The phase structures and luminescence properties of the samples were studied in detail. The phosphors exhibited strong visible light emission under different wavelengths of ultraviolet light excitation.

Yttrium vanadates based ratiometric fluorescence probe for alkaline phosphatase activity sensing.

Alkaline phosphatase (ALP) is an important biomarker for diagnosis, and the abnormal level of serum ALP is closely related to a variety of diseases. In present work, a ratiometric fluorescence probe based on hybrid nanoparticles CDs@YVO: Dy nanoparticle is introduced for alkaline phosphatase (ALP) activity determination. The CDs@YVO: Dy probe is constructed by the carbon dots (CDs) and YVO: Dy through a simple mixing method, in which the blue emission of CDs at 405 nm acts as the calibrated signal, the green emission of YVO: Dy at 574 nm decreased with the increasing targets ALP, and used as the output signal.