A composite nanomaterial of ZnO impregnated by, e.g., a green copper phthalocyanine compound (CuPc) can be an efficient solar light photocatalyst for water remediation. The composite may include hollow shell microspheres and hollow nanospheres of CuPc-ZnO. CuPc may function as a templating and/or structure modifying agent, e.g., for forming hollow microspheres and/or nanospheres of ZnO particles. The composite can photocatalyze the degradation of organic pollutants such as crystal violet (CV) and 2,4-dichlorophenoxyacetic acid as well as microbes in water under solar light irradiation. The ZnO—CuPc composite can be stable and recyclable under solar irradiation.

Porous metal oxide microspheres are prepared via a process comprising forming a liquid dispersion of polymer nanoparticles and a metal oxide; forming liquid droplets of the dispersion; drying the droplets to provide polymer template microspheres comprising polymer nanospheres; and removing the polymer nanospheres from the template microspheres to provide the porous metal oxide microspheres. The porous microspheres exhibit saturated colors and are suitable as colorants for a variety of end-uses.

Synthesizing Janus nanoparticles including forming a lamellar phase having water layers, organic layers, and a surfactant, and reacting chemical precursors in the lamellar phase to form the Janus nanoparticles at interfaces of the water layers with the organic layers.

A positive active material precursor for a rechargeable lithium battery, a method for preparing a positive active material using the same, and a positive active material for a rechargeable lithium battery are provided. The positive active material precursor for a rechargeable lithium battery has a form of a core-shell particle including a core and a shell around the core, where the core includes a nickel-manganese-based composite hydroxide containing nickel and manganese, the shell includes a nickel-manganese-based composite hydroxide containing nickel, manganese, and a pillar element, and the pillar element includes at least one selected from Al, Mo, Ti, W, and Zr.

Porous metal oxide microspheres are prepared via a process comprising forming a liquid solution or dispersion of polydisperse polymer nanoparticles and a metal oxide; forming liquid droplets from the solution or dispersion; drying the liquid droplets to provide polymer template microspheres comprising polymer nanospheres and metal oxide; and removing the polymer nanospheres from the template microspheres to provide the porous metal oxide microspheres. The porous microspheres exhibit saturated colors and are suitable as colorants for a variety of end-uses.

Disclosed are an aluminum-coated precursor and a preparation method therefor. The aluminum coated precursor has a chemical formula of xMCO.sub.3(1-x).Al(OH).sub.3, wherein M is at least one of nickel, cobalt and manganese, and x is 0.995-0.999. The aluminum-coated precursor has the advantages of a controllable particle size and uniform particle size distribution, a high degree of sphericity, a smooth particle surface, a high tap density, not easily breaking, and an excellent electrochemical performance and energy density.

A quantum dot organic light-emitting diode according to an embodiment of the present disclosure may include a blue organic light-emitting diode (OLED) layer, a quantum dot color conversion layer which is provided on the blue OLED layer and has different scattering particle structures according to R, G and B colors, a color filter layer which is provided on the quantum dot color conversion layer and filters color other than the color that the color filter layer passes from the colors emitted by the quantum dot color conversion layer, and a coating layer provided on the color filter layer.

A preparation method for a high nickel ternary precursor capable of preferential growth of crystal planes by adjusting and controlling the addition amount of seed crystals. The method comprises the following steps: 1) feeding a ternary metal solution into a reaction kettle containing a first base liquid for reaction, and when the particle size reaches 1.5 to 3.0 μm, stopping the feeding, so as to obtain a seed crystal slurry; 2) simultaneously adding the ternary metal solution, a liquid alkali solution, and an ammonia solution in cocurrent flow into a growth kettle containing a second base solution for reaction, when the particle size reaches 6 to 8 μm, adding the seed crystal slurry into the reaction system, and controlling the particle size to be 9.0 to 11.0 μm by adjusting the feed rate of the seed crystal, so as to obtain the target object. In the preparation method, by adding seed crystals continuously, the crystal plane parameters of 001 peak in the prepared ternary precursor material is lower than the crystal plane parameters of 101 peak, facilitating the embedding of Li ions, and effectively improving the performance of a battery prepared by using the material.

Copper sulfide of the formula Cu.sub.xS.sub.y, wherein x and y are integer or non-integer values, wherein (i) the copper sulfide has a sulfur 2p XPS spectrum with peaks at 162.3 eV (±1 ev), 163.8 eV (±1 ev) and 68.5 eV (±1 ev), characterised in that the peak at 168.5 eV has a lower value of counts per second (CPS) than both the peak at 162.3 eV and the peak at 163.8 eV; and (ii) the copper sulfide has a copper 2p XPS spectrum with peaks at 932.0 eV (±2 ev) and 933.6 eV (±3 eV) and characterised in that the XPS spectrum does not comprise identifiable satellite peaks at 939.8 eV and 943.1 eV (±3 eV).

A filler for resinous composition is contained and used in resinous composition, and includes: a crystalline siliceous particulate material with a crystal structure made of at least one member selected from the group consisting of type FAU, type FER, type LTA and type MFI, and/or type MWW; and a surface treatment agent including an organic silica compound reacted with or adhered to a surface of the crystalline siliceous particulate material; the filler including the surface treatment agent in an amount falling in a range allowing the filler to exhibit a negative thermal expansion coefficient.