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.

A negative electrode material for a secondary battery including: a matrix including silicon (Si), one or more doping elements (D) selected from the group consisting of alkali metals, alkaline earth metals, and post transition metals, and oxygen (O), based on an element component; and silicon nanoparticles dispersed and embedded in the matrix, wherein the negative electrode material has composition uniformity, and a ratio (A1/A2) between an area of a first peak (A1) and an area of a second peak (A2) satisfying 0.8 to 6, a diffraction angle 2θ being positioned in a range of 10° to 27.4° in the first peak and being positioned in a range of 28±0.5° in the second peak, in an X-ray diffraction pattern using a CuKα ray.

The present application provides a method for preparing a zinc oxide nanoparticle structure synthesized using a microfluidic device and a self-assembled porous three-dimensional zinc oxide nanoparticle structure prepared therefrom. The self-assembled porous three-dimensional zinc oxide nanoparticle structure of the present application is a three-dimensional structure in which micropores, mesopores and macropores are created, and has excellent reactivity.

A carbon nanotube-resin composite includes: a carbon nanotube assembled wire including a plurality of carbon nanotubes; and a resin, wherein in the carbon nanotube assembled wire, the carbon nanotubes are oriented at a degree of orientation of 0.9 or more and 1 or less.

Provided is a polycrystalline SiC molded body wherein the resistivity is not more than 0.050 Ωcm and, when the peak strength in a wave number range of 760-780 cm.sup.−1 in a Raman spectrum is regarded as “A” and the peak strength in a wave number range of 790-800 cm.sup.−1 in the Raman spectrum is regarded as “B”, then the peak ratio (A/B) is not more than 0.100.

Provided are graphene nanosheets having a polyaromatic hydrocarbon concentration of less than about 0.7% by weight and a tap density of less than about 0.08 g/cm.sup.3, as measured by ASTM B527-15 standard. The graphene nanosheets also have a specific surface area (B.E.T) greater than about 250 m.sup.2/g. Also provided are processes for producing graphene nanosheets as well as for removing polyaromatic hydrocarbons from graphene nanosheets, comprising heating said graphene nanosheets under oxidative atmosphere, at a temperature of at least about 200° C.

Vanadium oxide nanomaterials dispersed in a polymeric matrix, substrates including the vanadium oxide nanomaterials dispersed in a polymeric matrix, and related methods of making vanadium oxide nanomaterials dispersed in a polymeric matrix are described.

The present invention provides the compound LiMn.sub.2--x-yNa.sub.xM.sub.yO.sub.4/Na.sub.1-zMnLi.sub.zM.sub.tO.sub.2/Na.sub.2CO.sub.3, to be used as a positive electrode for rechargeable lithium ion battery, where M is a metal or metalloid, 0.0≤x≤0.5; 0.0≤y≤0.5; 0.1≤z≤0.5; 0.0≤t≤0.3; as well as the method for producing it. The synthesis process includes disolving or mixing the precursor metals and then calcining them in air or controlled atmosphere in a temperature range between 250° C. and 1000° C., and for a time range of 0.5 h to 72 h to obtain the composite proposed with the interaction of its three present phases, presenting a high retention capacity during repeated loading/unloading cycles and excellent discharge capacity both at room temperature and up to 55° C.

The present application relates to a cathode material and an electrochemical device comprising the same. In particular, the present application relates to a cathode material having a surface heterophasic structure, wherein the cathode material includes a lithium cobalt oxide and an oxide of cobalt, wherein a Raman spectrum of the cathode material has characteristic peaks in the range of about 470 cm.sup.−1 to about 530 cm.sup.−1, about 560 cm.sup.−1 to about 630 cm.sup.−1 and about 650 cm.sup.−1 to about 750 cm.sup.−1, and wherein the surface heterophasic structure of the cathode material includes the lithium cobalt oxide and the oxide of cobalt. The electrochemical device using the cathode material having a surface heterophasic structure of the present application can exhibit excellent cycle performance and thermal stability.

Disclosed herein are modified zeolites and methods for making modified zeolites. In one or more embodiments disclosed herein, a zeolite may include a microporous framework comprising a plurality of micropores having diameters of less than or equal to 2 nm. The microporous framework may include at least silicon atoms and oxygen atoms. The modified zeolite may further include organometallic moieties each bonded to bridging oxygen atoms. The organometallic moieties may include a zirconium atom. The zirconium atom may be bonded to a bridging oxygen atom, and the bridging oxygen atom may bridge the zirconium atom of the organometallic moiety and a silicon atom of the microporous framework.