Preparation of two-dimensional indium selenide, other two-dimensional materials and related compositions via surfactant-free deoxygenated co-solvent systems.

The present invention relates to a material and process for producing water- and oxygen-free halogen salts of an alkali metal or alkaline earth metal, or of a transition metal, or of a metal of groups 13 or 14 of the Periodic Table, in which at least one halogen salt is heated with a heating rate of from 0.2 K/min to 30 K/min, especially from 1.0 K/min to 10 K/min, proceeding from room temperature.

The present invention relates to a material and process for producing water- and oxygen-free halogen salts of an alkali metal or alkaline earth metal, or of a transition metal, or of a metal of groups 13 or 14 of the Periodic Table, in which at least one halogen salt is heated with a heating rate of from 0.2 K/min to 30 K/min, especially from 1.0 K/min to 10 K/min, proceeding from room temperature.

A solid-electrolyte material includes Li, Y, O, and X. X is at least two elements selected from the group consisting of F, Cl, Br, and I.

A production method for producing a halide includes a heat-treatment step of heat-treating, in an inert gas atmosphere, a mixed material in which LiX and YZ.sub.3 are mixed, where X is an element selected from the group consisting of Cl, Br, and I, and Z is an element selected from the group consisting of Cl, Br, and I. In the heat-treatment step, the mixed material is heat-treated at higher than or equal to 200° C. and lower than or equal to 650° C.

A method of recovering bromide from bromine-containing smelting ash relates to the field of high efficient separation and recovery of bromine by total wet method. It especially relates to the method of high efficiency separation of bromine salt and lead, zinc recovery of circuit board smelting ash by two-step method. It mainly comprising: sub-molten salt leaching, washing, separate Lead and zinc by adjusting the pH of industrial sulfuric acid, membrane separation and concentration, reuse of water, crude bromine salt recovery by evaporation crystallization of bromine salt. Compared with the traditional baking and recycling process of ash, the invention adopts sodium hydroxide submolten salt leaching technology and membrane separation and concentration technology, to reduce the reaction temperature and tailings discharge greatly, which has a good effect of energy saving and emission reduction.

A halide producing method according to the present disclosure includes heat-treating a material mixture that is a material containing an MO.sub.x powder and an NH.sub.4X powder in an inert gas atmosphere or in a vacuum. M represents at least one element selected from the group consisting of rare-earth elements, X represents at least one element selected from the group consisting of F, Cl, Br, and I, x is greater than or equal to 1 and less than or equal to 2, and Requirement (a) or Requirement (b) below is satisfied,

D1?D2 and D2?D1?0.5?D2(a)

D2<D1 and D1?D2?0.5?D1(b)

where an average particle diameter of the MO.sub.x powder is denoted by D1, and an average particle diameter of the NH.sub.4X powder is denoted by D2.

A method of producing hydrogen includes subliming a metal salt comprising a metal and a halide to yield a gas phase metal salt comprising the metal and the halide, and contacting the gas phase metal salt with a gas phase hydrocarbon to yield the metal in elemental form, carbon in elemental form, hydrogen gas, and a hydrogen halide comprising the halide.

The present invention relates to a material and process for producing water- and oxygen-free halogen salts of an alkali metal or alkaline earth metal, or of a transition metal, or of a metal of groups 13 or 14 of the Periodic Table, in which at least one halogen salt is heated with a heating rate of from 0.2 K/min to 30 K/min, especially from 1.0 K/min to 10 K/min, proceeding from room temperature.

Provided are a porous metal halide film that reacts with an organic halide to be converted into an organometal halide having a perovskite structure, thereby fabricating the organometal halide, a fabrication method thereof, and a fabrication method of an organometal halide having a perovskite structure using the same, and specifically, the porous metal halide film according to the present disclosure satisfies Relational Expression 1 below:

I(101)/I(001)?0.5(Relational Expression 1) in Relational Expression 1, I(101) is a diffraction intensity of a (101) plane in X-ray diffraction pattern using a Cu K? line of the porous metal halide film, and I(001) is a diffraction intensity of the (001) plane in the same X-ray diffraction pattern.