The disclosure discloses a method for high-value application of PTA residue high-concentration bromine-containing wastewater to preparation of cuprous bromide, belongs to the field of PTA residue treatment, and includes: firstly adjusting a pH value of the bromine-containing wastewater to 0.5-2, adding cuprous oxide in batches, taking a reaction for 3-20 min after the cuprous oxide is totally added to produce cuprous bromide, Solid liquid separation to obtain cuprous bromide, concentrating a liquid phase to recover inorganic salt while rest wastewater may be used as process water for application. By cuprous oxide addition and method regulation and control, a bromine removal rate is as high as 95% or higher, the cuprous bromide reaches yield of 90% or higher and purity of 95%. Meanwhile, sodium sulfate with the purity of 90% or higher may be obtained. High-value application of the PTA residue high-concentration bromine-containing wastewater is really realized.

The disclosure discloses a method for high-value application of PTA residue high-concentration bromine-containing wastewater to preparation of cuprous bromide, belongs to the field of PTA residue treatment, and includes: firstly adjusting a pH value of the bromine-containing wastewater to 0.5-2, adding cuprous oxide in batches, taking a reaction for 3-20 min after the cuprous oxide is totally added to produce cuprous bromide, Solid liquid separation to obtain cuprous bromide, concentrating a liquid phase to recover inorganic salt while rest wastewater may be used as process water for application. By cuprous oxide addition and method regulation and control, a bromine removal rate is as high as 95% or higher, the cuprous bromide reaches yield of 90% or higher and purity of 95%. Meanwhile, sodium sulfate with the purity of 90% or higher may be obtained. High-value application of the PTA residue high-concentration bromine-containing wastewater is really realized.

This disclosure presents methods for vapor deposition of metal halides involving exposure of substrates to vapors of organometallic copper complexes with halosilane vapors. The methods described herein are advantageous for the production of transparent hole conducting layers, e.g., for perovskite solar cells.

This disclosure presents methods for vapor deposition of metal halides involving exposure of substrates to vapors of organometallic copper complexes with halosilane vapors. The methods described herein are advantageous for the production of transparent hole conducting layers, e.g., for perovskite solar cells.

Compositions suitable for reversibly storing heat in thermal energy systems (TES) include a salt hydrate represented by the formula: MX.sub.q.nH.sub.2O. M is a cation selected from Groups 1 to 14 of the IUPAC Periodic Table, X is a halide of Group 17, q ranges from 1 to 4, and n ranges from 1 to 12. The cation (M) may have an electronegativity of ≤ about 1.8 and a molar mass ≤ about 28 g/mol. The anion (X) may have an electronegativity of ≥ about 2.9 to ≤ about 3.2. A distance between a cation (M) and coordinating water molecules (H.sub.2O) is ≤ about 2.1 Å. Thermal energy systems (TES) incorporating such compositions are also provided that are configured to reversibly store heat in the thermal energy system (TES) via an endothermic dehydration reaction and to release heat in in the thermal energy system (TES) via an exothermic hydration reaction.

Compositions suitable for reversibly storing heat in thermal energy systems (TES) include a salt hydrate represented by the formula: MX.sub.q.nH.sub.2O. M is a cation selected from Groups 1 to 14 of the IUPAC Periodic Table, X is a halide of Group 17, q ranges from 1 to 4, and n ranges from 1 to 12. The cation (M) may have an electronegativity of ≤ about 1.8 and a molar mass ≤ about 28 g/mol. The anion (X) may have an electronegativity of ≥ about 2.9 to ≤ about 3.2. A distance between a cation (M) and coordinating water molecules (H.sub.2O) is ≤ about 2.1 Å. Thermal energy systems (TES) incorporating such compositions are also provided that are configured to reversibly store heat in the thermal energy system (TES) via an endothermic dehydration reaction and to release heat in in the thermal energy system (TES) via an exothermic hydration reaction.

A main object of the present disclosure is to provide a cathode active material used for a fluoride ion battery, the cathode active material comprising: a first active material having a composition represented by Pb.sub.2−xCu.sub.1+xF.sub.6, wherein 0≤x<2; and a second active material containing a Bi element and a F element.

A main object of the present disclosure is to provide a cathode active material used for a fluoride ion battery, the cathode active material comprising: a first active material having a composition represented by Pb.sub.2−xCu.sub.1+xF.sub.6, wherein 0≤x<2; and a second active material containing a Bi element and a F element.

A gas sensor device has a crystalline film of copper(I) bromide, wherein a crystal surface of the copper(I) bromide is formed of a stepped terrace having a flat face and a steep slope.

A gas sensor device has a crystalline film of copper(I) bromide, wherein a crystal surface of the copper(I) bromide is formed of a stepped terrace having a flat face and a steep slope.