Abstract: A light-emitting element includes a pair of electrodes, a first light-emitting unit, a second light-emitting unit, and a charge generation layer. The first light-emitting unit, between the pair of electrodes, and the first light-emitting unit, includes a first light-emitting layer. The second light-emitting unit, between the pair of electrodes, includes a second light-emitting layer. A first luminescent layer includes a first main body material, a second main body material, a first guest material, and a first auxiliary material, and the first main body material forms a first excimer complex with the second main body material. A first excited triplet state energy level of the first auxiliary material is lower than a first excited triplet state energy level of the first excimer complex, and the first excited triplet state energy level of the first auxiliary material is higher than that of the first guest material.

Abstract: A metal-organic framework (MOF) MIL-125 and a preparation method and a use thereof are provided. The MOF MIL-125 is a round cake-like crystal and has an external specific surface area (SSA) of 160 m2/g to 220 m2/g. The MOF MIL-125 provided in the present application has a large number of microporous structures, a large external SSA, and a high catalytic activity in oxidation.

Abstract: An adsorbent and a use thereof are provided. The adsorbent is a metal-organic framework (MOF) MIL-125; the MOF MIL-125 has an external specific surface area (SSA) of 160 m2/g to 220 m2/g; and the MOF MIL-125 includes a micropore with an area of 1,000 m2/g to 1,500 m2/g. The external SSA of the MOF MIL-125 is much higher than an external SSA of the traditional MIL-125, which has promising application prospects in the adsorptive separation of xylene isomers and exhibits high selectivity for p-xylene.

Abstract: A preparation method of a porous oxide is provided, which includes: preparing the porous oxide with a polyester polyol as a raw material. The porous oxide prepared by the preparation method in the present application has characteristics such as uniform and adjustable pore sizes and controllable distribution of mesopores, micropores, and macropores.

Abstract: A catalyst for pyrolysis of 1,2-dichloroethane (1,2-DCE) to prepare vinyl chloride monomer (VCM), a preparation method, a use, and a regeneration method thereof are provided. The catalyst for pyrolysis of 1,2-DCE to prepare VCM includes a silicon-aluminum molecular sieve. The catalyst for pyrolysis of 1,2-DCE to prepare VCM has high reaction activity and excellent selectivity and solves the problem that the pyrolysis of 1,2-DCE to prepare VCM in the prior art involves high reaction temperature and large energy consumption and is prone to coking and carbon deposition.

Abstract: The present application discloses a method for preparing a hierarchical porous TS-1 molecular sieve, which uses a silicon-titanium ester polymer as both titanium source and silicon source. In the method, silicon and titanium are uniformly connected to a same polymer, and the hydrolysis rates thereof are equivalent during hydrolysis, which can prevent TiO2 precipitation and reduce the generation of non-framework titanium. Further, the silicon-titanium ester polymer is not only used as both silicon source and titanium source, but also can be used as mesoporous template in the synthesis process. The obtained TS-1 molecular sieve has mesoporous structure with narrow pore size distribution, which plays an important role in promoting the application of TS-1 molecular sieve in the field of catalysis.

Abstract: This application discloses a polymer ultraviolet absorbent and preparation method and application thereof. The synthesis process of the polymer ultraviolet absorbent does not require additional organic solvents, and the reaction by-product is high-purity ethanol, which is relatively economical. green, efficient and environmentally friendly. The polymer ultraviolet absorbent has good water solubility, is convenient to use, safe and non-toxic, and has excellent ultraviolet absorption effect.

Abstract: The present application discloses a method for preparing polyester polyol comprising performing transesterification of raw materials containing inorganic oxyacid ester and polyhydric alcohol to obtain the polyester polyol. The polyester polyol obtained by the method described in the present application has higher heat resistance.

Abstract: The present application discloses a method for preparing hierarchical porous titanium-silicon TS-1 molecular sieve, wherein a titanate polyester polyol is used as titanium source. In the method, titanium is connected to a polymer, which makes titanium more difficult to hydrolyze, prevent the TiO2 precipitation and reduce the formation of non-framework titanium. In addition that such new type of the titanate polyester polyol acts as the titanium source during the synthesis process, the titanate polyester polyol can also be used as mesoporous template. Therefore, the TS-1 molecular sieve obtained by this method has mesoporous structure, which plays an important role in promoting the application of TS-1 molecular sieve in the field of catalysis.

Abstract: The present application discloses a method for preparing a hierarchical porous TS-1 molecular sieve comprising using a silicon-titanium ester polymer as both titanium source and silicon source. In the method, silicon and titanium are uniformly connected to a same polymer, and the hydrolysis rates thereof are equivalent during hydrolysis, which can prevent TiO2 precipitation and reduce the generation of non-framework titanium. Further, the silicon-titanium ester polymer is not only used as both silicon source and titanium source, but also can be used as a mesoporous template in the synthesis process. The obtained TS-1 molecular sieve has mesoporous structure with narrow pore size distribution.

Abstract: Provided is a method for preparing a Y type molecular sieve having a high silica-to-alumina ratio, comprising: mixing deionized water, a silicon source, an aluminum source, an alkali source, and a tetraalkylammoniumcation source as a template agent to obtain an initial gel mixture; after aging the initial gel mixture at an appropriate temperature, feeding the gel mixture into a high pressure synthesis kettle for crystallization; separating a solid product, and drying to obtain the Y type molecular sieve having a high silica-to-alumina ratio. The method provides a phase-pure Y type molecular sieve having a high crystallinity, the SiO2/Al2O3 thereof being not less than 6.

Abstract: Provided is a method for preparing a Y type molecular sieve having a high silica-to-alumina ratio, comprising: mixing deionized water, a silicon source, an aluminum source, an alkali source, and a tetraalkylammoniumcation source as a template agent to obtain an initial gel mixture; after aging the initial gel mixture at an appropriate temperature, feeding the gel mixture into a high pressure synthesis kettle for crystallization; separating a solid product, and drying to obtain the Y type molecular sieve having a high silica-to-alumina ratio. The method provides a phase-pure Y type molecular sieve having a high crystallinity, the SiO2/Al2O3 thereof being not less than 6.

Abstract: A method for preparing a NaY molecular sieve having a high silica-to-alumina ratio, wherein deionized water, a silicon source, an aluminum source, an alkali source, and ILs as a template agent are mixed to obtain an initial gel mixture; the initial gel mixture is maintained at a proper temperature and aged, then fed into a high pressure synthesis kettle for crystallization; the solid product is separated and dried, to obtain the NaY molecular sieve having a high silica-to-alumina ratio, wherein the ILs is a short-chain alkylimidazolium ionic liquid, the template agent is less volatile, and the resultant high-silicon Y molecular sieve has a high crystallinity and a silica-to-alumina ratio of 6 or more.

Abstract: A method for preparing a NaY molecular sieve having a high silica-to-alumina ratio, wherein deionized water, a silicon source, an aluminum source, an alkali source, and ILs as a template agent are mixed to obtain an initial gel mixture; the initial gel mixture is maintained at a proper temperature and aged, then fed into a high pressure synthesis kettle for crystallization; the solid product is separated and dried, to obtain the NaY molecular sieve having a high silica-to-alumina ratio, wherein the ILs is a short-chain alkylimidazolium ionic liquid, the template agent is less volatile, and the resultant high-silicon Y molecular sieve has a high crystallinity and a silica-to-alumina ratio of 6 or more.