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The invention provides a preparation method for sensitization-enhanced green light-emitting high-silica glass. The preparation method comprises the following steps: melting borosilicate glass, controlling heat treatment conditions, restricting the degree of phase-splitting and carrying out acid leaching so as to obtain porous glass which contains a part of residual Na <+> ions; dipping the porous glass in a solution containing Tb and Eu ions for immersion and doping; and sintering the porous glass at a high temperature in a reducing atmosphere so as to obtain the compact sensitization-enhanced green light-emitting high-silica glass. According to the invention, since a glass structure has Na <+>, energy transfer between ion is achieved and the excitation band of Tb<3+> ions is transferred and becomes about 320 nm instead of about 245 nm, thereby not only effectively increasing the excitation bandwidth of Tb<3+> but also greatly improving luminous intensity. The sensitization-enhanced green light-emitting high-silica glass prepared in the invention is expected to be used as a novel luminescence and laser material in a variety of fields like scientific research, national defense and health care.

The invention belongs to the field of photocatalytic thin films and in particular relates to an embedded type TiO2 hollow sphere / GaN / Ga2O3 heterojunction photocatalytic thin film and a preparation method thereof. The embedded type TiO2 hollow sphere / GaN / Ga2O3 heterojunction photocatalytic thin film is prepared from ITO (Indium Tin Oxide) transparent conducing glass, a beta-Ga2O3 thin film locatedon the ITO transparent conducing glass, a GaN thin film located on the beta-Ga2O3 thin film, a beta-Ga2O3 / GaN heterojunction thin film located between the beta-Ga2O3 thin film and the GaN thin film and a TiO2 hollow sphere embedded in the beta-Ga2O3 / GaN heterojunction thin film. The photocatalytic thin film provided by the invention has a three-dimensional space multi-phase heterojunction interface structure and comprises a TiO2 / Ga2O3 heterojunction interface, a TiO2 / GaN heterojunction interface, a GaN / Ga2O3 heterojunction interface and a TiO2 / GaN / Ga2O3 heterojunction interface; the heterojunction interfaces have a mutual synergistic effect and photon-generated carriers can be effectively separated so that the photocatalytic performance of the material is greatly improved; the photocatalytic efficiency of degrading Rhodamine B is high and the photocatalytic efficiency keeps constant after a plurality of times of circulation; the embedded type TiO2 hollow sphere / GaN / Ga2O3 heterojunctionphotocatalytic thin film provided by the invention has stable performance and has a very great application prospect in the field of photocatalytic degradation of organic pollutants.

The invention discloses a preparation method and application of a magnetic nanocomposite catalyst with a core-shell structure, comprising the following steps: S1, comprising Fe 2+ Metal salt X and containing Co 2+ Dissolve the metal salt Y in deionized water, stir evenly, to the mixed solution A; S2, remove the dissolved oxygen in the mixed solution A by ultrasonic vibration or suction filtration, and obtain the mixed solution B; S3, add the NaOH solution dropwise to the mixed solution In liquid B, mixed liquid C is obtained; in S4, the mixed liquid C is refluxed, heated and stirred, and the product is taken out after standing still, and washed multiple times with deionized water and absolute ethanol, then dried and ground to obtain powdered magnetic cobalt Iron hydroxide; S5, the powdered magnetic cobalt-iron hydroxide is calcined, ground and sieved to obtain the 3 o 4 For the shell, CoFe 2 o 4 A magnetic nanocomposite catalyst with a core-shell structure as the core. The preparation process is simple and easy to operate, and it can realize the microscopic control of the composite catalyst morphology, form a core-shell structure, and help the electron transfer in the catalytic reaction process.

The invention relates to a bimetallic PtSn / C catalyst for a high-activity fuel cell and its preparation and application. The preparation method specifically includes the following steps: (a) Pt(acac) 2 and CTAB were added to oleylamine and stirred ultrasonically, then W(CO) was added 6 and SnCl 2 2H 2 O is formed in the reaction system for heating reaction to obtain bimetallic PtSn materials; (b) after the reaction system is cooled to room temperature, the bimetallic PtSn obtained in step (a) is washed and loaded on activated carbon, and then post-treated to obtain bimetallic PtSn / C Catalyst. Compared with the prior art, the catalyst prepared by the invention has high catalytic activity and good stability, can be used as an anode catalyst of a direct methanol fuel cell, and has a simple preparation process.

The invention provides a modified diaphragm and a lithium-sulfur battery of a carborane-based covalent organic framework material. The modified diaphragm used in the lithium-sulfur battery is selected from a polymer diaphragm as the main body, and a modified layer is coated on one side of the polymer diaphragm. The modified layer is a new type of carborane COFs material. The carborane COFs material modification layer contains a carborane structure. Due to the special and highly electron-deficient structure of carborane, boron at the polar site in the structure forms a strong bond with polysulfide, and carborane The structure provides extremely abundant polar sites for the adsorption of polysulfides (LiPSs), combined with the inherent excellent physical and chemical properties of COFs, significantly inhibits the generation of the shuttle effect, thereby improving the charge-discharge specific capacity of lithium-sulfur batteries and cycle stability, which result in fast reaction kinetics and excellent electrochemical stability.

The invention relates to a preparation method of an Ag and N co-doped TiO2 nano-film and application of the nano-film. The aim of the invention is to solve the technical problems of complex preparation process, poor repeatability and low photocatalytic performance in the traditional methods. A technical scheme adopted in the invention comprises: placing a glass substrate on a sample stage in a magnetic control sputtering apparatus; vacuumizing a sputtering chamber to at least 8*10<-4 >Pa, introducing argon to the sputtering chamber to rise the reaction pressure in the sputtering chamber to 3.2-4.3 Pa; after pre-sputtering, performing direct current sputtering with a Ag target to prepare a monolayer Ag film on the glass substrate; then radio frequency sputtering a N doped TiO2 film on the monolayer Ag film through using a TiO2 target in a mixed atmosphere of argon and nitrogen; and finally subjecting the Ag and N doped TiO2 double-layer film obtained through sputtering to annealing to obtain the Ag and N co-doped TiO2 monolayer film. The Ag and N co-doped TiO2 monolayer film prepared by the method disclosed in the invention has visible-light catalytic activity and can be applied to photocatalytic degradation of liquid-phase dyes.