12 results about "Bismuth phosphate" patented technology

The invention discloses a hexagonal bismuth phosphate modified indium zinc sulfide (ZIS / HBIP) composite catalyst and a preparation method thereof. The catalyst is applied to photocatalytic synthesis of HO. The indium zinc sulfide (ZIS) nano flower balls in the catalyst are prepared by a hydrothermal method, and then hexagonal bismuth phosphate (HBIP) is loaded on the surface of the ZIS by a room temperature precipitation method to obtain a series of ZIS / HBIP composite catalysts. ZIS and HBIP can effectively improve photo-induced electron-hole separation and transmission, improve the selectivity of direct two-electron oxygen reduction reaction (2eORR) and inhibit HO decomposition. Experimental results show that when the theoretical dosage of HBIP is 0.01 mmol, the prepared ZIS / HBIP 0.01 has the optimal photocatalytic activity, the HO yield within 1 h can reach about 955 [mu] mol.g.h, and efficient synthesis of HO in pure water is achieved.

The present application belongs to the technical field of non-ferrous metallurgy, and particularly relates to a method for cooperatively removing copper, arsenic, tellurium and lead in crude bismuth, which comprises the following steps: S1, obtaining molten bismuth liquid by melting, adding an oxidizing agent to the molten bismuth liquid, and performing a pre-oxidation reaction under stirring; S2, adding a composite removing agent and a fluxing agent to perform a reaction, and then removing surface dross; the composite removing agent comprises iron powder, bismuth phosphate and sodium sulfide; S3, adding the crude bismuth after step S2 to a vacuum rectification furnace, vacuum heat-insulating, and outputting refined bismuth. Through the cooperative design of pre-oxidation activation, in-situ sulfidation and phosphate slagging, the present application realizes the simultaneous and efficient removal of impurities such as Cu, As, Te and Pb, and the effective recovery of Ag. Subsequent vacuum distillation further removes residual lead in depth, and ensures that the refined bismuth product reaches a high standard.

The invention provides a preparation method of aluminum oxide coated bismuth oxide powder, which comprises the following steps: preparing a bismuth oxide-aluminum oxide structure through a hydrothermal synthesis method, removing a pore forming agent through subsequent sintering to prepare bismuth oxide-porous aluminum oxide, and finally loading a flame retardant on a porous aluminum oxide shell layer through an impregnation method to prepare bismuth oxide composite particles. According to the preparation method disclosed by the invention, by preparing a core-shell structure with a porous shell, the range of bismuth oxide with high activity is limited, so that the situation that the stability of a finished product is influenced due to agglomeration of the bismuth oxide with high activity in the preparation process of the high polymer material is avoided; meanwhile, core layer bismuth oxide and the flame retardant loaded on the porous aluminum oxide shell layer rapidly react under the high-temperature condition, a bismuth phosphate compact layer is generated, oxygen and heat are isolated, so that the flame retardant property of the material is improved, meanwhile, due to the bismuth oxide and porous aluminum oxide structure, the density of the filler is greatly reduced, and development of a high-function light-weight material is promoted.

The present invention discloses a battery negative electrode material, its preparation method, and application. The battery negative electrode material includes an active material; the active material is a composite material containing bismuth phosphate, phosphorus, bismuth, and a conductive carbon material. By introducing bismuth phosphate into the active material, the battery negative electrode material of the present invention can, on the one hand, improve the dispersion of the conductive carbon material, phosphorus, and crystalline bismuth, thereby preventing agglomeration. Furthermore, since bismuth phosphate is an inactive component, the presence of bismuth phosphate in the active material can effectively mitigate the significant volume changes during charge and discharge, facilitating the stabilization of the SEI film, thereby imparting improved cycling stability to the electrode material.

The invention relates to a preparation method of a Fe-MOFs-Bi composite catalyst and application of the Fe-MOFs-Bi composite catalyst in wastewater treatment. The method comprises the following steps: 1) preparing MOFs-101 (Fe) and bismuth phosphate; (2) weighing MOFs-101 (Fe) and bismuth phosphate in different mass ratios, adding the weighed MOFs-101 (Fe) and bismuth phosphate into a mixed solution of ethylene glycol and water, and carrying out ultrasonic treatment; (3) after ultrasonic treatment, transferring into a polytetrafluoroethylene reaction kettle to carry out hydrothermal reaction, cooling the obtained product to room temperature, and washing the mixture with deionized water and ethanol for three times respectively; and 4) drying the washed product in a drying oven to obtain the Fe-MOFs-Bi composite catalyst. The prepared composite catalyst is high in light adsorption capacity, high in electron hole separation efficiency, stable in material structure and fast in photon-generated carrier transmission, recombination of photon-generated carriers can be effectively inhibited, a heterostructure is formed through interaction of BiPO4 generated in situ and MOFs, better visible light absorption performance is achieved, and degradation of COD in a solution is greatly improved.

The present invention provides a composite photocatalyst of oxygen-deficient bismuth phosphate nanorods loaded with cobalt nanoparticles, a preparation method, and an application thereof. The composite photocatalyst comprises oxygen-deficient bismuth phosphate nanorods and cobalt nanoparticles loaded on the surfaces of the oxygen-deficient bismuth phosphate nanorods; the cobalt nanoparticle loading amount is 5-30wt% based on the total weight of the oxygen-deficient bismuth phosphate nanorods as 100%. The composite photocatalyst of oxygen-deficient bismuth phosphate nanorods loaded with cobalt nanoparticles is used for the synergistic degradation of antibiotics through photocatalysis and persulfate advanced oxidation technology. The composite photocatalyst exhibits high degradation activity, a significantly reduced band gap width, a red-shifted spectral response, and a significantly increased degradation rate compared to pure bismuth phosphate.

The invention provides a BiPO4 / CdIn2S4 composite photocatalyst, a preparation method thereof and application of the BiPO4 / CdIn2S4 composite photocatalyst in photocatalytic degradation of methylene blue, and relates to the technical field of environmental catalytic materials.CdIn2S4 (indium cadmium sulfide) microspheres and rod-like BiPO4 (bismuth phosphate) are prepared through a hydrothermal method, and then a BiPO4 / CdIn2S4 heterojunction is constructed through a mechanical mixing method; wherein the optimal molar ratio of BiPO4 to CdIn2S4 is 1: 5 (marked as BC5). According to the composite photocatalyst disclosed by the invention, through the heterostructure design, the material contact area is obviously increased, the photo-induced electron migration path is shortened, the photo-induced electron-hole pair compounding is effectively inhibited, and the visible light absorption range is widened; under the optimal condition, the MB degradation rate within 180 min reaches 99.31%, the degradation rate is only reduced by 6.09% after five times of recycling, and the stability is excellent. The preparation process is simple and convenient, the cost is low, the methylene blue dye wastewater can be efficiently treated, and the industrial application prospect is wide.

The invention discloses a lead-free diode glass bulb and a preparation method thereof, belongs to the technical field of diode glass bulbs, and creatively introduces a modified bismuth phosphate complex to solve the key problems that a traditional lead-free glass bulb is prone to causing thermal damage, devitrification defects, insufficient dielectric strength, weak acid corrosion resistance and the like in the low-temperature sealing process. The components form an amorphous wetting layer at a high temperature, so that the sealing activation energy is remarkably reduced, and thermal damage is avoided while low-temperature sealing is realized; meanwhile, the dielectric density is enhanced by filling micropores with bismuth ions, and the dielectric strength and the insulation reliability are improved; the phosphorus component is combined with aluminum ions to form a passive film, so that the acid corrosion resistance is greatly enhanced; according to the present invention, the bottleneck in the prior art is broken through, the glass bulb is suitable for the severe environments such as miniaturized equipment, automotive electronics and industrial high-temperature systems, and the packaging safety, the durability and the reliability of the glass bulb are significantly improved.

The invention provides a catalyst as well as a preparation method and application thereof. The catalyst comprises a carrier, active components and silicon dioxide, wherein the active components and the silicon dioxide are dispersed on the carrier; the active components comprise a main catalyst and a cocatalyst; the carrier is a molecular sieve, the main catalyst is phosphate of metal palladium, and the cocatalyst is tin phosphate and / or bismuth phosphate. According to the technical scheme, the active components are loaded on the molecular sieve, so that the pore structure and reaction sites of the carrier can be effectively improved, and the problems of low activity and poor selectivity of the catalyst are solved. Wherein the cocatalyst is added, so that the interaction between the noble metal main catalyst and the carrier is enhanced, the overall activity and stability of the catalyst are improved, and the dosage of noble metal palladium is reduced; meanwhile, non-metallic element phosphorus is dispersed in a carrier framework, so that the pore structure of the catalyst is effectively improved, the selectivity of the catalyst is improved, the carbon deposition resistance of the catalyst can be improved, and the service life of the catalyst is prolonged.

A battery negative electrode material, and a preparation method therefor and a use thereof. The battery negative electrode material comprises an active material; the active material is a composite material containing bismuth phosphate, phosphorus, bismuth, and a conductive carbon material. By introducing bismuth phosphate into the active material, on the one hand, the battery negative electrode material can enhance the dispersion effect of the conductive carbon material, phosphorus and crystalline bismuth, effectively preventing the occurrence of agglomeration; and on the other hand, because the bismuth phosphate is an inactive ingredient, the presence of bismuth phosphate in the active material can effectively mitigate a large volume change during charging and discharging, facilitating the stability of an SEI film, thereby endowing electrode materials with better cycle stability.

The present invention discloses a titanium carbide / bismuth oxyiodide / bismuth phosphate-based photoelectrochemical sensor for dopamine detection and a preparation method thereof. The photoelectrochemical sensor is prepared by forming a titanium carbide / bismuth oxyiodide / bismuth phosphate (BT / BiPO4) composite material into a film on the surface of a glassy carbon electrode. The BT / BiPO4 composite material has good light response, and rapid electron transfer provides high sensitivity for dopamine detection. The photoelectrochemical sensor of the present invention is applied to dopamine detection, has high sensitivity, and has good linear response in the range of 0.01 to 10 mM.

The invention discloses a negative-electrode-free sodium metal battery negative electrode current collector coating and a preparation method thereof, relates to a sodium battery negative electrode and a preparation method thereof, and aims to solve the technical problems of high nucleation overpotential and poor stable circularity of an existing negative-electrode-free sodium battery. The negative current collector coating of the negative-electrode-free sodium metal battery is prepared from an active substance, a conductive carbon material and an adhesive, wherein the active substance is bismuth fluoride, ferric fluoride, tin fluoride, bismuth oxide, antimony oxide, bismuth phosphate, antimony phosphate, bismuth acetate, lead acetate or antimony acetate. The active substance, the conductive carbon material and the adhesive are prepared into slurry, and the slurry is coated on the fluid and then dried. The half cell assembled by using the negative electrode current collector and sodium realizes the average coulombic efficiency of more than 99.5%, and realizes stable circulation for 300 circles in a sodium battery without a negative electrode. The method can be used in the field of sodium batteries or sodium metal batteries.