11 results about "Triiodide" patented technology

This invention belongs to the technical field of solar cells and discloses a three-dimensional two-dimensional core-shell self-encapsulated inverted perovskite solar cell and its preparation method. The method involves preparing an inverted planar heterojunction perovskite solar cell using NiO nanocrystals with a particle size of 3-5 nm and SnO2 nanorods with a particle size of 2-4 nm and an aspect ratio of 3-5, respectively, forming a hole transport layer (15-25 nm) and an electron transport layer (15-30 nm). A pyridylamine derivative hydrohalate is attached as a ligand to the surface of the NiO nanocrystals and SnO2 nanorods and added to the PbI2 layer. During the two-step preparation of the three-dimensional perovskite light-absorbing layer (500-800 nm) of formamidine triiodide(II)ate (FAPbI3), two-dimensional perovskites are simultaneously generated at the FAPbI3 / hole transport layer interface, the FAPbI3 / electron transport layer interface, and the grain boundaries within the FAPbI3 layer, thus forming a three-dimensional two-dimensional core-shell self-encapsulated perovskite light-absorbing layer. Finally, an aluminum-doped zinc oxide (AZO) top electrode was sputtered onto the electron transport layer to obtain a three-dimensional two-dimensional core-shell self-encapsulated inverted perovskite solar cell.

The application discloses a kind of based on 3,3'-thiodipropionic acid pre-positioning regulation perovskite film preparation method, perovskite film and perovskite solar cell.For the problem that one-step method formamidine lead triiodide perovskite film exists in the process of anti-solvent induced crystallization kinetics uncontrollable, grain is small, and many defects, the preparation method disclosed in the application introduces trace 3,3'-thiodipropionic acid as additive in precursor solution.The additive is pre-coordinated with lead ions in the solution stage, and uniform wet film is quickly formed during spin coating, and controlled release and slow crystallization of lead species are realized during subsequent annealing process, so as to synergistically optimize film formation and crystallization kinetics.This method can significantly promote perovskite grain growth, reduce grain boundary density, and passivate film defects.Finally, the solar cell device based on the film shows higher photoelectric conversion efficiency and more excellent long-term working stability.

The present invention describes a method for synthesising triiodide anions inside zeolites in a single reactor by means of a cascade reaction comprising dehydroiodination of alkyl iodides and oxidation in-situ with air, generating a solid material that can be used as a heterogeneous catalyst, an electrolyte for photovoltaic or perovskite cells and an agent for controlled release of triiodide for disinfection and hypothyroidism.

The invention discloses a degradable cross-linked polymer material for efficiently capturing iodine as well as a preparation method and application of the degradable cross-linked polymer material. The polymer material is a three-dimensional network polymer, namely the target polymer material disclosed by the invention, which is formed by carrying out condensation polymerization on a multi-aldehyde-group functionalized reaction monomer prepared by reacting an aldehyde-group-containing phenolic biomass raw material from lignin and cyanuric chloride through a one-pot method and polyfunctional mercaptan under an acidic condition. The material does not contain miscellaneous calixarene macrocycles, and the synthetic route is simple. Multiple heteroatom sites of nitrogen, oxygen, sulfur and the like in a polymer network have specific high affinity to iodine steam and triiodide anions, the adsorption capacity to the iodine steam can be more than three times of the mass of the material, and the removal rate to low-concentration triiodide anions in water exceeds 90%. The raw materials are renewable, the process is simple and convenient, and the adsorbent has the characteristics of efficient adsorption, easiness in recovery and degradability, and is suitable for deep purification of radioactive and industrial iodine-containing waste gas and wastewater.

The application discloses a carbazole-maleimide alternating conjugated macrocyclic material for efficient capture of radioactive triiodide and a preparation method thereof. The conjugated macrocyclic compound has a rigid pi conjugated skeleton, can be efficiently synthesized through one-step tandem condensation reaction, and can obtain two different crystal conformations (MC-Czalpha and MC-Czbeta) through crystal condition regulation. The two conformations show significant differences when adsorbing triiodide (I3 ‑ ), wherein the MC-Czalpha conformation has superfast adsorption kinetics, the rate constant can reach 5.44*10 ‑2 g·mg ‑1 ·min ‑1 , and high removal efficiency is maintained in a wide pH range, and the reuse performance is stable. The conjugated macrocyclic compound has a clear structure, excellent adsorption performance, and has a good application prospect in the fields of nuclear waste treatment, environmental remediation and iodine detection.

This invention discloses a method for producing trifluoroiodomethane (CF3I), the method comprising: providing a feedstock containing trifluoroacetyl iodide (TFAI); passing the feedstock through at least one tower loaded with carbon-containing material to remove hydrogen iodide (HI), hydrogen triiodide (HI3), and iodine (I2) from the feedstock; and providing the feedstock to a reactor to produce a trifluoroiodomethane product stream. Another method for producing trifluoroiodomethane (CF3I) comprises: providing a feedstock containing trifluoroacetyl iodide (TFAI) to a reactor to produce a trifluoroiodomethane product stream; and passing the trifluoroiodomethane product stream from the reactor through at least one tower loaded with carbon-containing material to remove hydrogen iodide (HI), hydrogen triiodide (HI3), and iodine (I2) from the trifluoroiodomethane product stream.

This invention discloses an ultra-low thermal conductivity all-inorganic perovskite cesium bismuth iodide aerogel, its preparation method, and its applications, relating to the field of aerogel technology. The method involves dissolving cesium iodide and bismuth triiodide in a mixed solvent of oleic acid, oleylamine, and octadecene to obtain a cesium bismuth iodide mixed solution; maintaining the cesium bismuth iodide mixed solution at 120-260℃ for 1-48 hours, followed by sequential filtration and purification to obtain a cesium bismuth iodide colloid; aging the cesium bismuth iodide colloid and then drying it to form an ultra-low thermal conductivity all-inorganic perovskite cesium bismuth iodide aerogel. This invention improves the application performance of aerogels in medium- and low-temperature insulation fields by utilizing the ultra-low intrinsic thermal conductivity of the all-inorganic perovskite cesium bismuth iodide, along with its low-temperature thermal stability.

The application discloses a synthesis method of a (Z)-1-aryl sulfide-2-phenol ether-4-aryl-trisubstituted-1-butene-3-alkyne compound, which comprises two-step room temperature reactions: firstly, in a dry reaction container, 1,3-di-alkynyl triiodide reagent (I), a phenol compound, a base reagent and an organic solvent are mixed, and stirring reaction is carried out at room temperature until the starting material is completely consumed, and the solvent is removed by concentration under reduced pressure; then, a sulfenol compound, a copper catalyst and an organic solvent are added into the concentrated residue, and stirring reaction is carried out at room temperature until completion, and the target product (II) is obtained through post-treatment. The molar ratio of the 1,3-di-alkynyl triiodide reagent (I), the phenol compound and the sulfenol compound is 1:1.05:(1.1-1.3); the copper catalyst is selected from one of cuprous iodide, cuprous chloride and tetraethylammonium copper tetrafluoroborate, and the copper catalyst is preferably tetraethylammonium copper tetrafluoroborate; and the organic solvent is selected from acetonitrile, 1,2-dichloroethane and the like, and the total amount of the organic solvent added is 0.1 mmol in terms of the amount of substance of the reagent shown in formula (I). The method has mild reaction conditions, simple operation and can efficiently prepare the target compound.

A method of producing trifluoroiodomethane (CF3I) includes providing a feedstock comprising trifluoroacetyl iodide (TFAI), passing the feedstock through at least one column loaded with a carbon-containing material to remove hydrogen iodide (HI), hydrogen triiodide (HI3), and iodine (I2) from the feedstock, and providing the feedstock to a reactor to produce a trifluoroiodomethane product stream. Another method of producing trifluoroiodomethane (CF3I) includes providing a feedstock comprising trifluoroacetyl iodide (TFAI) to a reactor to produce a trifluoroiodomethane product stream, and passing the trifluoroiodomethane product stream from the reactor through at least one column loaded with a carbon-containing material to remove hydrogen iodide (HI), hydrogen triiodide (HI3), and iodine (I2) from the trifluoroiodomethane product stream.

The invention discloses a method for synthesizing a lead-free perovskite thin film in air, which is characterized in that the whole preparation process is completed under an ambient air condition without inert atmosphere protection; the preparation method comprises the following steps: dissolving cesium iodide and bismuth triiodide in a ternary mixed solvent to prepare a cesium bismuth iodide precursor solution; the indium tin oxide substrate is ultrasonically cleaned in an alkaline detergent, deionized water and at least two polar organic solvents in sequence; filtering the precursor solution through a filter membrane, and depositing a cesium bismuth iodide wet membrane on the surface of a pretreated cesium iodide substrate by adopting a two-step spin-coating method; and carrying out annealing treatment on the obtained wet film in air at 80-100 DEG C to form the CsBi3I10 film. By systematically optimizing a DMF: DMSO: ACN ternary solvent system, collaborative regulation and control of CsBi3I10 film crystallization kinetics and morphology are realized in ambient air, the excellent solubility of DMF, the strong coordination crystallization delaying effect of DMSO and the rapid volatilization film-forming promoting characteristic of ACN are fully exerted through the ratio, and a compact and pinhole-free high-quality film with the nearly ideal stoichiometric ratio is formed.

The application provides a perovskite solar cell and a preparation method thereof, and the perovskite solar cell comprises, from bottom to top, an ITO substrate, an electron transport layer, a perovskite light-absorbing layer, a hole transport layer and a metal electrode; the perovskite light-absorbing layer is modified by using a thermally activated delayed fluorescence polymer material to form an interface modification layer; the interface modification layer is located between the perovskite light-absorbing layer and the hole transport layer, the perovskite light-absorbing layer is a formamidinium lead triiodide system perovskite, and the wavelength of the thermally activated delayed fluorescence polymer material is 550-700 nm. The TADF polymer material is modified on the surface of the FAPbI3 system perovskite, the residual tensile stress of the FAPbI3 system perovskite in the heat treatment process is compensated, the photoactive alpha phase is stabilized, the reutilization of photo-generated excitons in the QW is realized through the energy transfer process, the radiative recombination loss is inhibited, and the efficiency of the perovskite solar cell is improved.