A kind of inorganic perovskite nanocomposite fiber film and its application method
A technology of nano-composite fibers and nano-composite materials, which can be used in fiber processing, textile and paper making, filament/thread forming, etc., and can solve the problems of high toxicity of nano-structured materials, decreased material performance, and decreased chemical activity.
Active Publication Date: 2022-04-29
TSINGHUA UNIV
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[0004] However, the above-mentioned materials still face a series of problems in the process of industrial application, such as the high toxicity of nanostructured materials themselves, CsPbX 3 Perovskite materials contain toxic lead elements, which cause CsPbX 3 The phase change of perovskite materials leads to the reduction of its chemical activity and the loss during use, which can easily lead to a sharp decline in the performance of the material and serious safety issues.
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[0045] Place 20 parts by weight CsPbBr 3Nanocrystals, 0.05 parts by weight graphene quantum dots, 200 parts polymethyl methacrylate dissolved in 1500 parts by weight methyl acetate to make a jet liquid, using high-speed, high-pressure jet molding technology, CsPbBr is produced under the condition of high pressure of 20kV and jet velocity of 0.5mm / min 3 The nano-composite fiber membrane is maintained for 3h under air conditions of 150 °C and humidity of 30% to obtain passivated CsPbBr 3 Nanocomposite fiber membrane, as shown in STEM diagrams of nanocomposite fibers Figure 2 As shown, the EDS results are as follows Figure 3 as shown. As can be seen from the figure, CsPbBr 3 The nanocrystals are evenly distributed on the surface and inside of the prepared nanofiber membranes, and EDS also shows that the prepared particle composition is CsPbBr 3 。 Prepared CsPbBr 3 Fluorescence effects of nanocomposite fiber membranes such as Figure 4 As shown, its photocatalytic degradation of methy...
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The present invention adopts high-speed, high-pressure jet molding technology to prepare fiber-staggered network structure nanofiber membrane, CsPbX 3 (X is a halogen element) the perovskite and its nanocomposite material are uniformly dispersed on the surface and inside of the fiber membrane, and the gain material is dispersed or attached to the surface of the fiber membrane and the composite material. The nanocomposite fiber membrane has the characteristics of high fluorescence, high catalytic activity and stable performance. It can be used as an effective way to store active materials and a raw material for inkjet printing inks, and meets anti-counterfeiting identification, safety monitoring, building photovoltaic integration, biomedicine, Application requirements in the fields of visible light wireless communication, pollutant degradation, energy conversion, etc.
Description
Technical field [0001] The present invention belongs to the field of nanocomposites and application technologies, particularly relates to a highly fluorescent, highly catalytic activity of inorganic perovskite nanocomposite fiber film and application method thereof. Background [0002] In recent years, all-inorganic perovskite CsPbX 3 (X is a halogen group element) nanocrystals have received extensive attention from researchers because of their unique physicochemical characteristics, such as high light absorption coefficient, adjustable band gap width, excellent fluorescence performance, etc., and have been deeply studied and applied in the fields of solar cells, light-emitting diodes, photoelectric detection, lasers and other fields. [0003] The inventors carried out a lot of basic and applied research work in the early stage, and developed a series of in situ growth CsBX on the surface of nano-two-dimensional materials 3 (B is a composite material containing +2 valent state e...
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IPC IPC(8): D04H1/728D01D5/00D06C7/00
CPCD04H1/728D01D5/0015D06C7/00
Inventor 林红张琦邓晓楠李双寿汤彬谭承宇
Owner TSINGHUA UNIV