9 results about "Copper oxide nanoparticles" patented technology

A multilayer Janus membrane with directional wettability includes a polyvinylidene fluoride (PVDF) layer, a polyetherimide (PEI) layer and an intermediate layer of copper oxide nanoparticles and vinylidene fluoride and hexafluoropropylene copolymer (PVDF-HFP) or polyacrylonitrile (PAN). The intermediate layer is in contact between the PVDF layer and the PEI layer, and the PEI fibers interlock between the granular particles of the intermediate layer.

This invention relates to an air-to-water system and its absorbent gel. The preparation method of the absorbent gel includes: dispersing carboxymethyl cellulose in deionized water until a transparent solution is formed; adding copper oxide nanoparticles to the transparent solution and ultrasonically dispersing them uniformly to obtain a CuO / CMC pretreatment solution; adding hydroxypropyl methylcellulose to the CuO / CMC pretreatment solution and stirring until fully swollen to form a precursor solution; adding lithium chloride to the precursor solution and stirring until fully foamed to obtain a foam gel; and finally drying the foam gel to obtain the absorbent gel. The absorbent gel of this invention has low preparation cost, can rapidly and efficiently absorb / desorb moisture, and can be assembled into an independent passive water production system, thus adapting to a wider range of applications in arid regions.

The present application relates to the technical field of high polymer antibacterial health protection materials, in particular to a preparation method of a universal copper-based nanometer material, wherein copper hydroxide precipitate is obtained by adding sodium hydroxide solution into copper chloride water solution step by step, and then copper oxide nanoparticles are obtained by drying and grinding; copper nitrate trihydrate, lithium hydroxide monohydrate and water are mixed and then hydrothermally dispersed to obtain copper hydroxide nanowires; copper chloride dihydrate, lithium hydroxide monohydrate and water are mixed to obtain copper oxide nanosheet; finally, copper oxide nanoparticles, copper hydroxide nanowires and copper oxide nanosheet are dispersed and mixed to obtain a copper-based nanometer compound. The present application is a new type of copper-based nanometer antibacterial material with regular prism / rod microstructure, high dispersibility, strong base material compatibility, high temperature resistance and excellent durability. The material can be truly embedded in different base materials instead of only staying on the surface, and can be universally applied in various material systems such as silica gel, latex and yarn.

The present application belongs to the technical field of functional materials, and particularly relates to a coated carbon nanotube composite material and a preparation method thereof, and a functional polymer composite material and a preparation method thereof. The coated carbon nanotube composite material provided by the present application has a core-shell-shell structure coated in turn from inside to outside, wherein the carbon nanotube constitutes an inner core providing mechanical enhancement and an electrically conductive path, a silver layer coated on the surface of the carbon nanotube serves as an intermediate layer and a first antibacterial component, a copper oxide nanoparticle layer coated on the surface of the silver layer serves as an outer shell layer and a second antibacterial component, and the copper oxide layer and the silver layer form a heterojunction. The specific structure produces a synergistic effect of silver, copper oxide and carbon nanotube, so that the composite powder has the functions of high-efficiency antibiosis, antistatic and mechanical enhancement.

A kit, detection method, and application for detecting oligomeric single-stranded nucleic acids are disclosed. The kit is constructed based on a signal amplification strategy using a copper ion-responsive cyanine dye probe F-0 and copper oxide nanoparticles. MNPs are coupled with biotin-modified oligo1 to obtain MNPs@oligo1; disulfide-modified oligo2 is coupled with copper oxide nanoparticles to obtain CuO@oligo2. In the presence of the target nucleic acid, complementary hybridization occurs with both to form a three-dimensional sandwich structure of MNPs-target sequence-CuO. After magnetic separation and acid hydrolysis, CuO is released. 2+ The reagent is specifically recognized by the cyanine dye probe F-0 and generates a spectral response, enabling rapid detection of target nucleic acids. Using miRNA as a model, the detection limit can reach 1.5 fM. This kit is easy to use, highly sensitive, and has good specificity, making it suitable for the detection of various oligomeric single-stranded nucleic acids, including miRNAs, nucleic acid aptamers, and antisense oligonucleotides.

A black IR reflective or transmissive pigment from which LiDAR responsive black coatings can be formed where the pigment displays a Blackness My value similar to non-IR reflective carbon black. The CuO particles display small crystallites of less than 18 nm and an (−111) / (111) reflectance intensity ratio of less than 1.2. A method of forming the CuO particles includes precipitation of CuCO3 or CuCO3 / Cu(OH)2 using an alkali carbonate as a precipitant and calcining the precipitate at about 300° C. to about 400° C.

The study is concerned with synthesizing copper oxide nanoparticles with leaf extract Vitex Agnus-Castus (VAC). The leaf extract VAC is a reduction agent for the synthesis of the nanoparticles. The leaf extract was prepared and then processed in the precipitation using copper salt solutions. The results of scanning electron microscopy (SEM) and dynamic light scattering (DLS) revealed that the green synthesized copper oxide nanoparticles (CuO NPs) are spherical in shape and have a mean particle size of 22 nm. The XRD graph showed the crystalline and monoclinic phases of CuO NPs. The adsorption characteristics of the nano-adsorbents were investigated using Rhodamine B (RhB) as a target model. Box-Behnken design (BBD) in response surface methodology (RSM) was used to optimize various process parameters, such as pH solution (A: 3-11), adsorbing dose (B: 0.2-2 g.L-1), Concentration dye (C: 20-80mg.L-1). A second-order polynomial equation was used to calculate the experimental results. In conclusion, we have illustrated an effective and environmentally friendly nano-adsorbent for removing pollutants from waters, which will also be attractive for multifunction applications. Keywords: Green synthesis, CuO, Nanoparticles, Removal dye, Rhodamine blue. BBD, RSM

The application belongs to the field of membrane catalysis and separation technology, and particularly relates to a Cu(I)-MOF mixed matrix membrane, a preparation method, a photocatalysis-separation integrated device using the same and application. The mixed matrix membrane is prepared by mixing Cu(I)-MOF and a PEGBEM-POEM copolymer solution according to a specific mass ratio to obtain a casting solution, and then performing blade casting and drying; wherein the Cu(I)-MOF is synthesized from Hdmtz, Hdetz and copper oxide nanoparticles. The integrated device comprises a reactor shell provided with multiple parallel baffle assemblies, the mixed matrix membrane is fixed in the baffle assemblies, the internal space is divided into reaction-separation units in series, and a light source is arranged. After humid CO2 is introduced into the device, a photocatalytic reduction reaction occurs on the surface of the membrane under light to generate CO, and the high selectivity of the membrane to CO is used to realize in-situ separation and multi-stage purification of CO and O2. The application realizes efficient conversion and separation of CO2 into high-purity CO.