摘要:
A method of synthesizing ligand-conjugated gold nanoparticles (AuNPs) is disclosed. The method comprises: a) providing an amine-modified silica particle; b) providing a solution comprising Au+3 ions; c) suspending the amine-modified silica particle in the solution comprising Au+3 ions; d) allowing the Au3+ ions to be adsorbed and/or immobilized onto the surface of the amine-modified silica particle; e) exposing the Au3+ ions immobilized onto the surface of the amine-modified silica particle to radiation to obtain bare gold nanoparticles (AuNPs) adsorbed and/or immobilized onto the surface of the amine-modified silica particle, wherein the bare AuNPs are without organic surface modifications; and f) reacting a ligand with the bare AuNPs adsorbed and/or immobilized onto the surface of the amine-modified SiNP and thereby obtain ligand-conjugated gold nanoparticles (AuNPs).
摘要:
A system and method for treating biomass so as to convert the biomass into a useful form is provided. In some embodiments, the system and method allow treating a biomass mixed in a fluid medium in an acoustic resonator chamber. The chamber may be used to mix the biomass with other chemical agents or catalysts. The chamber is also coupled to one or more acoustical drivers to provide an acoustical (e.g., ultrasonic) field in the chamber, which can also be driven to cause acoustic cavitation in some embodiments. The acoustic resonator chamber may also be placed under static pressure to enhance a mechanical, acoustical, or chemical effect during processing. Various examples of co-processing or pre-processing stages are also provided, including acid, base, AFEX, ammonia and other stages to enhance a desired effect.
摘要:
A method for curing a resin includes the steps of placing the resin into a reaction vessel, drawing a vacuum in the reaction vessel, positioning the reaction vessel in a gaseous coupling fluid, and applying ultrasonic energy to the coupling fluid.
摘要:
Water-resistant silica-embedded textiles and methods for production of water-resistant silica-embedded textiles are disclosed. Initially, a silica colloidal solution including hydrophobic fumed silica nanoparticles is obtained. A polycarboxylic acid cross-linking agent and a hypophosphite catalyst are mixed in deionized water and the mixture of the polycarboxylic acid cross-linking agent and the hypophosphite catalyst is added to the silica colloidal solution to form a silica padding solution. Next, a textile is treated with the silica padding solution to form a silica-embedded textile. Finally, the silica-embedded textile is cured.
摘要:
In a method for separating rich ore particles from agglomerates which contain said rich ore particles and magnetizable particles attached thereto, especially Fe3O4, in which agglomerates of the rich ore particle and the magnetizable particle are bonded by organic molecular chains, the agglomerates are contained in a suspension containing a carrier fluid and are broken up by an input of mechanical energy so that an agent contained in the suspension and decomposing the exposed, hydrophobic molecular chains can act upon the molecular chains. The Fe-containing oxide components are separated from the suspension in a magnetic separation process.
摘要:
The present invention relates to a process for preparing substituted 2-aminobiphenyls and to a process for preparing (Het)arylamides of such 2-aminobiphenyls.
摘要:
A self-contained, high efficiency cellulose biomass processing plant includes sources of quantum-based wave energy to facilitate the dilute acid hydrolysis of hemi-cellulose and alpha-cellulose bond. The sources of quantum-based wave energy supply one or more of, and suitably a combination of ultrasonic waves, ultraviolet waves, magnetic waves and direct current to facilitate fracture of the intermolecular bonds. An integrated plant is also provided which combines the cellulose biomass processing plant with apparatus for converting high protein residue into a finished high grade protein product. Due to the high efficiency resulting from use of quantum-based wave energy, the plant uses less energy, and can be small and portable.
摘要:
The present invention provides a method of producing pristine or non-oxidized nano graphene platelets (NGPs) that are highly conductive. The method comprises: (a) providing a pristine graphitic material comprising at least a graphite crystallite having at least a graphene plane and an edge surface; (b) dispersing multiple particles of the pristine graphitic material in a liquid medium containing therein no surfactant to produce a suspension, wherein the multiple particles in the liquid have a concentration greater than 0.1 mg/mL and the liquid medium is characterized by having a surface tension that enables wetting of the liquid on a graphene plane exhibiting a contact angle less than 90 degrees; and (c) exposing the suspension to direct ultrasonication at a sufficient energy or intensity level for a sufficient length of time to produce the NGPs. Pristine NGPs can be used as a conductive additive in transparent electrodes for solar cells or flat panel displays (e.g., to replace expensive indium-tin oxide), battery and supercapacitor electrodes, and nanocomposites for electromagnetic wave interference (EMI) shielding, static charge dissipation, and fuel cell bipolar plate applications.
摘要:
This invention is directed to a method of performing a stereoselective reaction without use of a solvent comprising contacting a reactant with a chiral reagent under sonication conditions to form an excess of an enantiomer.
摘要:
An action on liquids by the energy of a cavitation acoustic field, which is generated by ultrasonic frequency elastic oscillations of a liquid, in such a way that athermodynamic disequilibrium state is formed in the liquids. Such a mechanism for transmitting energy to a liquid is an epithermal mechanism and produces therein the process which is inherent to high-energy physics and chemistry. It makes it possible, for example, to accumulate a certain quantity of energy in water by destroying the internal structure thereof formed by hydrogen bonds of individual molecules therebetween, practically without heating it and afterwards, to release the energy in the form of a hydration heat, while the water recovers the equilibrium state thereof or interacts with other substance. The cavitation reactor of this invention includes a harmonic oscillation source in the form of equifrequential resonators in which liquid oscillations produce elastic stationary waves. The reactor has a harmonic oscillation source embodied so that it enables the advance phase shift of the resonators proportionally to the displacement thereof away from the reactor center. The reactor also has a phase shift value of each resonator equal to the ratio between the distance of the oscillation units of the resonators to the reactor center and the wavelength in the liquid.