5 results about "Nano carbon" patented technology

The invention discloses nano-titanium carbon composite material with ultra-high thermal conductivity, which is characterized in that: the invention has the components by weight percentage: 40 - 85 percent of acidized expansive graphite, 5 - 40 percent of flake graphite nano power, 5 - 30 percent of mesophase nano carbon power and 5 - 30 percent of metal titanium nano powder. The production process is that: the four components are weighted and mixed under temperature of 300 to 500 DEG C in a high-temperature reaction furnace for 2 - 5 hours so as to obtain concentrated mixture solution used for making carbon at high temperature; the concentrated mixture experiences molding, rolling or ejaculating under pressure of 120 - 300MPa and at temperature of 300 - 500 DEG C, so as to form; then the formed material is carbonized under temperature 900 - 1000 DEG C for 1 - 12 hours, and graphitized under temperature of 2500 to 3000 DEG C for 1 - 12 hours. The invention has simple technique and low production cost; the thermal conductivity of the invention can be lifted to above 700W/mK.

The invention discloses a preparation method of a compound modified electrode for simultaneously detecting lead and cadmium ions. The preparation method comprises the following steps: preparing graphene; preparing nano graphene; preparing micro-nano carbon spheres; synthesizing a micro-nano carbon sphere, nano graphene and naphthol compound modification liquid; modifying a working electrode based on a micro-nano carbon sphere, nano graphene and naphthol compound modification liquid; and simultaneously detecting heavy metal lead ions and cadmium ions. When the modified electrode manufactured by the method is applied to a sensor, the simultaneous sensitive detection of heavy metal lead ions and cadmium ions with similar potentials is realized, the detection sensitivity and the detection speed can be effectively improved, and the detection limit is far lower than the minimum content requirement of the heavy metal lead ions and cadmium ions in drinking water; and the compound modified electrode is simple in structure, low in energy consumption, raw material cost, process cost and labor cost, excellent in mechanical property and chemical corrosion resistance, and capable of achieving the effects of saving energy, reducing emission, treating environmental pollution and guaranteeing life health, and the whole detection system is convenient to achieve miniaturization and automation.

The invention discloses a microwave-assisted large-scale preparation method of carbon nanospheres from lignin. The method comprises the steps of uniformly mixing the lignin with silicon carbide, and putting a mixture in a microwave tubular reactor; introducing nitrogen into an inlet of the microwave tubular reactor to discharge air in a reaction system, connecting outlet gas of the microwave tubular reactor with a cold hydrazine system, enabling nitrogen to pass through dichloromethane to enable the nitrogen to carry dichloromethane, and introducing the nitrogen carrying the dichloromethane into the microwave tubular reactor; under the condition of ensuring that nitrogen carrying dichloromethane is introduced, the microwave tubular reactor is started to carry out reaction, taking the mixture of lignin carbon and silicon carbide from the microwave tubular reactor after the reaction is finished, putting the mixture into water or ethanol, performing uniform stirring and standing, taking out lignin carbon floating on a liquid, and performing drying to obtain a solid product, namely the carbon nanospheres. The method is beneficial to the turning of waste lignin resources into wealth, and the high-valued utilization is realized.