The invention relates to a method for preparing titanium dioxide/mesoporous carbon composite photocatalyst by electron beam irradiation, belonging to the technical field of radiation chemistry and photocatalyst preparation technology. The preparation method mainly comprises the following steps of: firstly, adding mesoporous carbon CMK-3 into TiF4 solution, uniformly mixing by ultrasound, pouring the solution into a self encapsulation, irradiating under an 2.5MeV and 40mA electronic accelerator with the irradiation dose of 140-700Kgy, wherein the mass ratio of the mesoporous carbon and the carbon tetrafluoride is 0.17, i.e. CMK-3: TiF4=0.17; secondly, putting the solution after irradiation into an oven to react for 20h under the temperature of 60 DEG C; and thirdly, washing and drying to finally obtain obtaining TiO2/CMK-3 composite photocatalyst. A product has favorable the photocatalysis performance.

Method for preparing titanium dioxide/mesoporous carbon composite photocatalyst by electron beam irradiation

The invention discloses a method for preparing silicon dioxide-clad carbon nanotubes and silicon dioxide nanotubes. According to the method, active metal is used as a reducing agent, and silicon chloride is used as a silicon source. The method comprises the following steps of: heating the active metal and the silicon chloride to a temperature of between 450 and 600 DEG C, and keeping the temperature for 3 and 8 hours; reacting reagents; naturally cooling, and cleaning and leaching by using deionized water until a filtrate is neutral; drying the filtrate at the temperature of between 50 and 70DEG for 8 and 12 h to obtain the black grey silicon dioxide-clad carbon nanotubes; and heating the obtained silicon dioxide-clad carbon nanotubes in air to the temperature of between 700 and 750 DEG C for oxidation treatment, and thus obtaining the grey white silicon dioxide nanotubes. According the method, the silicon tetrachloride is used as the silicon source, zinc is used as the reducing agent and metal solvent, and the silicon dioxide nanotubes are prepared by a hard template method. The method has the advantages of simple equipment, stable process and high production efficiency and can be used for preparing the silicon dioxide-clad carbon nanotubes and the silicon dioxide nanotubes on a large scale.

Method for preparing silicon dioxide-clad carbon nanotubes and silicon dioxide nanotubes

The invention relates to a method for preparing hydrophobic white carbon black. The method comprises the steps of (a) weighing 1,000 parts by weight of sodium silicate solution with the concentration of 12-15%, adding 100-120 parts by weight of sodium sulfate into the sodium silicate solution, and uniformly stirring thoroughly so as to obtain mixed liquid; (b) adding 10-15% of sulfuric acid solution into the obtained mixed liquid, reacting until sodium silicate reaction is completed, and continuously stirring a reaction system at the rate of 1,200-1,500rpm while dropwise adding 0.1-0.2 part by weight of simethicone, so as to enable precipitates to appear in the reaction system. The method has the beneficial effects that through adding simethicone to coat silicon dioxide particles, the hydrophobicity of silicon dioxide is improved, the aggregation of the silicon dioxide particles is slowed down, the particle diameter of the white carbon black product is reduced, and the specific surface area is increased.

Method for preparing hydrophobic white carbon black

The invention discloses a method for preparing a silicon nanometer micro-tube by utilizing silk fibroin as a template. The method specifically comprises the following preparation steps: template preparation, silicon dioxide deposition, calcination and the like. The method has the benefits that as the silk fibroin template adopted in the method is the biological template, compared with other micro-tube templates, the silk fibroin template has high biological safety and wide sources, can be regenerated, cannot generate other wastes and has no pollution to the environment, so that the production cost is remarkably reduced; as both APTES (Aminopropyltriethoxysilane) and TEOS (Tetraethyl Orthosilicate) used in the method are moderate reagents with low toxicity, the reaction conditions are mild, the reaction cycle is short, a large quantity of products can be obtained within a short period, and the production efficiency is high; the method not only can be used for the synthesis of the silicon nanometer micro-tube, but also plays a reference role in the formation of titanium, aluminum and other inorganic metal nanometer micro-tubes; in addition, based on the method, a titanium/silicon double-layered or three-layered nanometer micro-tube can also be synthesized.

Method for preparing silicon nanometer micro-tube by utilizing silk fibroin as template

The invention discloses a carbon nanotube rodlike nanocomposite material modified by organic spherical silica and a preparation method thereof The carbon nanotube rodlike nanocomposite material modified by the organic spherical silica is characterized in that organic spherical silica nanoparticles with amidogen react with a carboxyl functional group on the surface of an oxidized carbon nanotube through the amidogen to form amido bond, and therefore covalently-bound carbon nanotube rodlike nanocomposite material modified by the organic spherical silica is obtained, wherein the mass ratio of the oxidized carbon nanotube to the organic spherical silica nanoparticles with the amidogen is 1:2-15, and the organic spherical silica nanoparticles with the amidogen are of a core-shell structure that the surface of the core of silica is coated with the amidogen The technology is easy and convenient to implement, the reaction period is short, the obtained material is regular in structure, clear in appearance, high in productivity and purity and good in stability, has the certain organic compatibility and can be used for polymer modification prepared high-performance nanocomposite materials such as thermosetting resin, thermosetting resin and rubber The method is compact in technology, low in cost and short in reaction time, and the product is good in structure oneness and suitable for large-scale industrial production

Carbon nanotube rodlike nanocomposite material modified by organic spherical silica and preparation method thereof

The invention relates to a method for preparing a carbon nanotube of silicon dioxide by using a multi-wall carbon nanotube as a template The specific steps of the method are as follows: the multi-wall carbon nanotube treated by the mixed acid is ultrasonically dispersed in citric acid solution with the concentration of 003M and pH value of 3 and absolute ethyl alcohol to uniformly form dispersion solution; aminopropyltriethoxylsilane (APTS) and tetraethoxysilane (TEOS) are mixed in 1:9 by volume to form mixed liquid; the mixture is mixed with the dispersion solution obtained in step 1, and stirred for 2 hours at room temperature, ultrasonic is carried out on the mixture for 1 minute every 30 minutes; wherein, the mass ratio of the multi-wall carbon nanotube and the mixture is equal to 1:5-1:10; the solution obtained in step 2 is adjusted to lead the pH value to be 85-95, and is stirred for 24 hours at room temperature, ultrasonic is carried out on the solution for 1 minute every 2hours within the first 10 hours; after the reaction finishes, the mixture is centrifuged to discard the supernatant fluid, is washed by absolute ethyl alcohol and calcined for 3 hours after dried at 800 DEG C, thus the carbon nanotube of silicon dioxide is made The carbon nanotube of silicon dioxide prepared by the method has high tubulation rate, integral shape, smooth wall and no visible defect, and the method can control the thickness of the nanotube

Method for preparing silicon dioxide nano-tube with multi-walled carbon nanotube

The invention relates to a method for coating a carbon nanotube with silica. The method consists of the following specific steps: the carbon nanotube is ultrasonically dispersed into citric acid solution to form the citric acid buffer solution of the carbon nanotube; the citric acid buffer solution is added with the solvent of absolute ethyl alcohol and ultrasonically dispersed evenly; the dispersion solution is mixed with the mixture of aminopropylmethyldimethoxysilane (APTS) and tetraethoxysilane and agitated for 2 hours at the room temperature, and ultrasonic is carried out for 1 minute every 30 minutes; wherein, the mass ratio between the multi-wall carbon nanotube and the mixture is 1:5-1:10; pH of the solution obtained in step b is adjusted to 8.5-9.5 and agitated for 24 hours at room temperature; and ultrasonic is carried out for 1 minute every 2 hours in the first ten hours; after the reaction stops, the supernatant is discarded by centrifugation; the nanotube is washed by absolute ethyl alcohol and the carbon nanotube coated by silicon dioxide is obtained after drying. The method has the advantages: 1) the coating effect is good, and an even and single SiO2 coating layer can be obtained on the surface of carbon nanotubes; 2) operation is simple and technological processes are few; 3) the thickness of the silicon dioxide coating layer can be adjusted and the coated carbon nanotube has wider application.

Novel method for coating carbon nano-tube with silicon dioxide

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Method for preparing silicon dioxide nano-tube with multi-walled carbon nanotube

Novel method for coating carbon nano-tube with silicon dioxide