The invention discloses an iron and nitrogen co-doping titanium dioxide/active carbon photocatalyst as well as a preparation method and application thereof. The preparation method comprises the process steps of raw material mixing, forming, hardening, activating, roasting, washing, drying and the like. The preparation method has the advantages of reducing the energy consumption, saving the operating time, simplifying the operation process and using equipment and reducing the running cost, and the prepared iron and nitrogen co-doping titanium dioxide/active carbon photocatalyst has a higher efficiency of removing contaminants, a higher reuse ratio, and better environmental compatibility and uniformity.

Iron and nitrogen co-doping titanium dioxide/active carbon photocatalyst

The invention relates to a preparation method of an attapulgite/porous carbon composite material. According to the method, attapulgite and rice husks are taken as raw materials. The preparation method comprises the following steps of: firstly, successfully loading amorphous carbon on the surface of the attapulgite by a one-step method; and then, carrying out alkali activation and high-temperature calcination to prepare the attapulgite/porous carbon composite material. The obtained composite material has excellent adsorption performance.

Preparation method of attapulgite/porous carbon composite material

The invention relates to a method for protecting the original porous texture of rice hulls at a high temperature. The technical scheme of the invention is as follows: placing the rice hulls in a hydrochloric acid, sulfuric acid or oxalic acid solution, soaking for 1-2h at 90-100 DEG C with a stirring speed of 350-450r/min, filtering, washing the acid-leached rice hulls with water until the pH of the filtrate is 6-8, and insulating for 24-30h at 80-100 DEG C to obtain pretreated rice hulls; adding the pretreated rice hulls to an oxide sol in a proportion of 1kg:(25-35L), standing for 0.5-12h by a vacuum degree of 0.07-0.08MPa, relieving the negative pressure, placing for 2-24h at room temperature, and insulating for 24-30h at 80-100 DEG C to obtain retreated rice hulls; and then keeping the retreated hulls for 3-4h at 900-1600 DEG C to obtain the high-temperature treated rice hulls. The rice hulls treated by the method provided by the invention can keep the original porous texture at a high temperature and form a compound with an infrared screening agent in-situ, and the method realizes high-efficiency and comprehensive utilization of wastes.

Method for protecting original porous texture of rice hulls at high temperature

The invention relates to a method for preparing a mesoporous carbon loaded TiO2 (titanium dioxide) photocatalysis material in a two-step hydrothermal method, which relates to a method for preparing a photocatalysis material, and aims to the technical problem that an existing carbon material loaded photocatalysis material is low in degradation rate. The method disclosed by the invention comprises the following steps: I, preparing a solution A; II, preparing a solution B; III, dropwise adding the solution B into the solution A while in stirring to obtain a mixed solution; IV, preparing mesoporous carbon; and V, ultrasonically dispersing the mesoporous carbon into ethanol, adding tetrabutyl titanate, adding deionized water to obtain the mixed solution, and filling the mixed solution into a hydrothermal kettle to generate hydrothermal reaction to obtain the material. After the mesoporous carbon loaded TiO2 photocatalysis material prepared through the method is degraded for 2 hours in a photocatalysis manner, the degradation rate can reach more than 95 percent. The method belongs to the field of the preparation of the photocatalysis materials.

Method for preparing mesoporous carbon loaded TiO2 (titanium dioxide) photocatalysis material in two-step hydrothermal method

The invention discloses a method for preparing an efficient adsorption composite material by taking silicate clay and rice husk as raw materials. The method comprises: adding a NaOH solution with a concentration of 1.5-4 mol/L into a mixture of silicate clay and rice husk with a mass ratio of 0.2-3:1, placing in a high-pressure reaction kettle, raising the temperature to 150-250 DEG C, and keeping warm for 10-24 h, wherein the mass ratio of the sum of silicate clay and rice husk to NaOH is 0.4-1.2:1; adding a NaAlO2 solution into the mixed slurry, under the condition of stirring, raising the temperature to 30-95 DEG C, and keeping warm for 4-25 h, wherein the mass ratio of the NaAlO2 solution to the silicate clay/rice husk active carbon composite material prepared in the step 2 is 8-25:1, and the NaAlO2 solution is prepared from NaAlO2 and deionized water according to a mass ratio of 3:10; and performing filtering, washing and drying on the crystallized substance, at nitrogen atmosphere, raising the temperature to 430-580 DEG C, and sintering for 2-16 h to prepare the efficient adsorption composite material. The efficient adsorption composite material prepared by taking silicate clay and rice husk as the raw materials is verified to have excellent adsorption performance.

Method for preparing efficient adsorption composite material by taking silicate clay and rice husk as raw materials

The invention discloses a method for preparing a rice hull active carbon/silicon dioxide/titanium dioxide composite material in the technical field of preparation of nano titanium dioxide photocatalysts. The method comprises the following steps of: carrying out acid cleaning on rice hull powder; adding an NaOH solution into the rice hull powder which is subjected to acid cleaning and carrying out alkali cooking to obtain mixed size consisting of rice hulls and sodium silicate; preparing a rice hull/silicon dioxide/titanium dioxide precursor; and finally carrying out carbonization and activating treatment to prepare the rice hull active carbon/silicon dioxide/titanium dioxide composite material. The rice hulls and nano titanium dioxide are combined in a chemical bond mode by silicon dioxide. The rice hull active carbon/silicon dioxide/titanium dioxide composite material not only has excellent adsorption performance of rice hull active carbon, but also has excellent photocatalysis performance of the nano titanium dioxide. The problem that the nano titanium dioxide is easy to fall off on the surface of a vector is effectively avoided. The stability of the composite material is greatly improved. The method has the advantages of simple preparation process, low price of raw materials, low cost and low pollution.

Method for preparing rice hull active carbon/silicon dioxide/titanium dioxide composite material

The present invention provides a clay composite material, wherein a mass ratio of aluminum phosphate to clay in the composite material is 0.2-0.8:1, and a mass ratio of aluminum hydroxide to the clay is 0.2-1.2:1. The preparation method for the composite material comprises the following steps: 1, sequentially adding sulphuric acid or hydrochloric acid, and phosphoric acid with a mass percentage of 5-85% to a clay slurry, and carrying out a reaction at a room temperature to obtain an acidified clay slurry; 2, controlling the temperature of the resulting acidified clay slurry from the step 1 to 30-60 DEG C, stirring while adding a sodium aluminate aqueous solution, stopping the addition of the sodium aluminate aqueous solution when the pH value of the system is 1.5-2.5, and holding the temperature while carrying out a stirring reaction for 0.5-3 hours; increasing the temperature of the system to 70-95 DEG C, continuously adding the sodium aluminate aqueous solution, stopping the addition of the sodium aluminate aqueous solution when the pH value of the system is 6.0-8.0, continuously holding the temperature while carrying out the stirring reaction for 1-3 hours, filtering, washing, drying, and crushing to obtain the clay/aluminum phosphate/aluminum hydroxide composite material.

Clay composite material and preparation method thereof

The invention discloses a fuel additive for improving the explosion-proof performance of gasoline and a preparation method of the fuel additive, belonging to the field of fuel additives. The explosion-proof performance of the gasoline can be improved by adding an organic alcohol compound and a lithium elementary substance or compound synthetic product to the gasoline. The fuel additive is simple in process and easy to produce and has an excellent technical effect. The fuel additive as a gasoline explosion-proof agent has the explosion-proof performance of a metal explosion-proof agent, has the capabilities of remarkably improving the octane value of the gasoline and improving the combustion performance of the gasoline, also can effectively eliminate combustion residues, reduce waste gas discharge and the like, and has no adverse effect on a gasoline engine.

Fuel additive for improving explosion-proof performance of gasoline and preparation method of fuel additive

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Method for preparing rice hull active carbon/silicon dioxide/titanium dioxide composite material

Clay composite material and preparation method thereof

Fuel additive for improving explosion-proof performance of gasoline and preparation method of fuel additive