The invention discloses a cellulose/graphene oxide/ferroferric oxide composite hydrogel catalytic carrier applied to the field of sewage treatment and a preparation method thereof. The preparation method comprises the following steps: firstly preparing a sodium hydroxide/urea aqueous solution and dissolving cellulose after precooling treatment; then adding the graphene oxide aqueous solution intothe cellulose solution and carrying out tape casting and solidification to obtain cellulose/graphene oxide hydrogel; soaking the hydrogel in a mixed aqueous solution of ferrous chloride and ferric chloride and a sodium hydroxide aqueous solution in sequence to generate ferroferric oxide in situ and repeatedly washing with deionized water to obtain the cellulose/graphene oxide/ferroferric oxide composite hydrogel catalytic carrier applied to the field of sewage treatment. The hydrogel catalytic carrier has excellent sewage treatment capacity and can effectively degrade dyes which are difficultto degrade in industrial wastewater. The preparation method has the advantages of being easy to operate, green and pollution-free, capable of realizing large-scale production, simple in technologicalprocess and the like.

Cellulose/graphene oxide/ferroferric oxide composite hydrogel catalytic carrier applied to field of sewage treatment and preparation method thereof

The invention discloses an air purification material and a preparation method thereof. The preparation method comprises the following steps of immersing hydrogel of bacterial cellulose in deionized water and then conducting compacting to remove moisture in the hydrogel; heating and dissolving polyacrylonitrile, carrying out electrostatic spinning to prepare polyacrylonitrile nanofibers, and then dispersing the polyacrylonitrile nanofibers in a solvent; ultrasonically dispersing graphene oxide into deionized water, then adding bacterial cellulose and polyacrylonitrile nanofibers into a hydrothermal stirring kettle, carrying out hydrothermal reaction for a period of time, and carrying out freeze drying to obtain graphene-polyacrylonitrile-bacterial cellulose aerogel; and adding the graphene-polyacrylonitrile-bacterial cellulose aerogel into deionized water, then adding a Cr source, conducting stirring, adding tetrabutyl titanate, conducting mixing, continuously adding MnCl2 and a potassium permanganate solution, dropwise adding a certain amount of an ammonia water solution, conducting heating to 140-160 DEG C, and conducting reacting for 5-10h under the temperature to obtain the graphene-polyacrylonitrile-bacterial cellulose aerogel Cr-doped TiO2-MnO2 composite material.

Air purification material and preparation method thereof

The invention provides Fe3O4@bacterial cellulose/graphene oxide composite aerogel as well as a preparation method and application thereof. The preparation method comprises the following steps: washingbacterial cellulose with water, soaking in a sodium hydroxide alkali solution, and removing saccharides; adding the crushed bacterial cellulose slurry into ultrasonically dispersed graphene oxide mixed liquid, stirring uniformly, then ultrasonically vibrating and mixing, and standing for a period of time; adding an appropriate amount of mixed liquid of FeSO4.7H2O, FeCl3.6H2O, polyethylene glycol4000 and absolute ethanol, adding a suitable amount of ammonia water under the condition of high temperature stirring, carrying out a reaction for a period of time, and freeze-drying to obtain the Fe3O4@bacterial cellulose/graphene oxide composite aerogel material. The material is used for absorbing and removing heavy metals such as Pb, Cd, Cu, Cr and Mn in sewage and polluted soil; the preparation method not only improves the absorption performance of the bacterial cellulose, but also enhances the separation effect of the material, thus avoiding secondary pollution.

Fe3O4@bacterial cellulose/graphene oxide composite aerogel as well as preparation method and application thereof

The invention belongs to the technical field of coatings, and discloses bright-yellow high-near infrared reflection ferric-doped bismuth molybdate pigment and preparation and application thereof. Thebright-yellow high-near infrared reflection ferric-doped bismuth molybdate pigment has a chemical composition of Bi(2-x)FexMo3O12, wherein x = 0.01-0.4. The preparation method comprises the followingsteps: (1) preparing ammonium molybdate, a bismuth salt and an iron salt into solutions separately so as to obtain an ammonium molybdate solution, a bismuth salt solution and an iron salt solution; (2) mixing the bismuth salt solution with the iron salt solution so as to obtain a mixed solution, adding the mixed solution to the ammonium molybdate solution, adjusting the pH value of the system to 7-9, and continuing to heat for a reaction so as to obtain a precipitate; and (3) drying the precipitate, performing heat treatment and ball milling so as to obtain the ferric-doped bismuth molybdate pigment. The method is simple, the obtained pigment has vivid bright-yellow color and a property of extremely high reflection of near-infrared band light, and the total reflectance is more than 95%; and the pigment can be applied to preparation of high-near infrared reflection coatings.

Bright-yellow high-near infrared reflection ferric-doped bismuth molybdate pigment and preparation and application thereof

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Fe3O4@bacterial cellulose/graphene oxide composite aerogel as well as preparation method and application thereof

Bright-yellow high-near infrared reflection ferric-doped bismuth molybdate pigment and preparation and application thereof