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Preparation method of titanium dioxide nanospheres of anatase-rutile mixed crystal

A technology of titanium dioxide and anatase, applied in the direction of titanium dioxide, titanium oxide/hydroxide, nanotechnology for materials and surface science, etc., can solve the problem of difficult to obtain particle-dispersed spherical products, unfavorable use, storage and transportation , It is not easy to prepare crystallinity and other problems, and achieve the effect of fine particles, short preparation time and large output

Active Publication Date: 2017-12-01
JILIN UNIV
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Problems solved by technology

It can be seen that the liquid phase preparation method has the following disadvantages: 1) the titanium source as one of the raw materials is dangerous and toxic, and in addition to the high price, it is also unfavorable for industrialized use, preservation and transportation; 2) The reaction time is long, the environment in the preparation process is not good, and more pollutants are produced; 3) It is difficult to obtain spherical products with good particle dispersion, and most of the structures are granular particles that are easy to agglomerate
4) It is not easy to prepare mixed crystal titanium dioxide with good crystallinity and high catalytic activity

Method used

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  • Preparation method of titanium dioxide nanospheres of anatase-rutile mixed crystal
  • Preparation method of titanium dioxide nanospheres of anatase-rutile mixed crystal

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Embodiment 1

[0021] Embodiment 1 equipment structure

[0022] The structural representation of the preparation system used in the present invention is as follows: figure 1 As shown, its main structure includes a coaxial magnetron plasma accelerator system composed of a non-magnetic metal inner cover 1, a plasma generating device 2, a non-magnetic metal outer cover 3, an accelerator system 4, and an iron electrode sheet 6, and an inductive element system 5, a switch 7. Capacitor 8, reaction chamber 9. Among them, the non-magnetic metal inner cover 1 and the non-magnetic metal outer cover 3 constitute a graphite electrode system, which mainly plays the role of heat dissipation and protection. The maximum charging voltage of the system is 5 kV, and the maximum charging capacitance is 28.8mF. Under the action of the plasma generator 2, the electric current generated by the discharge of the capacitor 8 converts the oxygen into a plasma state, and then the oxygen in the plasma state is acceler...

Embodiment 2

[0023] Example 2 Preparation of anatase-rutile mixed crystal titanium dioxide nanospheres

[0024] (1) Titanium electrode preparation: the commercially available high-purity titanium sheet (purity 99.99%) is processed into an electrode sheet of a magnetron plasma accelerator system device, and then cleaned by a standard semiconductor silicon wafer cleaning process (deionized water, acetone and anhydrous Alcohol was ultrasonically cleaned for 20 minutes), and it was assembled in the coaxial magnetron plasma accelerator system device of Example 1 as the titanium source of the reactant.

[0025] (2) Inflation: After the reaction chamber 9 in the equipment system of Embodiment 1 was evacuated, it was filled with industrial oxygen with a purity of 99.7%, and after the system air pressure returned to 1 atmospheric pressure, the aeration was stopped. Oxygen in chamber 9 acts as an oxygen source for the reactants.

[0026] (3) Plasma heating reaction. The equipment response paramete...

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Abstract

The invention discloses a preparation method of titanium dioxide nanospheres of anatase-rutile mixed crystal and belongs to the technical field of inorganic material preparation. The preparation method comprises the steps of preparation of a titanium electrode, air inflation, starting of plasma heating reaction, and product collection. The method has the advantages of being simple in preparation technology, short in preparation time, green in preparation process, high in yield and low in preparation cost; the titanium dioxide nanosphere composite structure of anatase-rutile mixed crystal is prepared through a one-step method; and the prepared titanium dioxide nanospheres of the anatase-rutile mixed crystal are fine, narrow in particle size distribution, good in crystallinity and good in monodispersity, has a smooth spherical structure, and is high in specific surface area and high in photocatalytic activity.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic materials, and specifically relates to a method for preparing titanium dioxide nanospheres of anatase-rutile mixed crystals. Background technique [0002] As a non-toxic, stable and efficient photocatalyst, nano-titanium dioxide has been widely used in photocatalysis, air purification, water treatment, ultraviolet absorber and other fields. It is a nanomaterial with the broadest application prospect. The photocatalytic performance of titanium dioxide is closely related to its crystal structure, surface microstructure (surface morphology, surface species, specific surface area and surface state energy level, etc.) and particle size. Titanium dioxide has the following three crystal forms: brookite, rutile and anatase, among which anatase titanium dioxide has higher photocatalytic activity. A large amount of experimental evidence shows that mixed crystals are beneficial to reduce th...

Claims

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Application Information

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IPC IPC(8): C01G23/047B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G23/047C01P2002/82C01P2004/03C01P2004/04C01P2004/32C01P2004/52C01P2004/62C01P2004/64C01P2004/82
Inventor 尉国栋刘莹伊万切伦科夫徐帅凯周密刘亚楠韩炜
Owner JILIN UNIV
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