Preparation method for controllable growth of heterogeneous seed meso-porous monocrystalline rutile titanium dioxide

A technology of rutile titanium dioxide and silicon dioxide balls, which is applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of ineffective separation of photogenerated carriers and poor contact quality of co-catalyst interface, etc. Achieve uniform shape and uniform pore distribution

Active Publication Date: 2018-01-05
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Problems solved by technology

In recent years, the deposition of co-catalysts is mainly through heat sinking and optical deposition. The co-catalysts deposited by these two methods have poor interfacial contact quality, so that the photogenerated carriers cannot be effectively separated and reacted.

Method used

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  • Preparation method for controllable growth of heterogeneous seed meso-porous monocrystalline rutile titanium dioxide
  • Preparation method for controllable growth of heterogeneous seed meso-porous monocrystalline rutile titanium dioxide
  • Preparation method for controllable growth of heterogeneous seed meso-porous monocrystalline rutile titanium dioxide

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Embodiment

[0038] In this example, RuO 2 Preparation of mesoporous single-crystal rutile TiO as heterogeneous seeds 2 For example:

[0039] Seed template preparation process: take 3g close-packed SiO 2 Put the ball template into 50mL RuCl with a molar concentration of 0.04mM 3 In the aqueous solution, the water bath is at 70°C for 1h, then the silica ball seed template is taken out, rinsed with a large amount of deionized water, and dried in a heating mantle at 80°C; after that, it is placed in a muffle furnace at 500°C for 30min to obtain heterogeneous seeds. Silica ball seed template.

[0040] Prepare TiCl 4 Precursor: 1.64 mL of TiCl 4 Slowly drop into 292mL of concentrated hydrochloric acid with a concentration of 37wt% (ice-water bath), then add deionized water to 1L, and mix well.

[0041] Preparation of mesoporous samples: Take 40 mL of the above precursor solution, put it into a polytetrafluoroethylene liner, add 80 mg of NaF as a shape control agent, add 500 mg of silica b...

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Abstract

The invention relates to the field of preparation of heterogeneous seed meso-porous metal oxides, and concretely relates to a preparation method for the controllable growth of heterogeneous seed meso-porous monocrystalline rutile titanium dioxide. The method comprises the following steps: carrying out hydrothermal growth by adopting titanium tetrachloride as a precursor and silica spheres containing heterogeneous seeds as a template through a wet chemical process in order to obtain specific crystal plane-exposed rutile titanium dioxide, and etching the template to obtain the meso-porous monocrystalline rutile titanium dioxide containing heterogeneous seeds. The preparation method can realize heterogeneous seed epitaxy growth of a cocatalyst, and solves the problems of poor interface contact quality and low photocatalytic efficiency of a catalyst and the cocatalyst. Compared with traditional seed template methods, the preparation method is characterized in that the titanium tetrachloride precursor and the heterogeneous seed silica template are added into a reaction kettle, and undergo heat treatment and etching to obtain the specific crystal plane-exposed meso-porous moncrystallinerutile titanium dioxide.

Description

technical field [0001] The invention relates to the field of preparation of heterogeneous seed mesoporous metal oxides, in particular to a preparation method for the controllable growth of heterogeneous seed mesoporous single crystal rutile titanium dioxide, which uses ruthenium dioxide (tin dioxide, iridium dioxide) ) heterogeneous seeds, with TiCl 4 Hydrothermal growth of mesoporous single crystal rutile TiO with specific facets as precursors 2 . Background technique [0002] Due to the advantages of high stability, suitable band gap, low cost, and non-toxicity, titanium dioxide has attracted extensive attention and in-depth research as a classic photocatalytic material. In addition to being used in photocatalytic water splitting, titanium dioxide photocatalysts are also widely used in photodegradation, solar cells, photoelectrochemistry, and self-cleaning. Because the photocatalytic reaction is mainly carried out on the surface of semiconductor materials, and a certain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B01J21/06
CPCB01J21/06B01J37/10C01G23/053
Inventor 刘岗吴亭亭甄超成会明
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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