Preparation method for controllable growth of large-size mesoporous monocrystal rutile titanium dioxide
A rutile titanium dioxide, large-size technology, applied in the direction of single crystal growth, single crystal growth, crystal growth, etc., can solve the problem of lack of effective methods for large-sized mesoporous single crystals, and achieve uniform morphology, uniform pore size distribution, and pore size. evenly distributed effect
Inactive Publication Date: 2020-05-29
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Problems solved by technology
Mesoporous single-crystal titanium oxide has attracted widespread attention because of its large specific surface area and single-crystal characteristics, but there has been a lack of effective methods for the preparation of large-sized mesoporous single crystals.
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Embodiment 1
[0027] In this example, RuO 2 Example of preparing mesoporous single crystal rutile for seeds:
[0028] (1) Preparation of silicon sphere precursor solution: 99ml tetraethyl orthosilicate, 18ml ammonia water, and 32ml deionized water were respectively added to 750ml absolute ethanol solution, and then stirred for 24 hours to form a cloudy solution.
[0029] (2) The preparation process of the seed template: take 3g of close-packed silica spheres (30-50nm in diameter) and put them into 50ml of RuCl with a molar concentration of 0.4mM 3 In the aqueous solution, keep warm in a water bath at 70°C for 1 hour, then take out the silica ball seed template and rinse it with a large amount of deionized water, put it in a heating mantle at 90°C and dry it, then place it in a muffle furnace at 500°C for 30 minutes to obtain the seeded silica Silicon sphere seed template. After fully grinding the prepared silica ball seed template for 30 min, take 100 mg of silica ball seed template, add ...
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Abstract
The invention relates to the field of preparation of mesoporous metal oxide by a template method, and in particular, relates to a preparation method for controllable growth of large-size mesoporous monocrystal rutile titanium dioxide. According to the method, titanium tetrachloride is used as a precursor in a wet chemical process, silicon dioxide spheres containing extremely low-concentration seeds are used as a template, rutile titanium dioxide with exposed specific crystal faces is grown in a hydrothermal mode, and large-size mesoporous monocrystal rutile titanium dioxide is obtained after the template is etched. The preparation method comprises the steps: grinding silicon spheres containing seeds, re-dispersing the ground silicon spheres into a silicon sphere precursor solution to obtain silicon dioxide spheres with extremely low seed concentration, putting a titanium tetrachloride precursor and the silicon dioxide template into a reaction kettle, and carrying out heating treatmentand etching to obtain the large-size mesoporous monocrystal rutile titanium dioxide.
Description
technical field [0001] The invention relates to the field of preparation of mesoporous metal oxides by a template method, in particular to a preparation method for the controllable growth of large-sized mesoporous single crystal rutile titanium dioxide. 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. Mesoporous single crystal titanium oxide has attracted extensive attention because of its large specific surface area and single crystal characteristics, but there has been a lack of effective methods for the preparation of large-sized mesoporous single crystals. Mesoporous single-crystal rutile titanium oxide was grown by template hydrothermal method, and the concentration of seeds was an important factor limiting single-crystal growth. By grinding the silicon balls containing the seeds and redisper...
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IPC IPC(8): C30B29/16C30B7/10
CPCC30B7/10C30B29/16Y02A40/28
Inventor 刘岗邓国强成会明
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI