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Preparation method of highly oriented transparent dihydroxy metal oxide film

A double-hydroxy compound and oxide film technology, applied in chemical instruments and methods, aluminum compounds, inorganic chemistry, etc., can solve the problems of complex peeling process, difficult control, easy aggregation, high laminate activity, etc., to achieve easy operation, Equipment requires simple, highly directional effects

Inactive Publication Date: 2008-10-22
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the peeling process of the laminates is complicated and difficult to control, the peeled laminates have high activity and are easy to aggregate, and the function of the LDHs film prepared by this method is limited by the type of interlayer anions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Step A: take by weighing 41.03g Mg(NO 3 ) 2 ·6H 2 O and 30.01g Al(NO 3 ) 3 9H 2 O dissolved in 300mL to remove CO 2 In water, prepare a mixed salt solution, take another 19.2g NaOH and dissolve it in 300mL to remove CO 2 In water, quickly pour the alkali solution and the mixed salt solution into the fully back-mixed rotating liquid film reactor at room temperature for 1 min, and the resulting slurry was heated at 100°C under N 2 Crystallize under protection for 8 hours, centrifuge, and wash the obtained sample until neutral. A small amount of sample was taken out and dried at 60°C for 24 hours and ground to obtain Mg 2 Al-NO 3 LDHs powder.

[0018] Step B: Weigh 1.5g of centrifuged and washed sample, add 10mL to remove CO 2 water, stir evenly at room temperature, pour into a petri dish, and dry at 60°C for 4 hours to obtain transparent Mg 2 Al-NO 3 LDHs film, its Mg 2+ / Al 3+ =2.

[0019] Mg 2 Al-NO 3 XRD patterns of LDHs films and Mg 2 Al-NO 3 The...

Embodiment 2

[0021] Step A: take by weighing 38.68g Nii (NO 3 ) 2 ·6H 2 O and 24.99g Al(NO 3 ) 3 9H 2 O dissolved in 250mL to remove CO 2 In the water, prepare a mixed salt solution, another 15.20g NaOH is dissolved in 250mL to remove CO 2 At room temperature, quickly pour the alkali solution and the mixed salt solution into the fully back-mixed rotary liquid film reactor to react for 1min, and the obtained slurry was heated at 100°C under N 2 Crystallize under protection for 8 hours, centrifuge, and wash the obtained sample until neutral. A small amount of sample was taken out and dried at 60°C for 24 hours and ground to obtain Ni 2 Al-NO 3 LDHs powder.

[0022] Step B: Weigh 3g of centrifuged and washed sample, add 10mL to remove CO2 2 water, stirred evenly at room temperature, poured into a petri dish, and dried at 20°C for 4 days to obtain green transparent Ni 2 Al-NO 3 LDHs film, its Ni 2+ / Al 3+ =2.

[0023] will Ni 2 Al-NO 3 XRD patterns of LDHs films and Ni 2 A...

Embodiment 3

[0025] Step A: take by weighing 28.56g Zn(NO 3 ) 2 ·6H 2 O and 9.00g Al(NO 3 ) 3 9H 2 O dissolved in 150mL to remove CO 2 In the water, it is prepared as a mixed salt solution, and another 9.12g NaOH is dissolved in 150mL to remove CO 2 At room temperature, quickly pour the alkali solution and the mixed salt solution into the fully back-mixed rotary liquid film reactor to react for 1min, and the obtained slurry was heated at 100°C under N 2 Crystallize under protection for 8 hours, centrifuge, and wash the obtained sample until neutral. A small amount of sample was taken out and dried at 60°C for 24 hours and ground to obtain Zn 2 Al-NO 3 LDHs powder.

[0026] Step B: Weigh 2 g of the centrifuged and washed sample, add 10 mL to remove CO 2 water, stir evenly at room temperature, pour into a petri dish, and dry at 50°C for 6 hours to obtain transparent Zn 2 Al-NO 3 LDHs film, its Zn 2+ / Al 3+ =2.

[0027] Zn 2 Al-NO 3 XRD patterns of LDHs films and Zn 2 Al-N...

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Abstract

The invention discloses a making method of high-oriented transparent bihydroxy composite metal oxide film, which comprises the following steps: adapting core-crystal separation method to prepare sheet-like LDHs nanometer particle with even grain size distribution; forming continual, high-oriented transparent LDHs film b directly by solvent evaporation method; preparing multifunctional LDHs film through controlling the kind and composition of host laminate metal element and interlaminar objective anion. The invention overcomes the limitation of LDHs powder material in the real appliance, which can be used in the photoelectric catalysis, separation and sensor.

Description

[0001] Field [0002] The invention belongs to the technical field of double hydroxyl compound metal oxides, and in particular relates to a preparation method of a highly oriented transparent double hydroxyl compound metal oxide film. Background technique [0003] Layered double hydroxyl compound metal oxides, also known as hydrotalcites (Layered Double Hydroxides, abbreviated as LDHs), are an anionic layered material. The chemical composition of the main layer of LDHs and the type and quantity of interlayer anions are all adjustable, so they have a variety of physical and chemical properties, and have broad application prospects in catalysis, separation, sensors, photochemistry, and electrochemistry. At present, the research and application of LDHs at home and abroad are generally limited to LDHs powder materials. However, LDHs powder materials have disadvantages such as easy loss and difficult recycling. Making LDHs into highly oriented transparent films can overcome the abo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G1/04C01F7/00
CPCC30B7/04C30B29/22
Inventor 王连英刘淼段雪李仓
Owner BEIJING UNIV OF CHEM TECH