A kind of nanocomposite catalyst that is easy to recycle and preparation method thereof

A nanocomposite and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as difficult recycling and unsatisfactory catalytic effect of catalysts, and achieve excellent biocompatibility, good Physicochemical properties, effect of catalyst consumption saving

Inactive Publication Date: 2011-12-14
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a novel composite nano-catalyst preparation method to obtain a novel composite nano-catalyst with excellent catalytic performance and easy recycling, and solve the problem of unsatisfactory catalytic effect and difficult recovery of existing pure titanium dioxide or loaded titanium dioxide catalysts. At the same time, it effectively reduces the amount of titanium dioxide used in the catalytic object per unit volume, improves the use efficiency of the catalyst, and reduces the use cost of the catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Measure 20mL 0.1mol / L CaCl 2 Aqueous solution, 20mL 0.06mol / LKH 2 PO 4 Add 0.02 g of polyethylene glycol to the aqueous solution, place the two solutions on both sides of the casing, let stand for 10 hours, until the system fully reacts, take the precipitates on both sides, wash and dry to obtain hydroxyapatite powder; Put 1 g of the obtained hydroxyapatite powder and 0.5 g of the commercially available 10 nm anatase titanium dioxide nanopowder into a beaker, use absolute ethanol as the medium, ultrasonically disperse for 1 hour, filter it with suction, and dry it naturally at room temperature. A hydroxyapatite / titanium dioxide nanocomposite catalyst was obtained.

Embodiment 2

[0015] Measure 20mL 0.1mol / L CaSO 4 Aqueous solution, 20mL 0.06mol / L K 2 HPO 4 Add Triton-100 0.02g to the aqueous solution, place the two solutions on both sides of the swim bladder, and let it stand for 10 hours until the system fully reacts, take the precipitates on both sides, wash and dry to obtain hydroxyapatite powder ; The obtained hydroxyapatite powder 1g and the commercially available 10nm anatase titanium dioxide nanopowder 1g are put into a beaker, with absolute ethanol as the medium, after ultrasonic dispersion for 1 hour, suction filtration, and natural drying at room temperature, namely A hydroxyapatite / titanium dioxide nanocomposite catalyst was obtained.

Embodiment 3

[0017] Measure 20mL 0.1mol / L CaCl 2 Aqueous solution, 20mL 0.06mol / L NaH 2 PO 4 Add 0.02g of polyethylene glycol to the aqueous solution, put the two solutions on both sides of the egg membrane, let it stand for 10 hours, until the system fully reacts, take the precipitates on both sides, wash and dry to obtain hydroxyapatite powder 2g of the obtained hydroxyapatite powder and 0.5g of commercially available 10nm anatase titanium dioxide nano-powder are put into a beaker, with absolute ethanol as the medium, after ultrasonic dispersion for 1 hour, suction filtration, and natural drying at room temperature, The hydroxyapatite / titanium dioxide nanocomposite catalyst is obtained.

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Abstract

The invention belongs to the technical field of material chemistry, and in particular relates to an easily recyclable nanocomposite catalyst and a preparation method thereof. The invention uses the hydroxyapatite nano-assembled ball chain with a length of micron as the carrier, utilizes the characteristics of large surface area and high surface activity, and loads titanium dioxide nano-powder on it. The easily recyclable nanocomposite catalyst has high catalytic activity and high chemical stability, and can be widely used in many fields such as the degradation of harmful substances in water bodies and photovoltaic cells.

Description

technical field [0001] The invention belongs to the field of material chemistry, and in particular relates to an easily recyclable nanocomposite catalyst and a preparation method thereof. Background technique [0002] Water pollution and air pollution in life are always threatening people's health. Harmful organic substances in water, aldehydes, phenols, alcohols and other harmful substances released from furniture and coatings have been highly valued for harming people's health. How to reduce pollution and protect the environment has become an issue of increasing concern, and the preparation of photocatalysts capable of degrading harmful organic substances has become one of the hotspots in powder research. Titanium dioxide nanopowders have attracted a lot of attention for their excellent biocompatibility, safety, non-toxicity and outstanding photocatalytic properties. However, the disadvantage is that the particle size of titanium dioxide nanopowder is too small, so it is ...

Claims

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Application Information

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IPC IPC(8): B01J27/18
Inventor 刘金库王建栋
Owner EAST CHINA UNIV OF SCI & TECH
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