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Preparation method of silver/silver chloride and titanium dioxide composite heterostructure nano-material

A technology of titanium dioxide and heterostructure, applied in the field of environmental sanitation, photocatalytic materials, and solar energy, can solve the problems of low sterilization performance, high cost, and complicated preparation process, and achieve the effects of low cost, easy control, and high size uniformity

Active Publication Date: 2015-12-16
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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Problems solved by technology

[0005] Aiming at the shortcomings of existing materials such as low bactericidal performance under visible light, complex preparation process and high cost, the technical problem to be solved in the present invention is to use a simple method to synthesize a silver / chloride compound with excellent bactericidal performance under visible light with low cost. Silver oxide and titanium dioxide composite heterostructure nanomaterial and preparation method thereof

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Embodiment 1

[0038] The preparation method of the silver / silver chloride and titanium dioxide composite heterostructure nanomaterial of this embodiment is as follows:

[0039] At room temperature, under the action of magnetic stirring, 6mmol (0.66mL) TiCl 4 Add 40mL alcohol mixed solution to form a concentration of 0.15M TiCl 4 Dilute solution, wherein the alcohol mixture is ethanol and diethylene glycol, and its volume ratio is 10:1. Slowly add 2.5mL of silver nitrate solution of 0.3mmol85% acetic acid to the above solution, stir vigorously for 10 minutes, and then add the concentration of Adjust the pH to approximately 5 with 0.4 M NaOH in ethanol. The above mixed solution was introduced into a polytetrafluoroethylene-lined reaction kettle with a volume of 100 mL, and kept at 200° C. for 12 hours to obtain a deposit. Then, the resulting deposit was washed several times with ethanol and water, and dried at 80°C to obtain the Ag / AgCl / TiO 2 Powder, the sample is marked as A.

[0040] Ad...

Embodiment 2

[0043] The preparation method of the silver / silver chloride and titanium dioxide composite heterostructure nanomaterial of this embodiment is as follows:

[0044] At room temperature, under the action of magnetic stirring, 8mmol (0.88mL) TiCl4 Add 40mL alcohol mixed solution to form a concentration of 0.2M TiCl 4 Dilute solution, in which the alcohol mixture is ethanol and ethylene glycol, and its volume ratio is 10:1. Slowly add 2 mL of 0.8 mmol 90% acetic acid silver nitrate solution to the above solution, stir vigorously for 10 minutes, and then add a concentration of 0.8 M NaOH in ethanol to adjust the pH to about 6. The above mixed solution was introduced into a polytetrafluoroethylene-lined reaction kettle with a capacity of 100 mL, and kept at 160° C. for 12 hours to obtain a deposit. Then, the resulting deposit was washed several times with ethanol and water, and dried at 80°C to obtain the Ag / AgCl / TiO 2 Powder, the sample is marked as B.

[0045] Adopt the equipmen...

Embodiment 3

[0047] The preparation method of the silver / silver chloride and titanium dioxide composite heterostructure nanomaterial of this embodiment is as follows:

[0048] At room temperature, under the action of magnetic stirring, 6mmol (0.66mL) TiCl 4 Add 40mL of TiCl formed in the alcohol mixed solution 4 Dilute solution, wherein the alcohol mixture is n-propanol and diethylene glycol, and its volume ratio is 10:1. Slowly add 3 mL of silver nitrate solution of 0.6 mmol 80% acetic acid into the above solution, stir vigorously for 10 minutes, and then add the concentration of Adjust the pH to approximately 4 with 0.5 M NaOH in ethanol. The above mixed solution was introduced into a polytetrafluoroethylene-lined reaction kettle with a capacity of 100 mL, and kept at 180° C. for 10 hours to obtain a deposit. Then, the resulting deposit was washed several times with ethanol and water, and dried at 80°C to obtain the Ag / AgCl / TiO 2 Powder, the sample is marked as C.

[0049] Adopt the ...

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Abstract

The invention belongs to the fields of solar energy, environment health and photocatalysis materials, and concretely relates to a preparation method of a silver / silver chloride and titanium dioxide composite heterostructure nano-material with an excellent sterilization performance under visible light. The method comprises the following steps: dissolving an organic matter of titanium in a mixed alcohol solution, adding an acetic acid-water solution of silver nitrate, adding sodium hydroxide to adjust the pH value in order to obtain a mixed solution, and carrying out a constant temperature reaction on the mixed solution in a reaction kettle to obtain a precipitate; and washing by using water and ethanol, and drying to obtain the Ag / AgCl / TiO2 heterostructure nano-material. The ~20nm Ag / AgCl / TiO2 heterostructure nano-material is prepared through controlling reaction conditions by adopting solvothermal, and has an excellent bacterium killing performance under the visible light The method has the advantages of simple preparation process, small use amount of silver, and practical application prospect.

Description

technical field [0001] The invention belongs to the fields of solar energy, environmental sanitation and photocatalytic materials, in particular to a silver / silver chloride and titanium dioxide composite heterostructure nanomaterial with excellent bactericidal performance under visible light and a preparation method thereof. Background technique [0002] TiO 2 It is an inorganic material that has been widely studied and applied. Its chemical properties are very stable and low in price. It has very good application prospects in the fields of photocatalytic removal of harmful microorganisms and organic matter in the environment, new solar cell electrodes, and hydrogen production by splitting water. However, pure TiO 2 Since the bandgap is wide (~3.2ev in the case of anatase), it can only be excited by ultraviolet light (~4%), which accounts for a small proportion of sunlight, and the photo-excited carriers are also easy to recombine, so Development of Visible Light Responsiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J27/10A01N59/16A01P1/00B82Y30/00
Inventor 张静涛石恒真韩冰刘炳坤李鹏举索新颖
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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