CN106883829B - A kind of regulatable TiO2Composite aqueous nano-fluid of-Au and preparation method thereof - Google Patents
A kind of regulatable TiO2Composite aqueous nano-fluid of-Au and preparation method thereof Download PDFInfo
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- CN106883829B CN106883829B CN201710262104.3A CN201710262104A CN106883829B CN 106883829 B CN106883829 B CN 106883829B CN 201710262104 A CN201710262104 A CN 201710262104A CN 106883829 B CN106883829 B CN 106883829B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
- C09K5/14—Solid materials, e.g. powdery or granular
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
Abstract
The present invention provides a kind of regulatable TiO2Composite aqueous nano-fluid of-Au and preparation method thereof realizes the compound of different-effect by the volume ratio (1:1 ~ 1:20) of regulation titanium trichloride solution and the gold nano fluid of different quality containing (0.006% ~ 0.05%).When the volume ratio of gold nano fluid that titanium trichloride solution and mass fraction are 0.01% is 1:5, after being reacted 24 hours at 180 DEG C, being formed by nano-fluid can be stabilized 15 days, and the thermal coefficient of thermal conductivity ratio water improves 48.37%, than the Au nano-fluid and TiO of one-component216.01% and 35.15% is respectively increased in nano-fluid.Composite aqueous Thermal Conductivity of Nanofluids prepared by the present invention is high, and suspension stability is good and simple process, expands application range of the nano-fluid in heat-exchange system.
Description
Technical field
The present invention relates to a kind of regulatable TiO2Composite aqueous nano-fluid of-Au and preparation method thereof, as a kind of high
Effect heat transferring medium is applied in field of heat exchange.
Technical background
Heat exchange equipment is widely used in oil refining, chemical industry, light industry, pharmacy, machinery, food as a kind of energy conversion device
In processing, power and atomic energy industry department.The application of heat exchange equipment is so extensive, its heat transfer efficiency directly influences
The utilization rate of energy in whole system, and the heating conduction of heat transfer medium be heat exchanger heat-transfer performance size it is decisive because
Element.So improving the heating conduction of heat transfer medium, energy utilization rate is improved, is only and is realized energy-saving and emission-reduction, protects the most main of environment
Want approach.In field of heat transfer, the goal in research of nano-fluid is to obtain highest with the smallest concentration and most stable of suspended particles
Possible heat transfer property.Currently, the type of liquid heat-transfer medium is mainly based on water and ethylene glycol, and component is more single,
It is difficult to meet the condition that ideal nano-fluid should have, such as: high heat conductance, low stickiness, good stability and compatibility,
And it is relatively cheap.Titanium dioxide thermal coefficient with higher, heat transfer is good, with nontoxic, practical and raw material is easy to get at a low price
Advantage prepares nano-fluid so nano-titanium dioxide is evenly spread in water, to improve the research of system heating conduction very
It is valuable.The thermal coefficient of Au nano-fluid at room temperature is preferable, than other heat exchange property at very low concentrations
Working fluid is much better under relatively high concentration, therefore has received widespread attention.But nanogold is relatively expensive and has
Very high surface-active is easy to happen reunion in the more situation of additive amount and even settles.Therefore, by TiO2Nano-fluid with
Water base Au nano-fluid is mixed to prepare composite Nano fluid by corresponding proportion to expand application range.Composite Nano fluid due to
There is special contact interface, mutual physics and chemical property significant difference between its each component, thus constitute a uniqueness, more
The composite system of function, Modulatory character energy.The preparation of nano-fluid and characteristic are still in conceptual phase, are entering industrial application
It needs to optimize various factors before, it is novel that the preparation of composite nano materials is likely to become to enhancing in conjunction with nano-fluid property
One of the effective way of heat-exchange working medium efficiency, to make new and effective nano-fluid in solar energy thermal-power-generating, industrial afterheat recovery
Equal heat accumulations field of heat transfer plays significant role.
Summary of the invention
It is molten by changing titanium trichloride the purpose of the invention is to overcome above-mentioned one-component nano-fluid Shortcomings
The volume ratio of liquid and water base Au nano-fluid, to obtain thermal coefficient height, suspension stability is good and the composite Nano of simple process
Fluid.
To achieve the purpose of the present invention, technical scheme is as follows:
A kind of regulatable TiO2The composite aqueous nano-fluid of-Au: (1) Au nano-solution with appropriate amount of deionized water is mixed
It closes, stirs evenly and Au nano-fluid is made in ultrasonic vibration；(2) at normal temperature, titanium trichloride solution is delayed according to a certain volume
Slowly it is added drop-wise in the Au nano-fluid of (1) formation, after mixing evenly, is put into reaction kettle, when reacting one section at a certain temperature
Between after, respectively wash 3 times with deionized water and alcohol and obtain the solution of composite nanometer particle, by the gained solution drying after, obtain
TiO2- Au composite nanometer particle；(3) TiO in step (2)2- Au composite nanometer particle is add to deionized water, ultrasound vibration
Dynamic obtained composite Nano fluid.
The shape of Au particle of the present invention is spherical shape, and partial size is 6 ~ 10nm.
The concentration of Au nano-solution used in step (1) of the present invention is 0.2g/L.
The ultrasonic vibration time is 1 ~ 5 hour in step (1) of the present invention.
In being made in step (1) of the present invention in Au nano-fluid the mass fraction of Au nano particle be 0.006% ~
0.05%。
Titanium trichloride solution Ti content is 14.5% in step (2) of the present invention.
The volume ratio of titanium trichloride solution and Au nano-fluid is 1:1 ~ 1:20 in step (2) of the present invention.
Mixing time is 30 ~ 90 minutes in step (2) of the present invention.
Step (2) reaction temperature of the present invention is 160 ~ 200 DEG C, the reaction time 24 ~ 36 hours.Drying temperature is 80
℃。
TiO is formed in step (2) of the present invention2The shape of nano particle is rodlike (length is 150nm ~ 300nm).It is logical
Control reaction temperature and time are spent to regulate and control to generate TiO2The length of nanometer rods.
Detailed description of the invention
Fig. 1 is TiO formed in step (3)2The composite aqueous nano-fluid schematic diagram of-Au.Wherein: 1, gold nano
Grain；2, TiO2Nanometer rods；3, hydrone.
Specific embodiment
Embodiment 1
The Au nano-solution of 0.2g/L is mixed with deionized water, so that Au nano-particle content is 0.006%, ultrasound vibration
Move 3 hours obtained Au nano-fluids.Under room temperature, titanium trichloride solution and this nano-fluid are mixed by the volume ratio of 1:3, stirred
It mixes 20 minutes.It after uniformly, is put into reaction kettle, 24 hours is reacted at 160 DEG C.Acquired solution water and alcohol are respectively washed 3 times
After dry.Deionized water is added, Au nano-particle content is made still to be maintained 0.006%.Being formed by nano-fluid can be stabilized
34 days, the thermal coefficient of thermal conductivity ratio water improved 28.51%, than one-component homogenous quantities score Au nano-fluid and
TiO26.73% and 15.78% is respectively increased in nano-fluid.
Embodiment 2
The Au nano-solution of 0.2g/L is mixed with deionized water, so that Au nano-particle content is 0.006%, ultrasound vibration
Move 3 hours obtained Au nano-fluids.Under room temperature, titanium trichloride solution and this nano-fluid are mixed by the volume ratio of 1:3, stirred
It mixes 20 minutes.It after uniformly, is put into reaction kettle, 24 hours is reacted at 200 DEG C.Acquired solution water and alcohol are respectively washed 3 times
After dry.Deionized water is added, Au nano-particle content is made still to be maintained 0.006%.Being formed by nano-fluid can be stabilized
27 days, the thermal coefficient of thermal conductivity ratio water improved 33.53%, than one-component homogenous quantities score Au nano-fluid and
TiO28.69% and 21.38% is respectively increased in nano-fluid.
Embodiment 3
The Au nano-solution of 0.2g/L is mixed with deionized water, so that Au nano-particle content is 0.01%, ultrasonic vibration
5 hours obtained Au nano-fluids.Under room temperature, titanium trichloride solution and this nano-fluid are mixed by the volume ratio of 1:5, stirring
40 minutes.It after uniformly, is put into reaction kettle, 24 hours is reacted at 180 DEG C.After acquired solution water and alcohol respectively wash 3 times
Drying.Deionized water is added, Au nano-particle content is made still to be maintained 0.01%.Being formed by nano-fluid can be stabilized
15 days, the thermal coefficient of thermal conductivity ratio water improved 48.37%, than the Au nano-fluid and TiO of one-component2Nano-fluid
16.01% and 35.15% is respectively increased.
Embodiment 4
The Au nano-solution of 0.2g/L is mixed with deionized water, so that Au nano-particle content is 0.05%, ultrasonic vibration
7 hours obtained Au nano-fluids.Under room temperature, titanium trichloride solution and this nano-fluid are mixed by the volume ratio of 1:7, stirring
60 minutes.It after uniformly, is put into reaction kettle, 36 hours is reacted at 200 DEG C.After acquired solution water and alcohol respectively wash 3 times
Drying.Deionized water is added, Au nano-particle content is made still to be maintained 0.05%.20 can be stabilized by being formed by nano-fluid
It, the thermal coefficient of thermal conductivity ratio water improves 50.53%, than the Au nano-fluid and TiO of one-component2Nano-fluid point
Indescribably high 23.56% and 39.55%.
Claims (2)
1. a kind of regulatable TiO2The composite aqueous nano-fluid preparation method of-Au, which comprises the steps of:
(1) Au nano-solution is mixed with appropriate amount of deionized water, Au nano-fluid is made in ultrasonic vibration；(2) at normal temperature, by one
The titanium trichloride solution for determining volume is slowly dropped in the Au nano-fluid of (1) formation, and example mixes according to a certain volume, and stirring is equal
After even, be put into reaction kettle, after reacting a period of time at a certain temperature, respectively washed with deionized water and alcohol obtain for 3 times it is compound
The solution of nano particle obtains TiO after the drying of the gained solution2- Au composite nanometer particle；(3) in step (2)
TiO2- Au composite nanometer particle is add to deionized water, and composite Nano fluid is made in ultrasonic vibration；
The ultrasonic vibration time is 1 ~ 5 hour in the step (1)；
The mass fraction that Au nano particle in middle Au nano-fluid is made in the step (1) is 0.006% ~ 0.05%；
Titanium trichloride solution Ti content is 14.5% in the step (2)；
The volume ratio of titanium trichloride solution and Au nano-fluid is 1:1 ~ 1:20 in the step (2)；
Mixing time is 30 ~ 90 minutes in the step (2)；
Step (2) reaction temperature is 160 ~ 200 DEG C, and the reaction time 24 ~ 36 hours, drying temperature was 80 DEG C；
TiO is formed in the step (2)2The shape of nano particle be it is rodlike, length be 150nm ~ 300nm, pass through control reaction temperature
Degree and the time come regulate and control generate TiO2The length of nanometer rods；
The shape of the Au particle is spherical shape, and partial size is 6 ~ 10nm;The concentration of Au nano-solution used is 0.2g/L.
2. regulatable TiO as claimed in claim 12The nanometer stream that the composite aqueous nano-fluid preparation method of-Au obtains
Body, which is characterized in that the composite Nano fluid additive is the mixture of titanium dioxide and gold particle.
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| CN108529610B (en) * | 2018-03-08 | 2021-03-02 | 济南大学 | GO-TiO2Nano-rod composite nano-particle and preparation method thereof |
| CN109999773A (en) * | 2019-04-18 | 2019-07-12 | 河南师范大学 | A kind of preparation method of efficient liquid phase TiO2 photochemical catalyst |
| US11866610B2 (en) | 2022-01-31 | 2024-01-09 | Kuwait Institute For Scientific Research | Tablet-based method of producing nano/micro particle water suspensions and carbon dioxide gas |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103102871A (en) * | 2011-11-15 | 2013-05-15 | 黄彦豪 | Heat transfer efficiency improving accelerator |
| CN104229878A (en) * | 2014-09-02 | 2014-12-24 | 陈立晓 | Preparation method of rutile crystal-form titanium dioxide nanorod |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103102871A (en) * | 2011-11-15 | 2013-05-15 | 黄彦豪 | Heat transfer efficiency improving accelerator |
| CN104229878A (en) * | 2014-09-02 | 2014-12-24 | 陈立晓 | Preparation method of rutile crystal-form titanium dioxide nanorod |
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