CN106859658A - The preparation of spinel-type Preen nono powder and its finger mark process for show - Google Patents
The preparation of spinel-type Preen nono powder and its finger mark process for show Download PDFInfo
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- CN106859658A CN106859658A CN201710078915.8A CN201710078915A CN106859658A CN 106859658 A CN106859658 A CN 106859658A CN 201710078915 A CN201710078915 A CN 201710078915A CN 106859658 A CN106859658 A CN 106859658A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/117—Identification of persons
- A61B5/1171—Identification of persons based on the shapes or appearances of their bodies or parts thereof
- A61B5/1172—Identification of persons based on the shapes or appearances of their bodies or parts thereof using fingerprinting
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Abstract
The present invention provides preparation and its finger mark process for show of spinel-type Preen nono powder, and the preparation method is comprised the following steps：S1, prepare titanium citrate it is molten should；S2, prepare cobalt/titanium citrate sol；S3, prepare cobalt/titanium citrate xerogel；S4, Muffle furnace calcining.Finger mark process for show of the invention, including aobvious method is directly brushed, aobvious method and the aobvious method of suspension spray are trembled in dusting.The present invention has following Advantageous Effects：It is good to the fingerprint displaying effect in old impression of the hand and permeability object；Product possesses environmental protection feature, harmless to operator；Preparation method is simple and easy to apply, it is easy to popularization and application.
Description
Technical field
The present invention relates to public security criminal technique finger mark identification field, more particularly to spinel-type Preen nono powder preparation
And its finger mark process for show.
Background technology
Impression of the hand is human contact's object and in the reflecting image of contact surface surface structure left by body surface；And finger
Line has people variant, the characteristics of being basically unchanged throughout one's life.Therefore, it can directly assert individual according to impression of the hand.In solving criminal cases and
Impression of the hand can be played and provide the important function that evidence was solved a case and tried to investigation clue, offer in trial.As can be seen here, latent fingerprint
Appearing technique is the precondition and guarantee for being disclosed and being confirmed crime using impression of the hand.At present, powder method and small-particle suspension method are because of behaviour
Make simple, preparation simple, impression of the hand most efficient method is manifested as scene.Then, powder conventional at present, such as bronze, magnetic
Powder etc. is larger because of particle diameter, it is impossible to fully combined with impression of the hand material, therefore the impression of the hand in old impression of the hand and permeability object is shown
Existing effect on driving birds is not good.To improve the sensitivity of finger mark detection, researcher utilizes some semiconductor nanos（Quantum dot）, rare earth material
Manifest potential impression of the hand Deng as fluorometric reagent, though obtaining better effects, how toxic such reagent is, and need to be set by means of complexity
Standby, operation sequence is cumbersome, is not easy to the popularization of engineering department of basic unit.Also there are the noble metal nanometer materials such as partial report gold, silver can
The sensitivity that Bio-imprinting manifests, but the method high cost are improved, laboratory stage is currently limited to.
It can be seen that, in existing finger mark appearing technique, there is problems with：
1st, conventional powder method is to the fingerprint displaying effect on driving birds is not good in old impression of the hand and permeability object.
2nd, semiconductor nano（Quantum dot）Or rare earth material is toxic, and need to by means of complex device, operation sequence compared with
It is cumbersome, it is not easy to the popularization of engineering department of basic unit.
3rd, the noble metal nanometer material high cost such as gold, silver, is currently limited to laboratory stage.
The content of the invention
In order to solve that existing conventional powder method is present to the fingerprint displaying effect in old impression of the hand and permeability object
Not good problem, the present invention proposes preparation and its finger mark process for show of spinel-type Preen nono powder.
The preparation of spinel-type Preen nono powder of the present invention, comprises the following steps：
S1, the citrate for preparing titanium are molten：40.66g citric acids are dissolved in 100ml deionized waters, are added in there-necked flask, it is acute
Strong stirring is simultaneously heated to 85 DEG C, is completely dissolved to citric acid, and the titanium of 2mol/L is slowly added dropwise in the citric acid solution for preparing
The ethanol solution of sour four butyl esters, forms white precipitate, continues stirring to white and disappears, and forms the citric acid of transparent, clarification titanium
Salting liquid；
S2, prepare cobalt/titanium citrate sol：30.82g cobalt nitrates and 81.39g citric acids are added prepared by step S1
Titanium-citrate solution, is 6 using ammoniacal liquor regulation pH, adds 3.10g ethylene glycol, and does not stop stirring at 95 DEG C, makes cobalt/titanium
Citrate gradually forms stable sol；
S3, prepare cobalt/titanium citrate xerogel：By the cobalt obtained by step S2/titanium citrate sol dehydration shape at room temperature
Into xerogel；
S4, Muffle furnace calcining：By the cobalt obtained by step S3/titanium citrate xerogel it is finely ground, drying after, in Muffle furnace in
300 DEG C of pre-burnings 30 minutes, form powder precursor；Precursor is carried out into second calcination 100 minutes at 900 DEG C, point is obtained brilliant
Stone-type Preen nono powder Co2TiO4。
Present invention additionally comprises the finger mark process for show of above-mentioned spinel-type Preen nono powder, including aobvious method is directly brushed, spread
Powder trembles aobvious method and the aobvious method of suspension spray.
Further, described directly brush shows method, including, appropriate spinel-type Preen nono powder is dipped with fingerprint brush,
Swept from the bottom up along vertical roofing, powder is adhered to object plane, after streakline is seen, the powder that hair loss is painted is played, with hair
Brush aobvious along a direction brush along the flow direction of streakline, until streakline is clear, this method is applied on smooth impermeability object dives
In manifesting for impression of the hand.
Further, aobvious method is trembled in the dusting, including, appropriate spinel-type Preen nono powder is dipped with fingerprint brush,
Attack brush holder makes powder be covered in object plane；Then both hands hold two relative edges of object makes it shake up and down, allows powder to streak doubtful
There is the object plane of impression of the hand, you can show impression of the hand, excessive powder is withdrawn into container, then gently the attack object back side is shaked off and floats on small plough
Powder in ditch, this method is applied to permeability or the semipermeability objects such as paper, true qualities wood.
Further, the aobvious method of suspension spray：Comprise the following steps：
S1, suspension preparation：First the surfactant 1227 of 0.5g is dissolved in 50 mL deionized waters, stirring to surface is lived
After property agent 1227 is completely dissolved, the spinel-type Preen nono powder Co of 5g is added2TiO4With 50 mL deionized waters, stirring
Until powder be uniformly dispersed, it is not stratified；
S2, spray are aobvious：Carrying out spraying aobvious at blood latent fingerprint 20cm with the spray bottle equipped with suspension, solution is fully connect with sample
Touch, observed again after slowly being rinsed with clear water after 30s and manifest effect, repeated if effect on driving birds is not good, until showing preferable effect
Sample is dried up with hair dryer after fruit.
Spinel-type Preen nono powder prepared by this method has certain dispersiveness in organic phase, is remained with impression of the hand
Thing binding ability is stronger；Its particle diameter is small, good with impression of the hand residue adhesiveness in nanoscale；And this compound is due to selection
Property it is high, only with impression of the hand streakline on grease or hemoglobin occur adhesive attraction, the effect of handprint images ambient interferences can be reduced
Really, contrast is strengthened.Although powder is made up of metallic elements such as titanium, cobalts, the two has formed metal by high temperature sintering
Will not be separated out under ion solid solution, normal temperature and pressure, therefore possess environmental protection feature, it is harmless to operator.Therefore the present invention has
Following Advantageous Effects：
1st, it is good to the fingerprint displaying effect in old impression of the hand and permeability object.
2nd, product possesses environmental protection feature, harmless to operator.
3rd, preparation method is simple and easy to apply, it is easy to popularization and application.
Brief description of the drawings
Fig. 1 is the X-ray diffraction spectrogram of the spinel-type Preen nono powder prepared by the present invention.
Fig. 2 is the transmission electron microscope picture of the spinel-type Preen nono powder prepared by the present invention.
Fig. 3 is the elementary analysis figure of the spinel-type Preen nono powder prepared by the present invention.
Fig. 4 is that the spinel-type Preen nono powder prepared by the present invention manifests design sketch for diving hand print with perspiration on paper.
Fig. 5 is that the spinel-type Preen nono powder prepared by the present invention manifests design sketch for diving hand print with perspiration on glass.
Fig. 6 is that the spinel-type Preen nono powder prepared by the present invention manifests design sketch for blood latent fingerprint on paper.
Fig. 7 is that the spinel-type Preen nono powder prepared by the present invention manifests design sketch for blood latent fingerprint on glass.
Specific embodiment
Fig. 1 is the X-ray diffraction spectrogram of the spinel-type Preen nono powder prepared by the present invention, and the figure shows that its is main
Crystal face characteristic diffraction peak and standard card JCPDS:39-1410 is completely the same.
Fig. 2 is the transmission electron microscope picture of the spinel-type Preen nono powder prepared by the present invention.The prepared powder of display
Particle diameter is mainly distributed on 20-40 rans, and dispersiveness is preferably.
Fig. 3 is the elementary analysis figure of the spinel-type Preen nono powder prepared by the present invention.Show powder by cobalt, titanium,
Three kinds of element compositions of oxygen, compositional purity is high, free from admixture.
Fig. 4 is that the spinel-type Preen nono powder prepared by the present invention manifests design sketch for diving hand print with perspiration on paper,
Fig. 5 is that the spinel-type Preen nono powder prepared by the present invention manifests design sketch for diving hand print with perspiration on glass, and Fig. 6 is
Spinel-type Preen nono powder prepared by the present invention is used for blood latent fingerprint on paper and manifests design sketch, and Fig. 7 is institute of the present invention
The spinel-type Preen nono powder of preparation is used for blood latent fingerprint on glass and manifests design sketch.From Fig. 4-Fig. 7：Institute of the present invention
The effect that the cobalt of preparation/aluminium composite nanometre powder manifests outmoded finger mark is good, and its finger mark mastoid process streakline is smooth, and spillikin, dot etc. are thin
Section feature is protruded, and reagent is shown better than traditional powder.
Embodiment 1：
The preparation of spinel-type Preen nono powder, comprises the following steps：
S1, to prepare titanium-citrate molten：40.66g citric acids are dissolved in 100ml deionized waters, are added in there-necked flask, it is acute
Strong stirring is simultaneously heated to 85 DEG C, is completely dissolved to citric acid, and the titanium of 2mol/L is slowly added dropwise in the citric acid solution for preparing
The ethanol solution of sour four butyl esters, forms white precipitate, continues stirring to white and disappears, and forms the titanium-citrate of transparent clarification
Solution；
S2, prepare cobalt/titanium citrate sol：30.82g cobalt nitrates and 81.39g citric acids are added prepared by step S1
Titanium-citrate solution, is 6 using ammoniacal liquor regulation pH, adds 3.10g ethylene glycol, and does not stop stirring at 95 DEG C, makes cobalt/titanium
Citrate gradually forms stable sol；
S3, prepare cobalt/titanium citrate xerogel：By the cobalt obtained by step S2/titanium citrate sol dehydration shape at room temperature
Into xerogel；
S4, Muffle furnace calcining：By the cobalt obtained by step S3/titanium citrate xerogel it is finely ground, drying after, in Muffle furnace in
300 DEG C of pre-burnings 30 minutes, form powder precursor；Precursor is carried out into second calcination 100 minutes at 900 DEG C, point is obtained brilliant
Stone-type Preen nono powder Co2TiO4。
Embodiment 2：
By the finger mark process for show of the spinel-type Preen nono powder obtained by the present invention：
Directly brush aobvious method：Appropriate powder is dipped with fingerprint brush, is swept from the bottom up along vertical roofing, powder is adhered to thing
Face, after streakline is seen, plays the powder that hair loss is painted, and the flow direction along streakline is aobvious along a direction brush, until streakline is clear.
Embodiment 3：
By the finger mark process for show of the spinel-type Preen nono powder obtained by the present invention：
Aobvious method is trembled in dusting：Appropriate powder is dipped with fingerprint brush, attack brush holder makes powder be covered in object plane；Then both hands are held
Two relative edges of object make it shake up and down, allow powder to streak the object plane for being suspected to have impression of the hand, you can to show impression of the hand.By excessive powder
Container is withdrawn, then gently the powder floated in small ditch dug with a plow is shaked off at the attack object back side.
Embodiment 4：
By the finger mark process for show of the spinel-type Preen nono powder obtained by the present invention：
The aobvious method of suspension spray：Comprise the following steps：
S1, suspension preparation：First the surfactant 1227 of 0.5g is dissolved in 50 mL deionized waters, stirring to surface is lived
After property agent 1227 is completely dissolved, the spinel-type Preen nono powder Co of 5g is added2TiO4With 50 mL deionized waters, stirring
Until powder be uniformly dispersed, it is not stratified.
S2, spray are aobvious：Carrying out spraying aobvious at blood latent fingerprint 20cm with the spray bottle equipped with suspension, solution is filled with sample
Tap is touched, and is observed again after slowly being rinsed with clear water after 30s and is manifested effect, is repeated if effect on driving birds is not good, until showing reason
Sample is dried up with hair dryer after thinking effect.
Spinel-type Preen nono powder prepared by this method can fast and efficiently manifest outmoded finger mark.The preparation method
It is simple for process；Its particle diameter is small, good with impression of the hand residue adhesiveness in nanoscale；And this compound is due to selectivity
Height, only with impression of the hand streakline on grease or hemoglobin occur adhesive attraction, the effect of handprint images ambient interferences can be reduced,
Enhancing contrast, so to the good developing effect of outmoded finger mark.Although powder is made up of metallic elements such as titanium, cobalts, the two
By high temperature sintering, formed and will not separate out under metal ion solid solution, normal temperature and pressure, therefore possessed environmental protection feature, it is right
Operator is harmless.
Finally, in addition it is also necessary to it is noted that listed above is only several specific embodiments of the invention.Obviously, this hair
Bright to be not limited to above example, one of ordinary skill in the art can directly derive from present disclosure or associate
All technical schemes, are considered as within protection scope of the present invention.
Claims (5)
1. a kind of preparation method of spinel-type Preen nono powder, it is characterised in that comprise the following steps：
S1, the citrate for preparing titanium are molten：40.66g citric acids are dissolved in 100ml deionized waters, are added in there-necked flask, it is acute
Strong stirring is simultaneously heated to 85 DEG C, is completely dissolved to citric acid, and the titanium of 2mol/L is slowly added dropwise in the citric acid solution for preparing
The ethanol solution of sour four butyl esters, forms white precipitate, continues stirring to white and disappears, and forms the citric acid of transparent, clarification titanium
Salting liquid；
S2, prepare cobalt/titanium citrate sol：30.82g cobalt nitrates and 81.39g citric acids are added prepared by step S1
Titanium-citrate solution, is 6 using ammoniacal liquor regulation pH, adds 3.10g ethylene glycol, and does not stop stirring at 95 DEG C, makes cobalt/titanium
Citrate gradually forms stable sol；
S3, prepare cobalt/titanium citrate xerogel：By the cobalt obtained by step S2/titanium citrate sol dehydration shape at room temperature
Into xerogel；
S4, Muffle furnace calcining：By the cobalt obtained by step S3/titanium citrate xerogel it is finely ground, drying after, in Muffle furnace in
300 DEG C of pre-burnings 30 minutes, form powder precursor；Precursor is carried out into second calcination 100 minutes at 900 DEG C, point is obtained brilliant
Stone-type Preen nono powder Co2TiO4。
2. a kind of finger mark process for show, it is characterised in that the spinel-type green prepared using preparation method described in claim 1
Nanometer powder carries out finger mark to be manifested, including directly brushes aobvious method, and aobvious method and the aobvious method of suspension spray are trembled in dusting.
3. finger mark process for show according to claim 2, it is characterised in that described directly to brush aobvious method, including, with fingerprint hair
Brush dips appropriate spinel-type Preen nono powder, is swept from the bottom up along vertical roofing, powder is adhered to object plane, when seeing
To after streakline, the powder that hair loss is painted is played, the flow direction with hairbrush along streakline brushes aobvious along a direction, until streakline is clear,
This method is applied to potential impression of the hand on smooth impermeability object and manifests.
4. finger mark process for show according to claim 2, it is characterised in that：Aobvious method is trembled in the dusting, including, with fingerprint hair
Brush dips appropriate spinel-type Preen nono powder, and attack brush holder makes powder be covered in object plane；Then both hands hold two, object
Relative edge makes it shake up and down, allows powder to streak the object plane for being suspected to have impression of the hand, you can to show impression of the hand, excessive powder is withdrawn and is held
Device, then gently the powder floated in small ditch dug with a plow is shaked off at the attack object back side, this method is applied to the permeability such as paper, true qualities wood
Or semipermeability object.
5. finger mark process for show according to claim 2, it is characterised in that the aobvious method of suspension spray：Including following step
Suddenly：
S1, suspension preparation：First the surfactant 1227 of 0.5g is dissolved in 50 mL deionized waters, stirring to surface is lived
After property agent 1227 is completely dissolved, the spinel-type Preen nono powder Co of 5g is added2TiO4With 50 mL deionized waters, stirring
Until powder be uniformly dispersed, it is not stratified；
S2, spray are aobvious：Carrying out spraying aobvious at blood latent fingerprint 20cm with the spray bottle equipped with suspension, solution is fully connect with sample
Touch, observed again after slowly being rinsed with clear water after 30s and manifest effect, repeated if effect on driving birds is not good, until showing preferable effect
Sample is dried up with hair dryer after fruit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710078915.8A CN106859658A (en) | 2017-02-14 | 2017-02-14 | The preparation of spinel-type Preen nono powder and its finger mark process for show |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710078915.8A CN106859658A (en) | 2017-02-14 | 2017-02-14 | The preparation of spinel-type Preen nono powder and its finger mark process for show |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108359270A (en) * | 2018-02-13 | 2018-08-03 | 华北水利水电大学 | Ultra-fine Preen nono ceramic paint of spinel-type and preparation method thereof |
| CN111599966A (en) * | 2020-05-29 | 2020-08-28 | 犀望新能源科技（昆山）有限公司 | Lithium battery diaphragm material and preparation method and application thereof |
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| JP2001295037A (en) * | 2000-04-17 | 2001-10-26 | Hitachi Ltd | Sputtering target |
| CN103788717A (en) * | 2014-01-18 | 2014-05-14 | 南京理工大学 | Composite oxide coated mica pearled composite pigment and preparation method thereof |
| CN103908260A (en) * | 2014-01-16 | 2014-07-09 | 中国刑事警察学院 | Latent fingerprint displaying method |
| CN105047904A (en) * | 2015-06-17 | 2015-11-11 | 中国矿业大学 | Preparation method and application of titanium-cobalt spinel |
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2017
- 2017-02-14 CN CN201710078915.8A patent/CN106859658A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001295037A (en) * | 2000-04-17 | 2001-10-26 | Hitachi Ltd | Sputtering target |
| CN103908260A (en) * | 2014-01-16 | 2014-07-09 | 中国刑事警察学院 | Latent fingerprint displaying method |
| CN103788717A (en) * | 2014-01-18 | 2014-05-14 | 南京理工大学 | Composite oxide coated mica pearled composite pigment and preparation method thereof |
| CN105047904A (en) * | 2015-06-17 | 2015-11-11 | 中国矿业大学 | Preparation method and application of titanium-cobalt spinel |
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| 彭迪: "《钴绿小颗粒悬浮液显现血手印的研究》", 《刑事技术》 * |
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| 王海峰: "《钛钴尖晶石颜料制备与性能研究》", 《万方数据知识服务平台学位》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108359270A (en) * | 2018-02-13 | 2018-08-03 | 华北水利水电大学 | Ultra-fine Preen nono ceramic paint of spinel-type and preparation method thereof |
| CN111599966A (en) * | 2020-05-29 | 2020-08-28 | 犀望新能源科技（昆山）有限公司 | Lithium battery diaphragm material and preparation method and application thereof |
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Application publication date: 20170620 |