CN108855175A - A kind of formaldehyde light cleanser of neutrality and preparation method thereof - Google Patents
A kind of formaldehyde light cleanser of neutrality and preparation method thereof Download PDFInfo
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- CN108855175A CN108855175A CN201710338018.6A CN201710338018A CN108855175A CN 108855175 A CN108855175 A CN 108855175A CN 201710338018 A CN201710338018 A CN 201710338018A CN 108855175 A CN108855175 A CN 108855175A
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 148
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 claims abstract description 36
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 13
- 239000010439 graphite Substances 0.000 claims abstract description 13
- 230000007935 neutral effect Effects 0.000 claims abstract description 11
- QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000001354 calcination Methods 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 claims description 20
- 238000002791 soaking Methods 0.000 claims description 15
- 238000000498 ball milling Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 4
- 238000002604 ultrasonography Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- 238000010792 warming Methods 0.000 claims description 2
- 238000004321 preservation Methods 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 5
- 238000013033 photocatalytic degradation reaction Methods 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 239000003599 detergent Substances 0.000 abstract description 3
- 239000002270 dispersing agent Substances 0.000 abstract description 2
- 230000002045 lasting effect Effects 0.000 abstract description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 9
- 230000001699 photocatalysis Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 5
- 229930040373 Paraformaldehyde Natural products 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 229920002866 paraformaldehyde Polymers 0.000 description 4
- 239000011941 photocatalyst Substances 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- KEQXNNJHMWSZHK-UHFFFAOYSA-L 1,3,2,4$l^{2}-dioxathiaplumbetane 2,2-dioxide Chemical compound [Pb+2].[O-]S([O-])(=O)=O KEQXNNJHMWSZHK-UHFFFAOYSA-L 0.000 description 3
- 238000000026 X-ray photoelectron spectrum Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000007146 photocatalysis Methods 0.000 description 3
- 238000002835 absorbance Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000000638 stimulation Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 206010010741 Conjunctivitis Diseases 0.000 description 1
- 206010011224 Cough Diseases 0.000 description 1
- 208000000059 Dyspnea Diseases 0.000 description 1
- 206010013975 Dyspnoeas Diseases 0.000 description 1
- 206010019233 Headaches Diseases 0.000 description 1
- 241000446313 Lamella Species 0.000 description 1
- 206010028813 Nausea Diseases 0.000 description 1
- 208000036071 Rhinorrhea Diseases 0.000 description 1
- 206010039101 Rhinorrhoea Diseases 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 208000026935 allergic disease Diseases 0.000 description 1
- 208000006673 asthma Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 206010006451 bronchitis Diseases 0.000 description 1
- 210000003169 central nervous system Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 210000000795 conjunctiva Anatomy 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000002255 enzymatic effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 210000000987 immune system Anatomy 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 210000004185 liver Anatomy 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 210000000653 nervous system Anatomy 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000006385 ozonation reaction Methods 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
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- 239000012629 purifying agent Substances 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 210000001533 respiratory mucosa Anatomy 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/24—Nitrogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
-
- B01J35/39—
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- B01J35/615—
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/70—Non-metallic catalysts, additives or dopants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/80—Type of catalytic reaction
- B01D2255/802—Photocatalytic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/704—Solvents not covered by groups B01D2257/702 - B01D2257/7027
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
Abstract
The invention belongs to light cleanser field of material technology, disclose a kind of formaldehyde light cleanser and preparation method thereof of neutrality.Preparation method of the present invention includes the following steps：S1. dicyandiamide is calcined in 500~650 DEG C, obtains graphite phase carbon nitride；S2. graphite phase carbon nitride is pulverized, is calcined again for 400~550 DEG C under air atmosphere, obtains carbonitride；S3. neutral formaldehyde light cleanser will in carbonitride disperse water, be obtained.Preparation method of the present invention is easy to operate, and obtained formaldehyde light cleanser activity is high, has biggish specific surface area (170.2m2/ g), it is possible to provide more reaction sites have stronger absorption to the light of 200~1100nm wave band, have stronger photocatalytic degradation detergent power under the irradiation of visible light, are used for Photo-Catalytic Degradation of Formaldehyde, degradable 61% formaldehyde in 16 hours.And dispersing agent is neutral water, use is safer, and dispersibility is stablized lasting.
Description
Technical field
The invention belongs to light cleanser field of material technology, in particular to the formaldehyde light cleanser of a kind of neutrality and its preparation
Method.
Background technique
Formaldehyde is a kind of most simple, most common aldehyde material.Home interior formaldehyde gas be mainly derived from burning cigarette,
Ornament materials and some textiles.Formaldehyde has biggish toxic action to human body.The stimulation of formaldehyde will lead to some acute symptoms,
Such as headache discomfort, sheds tears, sneezes, coughing, nausea, expiratory dyspnea.Long term can then induce the disease of multiple systems.
It is new studies have shown that formaldehyde can cause changing for central nervous system, the change of internal enzymatic activity and endocrine-immune system
Become.The formaldehyde of high concentration is all toxic for nervous system, immune system, liver.Stimulation eye conjunctiva, respiratory mucosa and generate
It sheds tears, runny nose, causes conjunctivitis, sphagitis, asthma, bronchitis and allergic disease.
The method for handling indoor formaldehyde currently on the market mainly has absorption method, Ozonation, photocatalytic oxidation and gold
Belong to oxidizing process.Wherein the light cleanser of photocatalytic oxidation preparation is with TiO2Based on, this is because TiO2Active high, heat
Stability is good, duration is long, the features such as cheap, harmless.But TiO2Light induced electron and hole be easy to happen it is multiple
It closes, photocatalysis efficiency is low, greater band gap (about 3.2eV), photochemical activity can only be shown in ultra-violet (UV) band, to the utilization rate of solar energy
Less than 5%.
In recent years, it is graphitized carbonitride (g-C3N4) people are caused due to its class carbon structure and good photocatalysis performance
Extensive concern.g-C3N4It is a kind of organic semiconducting materials, forbidden bandwidth about 2.7eV has suitable conduction band valence band location,
It can be seen that from the topological structure of skeleton, ideal g-C3N4It should be the C of N connection3N3Aromatic rings, similar graphene form two dimension altogether
The planar structure of yoke can verify that such structure from XRD, SEM, TEM.Its unique structure and high extent of polymerization make it have
Higher thermal stability, higher light utilization efficiency and photocatalytic activity, can to prepare that the formaldehyde purifying agent of efficient stable provides
Energy.
And currently there are the most meta-acid of light cleanser or meta-alkalescence with increase light cleanser dispersion it is steady
Qualitative and formaldehyde removal effect, so that its application be made to there is certain harm.Therefore development good stability, activity are high and use relatively peace
Complete (solution partial neutral) light cleanser is following trend.
Summary of the invention
In order to overcome, above-mentioned prior art light cleanser light utilization efficiency is low, dispersion stabilization is poor, dispersion slant acidity
Or it is the shortcomings that hidden danger and insufficient caused by meta-alkalescence, the primary purpose of the present invention is that providing a kind of formaldehyde of neutrality
The preparation method of light cleanser.
Another object of the present invention is to provide the neutral formaldehyde light cleanser of above method preparation.Formaldehyde light of the present invention is net
Agent has higher dispersion stabilization, more strong light absorption and more superior photocatalytic activity.
The purpose of the present invention is realized by following proposal：
A kind of preparation method of the formaldehyde light cleanser of the high stability of neutrality, includes the following steps：
S1. dicyandiamide is calcined in 500~650 DEG C, obtains graphite phase carbon nitride (CN-D-1)；
S2. CN-D-1 is pulverized, is calcined again for 400~550 DEG C under air atmosphere, obtains carbonitride (CN-D-
2)；
S3. neutral formaldehyde light cleanser will in CN-D-2 disperse water, be obtained.
The temperature of calcining described in step S1 is 500~600 DEG C in one of the embodiments,.
The soaking time of calcining described in step S1 is 2~6 hours in one of the embodiments,.
The soaking time of calcining described in step S1 is 3~5 hours in one of the embodiments,.
The heating rate of calcining described in step S1 is 1~5 DEG C/min in one of the embodiments,.
The heating rate of calcining described in step S1 is 2~4 DEG C/min in one of the embodiments,.
The temperature calcined again described in step S2 in one of the embodiments, is 450~550 DEG C.
The soaking time calcined again described in step S2 in one of the embodiments, is 1~4 hour.
The heating rate calcined again described in step S2 in one of the embodiments, is 2~10 DEG C/min.
The heating rate calcined again described in step S2 in one of the embodiments, is 4~7 DEG C/min.
Calcining exposes sample sufficiently again described in step S2 in one of the embodiments,.
The mass ratio of carbonitride and water used is 1 in step S3 in one of the embodiments,:100~1:10000.
Dispersion described in step S3 can be stirring, ultrasound, ball milling or concussion in one of the embodiments,.
The neutral formaldehyde light cleanser that step S3 is obtained in one of the embodiments, will can make again after precipitating removal
With.Minimizing technology includes standing or being centrifuged removal.
Specifically, step S1 includes the following steps：Dicyandiamide is placed in crucible and is covered, Muffle furnace is put into, in 500~
It is calcined in 600 DEG C, soaking time is 3~5 hours, and heating rate is 2~4 DEG C/min, obtains graphite phase carbon nitride (CN-D-1).
Specifically, step S2 includes the following steps：CN-D-1 is pulverized, 450~550 are warming up in air atmosphere
It DEG C calcines again, keeps the temperature 1~4 hour, heating rate is 4~7 DEG C/min, obtains carbonitride.
Specifically, step S3 includes the following steps：By CN-D-2 and water in mass ratio 1:100~1:10000 mixing, use
Ultrasonic, broken, ball milling or the mode of stirring are dispersed, and jitter time is 0.5~36h, obtain neutral formaldehyde light cleanser.
The present invention also provides the formaldehyde light cleansers for the neutral high stability that the above method is prepared.Light of the present invention is net
Agent can be used for PARA FORMALDEHYDE PRILLS(91,95) and carry out light degradation.
The principle of the present invention is：
Dicyandiamide is formed carbonitride by high-temperature calcination polycondensation first by the present invention, is forged again under air atmosphere after cooling
It burns, its corrosion oxidation is made using oxygen the graphite phase carbon nitride of high-specific surface area, then be dispersed in water and obtain
The formaldehyde light cleanser of the high stability of property.
The present invention compared with the existing technology, has the following advantages and beneficial effect：
(1) the formaldehyde light cleanser that the present invention is prepared has biggish specific surface area (170.2m2/ g), it is possible to provide
More reaction sites have stronger photocatalytic degradation detergent power to the formaldehyde in air under the irradiation of visible light.
(2) the formaldehyde light cleanser dispersing agent that the present invention is prepared is neutral water, and use is safer, and dispersibility
It is lasting to stablize.
(3) preparation method of the invention is easy to operate, and obtained light cleanser activity is high.
(4) the formaldehyde light cleanser that the present invention is prepared is used for Photo-Catalytic Degradation of Formaldehyde, can drop in 16 hours
The formaldehyde of solution 61%.
(5) the formaldehyde light cleanser that the present invention is prepared has broader forbidden bandwidth, has stronger redox
Ability, so that the purification of PARA FORMALDEHYDE PRILLS(91,95) is more thorough.
Detailed description of the invention
Fig. 1 is the XPS spectrum figure of the C element of CN-D-2 made from embodiment 1.
Fig. 2 is the XPS spectrum figure of the O element of CN-D-2 made from embodiment 1.
Fig. 3 is the XPS spectrum figure of the N element of CN-D-2 made from embodiment 1.
Fig. 4 is the XRD diagram of CN-D-1, CN-D-2 prepared by embodiment 1.
Fig. 5 is the IR figure of CN-D-1, CN-D-2 prepared by embodiment 1.
Fig. 6 is the DRS figure of CN-D-1, CN-D-2 prepared by embodiment 1.
Fig. 7 is the graph of pore diameter distribution of CN-D-1, CN-D-2 prepared by embodiment 1.
Fig. 8 is the CN-D-2 formaldehyde photochemical catalyst prepared in embodiment 1 and two kinds of TiO2The absorbance of light cleanser 1#, 2#
Comparison diagram.
Specific embodiment
Below with reference to embodiment, the present invention is described in further detail, and embodiments of the present invention are not limited thereto.
Material involved in the following example can be obtained from commercial channel.
Embodiment 1
10g dicyandiamide is placed in crucible and is covered, is calcined in Muffle furnace, calcination temperature is 550 DEG C, soaking time 4
Hour, heating rate is 2.0 DEG C/min；It pulverizes after natural cooling, obtains graphite phase carbon nitride (CN-D-1), weigh 1.2g
It is contained in crucible and does not cover, and drawout, calcine again, calcination temperature is 500 DEG C, and soaking time is 3 hours, and heating rate is
5.0℃/min.High-specific surface area carbon nitride photocatalyst (CN-D-2) is obtained after natural cooling.0.1g CN-D-2 is weighed, is dispersed
It in 100mL water (about 100g), using clasmatosis crusher machine 0.5h, is then centrifuged using centrifuge, obtains milky suspension
Liquid, concentration are about 0.01wt%, and pH is about 6~7.
The photochemical catalyst being prepared in embodiment 1 is subjected to the characterization such as XPS, DRS, XRD, as a result such as FIG. 1 to FIG. 8 institute
Show.
Conclusion：It is the XPS figure of C, O, N of CN-D-2 respectively shown in FIG. 1 to FIG. 3, the ingredient and valence of C, O, N is seen from figure
State is consistent with carbonitride.
It is the XRD comparison diagram of CN-D-1, CN-D-2 respectively shown in Fig. 4.It can be seen from the figure that two kinds of substances at 27 ° and
13 ° of appearance is more consistent, and occurs without miscellaneous peak, illustrates that the structure of CN-D-2 is nitridation carbon structure.The peak intensity phase of CN-D-2
All weakened than CN-D-1, illustrates that calcining forms more Micro-sheet Structures so that CN-D-2 crystallinity decreases twice；
Simultaneously CN-D-2 27 ° or so peak position with respect to CN-D-1 have it is offset, illustrate calcining after CN-D-2 interlamellar spacing it is bigger.
It is the IR comparison diagram of CN-D-1, CN-D-2 respectively shown in Fig. 5.As shown, the appearance situation of two kinds of substances is basic
Unanimously, illustrate the nitridation carbon structure for calcining and having not been changed CN-D-2 and essential groups.
It is the DRS comparison diagram of CN-D-1, CN-D-2 respectively shown in Fig. 6, as can be seen from the figure CN-D-2 is with respect to CN-D-1
Blue shift has occurred, illustrates to calcine twice so that CN-D-2 has more microcosmic lamellas and thinner microscopic dimensions.
The calcined CN-D-2 of Fig. 7 is more fluffy, is tested and is found by BET specific surface area, and the specific surface area of CN-D-2 reaches
170.2m2/ g, and CN-D-1 is then, is 6.6m2/ g is promoted larger.See from graph of pore diameter distribution, after oxygen corrodes
There are a large amount of apertures in the aperture of 2~5nm range in CN-D-2, this provides a large amount of reaction site for its photocatalysis, is it
Stronger smooth detergent power is provided with to provide the foundation.
It is the absorbance comparison diagram of CN-D-2 and other formaldehyde light cleansers 1#, the 2# prepared respectively shown in Fig. 8, from figure
It can be seen that smooth cleanser prepared by the present invention has stronger absorption to the light of 200~1100nm wave band.
Embodiment 2
10g dicyandiamide is placed in crucible and is covered, is calcined in Muffle furnace, calcination temperature is 650 DEG C, soaking time 2
Hour, heating rate is 5.0 DEG C/min；It pulverizes after natural cooling, obtains graphite phase carbon nitride (CN-D-1), weigh 1.2g
It is contained in crucible and does not cover, and drawout, calcine again, calcination temperature is 550 DEG C, and soaking time is 1 hour, and heating rate is
10.0℃/min.High-specific surface area carbon nitride photocatalyst (CN-D-2) is obtained after natural cooling.Weigh 0.01g CN-D-2 in
In 100mL water (about 100g), using ultrasonic machine ultrasound 1 hour, then it is centrifuged using centrifuge, obtains milk-white coloured suspension, it is dense
Degree is about 0.008wt%, and pH is about 6~7.
Embodiment 3
10g dicyandiamide is placed in crucible and is covered, is calcined in Muffle furnace, calcination temperature is 500 DEG C, soaking time 6
Hour, heating rate is 1.0 DEG C/min；It pulverizes after natural cooling, obtains graphite phase carbon nitride (CN-D-1), weigh 1.2g
It is contained in crucible and does not cover, and drawout, calcine again, calcination temperature is 450 DEG C, and soaking time is 4 hours, and heating rate is
2.0℃/min.High-specific surface area carbon nitride photocatalyst (CN-D-2) is obtained after natural cooling.1g CN-D-2 is weighed in 100mL
In water (about 100g), using ball mill ball milling 8 hours, it is then allowed to stand removal sediment, obtains milk-white coloured suspension, concentration is about
0.011wt%, pH are about 6~7.
Embodiment 4
10g dicyandiamide is placed in crucible and is covered, is calcined in Muffle furnace, calcination temperature is 600 DEG C, soaking time 3
Hour, heating rate is 3.0 DEG C/min；It pulverizes after natural cooling, obtains graphite phase carbon nitride (CN-D-1), weigh 1.2g
It is contained in crucible and does not cover, and drawout, calcine again, calcination temperature is 500 DEG C, and soaking time is 3 hours, and heating rate is
7.0℃/min.High-specific surface area carbon nitride photocatalyst (CN-D-2) is obtained after natural cooling.0.1g CN-D-2 is weighed, is dispersed
In 100mL water (about 100g), is stirred 24 hours using blender, is then centrifuged using centrifuge, obtains milk-white coloured suspension,
Concentration is about 0.01wt%, and pH is about 6~7.
The Photocatalytic Degradation Property of PARA FORMALDEHYDE PRILLS(91,95) is verified：
The CN-D-2 light cleanser that embodiment 1 is prepared is dispersed in culture dish and is dried, the powder of 50mg is obtained, and
It is placed in Photoreactor.Injection formaldehyde makes its concentration be less than 5mg/m3, using in electrochemical sensor real-time detection reactor
Concentration variation opens light source after concentration is stablized and carries out degradation experiment, degradable 61% formaldehyde (1.048mg/m in 16 hours3
Drop to 0.419mg/m3), illustrate that formaldehyde light cleanser PARA FORMALDEHYDE PRILLS(91,95) prepared by the present invention has stronger smooth purification efficiency.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (10)
1. a kind of preparation method of the formaldehyde light cleanser of the high stability of neutrality, it is characterised in that include the following steps：
S1. dicyandiamide is calcined in 500~650 DEG C, obtains graphite phase carbon nitride；
S2. graphite phase carbon nitride is pulverized, is calcined again for 400~550 DEG C under air atmosphere, obtains carbonitride；
S3. neutral formaldehyde light cleanser will in carbonitride disperse water, be obtained.
2. the preparation method of the formaldehyde light cleanser of the high stability of neutrality according to claim 1, it is characterised in that：Step
The temperature of calcining described in rapid S1 is 500~600 DEG C；The soaking time of the calcining is 2~6 hours；The heating of the calcining
Rate is 1~5 DEG C/min.
3. the preparation method of the formaldehyde light cleanser of the high stability of neutrality according to claim 1, it is characterised in that：Step
The soaking time of calcining described in rapid S1 is 3~5 hours；The heating rate of the calcining is 2~4 DEG C/min.
4. the preparation method of the formaldehyde light cleanser of the high stability of neutrality according to claim 1, it is characterised in that：Step
The temperature calcined again described in rapid S2 is 450~550 DEG C；The soaking time calcined again is 1~4 hour；It is described again
The heating rate of secondary calcining is 2~10 DEG C/min.
5. the preparation method of the formaldehyde light cleanser of the high stability of neutrality according to claim 1, it is characterised in that：Step
The heating rate calcined again described in rapid S2 is 4~7 DEG C/min.
6. the preparation method of the formaldehyde light cleanser of the high stability of neutrality according to claim 1, it is characterised in that：Step
The mass ratio of carbonitride and water used is 1 in rapid S3:100~1:10000；Described is separated into stirring, ultrasound, ball milling or shake
It swings.
7. the preparation method of the formaldehyde light cleanser of the high stability of neutrality according to claim 1, it is characterised in that：Step
Rapid S1 includes the following steps：Dicyandiamide is placed in crucible and is covered, Muffle furnace is put into, is calcined in 500~600 DEG C, when heat preservation
Between be 3~5 hours, heating rate be 2~4 DEG C/min, obtain graphite phase carbon nitride.
8. the preparation method of the formaldehyde light cleanser of the high stability of neutrality according to claim 1, it is characterised in that：Step
Rapid S2 includes the following steps：Graphite phase carbon nitride is pulverized, 450~550 DEG C are warming up in air atmosphere and is calcined again,
Heat preservation 1~4 hour, heating rate are 4~7 DEG C/min, obtain carbonitride.
9. the preparation method of the formaldehyde light cleanser of the high stability of neutrality according to claim 1, it is characterised in that：Step
Rapid S3 includes the following steps：By carbonitride and water in mass ratio 1:100~1:10000 mixing, using ultrasonic, broken, ball milling or
The mode of stirring is dispersed, and jitter time is 0.5~36h, obtains neutral formaldehyde light cleanser.
10. a kind of formaldehyde light cleanser of the high stability of neutrality, it is characterised in that according to claim 1~9 described in any one
Preparation method obtain.
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