CN106391086A - Preparation method of C3N4/SiO2 heterojunction photocatalyst - Google Patents
Preparation method of C3N4/SiO2 heterojunction photocatalyst Download PDFInfo
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 77
- 235000012239 silicon dioxide Nutrition 0.000 title claims abstract description 39
- 239000000377 silicon dioxide Substances 0.000 title claims abstract description 39
- 229910052681 coesite Inorganic materials 0.000 title claims abstract description 31
- 229910052906 cristobalite Inorganic materials 0.000 title claims abstract description 31
- 229910052682 stishovite Inorganic materials 0.000 title claims abstract description 31
- 229910052905 tridymite Inorganic materials 0.000 title claims abstract description 31
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 16
- 239000007787 solid Substances 0.000 claims abstract description 7
- 239000000725 suspension Substances 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 229920000877 Melamine resin Polymers 0.000 claims abstract 2
- 230000000694 effects Effects 0.000 claims description 12
- 239000002131 composite material Substances 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 239000003054 catalyst Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- 239000003344 environmental pollutant Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 231100000719 pollutant Toxicity 0.000 claims description 3
- -1 melamine Amine Chemical class 0.000 claims description 2
- 238000013033 photocatalytic degradation reaction Methods 0.000 claims description 2
- 238000005245 sintering Methods 0.000 claims description 2
- 239000007790 solid phase Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims 1
- 230000015556 catabolic process Effects 0.000 abstract description 6
- 238000006731 degradation reaction Methods 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 239000002957 persistent organic pollutant Substances 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract 2
- 239000008367 deionised water Substances 0.000 abstract 1
- 229910021641 deionized water Inorganic materials 0.000 abstract 1
- 230000031700 light absorption Effects 0.000 abstract 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 abstract 1
- 239000005543 nano-size silicon particle Substances 0.000 abstract 1
- 238000001132 ultrasonic dispersion Methods 0.000 abstract 1
- HFZWRUODUSTPEG-UHFFFAOYSA-N 2,4-dichlorophenol Chemical compound OC1=CC=C(Cl)C=C1Cl HFZWRUODUSTPEG-UHFFFAOYSA-N 0.000 description 10
- 238000006555 catalytic reaction Methods 0.000 description 10
- 239000000523 sample Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 7
- 230000001699 photocatalysis Effects 0.000 description 7
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 7
- 229940043267 rhodamine b Drugs 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 238000011160 research Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000007146 photocatalysis Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000005286 illumination Methods 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- FIDRAVVQGKNYQK-UHFFFAOYSA-N 1,2,3,4-tetrahydrotriazine Chemical group C1NNNC=C1 FIDRAVVQGKNYQK-UHFFFAOYSA-N 0.000 description 1
- UMPSXRYVXUPCOS-UHFFFAOYSA-N 2,3-dichlorophenol Chemical compound OC1=CC=CC(Cl)=C1Cl UMPSXRYVXUPCOS-UHFFFAOYSA-N 0.000 description 1
- 208000035126 Facies Diseases 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Inorganic materials [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000021615 conjugation Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000007857 degradation product Substances 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 238000006303 photolysis reaction Methods 0.000 description 1
- 230000015843 photosynthesis, light reaction Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000001055 reflectance spectroscopy Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- 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
-
- B01J35/39—
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
Abstract
The invention relates to a C3N4/SiO2 heterojunction photocatalyst and a preparation method thereof. The method comprises the following steps that 2 g of melamine and a certain mass of nanosilicon dioxide are weighed; 10 ml of deionized water is added into the mixture; ultrasonic dispersion is performed for 4 h; the obtained suspension is stirred at the temperature of 90 DEG C for 12 h; then, the obtained solid is heated to 540 DEG C at the heating speed of 4 DEG C per min; the temperature is kept constant for 4 h; after natural cooling, the C3N4/SiO2 heterojunction photocatalyst is obtained. The C3N4/SiO2 heterojunction photocatalyst has the excellent organic pollutant degradation performance under visible light. According to the preparation method, the raw materials are cheap, and the method is simple, so that the product cost is effectively lowered, the visible light absorption range is enlarged due to composition of C3N4 and SiO2, the sunlight utilization rate is increased, and the high practical value and application prospect are achieved.
Description
Technical field
The present invention relates to a kind of C3N4/SiO2 heterojunction photocatalyst and preparation method thereof, belong to catalysis material research
Technical field.
Background technology
With the continuous development of human society, problem of environmental pollution also increasingly highlights.As a kind of high-level oxidation technology, light
Catalysis technique than traditional absorption, chemical oxidation, the method such as burn, there is low energy consumption, nontoxic, the advantages of high efficiency.Profit
The electronics being produced under light illumination with quasiconductor and hole, efficiently by thorough for organic pollution mineralising be carbon dioxide and water, be
A kind of boundless pollutant control technology of prospect.
1972, Japanese Scientists Fujishima reported first was with titanium dioxide for electrode with the experiment of photolysis water.
Open the new window of a fan for solving energy problem.However, as nearly research field growing up for 40 years, photocatalysis technology exists
The application effect that actual hydrogen manufacturing effect, CO2 convert in quantum efficiency and wastewater treatment process is also undesirable, and reason includes quantum
Inefficient it is seen that photolytic activity is poor, light scattering serious, it is difficult to reclaim, reactor design is difficult, light is utilized efficiency is low, preparation
The shortcomings of condition harshness, poor adhesive force, high cost.Be concentrated mainly on for the essence of light-catalyzed reaction following two in terms of：
One is to suppress light induced electron and hole to being combined, and improves photocatalytic degradation efficiency；Two is the suction of extension semiconductor light-catalyst
The scope receiving sideband is so as to visible ray or even infrared spectrum can be absorbed.Therefore development of new visible light type and form light
Catalysis material, strengthening photochemical catalyzing and the basic research of degradable organic pollutant and applied research is photocatalysis technology development
Inexorable trend, be also in current energy conversion and environmental improvement one significantly work, there is important economic valency
Value and social value.
2008, a kind of organic photocatalysis of no metal with conjugation of king's heart morning reported first of University of Fuzhou
Agent graphite phase carbon nitride (g-C3N4).Due to having a higher catalysis activity, good biocompatibility, cheap and easy to get,
The features such as hypotoxicity, carbonitride receives the concern of numerous scholars.The energy gap of carbonitride is 2.7eV, can be swashed by visible ray
Send out, with respect to titanium dioxide, zinc oxide, carbonitride has bigger sun light utilization efficiency to visible ray.However, g-C3N4 is not yet
Evitable have some shortcomings.Although g-C3N4 is analogous to the two-dimensional material of graphene-structured in theory, under normal circumstances
Class graphite phase carbon nitride is but the three-dimensional bulk structure that layer upon layer is got up.This structure one side result in the ratio table of g-C3N4
Area reduces, little with reactant contact area in catalytic reaction process, and the carrier on the other hand making generation under illumination can not be fast
Speed is delivered to material surface and participates in reaction, greatly reduces separation and the transmission efficiency of g-C3N4 photo-generated carrier.Research work
Person takes many methods, to improve the performance of g-C3N4, such as：Morphological control；Manufacturing hole on g-C3N4, to increase surface
Long-pending；Noble metal loading；Ion doping etc..But due to modified high cost, the reason such as complex process, carbonitride is still difficult to apply.
Content of the invention
It is an object of the invention to provide a kind of C3N4/SiO2 heterojunction photocatalyst and preparation method thereof.The method utilizes
Simple solid phase high-temperature sintering process has directly obtained the photocatalyst with high efficiency photocatalysis activity.
A kind of preparation method of C3N4/SiO2 heterojunction photocatalyst that the present invention provides, comprises the steps：
(1) weigh 2g tripolycyanamide, be added thereto to the nano SiO 2 particle of different proportion, ultrasonic 4 hours, obtain
Suspension；
(2) suspension of step (1) gained is stirred 12h at 90 degrees Celsius, so that moisture is volatilized completely, obtain white solid
Body；
(3) the solid of step (2) gained is heated to 540 degrees Celsius with 4 degree of heating rates per minute, and protects at such a temperature
Hold 4 hours；
(4) after natural cooling, you can obtain C3N4/SiO2 heterojunction photocatalyst.
The C3N4/SiO2 heterojunction photocatalyst that the present invention provides has excellent visible light catalysis activity.The present invention carries
For preparation method, its raw material is cheap, and method is simple, therefore effectively reduces product cost, and the two compound has been expanded visible
Light abstraction width, improves the utilization rate of sunlight, has very high practical value and application prospect.
Brief description
Fig. 1 is the X-ray diffractogram of prepared C3N4/SiO2 heterojunction photocatalyst.
Fig. 2 is the UV-vis DRS spectrogram of prepared C3N4/SiO2 heterojunction photocatalyst.
Fig. 3 is prepared C3N4/SiO2 heterojunction photocatalyst in visible ray (λ>Under 420nm), rhodamine B degradation
(RhB) Kinetics Rate Constants By Using (k) comparison diagram.
Fig. 4 is prepared C3N4/SiO2 heterojunction photocatalyst in visible ray (λ>Under 420nm), 2,4- dichloro of degrading
Kinetics Rate Constants By Using (k) comparison diagram of phenol (2,4-DCP).
Specific embodiment
Experimental technique used in following embodiments if no special instructions, is conventional method.
Material used in following embodiments, reagent etc., if no special instructions, all commercially obtain.
Tripolycyanamide used in the following embodiment of the present invention, silicon dioxide is that commercially available analysis is pure, and target degraded is dirty
It is pure that dye thing RhB and 2,4-DCP is commercially available analysis, and pure water is self-control.
Embodiment 1:The preparation of sample and name.
Weigh 2g tripolycyanamide, be added thereto to the nano SiO 2 particle of different proportion, ultrasonic 4 hours, hanged
Turbid liquid；The suspension of gained is stirred 12h at 90 degrees Celsius, so that moisture is volatilized completely, obtain white solid；Gained solid with 4
Spend heating rate per minute and be heated to 540 degrees Celsius, and keep 4 hours at such a temperature；After natural cooling, you can obtain
C3N4/SiO2 heterojunction photocatalyst.Silicon dioxide is respectively 1 with the mass ratio of tripolycyanamide:100,3:100,5:100,10:
100,30:100, the sample of gained is named as respectively：g-C3N4/SiO2-1,g-C3N4/SiO2-3,g-C3N4/SiO2-5,g-
C3N4/SiO2- 10 and g-C3N4/SiO2-30.
Embodiment 1:The crystal structure of sample
In following examples, using the crystalline substance of the prepared sample of U.S.'s Rigaku D/max-2400 type X-ray diffractometer test
Body structure.
Fig. 1 is the XRD spectrum of prepared sample.All photocatalysts all show two obvious characteristic diffraction peaks.Its
In, stronger diffraction maximum is to occur in that obvious (002) peak 27.5 ° of positions, is the accumulation of typical graphite-like structure,
It can be appreciated that the interlamellar spacing of g-C3N4, corresponding interplanar distance is 0.325nm.Another one position is 13.1 ° of positions
(100) diffraction maximum, corresponding is g-C3N4 repetitive structure in the same plane it is understood that for repeating in 5-triazine units
Distance between adjacent N hole, corresponding interplanar distance is 0.676nm.This corresponding card number of two diffraction maximums is JCPDS087-
1526.With increasing of silicon dioxide compound quantity, the peak intensity of XRD has weakened, and shows that the introducing of silicon dioxide makes g-C3N4's
Degree of crystallinity reduces.When the content of silicon dioxide reaches 10%, at 23 °, a broad peak occurs, this is the peak of silicon dioxide.
Embodiment 2：The optical property of sample characterizes
Using Hitachi U-3900 ultraviolet-visible spectrophotometer, with BaSO4As reference, scanning wavelength scope is：
200～800nm, slit width 2nm, scanning speed is 600nm/min, the change of the optical property of detection sample.
The change of electronic property can lead to the photophysical property of material to change, and the shape of derivative spectomstry and intensity occur
Change.Fig. 2 is the UV Diffuse Reflectance Spectroscopy figure of g-C3N4 and g-C3N4/SiO2 composite photo-catalyst.It can be seen that it is multiple
There is obvious red shift in the band edge of closing light catalyst g-C3N4/SiO2, this is because SiO2 can increase material in visible region
Absorption, these features are conducive to the raising of g-C3N4/SiO2 visible light activity.
Using rhdamine B and 2,4- Dichlorophenol as target degradation product, investigate photocatalyst under visible light illumination
Catalysis activity.It is light source that visible ray adopts 500W xenon lamp, and average intensity is 35mW/cm2.Rhodamine B concentration is by UV, visible light
Spectrophotometer (Hitachi U-3900) records.Concrete grammar is as follows：The hydridization photocatalyst weighing 50mg adds 50ml dense
Spend in the rhodamine B solution for 5ppm (or 2,4- Dichlorophenol, 50mL, 5ppm), ultrasonic disperse 30 minutes, it is then placed in darkroom
Stirring makes catalyst and rhodamine B solution (or 2,4- Dichlorophenol) reach sufficient adsorption equilibrium for 60 minutes.In the regular hour
In interval, measure 3ml liquid.Finally the liquid measuring is recorded rhodamine B dominant wavelength by ultraviolet-uisible spectrophotometer to exist
The change of absorbance at 553nm, to evaluate the change of photocatalytic activity with this.The degradation rate of 2,4- Dichlorophenol and product then lead to
Cross high performance liquid chromatography to detect.The test condition of Dichlorophenol is UV-detector, Venusil XBP-C18 post, Detection wavelength
284nm, mobile phase is：Organic faciess methanol 75%, aqueous phase ultra-pure water 25%, flow velocity is 1ml/min.
Embodiment 3：The ability of prepared sample degradation rhodamine B.
With rhodamine B as target contaminant, the catalysis activity of g-C3N4 and g-C3N4/SiO2 composite photo-catalyst is carried out
Research.As can be seen from Fig. 3, all modified by SiO2 after g-C3N4 photocatalyst all show the light higher than former g-C3N4
Rate of catalysis reaction, C3N4/SiO2-5 shows highest photocatalytic activity, 4.81 times of about former g-C3N4.
Embodiment 4：The ability of prepared sample degradation 2,4- Dichlorophenol.
In order to investigate the degradation capability to colourless phenyl pollutant for the composite photo-catalyst C3N4/SiO2, adopt 2,4- dichloro
Phenol is investigated to its activity for target-probe molecule.Fig. 4 is g-C3N4 and C3N4/SiO2 composite photo-catalyst visible
(λ under light>420nm) the apparent reaction rate constant figure of degraded 2,4- dichloro phenol solution (5ppm).It can be seen that it is compound
The activity of photocatalyst C3N4/SiO2 system is higher than g-C3N4 system, and this shows that the modification of SiO2 can also effectively improve g-
The photocatalytic activity of C3N4 degraded 2,4- Dichlorophenol.
Claims (5)
1. a kind of C3N4/SiO2 composite photo-catalyst preparation method it is characterised in that：Directly obtained using solid phase high-temperature sintering process
Arrive.
2. the method for claim 1, it comprises the following steps that：
(1) weigh 2g tripolycyanamide, be added thereto to the nano SiO 2 particle of different proportion, ultrasonic 4 hours, obtain suspended
Liquid；
(2) suspension of step (1) gained is stirred 12h at 90 degrees Celsius, so that moisture is volatilized completely, obtain white solid；
(3) the solid of step (2) gained is heated to 540 degrees Celsius with 4 degree of heating rates per minute, and keeps 4 at such a temperature
Hour；
(4) after natural cooling, you can obtain C3N4/SiO2 heterojunction photocatalyst.
3. method as claimed in claim 2 prepares C3N4/SiO2 heterojunction photocatalyst it is characterised in that synthesized answers
Closing light catalyst has higher specific surface area, in 11.0～36.8m2Between/g.
4. method preparation C3N4/SiO2 heterojunction photocatalyst as claimed in claim 2 is it is characterised in that use melamine
Amine and silicon dioxide as predecessor, dinectly bruning after uniformly mixing, the ratio that silicon dioxide accounts for tripolycyanamide is：1%～
30%.
5. a kind of method preparation C3N4/SiO2 heterojunction photocatalyst as claimed in claim 2 is organic as photocatalytic degradation
The effect of pollutant.
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Cited By (10)
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| CN107282083A (en) * | 2017-07-13 | 2017-10-24 | 扬州工业职业技术学院 | A kind of graphite phase carbon nitride nano material of silicon zinc doping and its application in photo catalytic reduction |
| CN107321375A (en) * | 2017-07-13 | 2017-11-07 | 扬州工业职业技术学院 | A kind of SiO2/ZnO/g‑C3N4Nano material and its application in reduction of hexavalent chromium |
| CN107649177A (en) * | 2017-09-19 | 2018-02-02 | 江苏理工学院 | A kind of modified g C3N4–SiO2Heterojunction photocatalyst and preparation method thereof |
| CN107899600A (en) * | 2017-11-23 | 2018-04-13 | 江苏理工学院 | A kind of Cu2‑xS/g‑C3N4Heterojunction photocatalyst and preparation method thereof |
| CN109777230A (en) * | 2019-02-25 | 2019-05-21 | 牟富书 | A kind of light catalyzed coating and preparation method thereof |
| CN111450869A (en) * | 2020-05-10 | 2020-07-28 | 王娟丽 | Ultrathin S, B codoped g-C3N4Photocatalyst and preparation method thereof |
| CN112191220A (en) * | 2020-09-18 | 2021-01-08 | 成都理工大学 | g-C with adsorption photocatalysis synergy effect3N4/SiO2Composite environment purifying material |
| CN112237938A (en) * | 2020-09-15 | 2021-01-19 | 西安工程大学 | Composite photocatalyst for treating textile printing and dyeing wastewater, fiber thereof and preparation method thereof |
| CN115197591A (en) * | 2022-01-12 | 2022-10-18 | 天津市职业大学 | Visible light catalytic composite material and preparation method thereof |
| CN115646522A (en) * | 2022-09-08 | 2023-01-31 | 浙江大学杭州国际科创中心 | Preparation method of potassium ion doped silicon nitride-carbon oxide heterojunction, product and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104437649A (en) * | 2013-09-24 | 2015-03-25 | 中国地质大学（北京） | ZnO/mesoporous C3N4 composite photocatalyst and preparation method thereof |
| CN104607231A (en) * | 2015-02-16 | 2015-05-13 | 江苏理工学院 | Carbon nitride photocatalyst with three-dimensional ordered macroporous structure and preparation method of carbon nitride photocatalyst |
| CN105195221A (en) * | 2015-07-06 | 2015-12-30 | 阜阳师范学院 | Composite photocatalyst SiO2/g-C3N4 as well as preparation method and application thereof |
| CN105435763A (en) * | 2015-07-06 | 2016-03-30 | 阜阳师范学院 | Composite photocatalyst SiO2/CNI and preparation method and application thereof |
-
2016
- 2016-09-29 CN CN201610868070.8A patent/CN106391086A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104437649A (en) * | 2013-09-24 | 2015-03-25 | 中国地质大学（北京） | ZnO/mesoporous C3N4 composite photocatalyst and preparation method thereof |
| CN104607231A (en) * | 2015-02-16 | 2015-05-13 | 江苏理工学院 | Carbon nitride photocatalyst with three-dimensional ordered macroporous structure and preparation method of carbon nitride photocatalyst |
| CN105195221A (en) * | 2015-07-06 | 2015-12-30 | 阜阳师范学院 | Composite photocatalyst SiO2/g-C3N4 as well as preparation method and application thereof |
| CN105435763A (en) * | 2015-07-06 | 2016-03-30 | 阜阳师范学院 | Composite photocatalyst SiO2/CNI and preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 王小星: "SiO2/g-C3N4和ZrO2/g-C3N4催化剂光催化降解染料的研究", 《中国优秀硕士学位论文全文数据库 工程科技I辑》 * |
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| CN107321375A (en) * | 2017-07-13 | 2017-11-07 | 扬州工业职业技术学院 | A kind of SiO2/ZnO/g‑C3N4Nano material and its application in reduction of hexavalent chromium |
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| CN111450869A (en) * | 2020-05-10 | 2020-07-28 | 王娟丽 | Ultrathin S, B codoped g-C3N4Photocatalyst and preparation method thereof |
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| CN112191220A (en) * | 2020-09-18 | 2021-01-08 | 成都理工大学 | g-C with adsorption photocatalysis synergy effect3N4/SiO2Composite environment purifying material |
| CN115197591A (en) * | 2022-01-12 | 2022-10-18 | 天津市职业大学 | Visible light catalytic composite material and preparation method thereof |
| CN115646522A (en) * | 2022-09-08 | 2023-01-31 | 浙江大学杭州国际科创中心 | Preparation method of potassium ion doped silicon nitride-carbon oxide heterojunction, product and application thereof |
| CN115646522B (en) * | 2022-09-08 | 2024-03-22 | 浙江大学杭州国际科创中心 | Preparation method of potassium ion doped carbon nitride silicon dioxide heterojunction, product and application thereof |
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