CN104117375B - Preparation method of synthesized carbon quantum dot-carbon nitrogen macromolecule composite infrared light catalyst - Google Patents
Preparation method of synthesized carbon quantum dot-carbon nitrogen macromolecule composite infrared light catalyst Download PDFInfo
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Abstract
The invention discloses a preparation method of a synthesized carbon quantum dot-carbon nitrogen macromolecule composite infrared light catalyst, belonging to the field of photocatalysis. The preparation method comprises the following steps: (1) synthesizing a carbon quantum dot with an up-conversion luminescence property by glucose; (2) adding a certain amount of carbon quantum dot solution into an aqueous solution of melamine, stirring so as to mix uniformly, and then drying by evaporation at 80 DEG C; and (3) heating and drying the obtained sample by evaporation in the air atmosphere at 450 DEG C for 2 hours, thereby obtaining the carbon quantum dot-carbon nitrogen macromolecule composite photocatalyst. The prepared carbon quantum dot-carbon nitrogen macromolecule composite photocatalyst degrades methyl orange under the irradiation of infrared light, and the result shows that the catalyst can effectively degrade methyl orange under infrared light; the infrared light accounts for about 53% of solar energy, and is not effectively used for degrading pollutants in the photocatalysis field so far. The synthesized material can effectively degrade pollutants by utilizing infrared light, is low in reaction cost, and has a certain application prospect.
Description
Technical field
The invention belongs to photocatalysis field, be specifically related to a kind of synthesis carbon quantum dot-carbon nitrogen macromolecule and be combined infrared
The preparation method of photocatalyst, i.e. carbon quantum dot and carbon nitrogen macromolecule being combined with each other synthesis can be under infrared light
The novel photocatalyst of degradation of dye pollutant.
Background technology
Photocatalysis is widely used in environmental pollution improvement in recent years, and current photocatalyst is mostly only with ultraviolet light
And visible ray, it is impossible to utilize the infrared light accounting for solar energy 53%.It is therefore desirable to energy under exploitation infrared light
The photocatalyst of degradation of contaminant.Rare earth material is common up-conversion luminescent material, can by near infrared light and
Infrared light is converted into visible ray or ultraviolet light, extensively and the catalysis material synthesis that is combined with each other is available infrared
Photocatalyst (Zhijie Zhang and Wenzhong Wang, the Infrared-light-induced of light
Photocatalysis on BiErWO6 (photocatalyst of infrared optical response based on BiErWO6), Dalton
Trans.,2013,42,12072–12074).But containing the metal such as bismuth, erbium in rare earth up-conversion,
The problem that there is metal loss during use, can be to environment.Kang Zhenhui seminar of University Of Suzhou is sent out
Now the carbon quantum dot material containing only the element such as carbon, nitrogen also can absorb infrared light emission ultraviolet light or visible ray, can make
Under the conditions of infrared light, visible ray or purple is provided for the photocatalyst such as titanium dioxide, Red copper oxide for nanoscale light source
Outer light degradation pollutant (Haitao Li, Xiaodie He, Zhenhui Kang, Hui Huang, Yang Liu,
Jinglin Liu,Suoyuan Lian,Chi Him A.Tsang,Xiaobao Yang,and Shuit-Tong
Lee, Water-Soluble Fluorescent Carbon Quantum Dots and Photocatalyst
Design (water-solubility fluorescent carbon quantum dot and photocatalysis design), Angew.Chem.Int.Ed.2010,49,
4430-4434；Haitao Li,Ruihua Liu,Yang Liu,Hui Huang,Hang Yu,Hai Ming,
Suoyuan Lian, Shuit-Tong Leeab and Zhenhui Kang, Carbon quantum
dots/Cu2O composites with protruding nanostructures and their highly efficient
(near) infrared photocatalytic behavior (carbon quantum dot/Red copper oxide composite nanostructure and height
(closely) infrared light catalysis behavior of effect), J.Mater.Chem., 2012,22,17,470 17475), phase
Close work and applied for national patent: the preparation method of carbon quantum dot and apply this carbon quantum dot to prepare the side of photocatalyst
Method, national patent number is CN102127431A.There is a lot of hydrophilic group such as hydroxyl, carbonyl on carbon quantum dot surface
Group (Haitao Li, Zhenhui Kang, Yang Liu and Shuit-Tong Lee, Carbon nanodots:
Synthesis, properties and applications (carbon quantum dot: synthesis, character and application), J.Mater.
Chem., 2012,22,24,230 24253), there is a lot of hydroxyl on titanium dioxide and Red copper oxide surface, are also
Hydrophilic (Keita Takahashi and Hiroharu Yui, Analysis of Surface OH Groups on
TiO2Single Crystal with Polarization Modulation Infrared External Reflection
Spectroscopy (oh group on polarization modulation infrared external reflectance spectrum analysis titanium dioxide single crystalline surface), J.
Phys.Chem.C2009,113,20322–20327；Xingyi Deng,Tirma Herranz,
Christoph Weis, Hendrik Bluhm, and Miquel Salmeron, Adsorption of Water on
Cu2O and Al2O3Thin Films (water is in Red copper oxide and the absorption of aluminium sesquioxide film surface), J.
Phys.Chem.C2008,112,9,668 9672), therefore stir only by under room temperature, carbon quantum dot
Just can well be combined with each other with these metal oxide photocatalysts.But not every photocatalysis material
The surface of material is all hydrophilic, and such as the carbon nitrogen high-molecular optical catalyst the most extensively received publicity, it is without metal,
Avoid INVENTIONConventional metal-oxide photocatalyst metal loss problem in use, and under visible light may be used
Effectively decomposition water goes out hydrogen and degraded aromatics pollutant (Yong Wang, Xinchen Wang, and Markus
Antonietti,Polymeric Graphitic Carbon Nitride as a Heterogenous
Organocatalyst:From Photochemistry to Multipurpose Catalysis to
Sustainable Chemistry (polymer graphite phase carbon nitrogen is as heterogeneous organic photocatalyst: from photochemistry,
Catalysis is to sustainable chemistry), Angew.Chem.Int.Ed.2012,51,68-89；Yong Guo,ab
Sheng Chu,abc Shicheng Yan,ab Ying Wang*abc and Zhigang Zou,
Developing a polymeric semiconductor photocatalyst with visible light
Response (develops visible light-responded semiconducting polymer's photocatalyst), Chem.Commun.,
2010,46,7325-7327).But it is hydrophobic material, and the method for very difficult stirring at normal temperature is by carbon quantum dot
Being combined with each other with carbon nitrogen high-molecular optical catalyst, synthesis can utilize the nonmetal of infrared light degraded fragrance pollutant
Photocatalyst.
Summary of the invention
1. invention to solve the technical problem that
I am in order to solve above-mentioned technical problem, by with carbon nitrogen macromolecule presoma tripolycyanamide carbon nitrogen macromolecule
It is coated with the way of then high-temperature process, the New Type of Carbon quantum dot of the available infrared light degradation of contaminant of synthesis-
Carbon nitrogen macromolecule composite photo-catalyst.The method overcome carbon quantum dot to be difficult at normal temperatures and hydrophobic carbon nitrogen high score
Sub-photocatalyst is compounded to form the shortcoming of the composite photo-catalyst that can utilize infrared light, and with glucose and melamine
Amine is raw material, low cost, it is only necessary to need not carrier gas in the instruments such as Muffle furnace, and heating process, and technique is simple,
There is preferably actual application potential.
2. technical scheme
Inventive principle: carbon quantum dot is a kind of fluorescent material, can absorb (the upper conversion of infrared light emission visible ray
Luminous), surface has the most hydrophilic functional group, carbon nitrogen macromolecule to be free from the organic semiconductor photocatalysis of metal
Agent, can the organic pollution in degradation water effectively, be a hydrophobic material.The two is at normal temperatures by stirring
The mode of mixing can not well form complex.In the present invention, we have employed stepped approach: first synthesizes carbon
Quantum dot, is then dispersed in carbon quantum dot in the aqueous solution of tripolycyanamide stirring and is evaporated, finally will be evaporated gained
Mixture within 2 hours, just obtain the carbon quantum dot-carbon nitrogen macromolecule complex light of infrared optical response 450 DEG C of heating
Catalyst.
A kind of carbon quantum dot-carbon nitrogen macromolecule that synthesizes is combined the preparation method of infrared light catalyst, the steps include:
(1) 8-9g glucose is placed in the NaOH solution that 100ml concentration is 0.1-0.2mol/L, and uses
Ultrasonic Treatment half an hour, obtain orange carbon quantum dot solution.
(2) above-mentioned carbon quantum dot solution 8-9ml is joined in the tripolycyanamide aqueous solution of 40ml, melamine
The ratio that amine aqueous solution is dissolved in 40ml deionized water according to 1g tripolycyanamide configures, and stirs and makes it in 2 hours
Mix homogeneously, is then evaporated at 80 DEG C；
(3) sample that is evaporated in step (2) is put in Muffle furnace, roasting 2 under 450 DEG C of air atmospheres
Hour, prepare carbon quantum dot-carbon nitrogen macromolecule and be combined infrared light catalyst.
It is combined infrared light catalyst with obtained carbon quantum dot-carbon nitrogen macromolecule to degrade under infrared lamp irradiates
4mg/L methyl orange 4 hours, result shows that the methyl orange of 90% can be degraded, and therefore this material is permissible
Effectively utilize degradation of contaminant under infrared light.
Described step (1) uses KQ-00KED type high power numerical control ultrasonic cleaner (Kunshan ultrasonic instrument
Company limited).
Described step (4) uses the medical infrared lamp in 100 watts, Philip.
3. beneficial effect
The present invention proposes a kind of carbon quantum dot-carbon nitrogen macromolecule that synthesizes and is combined the preparation side of infrared light catalyst
Method, first passage two-step method of the present invention: (1) first uses the high molecular presoma-tripolycyanamide of carbon nitrogen by carbon quantum
Point cladding is got up, the complex of this tripolycyanamide carbon coated quantum dot of (2) high-temperature process, successfully synthesis
Can degrade under infrared light the carbon quantum dot-carbon nitrogen macromolecule composite photocatalyst material of direction pollutant, improve
Utilization ratio to light, this research contributes to promoting that photocatalysis technology is in field of environment pollution control further
Application.It has the advantages that:
(1) carbon quantum dot-carbon nitrogen macromolecule is combined infrared light catalyst and can carry out photocatalysis under infrared light,
Effectively utilize the sunlight energy, and without rare earth metal or heavy metal, it is to avoid metal loss.
(2), in this preparation method, hydrophobic carbon nitrogen macromolecule and hydrophilic carbon quantum dot are combined with each other,
Improve the utilization ratio to light.
(3) this preparation method is with glucose and tripolycyanamide as raw material, low cost, it is only necessary to the instrument such as Muffle furnace
Need not carrier gas in device, and heating process, technique is simple, has preferably actual application potential.
Accompanying drawing explanation
The electromicroscopic photograph of Fig. 1 carbon quantum dot, shows that the particle diameter of synthesized carbon quantum dot is at about 5nm；
The fluorescence photo of Fig. 2 carbon quantum dot, showing that synthesized carbon quantum dot can absorb infrared light emission can
See light；
Fig. 3 carbon quantum dot-high molecular electromicroscopic photograph of carbon nitrogen, the black spots in white circle circle segment in figure
Point part is the aggregation of carbon quantum dot；
Fig. 4 carbon quantum dot-high molecular fluorescence results of carbon nitrogen, shows that this composite can also absorb infrared light
Launch visible ray；
Fig. 5 quantum dot-carbon nitrogen macromolecule declines the result solving methyl orange at infrared light, shows that this composite can
With methyl orange of effectively degrading under infrared light；
Fig. 6 quantum dot-high molecular electromicroscopic photograph of carbon nitrogen, the black splotch part in white circle circle segment
Aggregation for carbon quantum dot；
Fig. 7 quantum dot-high molecular electromicroscopic photograph of carbon nitrogen, the black splotch part in white circle circle segment
Aggregation for carbon quantum dot；
Fig. 8 quantum dot-high molecular electromicroscopic photograph of carbon nitrogen, the black splotch part in white circle circle segment
Aggregation for carbon quantum dot；
Fig. 9 quantum dot-high molecular electromicroscopic photograph of carbon nitrogen, the black splotch part in white circle circle segment
Aggregation for carbon quantum dot；
Figure 10 quantum dot-high molecular electromicroscopic photograph of carbon nitrogen, the black splotch part in white circle circle segment
Aggregation for carbon quantum dot；
Figure 11 quantum dot-high molecular electromicroscopic photograph of carbon nitrogen, the black splotch part in white circle circle segment
Aggregation for carbon quantum dot；
Figure 12 quantum dot-high molecular electromicroscopic photograph of carbon nitrogen, the black splotch part in white circle circle segment
Aggregation for carbon quantum dot；
Figure 13 quantum dot-carbon nitrogen macromolecule declines the result solving methyl orange at infrared light, shows that this composite can
Methyl orange is solved to decline at infrared light；
Figure 14 quantum dot-carbon nitrogen macromolecule declines the result solving methyl orange at infrared light, shows that this composite can
Methyl orange is solved to decline at infrared light；
Figure 15 quantum dot-carbon nitrogen macromolecule declines the result solving methyl orange at infrared light, shows that this composite can
Methyl orange is solved to decline at infrared light；
Figure 16 quantum dot-carbon nitrogen macromolecule declines the result solving methyl orange at infrared light, shows that this composite can
Methyl orange is solved to decline at infrared light.
Detailed description of the invention
The present invention is further illustrated below by way of example.
Embodiment 1:
8g glucose is placed in the NaOH solution that concentration is 0.1mol/L of 100ml, and uses ultrasound wave
Process (KQ-00KED type high power numerical control ultrasonic cleaner) half an hour, obtain orange carbon quantum dot solution；
In the aqueous solution of the tripolycyanamide that above-mentioned carbon quantum dot solution 8ml is joined 40ml, tripolycyanamide aqueous solution
The ratio being dissolved in 40ml deionized water according to 1g tripolycyanamide configures, and stirs and makes its mix homogeneously in 2 hours,
Then it is evaporated at 80 DEG C；Sample will be evaporated and put in Muffle furnace, roasting 2 hours at 450 DEG C, prepare
Carbon quantum dot-carbon nitrogen macromolecule is combined infrared light catalyst.It is combined with obtained carbon quantum dot-carbon nitrogen macromolecule
Infrared light catalyst is degraded 4mg/L methyl orange 4 hours under infrared lamp irradiates, and degradation rate is 90%, shows
Can degrade under this material infrared light methyl orange.
Fig. 1 is carbon quantum dot electromicroscopic photograph, shows that carbon quantum dot particle diameter only has about 5nm, Fig. 2 to be carbon amounts
The fluorescence results of son point, it is seen that what it can launch 440-540nm under 800-900nm irradiates can
See light.Fig. 3 is carbon quantum dot-high molecular electromicroscopic photograph of carbon nitrogen, in figure in the part of white circle cincture
Black splotch part is the aggregation of carbon quantum dot, and Fig. 4 is carbon quantum dot-high molecular fluorescence results of carbon nitrogen,
Show that this composite can also absorb infrared light emission visible ray.Fig. 5 is that carbon quantum dot-carbon nitrogen macromolecule exists
Infrared light declines the result solving methyl orange, it is seen that this composite effectively can be degraded methyl under infrared light
Orange.
Embodiment 2:
9g glucose is placed in the NaOH solution that concentration is 0.1mol/L of 100ml, and uses ultrasound wave
Process (KQ-00KED type high power numerical control ultrasonic cleaner) half an hour, obtain orange carbon quantum dot solution；
In the aqueous solution of the tripolycyanamide that above-mentioned carbon quantum dot solution 8ml is joined 40ml, tripolycyanamide aqueous solution
The ratio being dissolved in 40ml deionized water according to 1g tripolycyanamide configures, and stirs and makes its mix homogeneously in 2 hours,
Then it is evaporated at 80 DEG C；Sample will be evaporated and put in Muffle furnace, roasting 2 hours at 450 DEG C, prepare
Carbon quantum dot-carbon nitrogen macromolecule is combined infrared light catalyst.It is combined with obtained carbon quantum dot-carbon nitrogen macromolecule
Infrared light catalyst is degraded 4mg/L methyl orange 4 hours under infrared lamp irradiates, and degradation rate is 90%, shows
Can degrade under this material infrared light methyl orange.
Fig. 6 is carbon quantum dot-high molecular electromicroscopic photograph of carbon nitrogen, black in white circle circle segment in figure
Color blur portion is the aggregation of carbon quantum dot.
Embodiment 3:
8g glucose is placed in the NaOH solution that concentration is 0.2mol/L of 100ml, and uses ultrasound wave
Process (KQ-00KED type high power numerical control ultrasonic cleaner) half an hour, obtain orange carbon quantum dot solution；
In the aqueous solution of the tripolycyanamide that above-mentioned carbon quantum dot solution 8ml is joined 40ml, tripolycyanamide aqueous solution
The ratio being dissolved in 40ml deionized water according to 1g tripolycyanamide configures, and stirs and makes its mix homogeneously in 2 hours,
Then it is evaporated at 80 DEG C；Sample will be evaporated and put in Muffle furnace, roasting 2 hours at 450 DEG C, prepare
Carbon quantum dot-carbon nitrogen macromolecule is combined infrared light catalyst.It is combined with obtained carbon quantum dot-carbon nitrogen macromolecule
Infrared light catalyst is degraded 4mg/L methyl orange 4 hours under infrared lamp irradiates, and degradation rate is 90%, shows
Can degrade under this material infrared light methyl orange.
Fig. 7 is carbon quantum dot-high molecular electromicroscopic photograph of carbon nitrogen, black in white circle circle segment in figure
Color blur portion is the aggregation of carbon quantum dot.
Embodiment 4:
9g glucose is placed in the NaOH solution that concentration is 0.2mol/L of 100ml, and uses ultrasound wave
Process (KQ-00KED type high power numerical control ultrasonic cleaner) half an hour, obtain orange carbon quantum dot solution；
In the aqueous solution of the tripolycyanamide that above-mentioned carbon quantum dot solution 8ml is joined 40ml, tripolycyanamide aqueous solution
The ratio being dissolved in 40ml deionized water according to 1g tripolycyanamide configures, and stirs and makes its mix homogeneously in 2 hours,
Then it is evaporated at 80 DEG C；Sample will be evaporated and put in Muffle furnace, roasting 2 hours at 450 DEG C, prepare
Carbon quantum dot-carbon nitrogen macromolecule is combined infrared light catalyst.It is combined with obtained carbon quantum dot-carbon nitrogen macromolecule
Infrared light catalyst is degraded 4mg/L methyl orange 4 hours under infrared lamp irradiates, and degradation rate is 90%, shows
Can degrade under this material infrared light methyl orange.
Fig. 8 is carbon quantum dot-high molecular electromicroscopic photograph of carbon nitrogen, black in white circle circle segment in figure
Color blur portion is the aggregation of carbon quantum dot.
Embodiment 5:
8g glucose is placed in the NaOH solution that concentration is 0.1mol/L of 100ml, and uses ultrasound wave
Process (KQ-00KED type high power numerical control ultrasonic cleaner) half an hour, obtain orange carbon quantum dot solution；
In the aqueous solution of the tripolycyanamide that above-mentioned carbon quantum dot solution 9ml is joined 40ml, tripolycyanamide aqueous solution
The ratio being dissolved in 40ml deionized water according to 1g tripolycyanamide configures, and stirs and makes its mix homogeneously in 2 hours,
Then it is evaporated at 80 DEG C；Sample will be evaporated and put in Muffle furnace, roasting 2 hours at 450 DEG C, prepare
Carbon quantum dot-carbon nitrogen macromolecule is combined infrared light catalyst.It is combined with obtained carbon quantum dot-carbon nitrogen macromolecule
Infrared light catalyst is degraded 4mg/L methyl orange 4 hours under infrared lamp irradiates, and degradation rate is 90%, shows
Can degrade under this material infrared light methyl orange.
Fig. 9 is carbon quantum dot-high molecular electromicroscopic photograph of carbon nitrogen, the black in white circle circle segment in figure
Blur portion is the aggregation of carbon quantum dot.
Embodiment 6:
9g glucose is placed in the NaOH solution that concentration is 0.1mol/L of 100ml, and uses ultrasound wave
Process (KQ-00KED type high power numerical control ultrasonic cleaner) half an hour, obtain orange carbon quantum dot solution；
In the aqueous solution of the tripolycyanamide that above-mentioned carbon quantum dot solution 9ml is joined 40ml, tripolycyanamide aqueous solution
The ratio being dissolved in 40ml deionized water according to 1g tripolycyanamide configures, and stirs and makes its mix homogeneously in 2 hours,
Then it is evaporated at 80 DEG C；Sample will be evaporated and put in Muffle furnace, roasting 2 hours at 450 DEG C, prepare
Carbon quantum dot-carbon nitrogen macromolecule is combined infrared light catalyst.It is combined with obtained carbon quantum dot-carbon nitrogen macromolecule
Infrared light catalyst is degraded 4mg/L methyl orange 4 hours under infrared lamp irradiates, and degradation rate is 90%, shows
Can degrade under this material infrared light methyl orange.
Figure 10 is carbon quantum dot-high molecular electromicroscopic photograph of carbon nitrogen, black in white circle circle segment in figure
Color blur portion is the aggregation of carbon quantum dot.
Embodiment 7:
8g glucose is placed in the NaOH solution that concentration is 0.2mol/L of 100ml, and uses ultrasound wave
Process (KQ-00KED type high power numerical control ultrasonic cleaner) half an hour, obtain orange carbon quantum dot solution；
In the aqueous solution of the tripolycyanamide that above-mentioned carbon quantum dot solution 9ml is joined 40ml, tripolycyanamide aqueous solution
The ratio being dissolved in 40ml deionized water according to 1g tripolycyanamide configures, and stirs and makes its mix homogeneously in 2 hours,
Then it is evaporated at 80 DEG C；Sample will be evaporated and put in Muffle furnace, roasting 2 hours at 450 DEG C, prepare
Carbon quantum dot-carbon nitrogen macromolecule is combined infrared light catalyst.It is combined with obtained carbon quantum dot-carbon nitrogen macromolecule
Infrared light catalyst is degraded 4mg/L methyl orange 4 hours under infrared lamp irradiates, and degradation rate is 90%, shows
Can degrade under this material infrared light methyl orange.
Figure 11 is carbon quantum dot-high molecular electromicroscopic photograph of carbon nitrogen, black in white circle circle segment in figure
Color blur portion is the aggregation of carbon quantum dot.
Embodiment 8:
9g glucose is placed in the NaOH solution that concentration is 0.2mol/L of 100ml, and uses ultrasound wave
Process (KQ-00KED type high power numerical control ultrasonic cleaner) half an hour, obtain orange carbon quantum dot solution；
In the aqueous solution of the tripolycyanamide that above-mentioned carbon quantum dot solution 9ml is joined 40ml, tripolycyanamide aqueous solution
The ratio being dissolved in 40ml deionized water according to 1g tripolycyanamide configures, and stirs and makes its mix homogeneously in 2 hours,
Then it is evaporated at 80 DEG C；Sample will be evaporated and put in Muffle furnace, roasting two hours at 450 DEG C, prepare
Carbon quantum dot-carbon nitrogen macromolecule is combined infrared light catalyst.It is combined with obtained carbon quantum dot-carbon nitrogen macromolecule
Infrared light catalyst is degraded 4mg/L methyl orange 4 hours under infrared lamp irradiates, and degradation rate is 90%, shows
Can degrade under this material infrared light methyl orange.
Figure 12 is carbon quantum dot-high molecular electromicroscopic photograph of carbon nitrogen, black in white circle circle segment in figure
Color blur portion is the aggregation of carbon quantum dot.
Embodiment 9:
8g glucose is placed in the NaOH solution that concentration is 0.1mol/L of 100ml, and uses ultrasound wave
Process (KQ-00KED type high power numerical control ultrasonic cleaner) half an hour, obtain orange carbon quantum dot solution；
In the aqueous solution of the tripolycyanamide that above-mentioned carbon quantum dot solution 9ml is joined 40ml, tripolycyanamide aqueous solution
The ratio being dissolved in 40ml deionized water according to 1g tripolycyanamide configures, and stirs and makes its mix homogeneously in 2 hours,
Then it is evaporated at 80 DEG C；Sample will be evaporated and put in Muffle furnace, roasting 2 hours at 450 DEG C, prepare
Carbon quantum dot-carbon nitrogen macromolecule is combined infrared light catalyst.It is combined with obtained carbon quantum dot-carbon nitrogen macromolecule
Infrared light catalyst is degraded 4mg/L methyl orange 3 hours under infrared lamp irradiates, and degradation rate is 80%, shows
Can also degrade under this material infrared light methyl orange.
Figure 13 is that carbon quantum dot-carbon nitrogen macromolecule infrared light declines the result solving methyl orange.
Embodiment 10:
9g glucose is placed in the NaOH solution that concentration is 0.1mol/L of 100ml, and uses at ultrasound wave
Manage (KQ-00KED type high power numerical control ultrasonic cleaner) half an hour, obtain orange carbon quantum dot solution；
In the aqueous solution of the tripolycyanamide that above-mentioned carbon quantum dot solution 9ml is joined 40ml, tripolycyanamide aqueous solution
The ratio being dissolved in 40ml deionized water according to 1g tripolycyanamide configures, and stirs and makes its mix homogeneously in 2 hours,
Then it is evaporated at 80 DEG C；Sample will be evaporated and put in Muffle furnace, roasting 2 hours at 450 DEG C, prepare
Carbon quantum dot-carbon nitrogen macromolecule is combined infrared light catalyst.It is combined with obtained carbon quantum dot-carbon nitrogen macromolecule
Infrared light catalyst is degraded 4mg/L methyl orange 3 hours under infrared lamp irradiates, and degradation rate is 80%, shows
Can also degrade under this material infrared light methyl orange.
Figure 14 is that carbon quantum dot-carbon nitrogen macromolecule infrared light declines the result solving methyl orange.
Embodiment 11:
8g glucose is placed in the NaOH solution that concentration is 0.2mol/L of 100ml, and uses at ultrasound wave
Manage (KQ-00KED type high power numerical control ultrasonic cleaner) half an hour, obtain orange carbon quantum dot solution；
In the aqueous solution of the tripolycyanamide that above-mentioned carbon quantum dot solution 9ml is joined 40ml, tripolycyanamide aqueous solution
The ratio being dissolved in 40ml deionized water according to 1g tripolycyanamide configures, and stirs and makes its mix homogeneously in 2 hours,
Then it is evaporated at 80 DEG C；Sample will be evaporated and put in Muffle furnace, roasting 2 hours at 450 DEG C, prepare
Carbon quantum dot-carbon nitrogen macromolecule is combined infrared light catalyst.It is combined with obtained carbon quantum dot-carbon nitrogen macromolecule
Infrared light catalyst is degraded 4mg/L methyl orange 3 hours under infrared lamp irradiates, and degradation rate is 80%, shows
Can also degrade under this material infrared light methyl orange.
Figure 15 is that carbon quantum dot-carbon nitrogen macromolecule infrared light declines the result solving methyl orange.
Embodiment 12:
9g glucose is placed in the NaOH solution that concentration is 0.2mol/L of 100ml, and uses ultrasound wave
Process (KQ-00KED type high power numerical control ultrasonic cleaner) half an hour, obtain orange carbon quantum dot solution；
In the aqueous solution of the tripolycyanamide that above-mentioned carbon quantum dot solution 9ml is joined 40ml, tripolycyanamide aqueous solution
The ratio being dissolved in 40ml deionized water according to 1g tripolycyanamide configures, and stirs and makes its mix homogeneously in 2 hours,
Then it is evaporated at 80 DEG C；Sample will be evaporated and put in Muffle furnace, roasting two hours at 450 DEG C, prepare
Carbon quantum dot-carbon nitrogen macromolecule is combined infrared light catalyst.It is combined with obtained carbon quantum dot-carbon nitrogen macromolecule
Infrared light catalyst is degraded 4mg/L methyl orange 3 hours under infrared lamp irradiates, and degradation rate is 80%, shows
Can also degrade under this material infrared light methyl orange.
Figure 16 is that carbon quantum dot-carbon nitrogen macromolecule infrared light declines the result solving methyl orange.
Claims (2)
1. synthesize carbon quantum dot-carbon nitrogen macromolecule and be combined a preparation method for infrared light catalyst, the steps include:
(1) there is the carbon quantum dot of up-conversion luminescence property with glucose synthesis；The step wherein synthesizing carbon quantum dot is: be placed in the NaOH solution that 100mL concentration is 0.1-0.2mol/L by 8-9g glucose, and uses ultrasonic Treatment half an hour, obtains orange carbon quantum dot solution；
(2) being joined by a certain amount of carbon quantum dot solution in the aqueous solution of tripolycyanamide, stirring makes it uniformly mix, and is then evaporated at 80 DEG C；Wherein prepare carbon quantum dot-tripolycyanamide aggregate sample, for the carbon quantum dot obtained in step (1) solution 8-9mL being joined in the tripolycyanamide aqueous solution of 40mL, the ratio that tripolycyanamide aqueous solution is dissolved in 40mL deionized water according to 1g tripolycyanamide configures, stir and within 2 hours, make its mix homogeneously, be then evaporated at 80 DEG C；
(3) putting in Muffle furnace by the sample that is evaporated in step (2), under 450 DEG C of air atmosphere, heating is evaporated the sample 2 hours of gained, prepares carbon quantum dot-carbon nitrogen macromolecule and is combined infrared light catalyst.
Synthesis carbon quantum dot the most according to claim 1-carbon nitrogen macromolecule is combined the preparation method of infrared light catalyst, it is characterized in that, it is combined infrared light catalyst with obtained carbon quantum dot-carbon nitrogen macromolecule and degrades after 4mg/L methyl orange 4 hours under infrared lamp irradiates, the methyl orange of more than 80% can be degraded, and shows that this material can be degraded methyl orange under infrared light effectively.
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| CN108706559B (en) * | 2018-05-30 | 2020-04-07 | 安徽大学 | Preparation method of graphite phase carbon nitride material |
| CN109395763B (en) * | 2018-12-14 | 2021-11-09 | 山东大学 | Sulfur-doped g-C3N4C-dot porous composite photocatalyst and preparation method and application thereof |
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