CN108940344A - Modified graphite phase carbon nitride photochemical catalyst and its preparation method and application - Google Patents
Modified graphite phase carbon nitride photochemical catalyst and its preparation method and application Download PDFInfo
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- CN108940344A CN108940344A CN201810834707.0A CN201810834707A CN108940344A CN 108940344 A CN108940344 A CN 108940344A CN 201810834707 A CN201810834707 A CN 201810834707A CN 108940344 A CN108940344 A CN 108940344A
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- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
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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
-
- B01J35/23—
-
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/36—Organic compounds containing halogen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/40—Organic compounds containing sulfur
-
- 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 discloses a kind of modified graphite phase carbon nitride photochemical catalysts and its preparation method and application, the modified graphite phase carbon nitride photochemical catalyst is prepared using urea and salicylic acid as raw material by calcining, and wherein urea and salicylic mass ratio are 1: 0.002~0.02.Modified graphite phase carbon nitride photochemical catalyst of the present invention has many advantages, such as that specific surface area is high, reactivity site is more, light abstraction width is wide, electron-hole pair recombination rate is low, photocatalysis performance is good, there are good application value and application prospect, preparation method has many advantages, such as that simple process, raw material sources are wide, low in cost, preparation efficiency is high, yield is high, it is suitable for large scale preparation, is conducive to industrialized production.Modified graphite phase carbon nitride photochemical catalyst of the present invention can be used for degradable organic pollutant, have many advantages, such as that simple process, easy to operate, low in cost, treatment effeciency is high, good degrading effect, and all have preferable degradation effect for various organic pollutants.
Description
Technical field
The invention belongs to material preparation and the technical fields of environmental catalysis, are related to a kind of system of nitride porous carbon photochemical catalyst
A kind of Preparation Method, and in particular to modified graphite phase carbon nitride photochemical catalyst and its preparation method and application.
Background technique
In the past few decades, there is a growing awareness that environmental problem is increasingly serious.As the main of environmental pollution
The water pollution of source, industrial organic chemicals and agricultural fertilizer discharge has become urgent problem to be solved.In natural and waste water
Observe persistence organic micro-pollutants, such as drug and personal care product, insecticide and herbicide.Traditional wastewater handles skill
Art is difficult to handle emerging pollutant.Photocatalysis technology is proved to be a kind of ideal solution route, it can use solar energy.Light
Catalysis technique is a kind of technology that catalysis reaction occurs under light illumination using photochemical catalyst, anti-between usually a variety of phases
It answers, is a kind of green technology for having important application prospect in the energy and environmental area.
Nonmetallic polymer-graphite carbonitride (PCN) causes the very big emerging of people due to its chemical and thermal stability
Interest.In recent years, in environment remediation, water decomposition, carbon dioxide discharge-reduction and synthetic organic chemistry, there are many applications by PCN.But
Current carbonitride is still there are many disadvantage, and such as specific surface area is lower, light absorption is poor and photo-generated carrier is easy rapid electric charge
Recombination.Currently, having the doping of metallic element or nonmetalloid to the method for PCN modification, constructing heterojunction semiconductor and being total to
Poly-, wherein modification by copolymerization is a kind of relatively good method of modifying, however, the modified graphite phase carbon nitride as made from modification by copolymerization is still
So have the following problems: specific surface area is low, reactivity site is few, absorbing properties are insufficient, photo-generated carrier is easy recombination, electricity
To recombination rate height, catalytic degradation performance deficiency etc., the presence of these problems seriously limits answering for graphite phase carbon nitride in son-hole
Use range.In addition, there are still complex process, raw materials to be difficult to obtain in existing copolymerization modification method, cost of material height, prepares effect
The disadvantages of rate is poor, low yield, the presence of this problem also limit modification by copolymerization prepare it is extensive in modified graphite phase carbon nitride
Using.Therefore, how effectively to overcome the above problem, obtain a kind of surface area is high, reactivity site is more, light abstraction width is wide,
The modified graphite phase carbon nitride photochemical catalyst and matched work that electron-hole pair recombination rate is low, photocatalysis performance is good
The preparation for the modified graphite phase carbon nitride photochemical catalyst that skill is simple, raw material sources are wide, low in cost, preparation efficiency is high, yield is high
Method, the application range for improving graphite phase carbon nitride are of great significance.
Summary of the invention
The technical problem to be solved by the present invention is in view of the deficienciess of the prior art, provide a kind of specific surface area it is high,
The modified graphite that reactivity site is more, light abstraction width is wide, electron-hole pair recombination rate is low, photocatalysis performance is good mutually nitrogenizes
Carbon photochemical catalyst additionally provides a kind of simple process, the modification stone that raw material sources are wide, low in cost, preparation efficiency is high, yield is high
The preparation method of black phase carbon nitride photochemical catalyst.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A kind of modified graphite phase carbon nitride photochemical catalyst, the modified graphite phase carbon nitride photochemical catalyst are with urea and salicylic acid
Raw material is prepared by calcining；The urea and salicylic mass ratio are 1: 0.002~0.02.
The inventive concept total as one, the present invention also provides a kind of preparations of modified graphite phase carbon nitride photochemical catalyst
Method, comprising the following steps:
S1, urea and salicylic acid are dissolved in solvent, are stirred, drying obtains presoma；
S2, presoma obtained in step S1 is calcined, is ground after cooling, obtains modified graphite phase carbon nitride photocatalysis
Agent.
Above-mentioned preparation method, further improved, in the step S1, the urea and salicylic mass ratio are 1:
0.002~0.02.
Above-mentioned preparation method, it is further improved, in the step S1, the solvent be water, ethyl alcohol, in methanol extremely
Few one kind；The time of the stirring is 1h~5h；The drying carries out at being 70 DEG C~100 DEG C in temperature；The drying when
Between be 5h~10h.
Above-mentioned preparation method, further improved, in the step S2, the heating rate in the calcination process is 5
DEG C/min~20 DEG C/min.
Above-mentioned preparation method, further improved, in the step S2, the calcining is 450 DEG C~600 DEG C in temperature
It carries out；The time of the calcining is 2h~5h.
The inventive concept total as one, the present invention also provides a kind of above-mentioned modified graphite phase carbon nitride photochemical catalysts
Or application of the modified graphite phase carbon nitride photochemical catalyst in degradable organic pollutant made from above-mentioned preparation method.
Above-mentioned application, it is further improved, using organic in modified graphite phase carbon nitride photocatalyst for degrading water body
Pollutant, comprising the following steps:
Modified graphite phase carbon nitride photochemical catalyst is mixed with organic pollutant wastewater, stirs, light is carried out in visible light environment
Catalysis reaction, completes the degradation to Organic Pollutants in Wastewater；The modified graphite phase carbon nitride photochemical catalyst and organic contamination
The mass ratio of organic pollutant in object waste water is 50~200: 1.
Above-mentioned application, further improved, the organic pollutant in the organic pollutant wastewater is dyestuff or antibiosis
Element；The dyestuff is rhodamine B or acid orange G；The antibiotic is tetracycline antibiotics, sulfa antibiotics, xacin-series
At least one of antibiotic；The tetracycline antibiotics are tetracycline；The sulfa antibiotics are that sulfanilamide (SN) dimethyl is phonetic
Pyridine；The xacin-series antibiotic is Ciprofloxacin or lavo-ofloxacin.
Above-mentioned application, further improved, the time of the stirring is 1h~2h；The light source of the visible light is the sun
Light, xenon lamp or LED light；The time of the light-catalyzed reaction is 60min~120min.
Compared with the prior art, the advantages of the present invention are as follows:
(1) the present invention provides a kind of modified graphite phase carbon nitride photochemical catalysts, pass through calcining using urea and salicylic acid as raw material
It is prepared, wherein urea and salicylic mass ratio are 1: 0.002~0.02.It is original with urea and salicylic acid in the present invention
Material realizes self assembly copolymerization by calcining, and since salicylic acid has carboxyl abundant and hydroxyl, these oxygen-containing functional groups can be with
Amino on urea forms intermolecular hydrogen bonding, helps to realize oxygen doping, and salicylic acid has stable aromatic ring structure, the aromatic ring
Structure plays the role of shifting electronics in carbonitride system, can promote the electronics transfer on carbonitride, while salicylic acid category
In acidulous material, there is preferable facilitation in the protonation for adjusting carbonitride, be conducive to the migration of light induced electron, because
And using bigcatkin willow acid molecule to nanoscale twins g-C in self assembly polymerization process3N4Conjugated structure carry out precision regulation, no
Only enhance catalyst surface mass transport process, transfers quickly electronics to surface out of caltalyst, while can also reduce and partly lead
Body band gap width improves the utilization rate and photocatalysis efficiency of electronics to reduce the recombination rate of electron-hole pair.At the same time,
Salicylic addition can change the structure and pattern of graphite phase carbon nitride in calcination process, make the piece thickness of graphite phase carbon nitride
Degree is thinner, and can make occur nano-pore not of uniform size in graphite phase carbon nitride nanometer sheet, so that unique pore structure is obtained,
The specific surface area of graphite phase carbon nitride photochemical catalyst can not only be improved, improves reactivity number of sites amount, while can also widen
Light absorption wavelength improves light utilization efficiency.In addition, with the increase of salicylic acid dosage, obtained modified graphite phase carbon nitride
Absorbing band gap also becomes smaller and smaller, so that more visible lights can be absorbed in modified graphite phase carbon nitride.The present invention changes
Property graphite phase carbon nitride photochemical catalyst have that specific surface area is high, reactivity site is more, light abstraction width is wide, electron-hole pair
The advantages that recombination rate is low, photocatalysis performance is good can be widely applied for degradable organic pollutant, and can obtain preferable degradation effect
Fruit has good application value and application prospect.
(2) the present invention provides a kind of preparation methods of modified graphite phase carbon nitride photochemical catalyst, with urea and salicylic acid
Modified graphite phase carbon nitride photochemical catalyst is prepared by calcining for raw material.In the present invention, for the first time by urea and salicylic acid with
Combined polymerization mode is introduced into the preparation of graphite phase carbon nitride, its advantage is that simple process, easy to operate, raw material be easy to get, at
This cheap and obtained photochemical catalyst is nontoxic, and industrialized production easy to accomplish has biggish application prospect, especially in light
Catalytic field.Preparation method of the present invention has that simple process, that raw material sources are wide, low in cost, preparation efficiency is high, yield is high etc. is excellent
Point, is suitable for large scale preparation, is conducive to industrialized production.
(3) the present invention also provides a kind of modified graphite phase carbon nitride photochemical catalyst answering in degradable organic pollutant
With as utilized the organic pollutant in modified graphite phase carbon nitride photocatalyst for degrading water body, by the way that modified graphite is mutually nitrogenized
Carbon photochemical catalyst mixes the effective drop that can be realized by stirring, light-catalyzed reaction to organic pollutant with organic pollutant wastewater
Solution, has many advantages, such as that simple process, easy to operate, low in cost, treatment effeciency is high, good degrading effect, and for various organic
Pollutant all has preferable degradation effect.
Detailed description of the invention
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical scheme in the embodiment of the invention is clearly and completely described.
Fig. 1 is modified graphite phase carbon nitride photochemical catalyst (CN-SA-0.02, CN- obtained in 1-3 of the embodiment of the present invention
SA-0.05, CN-SA-0.1) and comparative example 1 in carbon nitride photocatalyst (PCN) obtained XRD diagram.
Fig. 2 is modified graphite phase carbon nitride photochemical catalyst (CN-SA-0.02, CN- obtained in 1-3 of the embodiment of the present invention
SA-0.05, CN-SA-0.1) and comparative example 1 in carbon nitride photocatalyst (PCN) obtained FT-IR figure.
Fig. 3 is modified graphite phase carbon nitride photochemical catalyst (CN-SA-0.02, CN- obtained in 1-3 of the embodiment of the present invention
SA-0.05, CN-SA-0.1) and comparative example 1 in carbon nitride photocatalyst (PCN) obtained DRS figure.
Fig. 4 is modified graphite phase carbon nitride photochemical catalyst (CN-SA-0.05) obtained in the embodiment of the present invention 2 and comparison
The SEM figure of carbon nitride photocatalyst (PCN) obtained in example 1, wherein (a) is PCN, it (b) is CN-SA-0.05.
Fig. 5 is modified graphite phase carbon nitride photochemical catalyst (CN-SA-0.05) obtained in the embodiment of the present invention 2 and comparison
The TEM figure of carbon nitride photocatalyst (PCN) obtained in example 1, wherein (a) is PCN, it (b) is CN-SA-0.05.
Fig. 6 be the embodiment of the present invention 4 in modified graphite phase carbon nitride photochemical catalyst (CN-SA-0.02, CN-SA-0.05,
CN-SA-0.1) and in comparative example 1 carbon nitride photocatalyst (PCN) degrade under visible light tetracycline when it is corresponding when it is m-
Degradation efficiency figure.
Specific embodiment
Below in conjunction with Figure of description and specific preferred embodiment, the invention will be further described, but not therefore and
It limits the scope of the invention.
In following present invention embodiment, unless otherwise noted, used material and instrument are commercially available, used technique
For common process, used equipment is conventional equipment, and the data obtained is the average value for repeating experiment more than three times.
Embodiment 1:
A kind of modified graphite phase carbon nitride photochemical catalyst is prepared using urea and salicylic acid as raw material by calcining, urea and
Salicylic mass ratio is 1: 0.002, and preparation method includes the following steps:
Take 10g urea and 0.02g salicylic acid, grind, be dissolved in 20mL water, stir 2h, on electrothermal furnace drying (be in temperature
Dry 10h at 80 DEG C), obtain presoma.Presoma is placed in Muffle furnace, is heated to 550 with 15 DEG C/min of heating rate
DEG C, and presoma is calcined in 550 DEG C of heat preservation 2h, realize combined polymerization to obtain modified graphite phase carbon nitride by calcining
Photochemical catalyst takes out block after natural cooling, and grinding obtains modified graphite phase carbon nitride photochemical catalyst, is named as CN-
SA-0.02。
Embodiment 2:
A kind of modified graphite phase carbon nitride photochemical catalyst is prepared using urea and salicylic acid as raw material by calcining, urea and
Salicylic mass ratio be 1: 0.005, preparation method specifically includes the following steps:
10g urea and 0.05g salicylic acid are taken, grinds, is dissolved in 20mL water, 2h is stirred, is dried on electrothermal furnace, obtain forerunner
Body.Presoma is placed in Muffle furnace, is heated to 550 DEG C with 15 DEG C/min of heating rate, and keep the temperature 2h pairs at 550 DEG C
Presoma is calcined, and realizes combined polymerization to obtain modified graphite phase carbon nitride photochemical catalyst, to natural cooling by calcining
Block is taken out afterwards, is ground, is obtained modified graphite phase carbon nitride photochemical catalyst, be named as CN-SA-0.05.
Embodiment 3:
A kind of modified graphite phase carbon nitride photochemical catalyst is prepared using urea and salicylic acid as raw material by calcining, urea and
Salicylic mass ratio is 1: 0.01, and preparation method includes the following steps:
10g urea and 0.1g salicylic acid are taken, grinds, is dissolved in 20mL water, 2h is stirred, is dried on electrothermal furnace, obtain forerunner
Body.Presoma is placed in Muffle furnace, is heated to 550 DEG C with 15 DEG C/min of heating rate, and in 550 DEG C of heat preservation 2h to preceding
It drives body to be calcined, combined polymerization is realized to obtain modified graphite phase carbon nitride photochemical catalyst, after natural cooling by calcining
Block is taken out, is ground, is obtained modified graphite phase carbon nitride photochemical catalyst, be named as CN-SA-0.1.
Comparative example 1:
The preparation method of traditional carbon nitride photocatalyst (PCN), comprising the following steps:
It takes 10g urea to be put into crucible, is placed in tube furnace, be heated to 550 DEG C with 15 DEG C/min of heating rate, and
550 DEG C of heat preservation 2h, are drawn off after natural cooling, with mortar grinder, obtain yellow powder sample, as carbonitride photocatalysis
Agent is named as PCN.
Fig. 1 is modified graphite phase carbon nitride photochemical catalyst (CN-SA-0.02, CN- obtained in 1-3 of the embodiment of the present invention
SA-0.05, CN-SA-0.1) and comparative example 1 in carbon nitride photocatalyst (PCN) obtained XRD diagram.It can be sent out from Fig. 1
It is existing, occur two XRD diffraction for significantly belonging to graphite phase carbon nitride (100) and (002) crystal face at 13.0 ° and 27.5 °
Peak, it was demonstrated that the product of preparation is g-C3N4.It is obtained in embodiment 1-3 relative to the carbon nitride photocatalyst (PCN) of comparative example 1
27.5 ° of peak intensities of modified graphite phase carbon nitride photochemical catalyst are more and more weaker, illustrate the increase with salicylic acid dosage, lamella
It thins down.
Fig. 2 is modified graphite phase carbon nitride photochemical catalyst (CN-SA-0.02, CN- obtained in 1-3 of the embodiment of the present invention
SA-0.05, CN-SA-0.1) and comparative example 1 in carbon nitride photocatalyst (PCN) obtained FT-IR figure.It can be sent out from Fig. 2
It is existing, 3000-3500cm-1、1200-1600cm-1And 800cm-1It is respectively belonging to NH2, NH stretching vibration, aromatic carbon azacyclo-
(seven piperazine rings, C6N7) C-N, C=N stretching vibration and seven piperazine rings vibration, this illustrates carbonitride light relative to comparative example 1
Catalyst (PCN), the present invention reduce the orderly of graphite phase carbon nitride chemical structure by introducing salicylic acid to a certain extent
Property.
Fig. 3 is modified graphite phase carbon nitride photochemical catalyst (CN-SA-0.02, CN- obtained in 1-3 of the embodiment of the present invention
SA-0.05, CN-SA-0.1) and comparative example 1 in carbon nitride photocatalyst (PCN) obtained DRS figure.It can from Fig. 3
Out, the absorbing wavelength of the carbon nitride photocatalyst (PCN) of comparative example 1 is in 462 nm or so, the modified graphite of embodiment 1-3 preparation
The absorbing wavelength band of phase carbon nitride photochemical catalyst (CN-SA-0.02, CN-SA-0.05, CN-SA-0.1) is with salicylic addition
Gradually red shift is measured, absorbing wavelength widens the absorption region for increasing light to 510 nm or more, improves the utilization rate of light.In addition,
The specific surface area of carbon nitride photocatalyst (PCN) obtained is 40 m in comparative example 12/ g, and modification obtained in embodiment 2
The specific surface area of graphite phase carbon nitride photochemical catalyst (CN-SA-0.05) is 79 m2/g。
Fig. 4 is modified graphite phase carbon nitride photochemical catalyst (CN-SA-0.05) obtained in the embodiment of the present invention 2 and comparison
The SEM figure of carbon nitride photocatalyst (PCN) obtained in example 1, wherein (a) is PCN, it (b) is CN-SA-0.05.Fig. 5 is this hair
Carbonitride obtained in modified graphite phase carbon nitride photochemical catalyst (CN-SA-0.05) obtained and comparative example 1 in bright embodiment 2
The TEM of photochemical catalyst (PCN) schemes, wherein (a) is PCN, it (b) is CN-SA-0.05.As can be seen that comparative example 1 from Figure 4 and 5
In carbon nitride photocatalyst (PCN) obtained, nanometer sheet the smooth of the edge, and modified graphite obtained mutually nitrogenizes in embodiment 2
There is nano-pore not of uniform size in carbon photochemical catalyst (CN-SA-0.05), nanometer sheet, this illustrates that salicylic addition changes
The nanostructure and pattern of catalyst.
Embodiment 4:
A kind of application of modified graphite phase carbon nitride photochemical catalyst in degradable organic pollutant, specially utilizes modified graphite phase
Organic pollutant in carbon nitride photocatalyst degradation water body, comprising the following steps:
Modified graphite phase carbon nitride photochemical catalyst (CN-SA-0.02, CN-SA-0.05, CN-SA- obtained in Example 1-3
0.1) and comparative example 1 in carbon nitride photocatalyst (PCN) obtained, each 100mg, be respectively placed in 100mL, concentration 20mg/L four
In ring element solution, (darkroom) is stirred 60 minutes in a dark environment, is reached adsorption equilibrium, is subsequently placed in visible light source (xenon lamp)
Light-catalyzed reaction is carried out, the degradation to Organic Pollutants In Water is completed.
During light-catalyzed reaction, takes 4mL tetracycline within every 10 minutes, measured with ultraviolet-visible spectrophotometer molten
The characteristic peaks of tetracycline in liquid calculate different catalysts under the conditions of different time to the degradation efficiency of tetracycline.
Fig. 6 be the embodiment of the present invention 4 in modified graphite phase carbon nitride photochemical catalyst (CN-SA-0.02, CN-SA-0.05,
CN-SA-0.1) and carbon nitride photocatalyst (PCN) degrade under visible light tetracycline when it is corresponding when m- degradation efficiency
Figure.As shown in fig. 6, after illumination 1 hour, the degradation efficiency of carbon nitride photocatalyst (PCN) obtained to tetracycline in comparative example 1
It is 50%, and modified graphite phase carbon nitride photochemical catalyst (CN-SA-0.02, CN-SA-0.05, CN-SA-0.1) is to the drop of tetracycline
Solving efficiency is respectively 75%, 85% and 80%.By comparing it is found that the present invention significantly improves the degradation efficiency of organic pollutant, energy
The organic pollutant in water body is enough effectively removed, it is better that this also illustrates that modified graphite phase carbon nitride photochemical catalyst of the present invention has
Photocatalytic activity.
It is in Fig. 1-6 the result shows that, the salicylic acid of addition can change the structure of catalyst, pattern, lamellar spacing, chemistry
Structural order, extinction wave-length coverage, thus the modified graphite phase carbon nitride photochemical catalyst as made from urea and salicylic acid has
It is excellent that specific surface area is high, reactivity site is more, light abstraction width is wide, electron-hole pair recombination rate is low, photocatalysis performance is good etc.
Point.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example.All technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It is noted that for the art
Those of ordinary skill for, improvements and modifications without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of modified graphite phase carbon nitride photochemical catalyst, which is characterized in that the modified graphite phase carbon nitride photochemical catalyst with
Urea and salicylic acid are that raw material is prepared by calcining；The urea and salicylic mass ratio are 1: 0.002~0.02.
2. a kind of preparation method of modified graphite phase carbon nitride photochemical catalyst, which comprises the following steps:
S1, urea and salicylic acid are dissolved in solvent, are stirred, drying obtains presoma；
S2, presoma obtained in step S1 is calcined, is ground after cooling, obtains modified graphite phase carbon nitride photocatalysis
Agent.
3. preparation method according to claim 2, which is characterized in that in the step S1, the urea and salicylic
Mass ratio is 1: 0.002~0.02.
4. preparation method according to claim 2 or 3, which is characterized in that in the step S1, the solvent is water, second
At least one of alcohol, methanol；The time of the stirring is 1h~5h；The drying carries out at being 70 DEG C~100 DEG C in temperature；
The time of the drying is 5h~10h.
5. preparation method according to claim 2 or 3, which is characterized in that in the step S2, in the calcination process
Heating rate is 5 DEG C/min~20 DEG C/min.
6. preparation method according to claim 5, which is characterized in that in the step S2, the calcining is 450 in temperature
DEG C~600 DEG C of progress；The time of the calcining is 2h~5h.
7. a kind of modified graphite phase carbon nitride photochemical catalyst as described in claim 1 or claim 2 to 6 are described in any item
Application of the modified graphite phase carbon nitride photochemical catalyst in degradable organic pollutant made from preparation method.
8. application according to claim 7, which is characterized in that utilize modified graphite phase carbon nitride photocatalyst for degrading water body
In organic pollutant, comprising the following steps:
Modified graphite phase carbon nitride photochemical catalyst is mixed with organic pollutant wastewater, stirs, light is carried out in visible light environment
Catalysis reaction, completes the degradation to Organic Pollutants in Wastewater；The modified graphite phase carbon nitride photochemical catalyst and organic contamination
The mass ratio of organic pollutant in object waste water is 50~200: 1.
9. application according to claim 8, which is characterized in that the organic pollutant in the organic pollutant wastewater is dye
Material or antibiotic；The dyestuff is rhodamine B or acid orange G；The antibiotic is tetracycline antibiotics, sulfamido antibiosis
At least one of element, xacin-series antibiotic；The tetracycline antibiotics are tetracycline；The sulfa antibiotics are sulfanilamide (SN)
Dimethyl pyrimidine；The xacin-series antibiotic is Ciprofloxacin or lavo-ofloxacin.
10. application according to claim 8, which is characterized in that the time of the stirring is 1h~2h；The visible light
Light source is sunlight, xenon lamp or LED light；The time of the light-catalyzed reaction is 60min~120min.
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