CN109012643A - A kind of method of photocatalysis in-situ regeneration active carbon under visible light - Google Patents
A kind of method of photocatalysis in-situ regeneration active carbon under visible light Download PDFInfo
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- CN109012643A CN109012643A CN201810927510.1A CN201810927510A CN109012643A CN 109012643 A CN109012643 A CN 109012643A CN 201810927510 A CN201810927510 A CN 201810927510A CN 109012643 A CN109012643 A CN 109012643A
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/3441—Regeneration or reactivation by electric current, ultrasound or irradiation, e.g. electromagnetic radiation such as X-rays, UV, light, microwaves
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/3416—Regenerating or reactivating of sorbents or filter aids comprising free carbon, e.g. activated carbon
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Abstract
The invention discloses a kind of methods of photocatalysis in-situ regeneration active carbon under visible light, belong to active carbon regenerating technology field, comprising the following steps: 1) weigh a certain amount of SnI4It is added in 70 DEG C of water-bath, a certain amount of H is added2PtCl6Solution prepares SnO2- QDs/Pt photochemical catalyst, the load capacity of Pt are 2%-7%；2) by SnO2- QDs/Pt photochemical catalyst is dispersed in water phase, and the dispersion liquid that concentration is 1g/L is made；3) by SnO2- QDs/Pt photocatalyst dispersion liquid uniformly sprays on the activated carbon, and the load capacity of catalyst is 1%-20%；4) Photocatalytic Regeneration is carried out under visible light illumination.The in-situ regeneration rate of active carbon is high in the present invention, loses small, energy conservation and environmental protection, dramatically solves the problems, such as that current active carbon solid waste amount is big.
Description
Technical field
The invention belongs to SnO under active carbon regenerating technology field more particularly to a kind of visible light2- QDs/Pt photocatalysis is former
The method of position regenerated carbon.
Background technique
Active carbon is a kind of porous material, has very strong absorption property, and the good, mechanical strength with chemical stability
It is high, can acid and alkali-resistance, the advantages that not soluble in water and organic solvent, due to itself numerous excellent properties, be widely used in it is environmentally friendly,
The fields such as chemical industry, food processing, hydrometallurgy, military protection.Oneself is daily through becoming national economy and national defense construction and people
It lives essential staple product.With the fast development of industrial technology in world wide, environment in recent years pollution is increasingly tight
Weight, and active carbon increasingly shows wide application prospect at aspect of curbing environmental pollution.With active carbon manufacture scale and
No matter the continuous expansion of its application field considers that the regeneration for carrying out active carbon is all very necessary from economic or environmental angle.
The regeneration techniques of active carbon mainly have hot recycling method, wet air regeneration method, microwave-assisted regeneration method, biology at present
The methods of method of reproduction, supercritical oxidation process, electrochemical regeneration method, biofilm, solvent extraction method of reproduction, photocatalytic oxidation.
Photocatalysis technology is a kind of green technology that important application and development prospect are suffered from the energy and environmental area.As photocatalysis
The selection of the carrier of technology, catalyst has significant impact for the quality of catalytic performance.Quantum spot semiconductor is imitated due to quantum
The significant benefit of bring is answered, has become the hot spot of catalytic field research at present.The seminar of Zhou is by preparing TiO2/ Pt's
Catalyst has studied influence (ACS Catal.2016,6,7799-7809) of the composite material to CO oxidation activity.Also have one
A little researchers have studied TiO2The degradation behavior of/Pt composite material PARA FORMALDEHYDE PRILLS(91,95), achieves good research achievement
(Journal of the Taiwan Institute of Chemical Engineers.2015,50,276-281.,
Chinese Journal of Catalysis,2014,35,210-218.,Applied Catalysis B:
Environmental.2014,146,249-257).But it is domestic at present about under visible light using SnO2Quantum dot is negative
Carrying Pt catalyst original position regenerated carbon research aspect is still blank out.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of method of photocatalysis in-situ regeneration active carbon under visible light,
In-situ regeneration rate using the active carbon of this method preparation is high, loses small, energy conservation and environmental protection, dramatically solves current active carbon
The big problem of solid waste amount.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
A kind of method of photocatalysis in-situ regeneration active carbon under visible light, comprising the following steps:
1) by SnI4It is added in 70 DEG C of water-bath, while H is added2PtCl6Solution prepares SnO2- QDs/Pt photocatalysis
Agent, the load capacity of Pt are 2%-7%；
2) SnO that will be prepared in step 1)2- QDs/Pt photochemical catalyst is dispersed in water phase, and point that concentration is 1g/L is made
Dispersion liquid；
3) by the SnO in step 2)2- QDs/Pt photocatalyst dispersion liquid is equably sprayed or is infiltrated on the activated carbon,
SnO2The load capacity of-QDs/Pt catalyst dispersion is 1%-20%；
4) sample generated in step 3) is calcined into 3h at 300-500 DEG C；
5) visible light illumination at room temperature by sample calcined in step 4), is carried out, active carbon in-situ is regenerated.
Further, SnO2Quantum dot size is 1-5nm.
Further, in step 5), the time of illumination is 3-12h.
Further, the SnO2The pH value of-QDs/Pt photocatalyst dispersion liquid is 7~8.
Compared with prior art, the beneficial effects of the present invention are: the present invention uses simple preparation method, load capacity is obtained
For the SnO of 1%-20%2- QDs/Pt- coated active carbon composites system, using light-catalyzed reaction in-situ regeneration active carbon.The catalyst
Can make active carbon in dynamic testing process extends 3 times or more using the time, and the balance of static 3 loop test active carbons is again
Raw rate can reach 98% or more, this has very important significance in actual use for active carbon.
Detailed description of the invention
Fig. 1 is activated carbon supported SnO prepared by the present invention2The XRD diagram of-QDs/Pt catalyst and active carbon.
Fig. 2 is activated carbon supported SnO prepared by the present invention2The SEM of-QDs/Pt catalyst schemes.
Fig. 3 is the SEM figure of active carbon prepared by the present invention.
Fig. 4 is SnO prepared by the present invention2The Dynamic Adsorption degradation of formaldehyde figure that-QDs/Pt catalyst loadings are 10%
Fig. 5 is SnO prepared by the present invention2The Static Adsorption formaldehyde regeneration times that-QDs/Pt catalyst loadings are 10%
Figure.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, the technical solution in the present invention is carried out below
It clearly and completely describes, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
Embodiment 1: 3.85g SnI is weighed4It is added in 70 DEG C of water-bath, while the H of 10ml 2mg/ml is added2PtCl6
Solution (load capacity of pt is 2%), after stirring 6h, recycles sample, after the drying of sample lotion, weighs 1g SnO2- QDs/Pt is urged
Agent is dispersed in the 1L deionized water that pH value is 7.2, after ultrasonic 30min, uniformly sprays the 100g business in 80-200 mesh
On active carbon, sample is calcined into 3h at 300 DEG C.The sample is carried out to absorption degradation formaldehyde test in a dynamic state again, measures work
Property charcoal can extend 2.8 times using the time.
Embodiment 2: 3.85g SnI is weighed4It is added in 70 DEG C of water-bath, while the H of 10ml 2mg/ml is added2PtCl6
Solution (load capacity of pt is 2%), after stirring 6h, recycles sample, after the drying of sample lotion, weighs 1g SnO2- QDs/Pt is urged
Agent is dispersed in the 1L deionized water that pH value is 7.2, after ultrasonic 30min, uniformly sprays the 10g business in 80-200 mesh
On active carbon, sample is calcined into 3h at 300 DEG C.The sample is carried out to Dynamic Adsorption degradation of formaldehyde test under Metal halogen lamp again,
Measure active carbon can extend 3.2 times using the time.
Embodiment 3: 3.85g SnI is weighed4It is added in 70 DEG C of water-bath, while the H of 10ml 2mg/ml is added2PtCl6
Solution (load capacity of pt is 2%), after stirring 6h, recycles sample, after the drying of sample lotion, weighs 1g SnO2- QDs/Pt is urged
Agent is dispersed in the 1L deionized water that pH value is 8.4, after ultrasonic 30min, uniformly sprays the 10g business in 80-200 mesh
On active carbon, sample is calcined into 3h at 300 DEG C.The sample is carried out to Dynamic Adsorption degradation of formaldehyde test under Metal halogen lamp again,
Measure active carbon can extend 3.2 times using the time.
Embodiment 4: 3.85g SnI is weighed4It is added in 70 DEG C of water-bath, while the H of 10ml 2mg/ml is added2PtCl6
Solution (load capacity of pt is 2%), after stirring 6h, recycles sample, after the drying of sample lotion, weighs 1g SnO2- QDs/Pt is urged
Agent is dispersed in the 1L deionized water that pH value is 8.4, after ultrasonic 30min, uniformly sprays the 10g business in 80-200 mesh
On active carbon, sample is calcined into 3h at 300 DEG C.The sample is carried out to Dynamic Adsorption degradation of formaldehyde under 254nm ultraviolet lamp again
Test, measure active carbon can extend 3.1 times using the time.
Embodiment 5: 3.85g SnI is weighed4It is added in 70 DEG C of water-bath, while the H of 10ml 2mg/ml is added2PtCl6
Solution (load capacity of pt is 2%), after stirring 6h, recycles sample, after the drying of sample lotion, weighs 1g SnO2- QDs/Pt is urged
Agent is dispersed in the 1L deionized water that pH value is 8.4, after ultrasonic 30min, the 10g business of the 80-200 mesh uniformly sprayed
On active carbon, sample is calcined into 3h at 400 DEG C.The sample is carried out to Dynamic Adsorption degradation of formaldehyde test under Metal halogen lamp again,
Measure active carbon can extend 3.1 times using the time.
Embodiment 6: 3.85g SnI is weighed4It is added in 70 DEG C of water-bath, while the H of 10ml 2mg/ml is added2PtCl6
Solution (load capacity of pt is 2%), after stirring 6h, recycles sample, after the drying of sample lotion, weighs 1g SnO2- QDs/Pt is urged
Agent is dispersed in the 1L deionized water that pH value is 8.4, after ultrasonic 30min, the 10g business of the 80-200 mesh uniformly sprayed
On active carbon, sample is calcined into 3h at 400 DEG C.Again by the sample after absorption reaches saturation, the illumination 3h under Metal halogen lamp,
Measuring active static regeneration rate is 98.1%.
Embodiment 7: 3.85g SnI is weighed4It is added in 70 DEG C of water-bath, while the H of 10ml 2mg/ml is added2PtCl6
Solution (load capacity of pt is 2%), after stirring 6h, recycles sample, after the drying of sample lotion, weighs 1g SnO2- QDs/Pt is urged
Agent is dispersed in the 1L deionized water that pH value is 8.4, after ultrasonic 30min, the 10g business of the 80-200 mesh uniformly sprayed
On active carbon, sample is calcined into 3h at 400 DEG C.Again by the sample after absorption reaches saturation, the illumination under Metal halogen lamp
12h, measuring active static regeneration rate is 99.8%.
Embodiment 8: 3.85g SnI is weighed4It is added in 70 DEG C of water-bath, while the H of 25ml 2mg/ml is added2PtCl6
Solution (load capacity of pt is 5%), after stirring 6h, recycles sample, after the drying of sample lotion, weighs 1g SnO2- QDs/Pt is urged
Agent is dispersed in the 1L deionized water that pH value is 7.2, after ultrasonic 30min, uniformly sprays the 100g business in 80-200 mesh
On active carbon, sample is calcined into 3h at 300 DEG C.The sample is carried out to absorption degradation formaldehyde test in a dynamic state again, measures work
Property charcoal can extend 2.75 times using the time.
Embodiment 9: 3.85g SnI is weighed4It is added in 70 DEG C of water-bath, while the H of 35ml 2mg/ml is added2PtCl6
Solution (load capacity of pt is 7%), after stirring 6h, recycles sample, after the drying of sample lotion, weighs 1g SnO2- QDs/Pt is urged
Agent is dispersed in the 1L deionized water that pH value is 7.2, after ultrasonic 30min, uniformly sprays the 100g business in 80-200 mesh
On active carbon, sample is calcined into 3h at 300 DEG C.The sample is carried out to absorption degradation formaldehyde test in a dynamic state again, measures work
Property charcoal can extend 2.68 times using the time.
Embodiment 10: 3.85g SnI is weighed4It is added in 70 DEG C of water-bath, while the H of 10ml 2mg/ml is added2PtCl6
Solution (load capacity of pt is 2%), after stirring 6h, recycles sample, after the drying of sample lotion, weighs 1g SnO2- QDs/Pt is urged
Agent is dispersed in the 1L deionized water that pH value is 8.4, after ultrasonic 30min, the 10g business of the 80-200 mesh uniformly sprayed
On active carbon, sample is calcined into 3h at 500 DEG C.Again by the sample after absorption reaches saturation, the illumination under Metal halogen lamp
12h, measuring active static regeneration rate is 99.3%.
Sample is worn into the granularity of 320 mesh, about 40 microns, sample is then pressed into flake, is fixed on sample stage, into
The analysis test of row X-ray diffraction.When being scanned Electronic Speculum test, first in ethanol by a little sample dispersion, about 2mg or so surpasses
After sound is scattered, with suction pipe drop 2-3 drop on the objective table of Electronic Speculum, gold-plated processing is carried out after sample drying, is scanned
Electron microscope analysis.As shown in Figure 1, Figure 2, Figure 3 shows, X-ray diffraction analysis chart and scanning electron microscope (SEM) photograph show that activated carbon surface is born really
It is loaded with SnO2- QDs/Pt catalyst.As shown in figure 4, being tested by Dynamic Adsorption degradation of formaldehyde, catalyst prepared by the present invention can
Active carbon is extended 3 times or more using the time.As shown in figure 5, being tested by Static Adsorption formaldehyde, 3 photocatalysis are balanced again
Raw rate can reach 98% or more.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (4)
1. a kind of method of photocatalysis in-situ regeneration active carbon under visible light, which comprises the following steps:
1) by SnI4It is added in 70 DEG C of water-bath, while H is added2PtCl6Solution prepares SnO2- QDs/Pt photochemical catalyst, Pt's
Load capacity is 2%-7%；
2) SnO that will be prepared in step 1)2- QDs/Pt photochemical catalyst is dispersed in water phase, and the dispersion liquid that concentration is 1g/L is made；
3) by the SnO in step 2)2- QDs/Pt photocatalyst dispersion liquid is equably sprayed or is infiltrated on the activated carbon, SnO2-
The load capacity of QDs/Pt catalyst dispersion is 1%-20%；
4) sample generated in step 3) is calcined into 3h at 300-500 DEG C；
5) visible light illumination at room temperature by sample calcined in step 4), is carried out, active carbon in-situ is regenerated.
2. the method for photocatalysis in-situ regeneration active carbon under a kind of visible light as described in claim 1, which is characterized in that SnO2
Quantum dot size is 1-5nm.
3. the method for photocatalysis in-situ regeneration active carbon under a kind of visible light as described in claim 1, which is characterized in that step
5) in, the time of illumination is 3-12h.
4. the method for photocatalysis in-situ regeneration active carbon under a kind of visible light as described in claim 1, which is characterized in that described
SnO2The pH value of-QDs/Pt photocatalyst dispersion liquid is 7~8.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112023906A (en) * | 2020-05-08 | 2020-12-04 | 扬州工业职业技术学院 | Recycling process of waste activated carbon |
| CN115106072A (en) * | 2022-07-22 | 2022-09-27 | 中泰莱(江苏)环境有限公司 | Method for removing organic matters in activated carbon |
Citations (3)
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| CN102527336A (en) * | 2012-01-11 | 2012-07-04 | 南京师范大学 | Modified activated carbon and method for regenerating active carbon by photocatalysis of gas-solid fluidized bed |
| CN105776323A (en) * | 2016-02-26 | 2016-07-20 | 西南石油大学 | Method for preparing stannic oxide quantum dots with visible light responses |
| CN106732487A (en) * | 2016-12-22 | 2017-05-31 | 桂东县湘浙活性炭有限公司 | TiO2Photocatalytic activity carbon regeneration method |
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2018
- 2018-08-15 CN CN201810927510.1A patent/CN109012643A/en active Pending
Patent Citations (3)
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| CN102527336A (en) * | 2012-01-11 | 2012-07-04 | 南京师范大学 | Modified activated carbon and method for regenerating active carbon by photocatalysis of gas-solid fluidized bed |
| CN105776323A (en) * | 2016-02-26 | 2016-07-20 | 西南石油大学 | Method for preparing stannic oxide quantum dots with visible light responses |
| CN106732487A (en) * | 2016-12-22 | 2017-05-31 | 桂东县湘浙活性炭有限公司 | TiO2Photocatalytic activity carbon regeneration method |
Non-Patent Citations (2)
| Title |
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| YA-CHIN CHANG等: "Preparation of Pt@SnO2 Core-Shell Nanoparticles for Photocatalytic Degradation of Formaldehyde", 《J. CHIN. CHEM. SOC.》 * |
| 刘守新等: "木质活性炭的光催化再生 ", 《林产化学与工业》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112023906A (en) * | 2020-05-08 | 2020-12-04 | 扬州工业职业技术学院 | Recycling process of waste activated carbon |
| CN115106072A (en) * | 2022-07-22 | 2022-09-27 | 中泰莱(江苏)环境有限公司 | Method for removing organic matters in activated carbon |
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