CN111847498A - Cadmium sulfide nanorod and method for tribocatalytically degrading organic pollutants - Google Patents
Cadmium sulfide nanorod and method for tribocatalytically degrading organic pollutants Download PDFInfo
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- 239000002073 nanorod Substances 0.000 title claims abstract description 61
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000002957 persistent organic pollutant Substances 0.000 title claims abstract description 23
- 230000000593 degrading effect Effects 0.000 title claims abstract description 10
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- 238000006731 degradation reaction Methods 0.000 claims abstract description 27
- 230000003197 catalytic effect Effects 0.000 claims abstract description 16
- 238000003760 magnetic stirring Methods 0.000 claims abstract description 13
- 238000006555 catalytic reaction Methods 0.000 claims abstract description 12
- 239000013078 crystal Substances 0.000 claims abstract description 9
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- 238000006243 chemical reaction Methods 0.000 claims description 40
- 238000003756 stirring Methods 0.000 claims description 26
- 239000002243 precursor Substances 0.000 claims description 24
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- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G11/00—Compounds of cadmium
- C01G11/02—Sulfides
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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
- B01J27/02—Sulfur, selenium or tellurium; Compounds thereof
- B01J27/04—Sulfides
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- B82Y40/00—Manufacture or treatment of nanostructures
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/00—Treatment of water, waste water, or sewage
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- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Abstract
The invention particularly relates to a cadmium sulfide nanorod and a method for degrading organic pollutants through friction catalysis. The cadmium sulfide nanorod is of a hexagonal wurtzite crystal structure, belongs to a non-centrosymmetric point group, and has a specific diameter of 40-50nm and a length-diameter ratio of 8: 1-100: 1. the cadmium sulfide nanorod and the method for friction catalytic degradation of organic pollutants are simple to operate, mechanical energy in an environment can be effectively enriched by utilizing the piezoelectric property of cadmium sulfide with a specific structure, degradation of organic matters can be achieved only through magnetic stirring under a light-tight condition, the problem of low visible light response efficiency of a conventional photocatalysis experiment is solved, the requirement of equipment for generating sound waves by piezoelectric catalysis is avoided, the sewage degradation efficiency is greatly improved, the cost of sewage treatment is reduced, and the method is suitable for popularization and application.
Description
Technical Field
The invention relates to the technical field of catalytic degradation of sewage, in particular to cadmium sulfide nanorods and a method for friction catalytic degradation of organic pollutants.
Background
With the development of modern industry, the problem of environmental pollution seriously restricts the sustainable development of society. Especially, the soluble organic pollutants generated in the printing and dyeing industry have high toxicity and are not easy to decompose, so that the water source pollution problem is caused, bacteria and viruses can be transmitted, and the health of people is seriously harmed. Therefore, it has become a urgent necessity for researchers to develop a technique for removing these harmful dyes from wastewater.
The dye wastewater may be treated by conventional methods such as physical adsorption, coagulation sedimentation, electrocoagulation, etc. However, in these methods, the dye contaminants are not completely degraded, but are transferred from the liquid phase to the solid phase or another liquid phase, which inevitably results in secondary contamination. Some chemical processes, such as chlorination, introduce some harmful chemicals into our environment. Because the organic dye pollutants have high stability in the textile and printing and dyeing wastewater, the traditional organic dye wastewater treatment methods are difficult to obtain good effect in practical application.
In the face of these problems, the use of photocatalysts for the degradation of dye waste water has become an important means for the degradation of organic pollutants. However, the catalytic efficiency of the conventional semiconductor catalyst has not yet reached the practical standard sufficient for large-scale dye decomposition due to the rapid recombination of electron-hole generated by photoexcitation. In addition, the photocatalytic material has the defects of narrow wavelength response range, low light transmittance of dark dye wastewater, low solar energy utilization rate, easy weather influence and the like. Most of wastewater is discharged through pipelines and sealing grooves, and the light is difficult to see, so that a technical means for decomposing the wastewater under dark conditions needs to be found for realizing the wide application of the catalyst in industrial wastewater treatment.
In recent years, piezoelectric nanomaterials have shown great potential to capture mechanical energy from the surrounding environment and promote catalytic reactions. Under the action of certain external stress, the piezoelectric nano material can deform and generate electric charges. When the generated electric charge is used for pollutant decomposition and harmful bacteria elimination, the nano materials are called piezoelectric catalysts; it has also been found that pyroelectric nanomaterials can harvest energy from environments with fluctuating temperatures. The pyroelectric nano material can initiate redox reaction in aqueous solution under temperature fluctuation, which is similar to the redox reaction in photocatalysis, and the process is named as thermal catalysis. It is obvious that solar energy, mechanical energy and thermal energy can all be obtained by the functional material from the surroundings in some specific way. If the energy which is usually neglected can be effectively utilized, energy conservation, emission reduction and pollutant degradation can be realized at the same time.
The invention with application number 201610357058.0 discloses a one-dimensional cadmium sulfide nanorod catalyst, a preparation method thereof and application thereof in hydrogen production by water splitting under ultrasonic catalysis, and the two low-density energies of sound energy and light energy are converted into high-density hydrogen energy by utilizing the piezoelectric and photocatalytic properties of the material, so that the full decomposition of water is realized. However, the input source in the method applies noise waves not lower than 3000Hz in addition to ultrasonic waves, and the long-term continuous ultrasonic waves and high-frequency noise energy undoubtedly cause harm to human beings, wild animals and the surrounding environment.
Based on the problems, the invention provides a cadmium sulfide nanorod and a method for friction catalytic degradation of organic pollutants, in order to realize efficient treatment of industrial wastewater and avoid the defects of other methods.
Disclosure of Invention
The invention provides a cadmium sulfide nanorod and a method for degrading organic pollutants through friction catalysis in order to make up for the defects of the prior art.
The invention is realized by the following technical scheme:
a cadmium sulfide nanorod is characterized in that: the structure is a hexagonal wurtzite crystal structure, belongs to a non-centrosymmetric point group, and has a specific diameter of 40-50nm, a length-diameter ratio of 8: 1-100: 1.
preferably, the length-diameter ratio of the cadmium sulfide nanorod is 40: 1-80: 1.
the preparation method of the cadmium sulfide nanorod is characterized by comprising the following steps of:
dispersing chromium nitrate tetrahydrate and thiourea in 0.86mol/L ethylenediamine solution, uniformly stirring, transferring to a reaction kettle, carrying out heat preservation reaction at 135-178 ℃ for 15-75h, washing and drying the obtained product to obtain a hybrid precursor;
and secondly, dispersing the hybrid precursor in deionized water, performing ultrasonic dispersion, stirring and refluxing for 12 hours at 80 ℃, completely removing organic matters in the hybrid precursor, washing the obtained product with deionized water and absolute ethyl alcohol in sequence, and drying to obtain the cadmium sulfide nanorod.
Preferably, in the first step, the ratio of chromium nitrate tetrahydrate to thiourea is 1: 3 dispersing in the ethylenediamine solution, and stirring for 30min at normal temperature to uniformly mix; placing the mixture in a reaction kettle, keeping the temperature at 160 ℃ for reaction for 60 hours, washing the product obtained by the reaction with deionized water and absolute ethyl alcohol in sequence, and drying to obtain the hybrid precursor.
The method for degrading organic pollutants by using the friction catalysis of the cadmium sulfide nano-rods is characterized by comprising the following steps: mixing cadmium sulfide nanorods with an organic matter polluted solution in a reaction vessel, and continuously magnetically stirring for 7-14 hours under a dark condition; by utilizing the piezoelectric and semiconductor characteristics of the cadmium sulfide nanorod, the friction mechanical energy generated by mutual contact between the magnetic stirrer and the inner wall of the reaction vessel is converted into chemical energy, so that the degradation of organic pollutants is realized.
The catalytic efficiency can be effectively improved by increasing the friction force between the magnetic stirring bar and the inner wall of the reaction vessel or increasing the contact area of the interface. Therefore, the larger the stirring speed, the larger the number of magnetic stirrers and the larger the surface area, the rougher the inner wall of the reaction vessel, and the more favorable the improvement of the catalytic efficiency.
Preferably, a polytetrafluoroethylene stirrer is adopted, the magnetic stirring speed is 300r/min, and the stirring time is 7 hours.
The invention has the beneficial effects that: the cadmium sulfide nanorod and the method for degrading organic pollutants through friction catalysis are simple to operate, mechanical energy in an environment can be effectively enriched by utilizing the piezoelectric property of cadmium sulfide with a specific structure, degradation of organic matters can be realized only through magnetic stirring under a light-tight condition, the problem of low visible light response efficiency of a conventional photocatalysis experiment is solved, the equipment requirement that sound waves need to be generated through piezoelectric catalysis is avoided, the sewage degradation efficiency is greatly improved, the sewage degradation cost is reduced, and the method is suitable for popularization and application.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of X-ray diffraction of cadmium sulfide nanorods with specific aspect ratios synthesized by the present invention;
FIG. 2 is a schematic diagram of a Scanning Electron Micrograph (SEM) and a projection electron micrograph (TEM) of the synthesized cadmium sulfide nanorod with a specific aspect ratio;
FIG. 3 is a schematic diagram showing the concentration change of a representative organic pollutant rhodamine (RhB) after the cadmium sulfide nanorods and the organic pollutant solution are continuously magnetically stirred for 0-7 h in a reaction vessel;
FIG. 4 is a schematic diagram showing the comparison of the efficiency of the present invention for the frictional catalytic degradation of organic pollutants by cadmium sulfide nanorods under stirring with different numbers of magnetons.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the embodiment of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The cadmium sulfide nanorod is of a hexagonal wurtzite crystal structure, belongs to a non-centrosymmetric point group, and has a specific diameter of 40-50nm and a length-diameter ratio of 8: 1-100: 1.
preferably, the length-diameter ratio of the cadmium sulfide nanorod is 40: 1-80: 1.
the preparation method of the cadmium sulfide nanorod comprises the following steps:
dispersing chromium nitrate tetrahydrate and thiourea in 0.86mol/L ethylenediamine solution, uniformly stirring, transferring to a reaction kettle, carrying out heat preservation reaction at 135-178 ℃ for 15-75h, washing and drying the obtained product to obtain a hybrid precursor;
and secondly, dispersing the hybrid precursor in deionized water, performing ultrasonic dispersion, stirring and refluxing for 12 hours at 80 ℃, completely removing organic matters in the hybrid precursor, washing the obtained product with deionized water and absolute ethyl alcohol in sequence, and drying to obtain the cadmium sulfide nanorod.
Preferably, in the first step, the ratio of chromium nitrate tetrahydrate to thiourea is 1: 3 dispersing in the ethylenediamine solution, and stirring for 30min at normal temperature to uniformly mix; keeping the temperature of 160 ℃ in the reaction kettle for reaction for 60 hours, washing the product obtained by the reaction with deionized water and absolute ethyl alcohol in sequence, and drying to obtain the hybrid precursor.
The method for degrading organic pollutants by using the cadmium sulfide nanorods through friction catalysis comprises the steps of mixing the cadmium sulfide nanorods with an organic pollutant solution in a reaction vessel, and continuously stirring for 7-14 hours by magnetic force under the condition of keeping out of the sun; by utilizing the piezoelectric and semiconductor characteristics of the cadmium sulfide nanorod, the friction mechanical energy generated by mutual contact between the magnetic stirrer and the inner wall of the reaction vessel is converted into chemical energy, so that the degradation of organic pollutants is realized.
The catalytic efficiency can be effectively improved by increasing the friction force between the magnetic stirring bar and the inner wall of the reaction vessel or increasing the contact area of the interface. Therefore, the larger the stirring speed, the larger the number of magnetic stirrers and the larger the surface area, the rougher the inner wall of the reaction vessel, and the more favorable the improvement of the catalytic efficiency.
Preferably, four polytetrafluoroethylene stirrers are adopted, the magnetic stirring speed is 300r/min, and the stirring time is 7 hours.
Example 1
(1) Synthesis of CdS nanorod precursor
Weighing 6.46mmol of chromium nitrate tetrahydrate and 19.38mmol of thiourea, dispersing in an ethylenediamine solution with the concentration of 0.86mol/L, and stirring for 30min at normal temperature to uniformly mix; and then transferring the mixture to a reaction kettle, covering and sealing the reaction kettle, putting the reaction kettle into a stainless steel sleeve for locking, heating the reaction kettle to 160 ℃, preserving the temperature for 60 hours, washing the obtained yellow powder with deionized water and absolute ethyl alcohol respectively, and drying the yellow powder to obtain the hybrid precursor.
(2) Synthesis of CdS nanorod
And (2) dispersing 40mg of the obtained hybrid precursor in 150ml of deionized water, performing ultrasonic dispersion, stirring and refluxing for 12h at 80 ℃, completely removing organic matters in the hybrid precursor, washing the obtained product for 3 times by using the deionized water and absolute ethyl alcohol respectively, and transferring the product to a vacuum drying oven at 60 ℃ for drying for 12h to obtain the cadmium sulfide nanorod as CdS-NR.
(3) Structural characterization
The synthesized CdS-NR is scanned by an X-ray diffractometer, and the result is shown in figure 1. It can be confirmed from FIG. 1 that it is a hexagonal wurtzite-type CdS crystal.
The synthesized CdS-NR can be observed by a scanning electron microscope and a transmission electron microscope, and the result is shown in figure 2. As shown in the attached figure 2, the CdS is a one-dimensional nanorod with the diameter of 40-50nm and the length-diameter ratio of 40: 1-80: 1.
(4) in this example, rhodamine (RhB) was selected as a representative of typical organic pollutants, and a degradation experiment of cadmium sulfide nanorods on organic matters was performed:
30mg of cadmium sulfide nanorods are added into 30mL of RhB solution with the concentration of 5mg/L, and the magnetic stirring is continuously carried out for 7 hours or 14 hours in a glass cup or a polypropylene (PP) cup in a dark condition.
The magnetic stirring speed is 300r/min, polytetrafluoroethylene stirrers (diameter 8mm, length 25mm) with uniform specification and size are adopted, and the quantity of the stirrers is 1, 2 or 4 (for comparing experimental effects).
The application experiment comprises the following steps:
the method comprises the following steps: 30mg CdS-NR were placed in a glass cup and a PP cup each having a volume of 100mL, 30mL of RhB solution (concentration: 5mg/L) was added, and a blank group (stirred without adding a catalyst) was set as a control. One magneton (diameter 8mm, length 25mm) each, rotate at 300r/min, and continue magnetic stirring for 14 h.
Step two: 1mL of the reaction mixture was collected at 1-hour intervals, centrifuged, and filtered through a 0.22-. mu.m organic filter. After the filtration, the concentration of RhB is calibrated by a near infrared-ultraviolet-visible spectrophotometer, and the experimental result is shown in figure 3.
As shown in the attached figure 3, in a sewage degradation experiment, in the process of continuously magnetically stirring cadmium sulfide nanorods and organic matter polluted solution in a reaction vessel for 0-7 hours, the RhB concentration is rapidly reduced and approaches to 0; after 7h of continuous stirring, the RhB concentration drop was no longer significant, and thus 7h of continuous magnetic stirring was considered to be the optimal choice.
Detection shows that the degradation rate of RhB after the blank group without any catalyst is stirred for 14 hours is 3%, the degradation rate after the CdS-NR catalyst is added and stirred in a PP cup for 7 hours is 98%, and the dye degradation efficiency is higher than that of 72% in a glass cup.
Different numbers of magnetons are placed in a glass cup and a PP cup to carry out a reaction of degrading RhB organic dye by using a one-dimensional CdS nanorod catalyst, and an experiment comprises the following steps:
the method comprises the following steps: 30mg CdS-NR are respectively placed in a glass cup and a PP cup with the volume of 100mL, 30mL RhB solution (the concentration is 5mg/L) is added, wherein the number of the magnetons in the 3 PP cups is respectively one, two and four (the diameter is 8mm, the length is 25mm), the number of the magnetons in the glass cup is 4, the rotating speed is 300r/min, and the magnetic stirring is continuously carried out for 7 hours.
Step two: 1mL of the reaction mixture was collected at 1-hour intervals, centrifuged, and filtered through a 0.22-. mu.m organic filter. And (4) calibrating the concentration of RhB by using a near infrared-ultraviolet-visible spectrophotometer after the filter membrane is filtered.
The results of the sewage degradation rate are shown in figure 4, the catalytic efficiency is 56% for one stirrer, 77% for two magnetons, and 98% for RhB when there are four magnetons.
As shown in the attached figure 4, in the sewage degradation experiment, the degradation rate of the organic matter polluted solution is obviously increased along with the increase of the number of the magnetons. The reason is that as the number of the magnetons increases, the contact area and the friction force between the container and the stirrer increase, and more friction energy generated can be absorbed by the cadmium sulfide nanorods, thereby being beneficial to the improvement of the catalytic efficiency. It is considered that the catalytic efficiency can be remarkably improved by increasing the friction force or the contact with the catalyst, and higher catalytic degradation efficiency can be obtained by increasing the number of the polytetrafluoroethylene stirrers.
In addition, as can be seen from fig. 4, the degradation rate of the sewage in the PP cup is obviously higher than that of the glass cup under the same number of magnetons. This is because the inner wall of the glass is smooth, which is not favorable for the generation of friction. In contrast, the PP cup is rougher than the glass cup, which is beneficial to the generation of more friction energy, so that the cadmium sulfide nanorod can enrich more mechanical energy in the environment to degrade the organic matter polluted solution. Thus, it is considered that a reaction vessel having a rough inner wall is the most preferable choice.
Example 2
(1) Synthesis of CdS nanorod precursor
Weighing 5.81mmol of chromium nitrate tetrahydrate and 17.43mmol of thiourea, dispersing in an ethylenediamine solution with the concentration of 0.86mol/L, and stirring for 30min at normal temperature to uniformly mix; and then transferring the mixture to a reaction kettle, covering and sealing the reaction kettle, putting the reaction kettle into a stainless steel sleeve for locking, heating the mixture to 135 ℃, preserving the heat for 15 hours, washing the obtained yellow powder by deionized water and absolute ethyl alcohol respectively, and drying the yellow powder to obtain the hybrid precursor.
(2) Synthesis of CdS nanorod
And (2) dispersing 40mg of the obtained hybrid precursor in 150ml of deionized water, performing ultrasonic dispersion, stirring and refluxing for 12h at 80 ℃, completely removing organic matters in the hybrid precursor, washing the obtained product for 4 times by using the deionized water and absolute ethyl alcohol respectively, and transferring the product to a vacuum drying oven at 60 ℃ for drying for 10h to obtain the cadmium sulfide nanorod as CdS-NR.
(3) Structural characterization
Scanning the synthesized CdS-NR by an X-ray diffractometer to determine that the CdS-NR is hexagonal wurtzite CdS crystal.
The synthesized CdS-NR is observed by a scanning electron microscope and a transmission electron microscope, and the CdS is a one-dimensional nanorod with the diameter of 40-50nm and the length-diameter ratio of 8: 1-50: 1.
example 3
(1) Synthesis of CdS nanorod precursor
Weighing 7.12mmol of chromium nitrate tetrahydrate and 21.36mmol of thiourea, dispersing in an ethylenediamine solution with the concentration of 0.86mol/L, and stirring for 30min at normal temperature to uniformly mix; and then transferring the mixture to a reaction kettle, covering and sealing the reaction kettle, putting the reaction kettle into a stainless steel sleeve for locking, heating the mixture to 178 ℃, preserving the heat for 75 hours, washing the obtained yellow powder with deionized water and absolute ethyl alcohol respectively, and drying the yellow powder to obtain the hybrid precursor.
(2) Synthesis of CdS nanorod
And (2) dispersing 40mg of the obtained hybrid precursor in 150mL of deionized water, performing ultrasonic dispersion, stirring and refluxing for 12h at 80 ℃, completely removing organic matters in the hybrid precursor, washing the obtained product for 4 times by using the deionized water and absolute ethyl alcohol respectively, and transferring the product to a vacuum drying oven at 60 ℃ for drying for 10h to obtain the cadmium sulfide nanorod as CdS-NR.
(3) Structural characterization
Scanning the synthesized CdS-NR by an X-ray diffractometer to determine that the CdS-NR is hexagonal wurtzite CdS crystal.
Observing the synthesized CdS-NR by using a scanning electron microscope and a transmission electron microscope, wherein the CdS is a one-dimensional nanorod, the diameter of the nanorod is 40-50nm, and the length-diameter ratio of the nanorod is 40: 1-100: 1.
compared with the prior art, the cadmium sulfide nanorod and the method for degrading organic pollutants by friction catalysis have the following characteristics:
first, the crystal structure of the cadmium sulfide nanorod catalyst is of a non-centrosymmetric hexagonal wurtzite type, accords with the structural characteristics of a piezoelectric crystal, and has piezoelectricity.
Secondly, compared with other shapes, the one-dimensional nano rod-shaped CdS catalyst can generate a piezoelectric effect more easily in the eddy of water, so that the one-dimensional nano rod-shaped CdS catalyst is more beneficial to the collection and conversion of friction mechanical energy, and the length-diameter ratio is 40: 1-80: the cadmium sulfide nanorod sample of 1 has a good catalytic effect.
Thirdly, the obtained one-dimensional CdS nanorod can degrade organic dye only by magnetic stirring under the condition of keeping out of the sun, almost completely degrade the RhB solution within 7h, overcome the defect of low visible light response efficiency of conventional photocatalytic experiments, and simultaneously reduce the requirement on equipment for generating sound waves.
Fourthly, the limitation that cadmium sulfide is used as a traditional photocatalyst is broken through, the piezoelectric property of the cadmium sulfide with a specific structure is exerted, the cadmium sulfide can effectively enrich mechanical energy in the environment, and a new way is provided for further enhancing the efficiency of photocatalytic degradation of organic dyes.
Claims (6)
1. A cadmium sulfide nanorod is characterized in that: the structure is a hexagonal wurtzite crystal structure, belongs to a non-centrosymmetric point group, and has a specific diameter of 40-50nm, a length-diameter ratio of 8: 1-100: 1.
2. the cadmium sulfide nanorod according to claim 1, wherein: more preferably, the aspect ratio is 40: 1-80: 1.
3. the preparation method of the cadmium sulfide nanorod is characterized by comprising the following steps of:
dispersing chromium nitrate tetrahydrate and thiourea in 0.86mol/L ethylenediamine solution, uniformly stirring, transferring to a reaction kettle, carrying out heat preservation reaction at 135-178 ℃ for 15-75h, washing and drying the obtained product to obtain a hybrid precursor;
and secondly, dispersing the hybrid precursor in deionized water, performing ultrasonic dispersion, stirring and refluxing for 12 hours at 80 ℃, completely removing organic matters in the hybrid precursor, washing the obtained product with deionized water and absolute ethyl alcohol in sequence, and drying to obtain the cadmium sulfide nanorod.
4. The method for preparing cadmium sulfide nanorods according to claim 3, characterized in that: preferably, in the first step, the ratio of chromium nitrate tetrahydrate to thiourea is 1: 3 dispersing in the ethylenediamine solution, and stirring for 30min at normal temperature to uniformly mix; keeping the temperature of 160 ℃ in the reaction kettle for reaction for 60 hours, washing the product obtained by the reaction with deionized water and absolute ethyl alcohol in sequence, and drying to obtain the hybrid precursor.
5. A method for degrading organic pollutants by utilizing cadmium sulfide nanorod friction catalysis is characterized by comprising the following steps: mixing cadmium sulfide nanorods with an organic matter polluted solution in a reaction vessel, and continuously magnetically stirring for 7-14 hours under a dark condition; by utilizing the piezoelectric and semiconductor characteristics of the cadmium sulfide nanorod, the friction mechanical energy generated by mutual contact between the magnetic stirrer and the inner wall of the reaction vessel is converted into chemical energy, so that the degradation of organic pollutants is realized.
6. The method for the frictional catalytic degradation of organic pollutants by using cadmium sulfide nanorods according to claim 5, characterized in that: preferably, a polytetrafluoroethylene stirrer is adopted, the magnetic stirring speed is 300r/min, and the stirring time is 7 hours.
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