Preparation method and application of retired photovoltaic derived SiC loaded CuO composite adsorption material

Abstract

This invention belongs to the field of adsorption material technology, specifically relating to the preparation method and application of CuO-supported SiC composite adsorbent material derived from decommissioned photovoltaic wafers. By providing SiC from waste photovoltaic silicon wafers, environmental pollution is reduced. Furthermore, CuO is loaded onto the surface of decommissioned photovoltaic-derived nano-SiC through a mechanical ball milling-calcination process, utilizing the generated oxygen vacancies to provide additional adsorption active sites. This enables the composite adsorbent material to exhibit good adsorption and removal rates of antibiotics in water under light-free conditions.

Description

Technical Field

[0001] This invention belongs to the field of adsorption material technology, specifically relating to the preparation method and application of SiC-supported CuO composite adsorption materials derived from decommissioned photovoltaic systems. Background Technology

[0002] Cefaclor (CEC), a common antibiotic, has led to environmental pollution problems due to its widespread use. Large amounts of incompletely metabolized cefaclor enter the environment through wastewater discharge and other pathways, remaining in water bodies and disrupting the surrounding ecological balance. Cefaclor in water inhibits the normal growth and reproduction of aquatic microorganisms, disrupting the bottom layer of the food chain. Furthermore, over time, these residual cefaclor residues may induce antibiotic resistance in bacteria in the environment, not only polluting the natural environment but also further threatening the health of humans and other organisms. Researchers have used various water treatment technologies, such as photocatalytic degradation, membrane separation, electrochemical oxidation, and electrocatalysis and Fenton / Fenton-like oxidation technologies, to treat cefaclor in water. However, these technologies all have limitations such as high energy consumption and complex operation.

[0003] Against the backdrop of global climate change and energy transition, a large number of photovoltaic panels are facing retirement. To reduce the environmental pollution caused by discarded photovoltaic panels, their resource utilization is urgently needed. Existing technologies include research on using discarded photovoltaic panels to prepare functional materials. For example, patent CN114377707A discloses a method for preparing SiC / TiO2-based photocatalysts using discarded solar photovoltaic panels. This method converts retired photovoltaic silicon wafers into nanoscale SiC via carbothermal reduction and further loads TiO2, which is used to degrade tetracycline pollutants in water under visible light irradiation. This technical route achieves high-value utilization of retired photovoltaic silicon wafers and has positive environmental significance.

[0004] However, silicon carbide prepared from waste photovoltaic panels still has limitations in adsorption performance. This is mainly because cefaclor, as a β-lactam antibiotic, contains polar groups such as amide and carboxyl groups in its molecular structure, limiting the adsorption capacity of silicon carbide for this pollutant and resulting in low adsorption efficiency. Therefore, there is an urgent need to develop a composite adsorption material to overcome the shortcomings of SiC and improve its adsorption performance, thereby increasing the removal efficiency of antibiotics during the adsorption process. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a method for preparing SiC-supported CuO composite adsorbent materials derived from decommissioned photovoltaic systems and their applications.

[0006] The technical solution of the present invention is as follows: This invention provides a method for preparing a SiC-supported CuO composite adsorbent material derived from decommissioned photovoltaic systems, comprising: (1) After mixing waste photovoltaic silicon, iron oxide and activated carbon, the mixture is ball-milled to obtain a first mixture; (2) In an argon atmosphere, the first mixture is calcined at 1300-1500℃ to obtain the calcined product; (3) The calcined product was calcined at 500-800℃ in an air atmosphere to obtain regenerated nano-SiC; (4) After mixing the regenerated nano-SiC with CuO, a second ball milling is performed to obtain a second mixture; (5) The second mixture is calcined to obtain CuO / SiC composite adsorbent material.

[0007] Based on the above-described method for preparing SiC-supported CuO composite adsorbent material derived from decommissioned photovoltaics, in step (4), the rotation speed of the second ball mill is 400-700 r / min, and the time is 6-8 h.

[0008] Based on the above-described method for preparing SiC-supported CuO composite adsorbent materials derived from decommissioned photovoltaics, in step (5), the calcination temperature is 500-800℃ and the time is 2-4h.

[0009] Based on the above-described method for preparing decommissioned photovoltaic-derived SiC-supported CuO composite adsorbent materials, in step (4), regenerated nano-SiC and CuO are mixed at a mass ratio of 1:0.25-0.333.

[0010] Based on the above-described method for preparing CuO composite adsorbent material derived from decommissioned photovoltaic cells using SiC, CuO particles are loaded onto the surface of regenerated nano-SiC to form a layered porous structure.

[0011] Based on the above-described method for preparing SiC-supported CuO composite adsorbent material derived from decommissioned photovoltaics, in step (1), the rotation speed of the first ball mill is 500-700 r / min, and the time is 6-8 h.

[0012] Based on the preparation method of the retired photovoltaic-derived SiC-supported CuO composite adsorbent material described above, in step (2), the calcination time is 4-6 h.

[0013] Based on the preparation method of the retired photovoltaic-derived SiC-supported CuO composite adsorbent material described above, in step (3), the calcination time is 4-6 h.

[0014] The present invention also provides a method for preparing the decommissioned photovoltaic-derived SiC-supported CuO composite adsorbent material, and the application of the CuO / SiC composite adsorbent material prepared by the method described above in the removal of antibiotics from water.

[0015] Furthermore, the antibiotics include cefaclor, tetracycline, and sulfamethoxazole.

[0016] Beneficial effects This invention loads CuO onto the surface of decommissioned photovoltaic-derived nano-SiC using a mechanical ball milling-calcination process, utilizing the generated oxygen vacancies to provide additional adsorption active sites, enabling the composite adsorbent material to exhibit good adsorption and removal rates of antibiotics in water under light-free conditions.

[0017] This invention provides SiC from waste photovoltaic silicon wafers, which not only reduces environmental pollution but also gives silicon carbide higher value when used as an adsorbent to treat cefaclor. Extensive experiments have shown that when the mass ratio of regenerated nano-SiC to CuO is 1:0.25-0.333, the resulting composite adsorbent material achieves a dark adsorption removal rate of over 98.7% for cefaclor. Attached Figure Description

[0018] Figure 1 This is a schematic flowchart of a method for preparing a SiC-supported CuO composite adsorbent material derived from decommissioned photovoltaic cells according to the present invention.

[0019] Figure 2 The images shown are scanning electron microscope images of the 25% CuO / SiC composite adsorbent material obtained in Example 4, where (a) represents the low-magnification morphology and (b) represents the high-magnification morphology.

[0020] Figure 3 The graph shows a comparison of the adsorption rates of cefaclor on the CuO / SiC composite adsorbent materials obtained in Examples 1-7.

[0021] Figure 4 This is a comparison chart of the adsorption rates of different pollutants for the 25% CuO / SiC composite adsorbent material obtained in Example 4. Detailed Implementation

[0022] The following examples are intended to illustrate the present invention, and not to further limit the invention.

[0023] This invention provides a method for preparing a SiC-supported CuO composite adsorbent material derived from decommissioned photovoltaic systems, comprising: (1) After mixing waste photovoltaic silicon, iron oxide and activated carbon, the mixture is ball-milled to obtain a first mixture.

[0024] In order to realize the resource utilization of high-purity silicon wafers in retired photovoltaic panels, this invention uses waste photovoltaic silicon as silicon source, activated carbon as carbon source, and iron oxide as catalyst to carry out carbothermic reduction reaction to prepare regenerated nano-SiC.

[0025] To ensure SiC yield while avoiding the introduction of excessive impurities, waste photovoltaic silicon, iron oxide, and activated carbon were mixed in a mass ratio of 3:0.148:1.92.

[0026] Furthermore, to ensure thorough mixing and refinement of the silicon powder, carbon source, and catalyst, and to generate a mechanochemical activation effect, thereby improving reaction uniformity, preferably, the first ball milling speed is 500-700 r / min, and the time is 6-8 h. More preferably, the ball milling speed is 500 r / min, and the reaction time is 6 h.

[0027] (2) In an argon atmosphere, the first mixture is calcined at 1300-1500℃ to obtain the calcined product.

[0028] To prevent silicon and carbon from being oxidized at high temperatures and to ensure the smooth progress of the carbothermic reduction reaction, the preferred calcination time is 4-6 hours, and more preferably, calcination at 1500°C for 4 hours, so as to effectively control the SiC grain size and avoid overgrowth.

[0029] (3) The calcined product is calcined at 500-800℃ in an air atmosphere to obtain regenerated nano-SiC.

[0030] Among them, the regenerated nano-SiC has a particle size of 50-200nm.

[0031] To improve the purity of the SiC product, a calcination time of 4-6 hours is preferred. More preferably, the reaction temperature is 500°C and the reaction time is 5 hours.

[0032] This invention involves preparing silicon carbide from waste photovoltaic silicon wafers via carbothermal reduction and then removing impurities through a one-step calcination process. This avoids interference from impurities during the subsequent loading of SiC with CuO and the adsorption treatment of antibiotics.

[0033] Furthermore, regenerated nano-SiC has better surface modifiability, which is beneficial for the effective loading and interfacial bonding of CuO, thereby improving structural stability.

[0034] (4) After mixing the regenerated nano-SiC with CuO, a second ball milling is performed to obtain a second mixture.

[0035] In this process, regenerated nano-SiC and CuO are mixed at a mass ratio of 1:0.25-0.333.

[0036] Compared to complex processes such as sol-gel and hydrothermal methods, ball milling is simple to operate, solvent-free, easy to scale up, and allows CuO particles to be uniformly attached to the SiC surface through mechanical force.

[0037] Preferably, the second ball milling speed is 400-700 r / min and the time is 6-8 h to ensure that CuO is uniformly dispersed on the surface of regenerated nano-SiC and forms a tight bond.

[0038] More preferably, the ball milling speed is 400 r / min and the reaction time is 8 h.

[0039] (5) The second mixture is calcined to obtain CuO / SiC composite adsorbent material.

[0040] To promote the bonding between CuO and SiC and enhance load stability, the calcination treatment temperature is preferably 500-800℃ and the time is 2-4h.

[0041] More preferably, the calcination temperature is 500℃ and the reaction time is 3h.

[0042] Regarding the morphology, in the CuO / SiC composite adsorbent material, CuO particles are loaded on the surface of regenerated nano-SiC to form a layered porous structure, which is beneficial to the subsequent improvement of dark adsorption performance.

[0043] The present invention also provides a method for preparing the CuO / SiC composite adsorbent material derived from decommissioned photovoltaic cells, and the application of the CuO / SiC composite adsorbent material prepared by the method described above in the removal of antibiotics from water. Further, the antibiotics include cefaclor, tetracycline, and sulfamethoxazole.

[0044] The removal process is carried out under light-free conditions, which improves the removal rate of antibiotics in water, especially the dark adsorption removal rate of cefaclor, with a removal rate of not less than 98%.

[0045] This invention loads CuO onto the surface of decommissioned photovoltaic-derived nano-SiC using a mechanical ball milling-calcination process. The oxygen vacancies on the CuO surface provide additional adsorption active sites, thereby improving the adsorption and removal rate of cefaclor by the composite adsorbent material under light-free conditions compared to SiC alone.

[0046] Furthermore, this invention provides SiC from waste photovoltaic silicon wafers, which not only reduces environmental pollution but also gives silicon carbide higher value by treating cefaclor as an adsorbent.

[0047] Unless otherwise specified, all raw materials and reagents used in the following examples were commercially available.

[0048] Example 1 This embodiment provides a method for preparing a SiC-supported CuO composite adsorbent material derived from decommissioned photovoltaic cells, including the following steps: (1) After mixing waste photovoltaic silicon, iron oxide and activated carbon in a ratio of 3:0.148:1.92, the mixture was transferred to a ball mill jar and ball milled at 500 r / min for 6 h.

[0049] (2) The powder from step (1) is transferred to a tube furnace and calcined at 1500°C under an argon atmosphere for 4 hours to obtain gray-black powdered nano-SiC.

[0050] (3) Transfer the SiC from step (2) to a muffle furnace and keep it at 500°C for 4 hours to perform calcination and decarburization to obtain regenerated nano SiC.

[0051] (4) Take 1g of SiC obtained in step (3), add 0.111g of CuO, transfer it to a ball mill jar, and ball mill at 400r / min for 8h to fully load CuO.

[0052] (5) Transfer the powder obtained in step (4) to a muffle furnace and calcine it at 500°C for 3 hours to obtain 10% CuO / SiC composite adsorbent material.

[0053] Example 2 This embodiment provides a method for preparing a SiC-supported CuO composite adsorbent material derived from decommissioned photovoltaic cells, including the following steps: (1) After mixing waste photovoltaic silicon, iron oxide and activated carbon in a ratio of 3:0.148:1.92, the mixture was transferred to a ball mill jar and ball milled at 500 r / min for 6 h.

[0054] (2) The powder from step (1) is transferred to a tube furnace and calcined at 1500°C under an argon atmosphere for 4 hours to obtain gray-black powdered nano-SiC.

[0055] (3) Transfer the SiC from step (2) to a muffle furnace and keep it at 500°C for 4 hours to perform calcination and decarburization to obtain regenerated nano SiC.

[0056] (4) Take 1g of SiC obtained in step (3), add 0.177g of CuO, transfer to a ball mill jar, and ball mill at 400r / min for 8h to fully load CuO.

[0057] (5) The powder obtained in step (4) is transferred to a muffle furnace and calcined at 500°C for 3 hours to obtain 15% CuO / SiC composite adsorbent material.

[0058] Example 3 This embodiment provides a method for preparing a SiC-supported CuO composite adsorbent material derived from decommissioned photovoltaic cells, including the following steps: (1) After mixing waste photovoltaic silicon, iron oxide and activated carbon in a ratio of 3:0.148:1.92, the mixture was transferred to a ball mill jar and ball milled at 500 r / min for 6 h.

[0059] (2) The powder from step (1) is transferred to a tube furnace and calcined at 1500°C under an argon atmosphere for 4 hours to obtain gray-black powdered nano-SiC.

[0060] (3) Transfer the SiC from step (2) to a muffle furnace and keep it at 500°C for 4 hours to perform calcination and decarburization to obtain regenerated nano SiC.

[0061] (4) Take 1g of SiC obtained in step (3), add 0.250g of CuO, transfer it to a ball mill jar, and ball mill at 400r / min for 8h to fully load CuO.

[0062] (5) Transfer the powder obtained in step (4) to a muffle furnace and calcine it at 500°C for 3 hours to obtain 20% CuO / SiC composite adsorbent material.

[0063] Example 4 This embodiment provides a method for preparing a SiC-supported CuO composite adsorbent material derived from decommissioned photovoltaic cells, including the following steps: (1) After mixing waste photovoltaic silicon, iron oxide and activated carbon in a ratio of 3:0.148:1.92, the mixture was transferred to a ball mill jar and ball milled at 500 r / min for 6 h.

[0064] (2) The powder from step (1) is transferred to a tube furnace and calcined at 1500°C under an argon atmosphere for 4 hours to obtain gray-black powdered nano-SiC.

[0065] (3) Transfer the SiC from step (2) to a muffle furnace and keep it at 500°C for 4 hours to perform calcination and decarburization to obtain regenerated nano SiC.

[0066] (4) Take 1g of SiC obtained in step (3), add 0.333g of CuO, transfer it to a ball mill jar, and ball mill at 400r / min for 8h to fully load CuO.

[0067] (5) The powder obtained in step (4) is transferred to a muffle furnace and calcined at 500°C for 3 hours to obtain 25% CuO / SiC composite adsorbent material.

[0068] The 25% CuO / SiC composite adsorbent material obtained in Example 4 was characterized and observed using a cold field emission scanning electron microscope (FE-SEM, Sirion 200, Philips). The results are as follows: Figure 2 As shown. From Figure 2 As can be seen in (a), a large number of CuO particles are tightly adhered to the surface of the SiC support, resulting in a rough surface. Meanwhile, from... Figure 2In (b), it was also observed that the CuO / SiC surface exhibited a layered structure with obvious wrinkles and pores in some areas.

[0069] Example 5 This embodiment provides a method for preparing a SiC-supported CuO composite adsorbent material derived from decommissioned photovoltaic cells, including the following steps: (1) After mixing waste photovoltaic silicon, iron oxide and activated carbon in a ratio of 3:0.148:1.92, the mixture was transferred to a ball mill jar and ball milled at 500 r / min for 6 h.

[0070] (2) The powder from step (1) is transferred to a tube furnace and calcined at 1500°C under an argon atmosphere for 4 hours to obtain gray-black powdered nano-SiC.

[0071] (3) Transfer the SiC from step (2) to a muffle furnace and keep it at 500°C for 4 hours to perform calcination and decarburization to obtain regenerated nano SiC.

[0072] (4) Take 1g of SiC obtained in step (3), add 0.427g of CuO, transfer it to a ball mill jar, and ball mill at 400r / min for 8h to fully load CuO.

[0073] (5) Transfer the powder obtained in step (4) to a muffle furnace and calcine it at 500°C for 3 hours to obtain 30% CuO / SiC composite adsorbent material.

[0074] Example 6 This embodiment provides a method for preparing a SiC-supported CuO composite adsorbent material derived from decommissioned photovoltaic cells, including the following steps: (1) After mixing waste photovoltaic silicon, iron oxide and activated carbon in a ratio of 3:0.148:1.92, the mixture was transferred to a ball mill jar and ball milled at 500 r / min for 6 h.

[0075] (2) The powder from step (1) is transferred to a tube furnace and calcined at 1500°C under an argon atmosphere for 4 hours to obtain gray-black powdered nano-SiC.

[0076] (3) Transfer the SiC from step (2) to a muffle furnace and keep it at 500°C for 4 hours to perform calcination and decarburization to obtain regenerated nano SiC.

[0077] (4) Take 1g of SiC obtained in step (3), add 0.539g of CuO, transfer it to a ball mill jar, and ball mill at 400r / min for 8h to fully load CuO.

[0078] (5) The powder obtained in step (4) is transferred to a muffle furnace and calcined at 500°C for 3 hours to obtain 35% CuO / SiC composite adsorbent material.

[0079] Example 7 This embodiment provides a method for preparing a SiC-supported CuO composite adsorbent material derived from decommissioned photovoltaic cells, including the following steps: (1) After mixing waste photovoltaic silicon, iron oxide and activated carbon in a ratio of 3:0.148:1.92, the mixture was transferred to a ball mill jar and ball milled at 500 r / min for 6 h.

[0080] (2) The powder from step (1) is transferred to a tube furnace and calcined at 1500°C under an argon atmosphere for 4 hours to obtain gray-black powdered nano-SiC.

[0081] (3) Transfer the SiC from step (2) to a muffle furnace and keep it at 500°C for 4 hours to perform calcination and decarburization to obtain regenerated nano SiC.

[0082] (4) Take 1g of SiC obtained in step (3), add 0.667g of CuO, transfer it to a ball mill jar, and ball mill at 400r / min for 8h to fully load CuO.

[0083] (5) Transfer the powder obtained in step (4) to a muffle furnace and calcine it at 500°C for 3 hours to obtain 40% CuO / SiC composite adsorbent material.

[0084] Application Example 1 In this application example, the CuO / SiC composite adsorbent material prepared according to the present invention is used in the adsorption of cefaclor antibiotic. Specifically: First, prepare the cefaclor solution by transferring 5 mg of cefaclor to a volumetric flask, adding 1 L of deionized water, and sonicating for 10 min until completely dissolved. Measure 50 mL of the 5 mg / L cefaclor solution and place it in seven beakers. Add equal amounts of 10% CuO / SiC composite adsorbent, 15% CuO / SiC composite adsorbent, 20% CuO / SiC composite adsorbent, 25% CuO / SiC composite adsorbent, 30% CuO / SiC composite adsorbent, 35% CuO / SiC composite adsorbent, and 40% CuO / SiC composite adsorbent, respectively. Stir the mixture in the dark for 60 min, and filter 1 mL every 10 min. Calculate the cefaclor adsorption rate using liquid chromatography.

[0085] The results are shown in Table 1, and the adsorption rate comparison graph is shown below. Figure 3 As shown. Figure 3The horizontal axis represents adsorption time, and the vertical axis represents the relative residual concentration of pollutants. The adsorption rate is calculated as (1-C / C0)×100%, where C represents the residual concentration of cefaclor solution at adsorption time t, and C0 represents the initial concentration of cefaclor solution.

[0086] from Figure 3 As can be seen, after 1 hour of adsorption, the adsorption rate of cefaclor by the CuO / SiC composite adsorbent material reached the highest value of 98.83%, indicating that the 25% CuO / SiC prepared by the method of the present invention has a large specific surface area. At the same time, the layered structure of the composite material may enhance the adsorption effect by providing additional adsorption active sites.

[0087] Table 1. Adsorption rates of cefaclor by CuO / SiC composite adsorbents with different ratios

[0088] Application Example 2 In this application example, the 25% CuO / SiC composite adsorbent material prepared according to this invention is used in the adsorption of different types of antibiotics. Specifically: First, prepare solutions of different antibiotics. Transfer 10 mg of norfloxacin (NOR), 5 mg of acetaminophen (ACT), 10 mg of sulfamethoxazole (SMX), 10 mg of tetracycline (TC), and 5 mg of cefaclor (CEC) to volumetric flasks, add 1 L of deionized water, and sonicate for 10 min until completely dissolved. Measure 50 mL of each antibiotic solution into five beakers, add an equal amount of 25% CuO / SiC composite adsorbent to each, and stir the mixture in the dark for 60 min. Filter 1 mL every 10 min, and calculate the adsorption rate of the pollutants using liquid chromatography.

[0089] The results are shown in Table 2, and the adsorption rate comparison graph is shown below. Figure 4 As shown. Figure 4 The horizontal axis represents adsorption time, and the vertical axis represents the relative residual concentration of pollutants. The adsorption rate is calculated as (1-C / C0)×100%, where C represents the residual concentration of cefaclor solution at adsorption time t, and C0 represents the initial concentration of cefaclor solution.

[0090] from Figure 4 As can be seen, after 1 hour of adsorption, the 25% CuO / SiC composite adsorbent material exhibits significantly different adsorption performance for different pollutants, with the best removal effect and strong adsorption selectivity for cefaclor.

[0091] Table 2 Adsorption rates of 25% CuO / SiC composite adsorbent for different pollutants

[0092] In summary, the SiC and CuO supported materials prepared using waste photovoltaic silicon as raw materials, as proposed in this invention, not only solve the problem of recycling waste photovoltaic materials but also exhibit better selective adsorption performance with CuO. Both CuO and SiC support materials present a layered structure with a large specific surface area, thus exposing more adsorption active sites. Furthermore, the oxygen vacancies generated by ball milling with SiC compensate for the limited specific surface area of ​​the composite material, providing additional adsorption sites on the material surface, thereby improving the adsorption capacity and enabling efficient degradation of cefaclor in wastewater. Therefore, this invention has significant environmental benefits.

[0093] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for preparing a SiC-supported CuO composite adsorbent material derived from decommissioned photovoltaic systems, characterized in that, include: (1) After mixing waste photovoltaic silicon, iron oxide and activated carbon, the mixture is ball-milled to obtain a first mixture; (2) In an argon atmosphere, the first mixture is calcined at 1300-1500℃ to obtain the calcined product; (3) The calcined product was calcined at 500-800℃ in an air atmosphere to obtain regenerated nano-SiC; (4) After mixing the regenerated nano-SiC with CuO, a second ball milling is performed to obtain a second mixture; (5) The second mixture is calcined to obtain CuO / SiC composite adsorbent material.

2. The preparation method of the decommissioned photovoltaic-derived SiC-supported CuO composite adsorbent material according to claim 1, characterized in that, In step (4), the rotation speed of the second ball mill is 400-700 r / min, and the time is 6-8 h.

3. The preparation method of the decommissioned photovoltaic-derived SiC-supported CuO composite adsorbent material according to claim 1, characterized in that, In step (5), the calcination temperature is 500-800℃ and the time is 2-4h.

4. The preparation method of the decommissioned photovoltaic-derived SiC-supported CuO composite adsorbent material according to claim 1, characterized in that, In step (4), the regenerated nano-SiC and CuO are mixed at a mass ratio of 1:0.25-0.

333.

5. The preparation method of the decommissioned photovoltaic-derived SiC-supported CuO composite adsorbent material according to claim 1, characterized in that, In the CuO / SiC composite adsorbent material, CuO particles are loaded on the surface of regenerated nano-SiC to form a layered porous structure.

6. The preparation method of the decommissioned photovoltaic-derived SiC-supported CuO composite adsorbent material according to claim 1, characterized in that, In step (1), the rotation speed of the first ball mill is 500-700 r / min, and the time is 6-8 h.

7. The preparation method of the decommissioned photovoltaic-derived SiC-supported CuO composite adsorbent material according to claim 1, characterized in that, In step (2), the calcination time is 4-6 hours.

8. The preparation method of the decommissioned photovoltaic-derived SiC-supported CuO composite adsorbent material according to claim 1, characterized in that, In step (3), the calcination time is 4-6 hours.

9. The application of the CuO / SiC composite adsorbent material prepared by the method for preparing decommissioned photovoltaic-derived SiC-supported CuO composite adsorbent material as described in claim 1 in the removal of antibiotics from water.

10. The application according to claim 9, characterized in that, The antibiotics include cefaclor, tetracycline, and sulfamethoxazole.

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