Preparation method and application of porous cuprous oxide-titanium dioxide composite material
By preparing porous cuprous oxide-titanium dioxide composite materials, the problems of low efficiency of titanium dioxide photocatalytic materials and limited catalytic effect of cuprous oxide particle structure were solved, and the effect of efficient degradation of antibiotics and formaldehyde was achieved.
Patent Information
- Application Number
- CN202510609264.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-13
- Publication Date
- 2025-10-21
AI Technical Summary
Existing titanium dioxide photocatalytic materials have low efficiency when excited by sunlight, the photogenerated charges are easy to recombine, and the commercial powder structure requires complex recycling. The catalytic effect of cuprous oxide particle structure is limited.
A porous cuprous oxide-titanium dioxide composite material was prepared by a one-step solvothermal method. Cu2O was nucleated by coating TiO2 particles with cobalt-iron Prussian blue-like complex nanoparticles to form a porous structure and encapsulate TiO2 particles, thereby constructing a heterojunction to improve photocatalytic performance.
It significantly improves the efficiency of photocatalytic degradation of antibiotic TCH and formaldehyde in the air. The porous structure increases the effective specific surface area and mass transfer, while the heterojunction structure enhances the photocharge separation efficiency.
Smart Images
Figure CN120815535A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of photocatalytic materials, and in particular to a preparation method and application of a porous cuprous oxide-titanium dioxide composite material, in particular to an application in environmental purification. Background Art
[0002] Indoor air formaldehyde is a serious "invisible killer" that threatens human health. It primarily originates from decoration materials, furniture, adhesives, and other sources. When indoor formaldehyde levels exceed standards, long-term exposure can irritate the mucous membranes of the eyes, nose, and throat, causing symptoms such as stinging, tearing, frequent coughing, and sneezing, severely impacting daily life. Furthermore, formaldehyde damages the respiratory system, increasing the risk of illnesses like asthma and bronchitis, with more pronounced effects on children, the elderly, and those with respiratory conditions. Long-term exposure can also weaken the immune system and trigger various infectious diseases. More seriously, formaldehyde has been classified as a Group 1 carcinogen by the International Agency for Research on Cancer. Long-term exposure to excessive formaldehyde in indoor environments significantly increases the risk of cancers such as leukemia and nasopharyngeal carcinoma, posing a significant threat to life and health. To fundamentally address this issue, research into the mechanisms by which formaldehyde is removed from air and its environmental behavior is essential.
[0003] Tetracycline antibiotics are inexpensive, broad-spectrum antimicrobial agents widely used in aquaculture, healthcare, and agriculture. However, due to their resistance to degradation in the environment, they have caused serious pollution problems and attracted widespread public attention. Tetracyclines have been detected in soil, water, and other environmental environments. In addition to causing chemical pollution, antibiotics in the environment may also induce the development of resistant microorganisms and resistance genes, accelerating the spread and transmission of antibiotic resistance. These resistant microorganisms can enter the human body through direct or indirect contact, enhancing drug resistance and posing a threat to public health. The increasing and spreading of drug resistance in pathogens has become a major challenge facing global disease treatment. To fundamentally address this issue, research into the removal mechanisms and environmental behavior of antibiotics in the environment is essential.
[0004] Photocatalytic technology, using semiconductors and their derivatives as a medium, is a sustainable, pollution-free, and cost-effective means of utilizing clean, sustainable solar energy to treat toxic substances such as wastewater and exhaust gases, improving environmental cleanliness and effectively addressing environmental challenges facing humanity. Titanium dioxide is the most common and inexpensive photocatalytic material. However, due to its wide band gap, it can only be excited by ultraviolet light and cannot fully utilize sunlight. Furthermore, its photogenerated charges have a short lifetime and are prone to recombination, resulting in low charge separation efficiency. Commercial titanium dioxide is P25, a powdery material. In practical production and use, catalyst recovery requires complex steps such as filtration and centrifugation, making it difficult. Cuprous oxide (Cu2O), a p-type semiconductor with a narrow energy bandgap, can utilize visible light for photocatalysis, thus addressing the shortcomings of titanium dioxide. Furthermore, the two can form a heterojunction, further inhibiting the rapid recombination of photogenerated electrons and holes, expanding the light absorption range, and enhancing photocatalytic activity. However, currently available Cu2O is mostly solid, either as large particles or thin films, with a small specific surface area and limited catalytic effectiveness. Summary of the Invention
[0005] The object of the present invention is to provide a method for preparing a porous cuprous oxide-titanium dioxide composite material and its application in view of the above-mentioned deficiencies in the prior art.
[0006] The purpose of the present invention is achieved by the following technical solutions: A method for preparing a porous cuprous oxide-titanium dioxide composite material, characterized in that the preparation method comprises the following steps: Cobalt acetate, sodium citrate, and potassium ferrocyanide are dissolved in water in a certain proportion, and aged at a certain temperature to obtain cobalt-iron Prussian blue complex nanoparticles; Copper nitrate, formic acid, ammonia water, hexadecyltrimethylammonium bromide and titanium dioxide are dissolved and dispersed in a mixed solvent of ethanol and water in a certain ratio; A methanol solution containing cobalt-iron Prussian blue complex nanoparticles is added to the mixed solvent, and a porous cuprous oxide-titanium dioxide composite photocatalytic material is prepared by a one-step solvothermal method. The porous cuprous oxide-titanium dioxide composite photocatalytic material includes cuprous oxide particles with a porous structure, and titanium dioxide nanoparticles are uniformly distributed on the surface and inside of the cuprous oxide particles.
[0007] The usage ratio of the copper nitrate, the formic acid, the ammonia water, the hexadecyltrimethylammonium bromide and the titanium dioxide is 1-10 g: 1-10 ml: 1-5 ml: 1-10 mg: 1-50 mg.
[0008] The ratio of the ethanol to the water in the mixed solution is 1:4 to 4:1.
[0009] The ratio of the cobalt-iron Prussian blue complex nanoparticles added to the methanol solution is 1 mg / ml.
[0010] The amount of the methanol solution containing the cobalt-iron Prussian blue complex nanoparticles added is 1-10 ml.
[0011] The reaction temperature of the one-step solvent thermal method is 140-180° C., and the reaction time is 1-5 hours.
[0012] The pore size of the cuprous oxide particles is 100-200 nm.
[0013] An application of a porous cuprous oxide-titania composite photocatalytic material prepared according to the preparation method of the porous cuprous oxide-titania composite material is characterized in that the porous cuprous oxide-titania composite photocatalytic material is used for environmental purification.
[0014] The porous cuprous oxide-titanium dioxide composite photocatalytic material is used as a catalyst for treating the antibiotic TCH in sewage.
[0015] The porous cuprous oxide-titanium dioxide composite photocatalytic material is used as a catalyst to remove formaldehyde in the air.
[0016] The advantages of the present invention are: (1) A porous cuprous oxide-titanium dioxide composite photocatalytic material structure was prepared by a one-step method using cobalt-iron Prussian blue (CoFe-PBA) nanoparticles. The Cu2O particles exhibited a porous structure, effectively increasing their effective specific surface area and mass transfer during the photocatalytic process. This is because the CoFe-PBA nanoparticles were encapsulated in the Cu2O structure during the initial nucleation and growth phase; as the reaction proceeded, the CoFe-PBA nanoparticles underwent a self-dissolution process, thereby forming a three-dimensional pore structure. The encapsulated nano-titanium dioxide particles (P25) did not undergo self-dissolution and were uniformly encapsulated in the interior and surface, forming a multi-point heterojunction structure, thereby improving the photocharge separation efficiency. This unique porous morphology and encapsulation structure endowed Cu2O / TiO2 with excellent photocatalytic performance.
[0017] (2) The porous cuprous oxide-titania composite photocatalytic material prepared by the present invention was used as a catalyst to degrade the antibiotic TCH. The experimental results showed that compared with the control samples (solid cuprous oxide, hollow cuprous oxide, and solid cuprous oxide-titania composite photocatalytic material), the degradation rate of the porous cuprous oxide-titania composite material was as high as 92.5% after photocatalytic degradation of a 50 ppm antibiotic (TCH) aqueous solution for 10 minutes.
[0018] The porous cuprous oxide-titanium dioxide composite photocatalytic material prepared by the present invention was loaded onto a filter and applied to remove formaldehyde from the air. Experimental results showed that, compared with control samples (solid cuprous oxide, hollow cuprous oxide, and solid cuprous oxide-titanium dioxide composite photocatalytic materials), the formaldehyde concentration in the air treated with the porous cuprous oxide-titanium dioxide composite photocatalytic material was 0.102 ppm after 24 hours of photocatalytic degradation, significantly exceeding the removal performance of the other control samples.
[0019] Therefore, the porous cuprous oxide-titanium dioxide composite photocatalytic material of the present invention has better photocatalytic degradation performance of TCH and formaldehyde as a catalyst. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is an SEM image of the porous cuprous oxide-titanium dioxide composite photocatalytic material (P-Cu2O / P25) prepared in Example 1 provided by the present invention; Figure 2 The SEM images of the cobalt-iron Prussian blue complex (CoFe-PBA) nanoparticles and commercial titanium dioxide (P25) in the present invention are shown; Figure 3 These are SEM images of solid cuprous oxide (S-Cu2O) and solid cuprous oxide-titanium dioxide (S-Cu2O / P25) in the present invention.
[0021] Figure 4 This is a graph showing the degradation rate of TCH for the porous cuprous oxide-titania composite material prepared in Example 1 of the present invention, as well as samples from other examples and comparative samples.
[0022] Figure 5 This is a graph showing the formaldehyde content in the air after treatment with the porous cuprous oxide-titanium dioxide composite photocatalytic material prepared in Example 1 provided by the present invention, as well as samples from other examples and comparative samples. DETAILED DESCRIPTION
[0023] The features of the present invention and other related features are further described in detail below through embodiments in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art: Example 1: The preparation method of the porous cuprous oxide-titanium dioxide composite photocatalytic material in this embodiment includes the following steps: 1) Dissolve 0.3g of cobalt acetate and 0.294g of sodium citrate in 80ml of deionized water; dissolve 0.264g of potassium ferrocyanide in 120ml of deionized water. Mix the two solutions, heat to 80°C, age for 6h, and centrifuge to dry to obtain cobalt-iron Prussian blue (CoFe-PBA) nanoparticles. Titanium dioxide was commercial P25.
[0024] 2) Dissolve 5 g of copper nitrate trihydrate, 2 ml of formic acid, 2.5 ml of 24% ammonia water, 5 mg of hexadecyltrimethylammonium bromide, and 10 mg of titanium dioxide in 60 ml of a mixture of ethanol and water (2:1).
[0025] 3) Then, 5 ml of a methanol solution of cobalt-iron Prussian blue (CoFe-PBA) nanoparticles was added to the mixed solution, and after thorough stirring, the mixture was transferred to a reactor and subjected to a solvothermal reaction at 145°C for 2 h. After the reaction, the mixture was naturally cooled to room temperature, centrifuged, washed with deionized water and anhydrous ethanol, and then dried in a vacuum oven at 60°C to obtain a porous cuprous oxide-titanium dioxide composite photocatalytic material, P-Cu2O / P25-1.
[0026] The morphology of the porous cuprous oxide-titanium dioxide composite photocatalytic material and the pre-sample prepared in this example was characterized. The SEM image of the porous cuprous oxide-titanium dioxide composite photocatalytic material was obtained, as shown in FIG. Figure 1 As shown, the cuprous oxide particles have a significantly porous structure with a pore size of 100-200 nm. Titanium dioxide nanoparticles are evenly distributed on the surface and inside of the cuprous oxide particles. The SEM images of the cobalt-iron Prussian blue complex nanoparticles obtained in step 1) and the P25 nanoparticles used are shown in FIG. Figure 2 As shown, the cobalt-iron Prussian blue complex nanoparticles are 100-200 nm, and the P25 nanoparticles are 25 nm.
[0027] Embodiment 2: This embodiment differs from Embodiment 1 in that: Step 2) and Step 3) of this embodiment are different from those of Embodiment 1.
[0028] Specifically, the preparation steps in this embodiment are: 2) Dissolve 1 g of copper nitrate trihydrate, 1 ml of formic acid, 1 ml of 24% ammonia water, 1 mg of hexadecyltrimethylammonium bromide, and 1 mg of titanium dioxide in 60 ml of a mixture of ethanol and water (1:4).
[0029] 3) To the mixed solution, 1 ml of a methanol solution of cobalt-iron Prussian blue (CoFe-PBA) nanoparticles was added, the mixture was thoroughly stirred, and the mixture was transferred to a reactor for solvothermal reaction at 140°C for 1 hour. After the reaction, the mixture was naturally cooled to room temperature, centrifuged, washed with deionized water and anhydrous ethanol, and then dried in a vacuum oven at 60°C to obtain a porous cuprous oxide-titanium dioxide composite photocatalytic material, P-Cu2O / P25-2.
[0030] Embodiment 3: This embodiment differs from Embodiment 1 and Embodiment 2 in that: Step 2) and Step 3) of this embodiment are different from those of Embodiment 1 and Embodiment 2.
[0031] Specifically, the preparation steps in this embodiment are: 2) Dissolve 10 g of copper nitrate trihydrate, 10 ml of formic acid, 5 ml of 24% ammonia water, 10 mg of hexadecyltrimethylammonium bromide, and 50 mg of titanium dioxide in 60 ml of a mixture of ethanol and water (4:1).
[0032] 3) To the mixed solution, 10 ml of a methanol solution of cobalt-iron Prussian blue (CoFe-PBA) nanoparticles was added, the mixture was thoroughly stirred, and the mixture was transferred to a reactor for a solvothermal reaction at 180°C for 5 h. After the reaction, the mixture was naturally cooled to room temperature, centrifuged, washed with deionized water and anhydrous ethanol, and then dried in a vacuum oven at 60°C to obtain a porous cuprous oxide-titanium dioxide composite photocatalytic material, P-Cu2O / P25-3.
[0033] Embodiment 4: This embodiment differs from Embodiment 1, Embodiment 2 and Embodiment 3 in that: Step 2) and Step 3) of this embodiment are different from those of Embodiment 1, Embodiment 2 and Embodiment 3.
[0034] Specifically, the preparation steps in this embodiment are: 2) Dissolve 5 g of copper nitrate trihydrate, 2 ml of formic acid, 2 ml of 24% ammonia water, 5 mg of hexadecyltrimethylammonium bromide, and 20 mg of titanium dioxide in 60 ml of a 1:1 mixture of ethanol and water.
[0035] 3) To the mixed solution, 5 ml of a methanol solution of cobalt-iron Prussian blue (CoFe-PBA) nanoparticles was added, the mixture was thoroughly stirred and mixed, and then the mixture was transferred to a reactor for a solvothermal reaction at 165°C for 3 h. After the reaction, the mixture was naturally cooled to room temperature, centrifuged, washed with deionized water and anhydrous ethanol, and then dried in a vacuum oven at 60°C to obtain a porous cuprous oxide-titanium dioxide composite photocatalytic material, P-Cu2O / P25-4.
[0036] The porous cuprous oxide-titanium dioxide composite photocatalytic materials prepared by the above preparation method all have cuprous oxide particles with a significant porous structure, and titanium dioxide nanoparticles are evenly distributed on the surface and inside of the cuprous oxide particles.
[0037] In order to prove the effect of the above embodiment, a comparative test was conducted on this embodiment, including the following: Comparative Example 1: A method for preparing a solid cuprous oxide material, comprising the following steps: A solution containing 5 g of copper nitrate trihydrate, 2 ml of formic acid, 2.5 ml of ammonia water (24%), 5 mg of hexadecyltrimethylammonium bromide and 10 mg of titanium dioxide was dissolved and dispersed in a mixed solution of 60 ml of ethanol and water (2:1). After sufficient stirring, the mixture was transferred to a reactor and subjected to a solvent thermal reaction at 145 ° C for 2 h. After the reaction was completed, the mixture was naturally cooled to room temperature, centrifuged, washed with deionized water and anhydrous ethanol, and then dried in a vacuum oven at 60 ° C to obtain a solid cuprous oxide material, S-Cu2O, see Figure 3 a.
[0038] Comparative Example 2: A method for preparing a porous cuprous oxide material, comprising the following steps: 5 g of copper nitrate trihydrate, 2 ml of formic acid, 2.5 ml of ammonia water (24%) and 5 mg of hexadecyltrimethylammonium bromide were dissolved and dispersed in a mixed solution of 60 ml of ethanol and water (2:1), and then 5 ml of a methanol solution of cobalt iron Prussian blue complex (CoFe-PBA) nanoparticles was added. After thorough stirring, the mixture was transferred to a reactor and subjected to a solvothermal reaction at 145°C for 2 h. After the reaction, it was naturally cooled to room temperature, centrifuged, washed with deionized water and anhydrous ethanol, and then dried in a vacuum oven at 60°C to obtain a porous cuprous oxide-titanium dioxide composite photocatalytic material, P-Cu2O.
[0039] The ratio of the mixed solution of Comparative Example 2 is consistent with that of Comparative Example 1. The difference between Comparative Example 2 and Comparative Example 1 is that the cuprous oxide material in Comparative Example 1 is solid, while the cuprous oxide material in Comparative Example 2 is porous.
[0040] Comparative Example 3: A method for preparing a solid cuprous oxide-titanium dioxide composite photocatalytic material, the steps are as follows: A solution containing 5 g of copper nitrate trihydrate, 2 ml of formic acid, 2.5 ml of ammonia water (24%), 5 mg of hexadecyltrimethylammonium bromide and 10 mg of titanium dioxide was dissolved and dispersed in a mixed solution of 60 ml of ethanol and water (2:1). After thorough stirring, the mixture was transferred to a reactor and subjected to a solvothermal reaction at 145 °C for 2 h. After the reaction, the mixture was naturally cooled to room temperature, centrifuged, washed with deionized water and anhydrous ethanol, and then dried in a vacuum oven at 60 °C to obtain a solid cuprous oxide-titanium dioxide composite photocatalytic material, S-Cu2O / P25, see Figure 3 b.
[0041] Comparative Example 3 and Comparative Example 2 have the same ratio of mixed solutions. The difference between Comparative Example 3 and Comparative Example 2 is that in Comparative Example 3, titanium dioxide nanoparticles are evenly distributed on the surface and inside of the porous copper oxide material.
[0042] Test Example 1: The porous cuprous oxide-titanium dioxide composite material prepared in Example 1 was used as a catalyst to degrade the antibiotic TCH. The specific steps were as follows: First, prepare several photocatalytic test tubes wrapped with aluminum foil, weigh 10 mg of dried cuprous oxide-titanium dioxide composite material and add it to the prepared photocatalytic test tubes; secondly, measure 30 mL of 50 ppm TCH solution and add it to the above test tubes, disperse it evenly and let it stand in the dark for 15 minutes; finally, transfer the test tubes to a photochemical reactor (full spectrum, intensity 300W, stirring speed of 800r / min) for photocatalytic degradation reaction, and take out the degradation solution in the corresponding photocatalytic test tubes when the catalytic time is 5, 10, 15, 20, 25 and 30 minutes, centrifuge it, use a UV-visible spectrophotometer to measure the absorbance of the supernatant for characterization analysis (357nm), and then determine the concentration of TCH in the solution after photodegradation according to the standard curve. The operations of other example samples and comparative example samples are the same. For specific results, see Figure 4 .
[0043] Depend on Figure 4 The results show that after 10 minutes of photocatalytic reaction, the degradation rate of TCH by the porous cuprous oxide-titania composite material in Example 1 of the present invention has reached 92.5% at 10 minutes, far exceeding that of other comparative samples. The P-Cu2O / P25 obtained in other examples also showed even better performance. This is because the cuprous oxide-titania composite material prepared by the present invention has a unique porous structure, which has a larger catalytic area and is conducive to mass transfer during the catalytic process; at the same time, the uniform distribution of P25 nanoparticles in its porous structure further constructs a multi-site heterojunction structure, enhances the charge separation efficiency, and improves the final photocatalytic TCH degradation efficiency.
[0044] The above results show that the porous cuprous oxide-titanium dioxide composite material prepared by the present invention exhibits excellent TCH degradation performance when used as a catalyst for the degradation of antibiotic TCH.
[0045] Test Example 2: The porous cuprous oxide-titanium dioxide composite photocatalytic material prepared in the example and other comparative materials were used as catalysts to remove formaldehyde in the air. The specific steps are as follows: First, 50 mg of catalyst material was filled into a porous filter. The filter was placed at 1 m 3 In a sealed glass test chamber, formaldehyde was introduced into the test chamber to a concentration of 1 mg / m 3(0.810 ppm). Close the experimental chamber, activate the internal air circulation system (5 m / s), and turn on ten 5W white LED lamps placed 1 m outside the chamber, above the top, to begin the photocatalytic experiment. After 24 hours, measure the formaldehyde concentration in the chamber.
[0046] The other examples and comparative examples were operated in the same manner. Figure 5 .
[0047] Depend on Figure 5 The results show that after 24 hours of photocatalytic reaction, the formaldehyde content in the air treated by the porous cuprous oxide-titanium dioxide composite photocatalytic material in Example 1 of the present invention is reduced to 0.102 ppm, and the removal performance is far superior to other comparative samples. The P-Cu2O / P25 obtained in other embodiments also shows more excellent performance. Similarly, this is because the cuprous oxide-titanium dioxide composite photocatalytic material prepared by the present invention has a unique porous structure, which has a larger catalytic area and is conducive to mass transfer in the catalytic process; at the same time, the uniform distribution of P25 nanoparticles in its porous structure further constructs a multi-site heterojunction structure, enhances the charge separation efficiency, and improves the final photocatalytic formaldehyde degradation efficiency.
[0048] The air purification material prepared by the method of the present invention has an excellent formaldehyde removal effect and can significantly reduce the concentration of formaldehyde in the air, thereby improving the cleanliness of the air and protecting human health.
[0049] The above results show that the porous cuprous oxide-titanium dioxide composite photocatalytic material prepared by the present invention exhibits excellent formaldehyde degradation performance when used as a catalyst to degrade formaldehyde in the air.
[0050] Although the above embodiments have described in detail the concepts and embodiments of the present invention with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, so they are not described in detail here.
Claims
1. A method for preparing a porous cuprous oxide-titanium dioxide composite material, characterized in that: The preparation method comprises the following steps: Cobalt acetate, sodium citrate, and potassium ferrocyanide are dissolved in water in a certain proportion, and aged at a certain temperature to obtain cobalt-iron Prussian blue complex nanoparticles; Copper nitrate, formic acid, ammonia water, hexadecyltrimethylammonium bromide and titanium dioxide are dissolved and dispersed in a mixed solvent of ethanol and water in a certain ratio; A methanol solution containing cobalt-iron Prussian blue complex nanoparticles is added to the mixed solvent, and a porous cuprous oxide-titanium dioxide composite photocatalytic material is prepared by a one-step solvothermal method. The porous cuprous oxide-titanium dioxide composite photocatalytic material includes cuprous oxide particles with a porous structure, and titanium dioxide nanoparticles are uniformly distributed on the surface and inside of the cuprous oxide particles.
2. The method for preparing a porous cuprous oxide-titanium dioxide composite material according to claim 1, wherein: The usage ratio of the copper nitrate, the formic acid, the ammonia water, the hexadecyltrimethylammonium bromide and the titanium dioxide is 1-10 g: 1-10 ml: 1-5 ml: 1-10 mg: 1-50 mg.
3. The method for preparing a porous cuprous oxide-titanium dioxide composite material according to claim 1, wherein: The ratio of the ethanol to the water in the mixed solution is 1:4 to 4:
1.
4. The method for preparing a porous cuprous oxide-titanium dioxide composite material according to claim 1, wherein: The ratio of the cobalt-iron Prussian blue complex nanoparticles added to the methanol solution is 1 mg / ml.
5. The method for preparing a porous cuprous oxide-titanium dioxide composite material according to claim 1, wherein: The amount of the methanol solution containing the cobalt-iron Prussian blue complex nanoparticles added is 1-10 ml.
6. The method for preparing a porous cuprous oxide-titanium dioxide composite material according to claim 1, wherein: The reaction temperature of the one-step solvent thermal method is 140-180° C., and the reaction time is 1-5 hours.
7. The method for preparing a porous cuprous oxide-titanium dioxide composite material according to claim 1, wherein: The pore size of the cuprous oxide particles is 100-200 nm.
8. Use of a porous cuprous oxide-titania composite photocatalytic material prepared by the method for preparing a porous cuprous oxide-titania composite material according to any one of claims 1 to 7, characterized in that: The porous cuprous oxide-titanium dioxide composite photocatalytic material is used for environmental purification.
9. Use of the porous cuprous oxide-titania composite photocatalytic material prepared according to the method for preparing the porous cuprous oxide-titania composite material according to claim 8, characterized in that: The porous cuprous oxide-titanium dioxide composite photocatalytic material is used as a catalyst for treating the antibiotic TCH in sewage.
10. Use of the porous cuprous oxide-titania composite photocatalytic material prepared according to the method for preparing the porous cuprous oxide-titania composite material according to claim 8, characterized in that: The porous cuprous oxide-titanium dioxide composite photocatalytic material is used as a catalyst to remove formaldehyde in the air.