Piezoelectric material prepared by synthesizing metal-doped polytetrafluoroethylene powder through ball milling method and application method of piezoelectric material

Abstract

Requirements for human life and industrial activities result in large inrush of toxic contaminants into aquatic ecosystems. Especially, antibiotics, dye molecules, bacteria, heavy metal ions and other organic pollutants seriously threaten the health and continuous existence of organisms. Therefore, degradation or elimination of pollutants in waste water and purification of waste water are main problems needing to be solved. Therefore, a wastewater purification technology which is low in cost, high in efficiency and easy to spread needs to be explored. The invention relates to a preparation method and application of a novel metal-doped polytetrafluoroethylene piezoelectric catalytic material, in particular to application of the novel metal-doped polytetrafluoroethylene piezoelectric catalytic material in piezoelectric catalytic reaction, and belongs to research in the field of preparation and application of star functional materials. The activity of the novel piezoelectric catalyst is activated based on ultrasonic induction, and a wide prospect is provided for wastewater purification.

Description

[Technical field]

[0001] The present invention provides a novel metal-doped polytetrafluoroethylene piezoelectric material prepared by ball milling and its application, especially relates to the application in the field of interface catalytic reaction and water purification, belonging to the research of novel functional material preparation and application field. [Background technology]

[0002] With the rapid development of industrialization, environmental water pollution has become increasingly prominent, especially the problem of bioactive antibiotic pollution. Due to the high persistence of antibiotics in aquatic environments and their resistance to biodegradation, they will accumulate in the human body through the food chain that seriously threatens the environment and human health. Antibiotics are a widely used broad-spectrum antibacterial drug used to prevent and treat bacterial infections in humans and livestock. Therefore, an environmentally friendly and clean technology is needed to eliminate them.

[0003] Piezoelectric catalytic technology is an emerging advanced oxidation technology with obvious advantages over traditional oxidation technology, such as activation by environmental vibration and no secondary pollution. CN202311676637.8 discloses a preparation method and application of bismuth molybdate piezoelectric degradation of antibiotic materials in water. The piezoelectric catalyst prepared by the invention has good piezoelectric catalytic performance and can achieve an antibiotic degradation rate of 60%-99%. CN202210627843.9 discloses a water-driven molybdenum disulfide / carbon felt flexible piezoelectric material and its preparation method and application for the degradation of antibiotics. It can produce a stronger piezoelectric effect under the action of mechanical forces of the same intensity and has excellent pollutant degradation efficiency.

[0004] In view of the cumbersome existing catalyst synthesis methods, the present invention provides a piezoelectric catalyst synthesized by ball milling of metal ion-doped polytetrafluoroethylene. The prepared piezoelectric catalyst uses ultrasound to improve energy utilization efficiency and exhibits excellent performance in degrading antibiotics in water without any exogenous oxidants. 92% of tetracycline can be degraded in 80 minutes. Therefore, the new catalyst can provide new insights into the field of environmental remediation water treatment. [Summary of the invention]

[0005] [Technical issues to be solved]

[0006] The purpose of the present invention is to solve the cumbersome synthesis method of existing piezoelectric catalysts and propose a catalyst synthesized by ball milling method. When applied to antibiotic degradation, it is found that the catalyst exhibits extremely high performance in degrading antibiotics. The new catalyst provides new insights into the degradation of organic antibiotics.

[0007] Technical solution:

[0008] The preparation method and application of a novel piezoelectric polymer described in the present invention, the technical scheme and steps thereof are as follows:

[0009] Metal chloride and polytetrafluoroethylene are put into a ball mill in a proportion between 1:19 and 5:19, and the synthetic material is obtained by ball milling for 3 to 6 hours.

[0010] Compared with the prior art, the advantages and beneficial effects of the present invention are:

[0011] The novel metal-doped piezoelectric catalyst provided by the present invention has a simple operation process, low cost, and is easy to mass produce. The catalyst has a very outstanding purification effect and good stability in the catalytic system, providing a scientific basis for the subsequent catalytic degradation of organic pollutants. The catalytic piezoelectric material prepared by the present invention has both a long life and high catalytic activity, which can meet the needs of environmental engineering applications.

Brief Description of the Drawings

[0012] Figure 1 This is a scanning electron microscope photograph of a novel metal-doped piezoelectric catalytic material prepared by the present invention.

[0013] Figure 2 This is a diagram showing the effect of the novel metal-doped piezoelectric catalytic material prepared by the present invention on the rapid degradation of tetracycline. [Specific implementation method]

[0014] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and technical solutions.

[0015] (1) Metal chloride and polytetrafluoroethylene are placed in a ball mill in a ratio of 1:19 to 5:19, and the mixture is ball milled for 3 to 6 hours to obtain a synthetic material.

[0016] (2) Take 100 mL of organic wastewater, add the synthesized new catalyst, put it into an ultrasonic cleaning machine, take a sample every 10 minutes, and run a liquid chromatograph to determine the concentration of organic pollutants. The results are shown in the attached figure. Figure 2 The results show that the novel composite material of the present invention has a relatively obvious degradation effect on pollutants such as carbamazepine, levofloxacin, chlortetracycline, oxytetracycline, tetracycline, etc., and can be applied to the deep treatment of organic wastewater and other fields. It can be seen that the present invention has a wide range of applications in the field of water treatment.

Claims

1. A method for preparing piezoelectric materials by synthesizing metal-doped polytetrafluoroethylene powder by ball milling and its application, the technical scheme and steps are as follows: Metal chloride and polytetrafluoroethylene are placed in a ball mill in proportion and ball-milled for several hours to obtain a synthetic material.

2. The metal chloride according to claim 1 can be CuCl2, AlCl3, or ZnCl2.

3. According to claim 1, the ratio of metal chloride to polytetrafluoroethylene is between 1:19 and 5:

19.

4. According to claim 1, the ball milling time is 3-6 hours.

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