CN-117548132-B - Nanocomposite for removing antibiotics in water and removing device using nanocomposite

Abstract

The invention provides a nanocomposite for removing antibiotics in water and a removing device using the nanocomposite, and relates to the field of wastewater treatment. The preparation method of the nanocomposite comprises the following materials, by weight, 4g of T i 3 Al C 2 powder, 80mL of hydrochloric acid with the concentration of 9 mol/L, 6.4g of lithium fluoride, 150mL of deionized water, 80mL of absolute ethyl alcohol and 0.015-0.85mL of tetrabutyl titanate. Antibiotic in water is removed through the TiO 2 @MXene nanocomposite material under the visible light condition in cooperation with persulfate, 97.12% removal effect of tetracycline can be achieved in 50mi < n >, and the recoverability test shows that the removal rate of the tetracycline is still 89.34% even after four cycles. Meanwhile, XRD spectrum of the T iO 2 @MXene nanocomposite after tetracycline degradation shows no obvious change in surface characteristics, and shows that the composite has good reusability and stability.

Inventors

• ZHU DAHAI
• LIU MIAOMIAO
• LI ZEDIAN
• ZHANG HAOHAN
• Yan Xuchen
• WANG JINGYAN
• Xun Wenyu
• GAO XIANGYU
• YU WEI
• LI YIFAN
• BING NAICI
• LI YANFEN
• WU JIAJIA
• WANG JIANJIE
• YUE TINGTING

Assignees

• 上海第二工业大学

Dates

Publication Date

20260505

Application Date

20231113

Claims (1)

1. 1. The application of the nanocomposite in removing antibiotics in water is characterized in that the nanocomposite is prepared from the following materials, by weight, ti 3 AlC 2 powder 4g, hydrochloric acid with the concentration of 9 mol/L80 mL, lithium fluoride 6.4g, deionized water 150mL, absolute ethyl alcohol 80mL and tetrabutyl titanate 0.015-0.85mL; The preparation process of the nanocomposite comprises the following steps: Etching of Ti 3 AlC 2 Adding hydrochloric acid into a magnetic stirrer, adding lithium fluoride into the hydrochloric acid under stirring, continuously reacting for 20min at normal temperature, slowly adding Ti 3 AlC 2 powder, keeping the suspension in the magnetic stirrer at 55 ℃, continuously reacting for 72h, standing the obtained mixed liquid for sedimentation, filtering supernatant, repeating the above operation for three times to obtain black precipitate, washing the black precipitate with deionized water for multiple times, putting the black precipitate into a centrifuge, adding deionized water into the centrifuge, adding absolute ethyl alcohol, centrifuging the precipitate at 7000rpm until the solution is neutral, finally filtering supernatant, and drying the precipitate to obtain a black Ti 3 C 2 T x sample; S2, final synthesis Putting 80mL of deionized water into a beaker, adding 1g of Ti 3 C 2 T x material into an ultrasonic machine, performing ultrasonic dispersion for 15-30min, then adding a proper amount of tetrabutyl titanate and 40-mL absolute ethyl alcohol into the beaker, stirring for 4-7h under the magnetic stirring condition, then putting the obtained solution into a high-pressure reaction kettle with a polytetrafluoroethylene lining, compounding the Ti 3 C 2 T x material with TiO 2 by utilizing a hydrothermal method, taking a black precipitation part in the solution after synthesis, putting the black precipitation part into a centrifuge, washing with deionized water for three times at 3000rpm, washing with ethanol for three times to remove impurities in the precipitate, and finally putting the washed product into a vacuum drying box at 60-100 ℃ for drying for 12-24h to obtain the TiO 2 @Mne composite material with weight of 10% -weight.40%; In the step S1, the specific operation of drying the precipitate is that the precipitate is put into a vacuum drying box and dried for 12-24 hours under the environmental condition of 60 ℃; In the step S2, the solution is reacted in a polytetrafluoroethylene hydrothermal reactor for 15-20h under the temperature condition of 160 ℃.

Description

Nanocomposite for removing antibiotics in water and removing device using nanocomposite Technical Field The invention relates to the technical field of wastewater treatment, in particular to a nanocomposite for removing antibiotics in water and a removing device using the nanocomposite. Background The widespread use of antibiotics, leading to a wide distribution in the natural environment, has the enrichment of which constitutes a major hazard to the natural environment and to biological health. Antibiotics are typically degraded by biological treatment, membrane filtration, adsorption, etc. However, biodegradation technology cannot treat antibiotics effectively due to its high toxicity and limited yield. In the membrane and adsorptive separation process, the antibiotic requires further concentration treatment. Therefore, it is important to develop an innovative, efficient and durable technique for removing antibiotics from the environment. Photocatalysis is an attractive advanced oxidation technology due to its sustainability and small environmental hazards. More importantly, the organic pollutant can be effectively removed by only utilizing active oxygen substances generated by solar energy. Whereas the ti O 2 photocatalyst is widely studied for its excellent ability to degrade organic contaminants in water. However, the T iO 2 has defects of fast electron-hole recombination, poor quantum yield, and the like, resulting in inefficiency. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a nanocomposite for removing antibiotics in water and a removing device using the nanocomposite, and solves the problem of low removing efficiency caused by the defects of fast electron hole recombination and poor quantum yield of a commonly used photocatalyst. The nano composite material for removing antibiotics in water is prepared from the following materials, by weight, T i 3Al C2, 4g of powder, 80mL of hydrochloric acid with the concentration of 9 mol/L, 6.4g of lithium fluoride, 150mL of deionized water, 80mL of absolute ethyl alcohol and 0.015-0.85mL of tetrabutyl titanate; The preparation process of the nanocomposite comprises the following steps: Etching of S1.T i 3A l C2 Adding hydrochloric acid into a magnetic stirrer, adding lithium fluoride into the hydrochloric acid under stirring, continuously reacting for 20min at normal temperature, slowly adding Ti 3Al C2 powder, keeping the suspension in the magnetic stirrer at 55 ℃, continuously reacting for 72h, standing the obtained mixed liquid for sedimentation, filtering supernatant, repeating the above operation for three times to obtain black precipitate, washing the black precipitate with deionized water for multiple times, putting the black precipitate into a centrifuge, adding deionized water into the centrifuge, adding absolute ethyl alcohol, centrifuging the precipitate at 7000rpm until the solution is neutral, finally filtering supernatant, and drying the precipitate to obtain a black Ti 3C2Tx sample; S2, final synthesis 80ML of deionized water is taken and placed in a beaker, 1g of Ti 3C2Tx material is added and placed in an ultrasonic machine for ultrasonic dispersion for 15-30min, then a proper amount of tetrabutyl titanate and 40mL of absolute ethyl alcohol are measured and added into the beaker, and stirring is carried out for 4-7h under the magnetic stirring condition. And then placing the obtained solution into a high-pressure reaction kettle with a polytetrafluoroethylene lining, compounding T i 3C2Tx materials with TiO 2 by a hydrothermal method, placing a black precipitation part in the solution into a centrifuge after synthesis, washing with deionized water for three times at 3000rpm, washing with ethanol for three times to remove impurities in the precipitate, and finally placing the washed product into a vacuum drying oven at 60-100 ℃ for drying for 12-24 hours to obtain the TiO 2 @MXene composite material with the weight of between 10 and 40 percent. In the step S1, the specific operation of drying the precipitate is as follows, the precipitate is placed into a vacuum drying box and dried for 12-24 hours under the environmental condition of 60 ℃. In the step S2, the solution is reacted in a polytetrafluoroethylene hydrothermal reactor for 15-20h under the temperature condition of 160 ℃. Preferably, the removing device using the nanocomposite comprises an operation table, a bracket is fixedly connected to the right side of the top of the operation table, a mounting bracket is fixedly connected to the bracket, one end of the mounting bracket is rectangular and annular, a bracket is fixedly connected to the left side of the top of the operation table, a clamp is arranged on the bracket, a bracket is fixedly connected to one side of the clamp, a stirring blade is fixedly connected to one end of the bracket, a quartz cuvette is arranged in the rectangular ring at one end of the mounting bracket, a thermocouple is