Preparation method and application of cuprous oxide/ZIF-8 heterojunction photocatalytic antibacterial material with visible light response

A ZIF-8, antibacterial material technology, applied in the field of preparation of visible light catalyzed antibacterial material cuprous oxide/ZIF-8 heterojunction, can solve the problems of poor stability of antibacterial materials, inability to achieve recycling, limited antibacterial ability, etc. , to achieve the effect of low cost, inhibition of photocorrosion and enhanced stability

Pending Publication Date: 2022-05-13
中国人民解放军联勤保障部队第九八九医院 +1
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  • Application Information

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Problems solved by technology

The dissolution of ions and 2-methylimidazole makes the stability of the antibacterial material worse, the service life is limited, and it cannot be recycled; in addition, the dissolved ions and 2-methylimidazole need to reach a certain concentration to sterilize, and the antibacterial ability is limited

Method used

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  • Preparation method and application of cuprous oxide/ZIF-8 heterojunction photocatalytic antibacterial material with visible light response
  • Preparation method and application of cuprous oxide/ZIF-8 heterojunction photocatalytic antibacterial material with visible light response
  • Preparation method and application of cuprous oxide/ZIF-8 heterojunction photocatalytic antibacterial material with visible light response

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preparation example Construction

[0033] A kind of visible light catalytic Cu of the present invention 2 The preparation method of O / ZIF-8 heterojunction antibacterial material comprises the following steps:

[0034] Based on the in-situ synthesis method, add ZIF-8, copper salt and surfactant to the solvent, mix well to obtain a mixed solution, then add NaOH aqueous solution and reducing agent aqueous solution, stir at 25-80°C for 15-90min, and collect by centrifugation Precipitate and dry at 40-100°C for 12-24h to obtain visible light-catalyzed Cu 2 O / ZIF-8 heterojunction antibacterial material.

[0035] Wherein, the ZIF-8 size is 500-800nm, and the concentration range of ZIF-8 in the mixed solution is 0.01-0.05molL -1 .

[0036] The copper salt is one of copper chloride dihydrate, copper nitrate trihydrate, copper sulfate pentahydrate and copper acetate monohydrate, and the concentration range of the copper salt in the mixed solution is 0.005-0.03mol L -1 .

[0037] The surfactant is one of polyvinylpyr...

Embodiment 1

[0043] A Visible Light Catalytic Antibacterial Material Cu 2 The preparation method of O / ZIF-8 heterojunction comprises the following steps:

[0044] The size is 500-800nm ​​ZIF-8, copper chloride dihydrate, cetyltrimethylammonium bromide are added to the mixed solvent of deionized water and methanol (v 水 :v 甲醇 =1:1), the concentration of ZIF-8 obtained is 0.01mol L -1 , copper chloride dihydrate is 0.005mol L -1 , cetyltrimethylammonium bromide is 0.01g mL -1 100mL of the mixed solution was stirred at 25°C for 15min, dispersed evenly, and 10mL of 2mol L -1 NaOH aqueous solution and 10mL 0.5mol L -1 Hydrazine hydrate aqueous solution, centrifuged to collect the precipitate after 30 minutes, dried at 40°C for 24 hours to obtain Cu 2 O / ZIF-8 heterojunction.

[0045] Cu 2 The SEM image of the O / ZIF-8 heterojunction and the corresponding element mapping are as follows figure 1 shown. figure 2 Under visible light irradiation, ZIF-8, Cu prepared in Example 1 of the presen...

Embodiment 2

[0047] A Visible Light Catalytic Antibacterial Material Cu 2 The preparation method of O / ZIF-8 heterojunction comprises the following steps:

[0048] The size is 500-800nm ​​ZIF-8, copper nitrate trihydrate, sodium lauryl sulfate are added to the mixed solution of deionized water and ethanol (v 水 :v 乙醇 =1:1), the concentration of ZIF-8 obtained is 0.03mol L -1 , copper nitrate trihydrate is 0.01mol L -1 , sodium lauryl sulfate is 0.03g mL -1 100mL of the mixed solution was stirred and dispersed at 50°C for 60min, and 10mL of 1mol L -1 NaOH and 15ml 0.6mol L -1 Ascorbic acid aqueous solution, centrifuged to collect the precipitate after 45min, dried at 80°C for 12h to obtain Cu 2 O / ZIF-8 heterojunction.

[0049] Synthesized ZIF-8, Cu 2 O and Cu 2 The XRD pattern of O / ZIF-8 heterojunction is as follows image 3 shown. Figure 4 Under the irradiation of visible light, the ZIF-8 and Cu prepared in Example 2 of the present invention 2 O and Cu 2 After O / ZIF-8 heterojun...

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Abstract

The invention discloses a preparation method and application of a visible light catalysis antibacterial material cuprous oxide/ZIF-8 heterojunction, ZIF-8 is taken as a substrate, Cu2O is loaded on the surface of the ZIF-8 in situ by adding copper salt, a surfactant, sodium hydroxide, a reducing agent and the like, and the Cu2O/ZIF-8 heterojunction photocatalysis antibacterial material with the Cu2O coating the ZIF-8 is constructed. The construction of the Cu2O/ZIF-8 heterojunction stabilizes the structures of ZIF-8 and Cu2O on one hand, and promotes the generation of ROS (reactive oxygen species) through heterojunction interface electron migration under the excitation of indoor visible light on the other hand, so that microorganisms such as bacteria and the like die quickly. An antibacterial test shows that the sterilizing rate of the low-concentration Cu2O/ZIF-8 heterojunction (5 [mu] g mL <-1 >) on escherichia coli can reach 99% or above in 15 min under a fluorescent lamp (fluorescent lamp, 13W) with weak light intensity.

Description

technical field [0001] The invention belongs to the field of photocatalytic antibacterial materials, in particular to a preparation method and application of a visible light catalytic antibacterial material cuprous oxide / ZIF-8 heterojunction. Background technique [0002] Microorganisms such as bacteria, fungi, and viruses in the air can cause various diseases, such as various respiratory infectious diseases, asthma, etc., and have become one of the most serious problems threatening public health. Conventional air disinfection techniques, including chemical spray inactivation and ultraviolet irradiation inactivation, have some outstanding problems that limit their further development and practical application. Photocatalytic technology generates strong oxidative reactive oxygen species (ROS) on the surface of the catalyst under light, such as hydroxyl radicals ( OH), superoxide radicals ( O 2 - ), singlet oxygen ( 1 o 2 ) and hydrogen peroxide (H 2 o 2 ), destroy the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/28A01N59/20A01N59/16A01P3/00A01P1/00
CPCB01J31/28B01J35/004A01N59/20A01N59/16
Inventor 李俊堂黄宇毛正祥雷曼马坤鹏曲云峰王鹏鸽朱小闪
Owner 中国人民解放军联勤保障部队第九八九医院
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