Ag6Si2O7-TiO2/PP复合光催化材料的制备及其抗菌性能

樊婷玥; 任煜; 赵紫瑶; 莫慧琳; 李美贤

doi:10.13801/j.cnki.fhclxb.20211018.005

Ag₆Si₂O₇-TiO₂/PP复合光催化材料的制备及其抗菌性能

doi: 10.13801/j.cnki.fhclxb.20211018.005

南通大学　纺织服装学院，南通 226019

基金项目: 南通市科技项目(JC2021039)

详细信息

通讯作者:
任煜，博士，教授，硕士生导师，研究方向为纤维材料的功能化改性　E-mail：ren.y@ntu.edu.cn

中图分类号: TB333
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- 被引次数: 0
出版历程
- 收稿日期: 2021-07-30
- 修回日期: 2021-09-20
- 录用日期: 2021-10-01
- 网络出版日期: 2021-10-19
- 刊出日期: 2022-08-31

Preparation and antibacterial properties of Ag₆Si₂O₇-TiO₂/PP composite photocatalytic material

School of Textile and Clothing, Nantong University, Nantong 226019, China

摘要

摘要: 为了研究改性TiO₂在聚丙烯(PP)材料表面的光催化抗菌性能，本文通过原位沉积法制备出焦硅酸银-二氧化钛(Ag₆Si₂O₇-TiO₂)光催化剂，采用硅烷偶联剂KH-560对PP非织造材料进行预处理，再使用浸渍法将光催化剂负载到PP非织造材料的表面。通过SEM、XRD、XPS、UV-vis和光致发光光谱(PL)对材料的晶相结构、表面形态及化学组成等进行表征。结果表明，成功制备出Ag₆Si₂O₇-TiO₂/PP复合光催化材料，其中Ag₆Si₂O₇的质量分数为1wt%，负载PP非织造材料浓度为2 g/L。为研究Ag₆Si₂O₇-TiO₂/PP光催化降解染料性能，以甲基橙溶液作为降解物，以300 W氙灯作为光源对Ag₆Si₂O₇-TiO₂/PP处理120 min，结果其降解率达到95.6%。为研究Ag₆Si₂O₇-TiO₂/PP抗菌性能，对比了Ag₆Si₂O₇-TiO₂/PP在可见光和无光条件下对金黄色葡萄球菌和大肠杆菌的抑菌效果，结果显示其在可见光下对两种细菌抑菌率均达到99.99%以上。
- TiO₂ /
- Ag₆Si₂O₇ /
- 光催化 /
- 抗菌 /
- PP /
- 非织造材料
Abstract: To study the photocatalytic and antibacterial properties of modified TiO₂ on the surface of polypropylene (PP), silver pyrosilicate-titanium dioxide (Ag₆Si₂O₇-TiO₂) photocatalyst material was prepared by in-situ deposition, and it was loaded on the surface of PP nonwovens material which pretreat by silane coupling agent through impregnation method. The crystal structure, surface morphology and chemical composition were characterized by SEM, XRD, XPS, UV-vis and photoluminescence spectroscopy (PL). The results show that Ag₆Si₂O₇-TiO₂/PP composite photocatalytic material is successfully prepared, in which the mass fraction of Ag₆Si₂O₇ is 1wt% and the concentration of loaded PP nonwovens is 2 g/L. In order to characterize the photocatalytic degradation of dyes by Ag₆Si₂O₇-TiO₂/PP, the methyl orange solution are used as degradation substance, Ag₆Si₂O₇-TiO₂/PP is treated under xenon lamp light with 300 W for 120 min, and the degradation rate reach 95.6%. In order to characterize the antibacterial properties of Ag₆Si₂O₇-TiO₂/PP, the antibacterial effects of Ag₆Si₂O₇-TiO₂/PP on Staphylococcus aureus and Escherichia coli under visible light and no light are contrasted. The results show that the bacteriosta-tic rates of Ag₆Si₂O₇-TiO₂/PP against both bacteria under visible light are more than 99.99%.
- TiO₂ /
- Ag₆Si₂O₇ /
- photocatalysis /
- antibacterial /
- PP /
- nonwovens

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图 1 聚丙烯(PP) (a)、TiO₂/PP (b) 与Ag₆Si₂O₇-TiO₂/PP (c) 的SEM图像

Figure 1. SEM images of polypropylene (PP) (a), TiO₂/PP (b) and Ag₆Si₂O₇-TiO₂/PP (c)

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图 2 PP与Ag₆Si₂O₇-TiO₂/PP的XRD图谱

Figure 2. XRD patterns of PP and Ag₆Si₂O₇-TiO₂/PP

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图 3 Ag₆Si₂O₇-TiO₂/PP 的XPS图谱：(a) 全谱；(b) Ti2p；(c) Ag3d；(d) Si2p；(e) O1s

Figure 3. XPS spectra of Ag₆Si₂O₇-TiO₂/PP: (a) Overall; (b) Ti2p; (c) Ag3d; (d) Si2p; (e) O1s

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图 4 PP与Ag₆Si₂O₇-TiO₂/PP的荧光光谱图谱

Figure 4. Photoluminescence spectra of PP and Ag₆Si₂O₇-TiO₂/PP

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图 5 PP、TiO₂/PP与Ag₆Si₂O₇-TiO₂/PP的紫外吸收光谱

Figure 5. UV absorption spectrum of PP, TiO₂/PP and Ag₆Si₂O₇-TiO₂/PP

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图 6 模拟可见光下TiO₂/PP和Ag₆Si₂O₇-TiO₂/PP对甲基橙的降解活性

Figure 6. Photocatalytic activity of TiO₂/PP and Ag₆Si₂O₇-TiO₂/PP under simulated visible light irradiation

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图 7 TiO₂/PP与Ag₆Si₂O₇-TiO₂/PP对金黄色葡萄球菌抑菌活性

Figure 7. Antibacterial activity of TiO₂/PP and Ag₆Si₂O₇-TiO₂/PP for Staphylococcus aureus

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图 8 TiO₂/PP与Ag₆Si₂O₇-TiO₂/PP对大肠杆菌抑菌活性

Figure 8. Antibacterial activity of TiO₂/PP and Ag₆Si₂O₇-TiO₂/PP for Escherichia coli

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表 1 TiO₂/PP与Ag₆Si₂O₇-TiO₂/PP对金黄色葡萄球菌的抑菌率

Table 1. Antibacterial rate of TiO₂/PP and Ag₆Si₂O₇-TiO₂/PP for Staphylococcus aureus

Sample	Visible light		Without light
Sample	C₁/(CFU·mL⁻¹)	Y₁/%	C₂/(CFU·mL⁻¹)	Y₂/%
Blank sample	5.63×10⁵	—	5.75×10⁵	—
TiO₂/PP	1.01×10⁵	82.06	1.85×10⁵	67.82
Ag₆Si₂O₇− TiO₂/PP	0	99.99	0.02×10⁴	99.97
Notes: C—Viable bacteria concentration; Y—Bacteriostatic rate.

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表 2 TiO₂/PP与Ag₆Si₂O₇-TiO₂/PP对大肠杆菌的抑菌率

Table 2. Antibacterial rate of TiO₂/PP and Ag₆Si₂O₇-TiO₂/PP for Escherichia coli

Sample	Visible light		Without light
Sample	C₃/(CFU·mL⁻¹)	Y₃/%	C₄/(CFU·mL⁻¹)	Y₄/%
Blank sample	2.35×10⁵	—	2.52×10⁵	—
TiO₂/PP	0.96×10⁵	59.15	1.24×10⁵	50.79
Ag₆Si₂O₇- TiO₂/PP	0	99.99	0.11×10³	99.96

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