Ag对TiO<sub>2</sub>@Ag/聚偏氟乙烯复合薄膜性能的影响

于翔; 董献辉; 桂久青; 张雪寅; 宋子豪; 李玥

doi:10.13801/j.cnki.fhclxb.20191128.001

Ag对TiO₂@Ag/聚偏氟乙烯复合薄膜性能的影响

doi: 10.13801/j.cnki.fhclxb.20191128.001

河南工程学院　材料与化学工程学院，郑州 450007

基金项目: 国家自然科学基金青年基金(51608175)；河南省科技厅科技攻关项目(182102310866)

详细信息

通讯作者:
于翔，博士，副教授，硕士生导师，研究方向为光催化、高分子纳米材料　E-mail：yxpolymer@sina.com

中图分类号: TB333；O643
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出版历程
- 收稿日期: 2019-08-04
- 录用日期: 2019-11-16
- 网络出版日期: 2019-11-28
- 刊出日期: 2020-07-15

Effect of Ag on properties of TiO₂@Ag/polyvinylidene fluoride composite membranes

Department of Material and Chemical Engineering, Henan University of Engineering, Zhengzhou 450007, China

摘要

摘要: 采用光化学沉积法和溶液刮膜法制备不同Ag含量的TiO₂@Ag/聚偏氟乙烯(PVDF)复合薄膜，并采用电子万能材料试验机、紫外可见近红外分光光度计和XRD等对TiO₂@Ag/PVDF复合薄膜的物理性能和光催化性能进行表征和分析。研究发现：与TiO₂/PVDF复合薄膜相比，TiO₂@Ag/PVDF复合薄膜的拉伸强度明显提高，但断裂伸长降低，且复合薄膜的响应光谱范围拓宽至可见光区；TiO₂@Ag/PVDF复合薄膜的光催化降解能力随Ag负载量的增加而呈先升高后降低的趋势；同时TiO₂@Ag/PVDF复合薄膜具有优异的重复利用性和可见光区自清洁作用。综上所述，实验所制备的TiO₂@Ag/PVDF复合薄膜能够满足实际应用需要，因此其在光催化降解领域具有潜在的应用前景。
- 聚偏氟乙烯(PVDF) /
- TiO₂@Ag /
- 光催化 /
- 自清洁 /
- 复合薄膜 /
- 降解
Abstract: The TiO₂@Ag/polyvinylidene fluoride(PVDF) composite membranes with different Ag contents were prepared by photochemical reduction deposition and solution scraping methods. The physical properties and photocatalytic properties of the TiO₂@Ag/PVDF composite membranes were analyzed by electronic universal material testing machine, UV-visible near-infrared spectrophotometer, XRD and so on. The results show that compared with pure TiO₂/PVDF composite membranes, the tensile strength of TiO₂@Ag/PVDF composite membranes is obviously increased but the breaking elongation is decreased, and TiO₂@Ag/PVDF composite membranes can promote the response spectral range of TiO₂ to visible region. Furthermore, the photocatalytic degradation abilities of the TiO₂@Ag/PVDF composite membranes increase at first and then decrease with the increase of loaded Ag. Moreover, the TiO₂@Ag/PVDF composite membranes have excellent reusability and self-cleaning effect in visible right. Above all, the TiO₂@Ag/PVDF composite membranes prepared by the experiment can satisfy the needs of practical applications. The TiO₂@Ag/PVDF composite membranes loaded with Ag have a significant potential foreground in photocatalytic degradation field.
- polyvinylidene fluoride(PVDF) /
- TiO₂@Ag /
- photocatalytic /
- self-cleaning /
- composite membranes /
- degradation

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图 1 TiO₂/PVDF和TiO₂@Ag/PVDF复合薄膜的应力-应变曲线

Figure 1. Stress-strain curves of TiO₂/PVDFand TiO₂@Ag/PVDF composite membranes

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图 2 TiO₂@Ag/PVDF-0.3复合薄膜在不同取向方向的的应力-应变曲线

Figure 2. Stress-strain curves of TiO₂@Ag/PVDF-0.3 composite membranes in different directions

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图 3 TiO₂/PVDF和TiO₂@Ag/PVDF复合薄膜的XRD图谱

Figure 3. XRD pattarns of TiO₂/PVDF and TiO₂@Ag/PVDF composite membranes

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图 4 TiO₂/PVDF和TiO₂@Ag/PVDF复合薄膜的紫外-可见吸收光图谱

Figure 4. UV-visible absorption spectra of TiO₂/PVDF and TiO₂@Ag/PVDF composite membranes

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图 5 TiO₂/PVDF和TiO₂@Ag/PVDF复合薄膜的光催化降解曲线

Figure 5. Photocatalytic degradation curves of TiO₂/PVDF and TiO₂@Ag/PVDF composite membranes

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图 6 TiO₂@Ag/PVDF-0.03/3复合薄膜的循环使用光催化降解曲线

Figure 6. Cyclic photocatalytic degradation curves of TiO₂@Ag/ PVDF-0.03/3 composite membranes

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图 7 TiO₂@Ag/PVDF-0.03/3复合薄膜在自然光下的自清洁过程

Figure 7. Self-cleaning process of TiO₂@Ag/PVDF-0.03/3 composite membranes under natural ligh

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表 1 前负载Ag的TiO₂@Ag/聚偏氟乙烯(PVDF)复合薄膜的具体组成

Table 1. Specific compositions of TiO₂@Ag/polyvinylidene fluoride(PVDF) composite membranes with front-loaded Ag

Sample	PVDF/g	PVP/g	TiO₂@Ag/g	DMAc/mL
TiO₂@Ag/PVDF-0.3	5.0	2.5	0.5	30
TiO₂@Ag/PVDF-0.03	5.0	2.5	0.5	30

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表 2 后负载Ag的TiO₂@Ag/PVDF复合薄膜的制备参数

Table 2. Preparation parameters of TiO₂@Ag/PVDF composite membranes with after-loaded Ag

Sample	AgNO₃/(mmol·L⁻¹)	Light time/min
TiO₂@Ag/PVDF-0.3/1	0.3	1
TiO₂@Ag/PVDF-0.3/2	0.3	2
TiO₂@Ag/PVDF-0.3/3	0.3	3
TiO₂@Ag/PVDF-0.03/1	0.03	1
TiO₂@Ag/PVDF-0.03/2	0.03	2
TiO₂@Ag/PVDF-0.03/3	0.03	3

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