CdS/ZnS-PVDF/PSF光催化膜的制备及其刚果红降解性能研究
Preparation of CdS/ZnS-PVDF/PSF Photocatalytic Membrane and Its Degradation Performance of Congo Red
伊鲁东 1王浩 1张宇 1张本贵 1谢英鹏 1温远光 2刘晨 2王志煜2
作者信息
- 1. 沈阳化工大学化学工程学院,辽宁 沈阳 110142
- 2. 沈阳飞机工业(集团)有限公司,辽宁 沈阳 110850
- 折叠
摘要
光催化膜分离耦合技术处理废水是水处理研究方向之一,它是将膜分离技术与光催化技术结合,有效地解决了催化剂回收难的问题,同时也缓解了膜污染问题.利用水热法制备了 CdS 和CdS/ZnS光催化剂,用相转化法分别制备出聚偏氟乙烯/聚砜(PVDF/PSF)膜,以及CdS和CdS/ZnS光催化剂嵌入其中的CdS-PVDF/PSF光催化膜和CdS/ZnS-PVDF/PSF光催化膜.将刚果红溶液作为污染物,氙灯作为光源,分别对这 3 种膜的膜通量、截留率和刚果红降解率进行测试比较和分析.结果表明:反应进行360 min后,CdS/ZnS-PVDF/PSF光催化膜的膜通量能够达到63.0 L·h-1·m2,相比PVDF/PSF膜(36.0 L·h-1·m2)和CdS-PVDF/PSF光催化膜(52.1 L·h-1·m2)的膜通量有显著增加,说明CdS/ZnS的负载有效缓解了 PVDF/PSF 膜的膜通量由于刚果红分子堵塞孔道引起的衰减.在膜通量增加的同时,CdS/ZnS-PVDF/PSF光催化膜的截留率在 360 min后依然保持在 100%.CdS/ZnS-PVDF/PSF光催化膜对刚果红的降解率可以达到86.9%,分别比使用PVDF/PSF膜和CdS-PVDF/PSF光催化膜提高了18.1%和6.2%.CdS/ZnS-PVDF/PSF光催化膜能够获得最高的膜通量和降解率,因此用于降解废水中的有机污染物具有很好的应用前景.
Abstract
Photocatalytic membrane separation coupled technology for wastewater treatment is one of the research directions in water treatment.Photocatalytic membrane technology is a combination of membrane separation technology and photocatalytic technology,which effectively solves the problem of difficult photocatalyst recovery and also alleviates the problem of membrane pollution.CdS and CdS/ZnS photocatalysts were prepared by hydrothermal method,and polyvinylidene fluoride/polysulfone(PVDF/PSF)membrane,CdS-PVDF/PSF photocatalytic membrane and CdS/ZnS-PVDF/PSF photocatalytic membrane were prepared by using the phase conversion method.Congo red was used as a pollutant,and xenon lamp was used as a light source.The membrane flux,rejection and degradation ratios of Congo red by using these three membranes were tested,compared and analyzed.The results showed that the membrane flux of CdS/ZnS-PVDF/PSF photocatalytic membrane could reach 63.0 L·h-1·m2 for 360 min,which was significantly increased compared to 36.0 L·h-1·m2 of PVDF/PSF membrane and 52.1 L·h-1·m2 of CdS-PVDF/PSF photocatalytic membrane,indicating that the loading of CdS/ZnS effectively alleviated the attenuation of PVDF/PSF membrane flux due to Congo red molecules blocking the pore.While the membrane flux increased,the rejection of Congo red by using the CdS/ZnS-PVDF/PSF photocatalytic membrane remained at 100%after 360 min.The degradation ratio of Congo red by using CdS/ZnS-PVDF/PSF photocatalytic membrane reached 86.9%after 360 min,which was 18.1%and 6.2%higher than that by using PVDF/PSF membrane and CdS-PVDF/PSF photocatalytic membrane,respectively.The CdS/ZnS-PVDF/PSF photocatalytic membrane can achieve the highest membrane flux and degradation ratio,which has a good application prospect for the degradation of organic pollutants in wastewater.
关键词
光催化膜/CdS/ZnS光催化剂/聚偏氟乙烯/聚砜Key words
Photocatalytic membrane/CdS/ZnS photocatalyst/Polyvinylidene fluorider/Polysulfone引用本文复制引用
基金项目
辽宁省"兴辽英才计划"青年拔尖人才项目(XLYC2007193)
辽宁省自然科学基金联合基金计划(2021NLTS1210)
大连理工大学精细化工国家重点实验室开放基金项目(KF1708)
辽宁省科技厅省博士科研启动基金计划项目(2022-BS-212)
出版年
2024
NETL
NSTL
万方数据