Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (11): 179-186.doi: 10.13475/j.fzxb.20201004708

• Comprehensive Review • Previous Articles     Next Articles

Research progress of performance enhancement methods for electrospun nanofiber-based photocatalyst

ZHOU Yuanyuan1,2,3, ZHENG Yuming1,2, WU Xiaoqiong1,2, SHAO Zaidong1,2()   

  1. 1. Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, Fujian 361021, China
    2. Key Laboratory of Urban Pollutant Conversion, Chinese Academy of Sciences, Xiamen, Fujian 361021, China
    3. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2020-10-26 Revised:2021-04-25 Online:2021-11-15 Published:2021-11-29
  • Contact: SHAO Zaidong E-mail:zdshao@iue.ac.cn

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Abstract:

The traditional nano-powder photocatalyst is prone to agglomerate during use,easy to be drained away and difficult to separate and recover, further causing secondary pollution.Photocatalysis is an advanced oxidation technology that can efficiently use solar energy to degrade pollutants, and is environmental friendly. This paper briefly introduced the research progress and existing problems of the single-component electrospun nanofiber-based photocatalyst. Then on the basis of the existing problems, the methods for enhanced modification the performance of the electrospun nanofiber-based photocatalyst were summarized,including element doping, surface precious metal deposition, semiconductor recombination, dye sensitization and graft conjugated polymers. The synthesis methods, principles, advantages, disadvantages and improvement directions of various methods were summarized. It is proposed that further research should be carried out in the development of new photocatalytic materials with high specific surface area and high electron hole separation efficiency, as well as new photocatalysts with multi-functional synergy and high mechanical strength.

Key words: electrospinning, photocatalytic technology, nanofiber-based photocatalyst, pollutants degradation, compound modification

CLC Number: 

  • TB34

Fig.1

Schematic diagram of performance enhancement methods of electrospun nanofiber-based photocatalyst"

Tab.1

Principles,advantages,disadvantages and improvement directions of nanofiber-based photocatalyst performance enhancement methods"

性能增强方法 原理 优点 缺点 改进方向
元素掺杂 离子作为捕获中心,形成杂质能级,造成晶格缺陷 稳定性好 只能吸收较低波段的可见光,缺陷位置导致电子-空穴对向表面转移效率降低 优化元素掺杂种类及方式提高光吸收范围
表面贵金属负载 改变光催化剂表面性质和体系电子分布 操作简单,催化性能佳 贵金属被包埋导致吸光效率低,贵金属易脱落及分布不均匀 制备多孔纳米纤维提高暴露活性位点,结合不同工艺提高贵金属的牢固性
半导体复合 形成电位差,促进电子-空穴对的分离 方法简单,结构可控 难以同时兼具光生载流子有效的电荷分离和强氧化还原能力 设计匹配的异质结结构,减少光生载流子的迁移距离,保留其氧化还原能力
染料敏化 染料在可见光区域的强吸收效应 结构可调,合成简单,价格便宜 敏化剂脱附及敏化剂光降解 调整染料结构或添加辅助试剂
接枝共轭聚合物 调节光催化剂的内部电子结构,抑制光生电子-空穴对的复合 适用范围广,反应条件不受限 聚合物附着性差、易脱附 聚合物接枝适当的支链或功能性侧基
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