Flowing water enabled piezoelectric potential of flexible composite film for enhanced photocatalytic performance

被引：64
作者：
Dai, Baoying [1 ,2 ,3 ]
Huang, Hengming [1 ,2 ,3 ,4 ,5 ]
Wang, Fulei [6 ]
Lu, Chunhua [1 ,2 ,3 ]
Kou, Jiahui [1 ,2 ,3 ]
Wang, Lianzhou [4 ,5 ]
Xu, Zhongzi [1 ,2 ,3 ]
机构：
[1] Nanjing Tech Univ, Coll Mat Sci & Engn, State Key Lab Mat Oriented Chem Engn, Nanjing 210009, Jiangsu, Peoples R China
[2] Nanjing Tech Univ, Jiangsu Collaborat Innovat Ctr Adv Inorgan Funct, Nanjing 210009, Jiangsu, Peoples R China
[3] Nanjing Tech Univ, Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, Nanjing 210009, Jiangsu, Peoples R China
[4] Univ Queensland, Sch Chem Engn, Nanomat Ctr, Brisbane, Qld 4072, Australia
[5] Univ Queensland, Australian Inst Bioengn & Nanotechnol, Brisbane, Qld 4072, Australia
[6] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Shandong, Peoples R China
来源：
CHEMICAL ENGINEERING JOURNAL | 2018年 / 347卷
基金：
中国国家自然科学基金;
关键词：
Photocatalysis; Flowing water; Piezoelectric potential; PVDF; BiOCl0.5Br0.5; DEGRADATION; ENERGY; TETRACYCLINE; PVDF; NANOGENERATOR; DECOMPOSITION; EFFICIENCY;
D O I：
10.1016/j.cej.2018.04.008
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Fast charge transfer and low recombination rate are two vital requirements to achieve high photocatalytic activity. In this work, we report the conversion of flowing water energy to piezoelectric potential on a new type of flexible composite film PVDF-Na0.5Bi0.5TiO3-BiOCl0.5Br0.5 (PV-N-B) containing PVDF-Na0.5Bi0.5TiO3 (PV-N) substrate and BiOCl0.5Br0.5, which significantly boosts the charge transfer of the photocatalytic composite film, resulting in improved photocatalytic capability by 2.33 times. The role of piezoelectric potential in photocatalysis process has been discussed in detail and the results reveal that higher potential output is more beneficial for photocatalytic performance enhancement. Moreover, the photocatalytic degradation intermediates of tetracycline (TC) over PV-N-B were detected by liquid chromatography-mass spectrometer and the possible photodegradation pathway of TC has been reasonably proposed. It is verified that superoxide radicals are the main active species for PV-N-B to degrade TC. The durability experiments demonstrate the good stability of flexible composite film PV-N-B. In a wider perspective, this work provides an efficient flexible composite film,
引用
收藏
页码：263 / 272
页数：10
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