期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 214, 期 -, 页码 507-515出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2018.04.053
关键词
Electrospinning; In-situ polymerization; Atomic layer deposition; Nanofiber; Photocatalysis
资金
- National Natural Science Foundation of China [51572045, 51272041, 61201107, 11604044, 91233204]
- National Basic Research Program of China (973 Program) [2012CB933703]
- 111 Project [B13013]
- Natural Science Foundation of Jilin Province of China [20160101313JC]
- Fundamental Research Funds for the Central Universities [2412017FZ009, 2412017QD007, 2412016KJ017]
- China Postdoctoral Science Foundation [2017M610188]
Polyaniline (PANI) particles were immobilized on electrospun polyacrylonitrile (PAN) nanofibers (NFs) to form PAN@PANI NFs via in situ polymerization at room temperature. Then, ZnO was deposited on the surface of PAN@PANI NFs by atomic layer deposition (ALD) to form PAN@PANI@ZnO NFs. The PANI and ZnO contents were well controlled by adjusting the polymerization time and the number of ALD cycles, respectively. The obtained PAN@PANI@ZnO NFs exhibited higher photocatalytic activity for the degradation of methylene blue under ultraviolet light irradiation than PAN@PANI and PAN@ZnO NFs, and the first-order degradation rate constant (k(app)) of PAN@PANI@ZnO NFs formed with 400 ALD cycles was greater than that of PAN@ZnO NFs formed with 400 ALD cycles by a factor of 2.1. The enhanced photocatalytic activity is shown to originate from the improved charge separation of photogenerated electrons and holes due to the formation of ZnO/PANI heterojunctions in PAN@PANI@ZnO NFs. The obtained PAN@PANI@ZnO photocatalysts are easily recycled with little decrease in photocatalytic activity because of their macroscopic mat structure and flexibility. (C) 2018 Published by Elsevier B.V.
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