https://scholars.lib.ntu.edu.tw/handle/123456789/598127
標題: | Biaxially extended side-chain conjugation of benzodithiophene-based polymer dots for superior photocatalytic stability under visible-light irradiation | 作者: | Elewa A.M Jayakumar J Huang Y.-W Elsayed M.H Chang C.-L Ting L.-Y Lin W.-C Chueh C.-C Chou H.-H. CHU-CHEN CHUEH |
關鍵字: | Benzodithiophene;Biaxial side-chain conjugation;Hydrogen evolution;Photocatalysts;Polymer dots;Ascorbic acid;Hydrogen production;Irradiation;Light;Photocatalytic activity;Stability;5]thiadiazole;Hydrogen-evolution;Photo-catalytic;Photocatalytic activities;Photocatalytic hydrogen production;Side-chains;Visible-light irradiation;Conjugated polymers | 公開日期: | 2022 | 卷: | 10 | 期: | 1 | 來源出版物: | Journal of Environmental Chemical Engineering | 摘要: | Conjugated polymer dots (Pdots) based on a series of BDT-based polymers with varied biaxially extended side-chain conjugations were prepared and employed for photocatalytic hydrogen production under visible light irradiation from aqueous solutions. The BDT-based polymers consisted of a dithiophedifluorobenzo[c][1,2,5]thiadiazole (DFBT) moiety as the acceptor unit and a BDT unit with different biaxially extended side-chains, including a alkyl-monothienyl group (T), a linear alkyl-dithiophene (2T) group, a branched alkyl-terthiophene (3T) group, and a fused alkyl-benzotrithiophene (B3T) group. The as-prepared Pdots based on these four polymers (PBDT-T, PBDT-2T, PBDT-3T, and PBDT-B3T) showed varied photophysical and electrochemical properties along with distinctive photocatalytic activity and long-term stability. Among them, the PBDT-B3T Pdots were showed to deliver a high photocatalytic efficiency of 14.1 mmol g?1 h?1 and a superior photocatalytic stability over 375 h in the presence of Pt as cocatalyst and ascorbic acid as sacrificial electron donors. Our results revealed that varying the structures of the biaxially extended side-chains endows a great flexibility in the photocatalytic activity of the polymers and the biaxially-extended conjugated side-chains can be a promising design strategy for the conjugated polymer to enhance the photocatalytic activity and stability. ? 2021 Elsevier Ltd |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85120866945&doi=10.1016%2fj.jece.2021.106927&partnerID=40&md5=a08c134a4218cb454811422a5414c3de https://scholars.lib.ntu.edu.tw/handle/123456789/598127 |
ISSN: | 22133437 | DOI: | 10.1016/j.jece.2021.106927 |
顯示於: | 化學工程學系 |
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