Molecular modulation of fluorene-dibenzothiophene-S,S-dioxide-based conjugated polymers for enhanced photoelectrochemical water oxidation under visible light†,Materials Chemistry Frontiers

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Molecular modulation of fluorene-dibenzothiophene-S,S-dioxide-based conjugated polymers for enhanced photoelectrochemical water oxidation under visible light†
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2018-08-30 00:00:00 , DOI: 10.1039/c8qm00275d
Chunhui Dai _{1,

2,

3,

4,

5} , Xuezhong Gong _{5,

6,

7,

8} , Xianglin Zhu _{5,

6,

7,

8} , Can Xue _{5,

6,

7,

8} , Bin Liu _{1,

2,

3,

4,

5}

Affiliation

Three conjugated polymers (CPs) bearing a common fluorene-dibenzothiophene-S,S-dioxide backbone were designed and synthesized for photoelectrochemical (PEC) water oxidation upon visible-light irradiation (>420 nm). Without the assistance of additional sacrificial agents or co-catalysts, a good photocurrent response of 4.1 μA cm⁻² at +0.6 V (vs. Ag/AgCl) was achieved through facile molecular modulation of the polymer, which improved the uniformity and crystallinity of the film and facilitated charge transport among polymer chains. Moreover, C12 was used for preparation of a composite film with TiO₂ nanorod arrays via spin-coating to yield an approximately 11-fold higher anodic PEC activity than that of pure TiO₂. Our results demonstrated the great potential of solution-processable conjugated polymers for facile construction of highly efficient PEC devices for water splitting.

中文翻译：

芴-二苯并噻吩-S，S-二氧化物基共轭聚合物的分子调制，可在可见光下增强光电化学水氧化作用†

设计并合成了三种带有常见芴-二苯并噻吩-S，S-二氧化物主链的共轭聚合物（CP），用于可见光（> 420 nm）的光电化学（PEC）水氧化。无需额外的牺牲剂或助催化剂的帮助，通过聚合物的简便分子调节，在+0.6 V（相对于Ag / AgCl）下获得了4.1μAcm ^-2的良好光电流响应，从而改善了聚合物的均匀性和结晶度。薄膜并促进聚合物链之间的电荷传输。此外，C12被用于制备有TiO复合膜的_2个纳米棒阵列经由旋涂可产生比纯TiO ₂高约11倍的阳极PEC活性。我们的结果证明了可溶液加工的共轭聚合物在轻松构建高效PEC装置中用于水分解的巨大潜力。

更新日期：2018-08-30

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