Polydopamine nanolayer assisted internal photo-deposition of CdS nanocrystals for stable cosensitized photoanode

Li，Na1; Han，Lu1; Zhang，Hainan1; Huang，Juntong2; Luo，Xudong1; Li，Xibao2; Wang，Yuanhao3; Qian，Weiqi4; Yang，Ya4

2022

10.1007/s12274-022-4588-8

Nano Research   影响因子和分区

1998-0124

1998-0000

Hydrogen evolution via photo-electro-chemical (PEC) co-catalysis is potential for solving energy crisis and environmental issues. The rapidly advances of fabrication and broad applications of polydopamine (PDA) and its derivatives have drawn intense attentions in recent years. Herein, an ultrathin PDA coating with nanometer accuracy was conformally grown on TiO nanotube arrays (NTAs) via electrochemical polymerization, in which the polymer provided a platform for further photoinduced assembly of CdS nanocrystals in the embedded mode. The optimized CdS@PDA/TiO NTAs hierarchical heterostructure as photoanode gave an excellent PEC performance and exhibited outstanding stability under light irradiation. The photocurrent density was heightened to 5.48 mA·cm, which was beneficial to H evolution with a rate of 20 µmol·h·cm. The improvement of PEC activity was ascribed to co-photosensitization, optimized carriers transfer, and transport route arised from CdS embedding, resulting to provide a persistent driving force for charge separation based on secure heterojunction of CdS/TiO glued by PDA. The improvement of PEC stability was due to the inhibition of CdS photocorrosion covered by PDA shelter. This advance boded well for the development of PEC field founded on multifunctional PDA. [Figure not available: see fulltext.]

photoelectrocatalysis photocorrosion ABSTRACT polydopamine TiO2 nanotube arrays

SCI ; EI

英语

通讯

WOS:000823229400004

20222812336382

Energy policy ; Heterojunctions ; II-VI semiconductors ; Nanocrystals ; Nanotubes ; Titanium dioxide

Energy Policy:525.6 ; Semiconducting Materials:712.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Nanotechnology:761 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2 ; Crystalline Solids:933.1

2-s2.0-85133564131

Scopus

1.School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan,114051,China
2.School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang,330063,China
3.SUSTech Engineering Innovation Center,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
4.CAS Center for Excellence in Nanoscience,Beijing Key Laboratory of Micro-nano Energy and Sensor,Beijing Institute of Nanoenergy and Nanosystems,Chinese Academy of Sciences,Beijing,101400,China

Li，Na,Han，Lu,Zhang，Hainan,et al. Polydopamine nanolayer assisted internal photo-deposition of CdS nanocrystals for stable cosensitized photoanode[J]. Nano Research,2022.

Li，Na.,Han，Lu.,Zhang，Hainan.,Huang，Juntong.,Luo，Xudong.,...&Yang，Ya.(2022).Polydopamine nanolayer assisted internal photo-deposition of CdS nanocrystals for stable cosensitized photoanode.Nano Research.

Li，Na,et al."Polydopamine nanolayer assisted internal photo-deposition of CdS nanocrystals for stable cosensitized photoanode".Nano Research (2022).