One-Pot Synthesis of One-Dimensional Multijunction Semiconductor Nanochains from Cu 1.94 S, CdS, and ZnS for Photocatalytic Hydrogen Generation.

Autor:	Nwaji N; International Academy of Optoelectronics at Zhaoqing, South China Normal University, Liyuan Street, 526238 Guangdong, China., Akinoglu EM; International Academy of Optoelectronics at Zhaoqing, South China Normal University, Liyuan Street, 526238 Guangdong, China.; ARC Centre of Excellence in Exciton Science, School of Chemistry, University of Melbourne, Parkville, VIC 3010, Australia., Lin B; International Academy of Optoelectronics at Zhaoqing, South China Normal University, Liyuan Street, 526238 Guangdong, China.; National Center for International Research on Green Optoelectronics, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China., Wang X; International Academy of Optoelectronics at Zhaoqing, South China Normal University, Liyuan Street, 526238 Guangdong, China.; National Center for International Research on Green Optoelectronics, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China., Giersig M; International Academy of Optoelectronics at Zhaoqing, South China Normal University, Liyuan Street, 526238 Guangdong, China.; Institute of Fundamental Technological Research, Polish Academy of Sciences, 02-106 Warsaw, Poland.
Jazyk:	angličtina
Zdroj:	ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2021 Dec 15; Vol. 13 (49), pp. 58630-58639. Date of Electronic Publication: 2021 Dec 06.
DOI:	10.1021/acsami.1c18020
Abstrakt:	Chains of alternating semiconductor nanocrystals are complex nanostructures that can offer control over photogenerated charge carriers dynamics and quantized electronic states. We develop a simple one-pot colloidal synthesis of complex Cu 1.94 S-CdS and Cu 1.94 S-ZnS nanochains exploiting an equilibrium driving ion exchange mechanism. The chain length of the heterostructures can be tuned using a concentration dependent cation exchange mechanism controlled by the precursor concentrations, which enables the synthesis of monodisperse and uniform Cu 1.94 S-CdS-Cu 1.94 S nanochains featuring three epitaxial junctions. These seamless junctions enable efficient separation of photogenerated charge carriers, which can be harvested for photocatalytic applications. We demonstrate the superior photocatalytic activity of these noble metal free materials through solar hydrogen generation at a hydrogen evolution rate of 22.01 mmol g -1 h -1 , which is 1.5-fold that of Pt/CdS heterostructure photocatalyst particles.
Databáze:	MEDLINE
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