A comparative photophysical and photoelectrochemical study of undoped and 2-aminothiophene-3-carbonitrile-doped carbon nitride

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Title: A comparative photophysical and photoelectrochemical study of undoped and 2-aminothiophene-3-carbonitrile-doped carbon nitride
Authors: Díaz-García, Ana Korina | Díez García, María Isabel | Lana-Villarreal, Teresa | Gómez, Roberto
Research Group/s: Grupo de Fotoquímica y Electroquímica de Semiconductores (GFES)
Center, Department or Service: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica
Keywords: Carbon nitride | Molecular doping | Photoelectrochemistry | Hydrogen generation | Photoluminescence
Knowledge Area: Química Física
Issue Date: 20-Nov-2016
Publisher: Elsevier
Citation: Electrochimica Acta. 2016, 219: 453-462. doi:10.1016/j.electacta.2016.10.021
Abstract: Introducing molecular dopants in carbon nitride has been shown to dramatically modify its electronic structure, resulting in efficient charge separation and improved photocatalytic efficiency. Herein, we have studied the effect of doping carbon nitride with 2-aminothiophene-3-carbonitrile. A fundamental photoelectrochemical characterization has been performed comparing the behavior of the resulting material (ATCN) with undoped carbon nitride (CN). On the one hand, it is shown that the photocurrent onset shifts with the pH up to a value of 8 for both materials, as expected theoretically. On the other, ATCN, which benefits from additional light absorption, shows an improved photoactivity toward hydrogen evolution. In addition, it displays intriguing photoluminescence properties that can be additionally engineered by modulating the potential. In a more general vein, this study illustrates how to shed light on the effects of introducing molecular dopants in the CN matrix.
Sponsor: We are grateful to the Spanish Ministry of Education and Competitiveness for financial support through projects MAT2012-37676 and MAT2015-71727-R (co-financed with FEDER funds by the European Union). A.-K.D.G. thanks the Mexican government (CONACYT) for the award of a doctoral grant.
URI: http://hdl.handle.net/10045/59028
ISSN: 0013-4686 (Print) | 1873-3859 (Online)
DOI: 10.1016/j.electacta.2016.10.021
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2016 Elsevier Ltd.
Peer Review: si
Publisher version: http://dx.doi.org/10.1016/j.electacta.2016.10.021
Appears in Collections:INV - GFES - Artículos de Revistas

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