Articles producció científica> Química Física i Inorgànica

Core-substituted naphthalenediimides anchored on BiVO4 for visible light-driven water splitting

  • Identification data

    Identifier: imarina:5131428
    Authors:
    Hernández SOttone CProto STolod KDíaz De Los Bernardos MSolé-Daura ACarbó JGodard CCastillón SRusso NSaracco GClaver C
    Abstract:
    In this work, a novel catalytic system for the sunlight-driven water splitting reaction, which exploits the photocatalytic ability of BiVO4 coupled to a new kind of noble-metal-free organic dye molecules, is proposed. Hence, mono- and di-substituted naphthalenediimides (NDIs) were designed to have different functional groups that provide to them both tunable optical properties and adjustable HOMO/LUMO levels, and were selectively prepared (starting from 1,4,5,8-naphthalenetetracarboxylic acid) achieving yields >69%. Smart anchoring groups (i.e. carboxylates or aromatic amines) were added to the dyes in order to allow them to covalently bond to acidic -OH groups present on the BiVO4 surface. An easy and low-cost room temperature dip-coating technique was used to dye-sensitize both BiVO4 powders and thin films. NMR, MS, FT-IR, TG, FESEM, XRD, XPS and optical analyses confirmed the successful organic synthetic routes and good dyes/BiVO4 linkages. Photochemical and photoelectrochemical water oxidation reaction tests, together with DFT calculations, demonstrated that a proper alignment of the semiconductor/NDI-based dye energy levels is fundamental for enhancing the photocatalyst performance through a Z-scheme mechanism. The ability of the NDI organic molecules to delocalize the electronic charges was also a key factor for minimizing recombination processes and achieving more than a ten-fold increase in the photocurrent density of a 6 cm2 BiVO4 photo-electrode. The here reported results open new perspectives for the utilization of this new series of core-substituted NDIs, which are able to improve the activity of photocatalysts for different sunlight-driven applications, e.g. waste water treatment and organic contaminants' degradation, other than the production of solar fuel
  • Others:

    Author, as appears in the article.: Hernández S; Ottone C; Proto S; Tolod K; Díaz De Los Bernardos M; Solé-Daura A; Carbó J; Godard C; Castillón S; Russo N; Saracco G; Claver C
    Department: Química Física i Inorgànica Química Analítica i Química Orgànica
    e-ISSN: 1463-9270
    URV's Author/s: Carbó Martin, Jorge Juan / Castillón Miranda, Sergio / Claver Cabrero, Maria del Carmen Orosia / Godard, Cyril
    Keywords: Clean water and sanitation
    Abstract: In this work, a novel catalytic system for the sunlight-driven water splitting reaction, which exploits the photocatalytic ability of BiVO4 coupled to a new kind of noble-metal-free organic dye molecules, is proposed. Hence, mono- and di-substituted naphthalenediimides (NDIs) were designed to have different functional groups that provide to them both tunable optical properties and adjustable HOMO/LUMO levels, and were selectively prepared (starting from 1,4,5,8-naphthalenetetracarboxylic acid) achieving yields >69%. Smart anchoring groups (i.e. carboxylates or aromatic amines) were added to the dyes in order to allow them to covalently bond to acidic -OH groups present on the BiVO4 surface. An easy and low-cost room temperature dip-coating technique was used to dye-sensitize both BiVO4 powders and thin films. NMR, MS, FT-IR, TG, FESEM, XRD, XPS and optical analyses confirmed the successful organic synthetic routes and good dyes/BiVO4 linkages. Photochemical and photoelectrochemical water oxidation reaction tests, together with DFT calculations, demonstrated that a proper alignment of the semiconductor/NDI-based dye energy levels is fundamental for enhancing the photocatalyst performance through a Z-scheme mechanism. The ability of the NDI organic molecules to delocalize the electronic charges was also a key factor for minimizing recombination processes and achieving more than a ten-fold increase in the photocurrent density of a 6 cm2 BiVO4 photo-electrode. The here reported results open new perspectives for the utilization of this new series of core-substituted NDIs, which are able to improve the activity of photocatalysts for different sunlight-driven applications, e.g. waste water treatment and organic contaminants' degradation, other than the production of solar fuels by water splitting mechanisms
    Thematic Areas: Química Pollution Medicina veterinaria Medicina ii Materiais Interdisciplinar Green & sustainable science & technology Farmacia Environmental chemistry Engenharias iv Engenharias iii Engenharias ii Ciências biológicas ii Ciências biológicas i Ciências agrárias i Ciência de alimentos Chemistry, multidisciplinary Chemistry Biotecnología Astronomia / física
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 1463-9262
    Author's mail: cyril.godard@urv.cat j.carbo@urv.cat sergio.castillon@urv.cat carmen.claver@urv.cat
    Author identifier: 0000-0001-5762-4904 0000-0002-3945-6721 0000-0002-0690-7549 0000-0002-2518-7401
    Record's date: 2024-11-16
    Papper version: info:eu-repo/semantics/acceptedVersion
    Link to the original source: https://pubs.rsc.org/en/content/articlelanding/2017/gc/c7gc00125h#!divAbstract
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Papper original source: Green Chemistry. 19 (10): 2448-2462
    APA: Hernández S; Ottone C; Proto S; Tolod K; Díaz De Los Bernardos M; Solé-Daura A; Carbó J; Godard C; Castillón S; Russo N; Saracco G; Claver C (2017). Core-substituted naphthalenediimides anchored on BiVO4 for visible light-driven water splitting. Green Chemistry, 19(10), 2448-2462. DOI: 10.1039/c7gc00125h
    Article's DOI: 10.1039/c7gc00125h
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2017
    Publication Type: Journal Publications
  • Keywords:

    Chemistry,Chemistry, Multidisciplinary,Environmental Chemistry,Green & Sustainable Science & Technology,Pollution
    Clean water and sanitation
    Química
    Pollution
    Medicina veterinaria
    Medicina ii
    Materiais
    Interdisciplinar
    Green & sustainable science & technology
    Farmacia
    Environmental chemistry
    Engenharias iv
    Engenharias iii
    Engenharias ii
    Ciências biológicas ii
    Ciências biológicas i
    Ciências agrárias i
    Ciência de alimentos
    Chemistry, multidisciplinary
    Chemistry
    Biotecnología
    Astronomia / física
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