Dipyridylbenzene as a charming sensitizer to significantly enhance the photocatalytic activity of titanium dioxide

Li, Heng; Li, Meng; Zhang, Lijun; Zhang, Xiang; Ma, Yanfei; Yu, Bing; Wei, Qiang; Yin, Shu

doi:10.1016/j.apcatb.2018.03.096

Cited by 13 publications

(4 citation statements)

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“…Dihydropyridines possess antioxidant properties, 23 and their molecular stability can be greatly enhanced when connected with an aromatic ring. 24 Their aromatization to pyridine derivatives under oxidation conditions is another method that can be used to increase stability, [25][26][27][28] and, thus, they have been used in the preparation of photocatalysts. [29][30][31][32] Accordingly, using hightemperature intermolecular condensation and then initial graphitization of multi-functional 1,4-dihydropyridine, we constructed a graphite-like hybrid structure on the surface of nano TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

Primary graphitization of multi-functional dihydropyridine, a novel method for reconstructing a TiO₂ surface to obtain high photocatalytic activity for hydrogen peroxide synthesis

et al. 2023

Sustainable Energy Fuels

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Section: Introductionmentioning

confidence: 99%

Primary graphitization of multi-functional dihydropyridine, a novel method for reconstructing a TiO₂ surface to obtain high photocatalytic activity for hydrogen peroxide synthesis

et al. 2023

Sustainable Energy Fuels

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“…Nowadays, the development of effective PS for PDI starts from simple metal complexes, through metal-modified macrocycles, up to metal oxides and hybrid (nano)materials [9]. Nanomaterials possess their unique physical and chemical properties as a result of quantum effect, largely influenced by the size and geometry of the material [26,27]. Another beneficial aspect of nanoscale surface topography of the materials is high surface area and its interactions with biologically important molecules present in bacteria cells (e.g., proteins, DNA, or lipid membranes) [28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Surface Modification of Nanocrystalline TiO2 Materials with Sulfonated Porphyrins for Visible Light Antimicrobial Therapy

et al. 2019

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Highly-active, surface-modified anatase TiO2 nanoparticles were successfully synthesized and characterized. The morphological and optical properties of the obtained (metallo)porphyrin@qTiO2 materials were evaluated using absorption and fluorescence spectroscopy, scanning electron microscopy (SEM) imaging, and dynamic light scattering (DLS). These hybrid nanoparticles efficiently generated reactive oxygen species (ROS) under blue-light irradiation (420 ± 20 nm) and possessed a unimodal size distribution of 20–70 nm in diameter. The antimicrobial performance of the synthetized agents was examined against Gram-negative and Gram-positive bacteria. After a short-term incubation of microorganisms with nanomaterials (at 1 g/L) and irradiation with blue-light at a dose of 10 J/cm2, 2–3 logs of Escherichia coli, and 3–4 logs of Staphylococcus aureus were inactivated. A further decrease in bacteria viability was observed after potentiation photodynamic inactivation (PDI), either by H2O2 or KI, resulting in complete microorganism eradication even when using low material concentration (from 0.1 g/L). SEM analysis of bacteria morphology after each mode of PDI suggested different mechanisms of cellular disruption depending on the type of generated oxygen and/or iodide species. These data suggest that TiO2-based materials modified with sulfonated porphyrins are efficient photocatalysts that could be successfully used in biomedical strategies, most notably, photodynamic inactivation of microorganisms.

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“…Considering the fact that the ultraviolet light accounts for only 5% of sunlight, quite limited solar energy is absorbed by conventional inorganic semiconductors, which retards their practical applications. Therefore, various physical and/or chemical methods including doping, dye sensitization, and π-conjugated molecule coupling have been developed to improve the visible light-responsive photocatalytic activity of inorganic semiconductors. − It is still a challenging subject to develop heterogeneous photocatalysts with promising visible light photocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Metal-Free Organic Optoelectronic Molecule as a Highly Efficient Photocatalyst for the Degradation of Organic Pollutants

Zhang

Sun

et al. 2019

ACS Omega

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With the increasing consumption of natural resources, photocatalysis converting solar energy to chemical energy has attracted extensive attention of researchers owing to the advantages of developing energy-saving and environmentally benign processes. In this work, a facile and simple method was developed to synthesize a metal-free organic optoelectronic molecule (denoted as DPPRD), which is composed of a central diketopyrrolopyrrole moiety and two terminal units of a rhodanine (RD) moiety. This is a first green strategy toward the synthesis of DPPRD. Because of good thermal stability, narrow band gap, and excellent visible light absorption of solar spectrum, DPPRD exhibited to be an efficient and chemically stable photocatalyst for visible light degradation of organic pollutants such as bisphenol A (BPA) and methyl orange (MO) in aqueous solution. The control experiments with different types of radical scavengers implied that the hole (h + ) and hydroxyl radicals ( • OH) were the key reactive species during the photodegradation processes. The photodegradation pathways of BPA and MO were thus proposed based on the identified intermediates. This improved method for DPPRD synthesis is expected to widen its applications to industrial production, whereas its excellent visible light photocatalytic activity would be utilized potentially in the field of environmental and industrial applications.

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Dipyridylbenzene as a charming sensitizer to significantly enhance the photocatalytic activity of titanium dioxide

Cited by 13 publications

References 51 publications

Primary graphitization of multi-functional dihydropyridine, a novel method for reconstructing a TiO₂ surface to obtain high photocatalytic activity for hydrogen peroxide synthesis

Primary graphitization of multi-functional dihydropyridine, a novel method for reconstructing a TiO₂ surface to obtain high photocatalytic activity for hydrogen peroxide synthesis

Surface Modification of Nanocrystalline TiO2 Materials with Sulfonated Porphyrins for Visible Light Antimicrobial Therapy

Metal-Free Organic Optoelectronic Molecule as a Highly Efficient Photocatalyst for the Degradation of Organic Pollutants

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Dipyridylbenzene as a charming sensitizer to significantly enhance the photocatalytic activity of titanium dioxide

Cited by 13 publications

References 51 publications

Primary graphitization of multi-functional dihydropyridine, a novel method for reconstructing a TiO2 surface to obtain high photocatalytic activity for hydrogen peroxide synthesis

Primary graphitization of multi-functional dihydropyridine, a novel method for reconstructing a TiO2 surface to obtain high photocatalytic activity for hydrogen peroxide synthesis

Surface Modification of Nanocrystalline TiO2 Materials with Sulfonated Porphyrins for Visible Light Antimicrobial Therapy

Metal-Free Organic Optoelectronic Molecule as a Highly Efficient Photocatalyst for the Degradation of Organic Pollutants

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Product

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Primary graphitization of multi-functional dihydropyridine, a novel method for reconstructing a TiO₂ surface to obtain high photocatalytic activity for hydrogen peroxide synthesis

Primary graphitization of multi-functional dihydropyridine, a novel method for reconstructing a TiO₂ surface to obtain high photocatalytic activity for hydrogen peroxide synthesis