Palladium nanoparticles supported on silica, alumina or titania: greener alternatives for Suzuki–Miyaura and other C–C coupling reactions

Díaz-Sánchez, Miguel; Díaz-García, Diana; Prashar, Sanjiv; Gómez‐Ruiz, Santiago

doi:10.1007/s10311-019-00899-5

Cited by 52 publications

(24 citation statements)

References 136 publications

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“…Titanium dioxide has demonstrated to be one of the best solid supports for metal nanoparticles in C-C coupling reactions. [66] This type of reaction is linked to the presence of expensive metals such as Pd, which is a major economic and environmental disad vantage for the process. The replacement of this metal by other cheaper, more abundant, and less polluting metals is paramount.…”

Section: Catalytic C-c Coupling Reaction Of Iodobenzene and Phenylboronic Acidmentioning

confidence: 99%

“…In order to determine if a synergy between both elements is present, a comparison of these materials has been performed with other systems containing only copper, fluorine, or no dopant agents in their structure. Thus, taking advantage of the excellent capa bilities that titanium dioxide shows as a catalytic support, [66] the materials obtained were used in the preparation of hybrid systems with Pd nanoparticles for Suzuki-Miyaura C-C cou pling. In addition, these hybrid materials have proven to be active in dehalogenationhydrogenation reactions, [54,[67][68][69][70] and therefore, are of interest for their potential application in the dehalogenation of plastic or biomass waste in the preparation of solid or liquid fuels for cleaner energy generation.…”

Section: Introductionmentioning

confidence: 99%

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Synergistic Effect of Cu,F‐Codoping of Titanium Dioxide for Multifunctional Catalytic and Photocatalytic Studies

Díaz-Sánchez

Murgu

Díaz-García

et al. 2021

Advanced Sustainable Systems

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This material has been used as a photo catalyst for water splitting since 1972 when Fujishima and Honda reported its ability to generate hydrogen and oxygen from water molecules. [1] Titanium dioxide is normally used in advanced oxidation processes, [2] in systems capable of elimi nating a wide variety of chemicals in air and water, as well as solar fuel production (such as H 2 ). [3,4] The photoactivated pro cesses of titanium dioxidebased photo catalysts are achieved when the irradiation energy is higher than its band gap. This generates electrons in the conduction band and holes in valence band, which rapidly migrate to the TiO 2 surface and provoke the generation of extremely reactive spe cies. For example, H 2 O 2 and the radicals OH • , O 2-• formed after the electron and the holes reach the external surface of titanium dioxide, are very important for the photodecomposition of organic pol lutants to CO 2 and H 2 O, which is true for the most active titanium dioxidebased materials. [5,6] The band gap value has a direct impact on the rate of electronhole (e --h +) recombination during the photocatalytic processes. In the case of titanium dioxide, the relatively large band gap, means there is a slow recombination rate compared to most of the other photocatalysts. [7] Three main phases are present in TiO 2 : 1) Anatase (tetrag onal, a = b = 3.785 Å, c = 9.54 Å), 2) brookite (orthorhombic, a = 5.143 Å, b = 5.456 Å, c = 9.182 Å), and 3) rutile (tetragonal a = b = 4.593 Å, c = 2.959 Å). [8,9] The thermodynamically meta stable phases, anatase, and brookite, irrevocably pass into the stable phase of rutile at high temperatures. [7] Each of these phases show its own morphological characteristics and band gap value: In the case of anatase the band gap is of 3.2 eV, while rutile and brookite have band gaps of 3.0 and 3.3 eV, respec tively. In general, anatase shows the most attractive photocata lytic behavior due to its versatility and textural properties. [10][11][12] However, the anatase phase, due to its band gap, can only be activated by UV light, which accounts for approximately only 4% of the solar spectrum. Thus, in order to stabilize the anatase phase at elevated temperatures, and to utilize UV and visible light for photocatalysis, chemical modifiers and dopants are generally employed for the modification of the photocatalytic Titanium dioxide nanomaterials with improved catalytic and photo catalytic properties through codoping with copper and fluorine are synthesized and contain optimal textural and compositional properties, which are not possible without doping or with a single doping of Cu or F separately. The codoped systems promote the generation of a synergistic effect increasing activity of the systems in photocatalytic processes of both potential environmental or energy interest. The photocatalysts show very effective degradations of industrial and emerging contaminants such as ciprofloxacin (80% degradation) and naproxen (72% degradation) using UV light (300 W) in short periods of up to 15 min. An ad...

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Section: Catalytic C-c Coupling Reaction Of Iodobenzene and Phenylboronic Acidmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synergistic Effect of Cu,F‐Codoping of Titanium Dioxide for Multifunctional Catalytic and Photocatalytic Studies

Díaz-Sánchez

Murgu

Díaz-García

et al. 2021

Advanced Sustainable Systems

Self Cite

View full text Add to dashboard Cite

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“…The chelation between the support and the PdNPs stabilizes the nanoparticles and prevents the agglomeration phenomena, consequently increasing the catalytic activity and facilitating its recovery and reuse. Various supports have been developed for anchoring and stabilizing PdNPs such as organic polymers, inorganic materials, organic-inorganic hybrids and carbon materials [4][5][6][100][101][102][103][104].…”

Section: Biopolymers As Supportsmentioning

confidence: 99%

Green Synthesis of Pd Nanoparticles for Sustainable and Environmentally Benign Processes

Piermatti

2021

Catalysts

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Among transition metal nanoparticles, palladium nanoparticles (PdNPs) are recognized for their high catalytic activity in a wide range of organic transformations that are of academic and industrial importance. The increased interest in environmental issues has led to the development of various green approaches for the preparation of efficient, low-cost and environmentally sustainable Pd-nanocatalysts. Environmentally friendly solvents, non-toxic reducing reagents, biodegradable capping and stabilizing agents and energy-efficient synthetic methods are the main aspects that have been taken into account for the production of Pd nanoparticles in a green approach. This review provides an overview of the fundamental approaches used for the green synthesis of PdNPs and their catalytic application in sustainable processes as cross-coupling reactions and reductions with particular attention afforded to the recovery and reuse of the palladium nanocatalyst, from 2015 to the present.

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“…The electrostatic or steric interactions between nanoparticles, which were created by the coating ligands, are the key for stabilizing the metal nanoparticles. The protection of PdNPs can be also gained by supporting them on the inorganic materials [60].…”

Section: Stabilization Proceduresmentioning

confidence: 99%

“…The supporting of PdNPs on the most widely used inorganic matrices, such as silica, titanium dioxide, and alumina, to form nanoreactors, is an important strategy to protect the PdNPs, especially for the catalytic and photocatalytic applications [60]. The use of these nanoreactors can improve the dispersion and the recyclability of PdNPs on C-C coupling reactions [60]. Balbín et al prepared the PdNPs on two different mesoporous silica supports for effective catalysts and cytotoxic agents against cancer cells [48].…”

Section: Stabilization Proceduresmentioning

confidence: 99%

An Up-To-Date Review on Biomedical Applications of Palladium Nanoparticles

et al. 2019

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Palladium nanoparticles (PdNPs) have intrinsic features, such as brilliant catalytic, electronic, physical, mechanical, and optical properties, as well as diversity in shape and size. The initial researches proved that PdNPs have impressive potential for the development of novel photothermal agents, photoacoustic agents, antimicrobial/antitumor agents, gene/drug carriers, prodrug activators, and biosensors. However, very few studies have taken the benefit of the unique characteristics of PdNPs for applications in the biomedical field in comparison with other metals like gold, silver, or iron. Thus, this review aims to highlight the potential applications in the biomedical field of PdNPs. From that, the review provides the perceptual vision for the future development of PdNPs in this field.

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Palladium nanoparticles supported on silica, alumina or titania: greener alternatives for Suzuki–Miyaura and other C–C coupling reactions

Cited by 52 publications

References 136 publications

Synergistic Effect of Cu,F‐Codoping of Titanium Dioxide for Multifunctional Catalytic and Photocatalytic Studies

Synergistic Effect of Cu,F‐Codoping of Titanium Dioxide for Multifunctional Catalytic and Photocatalytic Studies

Green Synthesis of Pd Nanoparticles for Sustainable and Environmentally Benign Processes

An Up-To-Date Review on Biomedical Applications of Palladium Nanoparticles

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