Surface-Engineered Polydopamine Particles as an Efficient Support for Catalytic Applications

Liu, Yanhong; Li, Guozhu; Qin, Runze; Chen, Danlei

doi:10.1021/acs.langmuir.6b03340

Cited by 31 publications

(23 citation statements)

References 77 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For this system the intermediate products-i.e., N-(4-hydroxyphenyl)hydroxylamine and 4-nitrosophenol-reduce so rapidly that only 4-aminophenol is detected. Despite its apparent simplicity, the rate law for this heterogeneous 3 Values determined by applying the BJH model on the adsorption branch of the isotherms (P/P 0 < 0.8). 4 Values determined by applying the BJH model on the adsorption branch of the isotherms (P/P 0 > 0.8).…”

Section: Catalyst Activitymentioning

confidence: 99%

“…The immobilization of metal nanoparticles (NPs) on inorganic, organic, or hybrid supports has attracted a considerable attention by their potential applications as efficient catalysts as it adds the classic advantages of the heterogeneous catalysis to the bottom-up approach of NP system [1]. The NPs immobilization is a challenge due to the loss of control in the interface where the metal-support interaction plays a key role in the synthesis of an efficient catalysts [2,3]. The modification of the support aimed at generating a suitable environment that controls the charge and dispersion of the metal NPs and that avoids their aggregation and leaching, is one of the most interesting approaches in the development of metal NPs supported catalysts [3].…”

Section: Introductionmentioning

confidence: 99%

“…The NPs immobilization is a challenge due to the loss of control in the interface where the metal-support interaction plays a key role in the synthesis of an efficient catalysts [2,3]. The modification of the support aimed at generating a suitable environment that controls the charge and dispersion of the metal NPs and that avoids their aggregation and leaching, is one of the most interesting approaches in the development of metal NPs supported catalysts [3].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Highly Active Hydrogenation Catalysts Based on Pd Nanoparticles Dispersed along Hierarchical Porous Silica Covered with Polydopamine as Interfacial Glue

et al. 2020

View full text Add to dashboard Cite

New catalysts based on Pd(0) nanoparticles (Pd NPs) on a bimodal porous silica of the UVM-7/polydopamine (PDA) support have been synthesized following two preparative strategies based on the sequential or joint incorporation of two components of the composite (Pd and PDA). We analyzed the role played by the PDA as ‘interfacial glue’ between the silica scaffold and the Pd NPs. The catalysts were tested for the hydrogenation of 4-nitrophenol using (NEt4)BH4 as the hydrogenating agent. In addition to the palladium content, the characterization of the catalysts at the micro and nanoscale has highlighted the importance of different parameters, such as the size and dispersion of the Pd NPs, as well as their accessibility to the substrate (greater or lesser depending on their entrapment level in the PDA) on the catalytic efficiency. Staged sequential synthesis has led to better catalytic results. The most active Pd(0) centers seem to be Pd NPs of less than 1 nm on the PDA surface. The efficiency of the catalysts obtained is superior to that of similar materials without PDA. A comprehensive comparison has been made with other catalysts based on Pd NPs in a wide variety of supports. The TOF values achieved are among the best described in the literature.

show abstract

Section: Catalyst Activitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Highly Active Hydrogenation Catalysts Based on Pd Nanoparticles Dispersed along Hierarchical Porous Silica Covered with Polydopamine as Interfacial Glue

et al. 2020

View full text Add to dashboard Cite

show abstract

“…In another study, the surface of PDA particles (∼280 nm) was modified by treatment with HS(CH 2 ) 12 COOH (HS carbox ) in the presence of CF 3 COOH in ethanolic solution to generate a rough surface. The reaction of this support with H 2 [PdCl 4 ] facilitated the formation and deposition of small uniform particles (2–3 nm) . According to XPS, palladium was only partially reduced (10 % Pd 0 ).…”

Section: Removal Of Toxic Materialsmentioning

confidence: 99%

Polydopamine – its Prolific Use as Catalyst and Support Material

Molnár

2020

ChemCatChem

View full text Add to dashboard Cite

Polydopamine is a mussel-inspired functional material with a unique ability to form surface coatings. It is a green, environmentally benign product available very easily for a multitude of varied applications. This review attempts to collect useful information with respect to polydopamine-based catalytic studies with the use of polydopamine and modified polydopamine preparations loaded with varied catalytically active species including metal ions and metal particles. Major sections are about the use of polydopamine as catalyst material, utilization of immobilized enzymes, removal of toxic materials, results in organic synthesis, and fuel cell applications. A few examples of chiral catalysis and results of recycling studies are also treated. Data collected and analyzed indicate the importance and high potential of polydopamine-based catalysts in sustainable chemistry. of subunits attacked by an immobilized cyclohexeneamine (5) was suggested to be the transition state of CÀ C bond formation.Edouard et al. prepared catalyst 0.29 % PDA/PU by depositing PDA onto polyurethane foam (PU, 180 � 20 mg, 8 cm 3 ) and used it for the reduction of methylene blue (MB) with NaBH 4 . [48] Activities decreased gradually with repeated uses from 100 % to 35 % in run 11 but partial reactivation was achieved upon keeping the sample at 67°C for 8 h (55 % dropping below 10 % in run 13). Exposure to air at room temperature for six days proved to be somewhat more beneficial (90 % conversion in run 14 decreasing to 48 % in run 18). In a recent study they fabricated two oxidized PDA/PU samples and then loaded them with NaBH 4 . [49] One made by the usual method (dopamine/Tris, rt, 12 h, in air; sample PDA O2 PU), whereas the other was made by treating PU in a mixture of dopamine, NaOAc, and NaIO 4 (pH 5, rt, 24 h). The sample was dried (67°C) and washed thoroughly with water (PDA NaIO4 PU). Both products were dipped into an aqueous solution of NaBH 4 (0.1 M, 10 min) to afford boron contents of 2.37 and 2.11 wt%. The catalysts tested in the degradation of MB showed high activities with efficiencies of 97 % and 98 %, respectively (NaBH 4 /MB molar ratio 40, 177 mg and 209 mg catalysts, 25 min). During five reuses, the pH of the reaction medium increased because of boron loss (0.78 wt% and 0.81 wt%). The activity of PDA NaIO4 PU decreased to 89 % in run five. However, dipping the used sample into a 0.1 M NaBH 4 solution restored the original efficiency of 98 %. This, however, was only a temporary remedy, since a low efficiency of 60 % was measured in run 10. PDA was suggested by the authors to act as a redox mediator to prevent the hydrolysis/oxidation of immobilized borohydride.This formula (5) should be moved up and placed before the paragraph starting with "Edouard et al…"The Zuo group used PDA particles (avg. diameter 240 nm) to induce the reduction of MB and rhodamine B (RhB) with NaBH 4 . [50] Quinone moieties of PDA were assumed to channel electrons from NaBH 4 to the dyes. Indeed, PDA oxidized with NaIO 4 exhibited increased degradatio...

show abstract

“…Therefore, from k kapp/CPd, we derived k1, which represents the intrinsic catalytic activity and allows a reasonable comparison with the results reported by other groups using supported Pd NPs. [28][29][30][31] The k value was determined to be 1.42 and 0.90 s -1 •mmol -1 •L for PS/Pd (Pd NPs, ca. 4.5 nm) and PS/Pd (Pd NPs, ca.…”

Section: Inorganic Chemistry Frontiers Accepted Manuscriptmentioning

confidence: 99%

Simple surface-assisted formation of palladium nanoparticles on polystyrene microspheres and their application in catalysis

Zhao

Feng

Hong

et al. 2018

Inorg. Chem. Front.

View full text Add to dashboard Cite

show abstract

Surface-Engineered Polydopamine Particles as an Efficient Support for Catalytic Applications

Cited by 31 publications

References 77 publications

Highly Active Hydrogenation Catalysts Based on Pd Nanoparticles Dispersed along Hierarchical Porous Silica Covered with Polydopamine as Interfacial Glue

Highly Active Hydrogenation Catalysts Based on Pd Nanoparticles Dispersed along Hierarchical Porous Silica Covered with Polydopamine as Interfacial Glue

Polydopamine – its Prolific Use as Catalyst and Support Material

Simple surface-assisted formation of palladium nanoparticles on polystyrene microspheres and their application in catalysis

Contact Info

Product

Resources

About