Synthesis and application of thiolated mesoporous silicas for sorption, preconcentration and determination of platinum

Barczak, Mariusz; Dobrzyńska, Joanna; Oszust, Monika; Skwarek, Ewa; Ostrowski, Jarosław; Zięba, Emil; Borowski, Piotr; Dobrowolski, Ryszard

doi:10.1016/j.matchemphys.2016.06.042

Cited by 36 publications

(15 citation statements)

References 54 publications

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“…While immobilizing the two metal ions, the thiol has reduced the chemical state of Pt from +4 to +2 and Au from +3 to +1, as probed by XPS technique (Figures S5 and S7). , …”

Section: Resultsmentioning

confidence: 99%

Minimalization of Metallic Pd Formation in Suzuki Reaction with a Solid-State Organometallic Catalyst

Zeng

2020

ACS Appl. Mater. Interfaces

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Suzuki reaction usually uses palladium (Pd) complexes to accommodate a wide range of substrates. In pursuing greener synthesis, immobilization of Pd complexes with various support materials has shown promising potential. Although this approach can give stable conversion, initially immobilized Pd ions are largely reduced to Pd 0 aggregates and turned essentially into supported nanoparticles after use, which departs from its original intention of complex immobilization and thus hampers its activity. Herein, we immobilize noble metal ions into a spherical thiolated organosilica. This new type of catalysts can catalyze Suzuki reaction homogeneously via leaching out Pd ions and shuttling them back after the reaction. The excellent reusability attained can be attributed to minimalization of forming metallic palladium. Thus, the developed catalysts can be viewed as a two-way device to release and to restore metal ions for homogeneous catalysis.

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“…While immobilizing the two metal ions, the thiol has reduced the chemical state of Pt from +4 to +2 and Au from +3 to +1, as probed by XPS technique (Figures S5 and S7). , …”

Section: Resultsmentioning

confidence: 99%

Minimalization of Metallic Pd Formation in Suzuki Reaction with a Solid-State Organometallic Catalyst

Zeng

2020

ACS Appl. Mater. Interfaces

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“…The adsorption efficiency of the SPION@3-MPA towards Pt(IV) (0. 31 mmol g ) is poorer with respect to other adsorbents as evidenced from the comparison with data reported in Table 2 [50,51,52], but higher with respect to the adsorption capacity shown by magnetic cellulose functionalized with thiol and amine [8].…”

Section: Figmentioning

confidence: 72%

Thermodynamics of sorption of platinum on superparamagnetic nanoparticles functionalized with mercapto groups

Melchior

Lanas

Valiente

et al. 2018

J Therm Anal Calorim

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The adsorption of Pt(IV) by iron oxide (Fe O ) superparamagnetic nanoparticles (SPION) functionalized with 3-mercaptopropionic acid (3-MPA) is investigated by means of inductively coupled plasma optical emission spectrometry and isothermal titration calorimetry. Experimental ICP data are better fitted by Langmuir rather than Freundlich isotherms. The whole thermodynamic parameters and maximum loading capacity for the adsorption process of Pt(IV) on the functionalized SPION nanoparticles

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“…All modifications led to an increase of the surface uptake capability, although the positive impact compared to P-CMK was the lowest for H-CMK (+16%) and the highest for D-CMK (+ ~100%). The sorption equilibrium data were modeled with Langmuir and Freundlich adsorption models (the appropriate equations can be found in our previous works [46,47]), and the fitted results are presented in Figure 5b while the fitting parameters and determination coefficients, R 2 , in Table 3. The fitting clearly shows that for all the samples, except D-CMK, the Langmuir models assuming the formation of adsorbed monolayer provides fit better, and that is reflected in R 2 values.…”

Section: The Deconvolution Of O1s Core Energy Level Resulted In Four mentioning

confidence: 99%

Tailoring Surface Chemistry of Sugar-Derived Ordered Mesoporous Carbons towards Efficient Removal of Diclofenac from Aquatic Environments

et al. 2020

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Ordered mesoporous carbon (CMK-3), obtained from an abundant natural source, sugar, was thermochemically modified with dicyandiamide and thiourea as well as by classical oxidization with hydrogen peroxide to introduce specific surface groups. Thermochemical modifications resulted in carbon with almost unchanged porosity and altered surface chemistry while porosity of H2O2-treated carbon was seriously deteriorated. The obtained carbons were tested as sorbents of diclofenac, considered as one of the emerging water contaminants. Changes in porosity and surface chemistry of modified carbons resulted in significant differences with regard to the uptake of diclofenac. Dicyandiamide-modified carbon showed highest uptake of drugs, reaching 241 mg g−1 that is attributed to its developed microporosity as well as surface chemistry composed of basic groups facilitating electrostatic interactions with diclofenac anions. Desorption study showed that diclofenac is strongly bonded, albeit with a different degree depending on the modification of the CMK-carbon. The obtained results were compared with up-to-date literature regarding sorption of diclofenac by carbon-based sorbents.

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Synthesis and application of thiolated mesoporous silicas for sorption, preconcentration and determination of platinum

Cited by 36 publications

References 54 publications

Minimalization of Metallic Pd Formation in Suzuki Reaction with a Solid-State Organometallic Catalyst

Minimalization of Metallic Pd Formation in Suzuki Reaction with a Solid-State Organometallic Catalyst

Thermodynamics of sorption of platinum on superparamagnetic nanoparticles functionalized with mercapto groups

Tailoring Surface Chemistry of Sugar-Derived Ordered Mesoporous Carbons towards Efficient Removal of Diclofenac from Aquatic Environments

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