Self-Assembled Array of Tethered Manganese Oxide Nanoparticles for the Next Generation of Energy Storage

Stevens, Tyler E.; Pearce, Charles J.; Whitten, Caleah N.; Grant, Richard P.; Monson, Todd C.

doi:10.1038/srep44191

Cited by 10 publications

(3 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After 2-ATP immobilization onto the WSH fabric, new bands appeared in the 2ATP/WSH spectrum at 2607, 1518, 1460, 1235, and 1138 cm –1 , corresponding to the respective stretching vibrations of S–H, CC (1518 and 1460 cm –1 ), C–N, and in-plane aromatic C–H or N–H deformations of 2-ATP. , …”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Easily Applicable Heterogeneous Catalyst from Sustainable Resources: Anchoring of Pd Nanoparticles onto Chemically Poly(2-amino thiophenol)-Modified Wool Fabrics

Başbuğ

Erdoğan

Karakışla

et al. 2022

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

For preparing the Pd nanoparticle (PdNP)-decorated heterogeneous catalyst material, wool fabric was utilized as a practical platform after enriching its chemical functionality with two straightforward chemical processes. First, wool keratin was transformed to a reduced structure (WSH) with NaHS by extracting −SH groups and then reconstructed to the S−S linkages by the covalent attachment of 2-amino thiophenol (2-ATP). The graft copolymerization of 2-ATP onto this 2-ATP/WSH surface was ensured to prepare a P2ATP-g-WSH copolymer fabric. As the second process, the polymerization of 2-ATP was also performed on the WSH fabrics to prepare a P2ATP/WSH composite. The PdNP anchoring was subsequently ensured onto these copolymer and composite samples through the in situ reduction of Pd 2+ to the PdNPs. The conditions yielding the highest PdNP content were investigated in detail, and the PdNP formation abilities of both fabrics prepared by different routes were compared. It was observed that the contribution of PdNPs through the P2ATP/WSH composite route was relatively high compared to that of the copolymer route. The structural and morphological alterations in the wool nature, the existence, the oxidation state, and the relative abundance (%) of PdNPs with respect to the Pd 2+ ions were evidenced by many techniques in detail. After examining the performance of the PdNP composites in the catalytic reduction of two nitroarenes to the aminoarenes, the Pd/ P2ATP/WSH demonstrated satisfactorily high performance in terms of reduction yield (%), reduction rate constant (min −1 ), and reusability, compared to that of Pd/P2ATP-g-WSH.

show abstract

Section: Resultsmentioning

confidence: 99%

“…−1 , corresponding to the respective stretching vibrations of S−H, C�C (1518 and 1460 cm −1 ), C−N, and in-plane aromatic C−H or N−H deformations of 2-ATP 43,44. …”

mentioning

confidence: 99%

Easily Applicable Heterogeneous Catalyst from Sustainable Resources: Anchoring of Pd Nanoparticles onto Chemically Poly(2-amino thiophenol)-Modified Wool Fabrics

Başbuğ

Erdoğan

Karakışla

et al. 2022

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

show abstract

“…Upon modification with 4-MPBA, one oxidation peak is visible at +0.45 V in the first cycle [ 29 ], but is no longer seen on subsequent cycles since MBPA oxidation is irreversible. In addition, the incorporation of 4-MPBA induces a decrease of the capacitive contribution characteristic to organic adsorption, attributed to the low dielectric constant [ 30 ]; the capacitance remained unchanged upon consecutive cycling.…”

Section: Resultsmentioning

confidence: 99%

Immobilized Antibodies on Mercaptophenylboronic Acid Monolayers for Dual-Strategy Detection of 20S Proteasome

Bârsan

Sanz

Onea

et al. 2021

Sensors

View full text Add to dashboard Cite

A dual strategy for the electrochemical detection for 20S proteasome (20S) is proposed, based on the oriented immobilization of a capture monoclonal antibody (Abβ) on a self-assembled monolayer of 4-mercaptophenylboronic acid (4-MPBA) on gold electrodes, which led to the Au/4-MPBA/Abβ immunosensor. The methodology comprises the correlation of 20S concentration with (i) its proteolytic activity toward the Z-LLE-AMC substrate, using the Au/4-MPBA/Abβ/20S, and (ii) the enzymatic activity of an alkaline phosphatase (AlkP) from the AlkP-labeled secondary antibody (Abcore-AlkP), which involves the conversion of aminophenylphosphate to the electroactive aminophenol using Au/4-MPBA/Abβ/20S/Abcore-AlkP. The step-by-step construction of the immunosensor and the interactions at its surface were evaluated by surface plasmon resonance and gravimetric analysis with quartz crystal microbalance, showing a high affinity between both antibodies and 20S. Morphological analysis by scanning electron microscopy demonstrated a pattern of parallel lines upon immobilization of Abβ on 4-MPBA and morphological changes to a well-organized granular structure upon binding of 20S. A voltametric and impedimetric characterization was performed after each step in the immunosensor construction. The two detection strategies were evaluated. It was shown that the immunosensor responds linearly with 20S concentration in the range between 5 and 100 µg mL−1, which corresponds to proteasome levels in serum in the case of diverse pathological situations, and LoD values of 1.4 and 0.2 µg mL−1 were calculated for the detection strategies. The immunosensor was applied to the detection of 20S in serum samples with recovery values ranging from 101 to 103%.

show abstract

Sequential Deposition of Polyaminothiophenols and Gold Nanoparticle on Wool Fabrics: Fabric Composites as Efficient Catalysts in the Reduction of Nitroarenes

Başbuğ,

Erdoğan,

Karakışla

et al. 2023

ChemistrySelect

View full text Add to dashboard Cite

Merino wool, a highly abundant natural fabric, was successfully transformed into a valuable substrate for preparing easily recoverable catalyst materials by depositing gold nanoparticles (AuNPs) through a series of modification steps. The functionality of wool was enhanced by cleaving‐SH groups using NaHS chemical reduction. Subsequently, the reduced wool keratin (WSH) was covalently attached to 3‐amino thiophenol (3‐ATP) or 4‐amino thiophenol (4‐ATP) monomers via S−S linkages. The surface was further modified by grafting P3ATP or P4ATP through oxidative polymerization of 3‐ATP or 4‐ATP using ammonium persulfate as an oxidant. Finally, AuNPs were deposited onto the P3ATP or P4ATP‐grafted wool (P3ATP‐g‐WSH or P4ATP‐g‐WSH) by immersing the samples in an aqueous HAuCl4 solution. Additionally, P3ATP or P4ATP‐coated composites (P3ATP/WSH or P4ATP/WSH) were prepared to assess the AuNP formation ability of the grafting. The structural and morphological changes occurred in the wool, and the presence of AuNPs was revealed by ATR‐FTIR, XPS, SEM, and contact angle. The catalytic performance of the AuNP‐containing composites in reducing various nitroarenes to aminoarenes using an excess of electron‐donor (NaBH4) was monitored by UV‐vis spectroscopy. The developed composites demonstrated high efficiency, reusability, and rapid catalytic activity, achieving the highest apparent rate constant of 3.79 min−1, even within 1 min.

show abstract

Self-Assembled Array of Tethered Manganese Oxide Nanoparticles for the Next Generation of Energy Storage

Cited by 10 publications

References 61 publications

Easily Applicable Heterogeneous Catalyst from Sustainable Resources: Anchoring of Pd Nanoparticles onto Chemically Poly(2-amino thiophenol)-Modified Wool Fabrics

Easily Applicable Heterogeneous Catalyst from Sustainable Resources: Anchoring of Pd Nanoparticles onto Chemically Poly(2-amino thiophenol)-Modified Wool Fabrics

Immobilized Antibodies on Mercaptophenylboronic Acid Monolayers for Dual-Strategy Detection of 20S Proteasome

Sequential Deposition of Polyaminothiophenols and Gold Nanoparticle on Wool Fabrics: Fabric Composites as Efficient Catalysts in the Reduction of Nitroarenes

Contact Info

Product

Resources

About