Synthesis of a novel graphene-based gold nanocomposite using PVEIM-<i>b</i>-PNIPAM as a stabilizer and its thermosensitivity for the catalytic reduction of 4-nitrophenol

Chen, Shu; Xiang, Yuanfang; Peng, Chang; Xu, Weijian; Banks, M. Katherine; Wu, Ruoxi

doi:10.1039/c8qi01303a

Cited by 23 publications

(10 citation statements)

References 53 publications

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“…This observation was also made in other studies. 31,32 In the reduction reaction of 4-NP by P(NIPAM)-stabilized AuNPs, p(NIPAM) segments shrunk and were wrapped on the surface AuNPs, which resulted in a decrease in the diffusion rate of reactants toward AuNPs and thus on the reaction rate. 31 For graphene-based p(NIPAM)@Au, the phase transition of p(NIPMA) around the LCST leads to a decrease in the number of catalytic sites during the reduction of 4-NP.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Photothermal-Mediated Catalytic Reduction of 4-Nitrophenol Using Poly(N-isopropylacrylamide-acrylamide) and Hollow Gold Nanoparticles

Moon

Kim

2021

ACS Appl. Polym. Mater.

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Hollow gold nanoparticles (HAuNPs) have received significant attention for photothermal applications owing to their strong absorbance in the near-field region, resulting in high photothermal conversion efficiency. Localized surface plasmon resonance (LSPR)-mediated heating, which is a non-radiative property of AuNPs, has been shown to enhance photothermalmediated catalytic reactions. In addition, the modification of the structure and interparticle distance of plasmonic NPs induce the surface plasmon resonance-coupling effect. In this study, we prepared the core-satellite structure used in the photothermalmediated catalytic reduction of 4-nitrophenol with poly(Nisopropylacrylamide-acrylamide) [p(NIPAM-AA)] and HAuNPs. The amount of satellite HAuNPs (80 ppm) on 10 μL of 0.18 M p(NIPAM-AA) core varied from 6 to 12 mL. As-made p(NIPAM-AA)@HAuNP-8 sample reached a photothermal conversion efficiency of 56.9% and showed a high photothermal-mediated catalytic reduction rate. The reaction rate was enhanced from 0.162 to 0.354 min −1 by near-infrared irradiation, resulting in the effective photothermal effect of satellite HAuNPs and the enhanced LSPR-coupling between neighboring HAuNPs through the shrinkage of the p(NIPAM-AA) core. The results showed that the localized heating of p(NIPAM-AA)@HAuNP-8s effectively enhances the catalytic activity through the photothermal effect without the need to heat the entire solution with additional heating.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Photothermal-Mediated Catalytic Reduction of 4-Nitrophenol Using Poly(N-isopropylacrylamide-acrylamide) and Hollow Gold Nanoparticles

Moon

Kim

2021

ACS Appl. Polym. Mater.

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“…Two first-order bands are observed in the 1000-1800 cm À1 region, which correspond to vibrations of carbon atoms at defect sites (D band, E1340 cm À1 ) and vibrations of carbon atoms in the ideal graphitic lattice (G band, E1585 cm À1 ). 26 The difference spectrum, calculated by subtracting both spectra, reveals that the G band became sharper and the D band intensity decreased slightly upon grafting. This observation implies a small increase in the size of the sp 2 domains.…”

Section: Resultsmentioning

confidence: 99%

Covalent attachment of chitosan to graphene via click chemistry for superior antibacterial activity

Huang

Yin

2020

Mater. Adv.

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“…Thus, it enhances the electron exchange in the polymer network and improves the diffusion of I 3 – in the polymer electrolyte. Performing any chemical or physical functionalization on the carbonaceous nanoparticles helps to disperse it homogeneously in the polymer electrolyte. , Besides, functionalization is essential for improving the interaction of modified MWCNT at the interface region of the polymer matrix. The highest efficiency of DSSC reported so far was 6.86% for modified MWCNT with poly(oxyethylene)-segmented oligo(amide-imide) POEM as the dispersant via chemical covalent bonding reaction .…”

Section: Available Alternatives: Polymer Electrolytesmentioning

confidence: 99%

Review on the Revolution of Polymer Electrolytes for Dye-Sensitized Solar Cells

et al. 2021

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Dye-sensitized solar cells (DSSCs) are a suitable replacement for conventional silicon solar cells due to their unique features, such as high energy conversion efficiency and cheap manufacturing cost. The liquid-state DSSCs, however, are poorly sustainable on a long-term basis because volatile liquids are used. The early intention of incorporating polymer into the liquid electrolytes was to curb the problem encountered by liquid electrolytes and enable the DSSCs to function as a long-term stability device. This work briefly reviews how the improvisation has been done on the polymer electrolytes formulation and the extent of how each element can affect the cell efficiency and long-term stability. The role of each component, such as the type of host polymer, iodide salts, nanoparticles, and organic additives that improve the performance of DSSCs, has also been highlighted. This clarified the main purpose of introducing various types of additives into electrolytes to enhance the transport properties as well as the performance of the DSSCs.

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Synthesis of a novel graphene-based gold nanocomposite using PVEIM-b-PNIPAM as a stabilizer and its thermosensitivity for the catalytic reduction of 4-nitrophenol

Abstract: Fabrication of a graphene-based gold nanocomposite using PVEIM-b-PNIPAM as a stabilizer and its thermosensitivity for the reduction of 4-nitrophenol.

Cited by 23 publications

References 53 publications

Photothermal-Mediated Catalytic Reduction of 4-Nitrophenol Using Poly(N-isopropylacrylamide-acrylamide) and Hollow Gold Nanoparticles

Photothermal-Mediated Catalytic Reduction of 4-Nitrophenol Using Poly(N-isopropylacrylamide-acrylamide) and Hollow Gold Nanoparticles

Covalent attachment of chitosan to graphene via click chemistry for superior antibacterial activity

Review on the Revolution of Polymer Electrolytes for Dye-Sensitized Solar Cells

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