Environmental photochemistry by plasmonic semiconductor decorated GO nanocomposites: SERS detection and visible light driven degradation of aromatic dyes

Parvathi, V. Poornima; Parimaladevi, R.; Sathe, Vasant; Umadevi, M.

doi:10.1016/j.apsusc.2018.12.241

Cited by 25 publications

(9 citation statements)

References 28 publications

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“…Various combinations of these graphene materials have been reported in technology applications and studies [28][29][30][31]. Many studies have shown their usefulness especially in electronics, photocatalysis and photovoltaic devices such as in enhancing Raman scattering (SERS) detection and electrochemical detections [32][33][34]. Graphene is known as one of the carbon-based nanomaterials composed of a two-dimensional (2D) hexagonal lattice with special properties, such as high surface area, good electrical conductivity and better thermal conductivity, which may help to be effective in pinning centers in current-carrying capability to improve the J c values [35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Effect of Graphene Nanoparticles Addition on Superconductivity of YBa2Cu3O7~δ Synthesized via the Thermal Treatment Method

et al. 2022

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The development of high-temperature superconductor (HTS) YBa2Cu3O7~δ (Y123) bulks in industrial applications were established years ago. It is one of the developments that currently attracts great attention especially in transportation, superconductor cables and wires. This study is focused on the preparation of the Y123 bulk superconductors by the thermal treatment method due to the promising ways to develop high-quality Y123 superconductors with its simplicity, low cost, and relatively low reaction temperature used during the process. Y123 were added with graphene nanoparticles (x = (0.0–1.0) wt.%). Samples were then characterized by X-ray diffraction (XRD) analysis, field-emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDX), and alternating current susceptibility (ACS). It was found that Y123 confirmed that the majority of phases in all the XRD patterns was the orthorhombic crystal structure and the Pmmm space group with secondary phases belonged to Y2Ba1Cu1O5 (Y211). The highest Tc obtained when graphene nanoparticles were added in the Y123 sample was x = 1.0 wt.%, followed by x = 0.5 wt.% with 92.64 and 92.59 K, respectively. From the microstructure analysis, the average grain size significantly decreased to 4.754 µm at x = 0.5 wt.%. The addition of graphene nanoparticles had disturbed the grain growth of Y123, affecting the superconducting properties of the samples. On the other hand, the intergranular critical current density, Jcm, was found to increase with graphene nanoparticle addition and had the highest value at x = 1.0 wt.%, indicating that graphene nanoparticles acted as pinning centers in the Y123 matrix.

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Section: Introductionmentioning

confidence: 99%

Effect of Graphene Nanoparticles Addition on Superconductivity of YBa2Cu3O7~δ Synthesized via the Thermal Treatment Method

et al. 2022

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“…Pesticide thiabendazole (TBZ) is globally used as a food fungicide in agriculture to endow citrus fruits with freshness. − However, the abuse of TBZ and its excess residue in food severely threaten human health, which has received immense attention and is needed to be addressed urgently. Surface-enhanced Raman scattering (SERS) with a promising advantage of nondestructive examination has been confirmed as a powerful and versatile protocol in food safety, biological detection, chemical analysis, and pollutant monitoring. − It is generally accepted that SERS provides significant amplification of Raman signals for analytes near the plasmonic nanostructures based on gold (Au) and/or silver (Ag) nanoparticles (NPs) regarding the localized surface plasmonic resonance (LSPR) effect. − In recent decades, many efforts have been made to develop sophisticated SERS-active substrates for the sensitive analysis of food contaminants. As it is reported, some conventional rigid SERS substrates have exhibited optimized reproducibility and homogeneity. , However, without flexibility, the application of these rigid substrates for in situ monitoring analytes on curved objects has been limited .…”

Section: Introductionmentioning

confidence: 99%

Contrastive Study of In Situ Sensing and Swabbing Detection Based on SERS-Active Gold Nanobush–PDMS Hybrid Film

Chen

Tian

et al. 2021

J. Agric. Food Chem.

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Surface-enhanced Raman scattering (SERS) with fast and intuitive property has been extensively utilized in the field of food safety. Here, we demonstrated a novel noble metal–polymer hybrid film as a SERS substrate for food fungicide analysis. Benefiting from its transparency and flexibility, poly(dimethylsiloxane) (PDMS) film was chosen as a versatile supporting matrix to grow gold nanobushes (Au NBs) through a seed-mediated process. The as-prepared AuNB–PDMS hybrid film performed satisfactorily in testing 4-nitrothiophenol (4NTP) and exhibited an enhancement factor (EF) of 2.56 × 106. Moreover, the high sensitivity and elastic properties make the hybrid film a promising substrate in practical detection. Hence, the in situ sensing of TBZ, carbaryl, and their mixture was finally realized using the developed hybrid film, which exhibited higher sensitivity than that obtained by the swabbing method. This high-performance SERS substrate based on the flexible and transparent AuNB–PDMS hybrid film has great potential applications in the fast in situ monitoring of biochemical molecules.

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“…Graphene oxide is considered as one of the most reactive, high surface area two-dimensional (2D) material . However, graphene oxide (GO) also has some disadvantages such as high aggregation behavior and stack-forming. , To overcome all of the above drawbacks, a nanostructure with a high specific surface area and a highly reactive surface is an unmet demand. To the best of our knowledge, for the first time, we have developed a AuNRs@Cu 2 O-embedded reduced graphene oxide (rGO) composite for the removal of organic methylene blue.…”

Section: Introductionmentioning

confidence: 99%

“…28 However, graphene oxide (GO) also has some disadvantages such as high aggregation behavior and stack-forming. 29,30 To overcome all of the above drawbacks, a nanostructure with a high specific surface area and a highly reactive surface is an unmet demand.…”

Section: ■ Introductionmentioning

confidence: 99%

Well-Designed Au Nanorod-Doped Cu₂O Core–Shell Nanocube-Embedded Reduced Graphene Oxide Composite for Efficient Removal of a Water Pollutant Dye

et al. 2020

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To ensure environmental safety, the removal of organic pollutants has gained increasing attention globally. We have synthesized uniform Au nanorod (NR)-doped Cu 2 O core–shell nanocubes (CSNCs) via a seed-mediated route embedded on the surface of rGO sheets. The Au NRs@Cu 2 O/rGO nanocomposite was characterized using various techniques such as transmission electron microscopy (TEM), atomic force microscopy (AFM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Fourier-transform infrared (FT-IR) and Raman spectroscopies. The scanning TEM-energy-dispersive spectroscopy (STEM-EDS) elemental mapping of the AuNRs@Cu 2 O/rGO nanocomposite indicates that the Au NR (40 nm) is fully covered with the Cu 2 O particles (∼145 nm) as a shell. N 2 gas sorption analysis shows that the specific surface area of the composite is 205.5 m 2 /g with a mesoporous character. Moreover, incorporation of Au NRs@Cu 2 O CSNCs increases the nanogaps around the nanoparticles and suppresses the stacking/bundling of rGO, which significantly influences the pore size and increase the surface area. A batch adsorption experiment was carried out under various parameters, such as the effect of pH, contact time, temperature, initial dye concentration, and adsorbent dosage, for the removal of methylene blue (MB) in aqueous solution. The high surface area and mesoporosity can cause the adsorption capacity to reach equilibrium within 20 min with a 99.8% removal efficiency. Both kinetic and isotherm data were obtained and fitted very well with the pseudo-second-order kinetic and Langmuir isotherm model. The Langmuir isotherm revealed an excellent dye sorption capacity of 243.9 mg/g at 298 K. Moreover, after five adsorption cycles, the dye removal efficiency decreased from 99 to 86%. This novel route paves a new path for heterogeneous adsorbent synthesis, which is useful for catalysis and electrochemical applications.

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Environmental photochemistry by plasmonic semiconductor decorated GO nanocomposites: SERS detection and visible light driven degradation of aromatic dyes

Cited by 25 publications

References 28 publications

Effect of Graphene Nanoparticles Addition on Superconductivity of YBa2Cu3O7~δ Synthesized via the Thermal Treatment Method

Effect of Graphene Nanoparticles Addition on Superconductivity of YBa2Cu3O7~δ Synthesized via the Thermal Treatment Method

Contrastive Study of In Situ Sensing and Swabbing Detection Based on SERS-Active Gold Nanobush–PDMS Hybrid Film

Well-Designed Au Nanorod-Doped Cu₂O Core–Shell Nanocube-Embedded Reduced Graphene Oxide Composite for Efficient Removal of a Water Pollutant Dye

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Environmental photochemistry by plasmonic semiconductor decorated GO nanocomposites: SERS detection and visible light driven degradation of aromatic dyes

Cited by 25 publications

References 28 publications

Effect of Graphene Nanoparticles Addition on Superconductivity of YBa2Cu3O7~δ Synthesized via the Thermal Treatment Method

Effect of Graphene Nanoparticles Addition on Superconductivity of YBa2Cu3O7~δ Synthesized via the Thermal Treatment Method

Contrastive Study of In Situ Sensing and Swabbing Detection Based on SERS-Active Gold Nanobush–PDMS Hybrid Film

Well-Designed Au Nanorod-Doped Cu2O Core–Shell Nanocube-Embedded Reduced Graphene Oxide Composite for Efficient Removal of a Water Pollutant Dye

Contact Info

Product

Resources

About

Well-Designed Au Nanorod-Doped Cu₂O Core–Shell Nanocube-Embedded Reduced Graphene Oxide Composite for Efficient Removal of a Water Pollutant Dye