Hydrothermal fabrication of novel three-dimensional graphene oxide-pentaerythritol composites with abundant oxygen-containing groups as efficient adsorbents

Publication date: Available online 15 October 2019Source: Microchemical JournalAuthor(s): Cong Liao, Xiao-Ru Zhao, Xin-Yu Jiang, Jie Teng, Jin-Gang YuAbstractThree-dimensional (3D) graphene oxide-pentaerythritol (GO-PER) composites with abundant oxygen-containing functional groups (such as carboxyl, hydroxyl, carbonyl, epoxy) were successfully prepared by a hydrothermal self-assembly method. The enrichment performances of GO-PER composites for rare earth elements (REEs) and phenols were investigated by batch adsorption experiments. The adsorption of REEs and phenols could reach equilibrium in 30 min and 60 min at room temperature, respectively. Furthermore, GO-PER composites exhibited excellent pH stability. The adsorption capacities of GO-PER composites were 27.92, 30.44, 43.2, 48.08 and 52.4 mg•g−1 for La3+, Y3+, Nd3+, Er3+ and Yb3+, respectively. The adsorption capacities of GO-PER composites for phenols including 3-nitrophenol, hydroquinone and tert-butylphenol (TBHQ) were 61.1, 42.35 and 29.76 mg•g−1, respectively. Scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller (BET) specific surface area (SSA) analysis and Zeta potential analysis were used to characterize the physicochemical properties of the samples and propose the adsorption mechanism. The adsorption of REEs by GO-PER composites might be due to electrostatic attraction and surface comp...
Source: Microchemical Journal - Category: Chemistry Source Type: research

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ConclusionPET/CT-guided molecular biopsy using Ga-68 labelled radiotracers is feasible and can be performed safely and accurately with a high-diagnostic yield. It is helpful in accurately staging the disease when tracer-avid isolated distant lesion evident on imaging and highly practical in patients with previous inconclusive sampling.
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Publication date: Available online 10 November 2019Source: Materials Today CommunicationsAuthor(s): Monika Sobiech, Dorota Maciejewska, Piotr LulińskiAbstractIn this paper, poly(methacrylic acid-co-trimethylolpropane trimethacrylate) imprinted sorbent was constructed from equimolar amounts of cross-linker and selected ethylammonium methacrylates which were synthesized from respective ethylamines with very good yields (80-97%) prior to polymerization. The structure of resulted polymers was characterized by spectroscopy and thermogravimetry and the morphology was examined by scanning electron microscopy and porosity analyse...
Source: Materials Today Communications - Category: Materials Science Source Type: research
This study investigated the dose response and stability of dose-rate independent silicone-based radiochromic dosimeters (FlexyDos3D), which exhibit substantial potential in fabricating deformable anthropomorphic phantoms for radiotherapy dosimetry. The dose response induced optical absorption changes and stability were investigated using two readout modalities: a UV-VIS spectrophotometer and a flatbed scanner. The absorption spectral measurement in the visible wavelength of 400 nm - 700 nm showed a principle absorption peak at 626 nm, a secondary peak at 424 nm and a valley area with minimal absorption in between a...
Source: Radiation Physics and Chemistry - Category: Physics Source Type: research
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Source: Fight Aging! - Category: Research Authors: Tags: Daily News Source Type: blogs
Publication date: Available online 9 November 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Kanjana Kunpatee, Phuktra Chamsai, Eda Mehmeti, Dalibor M. Stankovic, Astrid Ortner, Kurt Kalcher, Anchalee SamphaoAbstractA sensitive and rapid method for the determination of fenobucarb by using screen-printed carbon electrode modified with graphene nanoribbons - ionic liquid - cobalt phthalocyanine (GNRs-IL-CoPc/SPCE) composites based on flow injection analysis (FIA) was developed and applied to vegetable samples. The prepared GNRs-IL-CoPc composite was characterized by Fourier transform infrared spectroscopy (FT-I...
Source: Journal of Electroanalytical Chemistry - Category: Chemistry Source Type: research
In this study, 2 mol% Co(NO3)2•6H2O was used as the sintering aid, GDC interlayers with 2 mol% Co(NO3)2•6H2O (Co-GDC) were sintered at 1150 °C, 1200 °C, 1250 °C and 1350 °C, respectively. The Co-GDC interlayer sintered at 1150 °C was porous, but only closed pores existed when the Co-GDC interlayers were sintering above 1250 °C. The initial ohmic resistances of the cells with Co-GDC interlayers sintered at 1150 °C, 1250 °C and 1350 °C were 0.259, 0.266 and 0.299 Ω cm2. After the cells running for 100 h, the ohmic resistances were 0.289, 0.262 an...
Source: Journal of Electroanalytical Chemistry - Category: Chemistry Source Type: research
Publication date: Available online 9 November 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Zhijing Fu, Zhengyi Qu, Tian Yu, Lihua BiAbstractWe developed a novel way to construct the multifunctional composite films with luminescence and redox properties in this study. Firstly, the luminescent molecule HOPTS (8-hydroxypyene-1,3,6-trisulfonic acid trisodium salt) was incorporated into the silica spheres to form the green emission silica materials, HOPTS@SiO2, that were characterized by SEM (scanning electron microscope), FTIR (fourier transform infrared spectroscopy) and luminescence spectroscopy to verify the...
Source: Journal of Electroanalytical Chemistry - Category: Chemistry Source Type: research
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Source: Materials Today: Proceedings - Category: Materials Science Source Type: research
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Source: Materials Today: Proceedings - Category: Materials Science Source Type: research
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Source: Materials Science and Engineering: C - Category: Materials Science Source Type: research
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