Eco-friendly fabrication of Au nanoparticles immobilized on tannin-aminopropyltriethoxysilane-coated halloysite nanotubes for thermally tunable catalysis

Ru, Yue; Wen, Xin; Mao, Yannan; Su, Yatao; Shen, Qi; Song, Hongzan; Zhang, Hailei; Ba, Xinwu

doi:10.1007/s10853-020-05208-y

Cited by 18 publications

(4 citation statements)

References 57 publications

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“…Three weight loss steps are found for the BCQD. The first one located in the temperature range of 100–400 °C is assigned to the oxidation of functional groups in the sample [ 35 ]. The second sharp process of weight loss between 400 and 600 °C is ascribed to the carbonization of skeletons in the BCQD [ 36 ].…”

Section: Resultsmentioning

confidence: 99%

Tannin–Mn coordination polymer coated carbon quantum dots nanocomposite for fluorescence and magnetic resonance bimodal imaging

Zhang

Zhou

et al. 2022

J Mater Sci: Mater Med

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The MR/FI bimodal imaging has attracted widely studied due to combining the advantages of MRI and FI can bridge gaps in sensitivity and depth between these two modalities. Herein, a novel MR/FI bimodal imaging probe is facile fabricated by coating the Mn-phenolic coordination polymer on the surface of the carbon quantum dots. The structure of the as-prepared nanocomposite probe is carefully validated via SEM, TEM, and XPS. The content of Mn2+ is calculated through the EDS and TGA. The quantum yield (QY) and emission wavelength of the probe are about 7.24% and 490 nm, respectively. The longitudinal r1 value (2.43 mM−1 s−1) with low r2/r1 (4.45) of the probe is obtained. Subsequently, fluorescence and MR imaging are performed. The metabolic pathways in vivo are inferred by studying the bio-distribution of the probe in major organs. Thus, these results indicate that probe would be an excellent dual-modal imaging probe for enhanced MR imaging and fluorescence imaging.

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Section: Resultsmentioning

confidence: 99%

Tannin–Mn coordination polymer coated carbon quantum dots nanocomposite for fluorescence and magnetic resonance bimodal imaging

Zhang

Zhou

et al. 2022

J Mater Sci: Mater Med

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“…The survey XPS spectrum of the pristine tannin gel (Figure 2A) indicates the presence of the elements carbon (C 1s, 285.1 eV) and oxygen (O 1s, 532.1 eV), which represent, together with hydrogen (non-detectable with the XPS technique), the chemical composition of tannins [43]. The deconvoluted C 1s spectrum of the pristine tannin aerogel (Figure 2D) reveals three main components at 284.4, 285.9, and 287.8 eV, which are associated with C=C, C-C/C-H/C-OH, and C=O/C-O, respectively [43][44][45][46][47]. The result matches the chemical structure of the pristine tannin, which features hydroxyl groups on its surface.…”

Section: Characterization Of Monolithic Tannin Gels and Their Functio...mentioning

confidence: 99%

Sustainable Tannin Gels for the Efficient Removal of Metal Ions and Organic Dyes

Koopmann,

Ehgartner,

Euchler

et al. 2023

Gels

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The usage of a highly efficient, low-cost, and sustainable adsorbent material as an industrial wastewater treatment technique is required. Herein, the usage of the novel, fully sustainable tannin-5-(hydroxymethyl)furfural (TH) aerogels, generated via a water-based sol–gel process, as compatible biosorbent materials is presented. In particular, this study focusses on the surface modification of the tannin biosorbent with carboxyl or amino functional groups, which, hence, alters the accessible adsorption sites, resulting in increased adsorption capacity, as well as investigating the optimal pH conditions for the adsorption process. Precisely, highest adsorption capacities are acquired for the metal cations and cationic dye in an alkaline aqueous environment using a carboxyl-functionalized tannin biosorbent, whereas the anionic dye requires an acidic environment using an amino-functionalized tannin biosorbent. Under these determined optimal conditions, the maximum monolayer adsorption capacity of the tannin biosorbent ensues in the following order: Cu2+ > RB > Zn2+ > MO, with 500, 244, 192, 131 mg g−1, respectively, indicating comparable or even superior adsorption capacities compared to conventional activated carbons or silica adsorbents. Thus, these functionalized, fully sustainable, inexpensive tannin biosorbent materials, that feature high porosity and high specific surface areas, are ideal industrial candidates for the versatile adsorption process from contaminated (heavy) metal or dye solutions.

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“…Recently, another thermoresponsive polymer tannin‐aminopropyltriethoxysilane was coated on the surface of halloysite nanotubes together with PNIPAM to immobilize Au nanoparticles. [ 81 ] These multicomponent systems with rigid nanostructures showed significant thermoresponsive catalytic performance in the reduction of 4‐nitrophenol, and the highest activity was acquired at the LCST of 45°C.…”

Section: Allosteric Catalysts Based On Single Moleculesmentioning

confidence: 99%

Rational design of allosteric switchable catalysts

et al. 2022

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Allosteric regulation, in many cases, involves switching the activities of natural enzymes, which further affects the enzymatic network and cell signaling in the living systems. The research on the construction of allosteric switchable catalysts has attracted broad interests, aiming to control the progress and asymmetry of catalytic reactions, expand the chemical biology toolbox, substitute unstable natural enzymes in the biological detection and biosensors, and fabricate the biomimetic cascade reactions. Thus, in this review, we summarize the recent outstanding works in switchable catalysts based on the allosterism of single molecules, supramolecular complexes, and self‐assemblies. The concept of allosterism was extended from natural proteins to polymers, organic molecules, and supramolecular systems. In terms of the difference between these building scaffolds, a variety of design methods that tailor biological and synthetic molecules into controllable catalysts were introduced with emphasis.

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Eco-friendly fabrication of Au nanoparticles immobilized on tannin-aminopropyltriethoxysilane-coated halloysite nanotubes for thermally tunable catalysis

Cited by 18 publications

References 57 publications

Tannin–Mn coordination polymer coated carbon quantum dots nanocomposite for fluorescence and magnetic resonance bimodal imaging

Tannin–Mn coordination polymer coated carbon quantum dots nanocomposite for fluorescence and magnetic resonance bimodal imaging

Sustainable Tannin Gels for the Efficient Removal of Metal Ions and Organic Dyes

Rational design of allosteric switchable catalysts

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