A sustainable approach to fabricate new 1D and 2D nanomaterials from natural abundant palygorskite clay for antibacterial and adsorption

Dong, Wei; Lu, Yushen; Wang, Wenbo; Zhang, Mingming; Jing, Yanmei; Wang, Aiqin

doi:10.1016/j.cej.2019.122984

Cited by 88 publications

(31 citation statements)

References 60 publications

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“…The three absorption bands were observed at 1360, 855, and 673 cm −1 , which could be ascribed to the asymmetric and symmetric stretch of interlayer carbonates [48,49]. The characteristic bands observed at 983, 780, 554, and 449 cm −1 were attributed to the translation, deformation, and vibration modes of the metal hydroxide sheets, respectively [46,[49][50][51][52]. The spectrum indicated that the OH stretch in pristine lutein pigments appeared at 3421 cm −1 .…”

Section: Characterization Of Lutein/ldh Compositesmentioning

confidence: 93%

“…Lutein was recrystallized with mixed solvent of tetrahydrofuran and water (v/v, 1:4) to raise the purity to 95% (HPLC analysis). The synthesis of Mg-Al-Fe LDH is conducted according to the methodology described by Dong et al [50], and the main chemical compositions of LDH included Al 2 O 3 15.37%, Na 2 O 3.34%, CaO 6.98%, MgO 35.23% and Fe 2 O 3 10.85%. Typically, 4 g of palygorskite (Dimaitong mine located in Linze county of Gansu Province of China) with a 200-mesh sieve was mixed with 80 mL of 1 mol/L sulfuric acid and stirred to form a homogeneous dispersion.The above dispersion was transferred into the reaction kettleafter being ultrasonically treated for 30 min, and then the mixture was hydrothermally treated at 180 • C for 12 h to collect liquid.…”

Section: Methodsmentioning

confidence: 99%

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Incorporation of Lutein on Layered Double Hydroxide for Improving the Environmental Stability

Shue

Dong

et al. 2020

Molecules

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To overcome the poor stability of natural lutein to environmental factors, layered double hydroxide was incorporated by a green mechanical grinding process. The influences of external factors (chemical reagents, heating and light) on the stability of lutein before and after being loaded were evaluated. The results confirmed that lutein was mainly adsorbed on the surface of layered double hydroxide (LDH) via the chemical interaction. Compared with pure lutein, the thermal decomposition of lutein/LDH was improved from 100 °C to 300 °C, and the retention ratio of lutein was increased by about 8.64% and 21.47% after 96 h of light exposure and accelerated degradation, respectively. It is expected that the stable lutein/LDH composites may constitutean additive in animal feed.

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Section: Characterization Of Lutein/ldh Compositesmentioning

confidence: 93%

Section: Methodsmentioning

confidence: 99%

Incorporation of Lutein on Layered Double Hydroxide for Improving the Environmental Stability

Shue

Dong

et al. 2020

Molecules

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“…25,26 ATP also has a special crystal structure, stacking mode and nanometric dimension, which endows it with plentiful pores, higher aspect ratio, better ion-exchange capacity and affluent surface group, and enables it to be a candidate to fabricate various biological scaffolds. 25,[27][28][29][30] Furthermore, ATP possesses special nanoscale structure and microporeforming capability, which indicates that ATP is suitable for osteoblast ingrowth and neovascularization. 31,32 ATP nanorods could form colloidal network structure with high viscosity due to the interaction among rods, and also form physical entanglement with other polymer chains to form stable blend.…”

Section: Introductionmentioning

confidence: 99%

<p>A Novel 3D-bioprinted Porous Nano Attapulgite Scaffolds with Good Performance for Bone Regeneration</p>

Wang

Hui

Zhao

et al. 2020

IJN

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Background: Natural clay nanomaterials are an emerging class of biomaterial with great potential for tissue engineering and regenerative medicine applications, most notably for osteogenesis. Materials and Methods: Herein, for the first time, novel tissue engineering scaffolds were prepared by 3D bioprinter using nontoxic and bioactive natural attapulgite (ATP) nanorods as starting materials, with polyvinyl alcohol as binder, and then sintered to obtain final scaffolds. The microscopic morphology and structure of ATP particles and scaffolds were observed by transmission electron microscope and scanning electron microscope. In vitro biocompatibility and osteogenesis with osteogenic precursor cell (hBMSCs) were assayed using MTT method, Live/Dead cell staining, alizarin red staining and RT-PCR. In vivo bone regeneration was evaluated with micro-CT and histology analysis in rat cranium defect model. Results: We successfully printed a novel porous nano-ATP scaffold designed with inner channels with a dimension of 500 µm and wall structures with a thickness of 330 µm. The porosity of current 3D-printed scaffolds ranges from 75% to 82% and the longitudinal compressive strength was up to 4.32±0.52 MPa. We found firstly that nano-ATP scaffolds with excellent biocompatibility for hBMSCscould upregulate the expression of osteogenesisrelated genes bmp2 and runx2 and calcium deposits in vitro. Interestingly, micro-CT and histology analysis revealed abundant newly formed bone was observed along the defect margin, even above and within the 3D bioprinted porous ATP scaffolds in a rat cranial defect model. Furthermore, histology analysis demonstrated that bone was formed directly following a process similar to membranous ossification without any intermediate cartilage formation and that many newly formed blood vessels are within the pores of 3D-printed scaffolds at four and eight weeks. Conclusion: These results suggest that the 3D-printed porous nano-ATP scaffolds are promising candidates for bone tissue engineering by osteogenesis and angiogenesis.

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“…Attapulgite (ATP), also known as palygorskite, is a crystalline hydrated magnesium aluminum silicate mineral with a nanofiber‐like structure 13,14 . It has a large surface area, moderate cation exchange capacity, and a large number of Si‐OH groups on its surface, thus exhibiting excellent reactivity in dealcoholization of methoxy or active silanol groups (Si–OH, alkoxysilane is hydrolyzed to generate active silanol intermediates) in alkoxysilane 15,16 . For instance, Zhou et al 17 designed polyamidoamine dendrimer‐functionalized palygorskite (Pal‐PAMAM) to remove Pb 2+ and Reactive Red 3BS dyes.…”

Section: Introductionmentioning

confidence: 99%

Adsorption behaviors and mechanism of heavy metals onto attapulgite functionalized by polyamine silane

et al. 2020

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Pollution from heavy‐metal ions has become a major challenge to the global fight against environmental pollution. Given the availability of various low‐cost and environmentally friendly adsorbents, adsorption has become the most efficient technology for the removal of heavy metals from water. In this study, attapulgite (ATP) was directly functionalized by coupling with an aminosilane agent. Analysis showed this maneuver provided a suitable adsorbent for the removal of lead ion (Pb2+) from an aqueous solution. The effects of several parameters including solution pH, contacting time, adsorbent dosage, and initial Pb2+ ion concentration were investigated. Batch sorption results showed that the adsorption process was rapid and over 98% of Pb2+ was removed within 30 min at the optimal pH 4.0. The maximum adsorption capacity at 25°C, calculated by the Langmuir isotherm, was 82.17, 78.80, 61.13, and 28.56 mg/g for γ‐divinyltriaminepropyl‐methyldimethoxylsilane‐grafted attapulgite (KH‐103‐ATP), γ‐aminopropyl‐methyldiethoxysilane‐grafted attapulgite (KH‐912‐ATP), N‐(β‐aminoethyl‐γ‐aminopropyl)‐methyl‐dimethoxysilane‐grafted attapulgite (KH‐602‐ATP), and ATP, respectively. Moreover, molecular dynamics simulations of adsorption behaviors of heavy‐metal ions at attapulgite surfaces (010) modified by aminosilane agents were carried out. Both the PMF value and diffusion coefficient of metal ions suggest that KH‐103‐ATP owns the highest rate constant and capacity compared with the other two. And the analysis of free energy and results of XPS characterization revealed that Pb2+ formed covalent bonds with the nitrogen atom of aminosilane agents.

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A sustainable approach to fabricate new 1D and 2D nanomaterials from natural abundant palygorskite clay for antibacterial and adsorption

Cited by 88 publications

References 60 publications

Incorporation of Lutein on Layered Double Hydroxide for Improving the Environmental Stability

Incorporation of Lutein on Layered Double Hydroxide for Improving the Environmental Stability

<p>A Novel 3D-bioprinted Porous Nano Attapulgite Scaffolds with Good Performance for Bone Regeneration</p>

Adsorption behaviors and mechanism of heavy metals onto attapulgite functionalized by polyamine silane

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