scholarly journals Adsorption of Hg(II) from aqueous solution using functionalized hydrogel loaded with hydrous manganese dioxide particles

2017 ◽  
Vol 76 (4) ◽  
pp. 747-753 ◽  
Author(s):  
Gong Yan ◽  
Su Philipp Oliver
Keyword(s):  
High Performance ◽  
Manganese Oxides ◽  
Adsorption Equilibrium ◽  
Three Dimensional ◽  
Infrared Analysis ◽  
The Novel ◽  
Composite Adsorbent ◽  
Dimensional Network ◽  
Optimum Ph ◽  
Pseudo Second Order

In this paper, a high performance adsorbent (hydrous manganese oxides onto acylamino and hydroxyl functionalized hydrogel) containing manganese oxide was prepared by the cross-linking polymer; the novel composite adsorbent has an excellent adsorption for Hg(II) removal. The adsorbent was characterized by scanning electron microscopy and Fourier transform infrared analysis, the hydrogel adsorbent had a typical three-dimensional network structure, and manganese oxides particles were dispersed into the channel and pores structure. The adsorption of Hg2+ in water was tested by using the adsorbent. The results show that the adsorption isotherms were fitted well with Langmuir model, and the maximum Hg2+ adsorption capacity was 0.654 mmol g−1 (131.2 mg g−1). The adsorption kinetics followed a pseudo-second-order equation, and the adsorption equilibrium can be reached in the first 120 min. The optimum pH of adsorption was determined to be 8.0. The desorption efficiency of 94% can be reached using 0.7 mol L−1 HCl as the regeneration agent. The results suggest that this material can be a promising adsorbent for Hg2+ removal in several industrial processes.

scholarly journals Evaluation of the Rheologic and Physicochemical Properties of a Novel Hyaluronic Acid Filler Range with eXcellent Three-Dimensional Reticulation (XTR™) Technology

Polymers ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1644
Author(s):  
Giovanni Salti ◽  
Salvatore Piero Fundarò
Keyword(s):  
Hyaluronic Acid ◽  
Research Laboratory ◽  
Three Dimensional ◽  
Size Distributions ◽  
The Novel ◽  
Independent Research ◽  
Aesthetic Medicine ◽  
Dimensional Network ◽  
Pore Size Distributions ◽  
Patient Profiles

Soft-tissue fillers made of hyaluronic acid and combined with lidocaine have recently become a popular tool in aesthetic medicine. Several manufacturers have developed their own proprietary formulae with varying manufacturing tools, concentrations, crosslinked three-dimensional network structures, pore size distributions of the fibrous networks, as well as cohesivity levels and rheological properties, lending fillers and filler ranges their unique properties and degradability profiles. One such range of hyaluronic acid fillers manufactured using the novel eXcellent three-dimensional reticulation (XTR™) technology was evaluated in comparison with other HA fillers and filler ranges by an independent research laboratory. Fillers manufactured with the XTR™ technology were shown to have characteristic rheological, crosslinking and biophysical factors that support the suitability of this filler range for certain patient profiles.

Low temperature growth of three-dimensional network of graphene for high-performance supercapacitor electrodes

2018 ◽  
Vol 218 ◽  
pp. 90-94 ◽  
Author(s):  
Li Zheng ◽  
Xinhong Cheng ◽  
Peiyi Ye ◽  
Lingyan Shen ◽  
Qian Wang ◽  
...  
Keyword(s):  
Low Temperature ◽  
High Performance ◽  
Three Dimensional ◽  
Temperature Growth ◽  
Low Temperature Growth ◽  
Dimensional Network

scholarly journals THE ADSORPTION OF Pb(II) AND Cr(III) BY POLYPROPYLCALIX[4]ARENE POLYMER

2010 ◽  
Vol 9 (3) ◽  
pp. 437-444 ◽  
Author(s):  
Suryadi Budi Utomo ◽  
Jumina Jumina ◽  
Tutik Dwi Wahyuningsih
Keyword(s):  
Metal Binding ◽  
Adsorption Equilibrium ◽  
Yellow Crystal ◽  
Maximum Adsorption Capacity ◽  
Adsorption Model ◽  
Heavy Metal Cations ◽  
Optimum Ph ◽  
Isotherm Adsorption ◽  
Pseudo Second Order ◽  
Relative Molecular Weight

A research has been conducted to investigate the adsorption behavior of Pb(II) and Cr(III) onto polypropylcalix[4]arene polymer. The polypropylcalix[4]arene polymer was synthesized in the presence of H2SO4 catalyst and chloroform under N2 condition for 5 h using 25-allyloxy-26,27,28-trihydroxycalyx[4]arene as the precursor. The Polymer was obtained as yellow crystal with melting point of  288-290 °C and its relative molecular weight was 44.810 g.mol-1. The application of polypropylcalix[4]arene for trapping heavy metal cations and its adsorption model were examined by stirring the suspension of the calixarene in the sample solutions for various pH, time, and concentration of Pb(II) and Cr(III) solution. Effect of pH on batch experiments for the mentioned ions indicated that the optimum pH for metal binding were 5 for lead(II) and chromium(III). The adsorption model of metal ions on polypropylcalix[4]arene followed both the pseudo second order adsorption of Ho's and Langmuir isotherm adsorption kinetics models with rate constant (k) were 6.81 x 101 min-1 for Pb(II) and 2.64 x 10-2 min-1 for Cr(III). The adsorption equilibrium constant, K, were 5.84 x 105 L.mol-1 for Pb(II) and 4.66 x 105 L.mol-1 for Cr(III). The maximum adsorption capacity of polypropylcalix[4]arene to Pb(II) and Cr(III) were 16.31 and 18.14 mg.g-1 with adsorption energy of 32.90 and 32.34 kJ.mol-1, respectively.   Keywords: polypropylcalix[4]arene, adsorption, Pb(II), and Cr(III)

Three-dimensional network-like amorphous NiCo-LDH nanofilms coupled with Co3O4 nanowires for high-performance supercapacitor

2019 ◽  
Vol 45 (17) ◽  
pp. 22095-22103
Author(s):  
Yuanyi Zhu ◽  
Shengli An ◽  
Jinlong Cui ◽  
Hengrui Qiu ◽  
Xuejiao Sun ◽  
...  
Keyword(s):  
High Performance ◽  
Three Dimensional ◽  
Dimensional Network

A flexible, lightweight and stretchable all-solid-state supercapacitor based on warp-knitted stainless-steel mesh for wearable electronics

2022 ◽  
pp. 004051752110698
Author(s):  
Chuanli Su ◽  
Guangwei Shao ◽  
Qinghua Yu ◽  
Yaoli Huang ◽  
Jinhua Jiang ◽  
...  
Keyword(s):  
Stainless Steel ◽  
High Performance ◽  
Light Emitting Diode ◽  
Low Cost ◽  
Three Dimensional ◽  
Rate Capability ◽  
Cycling Stability ◽  
Wearable Electronics ◽  
Light Emitting ◽  
Dimensional Network

Highly conductive, flexible, stretchable and lightweight electrode substrates are essential to meet the future demand on supercapacitors for wearable electronics. However, it is difficult to achieve the above characteristics simultaneously. In this study, ultrafine stainless-steel fibers (with a diameter of ≈30 μm) are knitted into stainless-steel meshes (SSMs) with a diamond structure for the fabrication of textile stretchable electrodes and current collectors. The electrodes are fabricated by utilizing an electrodeposited three-dimensional network graphene framework and poly(3,4-ethylenedioxythiophene) (PEDOT) coating on the SSM substrates via a two-step electrodeposition process, which show a specific capacitance of 77.09 F g−1 (0.14 A g−1) and superb cycling stability (91% capacitance retention after 5000 cycles). Furthermore, the assembled flexible stretchable supercapacitor based on the PEDOT/reduced graphene oxide (RGO)@SSM electrodes exhibits an areal capacitance (53 mF cm−2 at 0.1 mA cm−2), a good cycling stability (≈73% capacitance retention after 5000 cycles), rate capability (36 mF cm−2 at 5 mA cm−2), stretchable stability (≈78% capacitance retention at 10% strain for 500 stretching cycles) and outstanding flexibility and stability under various bending deformations. The assembled supercapacitors can illuminate a thermometer and a light-emitting diode, demonstrating their potential application as stretchable supercapacitors. This simple and low-cost method developed for fabricating lightweight, stretchable and stable high-performance supercapacitors offers new opportunities for future stretchable electronic devices.

scholarly journals Effective removal of Pb2+ from oral medical wastewater via an activated three-dimensional framework carbon (3D AFC)

2021 ◽  
Vol 11 (9) ◽  
Author(s):  
Fuxiang Song ◽  
Na Wang ◽  
Zezhou Hu ◽  
Zhen Zhang ◽  
Xiaoxue Mai ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Three Dimensional ◽  
High Specific Surface Area ◽  
Maximum Adsorption Capacity ◽  
Freundlich Model ◽  
Dimensional Network ◽  
Effective Removal ◽  
Strong Adsorption ◽  
Pseudo Second Order ◽  
Main Material

AbstractOral medical wastewater with heavy metal ions (such as plumbum, Pb2+) is regarded as the main pollutant produced in the oral cavity diagnosis, and the treatment process can pose a serious threat to human health. The removal of Pb2+ from oral medical wastewater facing major difficulties and challenges. Therefore, it is of great significance to take effective measures to remove Pb2+ by using effective methods. A new activated three-dimensional framework carbon (3D AFC), regarded as the main material to remove Pb2+ in the oral medical wastewater, has been fabricated successfully. In this experiment, the effects of 3D AFC absorbing Pb2+ under different conditions (including solid-to-liquid ratio, pH, ionic strength, contact time, and initial concentration, etc.) were discussed. And the result revealed that the adsorption kinetics process of Pb2+ on 3D AFC conformed to the pseudo-second-order model and the adsorption isotherm conformed to the Freundlich model. Under the condition that pH = 5.5 and T = 298 k, the calculated maximum adsorption capacity of 3D AFC for Pb2+ was 270.88 mg/g. In practical application, it has strong adsorption ability for Pb2+ in oral medical wastewater. Thus, 3D AFC shows promise for Pb2+ remove and recovery applications because of high adsorption capacity for Pb2+ in oral medical wastewater due to its high specific surface area, outstanding three-dimensional network structure.

Gel Engineering Materials Meso-Decorated with Polymorphic Crystals

2013 ◽  
Vol 746 ◽  
pp. 325-329 ◽  
Author(s):  
Jin Gong ◽  
Susumu Igarashi ◽  
Kensuke Sawamura ◽  
Masato Makino ◽  
M. Hasnat Kabir ◽  
...  
Keyword(s):  
High Performance ◽  
Daily Life ◽  
Three Dimensional ◽  
High Strength ◽  
Structure Design ◽  
High Permeability ◽  
Polymorphic Crystals ◽  
Dimensional Network ◽  
New Material ◽  
Rigid Rod

Gels are a new material having three-dimensional network structures of macromolecules. They possess excellent properties as swellability, high permeability and biocompatibility, and have been applied in various fields of daily life, food, medicine, architecture, and chemistry. In this study, we tried to prepare new multi-functional and high-strength gels by using Meso-Decoration (Meso-Deco), one new method of structure design at intermediate mesoscale. High-performance rigid-rod aromatic polymorphic crystals. The strengthening of gels can be realized by meso-decorating the gels structure using high-performance polymorphic crystals. New gels with good mechanical properties, novel optical properties and thermal properties are expected to be developed.

A high-performance asymmetric supercapacitor designed with a three-dimensional interconnected porous carbon framework and sphere-like nickel nitride nanosheets

2019 ◽  
Vol 43 (32) ◽  
pp. 12623-12629 ◽  
Author(s):  
Hui Peng ◽  
Xiuwen Dai ◽  
Kanjun Sun ◽  
Xuan Xie ◽  
Fei Wang ◽  
...  
Keyword(s):  
Porous Carbon ◽  
High Performance ◽  
Aqueous Electrolyte ◽  
Three Dimensional ◽  
Negative Electrode ◽  
Positive Electrode ◽  
Asymmetric Supercapacitor ◽  
The Novel ◽  
Carbon Framework ◽  
Nickel Nitride

The novel asymmetric supercapacitor was assembled based on a three-dimensional (3D) interconnected porous carbon framework as the negative electrode and 3D sphere-like nickel nitride nanosheets as the positive electrode in aqueous electrolyte.

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