High performance graphene oxide nanofiltration membrane prepared by electrospraying for wastewater purification

Chen, Long; Moon, Jung-Hyeon; Ma, Xiaodong; Zhang, Lin; Chen, Qiong; Chen, Lina; Peng, Ruiqin; Si, Pengchao; Feng, Jinkui; Li, Yanhui; Lou, Jun; Ci, Lijie

doi:10.1016/j.carbon.2018.01.062

Cited by 147 publications

(43 citation statements)

References 45 publications

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“…More importantly, large‐area lamellar membrane (≈720 cm 2 , 22 cm × 33 cm) is readily obtained with no cracks (Figure S11, Supporting Information). This should be the largest GO‐based membrane reported in literatures to date . However, membrane size and fabrication efficiency are governed by the receiver size and amount of nozzle, respectively.…”

Section: Resultsmentioning

confidence: 97%

Beetle‐Inspired Assembly of Heterostructured Lamellar Membranes with Polymer Cluster–Patterned Surface for Enhanced Molecular Permeation

Wang

Yuan

et al. 2019

Adv Funct Materials

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2D lamellar membranes hold great promise in efficient molecular separations of liquid and gas mixtures. However, the simultaneous realization of high permeation and precise sieving (i.e., overcoming the permeation-rejection tradeoff ) of membranes poses a great challenge. Inspired by the structures and functions of the beetle's back, the heterostructured lamellar membranes fabricated through facile and controllable electrostatic atomization method are reported. Particularly, hydrophobic polymer clusters are patterned on hydrophilic laminate (graphene oxide) surfaces to realize the hydrophilic/hydrophobic heterostructure. It shows that the fast dissolution for nonpolar solvents is achieved by the strong affinity polymer clusters, and the ultralow-barrier diffusion is achieved by the weak affinity laminate channels. Therefore, the permeance is remarkably enhanced (over 7 times for nonpolar solvents), while fully retaining membrane rejection. In contrast, hydrophilic clusters are patterned on hydrophobic laminate (reduced graphene oxide) surfaces and exhibit similar behaviors toward polar solvents. Furthermore, the lamellar membrane displays highly ordered layer-by-layer stacking, affording precise molecular rejection. Besides, the lamellar membrane acquires lower thermodynamic energy and hence superior stability under ultrasonic and strong acid or alkali environments, manifesting great potential for long-term practical operation.

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Section: Resultsmentioning

confidence: 97%

Beetle‐Inspired Assembly of Heterostructured Lamellar Membranes with Polymer Cluster–Patterned Surface for Enhanced Molecular Permeation

Wang

Yuan

et al. 2019

Adv Funct Materials

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“…Only the coeffi cient of determination is not enough to correctly assess the suitability of the mathematical model to describe the experimental data, so another better criterion for the assessment of experimental isotherm data, a parameter known as average relative error, was used to evaluate the goodness-of-fi t of a model to data. The average relative error P is given by the following equation: (6) where q e,exp (mg/g) is the experimental q e at various C e , q e,cal (mg/g) is the corresponding calculated q e according to the equation under study with the best fi tted parameters, and N is the number of observations. It is generally accepted that when the P value is less than 5, the fi tting is considered to be excellent 48 .…”

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confidence: 99%

Adsorption of Congo Red from Aqueous Solutions by Porous Soybean Curd Xerogels

Zhao

et al. 2018

Polish Journal of Chemical Technology

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Soybean curd is a very popular food containing high-quality protein, polyunsaturated fats, vitamins, minerals and other nutrients. This study aims to prepare porous soybean curd xerogels via a vacuum freeze drying method and uses them as adsorbents to remove congo red from aqueous solutions. The morphology and functional groups of the soybean curd xerogels were characterized using scanning electron microscopy and Fourier transform infrared spectroscopy, respectively. The adsorption properties of congo red onto the soybean curd xerogels were carried out through investigating the infl uencing experimental parameters such as the drying method, solution pH, adsorbent dose, contact time and temperature. The results showed that the adsorption isotherm data were fitted well to the Freundlich isotherm. Adsorption kinetics of congo red onto the soybean curd followed the pseudo-second-order kinetic model. The thermodynamic parameters, such as ΔG0, ΔH0 and ΔS0, were also determined.

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“…When conducting research on composite membranes, it was observed that the anionic surfactants were well separated, at the same time influencing the improvement of flux parameters on GO/PAN membranes. The observed phenomenon may result from the negative charge of composite membranes, which was described in our previous paper [20] and in the work of Chen et al [25]. However, in the case of nonionic surfactant studies, it was observed that on the GO/PAN membranes the permeate flux decreased and the separation properties deteriorated.…”

Section: Resultsmentioning

confidence: 54%

The application of composite GO/PAN membranes for removing surfactants from laundry wastewater

Fryczkowska¹,

Przywara²

2019

DWT

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The paper presents the results of research on the use of ultrafiltration composite graphene oxide/ polyacrylonitrile (GO/PAN) membranes (containing 0.8% (membrane A), 4.0% (membrane B), and 7.7% (membrane C) w/w of GO in PAN matrix) for removing surfactants from synthetic sewage and real laundry wastewater (LWW). For the preparation of synthetic sewage, anionic surfactants (dodecylbenzenesulfonic acid (DBSA), white sodium soap (SS)) and nonionic surfactants (Triton X-100, Mulan Citro) were selected. Real wastewater came from two different laundries, which used a mixture of nonionic and anionic surfactants (LWW 1) and only nonionic surfactants (LWW 2) in the washing process. The research demonstrated that anionic surfactants positively influenced the functionality of the membranes, increasing the volumetric permeate flux, which for DBSA was ~418 L m-2 h-1 (membrane A), ~212 L m-2 h-1 (membrane B), and ~245 L m-2 h-1 (membrane C) and had slightly lower values for SS. The GO/PAN composite membranes are characterized by a rejection rate of 100% for SS and more than 90% for DBSA and therefore can be used to remove anionic surfactants of LWW 1 (R = 90%-99%).

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High performance graphene oxide nanofiltration membrane prepared by electrospraying for wastewater purification

Cited by 147 publications

References 45 publications

Beetle‐Inspired Assembly of Heterostructured Lamellar Membranes with Polymer Cluster–Patterned Surface for Enhanced Molecular Permeation

Beetle‐Inspired Assembly of Heterostructured Lamellar Membranes with Polymer Cluster–Patterned Surface for Enhanced Molecular Permeation

Adsorption of Congo Red from Aqueous Solutions by Porous Soybean Curd Xerogels

The application of composite GO/PAN membranes for removing surfactants from laundry wastewater

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