Graphene oxide modified cellulose nanocrystal/PNIPAAm IPN hydrogel for adsorption of Congo red and methylene blue

2021 ◽  
Author(s):  
Lijuan Zhang ◽  
Dongqing Zhao ◽  
Yao Lu ◽  
Jinghan Chen ◽  
Haotian Li ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Graphene Oxide ◽  
Congo Red ◽  
Cellulose Nanocrystal ◽  
Anionic Dyes ◽  
Efficient Strategy ◽  
Highly Efficient ◽  
Modified Cellulose

A highly efficient strategy was developed to fabricate graphene oxide modified cellulose nanocrystal/PNIPAAm IPN (GO-CNC/PNIPAAm IPN) hydrogel, which was capable of effectively adsorbing cationic and anionic dyes. The adsorption of...

Fe3O4/TiO2/reduced graphene oxide composites as highly efficient Fenton-like catalyst for the decoloration of methylene blue

2019 ◽  
Vol 223 ◽  
pp. 751-757 ◽  
Author(s):  
Chao Sun ◽  
Sheng-Tao Yang ◽  
Zhenjie Gao ◽  
Shengnan Yang ◽  
Ailimire Yilihamu ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Highly Efficient ◽  
Reduced Graphene ◽  
Oxide Composites

scholarly journals Novel Al2O3/GO/halloysite nanotube composite for sequestration of anionic and cationic dyes

RSC Advances ◽  
2019 ◽  
Vol 9 (24) ◽  
pp. 13916-13926 ◽  
Author(s):  
M. A. Barakat ◽  
Rajeev Kumar ◽  
M. Balkhyour ◽  
Md. Abu Taleb
Keyword(s):  
Methylene Blue ◽  
Graphene Oxide ◽  
Congo Red ◽  
Cationic Dyes ◽  
Halloysite Nanotube

In this study, an Al2O3/graphene oxide/halloysite nanotube (Al2O3/GO/HNT) nanocomposite has been synthesized and used as an adsorbent for the sequestration of cationic methylene blue (MB) and anionic congo red (CR) dyes from wastewater.

scholarly journals Ultra-Highly Efficient Removal of Methylene Blue Based on Graphene Oxide/TiO2/Bentonite Sponge

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 824
Author(s):  
Yuan Liu ◽  
Luyan Wang ◽  
Ni Xue ◽  
Pengxiang Wang ◽  
Meishan Pei ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Graphene Oxide ◽  
Removal Rate ◽  
Cost Effective ◽  
Electron Hole ◽  
Efficient Treatment ◽  
Highly Efficient ◽  
Removal Capacity ◽  
Sensitivity Range

An ultra-highly efficient Graphene Oxide/TiO2/Bentonite (GO/TiO2/Bent) sponge was synthesized using an in situ hydrothermal method. GO/TiO2/Bent sponge with a GO mass concentration of 10% exhibited the highest treatment efficiency of methylene blue (MB), combining adsorption and photocatalytic degradation, and achieved a maximum removal efficiency of 100% within about 70 min. To further prove the ultra-high removal capacity of the sponge, the concentration of MB in water increased to ten times the original concentration. At so high a MB concentration, the removal rate was still as high as 80% in 90 min. The photocatalytic mechanism of GO/TiO2/Bent sponge was discussed through XPS, PL and radicals quenching experiments. Here Bent can immobilize TiO2 and react with a photo-generated hole to increase the amount of hydroxyl radical; effectively enhancing the degradation of MB.GO sponge enlarges the sensitivity range of TiO2 to visible light by increasing the charge separation of TiO2 and reducing the recombination of photo-generated electron–hole pairs. Additionally, GO sponge with an interconnected porous structure provides an effective platform to immobilize TiO2/bent and makes them be easily recovered. The as-prepared sponge develops a simple and cost-effective strategy to realize the ultra-highly efficient treatment of dyes in wastewater.

scholarly journals Preparation and characterization of Fe3O4/gallic acid/graphene oxide magnetic nanocomposites as highly efficient Fenton catalysts

RSC Advances ◽  
2017 ◽  
Vol 7 (46) ◽  
pp. 28979-28986 ◽  
Author(s):  
Yani Hua ◽  
Sha Wang ◽  
Juan Xiao ◽  
Chang Cui ◽  
Chuan Wang
Keyword(s):  
Methylene Blue ◽  
Graphene Oxide ◽  
Gallic Acid ◽  
Magnetic Nanocomposites ◽  
Heterogeneous Fenton ◽  
Highly Efficient

In this study, Fe3O4/gallic acid/graphene oxide magnetic nanocomposites (Fe3O4/GA/GO MNPs) were synthesized as heterogeneous Fenton catalysts to activate H2O2 to degrade methylene blue (MB).

Highly Monodisperse Pt/Rh Nanoparticles Confined in the Graphene Oxide for Highly Efficient and Reusable Sorbents for Methylene Blue Removal from Aqueous Solutions

2017 ◽  
Vol 2 (2) ◽  
pp. 697-701 ◽  
Author(s):  
Yunus Yildiz ◽  
Tugba Onal Okyay ◽  
Betül Sen ◽  
Bahdisen Gezer ◽  
Sultan Kuzu ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Graphene Oxide ◽  
Aqueous Solutions ◽  
Highly Efficient ◽  
Methylene Blue Removal

scholarly journals Grafting of Acrylic Membrane Prepared from Fibers Waste for Dyes Removal: Methylene Blue and Congo Red

Separations ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 42
Author(s):  
Ahmed Labena ◽  
Ahmed E. Abdelhamid ◽  
Shimaa Husien ◽  
Tarek Youssef ◽  
Ehab Azab ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Congo Red ◽  
Kinetic Studies ◽  
Anionic Dyes ◽  
Acrylic Fiber ◽  
Freundlich Isotherms ◽  
Chemical Grafting ◽  
Full Factorial ◽  
Harmful Effects ◽  
Acrylic Fibers

Dyes are a type of pollutant that have been discharged into water streams by various industries and had harmful effects on the environment and human health. Therefore, present work was directed to recycle acrylic fibers waste to be used as an adsorbent to exclude dyes such as methylene blue (MB) and Congo red (CR) from dyes-polluted wastewater. Acrylic fibers waste was converted into membrane followed by chemical grafting with p-phenylenediamine monomer to form functional modified membranes. Afterwards, some characterization analyses; Fourier transform-infrared, scanning electron microscope, swelling behavior, and porosity properties were performed for the acrylic fiber grafted membrane (AFGM). For obtaining the best conditions that permit the highest adsorption capacity of the AFGM, some preliminary experiments followed by general full factorial design experiments were displayed. Langmuir, Freundlich isotherms and kinetic studies evaluations were applied. Results revealed that, the adsorption capacities of the AFGM were 61% for Methylene blue and 86% for Congo red that stated the high affinity of the AFGM to the anionic dyes. The reusability of the AFGM membranes in different cycles for 3Rs processes “Removal, Recovery, and Re-use” indicated the efficiency of the AFGM to be used in wastewater treatment.

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