Application of palladium nanoparticle‐decorated Artemisia abrotanum extract‐modified graphene oxide for highly active catalytic reduction of methylene blue, methyl orange and rhodamine B

2019 ◽  
Vol 33 (10) ◽  
Author(s):  
Mirmehdi Hashemi Salehi ◽  
Mohammad Yousefi ◽  
Malak Hekmati ◽  
Ebrahim Balali
Keyword(s):  
Methylene Blue ◽  
Graphene Oxide ◽  
Methyl Orange ◽  
Rhodamine B ◽  
Catalytic Reduction ◽  
Palladium Nanoparticle ◽  
Highly Active ◽  
Modified Graphene Oxide ◽  
Modified Graphene ◽  
Artemisia Abrotanum

Efficient and Enhanced Adsorption of Methylene Blue on Triethanolamine-Modified Graphene Oxide

2019 ◽  
Vol 64 (4) ◽  
pp. 1816-1825 ◽  
Author(s):  
Jun Xu ◽  
Sisi Li ◽  
Feng Wang ◽  
Zhouxiaoshuang Yang ◽  
Hui Liu
Keyword(s):  
Methylene Blue ◽  
Graphene Oxide ◽  
Modified Graphene Oxide ◽  
Enhanced Adsorption ◽  
Modified Graphene

scholarly journals Preparation of Graphene Oxide Sand Composites as Super Adsorbent for Water Purification Application

2018 ◽  
Vol 156 ◽  
pp. 05019 ◽  
Author(s):  
Eko Andrijanto ◽  
Gatot Subiyanto ◽  
Nina Marlina ◽  
Hanifa Citra ◽  
Cahya Lintang
Keyword(s):  
Methylene Blue ◽  
Graphene Oxide ◽  
Methyl Orange ◽  
Water Purification ◽  
Rhodamine B ◽  
Solution Method ◽  
Color Removal ◽  
Contaminated Water ◽  
Graphene Oxides ◽  
Xrd Diffraction

This paper describes a method to synthesize a graphene oxide sand composites (GSC) as filter media (absorbent) for water purification. Graphene oxides is synthesized from graphite using modification of Hummer's method. The graphene oxide sand composites is prepared through solution method at 100 °C. The graphene oxide is analyzed using XRD, FTIR to confirm its formation. The FTIR spectrum and XRD diffraction pattern confirmed that the graphene oxide synthesized by this method is able to convert graphite into graphene oxide. Performance tests were conducted using a column to purify contaminated water which was mimicked using dyes such as rhodamine B, methylene blue and methyl orange.The initial concentration for all dyes were set for 5, 10, 25, 50 and 100 ppm. The color removal for methylene blue was 100% at all concentrations. However, for the rhodamine B and methyl orange, the color removal achieved 100% for the first three concentration 5, 10 and 25 ppm. The higher concentration of 50 and 100 ppm, the removal were slightly reduced. For the 50 ppm, the color removal of rhodamine B was 98% and for methyl orange 87% respectively. At 100 ppm, the color removal for rhodamine B drops to 92% and for the methyl orange was only 77% respectively. The GSC was very effective to remove methylene blue dyes at any concentration followed by rhodamine B and methyl orange. This GSC composite material is potential to be applied for water purification.

Poly(ethylene imine)-modified graphene oxide with improved colloidal stability and its adsorption of methyl orange

2014 ◽  
Vol 70 (5) ◽  
pp. 851-857 ◽  
Author(s):  
Hongxi Liu ◽  
Ting Wu ◽  
Zhimin Wu ◽  
Yong Zhang ◽  
Keqin Xuan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Methyl Orange ◽  
Adsorption Capacity ◽  
Colloidal Stability ◽  
Ethylene Imine ◽  
Chemically Modified ◽  
Modified Graphene Oxide ◽  
Infrared Spectrometer ◽  
Poly Ethylene ◽  
Modified Graphene

Graphene oxide (GO) was chemically modified with poly(ethylene imine) (PEI) to improve its colloidal stability and was investigated as a potential adsorbent for the removal of methyl orange (MO). The synthesis of PEI-GO was verified with a Fourier transform infrared spectrometer and thermogravimetric analysis. A series of adsorption experiments were carried out to investigate the adsorption capacity of PEI-GO. Adsorption kinetics and thermodynamics studies were performed, and the thermodynamic parameters were calculated. The results showed that PEI could improve the colloidal stability of GO in aqueous solution, and the obtained PEI-GO showed a macroscopically homogeneous dispersion after more than three months. After standing for 90 days, the Brunauer–Emmett–Teller specific surface area of GO decreased from 353 to 214 m2 · g−1, while that of PEI-GO remained almost unchanged (from 432 to 413 m2 · g−1). The PEI-GO exhibited significantly faster kinetic and higher adsorption capacity for MO than GO. Moreover, PEI-GO had a good adsorption capacity in the acidic range, and the highest adsorption of MO occurred at pH = 6.0. The adsorption of MO on PEI-GO was an endothermic, spontaneous and physisorption process.

scholarly journals Fabrication of carboxymethyl functionalized β-cyclodextrin-modified graphene oxide for efficient removal of methylene blue

2020 ◽  
Vol 13 (9) ◽  
pp. 7020-7031 ◽  
Author(s):  
Ludan Zhao ◽  
Peixiao Tang ◽  
Qiaomei Sun ◽  
Shuangshuang Zhang ◽  
Zili Suo ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Graphene Oxide ◽  
Efficient Removal ◽  
Modified Graphene Oxide ◽  
Modified Graphene

Gold nanoparticle supported on ionic liquid-modified graphene oxide as an efficient and recyclable catalyst for one-pot oxidative A3-coupling reaction of benzyl alcohols

RSC Advances ◽  
2014 ◽  
Vol 4 (79) ◽  
pp. 42155-42158 ◽  
Author(s):  
Siyavash Kazemi Movahed ◽  
Noushin Farajinia Lehi ◽  
Minoo Dabiri
Keyword(s):  
Ionic Liquid ◽  
Graphene Oxide ◽  
Gold Nanoparticle ◽  
Coupling Reaction ◽  
Recyclable Catalyst ◽  
One Pot ◽  
Highly Active ◽  
Modified Graphene Oxide ◽  
A3 Coupling ◽  
Modified Graphene

A novel gold nanoparticle supported on graphene oxide with ionic liquid framework was used as a highly active and recyclable catalyst for novel domino oxidative A3-coupling reaction.

Anchoring H3PW12O40 on 3-aminopropyltriethoxysilane modified graphene oxide: enhanced adsorption capacity and photocatalytic activity toward methyl orange

2015 ◽  
Vol 39 (5) ◽  
pp. 3719-3727 ◽  
Author(s):  
Weiming Xiao ◽  
Panpan Zhao ◽  
Shengjun Deng ◽  
Ning Zhang
Keyword(s):  
Photocatalytic Activity ◽  
Graphene Oxide ◽  
Methyl Orange ◽  
Adsorption Capacity ◽  
Impregnation Method ◽  
Modified Graphene Oxide ◽  
Enhanced Adsorption ◽  
Modified Graphene

A novel PW12/GO–NH2 hybrid was obtained via an impregnation method, which exhibited enhanced adsorption capacity and photocatalytic activity.

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