Synthesis of magnetic β-cyclodextrin–chitosan/graphene oxide as nanoadsorbent and its application in dye adsorption and removal

Fan, Lulu; Luo, Chuannan; Sun, Min; Qiu, H.; Li, Xiangjun

doi:10.1016/j.colsurfb.2012.11.023

Cited by 322 publications

(126 citation statements)

References 36 publications

Supporting

Mentioning

119

Contrasting

Order By: Relevance

“…Based on this research, magnetic β-cyclodextrin-chitosan/ GO (MCCG) was synthesised in their later research. This adsorbent had good and versatile adsorption capacity to the dyes due to the synergistic effect of the surface property of GO, hydrophobicity of β-cyclodextrin, the abundant amino and hydroxyl functional groups of chitosan and the magnetic property of Fe 3 O 4 [46]. More importantly, it can be regenerated easily and rapidly.…”

Section: Adsorption For Organic Pollutantsmentioning

confidence: 99%

Applications of graphene-based materials in environmental protection and detection

Yang

et al. 2013

Chin. Sci. Bull.

View full text Add to dashboard Cite

Many efficient adsorbents and sensors based on graphene and functionalized graphene have been constructed for the removal and detection of environmental pollutants due to its unique physicochemical properties. In this article, recent research achievements are reviewed on the application of graphene-based materials in the environmental protection and detection. For environmental protection, modified graphene can adsorb heavy metal ions in a high efficiency and selectivity, and thus reduces them to metals for recycling. High adsorption capacity of graphene-based materials to kinds of organic pollutants in water was also presented. Several graphene-based sensors with high limit of detection were reported to detect heavy metal ions, toxic gases and organic pollutants in environment. Finally, a perspective on the future challenge of adsorbents and detection devices based on graphene is given. Environmental pollution especially toxic gases, heavy metal ions and organic pollutants in air and water, caused by industry and agricultural activities, severely threaten ecological balance and human health, and have received extensive attention worldwide. For example, the heavy metal ions in bodies accumulated from the food chains will cause various chronic diseases. Therefore, it is necessary to develop simple, sensitive and inexpensive methods to remove and detect these pollutants. Currently, many efficient adsorbents and sensitive detection devices based on nanomaterials especially graphene have been designed due to their unique chemical, thermal, electronic, and mechanical properties. Graphene, a two-dimensional (2D) one atom thick nanomaterial consisting of sp 2 -hybridized carbon, has attracted great interest among scientists due to its unique properties, including high specific surface area (SSA) of 2600 m 2 g −1 [1], excellent thermal conductivities of 5000 W mhigh-speed electron mobility of 200000 cm 2 V −1 s −1 at room temperature [3], high stiffness and strength with Young's modulus of around 1000 GPa and break strength of 130 GPa [4], extraordinary electrocatalytic activity [5] and optical properties [6]. These outstanding physicochemical properties indicate its potential application in many research fields. For example, considering the high surface area and strong adsorption capacity of graphene, many efficient adsorbents [7] and photocatalysts [8] are developed for the removal and photocatalytic degradation of pollutants. Moreover, based on the excellent electrical conductivity and optical properties of graphene, many sensitive electrochemical [9] and fluorescent [10] sensors are also designed for the detection of pollutants. However, aggregations of graphene decrease its available surface area and further reduce its adsorption capacity. Functionalization of graphene with molecules, which have water-solubility and affinity toward target analytes, will improve the selectivity of adsorbents or detection devices, as well as prevent the aggregation. Based on this

show abstract

Section: Adsorption For Organic Pollutantsmentioning

confidence: 99%

Applications of graphene-based materials in environmental protection and detection

Yang

et al. 2013

Chin. Sci. Bull.

View full text Add to dashboard Cite

show abstract

“…The samples were collected, and the concentration of ethidium bromide in the aqueous matrices was determined after a specified period of time at 2,5,8,11,14,17, and 20 min by applying the spectrophotometer of UV-VIS (Thermo Electron Corporation, Aquamate) at 475 nm, respectively. Thereupon, to study adsorption kinetic parameter (q t ), in mg/g, for ethidium bromide at time t Eq.…”

Section: Adsorption Process Studymentioning

confidence: 99%

“…Graphene and graphene derivatives are more attractive recently because of their high selectivity, favorable physicochemical stability, and structural diversity. Extensive experiments have been conducted on the adsorption of organic or inorganic contaminants on graphene and graphene derivatives, such as Formaldehyde Molecule [14], Uranium(VI) [15], 1-naphthol [16], dyes [17], and adsorption of Pb(II) and Hg(II) [18]. Therefore, graphene and graphene derivatives might be good sorbents for the removal of contamination from water.…”

Section: Introductionmentioning

confidence: 99%

Kinetics adsorption study of the ethidium bromide by graphene oxide as adsorbent from aqueous matrices

2017

View full text Add to dashboard Cite

In this study of ethidium bromide, adsorption from aqueous matrices by graphene oxide as adsorbent was investigated. Influencing parameters in the adsorption study included contact time, temperature, and pH. The optimum time was selected 17 min, and the best value of pH was determined at 8. All adsorption experiments were performed at 298 K temperature. The maximum wavelength of ethidium bromide was 475 nm. The Elovich, four types of the pseudo-second-order, the pseudo-first-order, and intra-particle diffusion kinetic adsorption models were used for kinetic study, and the results show that adsorption of ethidium bromide on graphene oxide surface best complied with type (I) of the pseudo-second-order kinetic model.

show abstract

“…Chitosan has two types of reactive functional groups, amino groups and hydroxyl groups. Due to its intrinsic characteristics, the natural polymer is often chosen as an effective biosorbent for the removal or the recovery of hazardous dyes, proteins and heavy metals (Fan et al, 2013;Wang et al, 2013). The degree of deacetylation controls the amount of free amino groups in the polymer chain.…”

Section: Introductionmentioning

confidence: 99%

Kinetics and Adsorption Isotherm of Ibuprofen onto Grafted β-CD/Chitosan Polymer

Bany-Aiesh¹,

Banat²,

Al-Sou’od³

2015

American Journal of Applied Sciences

View full text Add to dashboard Cite

The adsorption of the Ibuprofen (Ibu) drug on β-cyclodextrin (β-CD) grafted chitosan polymer was studied under different experimental conditions. The effect of Ibu concentration, mass of β-CD grafted chitosan polymer as adsorbent, contact time, temperature and pH were investigated. Three equilibrium models, Langmuier, Freundlich and Temkin isotherm models were analyzed to evaluate the adsorption isotherms. The adsorption isotherms were best fitted by Freundlich isotherm model, with correlation coefficient 0.9882, the intensity of adsorption parameters was lower than one and Freundlich adsorption isotherm constant value was more than one. High adsorption was found in acidic media pH 2, 27°C and 1 h adsorption time. In order to investigate the kinetic of the adsorption process four kinetic models were analyzed, pseudo first order kinetic model, pseudo second order kinetic model, the Elovich kinetic model and intraparticle diffusion kinetic model. Kinetic parameters include; binding strength constant, first order adsorption rate constant, intraparticle diffusion rate constant, adsorption half time, rate constant, equilibrium constant and adsorption capacities. Correlation coefficient for each kinetic equation was reported. The adsorption kinetics was best fitted by pseudo-first order kinetic equation, with correlation coefficient 0.9922. The rate determining step is well described by intraparticle diffusion process. The Intraparticle diffusion rate constant values ranging from 0.163 to 1.1441 mgg −1 min −1/2 .

show abstract

Synthesis of magnetic β-cyclodextrin–chitosan/graphene oxide as nanoadsorbent and its application in dye adsorption and removal

Cited by 322 publications

References 36 publications

Applications of graphene-based materials in environmental protection and detection

Applications of graphene-based materials in environmental protection and detection

Kinetics adsorption study of the ethidium bromide by graphene oxide as adsorbent from aqueous matrices

Kinetics and Adsorption Isotherm of Ibuprofen onto Grafted β-CD/Chitosan Polymer

Contact Info

Product

Resources

About

Synthesis of magnetic β-cyclodextrin–chitosan/graphene oxide as nanoadsorbent and its application in dye adsorption and removal

Cited by 322 publications

References 36 publications

Applications of graphene-based materials in environmental protection and detection

Applications of graphene-based materials in environmental protection and detection

Kinetics adsorption study of the ethidium bromide by graphene oxide as adsorbent from aqueous matrices

Kinetics and Adsorption Isotherm of Ibuprofen onto Grafted &beta;-CD/Chitosan Polymer

Contact Info

Product

Resources

About

Kinetics and Adsorption Isotherm of Ibuprofen onto Grafted β-CD/Chitosan Polymer