Cotton derived carbonaceous aerogels for the efficient removal of organic pollutants and heavy metal ions

Chen, He; Wang, Xiangxue; Li, Jiaxing; Wang, Xiangke

doi:10.1039/c5ta00299k

Cited by 216 publications

(106 citation statements)

References 36 publications

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“…This result is in accordance with our previous studies, i.e., adsorption of metal cations is mainly contributed to the ion-exchange with interlayered Na + 30. 532 and 530 eV presents the O from adsorbed surface hydroxyl groups (-OH) and the crystal lattice [Ti-O 6 ] 54. In the high resolution O 1s spectra, the peak at ca.…”

supporting

confidence: 92%

Selective and irreversible adsorption of mercury(ii) from aqueous solution by a flower-like titanate nanomaterial

et al. 2015

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A novel flower-like titanate nanomaterial (titanate nanoflowers, TNFs) was synthesized through a hydrothermal method using nano-anatase and sodium hydroxide, and used for mercury(II) removal from aqueous solution. The large surface area (187.32 m 2 g À1 ) and low point of zero charge (3.04) of TNFs facilitated the adsorption of cations. Adsorption experiments indicated that TNFs could quickly capture 98.2% of Hg(II) from solution within 60 min at pH 5. The maximum adsorption capacity of Hg(II) was as large as 454.55 mg g À1 calculated by the Langmuir isotherm model. Moreover, selective adsorption of Hg(II) by TNFs was observed with the coexistence of other conventional cations (i.e., Na + , K + , Mg 2+ and Ca 2+ ) even at 10 times concentration of Hg(II). XRD analysis indicated that the prepared TNFs were a kind of tri-titanate composed of an edge-sharing triple [TiO 6 ] octahedron and interlayered Na + /H + , and ionexchange between Hg 2+ and Na + was the primary adsorption mechanism. Furthermore, it was interesting that the basic crystal structure of TNFs, tri-titanate (Ti 3 O 7 2À ), transformed into hexa-titanate (Ti 6 O 13 2À ) after adsorption, resulting in the trapping of Hg(II) into the lattice tunnel of this hexa-titanate. Desorption experiments also confirmed the irreversible adsorption due to Hg(II) trapped in TNFs, which achieved safe disposal of this highly toxic metal in practical application. ; Fax: +1 334 524 0068; Tel: +1 334 524 0068 † Electronic supplementary information (ESI) available: Parameters for adsorption kinetic and isotherm models; adsorption capacity of Hg(II) by typical adsorbents; HSAB hardness and hydration energy of metal ions; atomic percent of TNFs; BET surface area, size distribution and zeta potential varying with the pH of TNFs; Hg(II) species distribution with pH. See

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confidence: 92%

Selective and irreversible adsorption of mercury(ii) from aqueous solution by a flower-like titanate nanomaterial

et al. 2015

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“…[34][35][36] More recently, researchers have made tremendous efforts to produce various porous carbons from inexpensive renewable biomasses such as bagasse, 37 cotton, 38 rice, 39 silk proteins, 40 lignosulphonatecellulose, 41 typha orientalis, 42 wood. 43 However, limited methods to access HPCs from biomass have been reported.…”

Section: Introductionmentioning

confidence: 99%

Facile self-templating large scale preparation of biomass-derived 3D hierarchical porous carbon for advanced supercapacitors

et al. 2015

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Routine or incremental work, however competently researched and reported, should not be recommended for publication if it does not meet our expectations with regard to novelty and impact.It is the responsibility of authors to provide fully convincing evidence for the homogeneity and identity of all compounds they claim as new. Evidence of both purity and identity is required to establish that the properties and constants reported are those of the compound with the new structure claimed.Thank you for your effort in reviewing this submission. It is only through the continued service of referees that we can maintain both the high quality of the publication and the rapid response times to authors.Corn husk, a renewable biomass, has been successfully explored as low-cost crude carbon source to prepare advanced higher-value 3D HPCs by means of KOH pre-treatment and direct pyrolysis, and the route is simple, self-template and easy to implement scale-up for industrialization. The CHHPCs present many advantages for supercapacior application, including higher surface area (928 m 2 g -1 ), hierarchical porosity consisting of macro, meso, and micropores, turbostratic carbon structure, uniform pore size, 3D architecture and rich O-doping (17.1 wt%). The supercapacitor performance of CHHPCs was evaluated in 6 M KOH electrolyte and 1 M Na 2 SO 4 electrolyte. The CHHPCs exhibits a high specific capacitance of 356 F g -1 and 300 F g -1 at 1 A g -1 , 20 A g -1 , respectively, ultra-high rate capability with 88% retention rate from 1 to 10 A g -1 and outstanding cycling stability with 95% capacitance retention after 2500 cycles. The CHHPCs symmetric supercapacitor displays a high energy density of 21 Wh kg -1 at a power density of 875 W kg -1 and retains as high as 11 Wh kg -1 at 5600 W kg -1 in 1M Na 2 SO 4 electrolyte. The facile, efficient and template-free synthesis strategy for novel 3D-HPCs from biomass sources may promote commercial application of 3D-HPCs in the fields of supercapacitors, lithium ion batteries, fuel cells and sorbents.

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“…[12][13][14][15][16][17][18] PDA and its hybrid nanomaterials have been developed as novel adsorbents to remove organic dyes, such as PDA microspheres, 19 PDA-graphene composites or hydrogel, [20][21][22] Fe 3 O 4 -PDA core-shell microspheres, [23][24][25][26] CaCO 3 -PDA hybrids, 27 electrospun nanofibrous-PDA membranes, 28 and clay-PDA complexes. [34][35][36] Recently, Jin et al demonstrated that PDA-GO composite could adsorb dyes selectively. These drawbacks greatly limit the practical applications of PDA based adsorbents.…”

Section: Introductionmentioning

confidence: 99%

Highly regenerable alkali-resistant magnetic nanoparticles inspired by mussels for rapid selective dye removal offer high-efficiency environmental remediation

et al. 2015

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Most recently, polydopamine (PDA) and its hybrid nanomaterials have been developed as promising adsorbents to remove organic dyes. However, PDA based adsorbents are typically lack of recyclability, alkali resistant and selective adsorption. Herein, novel PDA based magnetic nanoparticles are fabricated for the first time via the simultaneous incorporation of PDA and poly(ethylenimine) (PEI) on Fe3O4 nanoparticles simply in one step to overcome almost all disadvantages of "traditional" PDA adsorbents. The constructed PDA based magnetic nanoparticles have ultrathin shell layer (only about 3 nm, much thinner than that of other PDA adsorbents), and can withstand strong alkaline solutions (0.1 M NaOH, pH=13), exhibiting excellent alkali resistance. Remarkably, the nanoparticles show superior performance in smart and fast selective removal (>95%, just in five minutes) of anionic dyes from dye mixtures and can maintain their high efficiency (>90%) even after 10 cycles, indicating the unprecedented selective adsorption capacity and desirable recyclability. The adsorption process follows pseudo-second order reaction kinetics, as well as Langmuir isotherm, indicating that anionic dyes are monolayer adsorbed on the hybrid by electrostatic interaction. In particular, the readily regeneration of the novel composite nanoparticles can be accomplished only within several minutes, demonstrating excellent regeneration ability. Our work can provide new insights into utilizing mussel-inspired materials for environmental remediation and creating advanced magnetic materials for various promising applications.

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Cotton derived carbonaceous aerogels for the efficient removal of organic pollutants and heavy metal ions

Abstract: Carbon aerogels were made from waste cotton for the efficient removal of pollutants from aqueous solution.

Cited by 216 publications

References 36 publications

Selective and irreversible adsorption of mercury(ii) from aqueous solution by a flower-like titanate nanomaterial

Selective and irreversible adsorption of mercury(ii) from aqueous solution by a flower-like titanate nanomaterial

Facile self-templating large scale preparation of biomass-derived 3D hierarchical porous carbon for advanced supercapacitors

Highly regenerable alkali-resistant magnetic nanoparticles inspired by mussels for rapid selective dye removal offer high-efficiency environmental remediation

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