Self-assembled three-dimensional double network graphene oxide/polyacrylic acid hybrid aerogel for removal of Cu2+ from aqueous solution

Han, Qiaoqiao; Chen, Lei; Li, Wenxiao; Zhou, Zhiyong; Zhou, Fang; Xu, Zhiwei; Qian, Xiaoming

doi:10.1007/s11356-018-3409-9

Cited by 31 publications

(19 citation statements)

References 50 publications

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“…The crosslinked PAA in the resulted CLGO/PAA aerogel not only stabilizes the structure of GO but also makes the disorder of GO increase and the content of -COOH increase, with the introduction of PAA. The increased carboxyl group improves the hydrophilicity of GO/PAA aerogel and provides more coordination sites for adsorption of Pb 2+ [21]. The results have showed that the CLGO/PAA aerogel surface contains a large number of carboxyl functional groups.…”

Section: Introductionmentioning

confidence: 92%

“…At this time, the adsorption rate was mainly is affected by surface adsorption and internal diffusion [21,46,47]. However, the action of GO/PAA aerogel to adsorb Pb(II) is mainly electrostatic interaction [21,48]. The addition of PAA increases the carboxyl groups on the surface of the adsorbent.…”

Section: Adsorption Studies Of Clgo/paa Aerogel For Pb (Ii)mentioning

confidence: 99%

“…In figure 7(a), when the concentration of Pb(II) is lower than 500 mg l −1 , a large number of active substances are in the primary stage, and the adsorption rate is mainly controlled by surface adsorption [21]. With the increase of concentration, a concentration gradient appeared on the surface and inside of the adsorbent, which provided the necessary driving force for the migration of Pb(II) to the porous, and accelerated the diffusion of Pb(II) into the adsorbent [47].…”

Section: Adsorption Studies Of Clgo/paa Aerogel For Pb (Ii)mentioning

confidence: 99%

“…At the beginning of adsorption, the CLGO/PAA aerogel has a large number of active adsorption sites, the adsorption rate is fast, and the adsorption amount increases with time. At this time, a large number of active substances are in the primary stage, and the adsorption rate is mainly controlled by surface adsorption [21]. When the adsorption reaches a certain time, the active sites on the adsorbent decrease, and a concentration gradient will exist on the surface and inside of the adsorbent, which will promote the diffusion of Pb(II) into the adsorbent [48].…”

Section: Adsorption Studies Of Clgo/paa Aerogel For Pb (Ii)mentioning

confidence: 99%

“…Kong et al [20] prepared GO/PAA hydrogel by graft polymerization, and improved the Cd 2+ adsorption by adding PAA. Han et al [21] prepared a three-dimensional (3D) dual network GO/PAA hybrid aerogel using a one-pot in situ solution polymerization method. The addition of PAA not only acts as a binder, but also provides more multiple active functional groups, high specific surface area, and abundant active sites.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of the crosslinked GO/PAA aerogel and its adsorption properties for Pb(II) ions

Wang

Lei

Kang

et al. 2020

Mater. Res. Express

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The graphene oxide(GO)/polyacrylic acid(PAA) was prepared by in situ polymerization in graphene oxide lamellae, and crosslinked graphene oxide/polyacrylic acid complex(CLGO/PAA) was formed by esterification reaction between 1,4-butanediol and carboxylic acid of PAA at same time. The CLGO/PAA aerogel was prepared by freeze drying method. The CLGO/PAA aerogel has good stability and high saturated adsorption capacity for the adsorption of Pb(II) ions in water. The structure and properties of the CLGO/PAA aerogel were characterized by using x-ray diffractometry (XRD), field emission scanning electron microscopy (FESEM), infrared spectroscopy(FT-IR), and atomic absorption spectrometer(AAS), respectively. The results show that the prepared CLGO/PAA aerogel possess elliptical pore structure. In addition, the adsorption properties of the CLGO/PAA aerogel for Pb(II) in water were studied under different pH, different concentrations of Pb(II), contact time and number of adsorbent cycles. The results show that the adsorption amount of Pb(II) could reach to 640 mg g −1 at the initial concentration of Pb(II) was 500 mg l −1 , and the adsorption equilibrium could be reached after 60 min. The adsorption amount for Pb(II) was still 143 mg g −1 after 5 times cycle.

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Section: Introductionmentioning

confidence: 92%

Section: Adsorption Studies Of Clgo/paa Aerogel For Pb (Ii)mentioning

confidence: 99%

Section: Adsorption Studies Of Clgo/paa Aerogel For Pb (Ii)mentioning

confidence: 99%

Section: Adsorption Studies Of Clgo/paa Aerogel For Pb (Ii)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Preparation of the crosslinked GO/PAA aerogel and its adsorption properties for Pb(II) ions

Wang

Lei

Kang

et al. 2020

Mater. Res. Express

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Graphene‐Based Macromolecular Assemblies for Scavenging Heavy Metals

Chowdhury

Pan

2020

ChemistryOpen

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The integration of graphene or graphene oxide nanosheets into three‐dimensional (3D) graphene‐based macromolecular assemblies (GMAs), in the form of sponges, beads, fibres, films, and crumpled nanosheets, has greatly advanced their environmental remediation applications. This is attributed to the outstanding physicochemical characteristics and superlative mechanical features of 3D GMAs, including precise and physically linked permeable networks, enormous surface area, profound porosity, and high‐class sturdiness, amongst others. In this review, the recent advancements towards the exploration of 3D GMAs as an exciting new class of high‐performance adsorbents, for eliminating toxic heavy metal ions from both wastewater and freshwater, are systematically summarized and discussed, from both fundamental and applied perspectives. In particular, the numerous surface modification techniques that are actively pursued to enrich the metal adsorption capacity of 3D GMAs, are comprehensively examined. Additionally, associated challenges are pointed out and tactical research strategies and improvements are proposed, with an eye on the conceivable future.

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Biobased Graphene for Synthesis of Nanophotocatalysts in the Treatment of Wastewater: A Review and Future Perspective

Supriya

Rane

Chaturvedi

et al. 2023

Biorefinery: A Sustainable Approach for the Production of Biomaterials, Biochemicals and Biofuels

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Self-assembled three-dimensional double network graphene oxide/polyacrylic acid hybrid aerogel for removal of Cu2+ from aqueous solution

Cited by 31 publications

References 50 publications

Preparation of the crosslinked GO/PAA aerogel and its adsorption properties for Pb(II) ions

Preparation of the crosslinked GO/PAA aerogel and its adsorption properties for Pb(II) ions

Graphene‐Based Macromolecular Assemblies for Scavenging Heavy Metals

Biobased Graphene for Synthesis of Nanophotocatalysts in the Treatment of Wastewater: A Review and Future Perspective

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