High structure stability and outstanding adsorption performance of graphene oxide aerogel supported by polyvinyl alcohol for waste water treatment

Dai, Jiangdong; Huang, Ting; Tian, Su-qi; Xiao, Yan-jun; Yang, Jing‐hui; Zhang, Nan; Wang, Yong; Zhou, Zuowan

doi:10.1016/j.matdes.2016.06.039

Cited by 103 publications

(30 citation statements)

References 59 publications

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“…To contrast with the irregular and aggregated structure of CNT and GnP powders, the hybrid aerogels exhibited an open pore network that can facilitate fast molecular diffusion, hence promoting the accessibility of adsorption sites to relatively large dye molecules. Noteworthy, the morphology of CNF-GnP aerogels was quite different from the curly morphology of pure graphene aerogel in a previous study [39]. The morphologies of the CNF, CNT, GnP, CNF-CNT and CNF-GnP adsorbents have been characterized by SEM (Figure 3a-h).…”

Section: Effect Of Adsorbent Structurementioning

confidence: 67%

Cellulose Nanofibril/Carbon Nanomaterial Hybrid Aerogels for Adsorption Removal of Cationic and Anionic Organic Dyes

Dichiara

et al. 2020

Nanomaterials

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Advances in nanoscale science and engineering are providing new opportunities to develop promising adsorbents for environmental remediation. Here, hybrid aerogels are assembled from cellulose nanofibrils (CNFs) and carbon nanomaterials to remove cationic dye methylene blue (MB) and anionic dye Congo red (CR) in single and binary systems. Two classes of carbon nanomaterials, carbon nanotubes (CNTs) and graphene nanoplates (GnPs), are incorporated into CNFs with various amounts, respectively. The adsorption, mechanics and structure properties of the hybrid aerogels are investigated and compared among different combinations. The results demonstrate CNF–GnP 3:1 hybrid exhibits the best performance among all composites. Regarding a single dye system, both dye adsorptions follow a pseudo-second-order adsorption kinetic and monolayer Langmuir adsorption isotherm. The maximal adsorption capacities of CNF–GnP aerogels for MB and CR are 1178.5 mg g−1 and 585.3 mg g−1, respectively. CNF–GnP hybrid show a superior binary dye adsorption capacity than pristine CNF or GnP. Furthermore, nearly 80% of MB or CR can be desorbed from CNF–GNP using ethanol as the desorption agent, indicating the reusability of this hybrid material. Hence, the CNF–GnP aerogels show great promise as adsorption materials for wastewater treatment.

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Section: Effect Of Adsorbent Structurementioning

confidence: 67%

Cellulose Nanofibril/Carbon Nanomaterial Hybrid Aerogels for Adsorption Removal of Cationic and Anionic Organic Dyes

Dichiara

et al. 2020

Nanomaterials

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“…However, they generally have the disadvantage of a poor absorbency and reusability. On the other hand, inorganic aerogels, such as SiO 2 aerogel [4], graphene oxide aerogel [5] and others, exhibit a high absorption capacity, high porosity, and large specific surface area. However, the degradation of most of inorganic aerogels remains a major environmental challenge and may cause secondary pollution, which greatly limits their application.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of High Amylose Corn Starch–Microcrystalline Cellulose Aerogel with High Absorption

et al. 2019

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Microcrystalline cellulose (MCC) aerogels were synthesized, blendingwith high amylose corn starch of different contents based on a NaOH–urea solution, and following by vacuum freeze-drying technology. The microstructure of the aerogel was observed by scanning electron microscopy (SEM) as an interconnected, porous three-dimensional structure, while X-ray diffractogram (XRD) measurements showed that the crystalline form was converted from cellulose I to cellulose II during dissolution and regeneration. Thermogravimetric analysis (TGA) showed that the content of starch had little effect on the thermal stability of the aerogel, whereas the content of starch had great influences on absorption and viscoelastic properties. When the ratio of starch was 10% and 15%, the prepared aerogels presented a low density and abundant pores, which endowed the aerogels, not only with the highest absorption ratio of pump oil and linseed oil (10.63 and 11.44 g/g, respectively), but also with better dynamic viscoelastic properties.

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“…2,3 With large specic surface area and easily modied surface groups, graphene and graphene-based materials have been widely applied in sewage treatment. [4][5][6][7][8][9] There are two methods to design the chemical composition of graphene: the surface functionality and heteroatom doping, which can provide active adsorption sites. [10][11][12][13][14][15] The results show that modications are in favor of improvements of adsorption capacity of graphene towards dyes.…”

Section: Introductionmentioning

confidence: 99%

One-step generation of S and N co-doped reduced graphene oxide for high-efficiency adsorption towards methylene blue

Zhang

et al. 2020

RSC Adv.

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High structure stability and outstanding adsorption performance of graphene oxide aerogel supported by polyvinyl alcohol for waste water treatment

Cited by 103 publications

References 59 publications

Cellulose Nanofibril/Carbon Nanomaterial Hybrid Aerogels for Adsorption Removal of Cationic and Anionic Organic Dyes

Cellulose Nanofibril/Carbon Nanomaterial Hybrid Aerogels for Adsorption Removal of Cationic and Anionic Organic Dyes

Preparation and Characterization of High Amylose Corn Starch–Microcrystalline Cellulose Aerogel with High Absorption

One-step generation of S and N co-doped reduced graphene oxide for high-efficiency adsorption towards methylene blue

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