Compressive, ultralight and fire-resistant lignin-modified graphene aerogels as recyclable absorbents for oil and organic solvents

Chen, Changzhou; Li, Fengfeng; Zhang, Yanru; Wang, Bingxin; Fan, Yongming; Wang, Xiluan; Sun, Run‐Cang

doi:10.1016/j.cej.2018.05.189

Cited by 107 publications

(37 citation statements)

References 44 publications

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“…During the hydrothermal process at 95 °C, the epoxides and hydroxyl groups of GO were reduced by ascorbic acid. At the same time, the formation of a 3D porous structure was achieved due to π‐π interaction . The combination of hydrophobic interaction and π‐π conjugation drove the self‐assembly of TKF and rGO .…”

Section: Resultsmentioning

confidence: 96%

“…At the same time, the formation of a 3D porous structure was achieved due to π‐π interaction . The combination of hydrophobic interaction and π‐π conjugation drove the self‐assembly of TKF and rGO . In addition, the negatively charged graphene sheets were attached to the surface of TKF by electrostatic action, which was beneficial for increasing the surface roughness and reducing the surface energy .…”

Section: Resultsmentioning

confidence: 99%

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Preparation and oil–water separation of 3D kapok fiber‐reduced graphene oxide aerogel

Luo

Tan

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: Oil spills from oil tankers and ships or industrial accidents have serious impacts on the ecological environment.There is an urgent need for finding effective ways to resolve these problems. The use of low-cost and efficient adsorbents is considered to be one of the most effective ways. RESULTS: In this study, an ultra-light 3D kapok fiber-reduced graphene oxide (TKF-rGO) aerogel was prepared by a simple and green one-step hydrothermal method. The kapok fiber used as skeleton was embedded in a graphene network to successfully form a 3D aerogel structure. The as-prepared TKF-rGO aerogel featured low density, excellent mechanical strength, high thermal stability, and high hydrophobic lipophilicity. Furthermore, continuous oil-water separation could be achieved by the aerogel when connected to a vacuum system. The adsorption capacity of TKF-rGO aerogel for various common oil products and organic solvents was 1.5-fold greater than that of pure rGO aerogel and six-fold greater than that of polypropylene melt spray, respectively. In addition, the initial adsorption capacity of the as-prepared TKF-rGO aerogel was maintained at 94% after eight cycles.CONCLUSION: The TKF-rGO aerogel could be synthesized by a low-cost and green method, which was suitable for commercial production, and showed competitive adsorption capacities for oil removal. Thus, the TKF-rGO aerogel is expected to be employed as a promising adsorbent in the removal of oil spill or hazardous organic solvents from water.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Preparation and oil–water separation of 3D kapok fiber‐reduced graphene oxide aerogel

Luo

Tan

et al. 2019

J of Chemical Tech & Biotech

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“…15,16 Carbon aerogels with layered structures prepared by bidirectional freezing have superior elasticity and good fatigue performance (25 000 cycles under 50% strain). 15 In recent years, researchers have developed a range of multifunctional carbon aerogels using different materials such as carbon nanotubes (CNT), 17 graphene oxide (GO), 18 melamine foam/graphene, 19 polyurethane/carbon sponges, 20 and carbon nanobers. 21 GO is one of the most attention-getting carbonbased materials due to its excellent conductivity, exibility, and high strength.…”

Section: Introductionmentioning

confidence: 99%

Reduced graphene oxide-based highly sensitive pressure sensor for wearable electronics via an ordered structure and enhanced interlayer interaction mechanism

et al. 2020

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“…Cost-effective biomaterials as building blocks have been used to combine with GO sheets to prepare affordable carbon-based hybrid aerogels, such as cellulose [15] and lignin [16]. The gelation is a pivotal step in the preparation process of hybrid aerogels, which could be caused by the intramolecular and/or intermolecular hydrogen bonds and physical entanglement between cellulose molecules in terms of the physical mechanism, being mainly responsible for gelation.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Carbonized Kapok Fiber/Reduced Graphene Oxide Aerogel for Oil‐Water Separation

Zhou

et al. 2020

Chem Eng & Technol

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A carbonized composite aerogel was fabricated based on kapok fibers (KFs) and graphene oxide (GO) through hydrothermal and carbonizing reactions. The as-prepared carbonized kapok fiber/reduced graphene oxide (CKF/RGO) aerogel exhibited special features including light weight, fire resistance, stable structure, hydrophobicity, and oleophilicity. The wettability of the KF/GO aerogel was transformed to hydrophobicity after carbonization, which provided the CKF/RGO aerogel with a distinct ability for oil-water separation. The CKF/RGO aerogel was able to adsorb oil liquids up to 110 times of its own weight. The sorption capacity of the CKF/RGO aerogel was still higher than 90 % of the initial sorption capacity after eleven sorption-combustion cycles of n-hexane solvent.

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Compressive, ultralight and fire-resistant lignin-modified graphene aerogels as recyclable absorbents for oil and organic solvents

Cited by 107 publications

References 44 publications

Preparation and oil–water separation of 3D kapok fiber‐reduced graphene oxide aerogel

Preparation and oil–water separation of 3D kapok fiber‐reduced graphene oxide aerogel

Reduced graphene oxide-based highly sensitive pressure sensor for wearable electronics via an ordered structure and enhanced interlayer interaction mechanism

Preparation of Carbonized Kapok Fiber/Reduced Graphene Oxide Aerogel for Oil‐Water Separation

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