Graphene-boron nitride composite aerogel: A high efficiency adsorbent for ciprofloxacin removal from water

Han, Lei; Khalil, Ahmed M.E.; Wang, Junkai; Chen, Yu; Li, Faliang; Hong, Cheng Shong; Zhang, Haijun; Liu, Xueyin; Li, Guangqiang; Jia, Quanli; Zhang, Shaowei

doi:10.1016/j.seppur.2021.119605

Cited by 32 publications

(14 citation statements)

References 57 publications

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“…Figure presents together the transmittance FT-IR spectra of bare and encapsulated K 2 FeO 4 . In the case of the former (Figure a), a primary peak appeared at 808 cm –1 along with a shoulder peak at 780 cm –1 , which was the characteristic peak of FeO 4 . − In the case of the latter (Figure b), the spectrum showed the characteristics peaks of the shell materials. The characteristic peak at 1100 cm –1 arose from ethyl cellulose, and those centered around 2916, 1471, and 720 cm –1 belong to the stretching and bending vibrations of paraffin wax .…”

Section: Resultsmentioning

confidence: 95%

“…Apart from single-phase graphene, its composite counterparts performed well. For example, with a GNP/BN (graphene nanoplatelet/boron nitride) composite, a maximum adsorption capacity of 185 mg/g was achieved in the removal of ciprofloxacin, 6 and in the case of using an Fe 3 O 4 /PG composite, a high adsorption capacity of 460 mg/g along with a rapid adsorption (within 5 min) was achieved against organic dye methyl violet. 7 In the chemical synthesis of PG, graphite oxide (GO) is one of the key starting precursors.…”

Section: Introductionmentioning

confidence: 99%

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Near Green Synthesis of Porous Graphene from Graphite Using an Encapsulated Ferrate(VI) Oxidant

et al. 2023

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Graphene oxide (GO) is a conventional yet vital precursor for the synthesis of porous graphene (PG). Several strong oxidizing agents such as potassium permanganate and perchlorates are typically used for oxidization of graphite. However, they expose toxic reactants/products that harm the environment. Therefore, a greener approach is desperately needed to oxidize and exfoliate graphite. This study reports for the first time on successful oxidation of graphite by ferrate(VI) compounds via an encapsulation approach. By further reducing GO prepared from this near green route with vitamin C, PG anticipated by many highly important and expanding areas such as water treatment could be readily achieved. X-ray diffraction (XRD), Fourier transform infrared (FTIR) and UV−vis spectroscopy, and scanning electronic microscopy (SEM) along with energy-dispersive spectroscopy confirmed the high yield of GO from the oxidation of graphite. Raman spectroscopy, XRD, and TEM confirmed the formation of high-quality few-layered PG from the reduction of as-prepared GO. The above results demonstrated the practicality of using encapsulated ferrate(VI) compounds to realize green oxidation of graphite and resolve the paradox about the oxidation capability of ferrate(VI). To further illustrate its potential for the removal of emerging and crucial contaminants from water, as-prepared PG was further examined against the contaminants of methyl orange (MeO) dye and ibuprofen (IBU). Taken together, the results revealed that more than 90% removal efficiency could be achieved at a high PG dosage against MeO and IBU. This ground-breaking greener approach opens the door to risk-free, extensive graphene environmental applications.

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Section: Resultsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Near Green Synthesis of Porous Graphene from Graphite Using an Encapsulated Ferrate(VI) Oxidant

et al. 2023

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“…[ 4b ] The diffraction peaks (2θ) found in the XRD pattern of BNF at 26.5° and 43.6° corresponded respectively to the (002) and (101) planes of BN; however, they were relatively low. [ 25 ] For the final GO/BNF sample, the phase composition was almost the same as the BNF, suggesting that the crystallinity of BN formed under the current nitriding condition and GO content was very low. Moreover, the density and compressive strength of the as‐prepared GO/BNF and BNF samples were determined as 32–35 mg cm –3 and 40–47 kPa (GO/BNF) and 26–31 mg cm –3 and 25–30 kPa (BNF), respectively.…”

Section: Resultsmentioning

confidence: 99%

Novel Graphene‐Based Foam Composite As a Highly Reactive Filter Medium for the Efficient Removal of Gemfibrozil from (Waste)Water

Khalil

Han

Maamoun

et al. 2022

Advanced Sustainable Systems

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Graphene‐based materials have emerged as alternative adsorbents, but their success in removing pharmaceutical contaminants has been limited due to degradation caused by restacking and limited control over their sizes and porosities. Driven by this issue, in the current study, to counteract the restacking behavior, graphene sheets are supported on a thread/rod‐like matrix structure in a boron nitride foam material, and a novel porous composite foam‐supported graphene is synthesized. The as‐prepared novel composite offers extraordinary features, such as high absorption kinetics, large available surface area, high porosity (>98%), ecofriendliness and cost‐effective synthesis, and excellent affinity to emerging pharmaceutical contaminants. When batch‐testing graphene‐based foam material and porous graphene nanosheets to remove gemfibrozil (GEM) from wastewater samples, rapid adsorption kinetics (<5 min) are exhibited by the graphene‐based foam. Column filter studies are conducted for both materials to test their performance in removing GEM from distilled water, synthetic graywater, and actual wastewater. Overall, the foam composite‐based filter marginally outperforms the sand‐supported graphene filter and significantly outperforms the unsupported graphene filter. A numerical MATLAB model is developed to simulate the reactive solute transport of GEM influent through the foam filter. Also, a formal sensitivity analysis is conducted to identify the key parameters influencing the model results.

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“…Therefore, many processes, such as chemical precipitation, physical adsorption, biodegradation method, and membrane separation, have been developed to address oil spill pollution. Among these methods, the use of adsorption materials is considered one of the most promising methods for the removal of oils [85,86] and organic solvents, such as dyes [87] and antibiotics [88,89]. GBAs are widely applied for the adsorption of these organic matters.…”

Section: Removal Of Organic Compoundsmentioning

confidence: 99%

A perspective on graphene based aerogels and their environmental applications

2022

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Graphene-boron nitride composite aerogel: A high efficiency adsorbent for ciprofloxacin removal from water

Cited by 32 publications

References 57 publications

Near Green Synthesis of Porous Graphene from Graphite Using an Encapsulated Ferrate(VI) Oxidant

Near Green Synthesis of Porous Graphene from Graphite Using an Encapsulated Ferrate(VI) Oxidant

Novel Graphene‐Based Foam Composite As a Highly Reactive Filter Medium for the Efficient Removal of Gemfibrozil from (Waste)Water

A perspective on graphene based aerogels and their environmental applications

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