Removal of 17β-estradiol by few-layered graphene oxide nanosheets from aqueous solutions: External influence and adsorption mechanism

Jiang, Luhua; Liu, Yunguo; Zeng, Guangming; Xiao, Fang-yu; Hu, Xinjiang; Hu, Xi; Wang, Hui; Li, Ting‐Ting; Zhou, Lu; Tan, Xiaofei

doi:10.1016/j.cej.2015.08.139

Cited by 270 publications

(89 citation statements)

References 47 publications

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“…With the purpose of maintaining its high anticancer efficacy, different reports are found in the literature about the incorporation of 2ME in different types of NPs, such as metallic NPs [19,20], polymerics NPs, and other nanostructured materials [21,22]. These studies confirm that NPs conjugated with 2ME are more effective from the point of view of cancer cell killing in comparison to 2ME alone.…”

Section: Introductionsupporting

confidence: 71%

FTIR and Raman Characterization of TiO2 Nanoparticles Coated with Polyethylene Glycol as Carrier for 2-Methoxyestradiol

et al. 2017

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Abstract:The aim of this study was to prepare a novel targeting drug delivery system for 2-Methoxyestradiol (2ME) in order to improve the clinical application of this antitumor drug. It is based in nanoparticles (NPs) of titanium dioxide (TiO 2 ) coated with polyethylene glycol (PEG) and loaded with 2ME. A complete IR and Raman characterization have been made to confirm the formation of TiO 2 -PEG-2ME composite. Vibrational modes have been assigned for TiO 2 , PEG, and 2ME and functionalized TiO 2 -PEG and TiO 2 -PEG-2ME. The observed variation in peak position of FTIR and Raman of each for these composites has been elucidated in terms of intermolecular interactions between PEG-2ME and TiO 2 , obtaining step-by-step the modification processes that were attributed to the conjugation of PEG and 2ME to TiO 2 NPs. Modifying TiO 2 NPs with PEG loaded with the 2ME drug revealed that the titanium dioxide nanocarrier possesses an effective adsorption capability, and we discuss their potential application as a system of drug delivery.

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Section: Introductionsupporting

confidence: 71%

FTIR and Raman Characterization of TiO2 Nanoparticles Coated with Polyethylene Glycol as Carrier for 2-Methoxyestradiol

et al. 2017

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“…The amount of the degraded ST was calculated using the following formula:

q normale = \frac{((), normalC 0 ‐ normalCe) V}{m}

where C 0 and C e are the initial and equilibrium ST concentrations (mg L ‐1 ), respectively; V is the volume of the ST solution (L); and m is the mass of the composite (g).…”

Section: Experimental Materials and Methodsmentioning

confidence: 99%

Titanium dioxide‐coated biochar composites as adsorptive and photocatalytic degradation materials for the removal of aqueous organic pollutants

Cai

Jiang

Liu

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND This article reports the synthesis and characterisation of titanium dioxide‐coated biochar composites (TBCs) by pyrolysing titanium dioxide‐treated biomass prepared by a modified sol–gel method. Their adsorptive and photocatalytic activities were evaluated based on the removal of safranine T (ST) from an aqueous solution with/without UV‐light irradiation. RESULTS Characterisation studies suggested that TiO2 was successfully loaded on the biochar substrate. The biochar and TiO2 contents of the composite significantly affected its performance. The ST removal capabilities of the TBCs with 1, 1.5, 2, and 2.5 g of the biomass are 1.7, 2.3, 7.2, and 2.3 times better than that of the raw biochar, respectively. Thus, the optimum amount of biomass in TBC‐x was determined to be 2 g, with the corresponding sample exhibiting excellent stability, effectiveness over a wide pH range, and a maximum ST removal capacity of 226.7 mg g‐1. CONCLUSION The loading of TiO2 significantly enhanced the adsorption performance of biochar and the high specific surface area of the biochar synergistically promoted the photocatalytic activity of TiO2. Both adsorption and photocatalytic degradation were confirmed to contribute to the decolourisation of the aqueous solution because of the removal of ST, with the effect of adsorption being slightly higher than that of photocatalysis. The synthesised composite is a promising alternative material for removing chemical contaminants. © 2017 Society of Chemical Industry

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“…Several interactions have been proposed to illustrate the attraction between organic matter and graphene-based materials including electrostatic interaction [20,41,58], hydrogen bond [45,53,58] and -force [13,21,53,58]. As shown in the FTIR spectrum (Fig.…”

Section: Mechanism Analysismentioning

confidence: 98%

“…Generally, pH influenced organic uptake by its effect on the speciation distribution of adsorbate and surface charge of adsorbent [41]. The pKa of 2,4-D was 2.7 [42].…”

Section: Effect Of Initial Solution Phmentioning

confidence: 99%

Adsorption of 2,4-D on magnetic graphene and mechanism study

Liu

Yang

et al. 2016

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Removal of 17β-estradiol by few-layered graphene oxide nanosheets from aqueous solutions: External influence and adsorption mechanism

Cited by 270 publications

References 47 publications

FTIR and Raman Characterization of TiO2 Nanoparticles Coated with Polyethylene Glycol as Carrier for 2-Methoxyestradiol

FTIR and Raman Characterization of TiO2 Nanoparticles Coated with Polyethylene Glycol as Carrier for 2-Methoxyestradiol

Titanium dioxide‐coated biochar composites as adsorptive and photocatalytic degradation materials for the removal of aqueous organic pollutants

Adsorption of 2,4-D on magnetic graphene and mechanism study

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