Sodium dodecyl sulfate-multi-walled carbon nanotubes-coated-membrane solid phase extraction of glucocorticoids in aqueous matrices

Goh, Shalene Xue Lin; Goh, Esther Xue Yi; Lee, Hian Kee

doi:10.1016/j.talanta.2020.121624

Cited by 23 publications

(7 citation statements)

References 52 publications

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“…89 Goh et al have prepared a sodium dodecyl sulfate-multi-walled carbon nanotube-coated-membrane for solid phase extraction of glucocorticoids. 90 negative active materials to be applied for lead-acid batteries. 91 Herein, the carbon nanotube/SDS-alumina nanocomposite is designed to combine three component-based adsorbents including carbon nanotubes, alumina, and SDS for arsenic and mercury removal investigations.…”

Section: Morphology and Porosity Characterization Of The Carbon Nanot...mentioning

confidence: 99%

Influence of Synthesis-Heating Conditions on the Porosity and Performance of a Carbon Nanotube/SDS-Alumina Nanocomposite for Effective Wastewater Treatment: Fabrication, Characterization, and Adsorption Modeling

Habila,

ALOthman,

Hakami

et al. 2023

Ind. Eng. Chem. Res.

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Wastewater treatment for the removal of heavy metals can reduce environmental contamination, enable safer industrial activities, and enhance sustainable practices. Efficient materials processing oriented to low temperature operating conditions; thus, the development and modeling of carbon nanotube/SDS-alumina nanocomposite-based adsorbents (CNT/ SDS-alumina) for efficient wastewater treatment are investigated in this work. The optimization of a low temperature-based process is targeted in this work to achieve a cost-effective method for fabrication of CNT/SDSalumina nanocomposites. The fabrication process involves the investigation of various heating conditions in an oven and autoclave with successful optimization for the formation of porous CNT/SDS-alumina nanocomposite-based adsorbents. The fabricated materials were characterized by TEM, SEM, XRD, FTIR, and surface area analysis. The results indicate that the heating condition is the factor controlling the formation of the porous structure of the CNT/SDS-alumina nanocomposite, which affects the wastewater treatment application. The surface area was higher (49.26−51.02 cm 2 /g) for CNT/SDS-alumina nanocomposite-based adsorbents prepared under autoclave heating conditions. The best adsorption capacity values obtained using the CNT/SDS-alumina nanocomposite prepared under autoclave conditions were 463 mg/g for arsenic ions and 418 mg/g for mercury ions, revealing the high efficiency of the prepared materials for the adsorption of pollutants. The adsorption process for the removal of arsenic and mercury is reported to follow the second-order kinetic model. The adsorption data for the CNT/SDS-alumina nanocomposite-based adsorbents prepared under autoclave heating conditions are well fitted with the Langmuir isotherm, suggesting a monolayer adsorption mechanism. Additionally, the prepared CNT/SDS-alumina nanocomposite-based adsorbents are recommended for potential applications involving the adsorption of various heavy metals for real wastewater treatment situations.

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Section: Morphology and Porosity Characterization Of The Carbon Nanot...mentioning

confidence: 99%

Influence of Synthesis-Heating Conditions on the Porosity and Performance of a Carbon Nanotube/SDS-Alumina Nanocomposite for Effective Wastewater Treatment: Fabrication, Characterization, and Adsorption Modeling

Habila,

ALOthman,

Hakami

et al. 2023

Ind. Eng. Chem. Res.

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“…Therefore, various adsorbent materials with high adsorption capacity, improved stability, and enhanced extraction efficiency, as well as high affinity and selectivity towards the target analytes have been reported in literature. These include amino-functionalized metal–organic frameworks 31 , Magnetic GO/γ-Fe 2 O 3 nanoparticles 13 , sodium dodecyl sulfate- multi-walled carbon nanotubes 32 , functional groups-rich graphene oxide and carbon nanotubes 22 and Fe 3 O 4 -Al 2 O 3 @CNFs 21 . Among the above mentioned adsorbent materials, metal–organic frameworks (MOFs) have been receiving increased consideration as sorbents in DSPE.…”

Section: Introductionmentioning

confidence: 99%

From polyethylene waste bottles to UIO-66 (Zr) for preconcentration of steroid hormones from river water

Selahle

Nqombolo

Nomngongo

2023

Sci Rep

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Metal–organic framework (UiO-66 (Zr) was synthesized using polyethylene terephthalate (PET) and used as an adsorbent for extraction and preconcentration of steroid hormones in river water. Polyethylene waste bottles were used as the source of polyethylene terephthalate (PET) ligands. The UIO-66(Zr), which the PET was made from recycled waste plastics, was used for the first time for the extraction and preconcentration of four different types of steroid hormones in river water samples. Various analytical characterization techniques were employed to characterize the synthesized material. The steroid hormones were detected and quantified using high-performance liquid chromatography coupled with diode array detector (HPLC–DAD). The results were further validated using ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS). Experimental variables, such as sample pH, the mass of adsorbent and extraction time, were optimized using Box-Behnken design (BBD). The dispersive solid phase extraction method combined with HPLC–DAD, displayed good linearity (0.004–1000 µg/L) low limits of detections (LODs, 1.1–16 ng/L for ultrapure water and 2.6–5.3 ng/L for river water) and limits of quantification (LOQs, 3.7–5.3 ng/L for ultrapure water and 8.7–11.0 ng/L for river water samples) and acceptable extraction recoveries (86–101%). The intraday (n = 10) and interday (n = 5) precisions expressed in terms of relative standard deviations (%RSD) were all less than 5%. The steroid hormones were detected in most of the river water samples (Vaal River and Rietspruit River). The DSPE/HPLC method offered a promising approach for simultaneous extraction, preconcentration and determination of steroid hormones in water.

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“…The concentration of doping places a crucial role in the functional capabilities of the device. Sodium dodecyl sulfonate (SDS) is one of the common surfactants that has been used with CNTs for better dispersion in common solvents [51,52]. It increases the hydrophilicity of CNTs by attaching themselves to the hydrophobic part of the nanotube and others with any solvent for dissolution [53].…”

Section: Introductionmentioning

confidence: 99%

Novel Surfactant-Induced MWCNTs/PDMS-Based Nanocomposites for Tactile Sensing Applications

et al. 2022

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The paper presents the use of surfactant-induced MWCNTs/PDMS-based nanocomposites for tactile sensing applications. The significance of nanocomposites-based sensors has constantly been growing due to their enhanced electromechanical characteristics. As a result of the simplified customization for their target applications, research is ongoing to determine the quality and quantity of the precursor materials that are involved in the fabrication of nanocomposites. Although a significant amount of work has been done to develop a wide range of nanocomposite-based prototypes, they still require optimization when mixed with polydimethylsiloxane (PDMS) matrices. Multi-Walled Carbon Nanotubes (MWCNTs) are one of the pioneering materials used in multifunctional sensing applications due to their high yield, excellent electrical conductivity and mechanical properties, and high structural integrity. Among the other carbon allotropes used to form nanocomposites, MWCNTs have been widely studied due to their enhanced bonding with the polymer matrix, highly densified sampling, and even surfacing throughout the composites. This paper highlights the development, characterization and implementation of surfactant-added MWCNTs/PDMS-based nanocomposites. The prototypes consisted of an optimized amount of sodium dodecyl sulfonate (SDS) and MWCNTs mixed as nanofillers in the PDMS matrix. The results have been promising in terms of their mechanical behaviour as they responded well to a maximum strain of 40%. Stable and repeatable output was obtained with a response time of 1 millisecond. The Young’s Modulus of the sensors was 2.06 MPa. The utilization of the prototypes for low-pressure tactile sensing applications is also shown here.

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Sodium dodecyl sulfate-multi-walled carbon nanotubes-coated-membrane solid phase extraction of glucocorticoids in aqueous matrices

Cited by 23 publications

References 52 publications

Influence of Synthesis-Heating Conditions on the Porosity and Performance of a Carbon Nanotube/SDS-Alumina Nanocomposite for Effective Wastewater Treatment: Fabrication, Characterization, and Adsorption Modeling

Influence of Synthesis-Heating Conditions on the Porosity and Performance of a Carbon Nanotube/SDS-Alumina Nanocomposite for Effective Wastewater Treatment: Fabrication, Characterization, and Adsorption Modeling

From polyethylene waste bottles to UIO-66 (Zr) for preconcentration of steroid hormones from river water

Novel Surfactant-Induced MWCNTs/PDMS-Based Nanocomposites for Tactile Sensing Applications

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