Adsorption and electrochemical regeneration of intercalated Ti3C2Tx MXene for the removal of ciprofloxacin from wastewater

Ghani, Ahsan Abdul; Shahzad, Asif; Moztahida, Mokrema; Tahir, Khurram; Jeon, Hye Won; Kim, Bolam

doi:10.1016/j.cej.2020.127780

Cited by 71 publications

(27 citation statements)

References 61 publications

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“…Whereas, the nanosheets of 10%-Ti 3 C 2 (OH) x were much thinner than those of the pristine Ti 3 C 2 T x . The observation can be attributed to the replacement of the −F terminations with −OH, which produced the ultrathin stacking layers …”

Section: Resultsmentioning

confidence: 99%

“…The observation can be attributed to the replacement of the −F terminations with −OH, which produced the ultrathin stacking layers. 39 The XRD patterns of Ti 3 AlC 2 , Ti 3 C 2 T x , and Ti 3 C 2 (OH) x samples are shown in Figure 3a. Compared with the raw material Ti 3 AlC 2 , Ti 3 C 2 T x showed no peak at 2θ = 39°c orresponding to the (104) diffraction plane, which indicated that Ti 3 AlC 2 was completely transformed into Ti 3 C 2 T x after the removal of the Al layer by HF etching.…”

Section: Ti C F (S) Xkoh (Aq)mentioning

confidence: 99%

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Adsorptive Removal of Radioactive Cesium from Model Nuclear Wastewater over Hydroxyl-Functionalized Mxene Ti₃C₂T_x

Chi

et al. 2022

Ind. Eng. Chem. Res.

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Selective removal of 137 Cs from nuclear wastewater is still a challenge due to the issues of efficient adsorbent exploitation and high concentrations of competitive ions. In this study, two-dimensionallayered Mxene Ti 3 C 2 T x achieved the surface alkaline modification with KOH to be used as an efficient adsorbent for Cs + removal from model wastewater. Hydroxyl-modified Ti 3 C 2 T x obtained improved the delamination morphology and surface structure compared with the pristine Ti 3 C 2 T x . In addition, the F species in Ti 3 C 2 T x were efficiently removed and the hydroxyl groups were increased after modification. The adsorption efficiency of Cs + over the hydroxyl-modified Ti 3 C 2 T x was significantly enhanced, being attributed to the improvements in morphology, structure, and properties. 0.05 g of an optimal adsorbent achieved 90% removal of Cs + with 5 mg•L −1 initial concentration in 50 mL of model wastewater within 5 min at ambient temperature and neutral conditions. Hydroxyl-modified Ti 3 C 2 T x also exhibited high adsorption selectivity for Cs + in the presence of competitive metal ions such as K + , Na + , Mg 2+ , and Ca 2+ . The mechanism study revealed that the ion exchange between [Ti−O] − H + /Cs + mainly contributed to Cs + adsorption, and the complexation between the oxygen-containing groups [Ti−O] in modified Ti 3 C 2 T x and Cs was also involved. The hydroxyl-modified Ti 3 C 2 T x was easy to regenerate and exhibited good recyclability for Cs + adsorption.

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Section: Resultsmentioning

confidence: 99%

Section: Ti C F (S) Xkoh (Aq)mentioning

confidence: 99%

Adsorptive Removal of Radioactive Cesium from Model Nuclear Wastewater over Hydroxyl-Functionalized Mxene Ti₃C₂T_x

Chi

et al. 2022

Ind. Eng. Chem. Res.

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“…Furthermore, the morphology and interlayer distance of the MXene flakes before and after surface functionalization have also been studied. [ 17 ] The techniques employed for this purpose include X‐Ray diffractometer (XRD), [ 85 , 87 , 101 ] X‐Ray photoelectron spectroscopy (XPS), [ 86 , 102 ] scanning electron microscopy (SEM), transmission electron microscopy/high‐resolution transmission electron microscopy (TEM/HRTEM), [ 103 , 104 , 105 , 106 ] energy dispersive X‐ray analysis (EDAX), [ 107 , 108 ] Fourier transform infrared spectroscopy (FTIR), [ 109 , 110 ] Brunauer–Emmett–Teller analysis (BET), Raman spectroscopy, [ 111 , 112 , 113 , 114 ] and thermogravimetric analysis (TGA). [ 101 , 112 , 115 , 116 ] MXenes have been functionalized with several materials ranging from metal nanoparticles to cellulose aerogel, amino groups, etc.…”

Section: Mxenesmentioning

confidence: 99%

Surface Functionalized MXenes for Wastewater Treatment—A Comprehensive Review

et al. 2022

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Over 80% of wastewater worldwide is released into the environment without proper treatment. Whilst environmental pollution continues to intensify due to the increase in the number of polluting industries, conventional techniques employed to clean the environment are poorly effective and are expensive. MXenes are a new class of 2D materials that have received a lot of attention for an extensive range of applications due to their tuneable interlayer spacing and tailorable surface chemistry. Several MXene‐based nanomaterials with remarkable properties have been proposed, synthesized, and used in environmental remediation applications. In this work, a comprehensive review of the state‐of‐the‐art research progress on the promising potential of surface functionalized MXenes as photocatalysts, adsorbents, and membranes for wastewater treatment is presented. The sources, composition, and effects of wastewater on human health and the environment are displayed. Furthermore, the synthesis, surface functionalization, and characterization techniques of merit used in the study of MXenes are discussed, detailing the effects of a range of factors (e.g., PH, temperature, precursor, etc.) on the synthesis, surface functionalization, and performance of the resulting MXenes. Finally, the limits of MXenes and MXene‐based materials as well as their potential future research directions, especially for wastewater treatment applications are highlighted.

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“…In this context, GO, Fe(III) and hydrazine hydrate (reduction of GO) were mixed under alkaline conditions and temperatures below 100 °C thus anchoring Fe3O4 nanoparticles on rGO. Ghani et al used sodium-intercalated, multi-layer Ti 3 C 2 T x nanosheets to study their adsorption behaviour and electrochemical regeneration for the removal of ciprofloxacin [70].…”

Section: Binary and Ternary Nanocompositesmentioning

confidence: 99%

Two-Dimensional Nanomaterials for the Removal of Pharmaceuticals from Wastewater: A Critical Review

2021

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The removal of pharmaceuticals from wastewater is critical due to their considerable risk on ecosystems and human health. Additionally, they are resistant to conventional chemical and biological remediation methods. Two-dimensional nanomaterials are a promising approach to face this challenge due to their combination of high surface areas, high electrical conductivities, and partially optical transparency. This review discusses the state-of-the-art concerning their use as adsorbents, oxidation catalysts or photocatalysts, and electrochemical catalysts for water treatment purposes. The bibliographic search bases upon academic databases including articles published until August 2021. Regarding adsorption, high removal capacities (>200 mg g−1) and short equilibrium times (<30 min) are reported for molybdenum disulfide, metal-organic frameworks, MXenes, and graphene oxide/magnetite nanocomposites, attributed to a strong adsorbate-adsorbent chemical interaction. Concerning photocatalysis, MXenes and carbon nitride heterostructures show enhanced charge carriers separation, favoring the generation of reactive oxygen species to degrade most pharmaceuticals. Peroxymonosulfate activation via pure or photo-assisted catalytic oxidation is promising to completely degrade many compounds in less than 30 min. Future work should be focused on the exploration of greener synthesis methods, regeneration, and recycling at the end-of-life of two-dimensional materials towards their successful large-scale production and application.

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Adsorption and electrochemical regeneration of intercalated Ti3C2Tx MXene for the removal of ciprofloxacin from wastewater

Cited by 71 publications

References 61 publications

Adsorptive Removal of Radioactive Cesium from Model Nuclear Wastewater over Hydroxyl-Functionalized Mxene Ti₃C₂T_x

Adsorptive Removal of Radioactive Cesium from Model Nuclear Wastewater over Hydroxyl-Functionalized Mxene Ti₃C₂T_x

Surface Functionalized MXenes for Wastewater Treatment—A Comprehensive Review

Two-Dimensional Nanomaterials for the Removal of Pharmaceuticals from Wastewater: A Critical Review

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Adsorption and electrochemical regeneration of intercalated Ti3C2Tx MXene for the removal of ciprofloxacin from wastewater

Cited by 71 publications

References 61 publications

Adsorptive Removal of Radioactive Cesium from Model Nuclear Wastewater over Hydroxyl-Functionalized Mxene Ti3C2Tx

Adsorptive Removal of Radioactive Cesium from Model Nuclear Wastewater over Hydroxyl-Functionalized Mxene Ti3C2Tx

Surface Functionalized MXenes for Wastewater Treatment—A Comprehensive Review

Two-Dimensional Nanomaterials for the Removal of Pharmaceuticals from Wastewater: A Critical Review

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Product

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Adsorptive Removal of Radioactive Cesium from Model Nuclear Wastewater over Hydroxyl-Functionalized Mxene Ti₃C₂T_x

Adsorptive Removal of Radioactive Cesium from Model Nuclear Wastewater over Hydroxyl-Functionalized Mxene Ti₃C₂T_x