Improving barium ion adsorption on two-dimensional titanium carbide by surface modification

Mu, Wanjun; Du, Shenzhen; Yu, Qianhong; Li, Xingliang; Yang, Yong

doi:10.1039/c8dt00917a

Cited by 84 publications

(38 citation statements)

References 50 publications

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“…After being etched by HCl-LiF, the Ti 3 AlC 2 characteristic peak of Al layers at 39°was disappeared, showing that Ti 3 C 2 T x MXene was successfully prepared. Meanwhile, the Ti 3 C 2 T x MXene of (002) plane was shift down to the 8.84°, the d-spacing of Ti 3 C 2 T x MXene became larger than Ti 3 AlC 2 (Mu et al 2018). However, the characteristic peaks were basically the same after adsorbing Cr(VI), which indicated the structure of Ti 3 C 2 T x MXene was stable during the adsorption process.…”

Section: Results and Discussion Characterizationmentioning

confidence: 94%

Highly efficient scavenging of Cr(VI) by two-dimensional titanium carbide nanosheets: kinetics, isotherms and thermodynamics analysis

Chang

et al. 2021

Water Science and Technology

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In this study, two-dimensional (2D) MXene material (Ti3C2Tx) was employed to investigate its potentials toward the Cr(VI) removal in aqueous system by batch experiments. Characterization techniques such as SEM-EDS, HRTEM, XRD, FI-TR and XPS were used to analyze the structure and interaction of Ti3C2Tx before and after Cr(VI) adsorption. The results indicated that layered structure of Ti3C2Tx had unique surface functional properties and abundant active sites, such as –OH, Ti–O, C = O, which exhibited high adsorption capacity for the Cr(VI) removal. The Cr(VI) adsorption capacity by Ti3C2Tx decreased with the increase of pH, and its maximum value can reach 169.8 mg/g at pH = 2.0. The adsorption kinetic was well-explained by a pseudo-second-order kinetic, indicating that chemical interaction played a dominant role in the adsorption of Cr(VI) on Ti3C2Tx. Meanwhile, the isotherm data was calculated to conform the Freundlich isotherm model. Thermodynamic analysis indicated that the adsorption process of Cr(VI) on Ti3C2Tx was a spontaneous endothermic process. These experimental results revealed that Ti3C2Tx had tremendous potential in heavy metals adsorption from aqueous solutions.

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Section: Results and Discussion Characterizationmentioning

confidence: 94%

Highly efficient scavenging of Cr(VI) by two-dimensional titanium carbide nanosheets: kinetics, isotherms and thermodynamics analysis

Chang

et al. 2021

Water Science and Technology

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“…In the process of separation ions, the concentration of acid is very important factor for metal ions [22][23][24][25][26] . The effects of the concentration of HNO The mechanism of the reaction in liquid-liquid extraction between TBTDS and divalent metal ions was proposed previously 27) .…”

Section: Effect Of Hno 3 Concentrationmentioning

confidence: 99%

Adsorption Behavior of Sr and Ba Using TDS-Impregnated Microporous Silica-Based Adsorbents in Nitric Acid Solution

Kawamura

Kudo

Itô

et al. 2022

J.I.E.

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Silica-based adsorbents impregnated tetra-n-butyl thiuram disulfide (TBTDS) or tetrakis (2-ethylhexyl) thiuram disulfide (T(2EH)TDS) as extractants on a macroporous silica/polymer composite support (SiO 2 -P) were prepared to separate barium (Ba) ions from strontium (Sr) ions present in mixed solutions. The Ba and Sr ion adsorption behaviors of each adsorbent were investigating by varying acid concentration, contact time, temperature, and metal concentrations in solution using the batch method. The Ba and Sr adsorption affinities depended on nitric acid concentration, and the difference in distribution coefficient (K d ) between the two ions was maximum in 1 M HNO 3 . Furthermore, results indicated that the adsorption reaction starts several hours after the initial solution-adsorbent contact and reaches equilibrium within 4-10 hours. The dependence for thermal for adsorption indicated to be spontaneous processes. The adsorption mechanisms were investigated by applying two isotherm models. The shapes of the isotherms were different between the TBTDS adsorbent and the T(2EH)TDS adsorbents. The isotherm for the two T(2EH)TDS adsorbents were well fitted by the Langmuir model, but that for TBTDS was S-shaped and more metal ions were adsorbed than the other adsorbents. These results suggest that the Ba and Sr ions could be separated from each other via the batch method using these adsorbents.

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“…Ti 3 C 2 T x MXene has been experimentally confirmed to be an effective adsorbent for Cu(II) ion [50]. Additionally, it is also experimentally reported that Ti 3 C 2 T x MXene can effectively adsorb Ba(II) ion [51,52], yet lack of first-principles analysis.…”

Section: First-principles Progress Of Adsorption Of Pollutants On mentioning

confidence: 99%

First-Principles Studies of Adsorptive Remediation of Water and Air Pollutants Using Two-Dimensional MXene Materials

Zhang

Chen

2018

Materials

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Water and air pollution is a critical issue across the whole world. Two-dimensional transition metal carbide/nitride (MXene) materials, due to the characteristics of large specific surface area, hydrophilic nature and abundant highly active surficial sites, are able to adsorb a variety of environmental pollutants, and thus can be used for environmental remediation. First-principles method is a powerful tool to investigate and predict the properties of low-dimensional materials, which can save a large amount of experimental costs and accelerate the research progress. In this review, we summarize the recent research progresses of the MXene materials in the adsorptive remediation of environmental pollutants in polluted water and air using first-principles simulations, and try to predict the research direction of MXenes in the adsorptive environmental applications from first-principles view.

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Improving barium ion adsorption on two-dimensional titanium carbide by surface modification

Cited by 84 publications

References 50 publications

Highly efficient scavenging of Cr(VI) by two-dimensional titanium carbide nanosheets: kinetics, isotherms and thermodynamics analysis

Highly efficient scavenging of Cr(VI) by two-dimensional titanium carbide nanosheets: kinetics, isotherms and thermodynamics analysis

Adsorption Behavior of Sr and Ba Using TDS-Impregnated Microporous Silica-Based Adsorbents in Nitric Acid Solution

First-Principles Studies of Adsorptive Remediation of Water and Air Pollutants Using Two-Dimensional MXene Materials

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