Complexation (cucurbit[6]uril-pyrene): Thermodynamic and spectroscopic properties

Occello, Valeria Noemí Sueldo; Rossi, Rita H. de; Veglia, Alicia V.

doi:10.1016/j.jlumin.2014.10.031

Cited by 4 publications

(1 citation statement)

References 42 publications

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“…CB[6] possesses a lower equilibrium association constant when complexed with a larger dye molecule, but it does exhibit shallow interactions with large positively charged moieties . Similarly, researchers have reported the use of CB[6]-based composites for different applications. − This phenomenon could greatly improvise traditional clay-based adsorbents in terms of selectivity and reusability. Therefore, utilizing the nanoparticle-capping ability and complexation phenomenon of CB[6], we have synthesized an improved CB[6]-capped magnetic cobalt ferrite nanoparticle-enriched montmorillonite (CBCM) clay nanocomposite for wastewater treatment.…”

Section: Introductionmentioning

confidence: 99%

Cucurbituril-Functionalized Nanocomposite as a Promising Industrial Adsorbent for Rapid Cationic Dye Removal

Trivedi

Patel

et al. 2021

ACS Omega

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A supramolecular cucurbit[6]uril (CB[6])-enriched magnetic montmorillonite (CBCM) nanocomposite was prepared and characterized. CB[6] played a prominent role as a capping agent, helping in better distribution of the nanoparticles, and as a binder between nanoparticles. Montmorillonite provided structural stability and fortified ultrafast adsorption toward dyes. Its application in the removal of cationic dyes from wastewater was systematically assessed. Process parameters such as pH, initial dye concentration, dosage, temperature, and time were optimized. Kinetics and isotherms of the process were described using pseudo-second-order kinetics and the Langmuir isotherm, respectively. CBCM exhibited rapid dye removal capacity in short reaction times with q max of 199.20, 78.31, and 55.62 mg g–1 and K2 of 0.0281, 0.0.0823, and 0.0953 L mg–1 min–1 for crystal violet, methylene blue, and rhodamine B, respectively. Benefiting from the synergetic effects of montmorillonite surface hydrophobicity, abundant carbonyl groups of CB[6], and magnetic properties of copper ferrite, CBCM demonstrated outstanding dye removal capacity, negligible leaching at saturation, and high tolerance toward harsh conditions. This intrinsic nature is expedient in prolonged industrial operations. To demonstrate industrial viability, syringe filtration and continuous flow fixed-bed column operations were validated. The CBCM fixed-bed column demonstrated stable dye removal efficiency with 10–100 mg mL–1 dye at 10–50 mL min–1 flow rates. Utilizing the magnetic and catalytic activities of the copper ferrite nanoparticles, CBCM was recycled using a magnet, regenerated, and reused for several cycles. CB[6] remarkably improved the performance of the nanocomposite and made it suitable for different effluent treatment techniques. This may pave a sustainable way toward the efficient onsite treatment of effluent at the industrial scale.

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