Adsorption of Rutin from Aqueous Solution over an OMS‐2‐Modified ZrO2 Nanocomposite. Issue 23 (14th June 2022)

• Record Type: Journal Article
• Authors: Wang, Weifeng; Bi, Xiuru; Chai, Tian; Zhao, Peiqing; Yang, Jun‐Li; Meng, Xu
• Is Part Of: ChemistrySelect. Volume 7:Issue 23(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-06-14
• Subjects: ZrO2 -- Manganese Oxide -- Adsorption -- Rutin -- Nanocomposite; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.202200902
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: Adsorption and purification of biological molecules with pharmacological functions over advanced adsorption materials are always a concern. In this work, manganese oxide octahedral molecular sieve (OMS‐2)‐modified ZrO2 nanocomposites (ZrO2 ‐OMS‐2) were fabricated and their adsorption performance towards rutin from aqueous solution was investigated. As‐obtained nanocomposites were fully characterized by N2 adsorption/desorption isothermal, ICP‐AES, XRD, SEM and TEM, which indicates that OMS‐2‐modification significantly promoted the textural properties of the nanocomposites. 10 mol% Mn amount for ZrO2 ‐OMS‐2 showed the optimal adsorption capacity for rutin due to the enhanced specific surface aera (104 m 2 /g) and better ZrO2 dispersion. The adsorption rate of 85 % was realized over 10 mg of the optimal adsorbent and the desorption rate could reach nearly 100 % in 0.2 % TFA/methanol solution. Moreover, the adsorbent could be reused for at least 3 times. The adsorption behavior was fitted the pseudo‐second‐order model and Freundlich model. Kinetic and thermodynamic studies suggested that an endothermic chemosorption from Lewis acid‐base paring on the surface of ZrO2 ‐OMS‐2 was responsible for the good adsorption. This work shows the positive effect of manganese oxide‐modification for ZrO2 during adsorption process and the potential of ZrO2 ‐based nanocomposites being adsorbents. Abstract : For ZrO2 adsorbent, a doping strategy was developed to modify its surface and structure properties for the adsorption enhancement. OMS‐2‐modified ZrO2 materials were fabricated for the adsorption of rutin. OMS‐2 could promote the textural properties of ZrO2 ‐based nanocomposite from the surface to framework and significantly better its adsorption performance. Material characterization, and adsorption kinetics and thermodynamics combined suggested that Lewis acid‐base paring on the surface of the nanocomposite via chemical adsorption play a key role in the adsorption.