A novel Sn/SnOx Ti3C2Tx nanosheet for adsorptive strontium removal in aqueous solution

초록

A novel Sn/SnOx@Ti3C2Tx adsorbent was fabricated via in situ growth of Sn/SnOx particles on layers of Ti3C2Tx nanosheets using facile electrostatic attraction followed by liquid-phase reduction. The character-ization results demonstrated that Sn/SnOx particles were uniformly anchored onto the Ti3C2Tx surface and a sandwich-like-structured nanocomposite was formed. The introduction of Sn/SnOx particles increased the space between the Ti3C2Tx nanosheets, thereby increasing the number of active sites for Sr2 + ion removal. Moreover, the incorporated particles served as pillars to strengthen the structural stability of the Ti3C2Tx matrix and inhibited nanolayer restacking during Sr2+ion removal. Experimental results in-dicated that an initial strontium concentration of 5.0 mg/L was reduced to approximately 0.26 mg/L by Sn/SnOx@Ti3C2Tx within 90 min at pH 7. Furthermore, the Langmuir isotherm best fitted the adsorption data, and the maximum adsorption capacity of Sn/SnOx @Ti3C2Tx for Sr2 + ions was 71.04 mg/g at 298 K. Thus, Sn/SnOx@Ti3C2Tx nanocomposites is a promising adsorbent for the removal of Sr2 + ions from aque-ous media.(c) 2023 Elsevier B.V. All rights reserved.

키워드