Silver-loaded tannic acid modified Ti3C2 catalyst to efficiently catalyze the degradation of dyes

Abstract

Ag@Ti3C2-TA nanocomposite catalyst was elaborately constructed by a simple and green method with Ti3C2 as the carrier, tannic acid (TA) as the modifier, and silver nitrate as the precious metal precursor. A series of characterizations were used to analyze morphology and microstructure of the resulting catalyst. The degradation behaviors of the catalyst were studied with rhodamine B (RB) and methyl orange (MO) as the model dyes. The result demonstrated that Ag@Ti3C2-TA exhibited efficient catalytic degradation performance toward both RB and MO, and the degradation percentage increased with the growth of TA content in the catalyst. The catalytic degradation process conformed to the quasi-level kinetic model, and catalytic reaction rate constants of Ag@Ti3C2-TA for RB and MO were 0.972 and 1.478 min−1, respectively. The catalytic degradation percentage of Ag@Ti3C2-TA toward RB and MO still remained above 80% even after 10 catalytic cycles, indicating high degradation percentage and considerable catalytic stability.