Green synthesis of Cu₂O/non-woven fabrics for selective removal of anionic dyes

The composite materials of Cu2O/non-woven fabrics (Cu2O/NF) were green synthesized by using tea polyphenol as the reducing agent, and utilized for selective removal of dyes. The morphological and structural properties of Cu2O/NF were analyzed with XRD, EDS, SEM, FTIR, BET and XPS, and found that Cu2O particles were somewhat ordered spherical shaped and evenly distributed on the non-woven fabrics. The Cu2O/NF presented good capacity of selective removal towards anionic dyes such as OrangeII, Congo Red and Methyl Orange. Amongst the removal rate of Orange IIreached 96.26%. The removal processes were well fitted as pseudo second-order dynamic and Langmuir adsorption isotherm models. Furthermore, the removal rate remained at 75.41% after three cycled use, suggesting good stability and reusability of the prepared Cu2O/NF.