Fig. 10

The high-resolution XPS spectra of C1s, N1s, and O1s obtained before (a, c, and e) and after (b, d, and f) Cu(II) ions sorption on \(\:\text{P}\text{m}\text{A}\text{P}/\text{A}\text{P}\text{T}\text{E}\text{S}{/\text{G}\text{O}}_{\left(6.6\right)}\).