“…[ 24 ] There are three main types of cyclodextrins, including α‐, β‐, and γ‐, each comprised of 6, 7, and 8 glucose units, respectively. [ 25 ] Among them, β‐CD received higher attention in environmental studies, due to its hydrophobic cavity with medium size, flexibility, easier to form complexes, lower cost and less solubility in water. The water solubility of β‐CD is its main limitation for direct application in purification and contamination removal.…”