H3PO4(0.7 M, a THF solution (4 mL) of H3PO4(270 mg), THF, CH3CN and aqueous HCl (12 M) and NaOH (14 M) solutions and stirred for one week. Before PXRD and nitrogen sorption isotherm measurements, the resulting COF samples were treated as follow. ...
H3PO4, K2Cr2O7, HCl, and NaOH were purchased from Beijing Chemical Co. Ltd. The stock solution of Cr(VI) was prepared by dissolving an exact quantity of K2Cr2O7 in deionized water. The solutions containing Cr(VI) for adsorption experiments were obtained by diluting 1000 mg/L of stock ...