The entire material used was decontaminated by washing it with a
neutron detergent rinsing it with distilled water and soaking it into a
clean diluted HCl 2% (v/v) bath for 4 h at room temperature. Each
soaking was followed by intensive rinsing with ultrapure water deionized
water with resistivity of ≥ 18.2 MΩ cm in a Milli-Q™ Element
system (Millipore, Bedford, MA, USA) for at least three times before
use. Finally, all the material was dried in clean environment.