Mercury (Hg 2+ ), even ultra-low-concentration amount in water, presents a serious environment concern. Thus, the removal, especially Hg (II) content in the ultratrace level (ppb), from water is still challenging. In this work, without any pretreatment, one novel MOF material can act as high-capacity and collectable adsorbent for the removal of Hg (II) from water, especially for ultratrace Hg 2+ ion in the ppb magnitude, mainly due to a combined effect from the pore walls functionalized by free-standing, accessible acylamide and hydroxyl units.
A multiple spot imaging system which is composed of a combination of two orthogonal linear zone plate arrays is fabricated. Applications of the components such as optical modules as beam splitter and duplicator of image patterns suitable for optical computing are demonstrated.
Quantitative evaluation of optical information storage capacity in a photorefractive material Bi12SiO20 was made experimentally. Methods are presented for simultaneous and successive multiple information recording in the same volume of Bi12SiO20 crystal. The phenomenon of cross-talks between two phase holograms was investigated by continuously changing the angle of the reference beam. The minimum angle between two recording pump beams without cross-talks that determine the packing density of phase holograms in the crystal, was found to be of the order of submilliradians.
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