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Three-dimensional ordered macroporous (3DOM) rare earth oxide—CeO2 was prepared by colloid crystal template. Cerous nitrate in the presence of citric acid was used as precursor and polystyrene (PS) beads as template. The effect and mechanism between citric acid and cerous nitrate was studied. The introduction of citric acid as chelator could overcome the disadvantage from the low melting point of...
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