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Novel pyrene functionalized mesoporous core–shell structured silica (denoted as SiO 2 @mSiO 2 /Py-Si) was designed and synthesized as a highly selective fluorescent chemosensor for detecting Hg 2+ in water. The core–shell structured silica was prepared by a simple sol–gel process through coating SiO 2 nanospheres with a layer of ordered mesoporous silica. The surface...
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