摘要：

The interlamellar dodecylbenzene sulfonate (DBS) in layered double hydroxides (LDHs) can amplify an ultraweak chemiluminescence (CL) from Fenton-like reaction (Co(II) + H2O2 + OH–). The CL enhancement mechanism of the intercalated DBS on the H2O2–Co(II) CL was investigated by CL spectrum, radical scavengers, powder X-ray diffraction measurements, scanning electron microscope images, transmission electron microscopy images, Fourier transform infrared spectroscopy, electronic spinning resonance measurements, and elemental analysis techniques. The hydrophobic microenvironment of the intercalated DBS in LDHs facilitated the formation of hydroxyl radical (•OH) by the reaction of Co(II) with H2O2 in alkaline medium. The abundant •OH radical can easily react with the intercalated DBS in LDHs to form sulfite radical (•SO3–). The recombination of •SO3– radical could generate an intermediate as the excited sulfur dioxide molecules (SO2*), which generated strong CL emission centered at ∼430 nm. Our experiments illus...

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