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In this work, a comprehensive investigation of the composite Ag@AgCl/ZnCo 2 O 4  microspheres photocatalyst, prepared by a facile two-step method, is presented, and using complementary characterization tools such as X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X ray spectroscopy (EDX), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HR-TEM), selected area electron diffraction (SAED), X-ray photoelectron spectroscopy (XPS), UV-Vis diffuse reflectance spectroscopy (DRS), and Brunauer-Emmett-Teller (BET). Results show that the composite Ag@AgCl/ZnCo 2 O 4  photocatalyst has good microspheres morphology and high crystalline and its absorption intensity in the whole spectrum range is higher than that of pure ZnCo 2 O 4 . It is observed that the specific surface area of the composite Ag@AgCl/ZnCo 2 O 4  photocatalyst and the adsorption efficiency of rhodamine B (RhB) increase as a result of deposition of Ag@AgCl. In the Ag@AgCl/ZnCo 2 O 4  degradation system of RhB, the photocatalytic degradation rate of 0.2Ag@AgCl/ZnCo 2 O 4  becomes 99.4% within 120 min, and RhB is almost completely degraded. The reaction rate constant of composite 0.2Ag@AgCl/ZnCo 2 O 4  photocatalyst is found to be 0.01063 min −1 , which is 1.6 times that of Ag@AgCl and 10 times of the minimum value of ZnCo 2 O 4 . In addition, the radical capture experiment indicates that, in the reaction system of Ag@AgCl/ZnCo 2 O 4 , the main oxidative species of Ag@AgCl/ZnCo 2 O 4  photocatalyst are superoxide anion (O ·  −   2  − 2 ) and hole (h + ) and not hydroxyl radical (·OH). Based on the results, a Z-scheme plasmon photocatalytic mechanism of Ag@AgCl/ZnCo 2 O 4  composite system is proposed, to elucidate the RhB degradation.

Anchoring Plasmonic Ag@AgCl Nanocrystals onto ZnCo2O4 Microspheres with Enhanced Visible Photocatalytic Activity