Today, metal doped ZnO exhibits good performances and attracts worldwide attention. In this paper, a ZIF-8@Zn 1Àx Ni x O photocatalyst was successfully prepared using MOF as precursor and AgNO 3 as catalyst. We explored the influence of Ni content on the photocatalytic activity of ZIF-8@Zn 1Àx Ni x O. The structure and properties of ZIF-8@Zn 1Àx Ni x O were characterized by XRD, SEM, FT-IR, BET, UV-vis diffuse reflectance spectroscopy and so on. The results show that Ni is well loaded in ZIF-8 and part of ZIF-8 is oxidized to form Zn 1Àx Ni x O composites. The photocatalytic performance of ZIF-8@Zn 1Àx Ni x O was evaluated by degradation of rhodamine B (RhB) solution under UV light. It was found that ZIF-8@Zn 0.95 Ni 0.05 O exhibited the highest photocatalytic degradation efficiency and can degrade 99.19% rhodamine B solution after 20 min under UV light. Furthermore, ZIF-8@Zn 0.95 Ni 0.05 O exhibits high stability. After five repeated cycles, its photocatalytic activity remains at 97.43%.Fig. 9 The schematic illustration of ZIF-8@Zn 0.95 Ni 0.05 O for degradation of RhB under UV light. 42034 | RSC Adv., 2017, 7, 42030-42035 This journal is
In this contribution, the azo dye (E)-1-(4-((4-(phenylamino)phenyl)diazenyl) phenyl)ethanone (DPA) was combined with reduced graphene oxide (RGO) for the electrochemical modification of a pencil graphite electrode (RGO/DPA/PGE) surface. A series of electrochemical measurements were used for the characterization of the modified electrode surfaces. At the modified electrode, nicotine was irreversibly reduced. An obvious increase was observed in the reductive peak current of nicotine at the modified electrode, indicating the capability of the RGO/DPA composite to increase the electron transfer rate. The current was found proportional to the nicotine concentration in a range of 31 to 1900 μM, and the limit of detection (LOD) was calculated as 7.6 μM.
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