| Based on the previous research, iminodiacetic acid-functionalized poly(glycidyl methacrylate)/carbon fibers composite was prepared by electrochemically mediated atom transfer radical polymerization. Nickel (zinc) and aluminum layered double hydroxides was electro-deposited at CCFs (Ni(Zn)Al-LDHs/CCFs) firstly; Nickel (zinc)hexacyanoferrate was electro-deposited at Ni(Zn)Al-LDHs/CCFs in situ. As a result,one kind of heterogeneous composite based on Ni(Zn)Al-LDHs and Ni(Zn)HCF modified carbon fibers was obtained (Ni(Zn)HCF-LDHs/CCFs). The relatives materials were characterized by field emission scanning electron microscope (FE-SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (IR) and electrochemical techniques (EC). Both binary and ternary Ni(Zn)Al-LDHs show layered structure of hydrotalcite at Ni(Zn)Al-LDHs/CCFs. NiHCF particles show accumulational statue at NiHCF-LDHs/CCFs, and the size of ZnHCF is not uniform at ZnHCF-LDHs/CCFs, but NiZnHCF shows cubic structure with uniform distribution. The electro-catalysis of these composites was investigated towards water-soluble sulfide, respectively. In comparison with that of other materials, heterogeneous heterogeneous Ni(Zn)HCF-LDHs/CCFs shows excellent effect for the oxidation of water-soluble sulfide with the formation of polysulfide.Both binary and ternary Ni(Zn)Cr-LDHs were electro-deposited at the surface of CCFs (Ni(Zn)Cr-LDHs/CCFs). Ni(Zn)Cr-LDOs/CCFs mixed metal oxides could be obtained after heat treatment. The relative materials were characterized by FE-SEM,XRD and EC techniques. The further study proved that Ni/Cr-LDOs/CCFs showed much better pHotoelectric catalysis for oxidation of water-soluble sulfide. |
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