XU Min-hong, PAN Guo-xiang, CHEN Hai-feng, WANG Kun-yan, TONG Yanhua

(Department of Materials Chemistry, Huzhou University, Huzhou 313000, China)

Abstract: Based on Ni/Al hydrotalcite (NiAl-LDHs), catalyst NiPc/NiAl-LDHs loaded aqueous nickel tetracarboxylphthalocyanine (NiPc) was synthesized using a coprecipitation method. Structures, morphologies and thermal properties of the phthalocyanine derivatives and catalyst were characterized by XRD, FT-IR, UV-Vis, TG-DTA and SEM. Results show that although the NiPc is introduced on NiAl-LDHs, the crystal structure and thermal stability of NiAl-LDHs are unchanged. Photocatalytic oxidation degradation of methyl orange (MO) in the NiPc/NiAl-LDHs/H2O2 system lasted for 3 hours. The residual rate of MO was 16.33 % under the the conditions of MO being 10 mg/L 25 mL, pH value of 3, and dosage of H2O2 being 50 μL. The NiPc/NiAl-LDHs/H2O2 system has good photocatalytic oxidation activity for removing MO when the pH value of MO solution is in the range of 3－7. Furthermore, the process of photocatalytic oxidation degradation of MO involves an hydroxyl radical reaction.

Keywords: nickel phthalocyanine; Ni-Al hydrotalcite; photocatalytic; methyl orange; hydroxyl radical

Email: xumh123@163.com

ACTA MINERALOGICA SINICA Vol. 36, No. 2, 2016, Page 208-214