Acta Phys. -Chim. Sin. ›› 2008, Vol. 24 ›› Issue (06): 992-996.doi: 10.1016/S1872-1508(08)60045-5

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Binding Characteristics of CoPc/SnO2 by In-situ Process and Photocatalytic Activity under Visible Light Irradiation

PAN Hai-Bo; WANG Fang; HUANG Jin-Ling; CHEN Nai-Sheng   

  1. College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350002, P. R. China
  • Received:2008-02-18 Revised:2008-03-07 Published:2008-06-03
  • Contact: PAN Hai-Bo

Abstract: Cobalt phthalocyanine (CoPc) was synthesized and self-assembled on the surface of nanoscale tin dioxide (SnO2) by in-situ process, marked as i, and Co-O interaction was verified to conjugate axially between macromolecule (CoPc) and SnO2 in CoPc/SnO2(i). The results indicated that the binding constant of CoPc/SnO2(i) was two-order higher than that of CoPc/SnO2(d) synthesized by dipping process, marked as d, while the numbers of binding sites were comparable in both samples. The degradation rate in the photocatalytic activity of CoPc/SnO2(i) was 32.5% higher than that of CoPc/SnO2(d) under visible-light irradiation for 150 min due to the effective electron separation and energy injection from LUMO of CoPc to conduction band of SnO2 for CoPc/SnO2(i) based on the strong interaction between CoPc and SnO2. The degradation recyclability of CoPc/SnO2(i) retained 48.8% in 10 times under the same circular photocatalytic process.

Key words: In-situ synthesis, Binding characteristics, Photocatalysis under visible light irradiation, Sensitized mechanism, Stability


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