• 文献标题:   Graphene quantum dot-phthalocyanine polystyrene conjugate embedded in asymmetric polymer membranes for photocatalytic oxidation of 4-chlorophenol
  • 文献类型:   Article
  • 作  者:   MAFUKIDZE DM, NYOKONG T
  • 作者关键词:   photodegradation, graphene quantum dot, phthalocyanine, polymer membrane
  • 出版物名称:   JOURNAL OF COORDINATION CHEMISTRY
  • ISSN:   0095-8972 EI 1029-0389
  • 通讯作者地址:   Rhodes Univ
  • 被引频次:   5
  • DOI:   10.1080/00958972.2017.1400664
  • 出版年:   2017

▎ 摘  要

The feasibility of using pi-pi stacking as a means of fixing unsubstituted Zn phthalocyanine (ZnPc) to a support prior to formation of photoactive polymer asymmetric membranes was explored. Stable ZnPc-graphene quantum dot-polystyrene conjugates (6.15 mu mol/g ZnPc loading) were synthesized and embedded in polystyrene membranes which proved to be photoactive with a singlet oxygen quantum yield of 0.43 in ethanol and 0.37 in water. The membranes also proved to be active in the photocatalytic oxidation of 4-chlorophenol in water where the reaction followed second-order kinetics. At 3.24 x 10(-4) mol L-1, the photo-oxidation of 4-chlorophenol was observed with a k(obs) of 35.9 L mol(-1) min(-1) and a half-life of 86 min. [GRAPHICS]