title: Influence of surface functionalization via chemical oxidation on the properties of carbon nanotubes.
abstract: The surface of carbon nanotubes (CNTs) was functionalized in different chemical oxidants, hydrogen peroxide, mixed concentrated HNO(3)/H(2)SO(4) and acidic KMnO(4) solution. The influences on the properties of CNTs were systematically investigated, such as the structure, the kinds and the contents of the formed surface oxygen-containing functional groups, the pH(PZC) values and the surface hydrophilicity using XRD, HREM, FTIR and chemical titration. The results show that the kinds and the contents of the surface oxygen-containing groups are dependent on the functionalization methods. The formation of the oxygen-containing groups can decrease pH(PZC) values and improve surface hydrophilicity of CNTs. The dispersion of the supported Pd-Pt particles on the functionalized CNTs and their catalytic activity in the profile reaction of naphthalene hydrogenation to tetralin are both promoted due to the presence of these oxygen-containing groups.
authors.affiliation: Department of Catalysis Science & Technology, School of Chemical Engineering, Tianjin University, Tianjin 300072, China.cjlchen@yahoo.com
authors.forename: Jiuling
authors.initials: J
authors.lastname: Chen
authors.forename: Qinghai
authors.initials: Q
authors.lastname: Chen
authors.forename: Qing
authors.initials: Q
authors.lastname: Ma