Chemical Journal of Chinese Universities ›› 2019, Vol. 40 ›› Issue (7): 1501-1509.doi: 10.7503/cjcu20180823

• Physical Chemistry • Previous Articles     Next Articles

Surfactant-assisted Formation of Nanoporous Pt Particles as Co-catalyst Loaded on P25 and Enhanced Photocatalytic Performance

JI Lei*(), GUO Fanzuo, WANG Kehan, WANG Lei   

  1. Provincial Key Laboratory of Oil and Gas Chemical Technology,College of Chemistry and Chemical Engineering,Northeast Petroleum University, Daqing 163318, China
  • Received:2018-12-10 Online:2019-06-28 Published:2019-07-09
  • Contact: JI Lei E-mail:jileiwipm@163.com
  • Supported by:
    † Supported by the Open Project of State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences(No.N-18-06).

Abstract:

Highly dispersed PtNi alloy particles were loaded on P25 as co-catalyst by chemical reduction in the presence of surfactant polyvinylpyrrolidone(PVP) and octoxinol(Triton X-100). The PtNi alloy particles were then de-alloyed to remove Ni atoms of the alloy selectively to obtain Pt nanoparticles having surface nanoscale hollow pore structure. The obtained sample showed an excellent activity for degrading the methylene blue(MB) dye and photocatalytic hydrogen production as compared with the case without the use of surfactant. This beneficial effect was ascribed to the following key factors: (1) the nanoporous structure increased surface area and active sites for H2 production; (2) longer active site residence time of photogenerated electrons and reactants which is attributed to a confinement effect within the nanoporous structures. At the same time, the experimental results show that OH· and ·O2- are the main active species of the photocatalytic degradation of MB.

Key words: Photocatalysis, Surfactant, Porous Pt, De-alloying, Cocatalyst

CLC Number: