Release Time:2019-03-12  Hits:

Indexed by: Journal Article

Date of Publication: 2017-02-01

Journal: ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH

Included Journals: PubMed、SCIE

Volume: 24

Issue: 6

Page Number: 5249-5258

ISSN: 0944-1344

Key Words: Bimetallic nanoparticles; Palladium; Platinum Catalyst; Shewanella oneidensisMR-1; 4-Nitrophenol

Abstract: Bimetallic nanoparticles are generally believed to have improved catalytic activity and stability due to geometric and electronic changes. In this work, biogenic-Pd (bio-Pd), biogenic-Pt (bio-Pt), and biogenic-PdPt (bio-PdPt) nanoparticles were synthesized by Shewanella oneidensis MR-1 in the absence or presence of quinone. Compared with direct microbial reduction process, the addition of anthraquinone-2,6-disulfonate (AQDS) could promote the reduction efficiency of Pd(II) or/and Pt(IV) and result in decrease of particles size. All kinds of nanoparticles could catalyze 4-nitrophenol reduction by NaBH4 and their catalytic activities took the following order: bio-PdPt (AQDS) similar to bio-PdPt > bio-Pd (AQDS) > bio-Pd > bio-Pt (AQDS) similar to bio-Pt. Moreover, the bio-PdPt (AQDS) nanoparticles could be reused for 6 cycles. We believe that this simple and efficient biosynthesis approach for synthesizing bimetallic bio-PdPt nanocatalysts is important for preparing active and stable catalysts.