铂纳米颗粒在嗜盐碱单胞菌上的生物还原沉积

Bioreductive deposition of platinum nanoparticles on the bacterium Shewanella algae.

作者信息

Konishi Yasuhiro, Ohno Kaori, Saitoh Norizoh, Nomura Toshiyuki, Nagamine Shinsuke, Hishida Hajime, Takahashi Yoshio, Uruga Tomoya

机构信息

Department of Chemical Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Sakai, Osaka 599-8531, Japan.

出版信息

J Biotechnol. 2007 Feb 20;128(3):648-53. doi: 10.1016/j.jbiotec.2006.11.014. Epub 2006 Nov 29.

DOI:10.1016/j.jbiotec.2006.11.014

PMID:17182148

Abstract

An environmentally friendly method using the metal ion-reducing bacterium Shewanella algae was proposed to deposit platinum nanoparticles. Resting cells of S. algae were able to reduce aqueous PtCl(6)(2-) ions into elemental platinum at room temperature and neutral pH within 60min when lactate was provided as the electron donor. Biogenic platinum nanoparticles of about 5nm were located in the periplasm--a preferable, cell surface location for easy recovery of biogenic nanoparticles.

摘要

提出了一种利用金属离子还原菌——海藻希瓦氏菌的环保方法来沉积铂纳米颗粒。当以乳酸作为电子供体时，海藻希瓦氏菌的静止细胞能够在室温及中性pH条件下于60分钟内将水溶液中的六氯铂酸根离子（PtCl₆²⁻）还原为单质铂。约5纳米的生物源铂纳米颗粒位于周质中，这是一个理想的细胞表面位置，便于生物源纳米颗粒的回收。