高等学校化学学报

高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (9): 1452.

• 研究快报 • 上一篇    下一篇

细菌吸附还原贵金属离子特性及表征

傅锦坤1, 张伟德1, 刘月英2, 林种玉1, 姚炳新2, 翁绳周2, 曾金龙1   

  1. 1. 厦门大学固体表面物理化学国家重点实验室, 化学系, 厦门 361005;
    2. 厦门大学固体表面物理化学国家重点实验室, 生物系, 厦门 361005
  • 收稿日期:1999-01-13 出版日期:1999-09-24 发布日期:1999-09-24
  • 通讯作者: 傅锦坤.男.58岁,副教授.
  • 作者简介:傅锦坤,男,58岁,副教授.
  • 基金资助:

    国家自然科学基金(批准号:29876026;2974301)资助课题;固体表面物理化学国家重点实验室资助

Characterization of Adsorption and Reduction of Noble Metal Ions by Bacteria

FU Jin-Kun1, ZHNAG Wei-De1, LIU Yue-Ying2, LIN Zhong-Yu1, YAO Bing-Xin2, WENG Sheng-Zhou2, ZENG Jin-Long1   

  1. 1. State Key Laboratory for Physical Chemistry of Solid Surfaces, Deparstment of Chemistry, Xiamen University, Xiamen 361005, China;
    2. Department of Biology, Xiamen University, Xiamen 361005, China
  • Received:1999-01-13 Online:1999-09-24 Published:1999-09-24

PDF (PC)

被引次数

42

关键词: 细菌, 贵金属, 还原

Abstract: The biomass D01 was screened from the soil of mining area and it was identified as Bacillus megatherium.It is able to adsorb and reduce the noble metal ions such as Pd2+,Au3+and Ag+etc.at room temperature.At pH3.5, the adsorbed ratio were 93.2%,99.5% and 98.1%, respectively within2h.In situ TEM images showed that the Au, Ag particles adsorbed on the cell wall grew up gradually.Some of the Au particles formed polyhedron particles, while some ones broke off from the cell.The particle size can be controlled to be several nano-meters to more than a hundred nano-meters.XPS and XRD results indicated that Au3+, Ag+and Pd2+could be reduce to metals much faster than Rh3+and Pt4+by Dol.Peaks at 3087 and 1664 cm-1in the IRspectra of D01 reduced gradually while interacting with metal ions, implying that metal ions were coordinated and reduced on the site of acylamide of D01.This is a promising method for preparation of metal catalysts with high dispersion and nano-meter sized metal particles.

Key words: Bacteria, Noble metal, Reduction

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