Facile fabrication of Pd nanoparticle/Pichia pastoris catalysts through adsorption-reduction method: A study into effect of chemical pretreatment

被引：14

作者：

Chen, Huimei ^{[1
]}

Huang, Dengpo ^{[2
]}

Lin, Liqin ^{[1
]}

Odoom-Wubah, Tareque ^{[2
]}

Huang, Jiale ^{[2
]}

Sun, Daohua ^{[2
]}

Li, Qingbiao ^{[1
,2
,3
]}

机构：

[1] Xiamen Univ, Coll Environm & Ecol, Environm Sci Res Ctr, Xiamen 361005, Peoples R China

[2] Xiamen Univ, Coll Chem & Chem Engn, Dept Chem & Biochem Engn, Xiamen 361005, Peoples R China

[3] Quanzhou Normal Univ, Coll Chem & Life Sci, Quanzhou 362000, Peoples R China

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2014年 / 433卷

基金：

中国国家自然科学基金;

关键词：

Adsorption; Chemical modification; Palladium nanoparticles; 4-Nitrophenol; GOLD NANOPARTICLES; DESULFOVIBRIO-DESULFURICANS; BIOINORGANIC CATALYST; SILVER NANOPARTICLES; METAL NANOPARTICLES; FORMATION MECHANISM; PALLADIUM; DEHALOGENATION; HYDROGENATION; RECOVERY;

D O I：

10.1016/j.jcis.2014.07.038

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Based on rapid adsorption and incomplete reduction in Pd (II) ions by yeast, Pichia pastoris (P. pastoris) GS115, the effects of pretreatment on adsorption and reduction of Pd (II) ions and the catalytic properties of Pd NP/P. pastoris catalysts were studied. Interestingly, the results showed that the adsorption ability of the cells for Pd (II) ions was greatly enhanced after they were pretreated with aqueous HCl, aqueous NaOH and methylation of amino group. For the reduction in the adsorbed Pd (II) ions, more slow reduction rates by pretreated P. pastoris cells were displayed compared with the cells without pretreatment. Using the reduction of 4-nitrophenol as a model reaction, the Pd NP/P. pastoris catalysts based on the cells after pretreatment with aqueous HCl, aqueous NaOH and methylation of amino group exhibited higher stability than the unpretreated cells. The enhanced stability of the Pd catalysts can be attributed to smaller Pd NPs, better dispersion of the Pd NPs, and stronger binding forces of the pretreated P. pastoris for preparing the Pd NPs. This work exemplifies enhancing the stability of Pd catalysts through pretreatments. (C) 2014 Elsevier Inc. All rights reserved.

引用

页码：204 / 210

页数：7

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