SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2020, Vol. 28 ›› Issue (5): 1334-1343.DOI: 10.1016/j.cjche.2020.02.014

• Catalysis, Kinetics and Reaction Engineering • 上一篇    下一篇

Bio-synthesized palladium nanoparticles using alginate for catalytic degradation of azo-dyes

Yi Xiong1, Liping Huang1, Sakil Mahmud1,2,3, Feng Yang1, Huihong Liu1   

  1. 1 College of Chemistry and Chemical Engineering, Hubei Key Laboratory of Biomass Fibers and Eco-dyeing&Finishing, Wuhan Textile University, Wuhan 430200, China;
    2 Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;
    3 University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2019-10-18 修回日期:2019-12-23 出版日期:2020-05-28 发布日期:2020-07-29
  • 通讯作者: Sakil Mahmud, Huihong Liu
  • 基金资助:
    The authors thank the kind support of this work from Key Laboratory of Biomass Fibers & Eco-Dyeing & Finishing, Hubei Province (STRZ2019015) and the Innovation Platform Projects of Wuhan Textile University (183052).

Bio-synthesized palladium nanoparticles using alginate for catalytic degradation of azo-dyes

Yi Xiong1, Liping Huang1, Sakil Mahmud1,2,3, Feng Yang1, Huihong Liu1   

  1. 1 College of Chemistry and Chemical Engineering, Hubei Key Laboratory of Biomass Fibers and Eco-dyeing&Finishing, Wuhan Textile University, Wuhan 430200, China;
    2 Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;
    3 University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2019-10-18 Revised:2019-12-23 Online:2020-05-28 Published:2020-07-29
  • Contact: Sakil Mahmud, Huihong Liu
  • Supported by:
    The authors thank the kind support of this work from Key Laboratory of Biomass Fibers & Eco-Dyeing & Finishing, Hubei Province (STRZ2019015) and the Innovation Platform Projects of Wuhan Textile University (183052).

摘要: Palladium nanoparticles (PdNPs) were synthesized in a green way using sodium alginate functioning as both reductant and stabilizer. The formation of as-synthesized PdNPs was supervised by Ultraviolet-visible (UV-Vis) spectroscopy and confirmed by the surface plasmon resonance (SPR) band. The effect of several synthesis factors such as precursor ratio, solution pH, reaction time, and temperature were investigated by the factorial design of experiments in order to optimize the experimental conditions. The optimal synthesis parameters were achieved by heating 1.0 ml of 1.0% sodium alginate (SA), 3.0 ml of 10-2 mol·L-1 H2PdCl4 at 80℃ for a period of 30 min in a neutral reaction medium (pH=6). High-resolution transmission electron microscope (HRTEM), energy dispersive X-ray (EDX) spectroscopy, selected area electron diffraction (SAED) pattern, X-ray powder diffraction (XRD), and dynamic light scattering (DLS) were used to confirm the uniform spherical shapes and high crystallinity of PdNPs with average particle size of (2.12 ±1.42) nm. The SEM images show the distribution of PdNPs presented among the SA. FTIR spectra indicate that SA is a good capping agent to stabilize PdNPs for a long time. The catalytic degradation of model azo-dyes such as mono-azo (Cibacron Yellow FN-2R) and di-azo (Cibacron Deep Red S-B) were confirmed the catalytic activity of PdNPs. The PdNPs can accelerate the degradation rate by more than 80 and 10 times respectively as confirmed by kinetics constant (k) values.

关键词: Palladium nanoparticles, sodium alginate, Green synthesis, Azo dyes, Catalysis

Abstract: Palladium nanoparticles (PdNPs) were synthesized in a green way using sodium alginate functioning as both reductant and stabilizer. The formation of as-synthesized PdNPs was supervised by Ultraviolet-visible (UV-Vis) spectroscopy and confirmed by the surface plasmon resonance (SPR) band. The effect of several synthesis factors such as precursor ratio, solution pH, reaction time, and temperature were investigated by the factorial design of experiments in order to optimize the experimental conditions. The optimal synthesis parameters were achieved by heating 1.0 ml of 1.0% sodium alginate (SA), 3.0 ml of 10-2 mol·L-1 H2PdCl4 at 80℃ for a period of 30 min in a neutral reaction medium (pH=6). High-resolution transmission electron microscope (HRTEM), energy dispersive X-ray (EDX) spectroscopy, selected area electron diffraction (SAED) pattern, X-ray powder diffraction (XRD), and dynamic light scattering (DLS) were used to confirm the uniform spherical shapes and high crystallinity of PdNPs with average particle size of (2.12 ±1.42) nm. The SEM images show the distribution of PdNPs presented among the SA. FTIR spectra indicate that SA is a good capping agent to stabilize PdNPs for a long time. The catalytic degradation of model azo-dyes such as mono-azo (Cibacron Yellow FN-2R) and di-azo (Cibacron Deep Red S-B) were confirmed the catalytic activity of PdNPs. The PdNPs can accelerate the degradation rate by more than 80 and 10 times respectively as confirmed by kinetics constant (k) values.

Key words: Palladium nanoparticles, sodium alginate, Green synthesis, Azo dyes, Catalysis