Chem. J. Chinese Universities ›› 2018, Vol. 39 ›› Issue (6): 1255.doi: 10.7503/cjcu20170746

• Physical Chemistry • Previous Articles     Next Articles

Antioxidant Property of Catalyzed Lignosulfonate Using S2O82-/ZrO2 Doped Cerium as Catalysts

ZHANG Yan2,*(), ZHANG Shengming1, FANG Guizhen1   

  1. 1. School of Material Science and Engineering
    2. School of Science, Northeast Forestry University, Harbin 150040, China
  • Received:2017-11-03 Online:2018-06-10 Published:2018-04-25
  • Contact: ZHANG Yan E-mail:zhangyan0727@nefu.edu.cn
  • Supported by:
    † Supported by the Basic Science Special Foundation of Central University, China(No. 2572015BB16) and the National Natural Science Foundation of China(No.31170542).

Abstract:

To improve catalysis activity of S2O82-/ZrO2 for the hydrogenation of lignosulfonate, rare earth cerium was doped onto the catalysts. Through Hammett indicator method and the determination of X-ray small diffraction(XRD), specific surface area(SBET) and sulfur content, the influence of different Cerium doping ratio on the acid strength of solid acid, carrier crystal type and SBET were discussed. Doping cerium promoted to form amorphous ZrO2 crystal, contributed to increasing SBET and sulfur content for solid acid enhancement. The contents of phenol hydroxyl and total hydroxyl were considered as a fractions of active groups in lignin, increased from 1.52% and 2.31% to 3.35% and 10.35%, combined with the data of 1H nuclear magnetic spectra(1H NMR). The results proved that the cerium doping improved S2O82-/ZrO2 catalytic properties through increasing the hydroxyl groups content of lignosulfonate. It confirmed that the catalyst coping Cerium was an excellent catalyst for hydrogenation of lignosulfonate dispersing in water. And hydroxylated ligno-sulfonate has good antioxidant capacity.

Key words: Coping cerium, Rare Earth solid acid, Lignonsulfonate, Antioxidant

CLC Number: 

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