Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (12): 68-73.doi: 10.13475/j.fzxb.20190303606

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Preparation and application properties of wool-Fe complex-based heterogeneous Fenton photocatalysts

CUI Guixin1,2, DONG Yongchun1,3(), WANG Peng1   

  1. 1. School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China
    2. Zhejiang Technology Research Institute of CTA Co., Ltd., Shaoxing, Zhejiang 312071, China
    3. Key Laboratory of Advanced Textile Composites, Ministry of Education, Tiangong University, Tianjin 300387, China
  • Received:2019-03-13 Revised:2019-06-24 Online:2019-12-15 Published:2019-12-18
  • Contact: DONG Yongchun E-mail:teamdong@sina.cn

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Abstract:

To improve the recycling value of waste wool, three wool fibers with different diameters and scales structures were coordinated with Fe3+ ions for producing three wool-Fe complexes as heterogeneous Fenton photocatalysts for the oxidative degradation of azo dyes. The influence of reaction conditions and the diameter and scale thickness of wool fiber on Fe content and photocatalytic activity of the complexes was investigated. The results indicate that high Fe content and elevated temperature can enhance the coordination of the Fe3+ and wool, and the wool fiber with low scale thickness is coordinated easily with Fe3+ to form wool-Fe complex containing higher Fe content. The coordination of wool fiber with Fe3+ ions can be described by Lagergren pseudo-second-order kinetic model. The wool fiber with low scale thickness shows a slower coordination rate than the other two wool fiber. Three resulting wool-Fe complexes have a significant photocatalytic function on dye degradation. High Fe content and increased irradiation can enhance their photocatalytic activity. The complexes prepared from thin wool fiber exhibites stronger photocatalytic performance and low pH sensitivity.

Key words: waste wool, wool-Fe complex, scale structure, photocatalyst, dye degradation

CLC Number: 

  • TS195.9

Tab.1

Average diameter and scale thickness of three wool fibersμm"

羊毛编号 平均直径 平均鳞片厚度
wool-1 25.66 0.931 8
wool-2 36.47 0.956 0
wool-3 36.85 0.659 3

Fig.1

Coordination reaction of three wool fibers with Fe3+ and effect of CFe,0 QFe value. (a) wool-1; (b) wool-2; (c) wool-3; (d) Effect of CFe,0 on QFe value"

Fig.2

Effect of reaction temperature on QFe value of complexes"

Tab.2

Pseudo second-order adsorption kinetic model parameters for coordination of different wool with Fe3+"

羊毛
名称		 CFe,0 /
(mol·L-1)		 Qe /
(mmol·g-1)		 k/
(g·(mmol·min)-1)		 R2
wool-1 0.02 0.164 6 1.078 7 0.964 8
0.05 0.339 9 0.387 2 0.980 2
0.10 0.605 6 0.240 3 0.970 1
0.20 0.947 9 0.063 7 0.947 2
wool-2 0.02 0.176 5 0.368 7 0.984 4
0.05 0.311 0 0.366 3 0.984 5
0.10 0.551 8 0.163 6 0.984 2
0.20 0.811 5 0.085 3 0.931 7
wool-3 0.02 0.948 5 0.006 6 0.983 6
0.05 1.110 8 0.006 5 0.987 9
0.10 2.157 1 0.003 4 0.987 7
0.20 2.948 1 0.003 2 0.971 3

Fig.3

Changes in decoloration ratio of dye in presence of different wool-Fe complexes"

Fig.4

Relationship between QFe and D40 values"

Fig.5

Effect of pH on D40 values"

Fig.6

Changes in D40 values under different irradiation"

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