Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (10): 87-93.doi: 10.13475/j.fzxb.20191202907

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Photosensitizers sensitized Cu-organic framework for highly efficient photocatalytic degradation of Reactive Dark Blue K-R

LI Qing1(), GUAN Binbin1, WANG Ya1, LIU Tianhui1, ZHANG Luohong1, FAN Zenglu2   

  1. 1. College of Environmental & Chemical Engineering, Xi'an Polytechnic University, Xi'an, Shaanxi 710048, China
    2. Key Laboratory of Functional Textile Materials and Products, Ministry of Education, Xi'an Polytechnic University, Xi'an, Shaanxi 710048, China
  • Received:2019-12-11 Revised:2020-06-24 Online:2020-10-15 Published:2020-10-27

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Abstract:

Three-dimensional porous Cu-organic skeleton material (Cu-MOF) was synthesized from the reaction of copper nitrate and 4,4',4″-[1,3,5-benzenetriyltris(carbonylimino)] trisbenzoic acid (H3L) to address the challenge of water pollution caused by reactive dyes containing wastewater by virtue of photocatalytic degradation. The thermal weight loss properties of the Cu-MOF were studied by thermal weight loss analysis and the powder X-ray diffraction analysis to confirm its structural characteristics. Then, the Cu-MOF was sensitized by methyl orange (MO) and methylene blue (MB) with different visible light absorption capacity, providing two kinds of composites to improve the photocatalytic degradation efficiency. The studies reveal that Cu-MOF and its composites MO-Cu-MOF and MB-Cu-MOF (10 mg) performs the visible photocatalytic degradation efficiency of 42.4%, 76.2% and 88.4%, with corresponding photocatalytic rate constants of 0.029 h-1, 0.082 h-1 and 0.122 h-1, respectively, towards Reactive Dark Blue K-R(RB13) and the optimal pH value is 8. After five cycles of photocatalytic degradation, the degradation efficiency of MB-Cu-MOF towards RB13 still reaches 75.1%.

Key words: Cu-organic framework, sensitization, visible photocatalytic degradation, reactive dye, dyeing waste water

CLC Number: 

  • TS190.2

Fig.1

Coordination self-assembly of Cu-MOF. (a) Synthesis reaction of Cu-MOF; (b) Single network and double interpenetration structure of Cu-MOF"

Fig.2

TGA plot of compound Cu-MOF"

Fig.3

PXRD patterns of single crystal and bulk samples"

Fig.4

Adsorption of Cu-MOF towards MB and MO and changes of absorbance for dyes"

Fig.5

Absorbance during photocatalytic degradation towards RB13 for Cu-MOF(a), MO-Cu-MOF(b) and MB-Cu-MOF (c)"

Fig.6

Degradation efficiency during photocatalytic degradation towards RB13 for Cu-MOF(a), MO-Cu-MOF(b) and MB-Cu-MOF (c)"

Fig.7

Degradation rate during photocatalytic degradation towards RB13 for Cu-MOF(a), MO-Cu-MOF(b) and MB-Cu-MOF (c)"

Fig.8

Proposal mechanisms for sensitization of Cu-MOF and photocatalytic degradation towards RB13"

Fig.9

Photocatalytic cycle capacity of MB-Cu-MOF"

Fig.10

Influence of pH values on photocatalytic degradation efficiencies"

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