Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (10): 112-118.doi: 10.13475/j.fzxb.20210805808

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Photocatalytic synergistic efficiency of viscose fabric loaded with nitrogen carbon quantum dots/titanium dioxide

FENG Yan1,2,3, LI Liang1,2,4, LIU Shuping1,2,3, LI Shujing1,2,3, LIU Rangtong1,2,3()   

  1. 1. Henan Provincial Collaborative Innovation Center of Textile and Clothing, Zhengzhou, Henan 450007, China
    2. Henan Provincial Key Laboratory of Functional Textile Materials, Zhengzhou, Henan 450007, China
    3. College of Fashion Technology, Zhongyuan University of Technology, Zhengzhou, Henan 450007, China
    4. Textile College, Zhongyuan University of Technology, Zhengzhou, Henan 450007, China
  • Received:2021-08-13 Revised:2022-06-29 Online:2022-10-15 Published:2022-10-28
  • Contact: LIU Rangtong E-mail:ranton@126.com

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Abstract:

In order to improve the self-cleaning performance of clothing fabrics under sunlight, nitrogen-doped carbon quantum dots (N-CQDs) were prepared from citric acid and urea, and the composite photocatalytic textiles were created through hydrothermal treatment of viscose fabrics loaded with nitrogen-doped carbon quantum dots and nano titanium dioxide. The viscose fabrics were characterized by means of scanning electron microscope, infrared spectrometer, and ultraviolet-visible photometer, and heir optical absorption, photocatalytic degradation and stability were tested. The synergistic mechanism of degradation of Rhodamine B (RhB) by N-CQDs, TiO2 and their composite systems were studied. The results show that the decolorization rate of fabric loaded with N-CQDs/TiO2 is 76.5%, which is 49.1% higher than that of fabric loaded with TiO2, and the decolorization rate can still reach 62.34% after 6 cycles of photocatalytic degradation of RhB.

Key words: viscose fabric, nitrogen doped carbon quantum dots, titanium dioxide, solar photocatalytic degradation, synergistic mechanism

CLC Number: 

  • TS195.5

Fig.1

TEM image(a) and particle size distribution(b) of N-CQDs"

Fig.2

Macro photographs and SEM images of viscose fabrics. (a) Original sample(×10 000); (b) Fabrics loaded with TiO2(×15 000); (c) Fabrics loaded with N-CQDs(×150 000); (d) Fabrics loaded with N-CQDs/TiO2(×15 000)"

Fig.3

FT-IR spectra of N-CQDs powder and different samples. (a) N-CQDs powder; (b) Viscose fabric before and after finished"

Fig.4

XPS spectra of viscose fabric loaded with N-CQDs/TiO2. (a) Survey spectrum; (b) High-resolution N1s spectrum; (c) High-resolution C1s spectrum; (d) High-resolution O1s spectrum; (e) High-resolution Ti2p spectrum;(f) High-resolution Ti2p spectrum compared with different samples"

Fig.5

UV-Vis diffuse reflectance spectra of samples. (a) N-CQDs powder,TiO2 powder and different samples; (b) Samples loaded with different dopant levels of N-CQDs"

Fig.6

Relationship between decolorization rate and time of RhB degraded by photocatalysis of viscose fabrics. (a) Viscose fabrics before and after finished; (b) Samples loaded with N-CQDs/TiO2。"

Fig.7

Relationship between decolorization rate and cycle times of RhB degraded by repeated photocatalysis of samples loaded with N-CQDs/TiO2 or TiO2"

Fig.8

Schematic diagram of photocatalytic degradation of RhB by N-CQDs/TiO2"

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