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Title: Degradation of Congo Red dye by a Fe2O3@CeO2-ZrO2/Palygorskite composite catalyst: Synergetic effects of Fe2O3

Journal Article · · Journal of Colloid and Interface Science
ORCiD logo [1];  [2];  [3]; ORCiD logo [2]
  1. Central South Univ., Changsha (China); Key Lab of Clay Mineral Functional Materials in China Building Materials Industry, Changsha (China); Univ. of Connecticut, Storrs, CT (United States)
  2. Central South Univ., Changsha (China); Key Lab of Clay Mineral Functional Materials in China Building Materials Industry, Changsha (China)
  3. Univ. of Connecticut, Storrs, CT (United States)

A newly designed Fe2O3@CeO2-ZrO2/Palygorskite heterogeneous Fenton catalyst with high degradation efficiency toward Congo Red (CR) is reported in this paper. The iron oxide (Fe2O3) was used as the originator of hydroxyl radicals (OH), CeO2-ZrO2 was used as an efficient matrix of Fe2O3 to enhance the oxidation performance, and the Palygorskite (Pal) played the role of substrate and adsorbent. A synergetic effect of the catalyst was realized by enhancing the adsorption capacity and dispersibility of CeO2-ZrO2 and Fe2O3 nanoparticles, and also due to charge transfer between these two species. The products were characterized by XRD, FTIR, SEM, TEM, XPS, VSM and nitrogen adsorption-desorption isotherms. The catalytic activities were evaluated in terms of many reaction parameters. The removal efficiency of CR was up to 95% on Fe2O3@CeO2-ZrO2/Pal under optimized conditions (Pal accounted for 30% of the catalyst mass fraction and Ce/Zr atoms molar ratio = 8:2, T = 30 °C, pH = 3.4, 4 g L-1 catalyst, 40 mM H2O2 and 500 mg/L CR), the product also has shown good reusability. Both α-Fe2O3 and CeO2-ZrO2 played important roles in the generation of hydroxyl radicals, which determined the catalytic efficiency of the composite catalyst. Fe2O3@CeO2-ZrO2/Pal was proven to be a promising candidate in the field of heterogeneous Fenton catalysis.

Research Organization:
Univ. of Connecticut, Storrs, CT (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division; National Natural Science Foundation of China (NSFC); National Science Fund for Distinguished Young Scholars; Natural Science Fund of Hunan Province; Innovation Driven Plan of Central South University; ShengHua Scholar Project of CSU; Strategic Priority Research Program of Central South University
Grant/Contract Number:
FG02-86ER13622; FG02-86ER13622.A000
OSTI ID:
1598179
Alternate ID(s):
OSTI ID: 1635963
Journal Information:
Journal of Colloid and Interface Science, Vol. 539, Issue C; ISSN 0021-9797
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 76 works
Citation information provided by
Web of Science

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