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Synthesis and Exfoliation of Co2+−Fe3+ Layered Double Hydroxides: An Innovative Topochemical Approach
Abstract
This paper describes a topochemical synthetic approach to Co2+-Fe3+ layered double hydroxides (LDHs). Micrometer-sized hexagonal platelets of brucite-like Co2/3Fe1/3(OH)2 were first prepared by a homogeneous precipitation of an aqueous solution of divalent cobalt and ferrous ions through hexamethylenetetramine (HMT) hydrolysis under a nitrogen gas atmosphere. A subsequent oxidative intercalation process, by the action of iodine (I2) in chloroform (CHCl3), transformed the precursory brucite-like Co2+-Fe2+ hydroxides into hydrotalcite-like Co2+-Fe3+ LDHs, in which the oxidization of Fe2+ into Fe3+ induced positive charges to the octahedral hydroxyl layers while anions (I-) were intercalated into the interlayer space. Co2+-Fe3+ LDHs inherited the high crystallinity and hexagonal platelet morphology from their brucite-like precursor due to the topotactic nature of the transformation, which was verified by abundant microscopic and spectroscopic characterizations. After a normal ion-exchange process, Co2+-Fe3+ LDHs accommodating perchlorate anions were exfoliated into unilamellar nanosheets in formamide by an ultrasonic treatment.
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Cited by
Recent Progress in Cobalt‐Based Heterogeneous Catalysts for Electrochemical Water Splitting
Wang, J., Cui, W., Liu, Q., Xing, Z., Asiri, A. M., & Sun, X. (2016) · Advanced Materials · doi:10.1002/adma.201502696 · Cited by 2,446
Two‐Dimensional Polymers: Just a Dream of Synthetic Chemists?
Sakamoto, J., van Heijst, J., Lukin, O., & Schlüter, A. D. (2009) · Angewandte Chemie International Edition · doi:10.1002/anie.200801863 · Cited by 734
Interface-Assisted Synthesis of 2D Materials: Trend and Challenges
Dong, R., Zhang, T., & Feng, X. (2018) · Chemical Reviews · doi:10.1021/acs.chemrev.8b00056 · Cited by 710
Zeng, M., Xiao, Y., Liu, J., Yang, K., & Fu, L. (2018) · Chemical Reviews · doi:10.1021/acs.chemrev.7b00633 · Cited by 574
Ge, X., Gu, C., Wang, X., & Tu, J. (2017) · Journal of Materials Chemistry A · doi:10.1039/c7ta01659j · Cited by 372
Metadata
- Authors
- Ma, R., Liu, Z., Takada, K., Iyi, N., Bando, Y., & Sasaki, T.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2007-03-30
- Volume
- 129
- Issue
- 16
- Pages
- 5257-5263
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2077716649
- Cited by
- 392
- References
- 0
- FWCI
- 11.52
- Type
- journal article
- Language
- en
- Open access
- closed
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- Ma, R., Liu, Z., Takada, K., Iyi, N., Bando, Y., & Sasaki, T. (2007). Synthesis and Exfoliation of Co2+−Fe3+ Layered Double Hydroxides: An Innovative Topochemical Approach. Journal of the American Chemical Society. https://doi.org/10.1021/ja0693035
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