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Efficient charge transfer in aluminum-cobalt layered double hydroxide derived from Co-ZIF for enhanced catalytic degradation of tetracycline through peroxymonosulfate activation

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成果类型:
期刊论文
作者:
Cao, Jiao;Sun, Saiwu;Li, Xin;Yang, Zhaohui*;Xiong, Weiping;Wu, You;Jia, Meiying;Zhou, Yaoyu;Zhou, Chengyun;Zhang, Yanru
通讯作者:
Yang, Zhaohui
作者机构:
[Yang, Zhaohui; Cao, Jiao; Jia, Meiying; Zhang, Yanru; Wu, You; Sun, Saiwu; Xiong, Weiping; Zhou, Chengyun; Li, Xin] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
[Yang, Zhaohui; Cao, Jiao; Jia, Meiying; Zhang, Yanru; Wu, You; Sun, Saiwu; Xiong, Weiping; Zhou, Chengyun; Li, Xin] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Peoples R China.
[Zhou, Yaoyu] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.
通讯机构:
[Yang, Zhaohui] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
语种:
英文
关键词:
Aluminum-cobalt layered double hydroxide (AlCo-LDH);Cobalt zeolitic imidazolate framework (Co-ZIF);PMS activation;Tetracycline (TC);Actual wastewater
期刊:
Chemical Engineering Journal
ISSN:
1385-8947
年:
2019
卷:
382
期:
Volume 382
页码:
122802-
文献类别:
WOS:Article
所属学科:
WOS学科类别:Engineering, Chemical;Engineering, Environmental
入藏号:
基金类别:
National Natural Science Foundation of ChinaNational Natural Science Foundation of China [51578223, 51521006]; Key Research and Development Program of Hunan Province [2017SK2242]
机构署名:
本校为其他机构
院系归属:
资源环境学院
摘要:
In consideration of the complex synthesis of layered double hydroxides (LDHs), a simple and efficient strategy was needed to design and fabricate LDHs with high performance. In this study, aluminum-cobalt layered double hydroxide (AlCo-LDH) with uniformly distributed component was synthesized by in-situ etching of cobalt zeolitic imidazolate framework (Co-ZIF) at room temperature. The obtained AlCo-LDH showed high catalysis performance of tetracycline (TC) degradation via the activation of peroxymonosulfate (PMS). The removal efficiency can reach to 92.3% within 5 min and 49.1% of TOC removal efficiency could be obtained in 30 min. Moreover, the degradation rate constants of AlCo-LDH/PMS system (0.980 min(-1)) was about 16.6 times higher than Co-ZIF/PMS system (0.059 min(-1)). The unique hydrotalcite-like layered structure of AlCo-LDH with large surface area and volume made TC molecules diffused and interacted with the reaction sites more easily. More importantly, the higher content of Al ions in AlCo-LDH catalyst helped the low content of Co ions to activate PMS. The forming process of AlCo-LDH and the TC degradation mechanisms were investigated. The quenching experiments combined with electron paramagnetic resonance (EPR) analysis showed the SO4 center dot- and O-1(2) radicals were the main reactive species for TC degradation. Moreover, the AlCo-LDH catalyst was stable in water for the negligible leaking of metal ions. Significantly, the AlCo-LDH/PMS system was effective and almost unaffected by pH values, organic and inorganic matters in water. In addition, high removal efficiencies were achieved in various real samples by the AlCo-LDH/PMS system. This work provided a novel and facile route to synthesis advanced MOF-derived LDHs catalyst with high performance in remediation of actual wastewater.
参考文献:
Anipsitakis GP, 2003, ENVIRON SCI TECHNOL, V37, P4790, DOI 10.1021/es0263792
Cao J, 2018, CHEM ENG J, V353, P126, DOI 10.1016/j.cej.2018.07.060
Cao JY, 2019, CHEM ENG J, V364, P45, DOI 10.1016/j.cej.2019.01.113
Chen RZ, 2013, CHEM COMMUN, V49, P9500, DOI 10.1039/c3cc44342f
Chen S, 2019, CHEM ENG J, V370, P1087, DOI 10.1016/j.cej.2019.03.282

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