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Nanocasted synthesis of magnetic mesoporous iron cerium bimetal oxides (MMIC) as an efficient heterogeneous Fenton-like catalyst for oxidation of arsenite.
J Hazard Mater. 2015 Apr 28; 287:225-33.JH

Abstract

Magnetic mesoporous iron cerium bimetal oxides (MMIC) with large surface area and pore volume was synthesized via the hard template approach. This obtained MMIC was easily separated from aqueous solution with an external magnetic field and was proposed as a heterogeneous Fenton-like catalyst for oxidation of As(III). The MMIC presented excellent catalytic activity for the oxidation of As(III), achieving almost complete oxidation of 1000ppb As(III) after 60min and complete removal of arsenic species after 180min with reaction conditions of 0.4g/L catalyst, pH of 3.0 and 0.4mM H2O2. Kinetics analysis showed that arsenic removal followed the pseudo-first order, and the pseudo-first-order rate constants increased from 0.0014min(-1) to 0.0548min(-1) as the H2O2 concentration increased from 0.04mM to 0.4mM. On the basis of the effects of XPS analysis and reactive oxidizing species, As(III) in aqueous solution was mainly oxidized by OH radicals, including the surface-bound OHads generated on the MMIC surface which were involved in Fe(2+) and Ce(3+), and free OHfree generation by soluble iron ions which were released from the MMIC into the bulk solution, and the generated As(V) was finally removed by MMIC through adsorption.

Authors+Show Affiliations

State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China. Electronic address: zhangyalei@tongji.edu.cn.College of Civil Engineering, Tongji University, Shanghai 200092, China.State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

25661169

Citation

Wen, Zhipan, et al. "Nanocasted Synthesis of Magnetic Mesoporous Iron Cerium Bimetal Oxides (MMIC) as an Efficient Heterogeneous Fenton-like Catalyst for Oxidation of Arsenite." Journal of Hazardous Materials, vol. 287, 2015, pp. 225-33.
Wen Z, Zhang Y, Dai C, et al. Nanocasted synthesis of magnetic mesoporous iron cerium bimetal oxides (MMIC) as an efficient heterogeneous Fenton-like catalyst for oxidation of arsenite. J Hazard Mater. 2015;287:225-33.
Wen, Z., Zhang, Y., Dai, C., & Sun, Z. (2015). Nanocasted synthesis of magnetic mesoporous iron cerium bimetal oxides (MMIC) as an efficient heterogeneous Fenton-like catalyst for oxidation of arsenite. Journal of Hazardous Materials, 287, 225-33. https://doi.org/10.1016/j.jhazmat.2015.01.065
Wen Z, et al. Nanocasted Synthesis of Magnetic Mesoporous Iron Cerium Bimetal Oxides (MMIC) as an Efficient Heterogeneous Fenton-like Catalyst for Oxidation of Arsenite. J Hazard Mater. 2015 Apr 28;287:225-33. PubMed PMID: 25661169.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Nanocasted synthesis of magnetic mesoporous iron cerium bimetal oxides (MMIC) as an efficient heterogeneous Fenton-like catalyst for oxidation of arsenite. AU - Wen,Zhipan, AU - Zhang,Yalei, AU - Dai,Chaomeng, AU - Sun,Zhen, Y1 - 2015/01/29/ PY - 2014/11/15/received PY - 2015/01/12/revised PY - 2015/01/28/accepted PY - 2015/2/10/entrez PY - 2015/2/11/pubmed PY - 2016/1/30/medline KW - Bimetal oxides KW - HPLC–ICP–MS KW - Heterogeneous catalyst KW - MMIC SP - 225 EP - 33 JF - Journal of hazardous materials JO - J Hazard Mater VL - 287 N2 - Magnetic mesoporous iron cerium bimetal oxides (MMIC) with large surface area and pore volume was synthesized via the hard template approach. This obtained MMIC was easily separated from aqueous solution with an external magnetic field and was proposed as a heterogeneous Fenton-like catalyst for oxidation of As(III). The MMIC presented excellent catalytic activity for the oxidation of As(III), achieving almost complete oxidation of 1000ppb As(III) after 60min and complete removal of arsenic species after 180min with reaction conditions of 0.4g/L catalyst, pH of 3.0 and 0.4mM H2O2. Kinetics analysis showed that arsenic removal followed the pseudo-first order, and the pseudo-first-order rate constants increased from 0.0014min(-1) to 0.0548min(-1) as the H2O2 concentration increased from 0.04mM to 0.4mM. On the basis of the effects of XPS analysis and reactive oxidizing species, As(III) in aqueous solution was mainly oxidized by OH radicals, including the surface-bound OHads generated on the MMIC surface which were involved in Fe(2+) and Ce(3+), and free OHfree generation by soluble iron ions which were released from the MMIC into the bulk solution, and the generated As(V) was finally removed by MMIC through adsorption. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/25661169/Nanocasted_synthesis_of_magnetic_mesoporous_iron_cerium_bimetal_oxides__MMIC__as_an_efficient_heterogeneous_Fenton_like_catalyst_for_oxidation_of_arsenite_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(15)00076-X DB - PRIME DP - Unbound Medicine ER -