期刊
CHEMOSPHERE
卷 184, 期 -, 页码 849-856出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2017.06.069
关键词
TiO2@MgO-Fe2O3 photocatalyst; 2,4-Dichlorophenoxyacetic acid; Visible-light photodegradation; Hydrogen peroxide
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2017R1A2B4006388]
- National Research Foundation of Korea [2017R1A2B4006388, 22A20130012617] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A novel TiO2@MgO-Fe2O3 core-shell structure has been synthesized via a hydrolysis andco-precipitation method followed by calcination at 500 degrees C and has proven to be an efficient photocatalyst. The obtained TiO2@MgO-Fe2O3 core-shell was characterized by scanning electron microscopy, X-ray diffraction, and UV Vis diffused reflectance techniques. Its photocatalytic activity toward 2,4-dichlorophenoxyacetic acid (2,4-D) was investigated in aqueous solutions with and without visible light irradiation in the presence and absence of hydrogen peroxide. It was revealed that a strong electronic coupling exists between two components within the TiO2@MgO-Fe2O3 core-shell structure. The present findings clearly highlight that TiO2@MgO-Fe2O3 exhibits excellent photocatalytic activity under visible light irradiation in the presence of H2O2. More than 83% degradation of 2,4-D was observed within 240 min, at an initial concentration of 100 mg L-1 with 0.5 g of catalyst per liter. Moreover, the material showed high chemical stability after four consecutive experiments with no significant difference in the rate of photocatalytic degradation. Therefore, the results reported herein offer a green, low cost and highly efficient photo catalyst for environmental remediation. (C) 2017 Elsevier Ltd. All rights reserved.
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