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Impact of nanoceria shape on degradation of diethyl paraoxon: Synthesis, catalytic mechanism, and water remediation application.

التفاصيل البيبلوغرافية
العنوان: Impact of nanoceria shape on degradation of diethyl paraoxon: Synthesis, catalytic mechanism, and water remediation application.
المؤلفون: Zhan SW; Department of Chemistry, National Sun Yat-sen University, No. 70, Lien-hai Road, Gushan District, Kaohsiung, 80424, Taiwan., Tseng WB; Department of Chemistry, National Sun Yat-sen University, No. 70, Lien-hai Road, Gushan District, Kaohsiung, 80424, Taiwan; Department of College of Ecology and Resource Engineering, Wuyi University, Fujian, 354300, China., Tseng WL; Department of Chemistry, National Sun Yat-sen University, No. 70, Lien-hai Road, Gushan District, Kaohsiung, 80424, Taiwan; School of Pharmacy, Kaohsiung Medical University, No. 100, Shiquan 1st Road, Sanmin District, Kaohsiung, 80708, Taiwan. Electronic address: tsengwl@mail.nsysu.edu.tw.
المصدر: Environmental research [Environ Res] 2020 Sep; Vol. 188, pp. 109653. Date of Electronic Publication: 2020 May 22.
نوع المنشور: Journal Article; Research Support, Non-U.S. Gov't
اللغة: English
بيانات الدورية: Publisher: Elsevier Country of Publication: Netherlands NLM ID: 0147621 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1096-0953 (Electronic) Linking ISSN: 00139351 NLM ISO Abbreviation: Environ Res Subsets: MEDLINE
أسماء مطبوعة: Publication: <2000- > : Amsterdam : Elsevier
Original Publication: New York, Academic Press.
مواضيع طبية MeSH: Cerium* , Metal Nanoparticles*, Catalysis ; Gold ; Paraoxon ; Water
مستخلص: A series of nanomaterials have been demonstrated to be powerful for direct degradation of diethyl paraoxon (EP) to diethyl phosphate and 4-nitrophenol in aqueous solution. However, comparison of catalytic activity of different nanomaterials toward EP is rarely explored. In the present study, four different morphological nanoceria (cubes, rods, polyhedral, and spheres) were synthesized, characterized, and evaluated as a catalyst for the degradation of EP in comparison to other commercially available nanomaterials. Among the tested nanoceria, the cerium dioxide (CeO 2 ) nanopolyhedra possess the best catalytic activity toward the hydrolysis of EP owing to their abundant oxygen vacancy sites, optimal ratio of Ce(III) to Ce(IV), and specific exposed facets. Under the conditions of 0.2 M NH 3 /NH 4 Cl buffer and 25 °C, the CeO 2 nanopolyhedra catalyzed the reduction of EP to 4-nitrophenol with a >99% conversion at pH 8.0 for 50 h, at pH 10.0 for 12 h, and at pH 12.0 for 2.5 h. The catalytic degradation of nearly 100% EP in NH 3 /NH 4 Cl buffer (pH 10.0) at 25 °C is in the decreasing order of CeO 2 nanopolyhedra > CeO 2 nanorods > ZnO nanospheres (NSs) > CeO 2 nanocubes > TiO 2 NSs > CeO 2 NSs > Fe 3 O 4 NSs ~ Co 3 O 4 NSs ~ control experiment. The mechanism for the degradation of EP was confirmed by monitoring catalytic kinetics of the CeO 2 nanopolyhedra in the presence of EP, dimethyl paraoxon, 4-nitrophenyl phosphate, and parathion. The nanocomposites were simply fabricated by electrostatic self-assembly of the CeO 2 nanopolyhedra and poly(diallyldimethylammonium chloride)-capped gold nanoparticles (PDDA-AuNPs). The resultant nanocomposites still efficiently catalyzed NaBH 4 -mediated reduction of 4-nitrophenol to 4-aminophenol with a normalized rate constant of 6.68 ± 0.72 s -1  g -1 and a chemoselectivity of >99%. In confirmation of the robustness and applicability of the as-prepared nanocomposites, they were further used to catalyze the degradation of EP to 4-amionphenol in river water and seawater.
(Copyright © 2020 Elsevier Inc. All rights reserved.)
فهرسة مساهمة: Keywords: Cerium dioxide; Degradation; Ethyl paraoxon; Gold nanoparticles; Nanocomposites
المشرفين على المادة: 059QF0KO0R (Water)
30K4522N6T (Cerium)
619G5K328Y (ceric oxide)
7440-57-5 (Gold)
Q9CX8P80JW (Paraoxon)
تواريخ الأحداث: Date Created: 20200612 Date Completed: 20201120 Latest Revision: 20201120
رمز التحديث: 20231215
DOI: 10.1016/j.envres.2020.109653
PMID: 32526493
قاعدة البيانات: MEDLINE
الوصف
تدمد:1096-0953
DOI:10.1016/j.envres.2020.109653