Toward enhanced visible-light photocatalytic dye degradation and reusability of La 3+ substituted ZnFe 2 O 4 nanostructures.

Autor: Nguyen LTT; Faculty of Chemistry, Thai Nguyen University of Education, Thai Nguyen, 240000, Viet Nam., Nguyen HTT; Faculty of Fundamental Sciences, Thai Nguyen University of Technology, Thai Nguyen, 24000, Viet Nam., Nguyen LTH; Faculty of Chemistry, Thai Nguyen University of Education, Thai Nguyen, 240000, Viet Nam., Duong ATT; Faculty of Chemistry, Thai Nguyen University of Education, Thai Nguyen, 240000, Viet Nam., Nguyen HQ; Faculty of Chemistry, Thai Nguyen University of Education, Thai Nguyen, 240000, Viet Nam., Bui ND; Faculty of Chemistry, Thai Nguyen University of Education, Thai Nguyen, 240000, Viet Nam., Ngo VTM; Faculty of Chemistry, Thai Nguyen University of Education, Thai Nguyen, 240000, Viet Nam., Nguyen DTC; Institute of Applied Technology and Sustainable Development, Nguyen Tat Thanh University, 298-300A Nguyen Tat Thanh, District 4, Ho Chi Minh City, 755414, Viet Nam; Faculty of Environmental and Food Engineering, Nguyen Tat Thanh University, 298-300A Nguyen Tat Thanh, District 4, Ho Chi Minh City, 755414, Viet Nam., Tran TV; Institute of Applied Technology and Sustainable Development, Nguyen Tat Thanh University, 298-300A Nguyen Tat Thanh, District 4, Ho Chi Minh City, 755414, Viet Nam; Faculty of Environmental and Food Engineering, Nguyen Tat Thanh University, 298-300A Nguyen Tat Thanh, District 4, Ho Chi Minh City, 755414, Viet Nam. Electronic address: tranvt@ntt.edu.vn.
Jazyk: angličtina
Zdroj: Environmental research [Environ Res] 2022 Nov; Vol. 214 (Pt 4), pp. 114130. Date of Electronic Publication: 2022 Aug 20.
DOI: 10.1016/j.envres.2022.114130
Abstrakt: The present work focused on the synthesis of novel ZnLa x Fe 2-x O 4 catalysts (x = 0, 0.01, 0.03, 0.05) and their utilization for the photocatalytic degradation of Rhodamine B dye. Structurally, the band gap energy of the catalysts tended to decrease (1.94-1.70 eV) with increasing the amount of La 3+ dopant. ZnLa 0.05 Fe 1.95 O 4 had an average particle size (40 nm), high surface area (41.07 m 2  g -1 ) and large pore volume (0.186 cm 3  g -1 ). Moreover, the effect of doping ratio, reaction time, H 2 O 2 concentration, catalyst loading on the treatment performance of La 3+ substituted ZnFe 2 O 4 nanocomposites was investigated. ZnLa 0.05 Fe 1.95 O 4 /H 2 O 2 system exhibited the highest degradation efficiency of 99.5% and nonlinear pseudo first-order kinetic reaction rate (14.8 × 10 -3  min -1 ) in the presence of visible light irradiation. The key role of reactive oxygen species involving • O 2 - and • OH radicals was well explained through the scavenger study. A plausible mechanism of the degradation of Rhodamine B dye was also proposed. Due to two advantageous points including high recyclability (up to 4 cycles) and stability, La 3+ substituted ZnFe 2 O 4 nanocomposites can be an effective and competitive catalyst for the visible light-driven photodegradation of toxic dyes in the real wastewaters.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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