Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 18, Pages 15652-15664Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b00625
Keywords
catalyst; pollutant; pesticides; fenitrothion; Gd2MoO6; electrocatalyst; photocatalyst
Funding
- Ministry of Science and Technology, Taiwan, ROC [MOST 106-2113-M-027-003, MOST 106-2811-M-027-004]
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Three-dimensional (3D) nanostructured materials have received enormous attention in energy and environment remediation applications. Herein, we developed a novel 3D flower-like gadolinium molybdate (Gd2MoO6; GdM) and used as a bifunctional catalyst for the electrochemical detection and photocatalytic degradation of organophosphate pesticide fenitrothion (FNT). The flower-like GdM catalyst was prepared via a simple sol-gel technique with the assistance of urea and ethylene glycol. The properties of GdM were confirmed by various spectroscopic and analytical techniques. The GdM catalyst played a significant role in electrochemical reduction of FNT and results in a very low detection limit (5 nM), wide linear ranges (0.02-123; 173-1823 mu M), and good sensitivity (1.36 mu A mu M-1 cm(-2)). Interestingly, the GdM electrocatalyst had good recoveries to FNT in soil and water sample analysis. In addition to trace level detection, the flower-like GdM was used as the photocatalyst which portrayed an excellent photocatalytic degradation behavior to eliminate the FNT in the aqueous system. The GdM photocatalyst could degrade above 99% of FNT under UV light irradiation with good stability even after five cycles.
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