Unraveling the Environmental Applications of Nanoporous Ultrananocrystalline Diamond Films

被引:1
|
作者
Vernasqui, Lais G. [1 ,2 ]
Segundo, Inalmar D. Barbosa [2 ,3 ]
Martinez-Huitle, Carlos A. [3 ]
Ferreira, Neidenei G. [1 ]
Rodrigo, Manuel A. [2 ]
机构
[1] Natl Inst Res Space INPE, Ave Astronautas,1758 Jd da Granja, BR-12227010 Sao Jose Dos Campos, SP, Brazil
[2] Univ Castilla La Mancha, Dept Chem Engn, Campus Univ S-N, Ciudad Real 13071, Spain
[3] Univ Fed Rio Grande do Norte, Inst Chem, Renewable Energies & Environm Sustainabil Res Grp, Campus Univ,Ave Salgado Filho 3000, BR-59078970 Lagoa Nova, RN, Brazil
基金
巴西圣保罗研究基金会;
关键词
methomyl electrooxidation; Boron-doped diamond; ultrananocrystalline diamond; wastewater treatment; redox coupes; WASTE-WATER; ELECTROCHEMICAL DEGRADATION; ELECTRODE; METHOMYL; FABRICATION; GENERATION; EFFICIENCY; MECHANISM; ARRAY;
D O I
10.3390/catal14120872
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
In this work, a nanoporous ultrananocrystalline diamond film (B-UNCDWS/TDNT/Ti) was obtained and compared with a commercial electrode in the degradation of methomyl, a recalcitrant pesticide. The morphological and structural differences between the materials were highlighted by SEM and XRD analysis: while the commercial electrode presented a regular and planar surface with microcrystalline grains, supported by XRD features, the B-UNCDWS/TDNT/Ti electrode presented a porous morphology with DRX features indicating a high film renucleation rate. Those differences affected the electrooxidation of methomyl; B-UNCDWS/TDNT/Ti was responsible for faster and more economic degradation of the pollutant, achieving a methomyl degradation of 78% (against 35% by the commercial electrode). The highly porous surface of UNCDWS/TDNT/Ti provides an electrochemical area threefold greater than the one found in the commercial electrode, justifying the better efficiency in the formation of persulfate, which can be singled out as the main mechanism in methomyl degradation.
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页数:14
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