Copper Nanoparticles-Decorated Carbon Nanoflakes as a Catalyst for Nitroaromatic Reduction

被引:0
|
作者
Pandey, Ashutosh [1 ]
Twinkle, Sumit Kumar [2 ]
Sonkar, Sumit Kumar [3 ]
Dalal, Chumki [1 ]
机构
[1] Natl Inst Technol Delhi, Dept Appl Sci, Delhi 110036, India
[2] Malaviya Natl Inst Technol, Dept Chem, Jaipur 302017, Rajasthan, India
[3] Malaviya Natl Inst Technol, Dept Chem, Jaipur 302017, Rajasthan, India
关键词
copper nanoparticle; carbonnanoflakes; reduction; nitroaromatic; nitrophenol; aminophenol; METAL NANOPARTICLES; SILVER NANOPARTICLES; SELECTIVE REDUCTION; FACILE SYNTHESIS; 4-NITROPHENOL; NITROPHENOLS; NANOCOMPOSITE; COMPOSITES; DESIGN; GOLD;
D O I
10.1021/acsanm.4c05839
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Herein, we have developed highly active copper nanoparticles (CuNPs)-decorated carbon nanoflakes (CNFs) as a catalyst for the efficient reduction of nitroaromatic compounds, including para-nitrophenol (PNP), 2,4-dinitrophenol (DNP), and 2,4,6-trinitrophenol (TNP), to their respective amines at room temperature in the presence of sodium borohydride (NaBH4) in water. It is observed that the percentage of reduction of PNP is similar to 100%, and more interestingly, the catalyst reduces even DNP and TNP with an excellent conversion yield of similar to 95 and similar to 94%, respectively, within 15 min. The reduction reaction of nitroaromatic compounds follows pseudo-first-order kinetics with rate constants of 0.2962, 0.19893, and 0.20866 min-1 for PNP, DNP, and TNP, respectively. UV-vis absorption and FT-IR spectra confirm the conversion of nitroaromatic derivatives to their corresponding amine derivatives. Finally, we also established the plausible reaction mechanism for the reduction process by carrying out various control experiments. In brief, the reduction of nitrophenol occurs via the adsorption of activated hydrogen and nitrophenolate ions followed by reduction through electron transfer and by taking active H from the surface of Cu-CNFs.
引用
收藏
页码:26238 / 26247
页数:10
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