Premium
Non‐Hydrothermal Synthesis of Cu(I)‐Microleaves from Cu(II)‐Nanorods
Author(s) -
Konch Tukhar Jyoti,
Sharma Mukesh,
Satyanarayana Lanka,
Hazarika Anil,
Karunakar Galla V.,
Bania Kusum. K.
Publication year - 2016
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201601271
Subject(s) - catalysis , methylene blue , nanorod , nuclear chemistry , copper , hydrothermal circulation , materials science , electron paramagnetic resonance , yield (engineering) , bet theory , bimetallic strip , chemistry , chemical engineering , organic chemistry , nanotechnology , physics , nuclear magnetic resonance , photocatalysis , engineering , metallurgy
Simultaneous transformation of structural morphology, material dimension and oxidation state of Cu (II)‐nanorod was achieved with 3‐(Triethoxysilyl)propylamine, (APTS) and 4‐nitrobenzaldehyde (4‐NB) under non‐hydrothermal condition. Morphology of the modified Cu(I) material was found to resemble with the leaf of colocasea. Conversion of a Cu(II) based nono‐material to a Cu(I)‐based micro‐material was confirmed from EPR, MAS‐ NMR and cyclic voltametric (CV) study. BET‐surface area, Raman signal intensity and thermal stability of the Cu(I)‐microleaf was greatly enhanced due to presence of Cu‐O−Si linkage. Both the Cu(II) and Cu(I) material were found to be effective catalyst systems for nitro‐aldol reaction as well as catalytic oxidation of methylene blue (MB) dye in presence of H 2 O 2 . High %yield (>90 %) of nitro‐aldol product was obtained with both the catalyst. Catalytic reaction under microwave irradiation was found to bring substantial decrease in reaction time. Cu (II)‐material was however not recyclable because of its soft nature. While the Cu(I)‐microleaf was recycled upto four consecutive cycles. These materials were found to degrade methylene blue dye within 20 min in presence of H 2 O 2 but in absence of light. Dark phase catalytic oxidation of MB was monitored both via UV‐vis and cyclic voltametric study.