Synthesis of Different Cu(OH)₂ and CuO (Nanowires, Rectangles, Seed-, Belt-, and Sheetlike) Nanostructures by Simple Wet Chemical Route

Abstract

We report the synthesis of different Cu(OH) 2 and CuO nanostructures (nanowires, rectangles, seedlike, beltlike, and sheetlike) in a solution phase with high yield at low cost by simple reduction of aqueous solution of copper nitrate (Cu(NO 3 ) 2 ) 0.2 M) with different alkaline solutions of sodium hydroxide (NaOH ) 0.1, 0.25, 0.50, 0.75, and 1.0 M). The morphology of the synthesized nanostructures is significantly influenced by the feeding concentration of alkaline NaOH solution. Cu(OH) 2 rectangles and nanowires can be readily obtained by the reduction of Cu(NO 3 ) 2 solution with different molar concentrations of NaOH solution and the synthesized nanomaterials get transformed into different nanostructures of CuO by subsequent heat treatment at 80 °C for half an hour. Well-defined rectangle-like structures of hydrated copper hydroxide Cu(OH) 2 • H 2 O and different CuO nanostructures, such as seedlike, beltlike, and sheetlike, were synthesized by thermal dehydration of corresponding different shaped and sized Cu(OH) 2 nanomaterials. The Raman spectra of different CuO nanomaterials obtained at different molar concentrations of NaOH (0.25, 0.50, 0.75, and 1 M) were recorded in the region 1050-1300 cm -1 . A tentative mechanism has been given for the formation and transformation of different nanostructures.

An improved sensitivity nonenzymatic glucose biosensor based on a Cu O modified electrode

“…The CuO and Cu 2 O nanoparticles were synthesized by a template-free wet chemical approach mentioned before (Singh et al, 2009;Wang et al, 2002) with some modifications. The details were shown in Supplementary material.…”

“…Therefore, it is reasonable to expect that processing CuO and Cu 2 O into nanostructured materials could enhance its performance in the catalytic activity towards the electro-oxidation of glucose. Various nanostructured cupric oxide and cuprous oxide with different sizes have been synthesized by hydrothermal synthesis in solution (Park et al, 2009;Singh et al, 2009;Wang et al, 2002;Wen et al, 2003;Zhang et al, 2006), self-assembly 0956-5663/$ -see front matter © 2010 Elsevier B.V. All rights reserved. doi:10.1016/j.bios.2010.07.007 on substrates (Xiang et al, 2010;Zhuang et al, 2008) and by heating copper substrates at elevated temperature (Jiang et al, 2002;Venkatachalam et al, 2009).…”

Efficient catalytic effect of CuO nanostructures on the degradation of organic dyes

“…Due to the versatile properties and diverse applications, various kinds of CuO nanostructures and microstructures e.g. nanorods, nanosheets, and nanodentrites as well as honeycomb-like, urchin-like and dumbbell-like structures [9][10][11][12] have been synthesized using a variety of fabrication techniques including the chemical bath method, sol-gel method, gas phase oxidation, micro-emulsion, and many other techniques [13][14][15][16].…”

Synthesis of CuInS2 by Sulfide Ion‐Exchange of CuIn(OH)5 Precursors

“…42-0638 and 76-1463). 13,14 After anion exchange by Na 2 S, CuInS 2 were produced in an amorphous phase. The annealed CuInS 2 under H 2 /Ar atmosphere had a chalcopyrite phase.…”