Shape control mechanism of cuprous oxide nanoparticles in aqueous colloidal solutions

Bai, Yakui; Yang, Tonghai; Gu, Qing; Cheng, Guoan; Zheng, Ruiting

doi:10.1016/j.powtec.2012.02.008

Cited by 107 publications

(68 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The Cu 2 O nanoparticles were synthesised by the precipitation method of Bai et al [13]. This synthesis was chosen over other syntheses since it produces cubic crystallites of nanometer size.…”

Section: Sample Synthesismentioning

confidence: 99%

Novel photoactive inorganic polymer composites of inorganic polymers with copper(I) oxide nanoparticles

et al. 2015

View full text Add to dashboard Cite

Novel photoactive composites of cubic Cu 2 O nanoparticles with aluminosilicate geopolymers were prepared and their structure was shown by SEM/EDS and TEM. XRD, FTIR, 27 Al and 29 Si MAS NMR to consist of a well-reacted geopolymer matrix containing homogeneously dispersed Cu 2 O nanoparticles. Under dark conditions, both the geopolymer matrix and the composites were shown to adsorb a model organic compound (methylene blue, chosen for its colour stability at high pH) by a process which follows pseudo-first-order kinetics and can be described by Langmuir-type isotherms. At concentrations [20 wt%, the oxide decreases the adsorption rate by blocking the active adsorption sites of the geopolymer. Under UV radiation, the composites remove the methylene blue by a combination of adsorption and photodegradation, without deterioration of the geopolymer structure or the photoactive Cu 2 O component, as evidenced by 63 Cu NQR spectroscopy, suggesting that these geopolymer composites should function as useful new materials for the removal of organic pollutants from water or the atmosphere.

show abstract

Section: Sample Synthesismentioning

confidence: 99%

Novel photoactive inorganic polymer composites of inorganic polymers with copper(I) oxide nanoparticles

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Shape control mechanism of cuprous oxide nanoparticles was recently studied in aqueous solutions with the use of a polyvinylpyrrolidone surfactant [29]. Size and low-dimensional structures are governed by thermodynamic and kinetic parameters.…”

Section: Precipitation Of Oxide Nanoparticlesmentioning

confidence: 99%

“…The particle morphology is also sensitive to the stirring rate. A fast stirring rate strongly increases the probability of collisions between particles and can lead to the formation of nanospheres [29]. Here, the quick addition of the ascorbic acid solution into the cuprous hydroxide precipitate at a fast stirring rate allows the formation of spherical cuprous oxide nanospheres with the cuprite structure (Pn-3m space group) by a successive dissolution/reprecipitation mechanism (Figs.…”

Section: Precipitation Of Oxide Nanoparticlesmentioning

confidence: 99%

Room temperature inorganic polycondensation of oxide (Cu2O and ZnO) nanoparticles and thin films preparation by the dip-coating technique

et al. 2015

View full text Add to dashboard Cite

Oxide thin solid films were prepared by dip-coating into colloidal dispersions of oxide nanoparticles stabilized at room temperature without the use of chelating or complex organic dispersing agents. Crystalline oxide nanoparticles were obtained by inorganic polycondensation and characterized by X-ray diffraction and field emission gun scanning electron microscopy. Water and ethanol synthesis and solution stabilization of oxide nanoparticle method was optimized to prepare two different structural and compositional materials, namely Cu 2 O and ZnO. The influence of hydrodynamic parameters over the particle shape and size is discussed. Spherical and rod shape nanoparticles were formed for Cu 2 O and ZnO, respectively. Isoelectric point values of 7.5 and 8.2 were determined for cuprous and zinc oxides, respectively, after zeta potential measurements. A shear thinning and thixotropic behavior was observed in both colloidal sols after peptization at pH~6 with dilute nitric acid. Every colloidal dispersion stabilized in a low cost and environmentally friendly azeotrope solution composed of 96 vol.% of ethanol with water was used for the thin film preparation by the dip-coating technique. Optical properties of the light absorber cuprous oxide and transparent zinc oxide thin solid films were characterized by means of transmittance and reflectance measurements (300-1100 nm).

show abstract

“…3 (scans 2-4), the thermal decomposition products contain no precursors (I-IV). According to Bai et al [28], the reflections observed at angles 2θ = 36.3° and 42.2°5 That the intensity of the reflections from metallic copper increased with increasing heating time (Fig. 3, scan 3) and the peaks characteristic of Cu 2 O almost completely disappeared was probably caused by the reduction of the oxide with PEG.…”

Section: Resultsmentioning

confidence: 85%

Copper(II) alkyl- and benzylnitrosohy-droxylaminates as precursors for the synthesis of copper(i) oxide micro- and nanoparticles of various morphologies

et al. 2014

View full text Add to dashboard Cite

We describe the thermal decomposition of a number of copper(II) alkyl and benzylnitrosohy droxylaminates via thermostating in polyethylene glycol and 2 dodecyl 1H imidazole for various lengths of time. This process is shown to lead to the formation of copper(I) oxide nanoparticles, which have been char acterized by X ray diffraction and electron spectroscopy. The starting copper(II) nitrosohydroxylaminates have been characterized by thermogravimetry.

show abstract

Shape control mechanism of cuprous oxide nanoparticles in aqueous colloidal solutions

Cited by 107 publications

References 29 publications

Novel photoactive inorganic polymer composites of inorganic polymers with copper(I) oxide nanoparticles

Novel photoactive inorganic polymer composites of inorganic polymers with copper(I) oxide nanoparticles

Room temperature inorganic polycondensation of oxide (Cu2O and ZnO) nanoparticles and thin films preparation by the dip-coating technique

Copper(II) alkyl- and benzylnitrosohy-droxylaminates as precursors for the synthesis of copper(i) oxide micro- and nanoparticles of various morphologies

Contact Info

Product

Resources

About