Microstructural and optical properties of CuS nanoparticles prepared by sol–gel route

Riyaz, Sana; Parveen, Azra; Azam, Ameer

doi:10.1016/j.pisc.2016.06.041

Cited by 126 publications

(37 citation statements)

References 8 publications

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“…The results confirmed the presence of copper sulfide nanoparticles suspended with an approximate monomer size of less than 50 nm, though nanoaggregate formation occurred over several days, reaching a functional size of~700 nm. The nanoparticles produced in this study were remarkably crystalline and homogenous compared with those of other synthetic, wet chemical routes [9][10][11].…”

Section: Discussionmentioning

confidence: 75%

“…Biogenic production of metallic sulfide nanoparticles has been reported by using a range of different biological [8] and chemical approaches, including aqueous solutions [9], aqueous gels [10], and wet chemical routes using complexing agents [11]. The synthesis of copper sulfide nanoparticles has attracted increasing attention due to their important technological properties as advanced nanomaterials including novel applications in the biomedical area, e.g., as photothermal agents for cancer treatment [12].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Copper Sulfide Nanoparticles Using Biogenic H2S Produced by a Low-pH Sulfidogenic Bioreactor

et al. 2018

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Abstract:The application of acidophilic sulfate-reducing bacteria (SRB) for the treatment of acidic mine water has been recently developed to integrate mine water remediation and selective biomineralization. The use of biogenic hydrogen sulfide (H 2 S) produced from the dissimilatory reduction of sulfate to fabricate valuable products such as metallic sulfide nanoparticles has potential applications in green chemistry. Here we report on the operation of a low-pH sulfidogenic bioreactor, inoculated with an anaerobic sediment obtained from an acid river in northern Chile, to recover copper via the production of copper sulfide nanoparticles using biogenic H 2 S. The laboratory-scale system was operated as a continuous flow mode for up to 100 days and the bioreactor pH was maintained by the automatic addition of a pH 2.2 influent liquor to compensate for protons consumed by biosulfidogenesis. The "clean" copper sulfide nanoparticles, produced in a two-step process using bacterially generated sulfide, were examined using transmission electron microscopy, dynamic light scattering, energy dispersive (X-ray) spectroscopy and UV-Vis spectroscopy. The results demonstrated a uniform nanoparticle size distribution with an average diameter of less than 50 nm. Overall, we demonstrated the production of biogenic H 2 S using a system designed for the treatment of acid mine water that holds potential for large-scale abiotic synthesis of copper sulfide nanoparticles.

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Section: Discussionmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Synthesis of Copper Sulfide Nanoparticles Using Biogenic H2S Produced by a Low-pH Sulfidogenic Bioreactor

et al. 2018

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“…However, prepared CuS NPs in solid form have been reported using different sulfide sources viz. sodium sulfide (Huang et al 2017;Riyaz et al 2016;Ayodhya et al 2016;Shamsipur et al 2013;Castillon-Barraza et al 2011;Ding et al 2010), sodium thiosulfate (Nafees et al 2015;Kundu and Pradhan 2013; Percent radial growth inhibition ¼ Radial growth of fungal colony in control À Radial growth of fungal colony in treatment Radial growth of fungal colony in control Â 100 With the increase in level of capping the size reduces and in turn, the k max value get relatively blue shifted (Rani 2016), which is the most probable explanation for the altered optical properties of nanoparticles when capped.…”

Section: Resultsmentioning

confidence: 99%

Antifungal evaluation studies of copper sulfide nano-aquaformulations and its impact on seed quality of rice (Oryzae sativa)

2017

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Surface capped copper sulfide nano-aquaformulations were prepared by in situ combination of copper ions with sulfide ions using sonochemical method, followed by microwave irradiations, in the presence of capping agents. Prepared nano-aquaformulations were characterized for particle size, morphology and optical properties. The in vitro antifungal evaluations studies indicated multifold efficacy against Alternaria alternata, Drechslera oryzae and Curvularia lunata in comparison to standard used. The in vivo seed treatment on discoloured paddy seeds showed the optimum results on application @ 7lg/ml for 2 h in case of citrate capped copper sulfide nanoformulation (NCuS 3 ). Significant reduction in seed rot and seedling blight was observed with favourable effect on germination and growth parameters at this concentration.

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“…These three bands described above are also visible in the TiO 2 /CuS_15 spectrum. Furthermore, oscillation localized between 500-700 cm −1 are typical for Cu-S stretching and are only clearly visible in the CuS spectra [55,56]. In Figure 6d was shown the effect of TiO 2 modification using Bi 2 S 3 .…”

Section: Photoluminescence Propertiesmentioning

confidence: 94%

The Effect of AgInS2, SnS, CuS2, Bi2S3 Quantum Dots on the Surface Properties and Photocatalytic Activity of QDs-Sensitized TiO2 Composite

et al. 2020

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The effect of type (AgInS 2 , SnS, CuS 2 , Bi 2 S 3 ) and amount (5, 10, 15 wt%) of quantum dots (QDs) on the surface properties and photocatalytic activity of QDs-sensitized TiO 2 composite, was investigated. AgInS 2 , SnS, CuS 2 , Bi 2 S 3 QDs were obtained by hot-injection, sonochemical, microwave, and hot-injection method, respectively. To characterize of as-prepared samples high-resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), UV-Vis spectroscopy and photoluminescence (PL) emission spectroscopy were applied. The size of AgInS 2 , SnS, CuS 2 , Bi 2 S 3 QDs were 12; 2-6; 2-3, and 1-2 nm, respectively. The QDs and QDs-sensitized TiO 2 composites obtained have been tested in toluene degradation under LEDs light irradiation (λ max = 415 nm and λ max = 375 nm). For pristine QDs the efficiency of toluene degradation increased in the order of AgInS 2 < Bi 2 S 3 < CuS < SnS under 375 nm and AgInS 2 < CuS < Bi 2 S 3 < SnS under 415 nm. In the presence of TiO 2 /SnS QDs_15% composite, 91% of toluene was degraded after 1 h of irradiation, and this efficiency was about 12 higher than that for pristine QDs under 375 nm. Generally, building the TiO 2 /AgInS 2 and TiO 2 /SnS exhibited higher photoactivity under 375 nm than the pristine TiO 2 and QDs which suggests a synergistic effect between QDs and TiO 2 matrix. Catalysts 2020, 10, 403 2 of 18 application of metal sulfides (M x S y ) for wide band semiconductors modification, because of their high charge separation efficiency and narrow band gaps, which possibly enable light harvesting at longer wavelengths [9]. Liu et al. studied the efficiency of AgInS 2 /TiO 2 heterostructures in 1,2-dichlorobenzene (o-DCB) degradation under visible light [10]. They observed that AgInS 2 /TiO 2 composites could expand the visible-light response range and greatly decreased the recombination of photogenerated electron−hole pairs in the composites. The degradation of o-DCB for the most active sample reaches about 50% after 8h of irradiation. Jang et al. prepared Ag-SnS-TiO 2 nanocomposite for methylene blue and rhodamine B degradation under simulated sunlight [11].The photoactivity of the produced photocatalysts was about 2-3 times higher than that of P25. Compared with bare TiO 2 the CuS/TiO 2 [12], CdS/TiO 2 [13-15], SnS/TiO 2 [16], Ag 2 S/TiO 2 [17,18], CuInS 2 /TiO 2 [19-21], Bi 2 S 3 /TiO 2 [22][23][24] nanocomposites present a significant improvement on photocatalytic reactions due to the decreasing recombination of electron-hole pairs and the broadened light absorption spectra. However, the metal sulfides commonly employed for TiO 2 modification have been used in nanoparticle sizes and not in quantum dots sizes. Further, it has been shown that the size of metal sulfides (MS) particles can have an impact on its physicochemical and optical properties. Recently, the literature data demonstrated that the decrease in particle size lowers the recombination of the electron-hole pair within the semiconductor particle. Quantum...

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Microstructural and optical properties of CuS nanoparticles prepared by sol–gel route

Cited by 126 publications

References 8 publications

Synthesis of Copper Sulfide Nanoparticles Using Biogenic H2S Produced by a Low-pH Sulfidogenic Bioreactor

Synthesis of Copper Sulfide Nanoparticles Using Biogenic H2S Produced by a Low-pH Sulfidogenic Bioreactor

Antifungal evaluation studies of copper sulfide nano-aquaformulations and its impact on seed quality of rice (Oryzae sativa)

The Effect of AgInS2, SnS, CuS2, Bi2S3 Quantum Dots on the Surface Properties and Photocatalytic Activity of QDs-Sensitized TiO2 Composite

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