Selective extraction and determination of toxic lead based on doped metal oxide nanofiber

Marwani, Hadi M.; Lodhi, Mazhar Ullah; Khan, Sher Bahadar; Asiri, Abdullah M.

doi:10.1016/j.jtice.2015.01.018

Cited by 10 publications

(4 citation statements)

References 59 publications

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“…It illustrated that the qualitative peaks of M-O and O-M-O vibration stretching occurred at 520 and 595 cm −1 , respectively. Furthermore, spectrum elaborated sharp peaks corresponding to 1344 cm −1 can be attributed to the adsorption of CO 2 or CO 3 2− , which is in line with the literature [ 16 – 18 ]. There are also peaks at 1640 and 3432 cm −1 , corresponding to O-H bending and O-H stretching vibrations, which confirmed the presence of moisture adsorbed from the atmosphere by the as-prepared nanomaterial.…”

Section: Resultssupporting

confidence: 90%

Visible light functioning photocatalyst based on Al2O3 doped Mn3O4 nanomaterial for the degradation of organic toxin

Asif¹,

Khan²,

Asiri³

2015

Nanoscale Res Lett

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Al2O3 doped Mn3O4 nanomaterial was synthesized by low-temperature stirring method and applied as a catalyst for the degradation of organic pollutants under solar light for prospective environmental applications. The morphological and physiochemical structure of the synthesized solar photocatalyst was investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy-dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS). FESEM showed a mixture of nanowires and aggregated nanoparticles. This Al2O3 doped Mn3O4 nanomaterial exhibited high solar photocatalytic degradation in a short time when applied to brilliant cresyl blue (BCB). Thus, the synthesized nanoparticles can be used as an efficient solar photocatalyst for the degradation of BCB.

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Section: Resultssupporting

confidence: 90%

Visible light functioning photocatalyst based on Al2O3 doped Mn3O4 nanomaterial for the degradation of organic toxin

Asif¹,

Khan²,

Asiri³

2015

Nanoscale Res Lett

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“…The final product shows a 3D nanocone composed of nanoparticles, and the mean length and cross-section (center) of the nanocones were approximately 1.42 mm and 0.53 mm, respectively. Similarly, Marwani et al [27] prepared a CdO coordinated Fe2O3 composite of aggregated nanofiber with an average width size of 70 nm using cadmium and ferric salts as metal resources and NaOH as precipitant, respectively. The selective research indicated that Pb(II) showed the highest distribution coefficient (Kd) value of 1.21 × 10 5 mL•g −1 among the coexisting cations, including Cd(II), Co(II), Cu(II), Cr(III), Cr(VI), Fe(III), Ni(II), and Zn(II).…”

Section: Coprecipitation Methodsmentioning

confidence: 99%

Selective Adsorption of Hazardous Substances from Wastewater by Hierarchical Oxide Composites: A Review

Tu,

Cai

2024

Toxics

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Large volumes of wastewater containing toxic contaminants (e.g., heavy metal ions, organic dyes, etc.) are produced from industrial processes including electroplating, mining, petroleum exploitation, metal smelting, etc., and proper treatment prior to their discharge is mandatory in order to alleviate the impacts on aquatic ecosystems. Adsorption is one of the most effective and practical methods for removing toxic substances from wastewater due to its simplicity, flexibility, and economics. Recently, hierarchical oxide composites with diverse morphologies at the micro/nanometer scale, and the combination advantages of oxides and composite components have been received wide concern in the field of adsorption due to their multi-level structures, easy functionalization characteristic resulting in their large transport passages, high surface areas, full exposure of active sites, and good stability. This review summarizes the recent progress on their typical preparation methods, mainly including the hydrothermal/solvothermal method, coprecipitation method, template method, polymerization method, etc., in the field of selective adsorption and competitive adsorption of hazardous substances from wastewater. Their formation processes and different selective adsorption mechanisms, mainly including molecular/ion imprinting technology, surface charge effect, hard-soft acid-base theory, synergistic effect, and special functionalization, were critically reviewed. The key to hierarchical oxide composites research in the future is the development of facile, repeatable, efficient, and scale preparation methods and their dynamic adsorption with excellent cyclic regeneration adsorption performance instead of static adsorption for actual wastewater. This review is beneficial to broaden a new horizon for rational design and preparation of hierarchical oxide materials with selective adsorption of hazardous substances for wastewater treatment.

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“…Recently, intensive studies have been performed to utilize nanosized materials in the development of new methods to efficiently detect and remove heavy metals with high selectivity. Nanostructured materials exhibit unparalleled aptitudes as adsorbents for the extraction and separation of metal ions [18][19][20][21][22]. In addition, nanomaterials have particular shapes, are small in size, have extraordinary surface activity and also a high active surface-to-volume ratio, which generate and enhance different properties [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Removal of hexavalent chromium from aqueous solutions using Ni–SiO$$_{2}$$ nanomaterials

et al. 2019

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This study describes an effective method developed for the removal of hexavalent chromium, Cr(VI), from an aqueous environment. In this study, the Ni-SiO 2 nanomaterial was synthesized by the sol-gel method and then characterized by field emission scanning electron microscopy, X-ray diffraction and energy dispersive X-ray spectroscopy. The prepared nanomaterial was then employed as an adsorbent with significant properties of high surface area and uptake capacity. Adsorption conditions of Cr(VI) onto the Ni-SiO 2 nanomaterial were optimized by altering different parameters (pH, initial Cr(VI) concentration and different periods of time). An amount of 100.75 mg g −1 was estimated as the maximum uptake capacity of the Ni-SiO 2 nanomaterial at pH 4.0. The experimental data of Cr(VI) adsorption onto the Ni-SiO 2 nanomaterial were fitted well to the Langmuir isotherm and pseudo second-order kinetic models. Moreover, the adsorption of Cr(VI) onto the Ni-SiO 2 nanomaterial was not influenced even in the presence of different coexisting ions. Finally, the recommended methodology was applied on several environmental water samples.

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Selective extraction and determination of toxic lead based on doped metal oxide nanofiber

Cited by 10 publications

References 59 publications

Visible light functioning photocatalyst based on Al2O3 doped Mn3O4 nanomaterial for the degradation of organic toxin

Visible light functioning photocatalyst based on Al2O3 doped Mn3O4 nanomaterial for the degradation of organic toxin

Selective Adsorption of Hazardous Substances from Wastewater by Hierarchical Oxide Composites: A Review

Removal of hexavalent chromium from aqueous solutions using Ni–SiO$$_{2}$$ nanomaterials

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