Improving cesium removal to clean-up the contaminated water using modified conjugate material

Awual, Md. Rabiul; Yaita, Tsuyoshi; Kobayashi, Tooru; Shiwaku, Hideaki; Suzuki, Shinichi

doi:10.1016/j.jece.2020.103684

Cited by 202 publications

(23 citation statements)

References 146 publications

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“…in layers of nanostructured ZnO can function as ETL in solar cells that include organic [6], dye sensitized [7], and perovskite solar cells [8], respectively. In addition, when obtained as a mesoporous structure, it could have a possible industrial application for conjugated materials [9,10]. Several deposition techniques are used to grow ZnO films, such as thermal evaporation [11], spray pyrolysis [12], sputtering [13], laser ablation [14], and sol-gel [15] among others.…”

Section: Introductionmentioning

confidence: 99%

Morphological, Structural, and Optical Bandgap Characterization of Extracted ZnO Nanoparticles from Commercial Paste

Nabil

Perez-Quintana

Acosta

et al. 2021

Advances in Materials Science and Engineering

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ZnO nanoparticles (NPs) were extracted from a commercial paste in both colloidal and precipitate forms. The Zetasizer analysis performed on the colloid showed ZnO NPs ranging from ∼30 nm to ∼100 nm. Thin films of ZnO were deposited on glass substrates by spin-coating technique from a mixture of the extracted colloid and precipitate. The scanning electron microscope (SEM) images showed uniformly arranged, mesoporous, and nanostructured ZnO particles of different shapes, with an estimated film thickness of 0.67 μm. Analysis by energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction analysis (XRD) confirmed the presence of ZnO in the films, with no impurities or remnants of other materials. The XRD analysis showed a polycrystalline nature of the films and identified a pure phase formation of the hexagonal wurtzite structure. The average crystallite size calculated from the diffraction peaks is ∼43.25 nm. The calculated crystal tensile strain is 1.954 × 10−3, which increases the crystal volume by 0.728% compared with the crystal volume of standard ZnO. The calculated crystal parameters are a = b = 3.258 Å and c = 5.217 Å. The calculated dislocation density (d) and bond length Zn–O (L) are 5.35 × 10−4 nm−2 and 2.695 Å, respectively. Ultraviolet-visible absorption spectra showed an optical band gap of ∼3.80 eV.

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Section: Introductionmentioning

confidence: 99%

Morphological, Structural, and Optical Bandgap Characterization of Extracted ZnO Nanoparticles from Commercial Paste

Nabil

Perez-Quintana

Acosta

et al. 2021

Advances in Materials Science and Engineering

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“…Interestingly, the coexisting K + , Ca 2+ , Mg 2+ , Zn 2+ and Ni 2+ do not greatly affect the Tl + adsorption and no great decrease is observed even though the concentration of present cations is as high as 10 mM. Awual et al also found that the present K + did not greatly prevent the adsorption of Cs + (similar to Tl + in chemical properties) by crown ether based conjugate material 53 . It is noteworthy that the coexisting Cd 2+ inhibits Tl + adsorption.…”

Section: Resultsmentioning

confidence: 94%

Highly efficient removal of thallium(I) by facilely fabricated amorphous titanium dioxide from water and wastewater

Zhang

Luo

Han-lin

et al. 2022

Sci Rep

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In this study, amorphous hydrous titanium dioxide was synthesized by a facile precipitation method at room temperature, aiming to effectively remove thallium(I) from water. The titanium dioxide prepared using ammonia as precipitant (TiO2I) is more effective for thallium(I) uptake than the one synthesized with sodium hydroxide (TiO2II). The TiO2 obtained particles are amorphous, aggregates of many nanoparticles and irregular in shape. The thallium(I) uptake increases with the rise of solution pH value. Under neutral pH conditions, the maximal thallium(I) adsorption capacities of TiO2I and TiO2II are 302.6 and 230.3 mg/g, respectively, outperforming most of the reported adsorbents. The amorphous TiO2 has high selectivity towards thallium(I) in the presence of multiple cations such as K+, Ca2+, Mg2+, Zn2+ and Ni2+. Moreover, the TiO2I is efficient in removing thallium(I) from real river water and mining wastewater. Additionally, the spent TiO2I can be regenerated using hydrochloric acid solution and reused. The Tl(I) adsorption is achieved via replacing the H+ in hydroxyl group on the surface of TiO2 and forming inner-sphere surface complexes. Owing to its high efficiency, facile synthesis and environmental friendliness, the TiO2I has the potential to be used as an alternative adsorbent to remove Tl(I) from water.

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“…Langmuir isotherm and Freundlich isotherm are two common models for the study of adsorption mechanism [21,22]. In this work, the fitting curves and the related isotherm parameters are shown in Figure 7 and Table 3, respectively.…”

Section: Resultsmentioning

confidence: 99%

Green synthesis of fly ash‐based zeolite Y by mixed alkali fusion method

Shi

Chang

2021

Micro & Nano Letters

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A solvent-free process was used to synthesize high-purity zeolite Y from fly ash. Different from the traditional two-step method, fly ash was activated efficiently by mixed alkali of NaOH and Na 2 CO 3 at 750 • C for 2 h. For prepared zeolite Y, the composition, phase structure, morphology, specific surface areas and ammonium adsorption were evaluated comprehensively. The results show that a single phase zeolite Y with octahedral structure and an average diameter of 2.5 µm is obtained. The Brunauer-Emmett-Teller surface area is as high as 503.34 m 2 /g. Ammonium adsorption isotherm model on obtained zeolite Y was more consistent with the Langmuir model (R 2 > 0.99). And the maximum adsorption capacity is 18.6 mg/g. It can be concluded that the study provides an economic process to utilize fly ash for the synthesis of zeolite Y, which is an excellent adsorbent to remove ammonium. In addition, this study provides an eco-friendly approach to synthesize lowcost zeolite Y from solid waste, which is of excellent adsorption for ammonium removal.

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Improving cesium removal to clean-up the contaminated water using modified conjugate material

Cited by 202 publications

References 146 publications

Morphological, Structural, and Optical Bandgap Characterization of Extracted ZnO Nanoparticles from Commercial Paste

Morphological, Structural, and Optical Bandgap Characterization of Extracted ZnO Nanoparticles from Commercial Paste

Highly efficient removal of thallium(I) by facilely fabricated amorphous titanium dioxide from water and wastewater

Green synthesis of fly ash‐based zeolite Y by mixed alkali fusion method

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