Rapid removal of selenate in a zero-valent iron/Fe3O4/Fe2+ synergetic system

Tang, Cilai; Huang, Yingping; Zhang, Zengqiang; Chen, Jianjun; Zeng, Hui; Huang, Yong

doi:10.1016/j.apcatb.2015.11.045

Cited by 77 publications

(21 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Magnetic metal-ceramic nanocomposites, consisting of a dispersion of transition metal (TM = Fe, Co, Ni) nanoparticles into a ceramic matrix, are being actively studied in view of a variety of applications associated with their porous structure, ranging from environmental issues (e.g., water remediation [45][46][47], treatment of pollutants [48][49][50][51][52]) to catalysis [53][54][55][56] and biomedicine [57,58]).…”

Section: Ceramic Nanocompositesmentioning

confidence: 99%

Magnetic Properties of Nanocomposites

et al. 2019

View full text Add to dashboard Cite

The magnetic properties of various families of nanocomposite materials containing nanoparticles of transition metals or transition-metal compounds are reviewed here. The investigated magnetic nanocomposites include materials produced either by dissolving a ferrofluid containing pre-formed nanoparticles of desired composition and size in a fluid resin submitted to subsequent curing treatment, or by generating the nanoparticles during the very synthesis of the embedding matrix. Two typical examples of these production methods are polymer nanocomposites and ceramic nanocomposites. The resulting magnetic properties turn out to be markedly different in these two classes of nanomaterials. The control of nanoparticle size, distribution, and aggregation degree is easier in polymer nanocomposites, where the interparticle interactions can either be minimized or exploited to create magnetic mesostructures characterized by anisotropic magnetic properties; the ensuing applications of polymer nanocomposites as sensors and in devices for Information and Communication Technologies (ICT) are highlighted. On the other hand, ceramic nanocomposites obtained from transition-metal loaded zeolite precursors exhibit a remarkably complex magnetic behavior originating from the simultaneous presence of zerovalent transition-metal nanoparticles and transition-metal ions dissolved in the matrix; the applications of these nanocomposites in biomedicine and for pollutant remediation are briefly discussed.

show abstract

Section: Ceramic Nanocompositesmentioning

confidence: 99%

Magnetic Properties of Nanocomposites

et al. 2019

View full text Add to dashboard Cite

show abstract

“…alternative for the capture of Se anions from water. Adsorption technology is superior to other commonly used remediation technologies including precipitation-filtration [8][9][10][11][12][13], anion exchange [14][15][16][17], and membrane filtration [18,19], in water treatment, in terms of low-cost operation, simplicity in design, and ease of operation.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Micro-nanostructured δ-Bi2O3 with surface oxygen vacancies as superior adsorbents for SeOx2− ions

Liu

Chen

Lei³

et al. 2018

Journal of Hazardous Materials

View full text Add to dashboard Cite

Removal of the toxic selenium compounds, selenite (SeO) and selenate (SeO), from contaminated water is imperative for environmental protection in both developing and industrialized countries. Providing high selectivity adsorbents to the target ions is a big challenge. Here we report that micro sphere-like δ-BiO (MS-δ-BiO) with surface oxygen vacancy defects can capture hypertoxic SeO anions from aqueous solutions with superior capacity and fast uptake rate. High capture selectivity to SeO anions is observed, since the O atoms of SeO anions fill the oxygen vacancies on the (111) facet of δ-BiO forming a stable complex structure. This mechanism is distinctly different from other known mechanisms for anion removal, and implies that we may utilize surface defects as highly efficient and selective sites to capture specific toxic species. Thus, we present a new route here to design superior adsorbents for toxic ions.

show abstract

“…In the last decade, the scientific interest towards magnetic nanostructured / nanocomposite materials has steadily increased owing to their functional properties associated with widespread applications ranging from electronics [1], magneto-optics and photocatalysis [2][3][4][5] to supercapacitors [6,7], hyperthermia [8], drug delivery [9,10], water remediation [11], energy harvesting [12]. Oxides of transition metals / rare earths have received particular attention because of the concurrence of magnetic effects and semiconducting-like properties [3,12,13] Magnetic metal-ceramic nanocomposites, consisting of a dispersion of Fe 0 , Co 0 , or Ni 0 nanoparticles into a prevailingly amorphous silica and alumina ceramic matrix, are an important sub-class of nanomaterials whose fields of application are typically associated with their porous structure, which makes them particularly suitable for use in environmental protection [14][15][16][17][18][19][20][21][22], catalysis [23][24][25][26][27][28] and biomedicine [29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Magnetic clustering of Ni2+ ions in metal-ceramic nanocomposites obtained from Ni-exchanged zeolite precursors

Barrera

Tiberto

Esposito

et al. 2018

Ceramics International

View full text Add to dashboard Cite

Metal-ceramic nanocomposites containing nominal 15% wt. Ni were produced by a smart, scalable process involving a suitable thermal treatment of Ni-exchanged zeolite precursors, and were investigated by dc magnetic techniques between 2 and 300 K. Two main magnetic phases were detected in all studied materials: globular magnetic nanoparticles with average diameters in the 10-20 nm range, and Ni2+ ions embedded in the host ceramic matrix. The blocking temperature of Ni0 nanoparticles is well above room temperature. The magnetic signal from nanoparticles dominates at high temperature; however, a clear paramagnetic signal from Ni2+ ions emerges when the temperature is decreased. The magnetic moment per Ni ion is in agreement with typical values found in Ni-containing zeolites. Magnetic susceptibility and FC/ZFC curves point to the existence of a weak interaction among Ni2+ ions (Néel temperature TN < 15 K) which results in the formation of ferrimagnetic-like clusters below about 30 K. In each cluster, the individual magnetic moments respond in a collective way with blocking temperatures less than 5 K.

show abstract

Rapid removal of selenate in a zero-valent iron/Fe3O4/Fe2+ synergetic system

Cited by 77 publications

References 40 publications

Magnetic Properties of Nanocomposites

Magnetic Properties of Nanocomposites

Micro-nanostructured δ-Bi2O3 with surface oxygen vacancies as superior adsorbents for SeOx2− ions

Magnetic clustering of Ni2+ ions in metal-ceramic nanocomposites obtained from Ni-exchanged zeolite precursors

Contact Info

Product

Resources

About