Treatment of Cr<sup>VI</sup>‐Containing Mg(OH)<sub>2</sub> Nanowaste

Liu, Weizhen; Huang, Feng; Liao, Yiqun; Zhang, Jing; Ren, Guoqiang; Zhuang, Zanyong; Zhen, Jinsheng; Lin, Zhang; Wang, Chen

doi:10.1002/anie.200800172

Cited by 212 publications

(59 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…12−15 For instance, we previously revealed a fast growth and phase transformation process from the aggregates of 20 nm Mg(OH) 2 to 2 μm Na 2 Mg(CO 3 ) 2 crystals. 14 Zhan et al reported the direct formation of largecrystal CaCO 3 (1 μm) via nanocrystal (20 nm) aggregation. 12 Oriented assembly of small Fe 3 O 4 nanoparticles into hollow single-crystal microspheres 13 and the growth of large-sized Prussian Blue crystals via assembly of nanocrystals were also observed.…”

Section: ■ Introductionmentioning

confidence: 99%

“…14,16−18 Unfortunately, phase transformation frequently accompanies the crystal growth. 14,16,17 This complicacy leads to the difficulty in studying the growth mechanism and hence a lack of good understanding of this special growth process. To date, the majority of research is restricted to the investigation of the growth process itself rather than to get comprehensive insights into the kinetics and the underlying mechanism in particular.…”

Section: ■ Introductionmentioning

confidence: 99%

“…To date, the majority of research is restricted to the investigation of the growth process itself rather than to get comprehensive insights into the kinetics and the underlying mechanism in particular. 14,18 Generally, an understanding of the factors that affect the kinetics is fundamental to tune the crystal growth and thus to achieve new types of nanostructures and new material properties. 7,9 Tailoring the size of tin oxide (SnO 2 ) crystal is of great interest for its wide applications in nanotechnology.…”

Section: ■ Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Aggregation-Induced Fast Crystal Growth of SnO₂ Nanocrystals

et al. 2012

Self Cite

View full text Add to dashboard Cite

In this paper, we report an ultrafast growth of SnO(2) nanocrystals directly from ~4 to ~350 nm in a hydrothermal process (250 °C, time >180 h). The crystal growth system is characterized by "either small or large" particle size; that is, only two differently sized SnO(2) particles, either several nanometers or ~350 nm, coexist. During the fast growth process, SnO(2) nanoparticles assembled to form densely aggregated aggregates that can quickly transform to big (bulk-like) crystals. The kinetic analysis, for the first time, point outs that the fast growth reaction (from nanocrystal aggregates to bulk-like crystals) follows a first-order reaction law with a very large kinetic pre-exponent factor (1.53 × 10(27) h(-1)), which is in line with our proposed aggregation-induced fast crystal growth mechanism. Small-angle X-ray scattering (SAXS) study of the aggregates supports that the onset of the fast growth is closely related to an increase in the aggregation degree of the aggregates. Moreover, disintegrating the aggregation state via introduction of other particles (Al(2)O(3)) into the system prohibited the fast growth. The finding in this work provides new threads for syntheses of novel nanomaterials that may possess properties not readily obtained via conventional crystal growth routes.

show abstract

Section: ■ Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Aggregation-Induced Fast Crystal Growth of SnO₂ Nanocrystals

et al. 2012

Self Cite

View full text Add to dashboard Cite

show abstract

“…[8][9][10][11][12] In recent years, the usage of metal oxides or metal hydroxide in removing heavy metals has attracted much interest due to their low cost, environmentally benign nature, and excellent adsorption properties. [13][14][15][16][17] In particular, easy and low-cost synthesis of nanostructured magnesium oxide has a certain merit in treatment application because all the chemicals used are inexpensive and environmentally benign. 2 Due to its non-toxic property and potential of high sorption capacity, nano-particles of MgO were applied as an adsorbent not only for anions (i.e., arsenate and phosphate), 15 18 but also for dye, heavy metals, and organic matter.…”

Section: Introductionmentioning

confidence: 99%

Nano-Structured Magnesium Oxide Coated Iron Ore: Its Application to the Remediation of Wastewater Containing Lead

Nagarajah

Jang

Saravanan

et al. 2015

j nanosci nanotechnol

View full text Add to dashboard Cite

Magnetically separable nano-structured magnesium oxide coated iron ore (IO(MgO)) was prepared using environmentally benign chemicals, such as iron ore (IO), magnesium(II) nitrate hexahydrate [Mg(NO3)2 x 6H2O] and urea; via an easy and fast preparation method. The lO(MgO) was characterized using X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDS) and alternating gradient magnetometer (AGM) analyses. The isotherm and kinetic studies indicated that lO(MgO) has a comparably higher Langmuir constant (K(L), 1.69 L mg(-1)) and maximum sorption capacity (33.9 mg g(-1)) for lead (Pb) than other inorganic media. Based on MgO amount, the removal capacity of Pb by IO(MgO) was 2,724 mg Pb (g MgO)(-1), which was higher than that (1,980 mg g(-1)) for flowerlike magnesium oxide nanostructures reported by Cao et al. The kinetics, FE-SEM, elemental mapping and XRD results revealed that the substitution followed by precipitation was identified as the mechanism of Pb removal and plumbophyllite (Pb2Si4O10 x H2O) was the precipitated phase of Pb. A leaching test revealed that IOMgO) had negligible concentrations of leached Fe at pH 4-9. Since the base material, IO, is cheap and easily available, lO(MgO) could be produced in massive amounts and used for remediation of wastewater containing heavy metals, applying simple and fast magnetic separation.

show abstract

“…Compared with traditional adsorbents, nanosized materials have attracted our interest in heavy metals removal or other contaminants removal for their large speci¯c surface area. 16,17 However, their applications have been hindered by some vital defects, such as agglomeration, di±culty in collection and separation. Thus, a novel adsorbent with high adsorption capacity as well as practicability is needed to solve these problems.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Petaloid TPEE@AlOOH Nanofibers with Cr (VI)-Removal Capacity

Wang

Jia

2015

NANO

View full text Add to dashboard Cite

Hexavalent chromium (Cr (VI)) is a highly toxic pollutant which is harmful to marine organisms as well as humanity. Removing Cr (VI) from water is a hot-spot in environmental remediation. In this work, a novel kind of composite nano¯bers membrane (thermal plastic elastomer ester (TPEE)@AlOOH) was¯rst proposed by a simple method, based on a hybrid strategy composed of electrospinning and hydrothermal method. The obtained nano¯brous membrane was turned out to be a petaloid structure, which can enlarge the speci¯c surface area of electrospun¯bers. Furthermore, the Cr (VI) removal experiments suggested that the obtained nano¯brous membrane showed a high and fast e±ciency, a stable recyclable property for the Cr (VI) removal. Therefore, such a novel nano¯brous membrane can be potentially widely used in Cr (VI) removal.

show abstract

Treatment of Cr^VI‐Containing Mg(OH)₂ Nanowaste

Cited by 212 publications

References 17 publications

Aggregation-Induced Fast Crystal Growth of SnO₂ Nanocrystals

Aggregation-Induced Fast Crystal Growth of SnO₂ Nanocrystals

Nano-Structured Magnesium Oxide Coated Iron Ore: Its Application to the Remediation of Wastewater Containing Lead

Preparation of Petaloid TPEE@AlOOH Nanofibers with Cr (VI)-Removal Capacity

Contact Info

Product

Resources

About

Treatment of CrVI‐Containing Mg(OH)2 Nanowaste

Cited by 212 publications

References 17 publications

Aggregation-Induced Fast Crystal Growth of SnO2 Nanocrystals

Aggregation-Induced Fast Crystal Growth of SnO2 Nanocrystals

Nano-Structured Magnesium Oxide Coated Iron Ore: Its Application to the Remediation of Wastewater Containing Lead

Preparation of Petaloid TPEE@AlOOH Nanofibers with Cr (VI)-Removal Capacity

Contact Info

Product

Resources

About

Treatment of Cr^VI‐Containing Mg(OH)₂ Nanowaste

Aggregation-Induced Fast Crystal Growth of SnO₂ Nanocrystals

Aggregation-Induced Fast Crystal Growth of SnO₂ Nanocrystals