Highly selective and efficient heavy metal capture with polysulfide intercalated layered double hydroxides

2014 ◽  
Vol 2 (26) ◽  
pp. 10280-10289 ◽  
Author(s):  
Shulan Ma ◽  
Qingmei Chen ◽  
Hao Li ◽  
Pengli Wang ◽  
Saiful M. Islam ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Layered Double Hydroxides ◽  
High Selectivity ◽  
Layered Composites ◽  
Metal Capture ◽  
Double Hydroxides ◽  
Selectivity And Capacity

Intercalation of polysulfides into LDHs forms layered composites that can separate Hg2+, Ag+ and Cu2+ from mixed ions with high selectivity and capacity.

Selective hydrogenation of 2-pentenal using highly dispersed Pt catalysts supported on ZnSnAl mixed metal oxides derived from layered double hydroxides

2020 ◽  
Vol 10 (4) ◽  
pp. 1106-1116
Author(s):  
Huanjun Wang ◽  
Xiaocheng Lan ◽  
Shiqing Wang ◽  
Babar Ali ◽  
Tiefeng Wang
Keyword(s):  
Metal Oxides ◽  
Layered Double Hydroxides ◽  
Selective Hydrogenation ◽  
High Selectivity ◽  
Mixed Metal Oxides ◽  
Pt Catalysts ◽  
Mixed Metal ◽  
Highly Dispersed ◽  
Double Hydroxides

Highly dispersed Pt catalysts supported on ZnSnAl mixed metal oxides showed high selectivity for 2-pentenol in selective hydrogenation of 2-pentenal.

scholarly journals Layered double hydroxides as amendment for remediation of heavy metal ions in water and soil

2021 ◽  
Vol 51 (5) ◽  
pp. 493-508
Author(s):  
Fangqi Mao ◽  
Peipei Hao ◽  
Xianggui Kong ◽  
Xiaodong Lei ◽  
Xue Duan
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Layered Double Hydroxides ◽  
Heavy Metal Ions ◽  
Double Hydroxides

Silver nanoclusters functionalized by chromotropic acid and layered double hydroxides for the turn-on detection of melamine

2016 ◽  
Vol 4 (25) ◽  
pp. 6104-6109 ◽  
Author(s):  
He Ren ◽  
Mingzhe Li ◽  
Yanyan Fu ◽  
Lan Jin
Keyword(s):  
Layered Double Hydroxides ◽  
High Selectivity ◽  
Ultrathin Film ◽  
Chromotropic Acid ◽  
Silver Nanoclusters ◽  
Practical Utility ◽  
Turn On ◽  
Double Hydroxides

A fluorescent ultrathin film (CTA-AgNCs/LDH) is developed for the determination of melamine with high selectivity, low detection and practical utility.

A novel luminescence probe based on layered double hydroxides loaded with quantum dots for simultaneous detection of heavy metal ions in water

2017 ◽  
Vol 5 (20) ◽  
pp. 5024-5030 ◽  
Author(s):  
Jieyuan Liu ◽  
Guocheng Lv ◽  
Wenlong Gu ◽  
Zhaohui Li ◽  
Aiwei Tang ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Quantum Dots ◽  
Layered Double Hydroxides ◽  
Luminescence Intensity ◽  
Heavy Metal Ions ◽  
Simultaneous Detection ◽  
Real Water Samples ◽  
Remarkable Improvement ◽  
Double Hydroxides

A remarkable improvement in luminescence intensity was achieved by immobilizing quantum dots on the surface of layered double hydroxides, for the detection of heavy metals in real water samples.

scholarly journals Reactivity and Heavy Metal Removal Capacity of Calcium Alginate Beads Loaded with Ca–Al Layered Double Hydroxides

2019 ◽  
Vol 3 (1) ◽  
pp. 22 ◽  
Author(s):  
Andres Borgiallo ◽  
Ricardo Rojas
Keyword(s):  
Heavy Metal ◽  
Layered Double Hydroxides ◽  
Calcium Alginate ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Alginate Beads ◽  
Buffering Capacity ◽  
Uptake Capacity ◽  
Removal Capacity ◽  
Double Hydroxides

Layered double hydroxides (LDHs) present multiple applications due to their versatility and reactivity. Thus, Ca–Al LDHs with Friedel’s salt structure (HC) have been proposed as heavy metal scavengers due to their buffering capacity at basic pHs. Nevertheless, the control of the reactivity of LDHs such as HC is necessary to optimize their applications. Here, the reactivity of an HC prepared by a coprecipitation method was modified by its inclusion in calcium alginate (CaAlg) beads prepared by ionic gelation. The obtained beads (CaAlg/HC) showed good dispersion of the HC particles in the alginate matrix and were used to test the acid base reactivity and heavy metal uptake capacity compared with pure CaAlg beads and HC powder separately. The pH buffering capacity of CaAlg beads was enriched by the inclusion of HC that, in turn, was modulated in its reactivity. Thus, the HC dissolution times changed from mere seconds for the powder to tens of minutes when enclosed in the beads in a kinetic profile determined by the diffusive step. On the other hand, Cu2+ uptake capacity of CaAlg/HC beads combined the Cu(OH)2 precipitation capacity of HC with the complexation capacity of alginate, reaching good affinity and capacity for the obtained beads. Nevertheless, the precipitation of the hydroxide was produced outside the bead, which would induce the addition of an additional separation step to produce an acceptable Cu2+ elimination.

Synergistic coagulation of GO and secondary adsorption of heavy metal ions on Ca/Al layered double hydroxides

2017 ◽  
Vol 229 ◽  
pp. 827-836 ◽  
Author(s):  
Wen Yao ◽  
Jian Wang ◽  
Pengyi Wang ◽  
Xiangxue Wang ◽  
Shujun Yu ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Layered Double Hydroxides ◽  
Heavy Metal Ions ◽  
Double Hydroxides
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