Abstract
A Layered Lanthanide Hydroxide (LLH) material based on europium (LEuH, Eu8(OH)20Cl4.6H2O) was intercalated with 2,6-naphtalenedicarboxylate (NDC) yielding a material presenting the bright red luminescence characteristic of Eu3 +, both by direct excitation of europium and energy transfer from NDC. The material behaves as a sensor towards anions which display the ability to exchange with NDC. The sensor was tested with several anions (phosphate, sulphate, pyrophosphate, acetate, and tetraborate anions) and the changes in NDC (λem = 380 nm) and europium (λem = 615 nm) emission intensities upon excitation of NDC (λex = 357 nm), were studied. Phosphate was found to have the highest degree of intercalation and displayed a strong increase (400% fold) on the fluorescence intensity of NDC. The presence of phosphate was further confirmed with Inductively Coupled Plasma-Atomic Emission Spectrometer (ICP-AES). Taking advantage of LEuH selectivity towards phosphate, its applicability in phosphorus remediation was studied presenting high sequestration capacity followed by controlled release of phosphate in three consecutive cycles and improved stability of the LEuH host material. These results highlight the significant potential of LLHs as new scavenging agents for inorganic phosphate.
| Original language | English |
|---|---|
| Pages (from-to) | 216-222 |
| Number of pages | 7 |
| Journal | Applied Clay Science |
| Volume | 146 |
| DOIs | |
| Publication status | Published - 15 Sep 2017 |
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Keywords
- Layered lanthanide hydroxide
- Layered rare earth hydroxide
- Phosphate adsorption
- Phosphate sensing
- Phosphorus remediation
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Layered europium hydroxide system for phosphorous sensing and remediation. / Pereira, Cláudia C. L.; Lima, João Carlos; Moro, Artur J.; Monteiro, Bernardo.
In: Applied Clay Science, Vol. 146, 15.09.2017, p. 216-222.Research output: Contribution to journal › Article
TY - JOUR
T1 - Layered europium hydroxide system for phosphorous sensing and remediation
AU - Pereira, Cláudia C. L.
AU - Lima, João Carlos
AU - Moro, Artur J.
AU - Monteiro, Bernardo
N1 - Work partially supported by FCT (Portugal) under the project UID/Multi/04349/2013 and grants to Claudia C. L. Pereira (SFRH/BPD/108959/2015), Artur J. Moro (SFRH/BDP/69210/2010) and Bernardo Monteiro (SFRH/BPD/47087/2008).
PY - 2017/9/15
Y1 - 2017/9/15
N2 - A Layered Lanthanide Hydroxide (LLH) material based on europium (LEuH, Eu8(OH)20Cl4.6H2O) was intercalated with 2,6-naphtalenedicarboxylate (NDC) yielding a material presenting the bright red luminescence characteristic of Eu3 +, both by direct excitation of europium and energy transfer from NDC. The material behaves as a sensor towards anions which display the ability to exchange with NDC. The sensor was tested with several anions (phosphate, sulphate, pyrophosphate, acetate, and tetraborate anions) and the changes in NDC (λem = 380 nm) and europium (λem = 615 nm) emission intensities upon excitation of NDC (λex = 357 nm), were studied. Phosphate was found to have the highest degree of intercalation and displayed a strong increase (400% fold) on the fluorescence intensity of NDC. The presence of phosphate was further confirmed with Inductively Coupled Plasma-Atomic Emission Spectrometer (ICP-AES). Taking advantage of LEuH selectivity towards phosphate, its applicability in phosphorus remediation was studied presenting high sequestration capacity followed by controlled release of phosphate in three consecutive cycles and improved stability of the LEuH host material. These results highlight the significant potential of LLHs as new scavenging agents for inorganic phosphate.
AB - A Layered Lanthanide Hydroxide (LLH) material based on europium (LEuH, Eu8(OH)20Cl4.6H2O) was intercalated with 2,6-naphtalenedicarboxylate (NDC) yielding a material presenting the bright red luminescence characteristic of Eu3 +, both by direct excitation of europium and energy transfer from NDC. The material behaves as a sensor towards anions which display the ability to exchange with NDC. The sensor was tested with several anions (phosphate, sulphate, pyrophosphate, acetate, and tetraborate anions) and the changes in NDC (λem = 380 nm) and europium (λem = 615 nm) emission intensities upon excitation of NDC (λex = 357 nm), were studied. Phosphate was found to have the highest degree of intercalation and displayed a strong increase (400% fold) on the fluorescence intensity of NDC. The presence of phosphate was further confirmed with Inductively Coupled Plasma-Atomic Emission Spectrometer (ICP-AES). Taking advantage of LEuH selectivity towards phosphate, its applicability in phosphorus remediation was studied presenting high sequestration capacity followed by controlled release of phosphate in three consecutive cycles and improved stability of the LEuH host material. These results highlight the significant potential of LLHs as new scavenging agents for inorganic phosphate.
KW - Layered lanthanide hydroxide
KW - Layered rare earth hydroxide
KW - Phosphate adsorption
KW - Phosphate sensing
KW - Phosphorus remediation
UR - http://www.scopus.com/inward/record.url?scp=85020682535&partnerID=8YFLogxK
U2 - 10.1016/j.clay.2017.06.002
DO - 10.1016/j.clay.2017.06.002
M3 - Article
VL - 146
SP - 216
EP - 222
JO - Applied Clay Science
JF - Applied Clay Science
SN - 0169-1317
ER -