TY - JOUR
T1 - Tripodal ligand-stabilized layered double hydroxide nanoparticles with highly exchangeable CO3
2-
AU - Kuroda, Yoshiyuki
AU - Miyamoto, Yumi
AU - Hibino, Mitsuhiro
AU - Yamaguchi, Kazuya
AU - Mizuno, Noritaka
PY - 2013/6/11
Y1 - 2013/6/11
N2 - Layered double hydroxide nanoparticles (LDHNPs) with exceptionally small particle sizes are synthesized using a tripodal ligand of tris(hydroxymethyl) aminomethane (THAM). For example, a LDHNP with the average size of 9.7 nm (denoted as LDH(10 nm), containing CO3
2- in the interlayer), can be synthesized using a 2.0 M THAM solution. The 13C CP/MAS NMR and FTIR analyses show that THAM is ligated to the layer as an alkoxide species. The average particle size of LDH synthesized using l-lysine (buffering base) instead of THAM is larger (47.9 nm) than that of LDH(10 nm). Therefore, the size reduction is possibly explained by the specific interaction of THAM with the layer via its multiple coordination. In addition, it is confirmed by the 13C CP/MAS NMR analysis that LDH(10 nm) possesses CO3
2- species weakly interacting with the layers. LDHNPs, in particular, as-synthesized LDH(10 nm) (denoted as LDH(10 nm)-as, containing CO3
2- and Cl- in the interlayer), possesses the extremely high anion exchange abilities, and almost all anions in LDH(10 nm)-as are potentially exchangeable with NO3
-, even under ambient (CO2-existing) conditions. Furthermore, LDH(10 nm)-as can act as an efficient reusable scavenger for harmful oxyanions and remove arsenic, selenium, and boron from their dilute aqueous solutions under ambient conditions.
AB - Layered double hydroxide nanoparticles (LDHNPs) with exceptionally small particle sizes are synthesized using a tripodal ligand of tris(hydroxymethyl) aminomethane (THAM). For example, a LDHNP with the average size of 9.7 nm (denoted as LDH(10 nm), containing CO3
2- in the interlayer), can be synthesized using a 2.0 M THAM solution. The 13C CP/MAS NMR and FTIR analyses show that THAM is ligated to the layer as an alkoxide species. The average particle size of LDH synthesized using l-lysine (buffering base) instead of THAM is larger (47.9 nm) than that of LDH(10 nm). Therefore, the size reduction is possibly explained by the specific interaction of THAM with the layer via its multiple coordination. In addition, it is confirmed by the 13C CP/MAS NMR analysis that LDH(10 nm) possesses CO3
2- species weakly interacting with the layers. LDHNPs, in particular, as-synthesized LDH(10 nm) (denoted as LDH(10 nm)-as, containing CO3
2- and Cl- in the interlayer), possesses the extremely high anion exchange abilities, and almost all anions in LDH(10 nm)-as are potentially exchangeable with NO3
-, even under ambient (CO2-existing) conditions. Furthermore, LDH(10 nm)-as can act as an efficient reusable scavenger for harmful oxyanions and remove arsenic, selenium, and boron from their dilute aqueous solutions under ambient conditions.
KW - anion exchange
KW - layered double hydroxide nanoparticles
KW - removal of harmful oxyanions
KW - tripodal ligand
UR - http://www.scopus.com/inward/record.url?scp=84879023644&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84879023644&partnerID=8YFLogxK
U2 - 10.1021/cm400846k
DO - 10.1021/cm400846k
M3 - Article
AN - SCOPUS:84879023644
VL - 25
SP - 2291
EP - 2296
JO - Chemistry of Materials
JF - Chemistry of Materials
SN - 0897-4756
IS - 11
ER -