Mesoporous Titanium Phosphate Molecular Sieves with Ion-Exchange Capacity

Abstract

Novel open framework molecular sieves, titanium(IV) phosphates named, i.e., TCM-7 and -8 (Toyota Composite Materials, numbers 7 and 8), with new mesoporous cationic framework topologies obtained by using both cationic and anionic surfactants are reported. The (31)P MAS NMR, UV-visible absorption, and XANES data suggest the tetrahedral state of P and Ti, and stabilization of the tetrahedral state of Ti in TCM-7/8 is due to the incorporation of phosphorus (at Ti/P = 1:1) vis-à-vis the most stable octahedral state of Ti in the pure mesoporous TiO(2). Mesoporous TCM-7 and -8 show anion exchange capacity due to the framework phosphonium cation and cation exchange capacity due to defective P-OH groups. The high catalytic activity in the liquid-phase partial oxidation of cyclohexene with a dilute H(2)O(2) oxidant supports the tetrahedral coordination of Ti in these materials.

Ionothermal Synthesis, Crystal Structure, and Magnetic Study of Co2PO4OH Isostructural with Caminite

“…11 In addition, cobalt phosphates are of interest because of their magnetic properties. 12 Since the first amino-templated tetrahedral open framework cobalt phosphate [C 2 H 10 N 2 ]-[CoPO 4 ] was reported in 1994, much attention has been paid to this class of compounds. 13 Recently, our group successfully utilized ionic liquids (ILs) in the synthesis of metal, metal fluoride, and metal oxide nanomaterials for energy-related applications, for example, in catalysis or photonic materials.…”

“…For determination of the dc magnetic susceptibility, a field of 0.1 T was used for the temperature-dependent measurement, and fields up to 7 T were used for the isothermal magnetizations at temperatures of 2, 5, 10, 20, and 30 K. The driving field in the ac measurements was 2 Oe, with frequencies ranging from 1 to 1000 Hz. 4 (OH) (0 ≤ y ≤ 2/3). 21 The competing phase, Co 2 PO 4 F (2), 22 crystallizes isostructurally with triplite (Mn 2 PO 4 F) 23 with the space group C2/c.…”

Phosphate Modification of Nano Titania and Its Effect on the Photodegradation of EDTA

“…The absence of these vibration bands in the spectrum of P-TiO 2 suggested the removal of organic material after heating. However, an absorption band around 1090 cm -1 (characteristic frequency of PO 4 3− ) 28 appeared on the shoulder of −Ti−O−Ti vibration band in the spectrum of P-TiO 2 , which revealed that phosphorus might have been incorporated on the surface of nano titania. The result of EDX analysis also supported this finding.…”

Effect of mechanical treatment on the powder properties of zinc phosphate white pigments

“…[4,5]. Phosphate materials are well known to have a high affinity for living organisms and are therefore expected to be useful as white pigments in cosmetics.…”