EDTA-assisted hydrothermal synthesis, characterization, and luminescent properties of YPO 4 · n H 2 O:Eu 3+ ( n = 0, 0.8) microflakes and microbundles

CO2 gas sensing response of YPO4 nanobelts produced by a colloidal method

“…The resulting materials were nanoparticles of irregular shape, nanofibers, microflakes, microbundles, hexagonal microprisms and ellipsoid nanoparticles, among others [7][8][9][10][11][12][13][14]. Of particular interest for this work, Lai et al using the hydrothermal method produced nanospheres, nanorods and microprisms, by adding citric acid, oxalate and EDTA (ethylenediaminetetraacetic acid), respectively [15].…”

Formation and aspect ratio control of rhabdophane-type yttrium orthophosphate hexagonal prism particles synthesized by a citrate-assisted hydrothermal process

“…This n value is somewhat lower than the typical value for rhab-YPO 4 , n = 0.8. 32 However, another report has indicated a 5.4% weight loss ( n = 0.59) for rhab-YPO 4 :Eu 3+ , 6 so that the present value would be in a reasonable range. As the crystalline waters exist as zeolitic ones, n could vary depending on the synthesis methods or conditions.…”

“…Yttrium orthophosphate, YPO 4 , has been used as a host material for rare-earth-doped phosphors, YPO 4 :Ln 3+ , where Ln 3+ denotes rare-earth ions such as Eu 3+ , Tb 3+ , etc. 1–22 In addition to the ordinal photoluminescence (PL), up-conversion PL has been achieved by co-doping a pair of two or three appropriate Ln 3+ ions, such as Yb 3+ /Tb 3+ , Yb 3+ /Er 3+ , or Nd 3+ /Yb 3+ /Er 3+ pairs. 23–25 The PL properties also enable the YPO 4 :Ln 3+ particles to be applied in detection probes for arsenic, 26 temperature, 27 or pressure.…”

“…21 Using appropriate additives seems more effective to obtain rhab-YPO 4 in a hydrothermal system. The additives that have been reported are Na 2 CO 3 , 14,17 CTAB, 5,10,18 EDTA, 6,9 organic acids, 3,5,9,15,16,22,31 etc. Such additives were also effective in a solvothermal system using an EtOH/water mixture 2,11 or an ethylene glycol medium.…”