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Li, Bo; Liya, Shen; Liu, Xiaozhen; Zhang, Shuihe; Zhang, Yumei; Wang, Tianmin; Sasaki, Yasushi; Ishii, Kuniyoshi; Kashiwaya, Yoshiaki; Takahashi, Hitomi; Shibayama, Tamaki

doi:10.1023/a:1010985130019

Cited by 21 publications

(15 citation statements)

References 14 publications

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“…For the as prepared samples, the IR spectra behave nearly the same trend independent on the method of preparation. The IR charts show the appearance of an absorption bands at 3898-3209 cm -1 due to OH stretch and another peak at ~1632 cm -1 which is attributed to OH bending mode [26]. The absorption band characterizing the general phosphates band is pointed at 1430 cm -1 [27].…”

Section: Resultsmentioning

confidence: 99%

Synthesis and microstructure studies of nano-sized cerium phosphates

et al. 2010

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KEYWORDSCerium phosphate, CePO4, nanoparticles with hexagonal or monoclinic phase was synthesized by the reaction between Ce(SO4)2.4H2O and two different phosphate sources, H3PO4 and Na2HPO4. The obtained gel was dried and calcined at different temperatures (200, 400, and 800 о C). The effects of the precursor materials and the calcination temperatures on the produced phases were studied. Both X-ray diffraction (XRD) and infrared spectroscopy (IR) were used to follow the changes in the phase structure for the produced samples. The thermal behaviour of the as prepared samples was studied by using differential scanning calorimetric (DSC) and thermogravimetric analysis (TGA). The morphology, crystallinity and particle size of the produced samples as prepared and calcinated were characterized by transmission electron microscope (TEM). The analysis of TEM results indicated that CePO4 was prepared in nano-sized particles.Cerium phosphate Synthesis X-ray diffraction IR DSC/TGA TEM

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Section: Resultsmentioning

confidence: 99%

Synthesis and microstructure studies of nano-sized cerium phosphates

et al. 2010

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“…The prominent peak at 1040 cm -1 is due to the phosphate P-O stretching and those around 616 and 540 cm -1 correspond to the O›P-O bending and O-P-O bending modes, respectively. [20] The small peaks appearing around 2900 cm -1 are present in all the spectra and correspond to C-H stretching, which is probably because of organic contamination of the KBr used for preparing the disks. The peaks between 2500-2300 cm -1 are related to the presence of CO 2 .…”

Section: Full Papermentioning

confidence: 95%

A Facile Sol–Gel Strategy for the Synthesis of Rod‐Shaped Nanocrystalline High‐Surface‐Area Lanthanum Phosphate Powders and Nanocoatings

Komban¹,

Palantavida²,

Seidel³

et al. 2007

Adv Funct Materials

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Synthesis of rod‐shaped nanocrystalline lanthanum phosphate with an average length of 40 nm even after calcination at 400 °C has been realized through a room‐temperature aqueous sol–gel process. The sol is characterized by particle‐size, zeta‐potential, and viscosity measurements. Gelation of the sol is induced by ammonia. The lanthanum phosphate phase‐formation process is followed by thermal, Fourier‐transform IR, and X‐ray diffraction analysis. Transmission electron microscopy shows that the sol and gel particles have a rod‐shaped morphology and comparable particle sizes. Using the Scherrer equation a crystallite size of 11 nm is obtained for the gel powder calcined at 400 °C and Brunauer–Emmett–Teller (BET) nitrogen‐adsorption analysis showed a high specific surface area of 100 m2 g–1. Ammonia temperature‐programmed desorption measurements show that the density of Lewis acid sites is four times higher than ever reported in the case of lanthanum phosphates. The catalytic activity of the above sample is demonstrated by using it as a Lewis‐acid catalyst in an acetal‐formation reaction with a very good yield of 85 %. The sol is used to develop nanocoatings on a glass surface and the morphology of the coatings is investigated using atomic force microscopy and scanning electron microscopy. The microstructure of the coating confirmed the rod‐shaped nature of the sol particles. The coating was uniform with a thickness of about 55 nm.

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“…Cerium phosphate was prepared by hydrolysis of alkoxides and precipitation from salts [21,22]. Rare earth oxides and salts were reacted with phosphoric acid to obtain phosphates of lanthanum and cerium [23,24].…”

Section: Introductionmentioning

confidence: 99%