Fibrous Cerium (IV) Acid Phosphates Host of Weak and Strong Lewis Bases

Romano, Ricardo; Alves, Oswaldo Luiz

doi:10.1007/s10847-004-7732-z

Cited by 11 publications

(8 citation statements)

References 21 publications

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“…The peaks near 2900 cm –1 can be assigned to the symmetric and asymmetric stretching vibrations of methyl groups . The protonation of the amine group is represented by the absorption peak near 1500 cm –1 and can also be attributed to the bending vibration of –CH 2 and –NH 3 + . Since no absorption bands could be observed around 1500 cm –1 for the original α‐TiP, bands appearing in this region for samples B to F were clear evidence for alkyldiamine cations existed in the products.…”

Section: Resultsmentioning

confidence: 98%

Embedding Alkyldiamine into Layered α‐Titanium Phosphate via Direct‐Ion Exchange and its Application in Eu^III Removal from Water

Peng

Wang

et al. 2020

Zeitschrift anorg allge chemie

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Diamine-pillared α-titanium phosphate (α-TiP) was prepared via direct ion exchange method. Moreover, 1,3-propanediamine, as the pillaring agent, was used to investigate the effect of pH, content and temperature on the interlayer distance of α-TiP. The structure and properties of the samples were characterized by X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FT-IR), Field Emission Scanning Electron Microscopy (SEM), and Differential Thermal Analysis (TG). The results show that the interlayer distance of α-TiP was enlarged from 7.6 Å to 16.18 Å as the carbon chain of the intercalating diamine increased from (NH 2 (CH 2 ) n NH 2 ) (n = 2 to 7). The layer 399 space structure consists of monomolecular alkyl chains with an average tilt angle of 75.6°. The uptake values for these five alkyldiamine cations were 3.780, 3.261, 2.443, 2.175, and 1.954 mmol, per gram of TiP, respectively. Also, we found that the direct ion exchange method is more effective in a weak acidic environment. The variation of interlayer distance was a consecutive process, and unaffected by temperature. The 1,3-propanediamine intercalation product (α-TiPPda) showed excellent performance towards Eu III adsorption in water with removal efficiencies Ն 99 %. Journal of Inorganic and General ChemistryZeitschrift für anorganische und allgemeine Chemie ARTICLE

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Section: Resultsmentioning

confidence: 98%

Embedding Alkyldiamine into Layered α‐Titanium Phosphate via Direct‐Ion Exchange and its Application in Eu^III Removal from Water

Peng

Wang

et al. 2020

Zeitschrift anorg allge chemie

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“…The reason is that ,the composition, the structure and the degree of crystallinity of their precipitates results from reaction of solutions containing a Ce(IV) salt is mixed with a solution of phosphoric acid of [(PO4)/Ce(iv) ratio], strongly dependent on the experimental conditions such as rate and order of mixing of the solutions, stirring, temperature and digestion time, this also implemented on fibrous cerium phosphate [1,12]. To date most of the work on fibrous cerium phosphate was carried out on its ion exchange [13], intercalation [14] and electrical conductance properties [15].…”

Section: Introductionmentioning

confidence: 99%

γ-Zirconium Titanium-Phosphates – Fibrous Cerium Phosphate / Polyaniline, Polyindole, Polycarbazole and Polyimidazole Nanocomposite Membranes

Shakshooki¹,

El-Akari²,

Kara³

et al. 2022

AJC

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Layered nanosized mixed γ-zirconium titanium phosphates and fibrous cerium phosphate, γ-ZrxTi(1-x)..PO4.H2PO4.2H2O (γ-ZTP), Ce(HPO4)2.2.9H2O(nCePf), respectively, (x= 0.95, 0.89), and their [γ-ZrxTi(1-x).PO4. H2PO4]0.3 [Ce(HPO4)2]0.70. 2H2O nanocomposite membranes were prepared and characterized by chemical, x-ray diffraction (XRD), thermogravimetric analysis (TGA) and Fourier transform spectroscopy (FT-IR). Novel [γ-ZrxTi(1-x).PO4.H2PO4]0.3[Ce(HPO4)2]0.70 /polyaniline, polyindole, polycarbazole, and polyimidazole nanocomposite membranes were prepared via in-situ chemical oxidation of the monomers aniline, indole, carbazole and imidazole, respectively, that was promoted by the reduction of Ce(IV) ions present on the surface of the inorganic matrix composite. A possible explanation is nCePf occurs at the surface of the composite was attacked by the monomers, respectively, converted to cerium (III) orthophosphate (CePO4). The resultant novel composites were characterized by elemental (C,H,N) analysis and FT-IR. From elemental (C,H,N) analysis the % in weight of the resultant conducting polymers present in [γ-Zr0.95Ti0.05.PO4.H2PO4]0.3 [Ce(HPO4)2]0.70 composite were [ Pani 19.35, PIn 5,72. PCz 5.8, PIm 23.7]%. The % in weight of the conducting polymers in the composite [γ-Zr0.9Ti0.11.PO4.H2PO4]0.3[[Ce(HPO4)2]0.70 were [Pani 8.54, PIn 8.02, PCz 7.72, PIm 22.27]%. The conductivity of the resultant conducting polymers found to be in the range of semiconductors.

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“…Crystalline cerium phosphates have been studied as ion exchangers, intercalates and as proton conductance. Their composition, structure and the degree of crystallinity results from reaction of solutions containing a Ce IV salt is mixed with a solution of phosphoric acid of [(PO 4 )/Ce IV ratio] [17][18][19], strongly dependent on the experimental conditions such as rate and order of mixing of the solutions, stirring, temperature and digestion time [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Novel -Type Zirconium Phosphate-Crystalline Cerium Phosphate/ Polyaniline, Polyindole, Polycarbazole, Polyaniline-co-Polyindole, and Polyaniline-co-Polycarbazole Composites

Shakshooki¹,

El-Akari²,

Abozaid³

2021

AJC

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-Type zirconium phosphate,-Zr(HPO4)2-.1.77H2O (-ZrP), crystalline cerium phosphate, Ce(HPO4)2.1.33 H2O (CePc), and [-Zr(HPO4)2]0.30 [Ce (HPO4)2]0.70 .2H2O composite were prepared and characterized by chemical, XRD, TGA, FT-IR and scanning electron microscopy(SEM). [-Zr(HPO4)2]0.30[Ce(HPO4)2]0.70/polyaniline, polyindole, polycarbazole, polyaniline-co-polyindole, polyaniline-co-polycarbazole composites were prepared via in-situ chemical oxidation of the monomers aniline, indole , carbazole, and (1:1moler ratio) of co-monomers aniline-indole, aniline- carbazole, respectively, that was promoted by the reduction of part of Ce(IV) ions present in the inorganic matrix. A possible explanation is part of CePc is attacked by the monomers, and the co-monomers, respectively, converted to cerium (III) orthophosphate (CePO4). The resultant novel composites were characterized by elemental (C,H,N) analysis, FT-IR, and (SEM). From elemental (C,H,N) analysis ,the amount of organic materials present in [-Zr(HPO4)2]0.30 [Ce (HPO4)2]0.70/ polyaniline, polyindole, polycarbazole composites were (23.44, 5.24 and 33.02 % in wt. ), respectively. The amount of resultant copolymers were (Pani 5.92, PIn 7.48 % in wt) and (Pani 1.42, PCz 2.48 % in wt ) These composites can be considered as novel conducting inorganic-organic composites, ion exchangers , solid acid catalysts and sensors.

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Fibrous Cerium (IV) Acid Phosphates Host of Weak and Strong Lewis Bases

Cited by 11 publications

References 21 publications

Embedding Alkyldiamine into Layered α‐Titanium Phosphate via Direct‐Ion Exchange and its Application in Eu^III Removal from Water

Embedding Alkyldiamine into Layered α‐Titanium Phosphate via Direct‐Ion Exchange and its Application in Eu^III Removal from Water

γ-Zirconium Titanium-Phosphates – Fibrous Cerium Phosphate / Polyaniline, Polyindole, Polycarbazole and Polyimidazole Nanocomposite Membranes

Synthesis and Characterization of Novel -Type Zirconium Phosphate-Crystalline Cerium Phosphate/ Polyaniline, Polyindole, Polycarbazole, Polyaniline-co-Polyindole, and Polyaniline-co-Polycarbazole Composites

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Fibrous Cerium (IV) Acid Phosphates Host of Weak and Strong Lewis Bases

Cited by 11 publications

References 21 publications

Embedding Alkyldiamine into Layered α‐Titanium Phosphate via Direct‐Ion Exchange and its Application in EuIII Removal from Water

Embedding Alkyldiamine into Layered α‐Titanium Phosphate via Direct‐Ion Exchange and its Application in EuIII Removal from Water

γ-Zirconium Titanium-Phosphates – Fibrous Cerium Phosphate / Polyaniline, Polyindole, Polycarbazole and Polyimidazole Nanocomposite Membranes

Synthesis and Characterization of Novel -Type Zirconium Phosphate-Crystalline Cerium Phosphate/ Polyaniline, Polyindole, Polycarbazole, Polyaniline-co-Polyindole, and Polyaniline-co-Polycarbazole Composites

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Embedding Alkyldiamine into Layered α‐Titanium Phosphate via Direct‐Ion Exchange and its Application in Eu^III Removal from Water

Embedding Alkyldiamine into Layered α‐Titanium Phosphate via Direct‐Ion Exchange and its Application in Eu^III Removal from Water