The thermal decomposition of lanthanum(III), praseodymium(III) and europium(III) nitrates

Strydom, Christien A.; Vuuren, C.P.J. Van

doi:10.1016/0040-6031(88)87030-8

Cited by 17 publications

(6 citation statements)

References 2 publications

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“…When La(NO 3 ) 3 was used as precursor, the composition and crystalline structure of La coating could be significantly affected by the coating temperature 18–20 . In this research, ceramic granules were modified by La(NO 3 ) 3 , and the mixtures were thermally treated at 300 °C, 385 °C and 800 °C to represent dehydration, formation of LaONO 3 , and formation of La 2 O 3 , respectively.…”

Section: Resultsmentioning

confidence: 99%

“…La(NO 3 ) 3 ·6H 2 O was used as the precursor for the surface modification of ceramic granules. It is well established that, in the presence of ambient air, the thermal decomposition of La(NO 3 ) 3 ·6H 2 O proceeds through a series of steps that include dehydration, decomposition to LaONO 3 , La intermediate compounds and La 2 O 3 18–20 . The thermal treatment of La(NO 3 ) 3 ·6H 2 O-amended ceramic materials under different temperatures thus allowed for the systematic investigation on the effects of different types of La(III) modification on the removal of As(V) and Cr(VI).…”

Section: Methodsmentioning

confidence: 99%

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Removal of Arsenate and Chromate by Lanthanum-modified Granular Ceramic Material: The Critical Role of Coating Temperature

Yang

Yin

Bender

et al. 2019

Sci Rep

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The development of economical, low-maintenance, environmentally friendly and effective water filtration techniques can have far-reaching public health, social and economic benefits. In this research, a cost-effective La-modified granular ceramic material made of red art clay and recycled paper fiber was developed for the removal of two major anionic contaminants, As(V) (arsenate) and Cr(VI) (chromate). La modification temperature significantly impacted the resulting composition and properties of the adsorbents, and thus played a crucial role in the adsorbent performance. The La-modified ceramic materials were extensively characterized through scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) surface area measurement, thermal gravimetric analysis (TGA), zeta potential measurements, and Fourier-transform infrared spectroscopy (FTIR) analysis. The characterization results suggested that surface coating by LaONO 3 -related compounds was critical for As(V) and Cr(VI) adsorption. At the modification temperature of 385 °C, the adsorption of As(V) and Cr(VI) reached maximum, which were 23 mg/g and 13 mg/g, respectively, under circumneutral conditions that are relevant to various aquatic systems. The adsorption kinetics and isotherm, the influence of pH, ionic strength and coexisting anions on As(V) and Cr(VI) adsorption were investigated to further understand both As(V) and Cr(VI) adsorption behavior. Findings from this research showed that La-modified ceramic material made of recycled paper waste represents a cost-effective adsorbent for anionic contaminant removal under environmentally relevant conditions.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Removal of Arsenate and Chromate by Lanthanum-modified Granular Ceramic Material: The Critical Role of Coating Temperature

Yang

Yin

Bender

et al. 2019

Sci Rep

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“…Actually, most of the known structures of the lanthanide sulfates are focused on hydrous sulfates, only few structures of anhydrous sulfates have been reported because of the difficulties in obtaining single-crystals for the structure determinations [2,3]. On the other hand, as precursors of lanthanide oxide, lanthanide nitrates have ever been extensively studied on the thermal decomposition [4][5][6][7][8][9][10]. Moreover, a large number of structure determinations of the lanthanide nitrates have ever been performed [1], even if most of them are hydrates.…”

mentioning

confidence: 99%

Hydrothermal syntheses and crystal structures of two lanthanum compounds La(OH)SO 4 and LaO(NO 3 )

Zhang

Yang

et al. 2004

Inorganic Chemistry Communications

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“…Although the a 1 peak appears at ~60 °C in the DSC curve, no weight loss is observed here. In Section II (144–260 °C), the subsequent removal of water molecules takes place (peaks b 1 , c 1 , and d 1 [ 23 , 24 ]). Since Section III does not show any weight loss or thermal effects, this section can be taken to correspond to heating of the anhydrous Pr(NO 3 ) 3 .…”

Section: Resultsmentioning

confidence: 99%

Modernized Synthesis Technique of Pr2NiO4+δ-Based Complex Oxides Using Low-Temperature Salt Melts

2022

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Phases based on layered lanthanide nickelates are considered as promising electrode materials for various electrochemical devices, including solid oxide fuel cells and electrolysis cells. While such compounds may be prepared using either solid state or solution-assisted syntheses, each of these approaches entails certain problems. In the present work, we propose a novel approach for the simple and straightforward preparation of Pr2NiO4+δ-based materials. This approach involves co-melting of initial nitrate components, followed by high-temperature decomposition of the obtained mixture. The developed synthesis method exhibits a number of advantages over conventional techniques, enabling highly dispersed and single-phase powders to be obtained at a reduced synthesis temperature of 1050 °C. Therefore, the results of this work open new possibilities for the cost-effective preparation of Ruddlesden–Popper oxide phases.

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The thermal decomposition of lanthanum(III), praseodymium(III) and europium(III) nitrates

Cited by 17 publications

References 2 publications

Removal of Arsenate and Chromate by Lanthanum-modified Granular Ceramic Material: The Critical Role of Coating Temperature

Removal of Arsenate and Chromate by Lanthanum-modified Granular Ceramic Material: The Critical Role of Coating Temperature

Hydrothermal syntheses and crystal structures of two lanthanum compounds La(OH)SO 4 and LaO(NO 3 )

Modernized Synthesis Technique of Pr2NiO4+δ-Based Complex Oxides Using Low-Temperature Salt Melts

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