Bifunctional lanthanum phosphate substrates as novel adsorbents and biocatalyst supports for perchlorate removal

Sankar, Sasidharan; Prajeesh, Gangadharan Puthiya Veetil; Anupama, V. N.; Krishnakumar, B.; Hareesh, P.; Nair, Balagopal N.; Warrier, K. G. K.; Hareesh, U. S.

doi:10.1016/j.jhazmat.2014.04.046

Cited by 9 publications

(8 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2c ) opens up possibilities for fabricating very stable ceramic hydrophobic surfaces from cheap rare earth resources containing all types of mixture of rare earth metal ions. Moreover, LaPO 4 could also be made in phase pure form by the controlled addition of phosphoric acid to a variety of lanthanum salts such as nitrates, carbonates and chlorides 16 17 18 19 . This indicates the possibility of generating versatile hydrophobic materials easily and economically from any rare earth based chemical precursors or even ‘rare-earth wastes’ that could otherwise cause serious waste disposal concerns.…”

Section: Resultsmentioning

confidence: 99%

“…La being the cheapest and the most abundant among rare earth elements, it is important to develop a La-based chemically, thermally and mechanically stable material having easy processability and non-toxicity. Over the years, our group has been active in the development of LaPO 4 based nanomaterials and structures for various functional applications that are unique to lanthanides 16 17 18 19 . In this paper, we have attempted to investigate in detail experimentally and also through first principles simulations, the surface wetting characteristics of LaPO 4 .…”

mentioning

confidence: 99%

See 1 more Smart Citation

Hydrophobic and Metallophobic Surfaces: Highly Stable Non-wetting Inorganic Surfaces Based on Lanthanum Phosphate Nanorods

Sankar

Nair

Suzuki

et al. 2016

Sci Rep

Self Cite

View full text Add to dashboard Cite

Metal oxides, in general, are known to exhibit significant wettability towards water molecules because of the high feasibility of synergetic hydrogen-bonding interactions possible at the solid-water interface. Here we show that the nano sized phosphates of rare earth materials (Rare Earth Phosphates, REPs), LaPO4 in particular, exhibit without any chemical modification, unique combination of intrinsic properties including remarkable hydrophobicity that could be retained even after exposure to extreme temperatures and harsh hydrothermal conditions. Transparent nanocoatings of LaPO4 as well as mixture of other REPs on glass surfaces are shown to display notable hydrophobicity with water contact angle (WCA) value of 120° while sintered and polished monoliths manifested WCA greater than 105°. Significantly, these materials in the form of coatings and monoliths also exhibit complete non-wettability and inertness towards molten metals like Ag, Zn, and Al well above their melting points. These properties, coupled with their excellent chemical and thermal stability, ease of processing, machinability and their versatile photo-physical and emission properties, render LaPO4 and other REP ceramics utility in diverse applications.

show abstract

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Hydrophobic and Metallophobic Surfaces: Highly Stable Non-wetting Inorganic Surfaces Based on Lanthanum Phosphate Nanorods

Sankar

Nair

Suzuki

et al. 2016

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…Fumed silica (purity 99.8%, Aldrich Chemicals, USA), Li 2 CO 3 (98%), Na 2 CO 3 (99.9%), and K 2 CO 3 (99.8%, all carbonates procured from Merck, India) were used as raw materials for the preparation of lithium-silicate-based eutectic mixtures (M 4 SiO 4 ). For composite preparation, LaPO 4 was synthesized as per procedure reported elsewhere, Y 2 O 3 (99.9%) and Gd 2 O 3 (99.9%) were procured from Aldrich Chemicals, USA. Surface area values (BET) of the precursor powders were measured as 46.3, 0.7, and 2.5 m 2 g –1 , and particle sizes (SEM/TEM) were measured as ∼50–100, ∼200–300, and ∼800 nm for LaPO 4 , Y 2 O 3 , and Gd 2 O 3 , respectively.…”

Section: Methodsmentioning

confidence: 99%

CO₂ Absorption Studies on Mixed Alkali Orthosilicates Containing Rare-Earth Second-Phase Additives

et al. 2015

Self Cite

View full text Add to dashboard Cite

Lithium silicate containing eutectic orthosilicate mixtures developed by a solid-state route displayed excellent characteristics as carbon dioxide absorbents at elevated temperature, showing absorption capacity of 256 mg g −1 . Incorporation of second-phase materials was investigated as a strategy to enhance the stability of the absorbent materials against agglomeration and sintering during powder processing and high-temperature cyclic absorption/desorption loading. Yttrium oxide, gadolinium oxide, and lanthanum phosphate were added as second phases to the absorbent. It was found that when the composites were rich in absorbents (10:1 and 20:1 absorbent/second phase), the absorption performance was hardly influenced by the type of the secondphase material present. Yttrium oxide or gadolinium oxide additions in large quantities were found to enhance the absorption capacity of the orthosilicate phase. The 2:1 sample containing yttrium oxide gave absorption capacity of 315 mg g −1 of orthosilicate absorbent present in the composite sample. On the basis of the structural and morphological studies, we believe that the nonreactive second-phase components formed a virtual shell against the segregation of absorbent phase, thereby helping to improve their absorption performance. Cyclic studies have supported the superior stability and performance of such composite absorbent materials.

show abstract

“…The mentioned reasons show the necessity to develop such methods for synthesizing lanthanum orthophosphate nanopowders that would ensure their morphological characteristics, dispersion and phase composition necessary for obtaining materials with high-level properties. There exist several methods for synthesizing lanthanum orthophosphate nanoparticles, for example, the sol-gel method [21][22][23], hydrothermal synthesis [24,24,25], and the microwave heating synthesis [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Formation of rhabdophane-structured lanthanum orthophosphate nanoparticles in an impinging-jets microreactor and rheological properties of sols based on them

Проскурина¹,

Sivtsov²,

Enikeeva³

et al. 2019

Nanosystems: Phys. Chem. Math.

View full text Add to dashboard Cite

A free impinging-jets microreactor was used for synthesizing rhabdophane-structured LaPO 4 sols. The rheological behavior was investigated for the sols obtained both by reagents mixing in a microreactor, and by pouring the initial solutions together and mixing them on a magnetic stirrer. Lanthanum phosphate sols obtained by two ways are structured systems characterized by deformation behavior accompanied by shear liquefaction. Some discovered anomalies were found to be associated with flow nonequilibrium at low shear rates, which indirectly indicates stronger binding of particles in the structure of samples obtained by the microreactor synthesis.

show abstract

Bifunctional lanthanum phosphate substrates as novel adsorbents and biocatalyst supports for perchlorate removal

Cited by 9 publications

References 37 publications

Hydrophobic and Metallophobic Surfaces: Highly Stable Non-wetting Inorganic Surfaces Based on Lanthanum Phosphate Nanorods

Hydrophobic and Metallophobic Surfaces: Highly Stable Non-wetting Inorganic Surfaces Based on Lanthanum Phosphate Nanorods

CO₂ Absorption Studies on Mixed Alkali Orthosilicates Containing Rare-Earth Second-Phase Additives

Formation of rhabdophane-structured lanthanum orthophosphate nanoparticles in an impinging-jets microreactor and rheological properties of sols based on them

Contact Info

Product

Resources

About

Bifunctional lanthanum phosphate substrates as novel adsorbents and biocatalyst supports for perchlorate removal

Cited by 9 publications

References 37 publications

Hydrophobic and Metallophobic Surfaces: Highly Stable Non-wetting Inorganic Surfaces Based on Lanthanum Phosphate Nanorods

Hydrophobic and Metallophobic Surfaces: Highly Stable Non-wetting Inorganic Surfaces Based on Lanthanum Phosphate Nanorods

CO2 Absorption Studies on Mixed Alkali Orthosilicates Containing Rare-Earth Second-Phase Additives

Formation of rhabdophane-structured lanthanum orthophosphate nanoparticles in an impinging-jets microreactor and rheological properties of sols based on them

Contact Info

Product

Resources

About

CO₂ Absorption Studies on Mixed Alkali Orthosilicates Containing Rare-Earth Second-Phase Additives