LA6644 مسحوق كربونات اللانثانوم والسيريم ((LaCe)2(CO3)3)

Lanthanum Cerium Carbonate Powder ((LaCe)2(CO3)3) Description

Lanthanum Cerium Carbonate Powder ((LaCe)₂(CO₃)₃) is a mixed rare-earth carbonate characterized by a crystalline structure where lanthanum (La³⁺) and cerium (Ce³⁺/Ce⁴⁺) ions are uniformly distributed within a carbonate matrix. Its structure typically adopts a hexagonal or monoclinic lattice system, common among rare-earth carbonates, with alternating layers of metal cations and planar CO₃²⁻ groups. The compound appears as a fine, white to off-white powder with moderate solubility in water, though it readily decomposes in acidic solutions, releasing CO₂ gas. Thermally, it exhibits high stability up to 400-600°C, beyond which it undergoes calcination to form mixed oxides (La₂O₃ and CeO₂) while emitting carbon dioxide. The material is hygroscopic, gradually absorbing moisture from humid environments, which may alter its surface properties. Chemically, it demonstrates redox activity due to the presence of cerium ions, capable of transitioning between Ce³⁺ and Ce⁴⁺ oxidation states under specific conditions. Its density ranges between 3.5-4.5 g/cm³, showing low electrical conductivity typical of ionic carbonates. The powder’s particle morphology varies with synthesis methods, often appearing as irregular microcrystalline aggregates with moderate surface area. Its stability in ambient conditions and unique ion-exchange properties stem from the synergistic interaction between lanthanum’s Lewis acidity and cerium’s redox versatility within the carbonate framework.

Lanthanum Cerium Carbonate Powder ((LaCe)2(CO3)3) Applications

1. Wastewater Treatment: Phosphate Adsorption

Used to remove phosphates from water via ligand exchange (e.g., La/FeOOH@PAC composites achieve adsorption capacities up to 65.36 mg/g, enhanced under acidic conditions).

2. Catalysis and Materials Science

Thermal decomposition yields oxides (La₂O₃/CeO₂) for catalytic applications (e.g., enhancing Pt-Rh catalyst stability in automotive exhaust systems or enabling methane-to-C₂ hydrocarbon conversion in electric field-assisted reactions).

3. Agriculture: Crop Enhancement and Soil Remediation

Modulates plant growth and reduces heavy metal uptake (e.g., cerium foliar sprays boost rapeseed yield while lowering Cu/Cd accumulation compared to lanthanum).

4. Medical Applications: Phosphate Binders

Structural analogs like lanthanum carbonate are clinically used to treat hyperphosphatemia in chronic kidney disease by binding dietary phosphates in the gut.

5. Energy and Photocatalysis

Derived materials enable selective CO₂ reduction (e.g., Z-scheme heterojunction catalysts achieve near 100% CO selectivity), advancing clean energy technologies.

Lanthanum Cerium Carbonate Powder ((LaCe)2(CO3)3) Packaging

Our products are packaged in customized cartons of various sizes based on the material dimensions. Small items are securely packed in PP boxes, while larger items are placed in custom wooden crates. We ensure strict adherence to packaging customization and the use of appropriate cushioning materials to provide optimal protection during transportation.

Packaging: Carton, Wooden Box, or Customized.

Kindly review the packaging details provided for your reference.

Manufacturing Process

1.       Testing Method

(1)    Chemical Composition Analysis - Verified using techniques such as GDMS or XRF to ensure compliance with purity requirements.

(2)    Mechanical Properties Testing - Includes tensile strength, yield strength, and elongation tests to assess material performance.

(3)    Dimensional Inspection - Measures thickness, width, and length to ensure adherence to specified tolerances.

(4)    Surface Quality Inspection - Checks for defects such as scratches, cracks, or inclusions through visual and ultrasonic examination.

(5)    Hardness Testing - Determines material hardness to confirm uniformity and mechanical reliability.

Please refer to the SAM testing procedures for detailed information.

Lanthanum Cerium Carbonate Powder ((LaCe)2(CO3)3) FAQs

Q1. What are the main application areas of the product?

It is mainly used for phosphate adsorption in wastewater, industrial catalyst preparation, agricultural soil remediation, photocatalytic clean energy technology, as well as a phosphate binding agent in medicine (e.g., similar to lanthanum carbonate for clinical use).

Q2. What are the physical form and storage conditions of the product?

The product is white to light yellow microcrystalline powder. It is recommended to be stored in a dry and cool environment (temperature <30°C, humidity <60%) under sealed conditions, avoiding contact with acids or strong oxidizing agents.

Q3. Does it support high temperature applications?

Yes, the product remains stable below 600°C, and lanthanum/cerium oxide (La₂O₃/CeO₂) can be generated after decomposition at high temperature, which is suitable for high-temperature scenarios such as catalyst carriers.

Performance Comparison Table with Competitive Products

Related Information

1.       Common Preparation Methods

The preparation of Lanthanum Cerium Carbonate Powder typically involves several advanced synthetic routes tailored to achieve specific structural or functional properties. A widely adopted method is the coprecipitation technique, where aqueous solutions of lanthanum (LaCl₃) and cerium (CeCl₃) chlorides are mixed in stoichiometric ratios, followed by the controlled addition of sodium carbonate (Na₂CO₃) or ammonium carbonate under alkaline conditions (pH > 10). The resulting precipitate is thoroughly washed, dried at 60-90°C, and ground into a fine powder. Key parameters such as pH, temperature, and precursor ratios directly influence crystallinity, particle size, and La/Ce homogeneity.

For applications requiring enhanced surface area or hierarchical porosity, a templating approach is employed. Surfactants like sodium dodecyl sulfate (SDS) form micellar templates in aqueous solutions, guiding the assembly of La³⁺ and Ce³⁺ ions into ordered structures. Subsequent carbonate precipitation and template removal via calcination or solvent extraction yield materials with tailored morphologies, such as layered or mesoporous frameworks, ideal for catalysis or adsorption.

Supported composite synthesis integrates the carbonate with carriers like biochar or activated carbon to improve recyclability and stability. For example, biochar derived from agricultural waste (e.g., corn stalks) is impregnated with La/Ce salt solutions, followed by hydroxide/carbonate precipitation under high pH. Thermal activation at 500°C strengthens the bond between the carbonate and carrier, optimizing performance in phosphate removal.

To produce nanoscale particles with uniform size distribution, solvothermal methods are utilized. Precursor salts and urea are dissolved in a glycol-water mixture, subjected to hydrothermal treatment at 150-200°C for 12-24 hours. This method enables precise control over crystal growth, yielding nanoparticles suitable for high-dispersion applications like photocatalysis.

Characterization techniques such as XRD, SEM, FT-IR, and XRF are critical for verifying phase purity, morphology, surface functional groups, and elemental composition. Method selection depends on target applications: coprecipitation suits industrial-scale production due to simplicity and cost-effectiveness, while templating or solvothermal methods prioritize performance optimization for specialized uses. Adjusting synthesis parameters (e.g., pH, surfactants, thermal conditions) allows fine-tuning of material properties to meet diverse functional requirements.