Niobium Hydroxide Oxide: Properties, Uses & FAQs

Niobium hydroxide oxide is an inorganic niobium oxyhydroxide compound that serves as a versatile precursor and functional material in catalysis, ceramics, and advanced materials research.

Chemical Name

Niobium hydroxide oxide

Common Formula

NbO(OH) or NbOOH

CAS / SKU

SKU N1539889 (Aladdin Scientific)

Appearance

White to off-white powder or gel

Solubility

Insoluble in water; soluble in strong acids and bases

Primary Use

Catalyst precursor, ceramic synthesis, and niobium oxide preparation

What Is Niobium Hydroxide Oxide?

Niobium hydroxide oxide, often written as NbO(OH) or NbOOH, is an inorganic compound belonging to the family of transition-metal oxyhydroxides. It is typically obtained as a white or off-white amorphous powder or gel formed by the controlled hydrolysis of niobium alkoxides, niobium chloride (NbCl₅), or other niobium salts under aqueous or solvothermal conditions.

The compound occupies a compositional space between niobium pentoxide (Nb₂O₅) and niobium hydroxide, and its structure can vary depending on synthesis conditions, pH, and thermal history. Upon calcination, niobium hydroxide oxide readily converts to crystalline Nb₂O₅, making it an important intermediate in niobium oxide processing.

Key Properties and Specifications

The key physicochemical properties of niobium hydroxide oxide relevant to laboratory use are summarized below:

• Molecular formula: NbO(OH) or NbOOH; empirical Nb₂O₅·nH₂O
• Appearance: White to off-white amorphous powder or gel
• Solubility: Practically insoluble in water; dissolves in concentrated mineral acids (e.g., HF, H₂SO₄) and concentrated alkaline solutions
• Thermal behavior: Dehydration and crystallization to Nb₂O₅ occur upon heating, typically above 300–500 °C, depending on crystallinity and particle size
• Amphoteric character: Exhibits weak amphoteric behavior, reacting with both strong acids and strong bases
• Surface area: Can exhibit high specific surface area in the amorphous gel form, which is advantageous for catalytic applications

Researchers should request a Certificate of Analysis (CoA) for lot-specific purity data when ordering SKU N1539889 from Aladdin Scientific.

Research and Industrial Applications

Niobium hydroxide oxide finds use across several research and applied domains:

• Catalyst precursor: Calcination of niobium hydroxide oxide yields Nb₂O₅, a solid acid catalyst used in dehydration, esterification, and photocatalytic reactions. The oxyhydroxide intermediate can itself display surface acidity.
• Ceramics and electronic materials: Acts as a starting material for the synthesis of niobate ceramics (e.g., lithium niobate, potassium niobate) used in piezoelectric and ferroelectric devices.
• Sol-gel processing: The gel form is valuable in sol-gel routes to produce thin films, coatings, and porous niobium oxide structures.
• Battery and supercapacitor research: Niobium-based oxides derived from this precursor are investigated as anode materials in lithium-ion and sodium-ion batteries.
• Photocatalysis: Niobium oxyhydroxide surfaces have been studied for visible-light-driven photocatalytic degradation of organic pollutants.

Safe Handling, Storage, and Disposal

As with all laboratory reagents, proper handling of niobium hydroxide oxide is essential for safety and to maintain material integrity:

• Personal protective equipment (PPE): Use gloves, safety glasses, and a lab coat. When handling fine powder, use a dust mask or work in a ventilated enclosure to avoid inhalation of particulates.
• Storage: Store in a tightly sealed container in a cool, dry, and well-ventilated area. Keep away from strong acids and strong bases unless intentional dissolution is planned. Typical storage at room temperature is acceptable for the solid form.
• Stability: The material is generally stable under normal storage conditions but may slowly absorb atmospheric moisture, which can alter stoichiometry. Seal containers after use.
• Disposal: Dispose of in accordance with local regulations for inorganic niobium-containing waste. Niobium is not classified as acutely toxic, but institutional waste disposal guidelines should be followed.
• First aid: In case of skin or eye contact, rinse thoroughly with water. Seek medical advice if irritation persists.

Always consult the Safety Data Sheet (SDS) provided by Aladdin Scientific for SKU N1539889 before use.

Ordering and Quality Assurance

Aladdin Scientific supplies niobium hydroxide oxide under SKU N1539889. When placing an order or evaluating the product, consider the following:

• Certificate of Analysis (CoA): Request a lot-specific CoA to confirm purity, moisture content, and particle size distribution before use in sensitive experiments.
• Quantity options: Contact Aladdin Scientific's sales team for available pack sizes and bulk pricing for large-scale research or industrial procurement.
• Custom specifications: If your application requires a specific particle size, surface area, or purity grade, inquire about custom preparation options.
• Lead time: Check product availability on the Aladdin Scientific website or contact customer service for current stock status and estimated delivery times.
• Returns and quality complaints: Aladdin Scientific's returns and refunds policy applies; contact customer service with your order number and CoA if a quality issue is identified upon receipt.

Frequently asked questions

What is the difference between niobium hydroxide oxide and niobium pentoxide (Nb₂O₅)?

Niobium hydroxide oxide (NbOOH) is a hydrated, partially hydroxylated intermediate that retains hydroxyl groups within its structure, whereas niobium pentoxide (Nb₂O₅) is the fully dehydrated, anhydrous oxide. Upon calcination at temperatures typically above 300–500 °C, niobium hydroxide oxide loses water and hydroxyl groups to yield crystalline Nb₂O₅. For applications requiring the anhydrous oxide, niobium hydroxide oxide serves as a convenient, readily handleable precursor.

Is niobium hydroxide oxide soluble in water, and how can I dissolve it for solution-phase experiments?

Niobium hydroxide oxide is practically insoluble in water under neutral conditions. To bring it into solution for aqueous experiments, it can be dissolved in concentrated mineral acids such as hydrofluoric acid (HF) or sulfuric acid, or in concentrated alkaline solutions. Alternatively, niobium alkoxide precursors may be more suitable if a homogeneous niobium solution is required from the outset. Always observe appropriate safety precautions when handling concentrated acids or bases.

How should niobium hydroxide oxide be stored to prevent degradation?

Store niobium hydroxide oxide in a tightly sealed container in a cool, dry, and well-ventilated area away from moisture and incompatible chemicals such as strong acids and bases. The amorphous form is hygroscopic and can absorb atmospheric water, potentially altering its stoichiometry over time. Always reseal the container promptly after use and consult the Aladdin Scientific SDS for SKU N1539889 for full storage guidance.

Can niobium hydroxide oxide be used directly as a catalyst, or does it need to be converted to Nb₂O₅ first?

Niobium hydroxide oxide can exhibit intrinsic surface acidity and has been used directly as a solid acid catalyst in some reactions, particularly in its amorphous gel form which offers a high surface area. However, for many catalytic applications, it is calcined to produce Nb₂O₅ with a defined crystal phase and surface area. The choice depends on the specific reaction requirements and the desired acid site density and strength.

What purity grades are available for Aladdin Scientific's niobium hydroxide oxide (SKU N1539889)?

Specific purity grade details for SKU N1539889 are provided on the product page and in the Certificate of Analysis (CoA) for each lot. Contact Aladdin Scientific's customer service or sales team for current specifications, available grades, and lot-specific CoA documents prior to purchase.

References

1. Tanabe, K.; Okazaki, S. Various reactions catalyzed by niobium compounds and materials. Applied Catalysis A: General, 1995.
2. Nowak, I.; Ziolek, M. Niobium Compounds: Preparation, Characterization, and Application in Heterogeneous Catalysis. Chemical Reviews, 1999, 99(12), 3603–3624.
3. Aladdin Scientific. Product page: Niobium hydroxide oxide, SKU N1539889. Retrieved from https://www.aladdin-e.com

Products are supplied for research and development use only. Not for use in humans, animals, diagnosis, or therapy.