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Layered Double Hydroxides Synthesis and Applications
Research Guide
What is Layered Double Hydroxides Synthesis and Applications?
Layered double hydroxides synthesis and applications refer to the preparation methods and practical uses of LDH nanomaterials, which are hydrotalcite-like anionic clays featuring brucite-like layers with exchangeable anions, employed in catalysis, energy storage, drug delivery, and photocatalysis.
Layered double hydroxides (LDHs) comprise 25,172 published works in materials chemistry. These materials exhibit properties such as anion exchange, intercalation chemistry, and delamination into nanosheets. Key applications include catalytic processes, pseudocapacitive energy storage, and nanostructured biohybrid systems.
Topic Hierarchy
Research Sub-Topics
Layered Double Hydroxide Nanosheet Synthesis
Researchers develop exfoliation, delamination, and bottom-up methods like urea hydrolysis for atomically thin LDH nanosheets with high aspect ratios. Characterization via AFM and stability in dispersions are studied.
Anion Exchange Properties of Layered Double Hydroxides
This sub-topic investigates intercalation kinetics, selectivity, and memory effects in LDH anion exchangers for Cl-, NO3-, and organic anions. Applications in water purification and controlled release are explored.
Layered Double Hydroxides as Catalysts
Studies focus on mixed metal oxide-derived LDHs for base-catalyzed biodiesel transesterification, CO2 capture, and mixed-feedstock reforming, emphasizing active site reconstruction and stability.
Layered Double Hydroxide Drug Delivery Systems
Research designs LDH nanocarriers for nucleic acids, anticancer drugs, and proteins via co-precipitation and layer-by-layer assembly, evaluating pH-responsive release and biocompatibility.
Layered Double Hydroxides as Photocatalysts
This area explores Z-scheme heterojunctions, dye sensitization, and noble metal loading on LDHs for H2 evolution, CO2 reduction, and pollutant degradation under visible light.
Why It Matters
Layered double hydroxides enable anion exchange for applications in catalysis and environmental remediation, as demonstrated by Miyata (1983) who measured ion-exchange isotherms for hydrotalcite-like compounds with anions including NO₃⁻, Cl⁻, SO₄²⁻, F⁻, Br⁻, I⁻, OH⁻, CO₃²⁻, and Naphthol Yellow S²⁻, showing changes in basal spacing via the 003 reflection. In energy storage, Augustyn et al. (2014) highlighted pseudocapacitive behavior of oxide materials like LDHs for high-rate electrochemical systems. Wang and O’Hare (2012) detailed LDH nanosheets in drug delivery and photocatalysis, while Cavani, Trifiró, and Vaccari (1991) established their foundational role in heterogeneous catalysis with 5818 citations.
Reading Guide
Where to Start
"Hydrotalcite-type anionic clays: Preparation, properties and applications." by Cavani, Trifiró, and Vaccari (1991) provides the foundational overview of LDH structure, synthesis, and catalytic uses, serving as the essential starting point with 5818 citations.
Key Papers Explained
Cavani, Trifiró, and Vaccari (1991) established LDH fundamentals including preparation and catalysis. Miyata (1983) built on this by quantifying anion-exchange properties through isotherms and basal spacing measurements. Wang and O’Hare (2012) advanced to modern nanosheet synthesis and applications, while Augustyn, Simon, and Dunn (2014) extended LDH utility to pseudocapacitive energy storage.
Paper Timeline
Most-cited paper highlighted in red. Papers ordered chronologically.
Advanced Directions
Research frontiers involve refining delamination for LDH nanosheets and exploring intercalation in biohybrid materials, as per Wang and O’Hare (2012). Emphasis remains on anion exchange for catalysis (Miyata 1983) and pseudocapacitance (Augustyn et al. 2014), with no recent preprints available.
Papers at a Glance
| # | Paper | Year | Venue | Citations | Open Access |
|---|---|---|---|---|---|
| 1 | Hydrotalcite-type anionic clays: Preparation, properties and a... | 1991 | Catalysis Today | 5.8K | ✕ |
| 2 | Pseudocapacitive oxide materials for high-rate electrochemical... | 2014 | Energy & Environmental... | 5.1K | ✓ |
| 3 | The Isoelectric Points of Solid Oxides, Solid Hydroxides, and ... | 1965 | Chemical Reviews | 3.4K | ✕ |
| 4 | Recent Advances in the Synthesis and Application of Layered Do... | 2012 | Chemical Reviews | 3.3K | ✕ |
| 5 | Generalized syntheses of large-pore mesoporous metal oxides wi... | 1998 | Nature | 2.5K | ✕ |
| 6 | A review on polymer–layered silicate nanocomposites | 2008 | Progress in Polymer Sc... | 2.5K | ✓ |
| 7 | High Dielectric Constant in ACu3Ti4O12 and ACu3Ti3FeO12 Phases | 2000 | Journal of Solid State... | 2.0K | ✕ |
| 8 | A Neutral Templating Route to Mesoporous Molecular Sieves | 1995 | Science | 1.8K | ✕ |
| 9 | Periodic mesoporous organosilicas with organic groups inside t... | 1999 | Nature | 1.7K | ✕ |
| 10 | Anion-Exchange Properties of Hydrotalcite-Like Compounds | 1983 | Clays and Clay Minerals | 1.7K | ✕ |
Frequently Asked Questions
What are hydrotalcite-type anionic clays?
Hydrotalcite-type anionic clays are layered double hydroxides with brucite-like layers and exchangeable anions. Cavani, Trifiró, and Vaccari (1991) reviewed their preparation, properties, and applications in catalysis. These materials support anion exchange and catalytic processes.
How are LDH nanosheets synthesized?
LDH nanosheets are synthesized through delamination techniques and direct methods. Wang and O’Hare (2012) outlined recent advances in their synthesis and applications. These approaches yield ultrathin sheets for enhanced reactivity in catalysis and drug delivery.
What are the anion-exchange properties of hydrotalcite-like compounds?
Hydrotalcite-like compounds exhibit selective anion exchange with isotherms for ions like Cl⁻, SO₄²⁻, and CO₃²⁻. Miyata (1983) determined spacing and width of the 003 reflection as a function of exchanged anions. This property enables applications in adsorption and purification.
What catalytic applications do LDHs have?
LDHs serve as catalysts in heterogeneous reactions due to their layered structure and basic sites. Cavani, Trifiró, and Vaccari (1991) documented their use in various catalytic processes. Anion exchange enhances selectivity in these applications.
How do LDHs contribute to energy storage?
LDHs display pseudocapacitive behavior for high-rate electrochemical energy storage. Augustyn, Simon, and Dunn (2014) described oxide materials including LDHs in this context. Their layered structure supports fast ion intercalation.
What is the current state of LDH research?
LDH research encompasses 25,172 papers focused on synthesis, nanosheets, and applications like photocatalysis and drug delivery. Wang and O’Hare (2012) reviewed nanosheet advances with 3340 citations. The field emphasizes delamination and layer-by-layer assembly.
Open Research Questions
- ? How can delamination techniques be optimized for scalable production of single-layer LDH nanosheets?
- ? What factors control anion selectivity in intercalation chemistry of LDHs under dynamic conditions?
- ? How do LDH compositions influence pseudocapacitive performance in hybrid energy storage devices?
- ? What interlayer modifications enhance LDH stability for long-term photocatalysis?
- ? How do biohybrid LDH nanostructures improve targeted drug delivery efficiency?
Recent Trends
The field of layered double hydroxides maintains 25,172 works with sustained focus on synthesis of nanosheets and applications in catalysis and energy storage, as reviewed by Wang and O’Hare with 3340 citations.
2012No growth rate data or recent preprints are available, indicating stable interest anchored in foundational papers like Cavani et al. .
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