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Permanently polarized hydroxyapatite, an outstanding catalytic material for carbon and nitrogen fixation

MATERIALS HORIZONS (2022)

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Article Chemistry, Multidisciplinary

Polarized Hydroxyapatite: New Insights and Future Perspectives Through Systematic Electrical Characterization at the Interface

Jordi Sans et al.

Summary: The design of hydroxyapatite (HAp) with customized electrical properties is of special interest for developing technological and biomedical applications with new improved functionalities. Polarized HAp, obtained by applying an external electric voltage at high temperature, has been shown as an alternative to doped-HAp. This work extensively characterizes polarized HAp using electrochemical impedance spectroscopy and proposes a unified electrical equivalent circuit model to explain its properties. The study provides necessary insights into the polarization treatment and opens up a pathway for new applications based on dopant-free polarized HAp in biomedical and technological fields.

ADVANCED MATERIALS INTERFACES (2022)

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Article Engineering, Environmental

Hydroxyapatite-based biphasic catalysts with plasticity properties and its potential in carbon dioxide fixation

Jordi Sans et al.

Summary: This study investigates the interaction between hydroxyapatite and brushite at high temperatures, finding that the catalyst composed of these two materials can produce formic acid or acetic acid depending on the ratio. The results demonstrate the plasticity of this catalyst system and its potential as a green alternative for CO2 fixation.

CHEMICAL ENGINEERING JOURNAL (2022)

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Article Chemistry, Multidisciplinary

3D Printing Hydrogel Scaffolds with Nanohydroxyapatite Gradient to Effectively Repair Osteochondral Defects in Rats

Hui Zhang et al.

Summary: In this study, a 3D printed gradient hydrogel scaffold with nanohydroxyapatite (nHA) gradients was designed to promote osteochondral (OC) defect repair. The results showed that the bone marrow stromal cells (BMSCs)-loaded gradient scaffolds demonstrated superior repair outcomes compared to other scaffolds, indicating great potential for future practical applications.

ADVANCED FUNCTIONAL MATERIALS (2021)

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Article Nanoscience & Nanotechnology

Hydroxyapatite Coated with Co-Based Metal Organic Framework Nanoparticles as Heterojunctions for Catalytic Degradation of Organics

Bozhen Li et al.

Summary: HA nanowires (HAnW) were used as carriers and promoters to synthesize a HAnW@CoMOF heterojunction, which showed excellent degradation efficiency for organic pollutants, with a removal rate of 97% for tetracycline (TC). The catalytic mechanism involving the formation of Co-OH+ in the HAnW@CoMOF heterojunction was investigated. This study provides a green and effective catalyst for organic pollutant degradation.

ACS APPLIED NANO MATERIALS (2021)

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Article Chemistry, Multidisciplinary

Controlled Anisotropic Growth of Hydroxyapatite by Additive-Free Hydrothermal Synthesis

Jordi Sans et al.

Summary: This study introduces a new additive-free synthetic route for controlling the shape and size of hydroxyapatite (HAp), based on the use of hydrothermal method and non-aqueous solvents. This method, using only organic solvents and pH control, can produce pure and crystalline HAp with controlled shape and size. It elucidates some key aspects of the crystal growth mechanism and allows the synthesis of HAp crystals with different and well-defined shapes and sizes in a reproducible way.

CRYSTAL GROWTH & DESIGN (2021)

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Article Chemistry, Physical

Direct piezocatalytic conversion of methane into alcohols over hydroxyapatite

Yuanyi Zhou et al.

Summary: The cascading of methane valorization and methanol upgrade is a promising strategy to fabricate value-added chemicals directly. Piezocatalytic effect of HAp and ultrasonic vibration drive methane conversion into alcohols without CO or CO2 generation. The enriched SC of HAp tunes surface acid-base property for a new approach to C-C coupling.

NANO ENERGY (2021)

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Article Chemistry, Physical

Atom Probe Tomography of Encapsulated Hydroxyapatite Nanoparticles

Daniel S. Mosiman et al.

Summary: Two techniques were developed to encapsulate and prepare HAP NPs into APT tips for characterization, revealing significant tradeoffs between encapsulant methods/materials for HAP characterization and the need for further technique development to select a more robust approach. This work serves as an essential starting point for advancing knowledge about the nanoscale spatiochemistry of HAP NPs.

SMALL METHODS (2021)

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Article Chemistry, Physical

Optimization of permanently polarized hydroxyapatite catalyst. Implications for the electrophotosynthesis of amino acids by nitrogen and carbon fixation

Jordi Sans et al.

Summary: Enhanced catalytic activity of permanently polarized hydroxyapatite depends on experimental conditions for preparation and polarization parameters. A mineral similar to brushite on highly crystalline hydroxyapatite affects nitrogen and carbon fixation, allowing for customization of the Gly/Ala ratio.

JOURNAL OF CATALYSIS (2021)

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Article Chemistry, Multidisciplinary

Regulating the Superficial Vacancies and OH- Orientations on Polarized Hydroxyapatite Electrocatalysts

Jordi Sans et al.

Summary: This article reports the first direct observation that allows the characterization of both the generation of vacancies and the polarization of OH-groups in hydroxyapatite materials. The mechanisms behind the electrical enhancement are elucidated, showing the significant impact of charge accumulation at micrometric grain boundaries on the catalytic properties of thermally stimulated polarized HAp. These results will be used for further optimization of catalyst properties.

ADVANCED MATERIALS INTERFACES (2021)

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Article Chemistry, Physical

Enhanced CO2 Conversion into Ethanol by Permanently Polarized Hydroxyapatite through C-C Coupling

Jordi Sans et al.

Summary: Hydroxyapatite is a naturally occurring mineral of biomedical importance due to its similarity with human hard tissues. Polarized HAp shows enhanced catalytic behavior, converting CO2 and CH4 mixtures into low carbon organic molecules, with optimization leading to increased ethanol production.

CHEMCATCHEM (2021)

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Article Engineering, Biomedical

Development of novel gene carrier using modified nano hydroxyapatite derived from equine bone for osteogenic differentiation of dental pulp stem cells

Myung Chul Lee et al.

Summary: The research team successfully extracted nanohydroxyapatite from natural resources, developed it as a molecular biological tool and coated it with polyethylenimine to act as a gene carrier, demonstrating its advantages in cell transfection and gene delivery. Through transfecting the gene carrier pEH, osteogenic differentiation of stem cells was induced, leading to increased expression levels of osteogenesis-related genes.

BIOACTIVE MATERIALS (2021)

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Review Green & Sustainable Science & Technology

Development and Recent Progress on Ammonia Synthesis Catalysts for Haber-Bosch Process

John Humphreys et al.

Summary: Ammonia synthesis from nitrogen and hydrogen is a crucial chemical process with the development of efficient catalysts being a key focus. New catalysts are being developed to improve efficiency and sustainability in ammonia production. The continued innovation in catalysts for the Haber-Bosch process is essential for the future of green ammonia production.

ADVANCED ENERGY AND SUSTAINABILITY RESEARCH (2021)

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Article Engineering, Environmental

Copper Loaded Hydroxyapatite Nanoparticles as eco-friendly Fenton-like catalyst to Effectively Remove Organic Dyes

Abdallah Amedlous et al.

Summary: In this study, copper loaded hydroxyapatite materials were synthesized and used as a catalyst for the degradation of toxic organic compounds. The materials showed high catalytic activity for the degradation of methylene blue in the presence of H2O2.Various physico-chemical techniques were used to characterize the Cu/NHAp materials, and the effects of different parameters on the degradation kinetics were investigated and discussed.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2021)

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Article Chemistry, Multidisciplinary

Permanently polarized hydroxyapatite for selective electrothermal catalytic conversion of carbon dioxide into ethanol

Jordi Sans et al.

Summary: This study proposes the use of permanently polarized hydroxyapatite as a catalyst for the conversion of CO2 into ethanol, presenting a highly selective and green production method.

CHEMICAL COMMUNICATIONS (2021)

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Review Materials Science, Biomaterials

A review on hydroxyapatite coatings for the biomedical applications: experimental and theoretical perspectives

Shikha Awasthi et al.

Summary: The article presents the recent experimental and theoretical progress on HAP coatings, discussing their production methods, properties, and potential clinical applications.

JOURNAL OF MATERIALS CHEMISTRY B (2021)

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Article Chemistry, Multidisciplinary

Highly effective catalytic reduction of nitrobenzene compounds with gold nanoparticle-immobilized hydroxyapatite nanowire-sintered porous ceramic beads

Jie Li et al.

Summary: A nanogold-immobilized catalyst based on hydroxyapatite nanowire-sintered porous ceramic beads with excellent catalytic performance in the reductive degradation of nitrobenzene compounds has been prepared. The beads exhibit high catalytic activity and recyclability, maintaining high catalytic stability even after multiple high-temperature treatments.

NEW JOURNAL OF CHEMISTRY (2021)

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Review Engineering, Chemical

Application of hydroxyapatite and its modified forms as adsorbents for water defluoridation: an insight into process synthesis

Suja George et al.

REVIEWS IN CHEMICAL ENGINEERING (2020)

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Article Chemistry, Multidisciplinary

Biomimetic Mineralized Organic-Inorganic Hybrid Macrofiber with Spider Silk-Like Supertoughness

Yadong Yu et al.

ADVANCED FUNCTIONAL MATERIALS (2020)

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Article Chemistry, Multidisciplinary

Bioinspired Mineral-Organic Bone Adhesives for Stable Fracture Fixation and Accelerated Bone Regeneration

Shumeng Bai et al.

ADVANCED FUNCTIONAL MATERIALS (2020)

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Article Chemistry, Multidisciplinary

Nano Wave Plates Structuring and Index Matching in Transparent Hydroxyapatite-YAG: Ce Composite Ceramics for High Luminous Efficiency White Light-Emitting Diodes

Ping Huang et al.

ADVANCED MATERIALS (2020)

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Article Chemistry, Physical

Mn Supported on Ce Substituted Hydroxyapatite for VOC Oxidation: Catalytic Activity and Calcination Effect

R. K. More et al.

CATALYSIS LETTERS (2020)

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Review Multidisciplinary Sciences

Strategies in catalysts and electrolyzer design for electrochemical CO2 reduction toward C2+ products

Lei Fan et al.

SCIENCE ADVANCES (2020)

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Article Chemistry, Physical

Analysis of nitrogen fixation by a catalyst capable of transforming N2, CO2 and CH4 into amino acids under mild reactions conditions

Guillermo Revilla-Lopez et al.

APPLIED CATALYSIS A-GENERAL (2020)

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Article Chemistry, Physical

Electrocatalytic reduction of CO2 to ethylene and ethanol through hydrogen-assisted C-C coupling over fluorine-modified copper

Wenchao Ma et al.

NATURE CATALYSIS (2020)

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Article Engineering, Environmental

Rational design of highly H2O- and CO2-tolerant hydroxyapatite-supported Pd catalyst for low-temperature methane combustion

Yangyu Zhang et al.

CHEMICAL ENGINEERING JOURNAL (2020)

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Article Chemistry, Physical

Breaking-down the catalyst used for the electrophotosynthesis of amino acids by nitrogen and carbon fixation

Jordi Sans et al.

JOURNAL OF CATALYSIS (2020)

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Visible-light-driven amino acids production from biomass-based feedstocks over ultrathin CdS nanosheets

Song Song et al.

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Intermolecular channels direct crystal orientation in mineralized collagen

YiFei Xu et al.

NATURE COMMUNICATIONS (2020)

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Article Chemistry, Physical

High-Performance, Scalable, and Low-Cost Copper Hydroxyapatite for Photothermal CO2 Reduction

Jiuli Guo et al.

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Plasma-driven catalysis: green ammonia synthesis with intermittent electricity

Kevin H. R. Rouwenhorst et al.

GREEN CHEMISTRY (2020)

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Compositionally Screened Eutectic Catalytic Coatings on Halide Perovskite Photocathodes for Photoassisted Selective CO2 Reduction

Jie Chen et al.

ACS ENERGY LETTERS (2019)

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Cobalt Incorporated Hydroxyapatite Catalyst for Water Oxidation

Eunji Pyo et al.

CHEMCATCHEM (2019)

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A comprehensive review on electrical properties of hydroxyapatite based ceramic composites

Apurba Das et al.

MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS (2019)

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Nanocrystal/Metal-Organic Framework Hybrids as Electrocatalytic Platforms for CO2 Conversion

Yannick T. Guntern et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2019)

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Electrically Polarized Hydroxyapatite: Influence of the Polarization Process on the Microstructure and Properties

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Thermally Durable Lithium-Ion Capacitors with High Energy Density from All Hydroxyapatite Nanowire-Enabled Fire-Resistant Electrodes and Separators

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Colloidal Nanocrystals as Heterogeneous Catalysts for Electrochemical CO2 Conversions

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Nature Catalysis (2019)

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Design of atomically dispersed catalytic sites for photocatalytic CO2 reduction

Tong Xia et al.

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Ru/hydroxyapatite as a dual-functional catalyst for efficient transfer hydrogenolytic cleavage of aromatic ether bonds without additional bases

Manti Hua et al.

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Light-driven thermocatalytic CO2 reduction over surface-passivated -Mo2C nanowires: enhanced catalytic stability by light

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Hydroxyapatite with Permanent Electrical Polarization: Preparation, Characterization, and Response against Inorganic Adsorbates

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Sustainable synthesis of amino acids by catalytic fixation of molecular dinitrogen and carbon dioxide

Manuel Rivas et al.

GREEN CHEMISTRY (2018)

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Palladium Nanoparticles Supported on Hydroxyapatite Nanospheres: Highly Active, Reusable and Green Catalyst for Suzuki - Miyaura Cross Coupling Reactions under Aerobic Conditions

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