Hydroxyapatite supported Co3O4 catalyst for enhanced degradation of organic contaminants in aqueous solution: Synergistic visible-light photo-catalysis and sulfate radical oxidation process

Lv, Caizhi; Liang, Huimin; Chen, Hanjiao; Wu, Lan

doi:10.1016/j.microc.2019.05.059

Cited by 20 publications

(5 citation statements)

References 30 publications

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“…1,2 Recently, some metal HAs were prepared and used as eco-friendly catalysts in the photocatalytic system, 3 Fenton-like degradation, 4 and sulfate radical oxidative degradation. 5 Furthermore, HA nanowires (HAnWs) were paid more attention because of their better flexibility and specific surface area. Some HAnW-based functional materials, such as the salt-resistant Janus evaporator, 6 scaffold for the repairing cartilage defect, 7 cellulose fiber paper, 8 and magnetic paper for oil−water separation, 9 were reported.…”

Section: Introductionmentioning

confidence: 99%

“…Hydroxyapatite (HA), an important inorganic compounds (Ca 10 (PO 4 ) 6 (OH) 2 ), has been used in the environmental treatment field owing to its outstanding biocompatibility, ion exchange ability, and stability. , Recently, some metal HAs were prepared and used as eco-friendly catalysts in the photocatalytic system, Fenton-like degradation, and sulfate radical oxidative degradation . Furthermore, HA nanowires (HAnWs) were paid more attention because of their better flexibility and specific surface area.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Ren

et al. 2021

ACS Appl. Nano Mater.

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Hydroxyapatite (HA), as a kind of biocompatible inorganic material, is rich in hydroxyl groups on the surface and can easily undergo ion exchange reactions with metal ions. In this study, using HA nanowires (HAnW) as eco-friendly carriers and promoters, a HAnW-based heterojunction (HAnW@CoMOF), in which HA was coated by the cobalt-based metal−organic framework (Co-MOF), was synthesized by a simple in situ growth method and ion exchange method. Then, using HAnW@CoMOF to activate peroxymonosulfate, some typical organic pollutants including antibiotics and dyes, such as tetracycline (TC), malachite green, crystal violet, methylene blue, and rhodamine B, were excellently degraded. The removal rate of TC was 86% within 0.5 min and 97% within 15 min. It could also be reused for 10 times with the removal rate of TC being 95%. The catalytic mechanism was investigated with detecting reactive substances, including 1 O 2 ,• O 2 − • OH, and SO 4 −• . We considered the formation of Co−OH + in the heterojunction of HAnW@CoMOF, as there are a lot of −OH in HAnW, which fixed Co 2+ of Co-MOF. In summary, it provided an eco-friendly HA-based catalyst for effective and quick degradation of organic pollutants.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Ren

et al. 2021

ACS Appl. Nano Mater.

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“…Epoxidation reactions, oxidation of alcohols, Knoevenagel reaction, Michael addition, photocatalysis, and the hydrogen evolution reaction are just a few catalytic applications of nano-HAp. 1,[10][11][12][13][14][15] For the diverse applications of HAp, there is the need to always scale down the crystal size of HAp to the nanoscale. This is well-explained by the fact that materials that have smaller size (crystallite size) are more reactive and exhibit enhanced physicochemical properties due to the larger exposed surface area.…”

Section: àmentioning

confidence: 99%

A plant-mediated synthesis of nanostructured hydroxyapatite for biomedical applications: a review

2020

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“…Such inexpensive and environment-friendly apatitic calcium phosphate as hydroxyapatite (HA, Ca10(PO4)6(OH)2) and their non-stoichiometric and/or substituted counterparts can develop large surface areas and various morphologies, depending on their mode of preparation. HA (in its stoichiometric form) is not only stable in aqueous medium (typically above pH ~ 4.5) but also at high temperature [7][8][9] and can thus operate in large condition ranges, being of interest for both liquid medium (aqueous [10][11][12][13][14] or solvent free [15][16][17]) and gas phase reactions [18][19][20]. Moreover, it was reported to be stable over time on stream, resistant to sintering [18,[21][22][23] and to leaching [10,12,[24][25][26][27][28][29], and recyclable [11,17,23,[25][26][27][30][31][32][33][34][35][36][37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

“…HA (in its stoichiometric form) is not only stable in aqueous medium (typically above pH ~ 4.5) but also at high temperature [7][8][9] and can thus operate in large condition ranges, being of interest for both liquid medium (aqueous [10][11][12][13][14] or solvent free [15][16][17]) and gas phase reactions [18][19][20]. Moreover, it was reported to be stable over time on stream, resistant to sintering [18,[21][22][23] and to leaching [10,12,[24][25][26][27][28][29], and recyclable [11,17,23,[25][26][27][30][31][32][33][34][35][36][37][38][39][40]. Also, as mentioned above, several subtypes of apatitic compounds (stoichiometric or non-stoichiometric, nanocrystalline or not, substituted or not, surface-grafted or not) may be obtained depending on the mode of preparation, thus providing samples with different features of relevance to catalysis.…”

Section: Introductionmentioning

confidence: 99%

Structure and Surface Study of Hydroxyapatite‐Based Materials

Costentin

Drouet

Salles

et al. 2022

Design and Applications of Hydroxyapatite‐Based Catalysts

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In addition to designing catalytic materials ever more active and selective, the emergence of new classes of greener catalysts remains very challenging. The apatite family system with hydroxyapatite (HA) structure appears as a good candidate for catalysis due to its ecocompatibility properties, its sorption ability toward organic molecules, and its tunable composition resulting into modulation of its surface properties. Depending on their mode of preparation, these inexpensive and environment-friendly apatitic calcium phosphates exhibit properties of relevance to catalysis, such as large surface area and various morphologies.However, most studies focused so far on the catalytic performance of these compounds, while the study of structure-reactivity relationships required for rationalized optimization remains rather limited. This chapter aims at providing tools to help understand the catalytic behavior of apatite compounds, giving details about their structure, surface properties, and reactivity; this will include both stoichiometric and nonstoichiometric compounds, sometimes biomimetic and potentially substituted. A special attention is dedicated to recent advances in the characterization of their structural properties (bulk and surface/interphase) that have a strong impact on their reactivity, through both experimental and computational approaches to study the mechanisms occurring in the structure or at the crystals surface, as well as thermodynamic and dynamical properties. Remaining characterization challenges for apatite-based catalysts will also be discussed. 1.an influence on the charges carried by the cation and on the related strength of the Ca-O interaction [127], which results in different adsorption properties with guest molecules. To go further, quantum calculations coupled with NMR (Nuclear Magnetic Resonance) resultsshowed the impact of the presence of OHions on the migration of Ca 2+ as well as the rotation of PO4 3groups [128]. In the hydroxyapatite structure, phosphate ions PO4 3are the largest components of the structure. As such, they provide a primary backbone via 3D compact-like piling, generating interstitial sites for the other ions of the structure. Metal cations such as Ca 2+ occupy two types of crystallographic sites, denoted Ca1 (4 sites per unit formula) and Ca2 (6 sites per unit formula), see Figure 2. Ca1 sites are localized along the trigonal axis with the coordinates (1/4, 3/4, 1/2) and (3/4, 1/4, 1/2), forming linear columns along the c-axis. Ca2 sites in contrast form equilateral triangles at z = 1/4 and z = 3/4 on the sixfold screw (senary) 63 axes. Adjacent Ca1 and Ca2 sites are linked through shared oxygen atoms from PO4 tetrahedra. Ca1 sites generate (distorted) polyhedra where the metal ion is in ninefold coordination, while in Ca2 sites it is in sevenfold coordination.The Ca2 triangles contribute to delimit so-called "apatitic channels" where ions such as OHare axially located (Figure 3) [116,120]. In calcium hydroxyapatite, the Ca2 triangular sites correspond to the narrow...

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Hydroxyapatite supported Co3O4 catalyst for enhanced degradation of organic contaminants in aqueous solution: Synergistic visible-light photo-catalysis and sulfate radical oxidation process

Cited by 20 publications

References 30 publications

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

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

A plant-mediated synthesis of nanostructured hydroxyapatite for biomedical applications: a review

Structure and Surface Study of Hydroxyapatite‐Based Materials

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