Three-dimensional porous boron nitride with enriched defects and free radicals enables high photocatalytic activity for hydrogen evolution

Chen, Yang; Bu, Donglei; Huang, Shaoming

doi:10.1016/j.cej.2022.137026

Cited by 21 publications

(8 citation statements)

References 57 publications

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“…[26] Figure 3f shows the HRTEM image where the measured lattice spacing (0.331 nm) can be indexed to the (002) crystalline surface of h-BN. [39,40] Apart from that, there are no other lattice stripes, indicating that La 2 O 3 exists in an amorphous state on the BNÀ La-4 surface, which is consistent with the XRD results. Moreover, the elemental distribution mappings (Figure 3g-l) can show that B, N, O, C and La are uniformly distributed on BNÀ La-4, further confirming the successful loading of La 2 O 3 .…”

Section: Characterization Of Adsorbentssupporting

confidence: 87%

La₂O₃ modified porous boron nitride for enhanced adsorption and removal of fluoride pollutants from an aqueous solution

Gu,

Fang,

Cai

et al. 2023

ChemistrySelect

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Fluorine contamination has caused great harm to humans and the environment. In this study, novel lanthanum modified porous boron nitride (porous BN) composites (BN−La−X) were successfully prepared and applied to remove fluoride from water. The results indicated that lanthanum was present on the surface of BN in the form of amorphous La2O3. BN−La‐4 has excellent adsorption performance, and its removal of fluoride is much more effective than that of porous BN with good cyclic regeneration ability. In addition, the fluoride adsorption by BN−La‐4 could reach adsorption equilibrium within 2 h and the adsorption kinetics was conformed to the pseudo‐second‐order model. The maximum adsorption capacity of BN−La‐4 was calculated from the Langmuir model to be 80.04 mg g−1, which was better than most related adsorbents. Furthermore, the presence of anions and pH values affected the removal of fluoride. The adsorption mechanisms were consisted of electrostatic attraction, ion exchange between hydroxyl and fluorine ions, and the formation of coordination complexes between lanthanide ions and fluoride ions. In summary, La2O3 modified porous boron nitride composite is a promising adsorbent for the removal of fluoride contamination in aquatic environment.

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Section: Characterization Of Adsorbentssupporting

confidence: 87%

La₂O₃ modified porous boron nitride for enhanced adsorption and removal of fluoride pollutants from an aqueous solution

Gu,

Fang,

Cai

et al. 2023

ChemistrySelect

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show abstract

“…Consequently, it can be inferred that the valence band potentials ( E VB ) for GDY and CoAl 2 O 4 were 1.15 V and 0.45 V versus NHE, as determined using the formula: E VB = E g + E CB . 47 Finally, the detailed band structures for GDY and CoAl 2 O 4 are illustrated in Fig. 8f.…”

Section: Resultsmentioning

confidence: 99%

“…45,46 Utilizing the formula E NHE = E CB + 0.241 V, the specic E CB positions for GDY and CoAl 2 O 4 were −0.64 V and −1.24 V versus the normal hydrogen electrode (NHE). Consequently, it can be inferred that the valence band potentials (E VB ) for GDY and CoAl 2 O 4 were 1.15 V and 0.45 V versus NHE, as determined using the formula: 47 Finally, the detailed band structures for GDY and CoAl 2 O 4 are illustrated in Fig. 8f.…”

Section: Optical Properties and Electronic Structuresmentioning

confidence: 97%

Engineering of a hierarchical S-scheme 2D/3D heterojunction with graphdiyne (g-C_nH_2n−2) coated 3D porous CoAl₂O₄ nanoflowers for highly efficient photocatalytic H₂ evolution

Hao,

Deng,

Fan

et al. 2024

J. Mater. Chem. A

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“…It is stable under extreme physical and chemical conditions and is suitable for industrial applications . In particular, the sp B–N bond is conducive to stabilizing nanocomponents. , Thus, h-BN has been extensively employed in the design of heterogeneous catalysts. Moreover, it is of great significance to explore the catalysts supported by h-BN.…”

Section: Introductionmentioning

confidence: 99%

Highly Dispersed Ru Nanoclusters Anchored on Hexagonal Boron Nitride for Efficient and Stable Hydrogenation of Aromatic Amines to Alicyclic Amines

Han

Wang

Cao

et al. 2023

Ind. Eng. Chem. Res.

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Saturated hydrogenation of aromatic amines is a crucial methodology for synthesizing alicyclic amines. The dispersion of Ru atoms occurred after chemical reduction treatment, which was constrained to B and N coordination, further promoting the Ru species’ uniform distribution through interaction with the B–N bond of boron nitride. Moreover, the Ru coordinated with h-BN and further formed the stable catalytic active center. By virtue of its excellent stability, the hydrogenation of MDA executed in the fixed-bed reactor could run for more than 200 h. However, the density functional theory showed that the hydrogenation rate of the second benzene ring was comparatively slower because of the strong intermediate adsorption during the conversion from 4,4′-diaminodiphenylmethane to 4,4′-diaminodicyclohexylmethane. Furthermore, Ru/h-BN exhibited excellent performance in the hydrogenation of other aromatic amines, resulting in corresponding alicyclic amines. Therefore, this research offers a stable and effective catalyst for the green hydrogenation of aromatic amines leading to the production of alicyclic amines.

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Three-dimensional porous boron nitride with enriched defects and free radicals enables high photocatalytic activity for hydrogen evolution

Cited by 21 publications

References 57 publications

La₂O₃ modified porous boron nitride for enhanced adsorption and removal of fluoride pollutants from an aqueous solution

La₂O₃ modified porous boron nitride for enhanced adsorption and removal of fluoride pollutants from an aqueous solution

Engineering of a hierarchical S-scheme 2D/3D heterojunction with graphdiyne (g-C_nH_2n−2) coated 3D porous CoAl₂O₄ nanoflowers for highly efficient photocatalytic H₂ evolution

Highly Dispersed Ru Nanoclusters Anchored on Hexagonal Boron Nitride for Efficient and Stable Hydrogenation of Aromatic Amines to Alicyclic Amines

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Three-dimensional porous boron nitride with enriched defects and free radicals enables high photocatalytic activity for hydrogen evolution

Cited by 21 publications

References 57 publications

La2O3 modified porous boron nitride for enhanced adsorption and removal of fluoride pollutants from an aqueous solution

La2O3 modified porous boron nitride for enhanced adsorption and removal of fluoride pollutants from an aqueous solution

Engineering of a hierarchical S-scheme 2D/3D heterojunction with graphdiyne (g-CnH2n−2) coated 3D porous CoAl2O4 nanoflowers for highly efficient photocatalytic H2 evolution

Highly Dispersed Ru Nanoclusters Anchored on Hexagonal Boron Nitride for Efficient and Stable Hydrogenation of Aromatic Amines to Alicyclic Amines

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Product

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La₂O₃ modified porous boron nitride for enhanced adsorption and removal of fluoride pollutants from an aqueous solution

La₂O₃ modified porous boron nitride for enhanced adsorption and removal of fluoride pollutants from an aqueous solution

Engineering of a hierarchical S-scheme 2D/3D heterojunction with graphdiyne (g-C_nH_2n−2) coated 3D porous CoAl₂O₄ nanoflowers for highly efficient photocatalytic H₂ evolution