Hierarchical ZIF-decorated nanoflower-covered 3-dimensional foam for enhanced catalytic reduction of nitrogen-containing contaminants

Lin, Jiang‐Jen; Lee, Jechan; Oh, Wen Da; Kwon, Eilhann E.; Tsai, Yu‐Chuan; Lisak, Grzegorz; Phattarapattamawong, Songkeart; Hu, Chechia; Lin, Kun‐Yi Andrew

doi:10.1016/j.jcis.2021.05.098

Cited by 21 publications

(14 citation statements)

References 44 publications

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“…The FT-IR and XPS results of the used catalyst (Figure B–D(a 3 )) are almost consistent with the NaBH 4 – -treated sample, which implies the negligible influence of substrate or product on the catalyst upon the far excessive NaBH 4 , revealing the reconstruction of the catalyst involving LDH restoration and reduction of Pd 2+ to Pd 0 species by the strong reductant in the reaction solution. The presence of Co 3+ in the used sample (∼42.07%) suggests that Co 2+ might act as an electron donor for reducing 4-NP, which is consistent with the weak catalytic reduction activity of the supported derived sample CoAl(O)/rGO-300 (2.38 × 10 –3 s –1 ). Thus, the high performance of the current catalysts is strongly related to the presence of Pd 0 species, the reducibility of Co 2+ species, and the synergistic interaction among Pd NCs, Co 2+ -OH (LDH), and rGO.…”

Section: Results and Discussionsupporting

confidence: 80%

“…The FT-IR spectrum of the treated sample (Figure 9B(a 2 )) shows a new peak at ∼672 cm −1 assigned to the Co 3+ −O, 63 implying the transition from Co 2+ to Co 3+ in the catalyst during the reaction. As expected, the Pd 3d XPS spectrum of the treated sample (Figure 9C(a 2 )) only shows the peaks assigned to Pd 0 , possibly due to the reduction function that occurred on the interface between the NaBH 4 solution and nanosheet array-like Co 2+ -contained catalyst 0.17 65 which is consistent with the weak catalytic reduction activity of the supported derived sample CoAl(O)/rGO-300 (2.38 × 10 −3 s −1 ). Thus, the high performance of the current catalysts is strongly related to the presence of Pd 0 species, the reducibility of Co 2+ species, and the synergistic interaction among Pd NCs, Co 2+ -OH (LDH), and rGO.…”

Section: Resultssupporting

confidence: 66%

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Hierarchical-Structured Pd Nanoclusters Catalysts x-PdNCs/CoAl(O)/rGO-T by the Captopril-Capped Pd Cluster Precursor Method for the Highly Efficient 4-Nitrophenol Reduction

Wang

Wei

et al. 2022

ACS Appl. Mater. Interfaces

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Water-soluble captopril-capped atomically precise Pd nanoclusters (Pd 17 Capt 8 NCs: 1.3 ± 0.5 nm) produced by a simple chemical reduction were supported on preprepared hybrid Co 3 Al-layered double hydroxide/reduced graphene oxide (Co 3 Al-LDH/rGO) by a pHadjusted electrostatic adsorption strategy followed by proper calcinations, giving a series of novel catalysts x-PdNCs/CoAl(O)/rGO-T (x (Pd loading) = 0.09, 0.17, 0.43 wt % (ICP), T = 230, 250, 280, 300, 320 °C). The characterization results show that the as-obtained catalysts possess the hierarchical nanosheet array morphology. Pd NCs with a size of ∼1.3 to 1.8 nm are highly distributed at the edge sites of the CoAl(O) nanosheets. All of the x-PdNCs/CoAl(O)/rGO-T catalysts show superior catalytic efficiency for the conversion of 4-nitrophenol to 4aminophenol, particularly 0.17-PdNCs/CoAl(O)/rGO-300 possesses the highest performance with a turnover frequency (TOF) of 30 042 h −1 , which is the highest among the reported Pd-based catalysts so far. The superior activity of 0.17-PdNCs/CoAl(O)/rGO-300 can be owing to ultrafine Pd NCs with a clean surface, the strongest PdNCs−Co 2+ -OH(LDH)−rGO three-phase synergy, and the much improved adsorption of the substrate via π−π stacking upon nanosheet array morphology. Meanwhile, 0.17-PdNCs/CoAl(O)/rGO-300 exhibits excellent catalytic activities for various nitroarenes and anionic azo dyes as well as good reusability with the complete reduction of 4-nitrophenol (4-NP) within 90 s after 10 successive runs. The present work provides not only a simple and convenient strategy for the synthesis of clean, efficient, and environmentally friendly supported metal nanocluster catalysts but also a new idea for the efficient catalytic degradation of environmental pollutants.

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Section: Results and Discussionsupporting

confidence: 80%

Section: Resultssupporting

confidence: 66%

Hierarchical-Structured Pd Nanoclusters Catalysts x-PdNCs/CoAl(O)/rGO-T by the Captopril-Capped Pd Cluster Precursor Method for the Highly Efficient 4-Nitrophenol Reduction

Wang

Wei

et al. 2022

ACS Appl. Mater. Interfaces

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“…Compared with the powder supports, the thin‐film supports (Scheme S1③) including the PAN‐Si membrane, 44 Cu foil, 45 PVDF membrane, 46 glass, 47 and cellulose paper, 48 and so on, are undoubtedly easier to recycle, but their lower specific surface area reduces the catalytically active sites of metal nanoparticles. Although the porous supports (Scheme S1④), for example, lignocellulose hydrogel, 49 Cu foam, 50 and TiO 2 scaffold 51 have higher active area than the thin‐film supports, most of their activity and stability are still far below expectations. Among the available supports, the Si nanowire array (Scheme S1⑤) is likely to be the best choice, due to the fact that it has all the advantages mentioned above, that is, high surface to volume ratio, strong metal‐support interactions, and easy to recycle, but drawback still exists regarding the costly, complicated, and low‐throughput preparation procedures 52 .…”

Section: Introductionmentioning

confidence: 99%

“…43 Compared with the powder supports, the thinfilm supports (Scheme S1③) including the PAN-Si membrane, 44 Cu foil, 45 PVDF membrane, 46 glass, 47 and cellulose paper, 48 and so on, are undoubtedly easier to recycle, but their lower specific surface area reduces the catalytically active sites of metal nanoparticles. Although the porous supports (Scheme S1④), for example, lignocellulose hydrogel, 49 Cu foam, 50 and TiO 2 scaffold 51 have higher active area than the thin-film supports, most of their activity and stability are still far below expectations.…”

mentioning

confidence: 99%

Ni nanoparticles‐loaded ZnO nanowire as an efficient and stable catalyst for reduction of 4‐nitrophenol

Lin

Luo

Zhou

et al. 2022

EcoMat

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An amorphous Ni nanoparticles-loaded ZnO nanowire array is controllably constructed on stainless steel mesh through combined electrodeposition and hydrothermal reaction. Its nano-arrayed structure not only provides a platform to achieve stable and good dispersion of Ni nanoparticles, but also helps improve their ability to adsorb 4-nitrophenolate ions and to capture hydrogen radicals, thereby accelerating the hydrogen transfer from metal hydride complex to 4-nitrophenol. Benefiting from the abovementioned unique features, it outperforms most Ni-based catalysts. While a 30-s re-electrodeposition of Ni can provide it extra 150 min of high catalytic activity towards the reduction of waste 4-nitrophenol to valuable 4-aminophenol, further demonstrating its outstanding reusability. The highly general methodology reported here paves the way to economically and effectively synthesize various other metal nanoparticles-loaded ZnO nanowire arrays on different conductive substrates, which not only enrich the nanowire-arrayed catalysts, but also significantly promote their practical utilizations in a wide range of environment-related fields.

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“…Differently, the transition metal Co can be expected to greatly modify the surface electronic structure of Cu species by forming electron-rich Cu species and the available Co 2+ /Co 3+ redox couple, , which may be extremely favorable to the electron transfer during the reaction upon much lower electronegativity of Co (1.88) than Cu (1.90) and stronger reducibility of the Co 2+ –OH (d 7 : t 2g 5 e g 2 ) group in alkaline media. Recently, several Cu–Co bimetallic catalysts with improved 4-NP reduction activity have been reported. ,, For example, Chu et al fabricated Cu/Co nanoparticles (15∼70 nm) doped with the N-containing carbon framework (NCF) through the bottle-around-a-ship method followed by high-temperature pyrolysis, exhibiting significantly improved 4-NP reduction catalytic activity than Co@NCF and Cu NPs, indicating the modifying effect of Co species.…”

Section: Introductionmentioning

confidence: 99%

Controllable Synthesis of Cobalt-Containing Nanosheet Array-Like Ternary CuCoAl-LDH/rGO Hybrids To Boost the Catalytic Efficiency for 4-Nitrophenol Reduction

Feng

Wei

Wang

et al. 2022

ACS Appl. Mater. Interfaces

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A series of Co-doped ternary CuxCo3– xAl-layered double hydroxide (LDH)/rGO nanosheet array hybrids (x = 0.5, 1.0, 1.5, and 2.0) were successfully prepared using the preconditioned pH value aqueous-phase coprecipitation strategy. The CuxCo3– xAl-LDH/rGO hybrids are featured as hexagonal CuCoAl-LDH nanosheets in situ anchoring onto both sides of the rGO surface in an ab-plane vertically interlaced growth pattern. The CuxCo3– xAl-LDH/rGO hybrids show excellent activity for the complete conversion of 4-nitrophenol to 4-aminophenol, especially Cu1.5Co1.5Al-LDH/rGO with the highest k app value of 49.2 × 10–3 s–1 and TOF of 232.8 h–1, clearly higher than most copper-containing samples in the literature and even some precious ones. Thermodynamic analysis was carried out, and the values of Ea, ΔH#, ΔS#, and ΔG# were estimated. The best activity of Cu1.5Co1.5Al-LDH/rGO can be mainly ascribed to the in situ-formed ultrafine Cu2O NPs (∼4.3 nm) along with a small amount of Cu0 species, the electron transfer effect induced by atomically dispersed Co2+ species leading to the formation of electron-rich Cu species along with the Co2+/Co3+ redox couple, the strong Cu2O-CuCoAl-LDH-rGO synergy upon the nanosheet array morphology with a high surface area and pore volume, and enhanced adsorption of reactants upon π–π stacking via an rGO layer. Meanwhile, the Cu1.5Co1.5Al-LDH/rGO exhibits an excellent universality and good cycling stability for 10 continuous runs. The Cu1.5Co1.5Al-LDH/rGO also shows superior efficiency in the catalytic reduction of 4-NP solution with a high concentration (20 mM) and displays excellent reduction performance in the fixed-bed test, implying the potential applications of the current Co-doped hierarchical ternary Cu-based LDH/rGO hybrids in the continuous treatment of practical wastewater.

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Hierarchical ZIF-decorated nanoflower-covered 3-dimensional foam for enhanced catalytic reduction of nitrogen-containing contaminants

Cited by 21 publications

References 44 publications

Hierarchical-Structured Pd Nanoclusters Catalysts x-PdNCs/CoAl(O)/rGO-T by the Captopril-Capped Pd Cluster Precursor Method for the Highly Efficient 4-Nitrophenol Reduction

Hierarchical-Structured Pd Nanoclusters Catalysts x-PdNCs/CoAl(O)/rGO-T by the Captopril-Capped Pd Cluster Precursor Method for the Highly Efficient 4-Nitrophenol Reduction

Ni nanoparticles‐loaded ZnO nanowire as an efficient and stable catalyst for reduction of 4‐nitrophenol

Controllable Synthesis of Cobalt-Containing Nanosheet Array-Like Ternary CuCoAl-LDH/rGO Hybrids To Boost the Catalytic Efficiency for 4-Nitrophenol Reduction

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