A novel catalyst of Ni hybridized with single-walled carbon nanohorns for converting methyl levulinate to γ-valerolactone

Termvidchakorn, Chompoopitch; Faungnawakij, Kajornsak; Kuboon, Sanchai; Butburee, Teera; Sano, Noriaki; Charinpanitkul, Tawatchai

doi:10.1016/j.apsusc.2018.04.054

Cited by 12 publications

(7 citation statements)

References 29 publications

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“…In addition, the productivity of GVL (mmol·g –1 metal ·h –1 ) over different catalysts was calculated according to the moles of produced GVL per unit mass of active metal species per time (Table S1). Notably, the productivity of GVL over NiCu-0.67 is higher than those of Cu-, Ni-, and Zr-based catalysts previously reported, ,,− despite different levulinates and alcohols employed as substrates, as well as different hydrogen sources and reaction conditions. The above results indicate the importance of the bimetallic NiCu NPs in catalysis and that the appropriate Cu/Ni ratio would be beneficial to the improvement of catalytic activity, reflecting the role of synergy between Ni–Cu species in the present NiFe- x catalyst system.…”

Section: Resultsmentioning

confidence: 69%

Hierarchical Flower-like Bimetallic NiCu catalysts for Catalytic Transfer Hydrogenation of Ethyl Levulinate into γ-Valerolactone

Liu

Fan

et al. 2019

Ind. Eng. Chem. Res.

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Due to fast exploitation and consumption of fossil resources, efficient transformation of renewable biomass would be of vital significance for the production of biofuels and value-added chemicals. Here, we developed new alumina microsphere (AMS) supported bimetallic NiCu catalysts with a hierarchical flower-like architecture for highly efficient catalytic transfer hydrogenation of biomass-derived ethyl levulinate (EL) to γ-valerolactone (GVL), which were derived from flower-like core–shell structured AMS@Ni–Cu–Al layered double hydroxide precursors (AMS@NiCuAl-LDH). Various characterizations demonstrated that the reduction of NiCuAl-LDH precursors in situ grown on the AMS could generate bimetallic NiCu alloy nanoparticles embedded into surface standing and intercrossed LDH-derived alumina nanoplatelets (ANPs), thereby forming a novel hierarchical multilevel AMS@NiCu@ANPs superstructure. As-fabricated bimetallic NiCu catalyst with 0.5 Cu/Ni molar ratio exhibited enhanced activity for catalytic transfer hydrogenation, in comparison with monometallic and other bimetallic ones, owing to the synergy between Ni–Cu species in highly dispersed bimetallic NiCu nanoparticles, i.e., the electronic effect, favorable surface acid–base property, and highly porous architecture. Moreover, the catalyst possessed good stability and recyclability, due to strong interactions between ANPs and AMS support, as well as between NiCu NPs and ANPs matrix.

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Section: Resultsmentioning

confidence: 69%

Hierarchical Flower-like Bimetallic NiCu catalysts for Catalytic Transfer Hydrogenation of Ethyl Levulinate into γ-Valerolactone

Liu

Fan

et al. 2019

Ind. Eng. Chem. Res.

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“…2,3 The characterization by transmission electron microscopy also revealed that these carbon nanomaterials form aggregates with an average diameter of 100 nm, known as Dahlia-like structure, which involves thousands of these individual carbon nanostructures. 4 Because of the high conductivity, high dispersibility, porosity, large inner surface area, and considerable reactivity associated with regions of higher curvature and tension, CNH have a number of nanotechnological applications 2 such as in supercapacitors, 5,6 electrodes for fuel cells, 7,8 catalytic supports, 9,10 biosensors, 11,12 and gas storage. 13,14 Moreover, the high purity due to the absence of metal catalysts in their synthesis associated with the low toxicity, biodegradation route, 15 and suitable diameters to accommodate clusters of drugs make these carbonaceous materials promising as drug delivery systems (DDS).…”

Section: Introductionmentioning

confidence: 99%

“…Because of the high conductivity, high dispersibility, porosity, large inner surface area, and considerable reactivity associated with regions of higher curvature and tension, CNH have a number of nanotechnological applications such as in supercapacitors, , electrodes for fuel cells, , catalytic supports, , biosensors, , and gas storage. , Moreover, the high purity due to the absence of metal catalysts in their synthesis associated with the low toxicity, biodegradation route, and suitable diameters to accommodate clusters of drugs make these carbonaceous materials promising as drug delivery systems (DDS) . In this context, a recent study conducted by He et al also demonstrated that CNH have an improved biocompatibility in relation to CNT, due to the lower interaction of the earlier ones with the glycoprotein nonmetastatic melanoma protein B, which is known to trigger the cascade toxicity that results in the cell death.…”

Section: Introductionmentioning

confidence: 99%

Chemically Modified Carbon Nanohorns as Nanovectors of the Cisplatin Drug: A Molecular Dynamics Study

Almeida

Souza

Almeida

et al. 2019

J. Chem. Inf. Model.

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Carbon nanohorns (CNH) have been considered potential anticancer drug carriers, such as the cisplatin drug (cddp), due to their low toxicity, high purity, drug-loading capacity, and biodegradation routes. However, when it comes to nanomedicine applications, chemical functionalization is an essential step in order to overcome undesirable properties of these nanomaterials, such as the high hydrophobicity, low reactivity, and low dispersibility in polar solvents. In this context, the present study involved the modeling of new CNH topologies based on chemical oxidation and reduction mechanisms and the investigation of the influence of these modified structures on the dynamics and stability of inclusion complexes with cddp. The results indicated that these functionalization strategies lead to the opening of nanowindows on the CNH surfaces, which would constitute the main route for drug release, as reported by experimentalists. Also, our results showed that the insertion of polar functional groups on the oxidized CNH (CNHox-N) contributed to an improvement of the cddp@CNHox-N biocompatibility due to the greater number of hydrogen bonds formed with the solvent. Despite the favorable formation of all complexes, the binding free energies pointed out that the oxidation process made the cddp@CNHox-N complexes slightly less stable than the ones with pristine and reduced CNH. Besides, the results suggest the possibility to tune the complex stability by controlling the oxidation degree, which could be explored by the experimentalists in order to design controlled drug delivery systems based on CNH nanocarriers.

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“…The first and second drastic weight losses at 200°C and 500°C were attributed to the decomposition of the O‐based functional groups and thermal‐oxidative decomposition of the graphene structure, respectively 51 . Meanwhile, the TGA curve of o ‐NH exhibited one major weight loss peak, at 600°C, resulting from the thermal‐oxidative decomposition of the NH structure 52 . The TGA curve of s ‐(GO/ o ‐NH) exhibited a thermal‐oxidative decomposition behavior similar to that of s ‐GO.…”

Section: Resultsmentioning

confidence: 99%

Ni‐Co layered double hydroxide coated on microsphere nanocomposite of graphene oxide and single‐walled carbon nanohorns as supercapacitor electrode material

Kim

Lee

et al. 2022

Intl J of Energy Research

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Summary Ni‐Co layered double hydroxides (LDH) have received considerable attention as excellent pseudocapacitor electrode materials. In this paper, a novel utilization of the composite of graphene oxide (GO) and single‐walled carbon nanohorns (SWCNHs) is reported as an effective substrate for LDH coatings. We successfully synthesized hierarchical nanostructures composed of Ni‐Co LDH as well as microsphere composites of GO and oxidized SWCNHs (o‐NH). A dense microsphere composite of GO and o‐NH was synthesized using the spray‐drying method (s‐(GO/o‐NH)). Subsequently, the prepared Ni‐Co LDH nanosheets were directly coated on the s‐(GO/o‐NH) microspheres using the hydrothermal method (LDH@s‐(GO/o‐NH)). Moreover, the electrochemical characteristics of the LDH@s‐(GO/o‐NH) supercapacitor electrodes were evaluated in a 6 M KOH electrolyte. In the three‐electrode system, the LDH@s‐(GO/o‐NH) composite electrode exhibited a significantly high gravimetric specific capacitance (1046 F g−1 at 1 mV s−1) and excellent specific capacitance retention (84% retention after 10 000 cycles at 100 mV s−1) compared with 211 F g−1 and 79% for the LDH@s‐GO composite electrode, respectively. The supercapacitive behavior of the LDH@s‐GO and LDH@s‐(GO/o‐NH) electrodes in the two‐electrode system exhibited a trend similar to that of the three‐electrode system. The superior electrochemical performance of the LDH@s‐(GO/o‐NH) composite electrode can be ascribed to its high electrical conductivity and pseudocapacitance, indicating that the s‐(GO/o‐NH) microsphere composite with an interconnected pore network structure can be utilized as a support for effectively coating Ni‐Co LDH components. The LDH@s‐(GO/o‐NH) composite electrode is a promising candidate for pseudocapacitor applications because of its excellent electrochemical characteristics and facile synthesis, making it suitable for industrial and consumer applications.

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A novel catalyst of Ni hybridized with single-walled carbon nanohorns for converting methyl levulinate to γ-valerolactone

Cited by 12 publications

References 29 publications

Hierarchical Flower-like Bimetallic NiCu catalysts for Catalytic Transfer Hydrogenation of Ethyl Levulinate into γ-Valerolactone

Hierarchical Flower-like Bimetallic NiCu catalysts for Catalytic Transfer Hydrogenation of Ethyl Levulinate into γ-Valerolactone

Chemically Modified Carbon Nanohorns as Nanovectors of the Cisplatin Drug: A Molecular Dynamics Study

Ni‐Co layered double hydroxide coated on microsphere nanocomposite of graphene oxide and single‐walled carbon nanohorns as supercapacitor electrode material

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