Lignin based synthesis of carbon nanocages assembled from graphitic layers with hierarchical pore structure

Qin, Hengfei; Kang, Shifei; Huang, Yongkui; Liu, Siyu; Yao, Fang; Xi, Li; Wang, Yangang

doi:10.1016/j.matlet.2015.06.002

Cited by 27 publications

(15 citation statements)

References 22 publications

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“…To elucidate the metallic phase nature of Pd particles, XRD and XPS have been further employed, as seen in Figure b–d. The XRD patterns exhibited two broad peaks at 26.4 and 44.6°, which could be assigned to the characteristic peaks of graphitic carbon. , Meanwhile, the characteristic XRD reflection peak of Pd (111) was also found at 40.0° for 0.25% Pd/ ms AC . It should be noticed that the existence of the peaks at 2θ = 26.35 and 44.63 in the XRD spectra of 0.25% Pd/ ms AC indicates that the deposition of Pd particles did not change the crystallographic behavior of the ms AC scaffold .…”

Section: Resultsmentioning

confidence: 91%

Selective Hydrogenation of Acetylene to Ethylene over the Surface of Sub-2 nm Pd Nanoparticles in Miscanthus sinensis-Derived Microporous Carbon Tubes

Guan

Zhang

et al. 2020

ACS Sustainable Chem. Eng.

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As one of the organic carbon-rich feedstocks, Miscanthus sinensis is an interesting candidate for producing many high-value materials and chemicals. In this study, M. sinensis -derived activated carbon (msAC) particles with ca. 3.4 nm average pore size have been prepared by a simple carbonation method for supporting Pd nanoparticles (NPs) to hydrogenate acetylene. Catalytic test results showed that the 0.25% Pd/msAC catalyst could convert ∼99.9% of acetylene with ∼99.9% of ethylene selectivity. The life test result strongly demonstrated that the catalyst had a good durability for long-term (>100 h) acetylene hydrogenation with high conversion (∼99.9%) and ethylene selectivity (∼93.1%) at 260 °C with a space velocity of 80,000 h–1. The characterization results indicated that the msAC with the micro- and nanoscale pore structure and uniformly distributed oxygen-containing functional groups could efficiently disperse Pd nanoparticles and promote their Pd (111) crystal plane exposure. The above structure nature was co-contributing to the catalyst to choose the energetically favorable path for efficient acetylene hydrogenation and ethylene desorption. This work opens up valuable insights into the high-value utilization of M. sinensis biomass to design an efficient isolated Pd NP catalyst.

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Section: Resultsmentioning

confidence: 91%

Selective Hydrogenation of Acetylene to Ethylene over the Surface of Sub-2 nm Pd Nanoparticles in Miscanthus sinensis-Derived Microporous Carbon Tubes

Guan

Zhang

et al. 2020

ACS Sustainable Chem. Eng.

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“…The N 2 adsorption isotherms of all the sample show a sharp increase in adsorption at low relative pressure ( P / P 0 ) range of 0.01–0.1, revealing their micro‐porous characteristics, as shown in Fig. 1 a [8]. With the increasing activation temperature from 750 to 800°C, the specific surface area, mesoporous specific surface area and pore volume rise from 2276.4 m 2 g −1 , 416.7 m 2 g −1 , 1.1 cm 3 g −1 to 3270.24 m 2 g −1 , 1730.7 m 2 g −1 1.8 cm 3 g −1 , respectively.…”

Section: Resultsmentioning

confidence: 99%

Non‐metallic printed circuit board waste derived carbon for the supercapacitor electrode material

Qin

Pan

Zhou

et al. 2020

Micro & Nano Letters

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Highly specific surface area carbon materials derived from the waste printed circuit board (WPCB) for supercapacitor electrode material are feasibly prepared via microwave carbonisation and KOH activation process with controlled activation temperature. The effect of activation temperature on the pore structure and the electrochemical performance of the products are studied. The results demonstrate that the appropriate pore structure plays an important role in the application of supercapacitor. The electrochemical performance tests show that the specific capacitance of WPCB-800 can reach 134.2 F g −1 at current density of 200 mA g −1 , and the capacity retention rate is 96.2% after 2000 cycles.

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“…In this work, due to the use of reducers (lignin-based oligomer and active carbon), metal cobalt was formed after the calcination process. In addition, the broad diffraction peaks located at 2θ around 26.1° are attributed to the graphitic carbon, , and the intensity of this graphitic peak becomes stronger with an increase in calcination temperature.…”

Section: Resultsmentioning

confidence: 99%

“…All the chemicals were used as received without further purification. The lignin-based oligomer precursors were prepared by using lignin and formaldehyde in a base-catalyzed process according to our own method . For a typical preparation, 7.0 g of lignin was added into 10.0 g of 5 wt % NaOH water solution under stirring at 40 °C.…”

Section: Methodsmentioning

confidence: 99%

Lignin-Based Fabrication of Co@C Core–Shell Nanoparticles as Efficient Catalyst for Selective Fischer–Tropsch Synthesis of C₅₊ Compounds

Qin

Kang

Wang

et al. 2016

ACS Sustainable Chem. Eng.

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Novel Co@C core–shell nanoparticles were prepared by a straightforward low-temperature carbonization process. The industrially available lignin was used as a low-cost biorenewable carbon source for the first time. The products were characterized by X-ray diffraction, energy-dispersive X-ray spectrometry, transmission electron microscopy, nitrogen adsorption–desorption, and Raman spectrum. The results showed that the synthesized Co@C catalysts had a well-defined core–shell structure with a moderate degree of graphitization, and the metal Co nanoparticles with the sizes of 20–150 nm were wrapped by several layers of graphitic carbon. This unique core–shell structure is useful in a Fischer–Tropsch reaction since it can provide high adsorption space and the graphite carbon layer defects are beneficial for H2 dissociative adsorption. Furthermore, the shell of graphitic carbon layers could restrict the aggregation of the cobalt nanoparticles during the activation and reaction processes. Fischer–Tropsch synthesis results showed that the Co@C core–shell catalysts had a high catalytic performance with the highest C5+ selectivity up to 56.8%, which is much higher compared with the traditional Co/AC catalyst (46.2%).

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Lignin based synthesis of carbon nanocages assembled from graphitic layers with hierarchical pore structure

Cited by 27 publications

References 22 publications

Selective Hydrogenation of Acetylene to Ethylene over the Surface of Sub-2 nm Pd Nanoparticles in Miscanthus sinensis-Derived Microporous Carbon Tubes

Selective Hydrogenation of Acetylene to Ethylene over the Surface of Sub-2 nm Pd Nanoparticles in Miscanthus sinensis-Derived Microporous Carbon Tubes

Non‐metallic printed circuit board waste derived carbon for the supercapacitor electrode material

Lignin-Based Fabrication of Co@C Core–Shell Nanoparticles as Efficient Catalyst for Selective Fischer–Tropsch Synthesis of C₅₊ Compounds

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Lignin based synthesis of carbon nanocages assembled from graphitic layers with hierarchical pore structure

Cited by 27 publications

References 22 publications

Selective Hydrogenation of Acetylene to Ethylene over the Surface of Sub-2 nm Pd Nanoparticles in Miscanthus sinensis-Derived Microporous Carbon Tubes

Selective Hydrogenation of Acetylene to Ethylene over the Surface of Sub-2 nm Pd Nanoparticles in Miscanthus sinensis-Derived Microporous Carbon Tubes

Non‐metallic printed circuit board waste derived carbon for the supercapacitor electrode material

Lignin-Based Fabrication of Co@C Core–Shell Nanoparticles as Efficient Catalyst for Selective Fischer–Tropsch Synthesis of C5+ Compounds

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Lignin-Based Fabrication of Co@C Core–Shell Nanoparticles as Efficient Catalyst for Selective Fischer–Tropsch Synthesis of C₅₊ Compounds