Potassium citrate assisted synthesis of hierarchical porous carbon materials for high performance supercapacitors

Zheng, Jiaojiao; Yan, Bing; Li, Feng; Zhang, Qian; Zhang, Chunmei; Yang, Weisen; Han, Jingquan; Jiang, Shaohua; He, Shuijian

doi:10.1016/j.diamond.2022.109247

Cited by 67 publications

(34 citation statements)

References 69 publications

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“…The photoelectric performances of the newly fabricated NM@NiCoP electrode are comparable or even superior to other metal networks/mesh electrodes manufactured with other technologies reported in previous literature. [24][25][26][27] To demonstrate the optimal ratio of Ni to Co and successful construction of NM@NiCoP electrode, NM@NiCoP-x-y electrodes with different atomic ratios are prepared, and systematic material characterization is also performed. The samples with Ni to Co atomic ratios (x : y) of 1 : 0, 1 : 3, 1 : 1, 3 : 1, 0 : 1 are noted as NM@NiCoP-1-0, NM@NiCoP-1-3, NM@NiCoP, NM@NiCoP-3-1, NM@NiCoP-0-1, respectively.…”

Section: Resultsmentioning

confidence: 99%

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Freestanding ultralight metallic micromesh for high-energy density flexible transparent supercapacitors

Zhang

Zhao

et al. 2022

J. Mater. Chem. A

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Freestanding ultralight metallic micromesh for high-energy density flexible transparent supercapacitors

Zhang

Zhao

et al. 2022

J. Mater. Chem. A

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“…Figure 7 presents the Nyquist plot of the PIM and MM-PIM samples at different MWCNT loads. Ideally, a Nyquist plot forms a semicircular line that describes a parallel linkage of a capacitor (static polymer chain) and a resistor (active ions inside polymer matrix) [ 62 , 63 ].…”

Section: Resultsmentioning

confidence: 99%

Fabrication and Characterisation of MWCNT/Polyvinyl (PVC) Polymer Inclusion Membrane for Zinc (II) Ion Removal from Aqueous Solution

et al. 2022

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Heavy metal pollution has prompted researchers to establish the most effective method to tackle the impacts of heavy metals on living things and the environment, which include by applying nanoparticles. An example is the employment of multi-walled carbon nanotubes (MWCNTs) as an additive in an intermediate membrane or polymer inclusion membrane (PIM). The MWCNTs were added to enhance the properties and reinforce the transport performance of zinc (II) ion (Zn2+) removal from the source phase to the receiver phase by the PIMs. The present study constructed a membrane with a poly(vinyl chloride) (PVC)-based polymer, dioctyl phthalate (DOP) plasticiser, and bis-(2-ethylhexyl) phosphate (B2EHP) carrier incorporated with different concentrations of MWCNTs. The contact angle (CA), water uptake, ion exchange capacity (IEC), and porosity of the fabricated membranes were evaluated. The membrane was also characterised by employing scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), and electrochemical impedance spectroscopy (EIS). Subsequently, the fabricated PIM (W1) and mixed matrix (MM)-PIM (W2–W5) samples were assessed under different parameters to acquire the ideal membrane composition and effectiveness. Kinetic modelling of Zn2+ removal by the fabricated PIMs under similar conditions was performed to reveal the mechanisms involved. The average removal efficiency of the membranes was >99% at different parameter conditions. Nevertheless, the W3 membrane with 1.0 wt% MWCNT immersed in a 5 mg/L initial Zn2+ concentration and 1.0 M receiver solution for seven hours at pH 2 demonstrated the highest percentage of Zn2+ removal. The experimental data were best fitted to the pseudo-first-order kinetic model (PFO) in kinetic modelling, and the permeability and flux of the W3 at optimum conditions were 0.053 m s−1 and 0.0532 mol m−2 s−1, respectively. In conclusion, the transport mechanism of Zn2+ was enhanced with the addition of the MWCNTs.

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“…The G band is an intrinsic Raman-active band for the ideal graphite structure and corresponds to the E 2g vibration due to the C-C stretching in the longitudinal symmetry axis of the graphite plane. This band represents a high degree of graphitization [ 131 ].…”

Section: Resultsmentioning

confidence: 99%

Physical-Chemical Characterization of Different Carbon-Based Sorbents for Environmental Applications

et al. 2022

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Biochar has been used in various applications, e.g., as a soil conditioner and in remediation of contaminated water, wastewater, and gaseous emissions. In the latter application, biochar was shown to be a suitable alternative to activated carbon, providing high treatment efficiency. Since biochar is a by-product of waste pyrolysis, its use allows for compliance with circular economics. Thus, this research aims to obtain a detailed characterization of three carbonaceous materials: an activated carbon (CARBOSORB NC 1240®) and two biochars (RE-CHAR® and AMBIOTON®). In particular, the objective of this work is to compare the properties of three carbonaceous materials to evaluate whether the application of the two biochars is the same as that of activated carbon. The characterization included, among others, particle size distribution, elemental analysis, pH, scanning electron microscope, pore volume, specific surface area, and ionic exchange capacity. The results showed that CARBOSORB NC 1240® presented a higher specific surface (1126.64 m2/g) than AMBIOTON® (256.23 m2/g) and RE-CHAR® (280.25 m2/g). Both biochar and activated carbon belong to the category of mesoporous media, showing a pore size between 2 and 50 nm (20–500 Å). Moreover, the chemical composition analysis shows similar C, H, and N composition in the three carbonaceous materials while a higher O composition in RE-CHAR® (9.9%) than in CARBOSORB NC 1240 ® (2.67%) and AMBIOTON® (1.10%). Differences in physical and chemical properties are determined by the feedstock and pyrolysis or gasification temperature. The results obtained allowed to compare the selected materials among each other and with other carbonaceous adsorbents.

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Potassium citrate assisted synthesis of hierarchical porous carbon materials for high performance supercapacitors

Cited by 67 publications

References 69 publications

Freestanding ultralight metallic micromesh for high-energy density flexible transparent supercapacitors

Freestanding ultralight metallic micromesh for high-energy density flexible transparent supercapacitors

Fabrication and Characterisation of MWCNT/Polyvinyl (PVC) Polymer Inclusion Membrane for Zinc (II) Ion Removal from Aqueous Solution

Physical-Chemical Characterization of Different Carbon-Based Sorbents for Environmental Applications

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