scholarly journals Nitrogen and sulfur dual-doped high-surface-area hollow carbon nanospheres for efficient CO2 reduction

2020 ◽  
Vol 41 (5) ◽  
pp. 830-838 ◽  
Author(s):  
Guodong Li ◽  
Yongjie Qin ◽  
Yu Wu ◽  
Lei Pei ◽  
Qi Hu ◽  
...  
Keyword(s):  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Co2 Reduction ◽  
Carbon Nanospheres ◽  
Hollow Carbon

scholarly journals Facile synthesis of ultrahigh-surface-area hollow carbon nanospheres for enhanced adsorption and energy storage

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Fei Xu ◽  
Zhiwei Tang ◽  
Siqi Huang ◽  
Luyi Chen ◽  
Yeru Liang ◽  
...  
Keyword(s):  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Electrochemical Performances ◽  
Outer Diameter ◽  
Carbon Nanospheres ◽  
Nanoporous Carbons ◽  
Formidable Challenge ◽  
Enhanced Adsorption ◽  
Hollow Carbon

Abstract Exceptionally large surface area and well-defined nanostructure are both critical in the field of nanoporous carbons for challenging energy and environmental issues. The pursuit of ultrahigh surface area while maintaining definite nanostructure remains a formidable challenge because extensive creation of pores will undoubtedly give rise to the damage of nanostructures, especially below 100 nm. Here we report that high surface area of up to 3,022 m2 g−1 can be achieved for hollow carbon nanospheres with an outer diameter of 69 nm by a simple carbonization procedure with carefully selected carbon precursors and carbonization conditions. The tailor-made pore structure of hollow carbon nanospheres enables target-oriented applications, as exemplified by their enhanced adsorption capability towards organic vapours, and electrochemical performances as electrodes for supercapacitors and sulphur host materials for lithium–sulphur batteries. The facile approach may open the doors for preparation of highly porous carbons with desired nanostructure for numerous applications.

Double layer capacitance of high surface area carbon nanospheres derived from resorcinol–formaldehyde polymers

Carbon ◽  
2011 ◽  
Vol 49 (14) ◽  
pp. 4848-4857 ◽  
Author(s):  
Daisuke Tashima ◽  
Eri Yamamoto ◽  
Nanami Kai ◽  
Daisuke Fujikawa ◽  
Go Sakai ◽  
...  
Keyword(s):  
Surface Area ◽  
Double Layer ◽  
High Surface ◽  
High Surface Area ◽  
Double Layer Capacitance ◽  
Carbon Nanospheres ◽  
Resorcinol Formaldehyde

scholarly journals Utilization of carbon nanotube and graphene in electrochemical CO2 reduction

2020 ◽  
Vol 10 (4) ◽  
pp. 5815-5827
Keyword(s):  
Surface Area ◽  
Active Sites ◽  
High Surface ◽  
High Surface Area ◽  
Co2 Reduction ◽  
Value Added ◽  
Vital Role ◽  
Low Carbon ◽  
Support Materials ◽  
Electrochemical Co2 Reduction

The electrochemical reduction of carbon dioxide (ERCO2) driven by renewable energy to produce low-carbon fuels and value-added chemicals has been well known as a way capable of simultaneously solving energy exhaustion and global warming issue. Catalysts play a vital role in low temperature ERCO2, and those well used are single metals, metal oxides and alloys. Due to the characteristics of nanometer size, low resistance, high surface area, chemical stability, special mechanical and electronic properties, some novel carbon nomaterials (e.g. carbon nanotubes (CNTs) and graphene) show excellent properties in ERCO2 as catalysts or supports which can improve the electrochemical performance: activity, selectivity, and stability. Actually, they mostly act as support materials and little directly as catalysts. The specific surface area and the active sites of loaded catalysts can be increased, then the performance is significantly improved. In this work, we will make a review on the progress as to CNTs and graphene as catalysts and supports in ERCO2 in recent years and give the future prospects.

scholarly journals Carbon nanospheres as an electrode material for electroadsorption of Cu (II)

2019 ◽  
pp. 17-19
Author(s):  
Svetlana Kashina ◽  
Marco Balleza ◽  
Araceli Jacobo-Azuara ◽  
Rosario Galindo-González
Keyword(s):  
Surface Area ◽  
Electrode Material ◽  
Carbon Materials ◽  
Water Solution ◽  
High Surface ◽  
Sol Gel ◽  
High Surface Area ◽  
Carbon Nanospheres ◽  
Main Challenge ◽  
New Carbon Materials

Objectives. Contamination with heavy metals has augmented in last decades due to several factors. So, scientific community has a challenge to develop new and more efficient methods for contaminants removal. Electroadsorption is one of investigated techniques with promising results. The main challenge with this technique is determination of optimal parameters, such as electrode material, time and conditions of adsorption. Material for electrode for electroadsorption must fulfil some criteria: high electroactive area, low electrical resistance and environmental compatibility. For that reason, our research group decided to synthetize a set of new carbon materials with high surface area and features than make them interesting to test them as an electrode material. Methodology. 3 carbon materials were synthetized by sol-gel method using different time and temperature conditions. All materials were characterized by scanning electron microscopy and other techniques. FTO glasses were modified with synthetized materials separately. Electroadsorption of Cu (II) was conducted at room temperature. Contribution. In this work we demonstrate an easy synthesis of 3 carbonaceous materials with high surface area capable to remove Cu (II) from water solution by electroadsorption.

scholarly journals Magnetic hollow carbon microspheres as a reusable adsorbent for rhodamine B removal

RSC Advances ◽  
2017 ◽  
Vol 7 (38) ◽  
pp. 23255-23264 ◽  
Author(s):  
Feifei Lu ◽  
Ci Huang ◽  
Lijun You ◽  
Jiabing Wang ◽  
Qiqing Zhang
Keyword(s):  
Surface Area ◽  
Rhodamine B ◽  
High Surface ◽  
High Surface Area ◽  
Carbon Microspheres ◽  
Adsorption Performance ◽  
Hollow Carbon ◽  
Hollow Carbon Microspheres

Porous magnetic hollow carbon microspheres (MHCMs) were fabricated with a high surface area and superior adsorption performance for reusable RB removal.

Synthesis of High Surface Area Carbon Nanospheres with Wrinkled Cages and Their CO2 Capture Studies

2018 ◽  
Vol 3 (38) ◽  
pp. 10684-10688 ◽  
Author(s):  
Baljeet Singh ◽  
Ayan Maity ◽  
Vivek Polshettiwar
Keyword(s):  
Surface Area ◽  
Co2 Capture ◽  
High Surface ◽  
High Surface Area ◽  
Carbon Nanospheres

scholarly journals Green Synthesis of S- and N-Codoped Carbon Nanospheres and Application as Adsorbent of Pb (II) from Aqueous Solution

2020 ◽  
Vol 2020 ◽  
pp. 1-13 ◽  
Author(s):  
Nadia Hussain ◽  
Salam Alwan ◽  
Hassan Alshamsi ◽  
Ibrahim Sahib
Keyword(s):  
Electron Microscopy ◽  
Surface Area ◽  
Adsorption Process ◽  
High Surface ◽  
High Surface Area ◽  
Correlation Coefficients ◽  
Nitrogen Adsorption ◽  
Entropy Change ◽  
Standard Entropy ◽  
Carbon Nanospheres

In this paper, green and facile synthesis of sulfur- and nitrogen-codoped carbon nanospheres (CNs) was prepared from the extract of Hibiscus sabdariffa L by a direct hydrothermal method. Finally, sulfur-carbon nanospheres (CNs) were used as the adsorbent to remove Pb+2 ions from aqueous solutions because of the high surface area of S-CNs from CNs and N-CNs. The synthesized nanospheres were examined by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), field emission scanning electron microscopy, transmission electron microscopy (TEM), and nitrogen adsorption-desorption isotherms. The results show spherical shapes have a particle size of up to 65 nm with a high surface area capable of absorbing lead ions efficiently. Additionally, the factors affecting the process of adsorption that include equilibrium time, temperature, pH solution, ionic intensity, and adsorbent dose were studied. The equilibrium removal efficiency was studied employing Langmuir, Freundlich, and Temkin isotherm forms. The kinetic data were analyzed with two different kinetic models, and both apply to the adsorption process depending on the values of correlation coefficients. The thermodynamic parameters including Gibbs free energy (ΔG°), standard enthalpy change (ΔH°), and standard entropy change (ΔS°) were calculated for the adsorption process.

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