scholarly journals Ambient Pressure-Dried Graphene–Composite Carbon Aerogel for Capacitive Deionization

Processes ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 29 ◽  
Author(s):  
Chen Zhang ◽  
Xiaodong Wang ◽  
Hongqiang Wang ◽  
Xueling Wu ◽  
Jun Shen
Keyword(s):  
Photoelectron Spectroscopy ◽  
Ambient Pressure ◽  
Precursor Solution ◽  
Surface Characteristics ◽  
Carbon Aerogel ◽  
Ambient Pressure Drying ◽  
Carbon Aerogels ◽  
Capacitive Deionization ◽  
Graphene Composite ◽  
Composite Carbon

Capacitive deionization (CDI) technology possessing excellent desalination performance and energy efficiency is currently being widely studied in seawater desalination. In this work, the graphene–composite carbon aerogels (GCCAs) easily prepared by an ambient pressure drying method served as electrodes to remove salt ions in aqueous solution by CDI. The microstructure of the obtained GCCAs was found to depend on the component content in the precursor solution, and could be controlled through varying the mass ratio of resorcinol and formaldehyde to graphene oxide (RF/GO). The surface characteristics and microstructure of GCCAs were characterized by Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). In addition, the electrochemical tests and CDI experiments of GCCA electrodes were conducted in NaCl solution. Thanks to the reasonable pore structure and highly conductive network, GCCA-150 achieved the best salt adsorption capacity of 26.9 mg/g and 18.9 mg/g in NaCl solutions with concentrations of 500 mg/L and 250 mg/L, respectively.

Microporous carbon aerogel prepared through ambient pressure drying route as anode material for lithium ion cells

2017 ◽  
Vol 28 (12) ◽  
pp. 1945-1950 ◽  
Author(s):  
Ancy Smitha Alex ◽  
Ananda Lekshmi M.S. ◽  
Sekkar V. ◽  
Bibin John ◽  
Gouri C. ◽  
...  
Keyword(s):  
Anode Material ◽  
Ambient Pressure ◽  
Lithium Ion ◽  
Carbon Aerogel ◽  
Ambient Pressure Drying ◽  
Microporous Carbon ◽  
Lithium Ion Cells

scholarly journals X-ray Photoelectron Spectroscopy in Mineral Processing Studies

2020 ◽  
Vol 10 (15) ◽  
pp. 5138
Author(s):  
Yuri Mikhlin
Keyword(s):  
Spatial Resolution ◽  
Photoelectron Spectroscopy ◽  
Surface Characterization ◽  
Ambient Pressure ◽  
Surface Characteristics ◽  
Mineral Processing ◽  
Oxidation Products ◽  
X Ray ◽  
Flotation Collectors ◽  
Solid Liquid

Surface phenomena play the crucial role in the behavior of sulfide minerals in mineral processing of base and precious metal ores, including flotation, leaching, and environmental concerns. X-ray photoelectron spectroscopy (XPS) is the main experimental technique for surface characterization at present. However, there exist a number of problems related with complex composition of natural mineral systems, and instability of surface species and mineral/aqueous phase interfaces in the spectrometer vacuum. This overview describes contemporary XPS methods in terms of categorization and quantitative analysis of oxidation products, adsorbates and non-stoichiometric layers of sulfide phases, depth and lateral spatial resolution for minerals and ores under conditions related to mineral processing and hydrometallurgy. Specific practices allowing to preserve volatile species, e.g., elemental sulfur, polysulfide anions and flotation collectors, as well as solid/liquid interfaces are surveyed; in particular, the prospects of ambient pressure XPS and cryo-XPS of fast-frozen wet mineral pastes are discussed. It is also emphasized that further insights into the surface characteristics of individual minerals in technological slurries need new protocols of sample preparation in conjunction with high spatial resolution photoelectron spectroscopy that is still unavailable or unutilized in practice.

Optimized synthesis of carbon aerogels via ambient pressure drying process as electrode for supercapacitors

2015 ◽  
Vol 30 (6) ◽  
pp. 1325-1331 ◽  
Author(s):  
Lei Yuan ◽  
Lijuan Chang ◽  
Zhibing Fu ◽  
Xi Yang ◽  
Xingli Jiao ◽  
...  
Keyword(s):  
Ambient Pressure ◽  
Ambient Pressure Drying ◽  
Carbon Aerogels ◽  
Drying Process

scholarly journals Nitrogen-Doped Carbon Aerogels Derived from Starch Biomass with Improved Electrochemical Properties for Li-Ion Batteries

2021 ◽  
Vol 22 (18) ◽  
pp. 9918
Author(s):  
Marcelina Kubicka ◽  
Monika Bakierska ◽  
Krystian Chudzik ◽  
Michał Świętosławski ◽  
Marcin Molenda
Keyword(s):  
Electrochemical Properties ◽  
Photoelectron Spectroscopy ◽  
Electrochemical Impedance ◽  
Potato Starch ◽  
Specific Capacity ◽  
Carbon Aerogel ◽  
Carbon Aerogels ◽  
Modern World ◽  
X Ray ◽  
Li Ion

Among all advanced anode materials, graphite is regarded as leading and still-unrivaled. However, in the modern world, graphite-based anodes cannot fully satisfy the customers because of its insufficient value of specific capacity. Other limitations are being nonrenewable, restricted natural graphite resources, or harsh conditions required for artificial graphite production. All things considered, many efforts have been made in the investigation of novel carbonaceous materials with desired properties produced from natural, renewable resources via facile, low-cost, and environmentally friendly methods. In this work, we obtained N-doped, starch-based carbon aerogels using melamine and N2 pyrolysis as the source of nitrogen. The materials were characterized by X-ray powder diffraction, elemental analysis, X-ray photoelectron spectroscopy, galvanostatic charge–discharge tests, cyclic voltammetry, and electrochemical impedance spectroscopy. Depending on the doping method and the nitrogen amount, synthesized samples achieved different electrochemical behavior. N-doped, bioderived carbons exhibit far better electrochemical properties in comparison with pristine ones. Materials with the optimal amount of nitrogen (such as MCAGPS-N8.0%—carbon aerogel made from potato starch modified with melamine and CAGPS-N1.2%—carbon aerogel made from potato starch modified by N2 pyrolysis) are also competitive to graphite, especially for high-performance battery applications. N-doping can enhance the efficiency of Li-ion cells mostly by inducing more defects in the carbon matrix, improving the binding ability of Li+ and charge-transfer process.

scholarly journals Capacitive deionization of NaCl solutions with ambient pressure dried carbon aerogel microsphere electrodes

RSC Advances ◽  
2017 ◽  
Vol 7 (57) ◽  
pp. 35875-35882 ◽  
Author(s):  
Xueping Quan ◽  
Zhibing Fu ◽  
Lei Yuan ◽  
Minglong Zhong ◽  
Rui Mi ◽  
...  
Keyword(s):  
Emulsion Polymerization ◽  
Electrode Material ◽  
Ambient Pressure ◽  
Carbon Aerogel ◽  
Capacitive Deionization ◽  
Ambient Drying ◽  
Drying Techniques

We first used carbon aerogel microspheres prepared via emulsion polymerization and ambient drying techniques as electrode material for capacitive deionization.

Preparation of carbon aerogel by ambient pressure drying and its application in lithium/sulfur battery

2012 ◽  
Vol 43 (1) ◽  
pp. 65-72 ◽  
Author(s):  
Longyan Li ◽  
Xiaodong Guo ◽  
Benhe Zhong ◽  
Yanxiao Chen ◽  
Lan Li ◽  
...  
Keyword(s):  
Ambient Pressure ◽  
Carbon Aerogel ◽  
Ambient Pressure Drying ◽  
Lithium Sulfur Battery ◽  
Sulfur Battery ◽  
Lithium Sulfur

scholarly journals Strong and machinable carbon aerogel monoliths with low thermal conductivity prepared via ambient pressure drying

Carbon ◽  
2016 ◽  
Vol 108 ◽  
pp. 551-560 ◽  
Author(s):  
Xianfeng Jia ◽  
Bowen Dai ◽  
Zhaoxian Zhu ◽  
Jitong Wang ◽  
Wenming Qiao ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Ambient Pressure ◽  
Carbon Aerogel ◽  
Ambient Pressure Drying ◽  
Low Thermal Conductivity
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