Boosting Deionization Capability by Effectively Improving Sodium-ion Storage Capacity Based on Robust Interfacial Electronic Interaction within 3D Na4Ti9O20/N-doped Porous Carbon Heterostructures

2021 ◽  
Author(s):  
Yingying Zhang ◽  
Kun Yang ◽  
Haibiao Yu ◽  
Weijun Shan ◽  
Zhenning Lou ◽  
...  
Keyword(s):  
Hydrothermal Reaction ◽  
High Surface ◽  
High Surface Area ◽  
Carbon Composite ◽  
Electronic Interaction ◽  
Capacitive Deionization ◽  
Ion Storage ◽  
Carbon Composite Materials ◽  
Sodium Ion Storage ◽  
Hydrothermal Reaction Time

A novel preparative approach for hopeful cathode materials of capacitive deionization (CDI) is proposed. Several 3D Na4Ti9O20/N-doped carbon composite materials (NTO/N-C-x, x represents hydrothermal reaction time) with high surface area...

Morphology dependent adsorption of methylene blue on trititanate nanoplates and nanotubes prepared by the hydrothermal treatment of TiO2

2016 ◽  
Vol 75 (2) ◽  
pp. 350-357
Author(s):  
Graham Dawson ◽  
Wei Chen ◽  
Luhua Lu ◽  
Kai Dai
Keyword(s):  
Methylene Blue ◽  
Adsorption Capacity ◽  
Surface Area ◽  
Pore Volume ◽  
Hydrothermal Reaction ◽  
Low Cost ◽  
High Surface ◽  
High Surface Area ◽  
High Capacity ◽  
Adsorption Properties

The adsorption properties of two nanomorphologies of trititanate, nanotubes (TiNT) and plates (TiNP), prepared by the hydrothermal reaction of concentrated NaOH with different phases of TiO2, were examined. It was found that the capacity for both morphologies towards methylene blue (MB), an ideal pollutant, was extremely high, with the TiNP having a capacity of 130 mg/g, higher than the TiNT, whose capacity was 120 mg/g at 10 mg/L MB concentration. At capacity, the well-dispersed powders deposit on the floor of the reaction vessel. The two morphologies had very different structural and adsorption properties. TiNT with high surface area and pore volume exhibited exothermic monolayer adsorption of MB. TiNP with low surface area and pore volume yielded a higher adsorption capacity through endothermic multilayer adsorption governed by pore diffusion. TiNP exhibited a higher negative surface charge of −23 mV, compared to −12 mV for TiNT. The adsorption process appears to be an electrostatic interaction, with the cationic dye attracted more strongly to the nanoplates, resulting in a higher adsorption capacity and different adsorption modes. We believe this simple, low cost production of high capacity nanostructured adsorbent material has potential uses in wastewater treatment.

Synthesis and Photocatalytic Properties of the Bi2MoO6 and Bi2WO6 Photocatalysts

2018 ◽  
Vol 768 ◽  
pp. 218-223
Author(s):  
Juan Xia ◽  
Lin Zhang ◽  
Qi Wang
Keyword(s):  
Light Absorption ◽  
Hydrothermal Reaction ◽  
Organic Dyes ◽  
High Surface ◽  
Diffuse Reflectance Spectrum ◽  
High Surface Area ◽  
Photocatalytic Properties ◽  
X Ray Diffraction ◽  
Electron Hole ◽  
One Pot

Two different Bi-based semiconductor photocatalysts Bi2MoO6 and Bi2WO6 were synthesized by a simple one-pot hydrothermal reaction at 453 K for 10 h. The properties of the photocatalysts, including structures, morphology, light-absorption band and photoluminescence, etc were characterized by X-ray diffraction, scanning electron microscopy, UV-Vis diffuse reflectance spectrum and fluorescence spectrum. Further, their photocatalytic properties were compared by the degradation of two different organic dyes: Rhodamine B and methylene blue. It is important to note that the Bi2WO6 nanoplate structure exhibited better photocatalytic activity than the Bi2MoO6 nanowires aggregates due to its high surface area, higher light absorption and lower recombination of electron-hole pairs.

scholarly journals Enhanced capacitive deionization performance by an rGO–SnO2 nanocomposite modified carbon felt electrode

RSC Advances ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 4182-4190 ◽  
Author(s):  
Syed Kamran Sami ◽  
Jung Yong Seo ◽  
Suh-Eun Hyeon ◽  
Md. Selim Arif Shershah ◽  
Pil-Jin Yoo ◽  
...  
Keyword(s):  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Capacitive Deionization ◽  
Carbon Felt ◽  
Nano Composite ◽  
Carbon Felt Electrode

The rGO–SnO2 nano-composite with a significantly high-surface-area, greatly improves the electrosorption capacity and is proposed as a novel electrode for capacitive deionization applications.

scholarly journals Removal of lead ions from water by capacitive deionization electrode materials derived from chicken feathers

2019 ◽  
Vol 9 (3) ◽  
pp. 282-291 ◽  
Author(s):  
T. Alfredy ◽  
Y. A. C. Jande ◽  
T. Pogrebnaya
Keyword(s):  
Electrode Materials ◽  
High Surface ◽  
High Surface Area ◽  
Koh Activation ◽  
Capacitive Deionization ◽  
Activation Temperature ◽  
Variable Parameters ◽  
Chicken Feathers ◽  
Bet Method ◽  
Removal Of Heavy Metals

Abstract Capacitive deionization (CDI) is a promising and rapidly growing technology for water treatment and the electrode materials play a key role in improving CDI performance. In this study, high surface area activated carbon was prepared from chicken feather (CF) bio-waste through pyrolysis and KOH activation; the KOH:CF ratio (R) and activation temperature (Ta) were variable parameters. The material was characterized by using the Brunauer, Emmett and Teller (BET) method, Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM). The lead (Pb2+) removal test was performed with a CDI cell containing the fabricated carbon electrode and 100 mg L−1 Pb(NO3)2 solution; the sample prepared with the ratio R of 1:1 and Ta = 800 °C exhibited higher Pb2+ removal efficiency of 81% and electro sorption capacity of 4.1 mg g−1 at the electrode potential 1.2 V and flow rate 5 mL min−1. Therefore, CF-derived carbon is considered as a promising CDI electrode material for removal of heavy metals from waste water.

A Study on the Electrochemical Properties of PEO-Carbon Composite Polymer Electrolytes for Lithium/Sulfur Battery

2007 ◽  
Vol 544-545 ◽  
pp. 945-948 ◽  
Author(s):  
Young Jin Choi ◽  
Sung Hyun Kim ◽  
Sang Choul Park ◽  
Dong Hyun Shin ◽  
Dong Hun Kim ◽  
...  
Keyword(s):  
High Surface ◽  
High Surface Area ◽  
Ionic Conductivities ◽  
Carbon Composite ◽  
Composite Polymer Electrolyte ◽  
Composite Polymer ◽  
Composite Polymer Electrolytes ◽  
Initial Discharge ◽  
Sulfur Battery ◽  
Discharge Capacities

In this study, we investigated ionic conductivities of the electrolytes and cycle performances of Li/S cells using the electrolyte. (PEO)10LiCF3SO3 composite polymer electrolyte(CPE) containing carbon powders and Brij dispersant was prepared by ball milling for 12hr. The 5wt% carbon powders having high surface area (~ 80 m2/g) was added into the (PEO)10LiCF3SO3 electrolyte. To get a well-dispersed structure, Brij dispersant was also added into the (PEO)10LiCF3SO3-5wt%Carbon electrolyte. Li/CPEs/50wt%S cells showed initial discharge capacities of between 1,250 and 1,413 mAh/g-sulfur with current density of 100 mA/g-sulfur at 80 °C. These results led us to conclude that the dispersants added into the CPE improved the initial discharge capacities and cycle performances.

scholarly journals Preparation of ZnO Nanorods/Graphene Composite Anodes for High-Performance Lithium-Ion Batteries

Nanomaterials ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 966 ◽  
Author(s):  
Junfan Zhang ◽  
Taizhe Tan ◽  
Yan Zhao ◽  
Ning Liu
Keyword(s):  
Lithium Ion Batteries ◽  
High Performance ◽  
Hydrothermal Reaction ◽  
High Surface ◽  
Zno Nanorods ◽  
High Surface Area ◽  
Three Dimensional ◽  
Lithium Ion ◽  
Practical Application ◽  
Composite Anodes

ZnO is a promising anode material for lithium-ion batteries (LIBs); however, its practical application is hindered primarily by its large volume variation upon lithiation. To overcome this drawback, we synthesized ZnO/graphene composites using the combination of a simple hydrothermal reaction and spray drying. These composites consisted of well-dispersed ZnO nanorods anchored to graphene. The folded three-dimensional graphene spheres provided a high conductivity, high surface area, and abundant defects. LIB with an anode composed of our novel ZnO/graphene material demonstrated a high initial discharge capacity of 1583 mAh g−1 at 200 mA g−1.

scholarly journals Carbon-Based Electric Double Layer Capacitors for Water Desalination

2010 ◽  
Author(s):  
Batya A. Fellman ◽  
Muataz Atieh ◽  
Evelyn N. Wang
Keyword(s):  
Electrode Materials ◽  
Salt Water ◽  
High Surface ◽  
High Surface Area ◽  
Water Desalination ◽  
Electrode Geometry ◽  
Capacitive Deionization ◽  
Water Stream ◽  
Carbon Based Nanomaterials ◽  
Carbon Based

In capacitive deionization (CDI), salt water is passed through two polarized electrodes, whereby the salt is adsorbed onto the electrode surface and removed from the water stream. This approach has received renewed interest for water desalination due to the development of new high-surface area carbon-based nanomaterials. However, there is currently limited understanding as to how electrode geometry, surface properties, and capacitance affect ion capture. In this work, we experimentally investigate various standard carbon-based electrode materials, including activated carbon and carbon cloths, as well as microfabricated silicon structures for CDI. Electrochemical characterization through cyclic voltammetry was used to determine the electrochemical properties of each material. In addition, a mini-channel test cell was fabricated to perform parametric studies on ion capture. By controlling electrode geometry and chemistry in these studies, the work helps elucidate transport mechanisms and provide insight into the design of optimal materials for capacitive deionization.

PRECURSORS-DECOMPOSITED SYNTHESIS AND VISIBLE-LIGHT-RESPONSE PHOTOCATALYSTIC PROPERTIES OF UNIFORM POROUS Bi2O3 NANOSPHERES

NANO ◽  
2014 ◽  
Vol 09 (06) ◽  
pp. 1450067 ◽  
Author(s):  
XIAOLI SUN ◽  
WEIDONG SHI ◽  
HAO TU ◽  
LEILEI XU ◽  
YAN YAN ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Visible Light ◽  
Narrow Band ◽  
Hydrothermal Reaction ◽  
High Surface ◽  
High Surface Area ◽  
Light Response ◽  
Sodium Cholate ◽  
Visible Light Response ◽  
Excellent Photocatalytic Activity

The Bi 2 O 3 sphere-like precursors were first synthesized through a simple hydrothermal reaction in the mixture of sodium cholate (SC) and hydrogen peroxide. Thermal decomposition of these precursors would result in the formation of the uniform porous Bi 2 O 3 nanospheres with diameters of ca. 80 nm in air at 500°C. The amount of added H 2 O 2 and the reaction time were found to play important roles in the formation of Bi 2 O 3 sphere-like precursors. The as-prepared porous Bi 2 O 3 nanospheres exhibited a very excellent photocatalytic activity for the degradation of rhodamine B (RB) and methyl blue (MB) dyes under visible-light irradiation, which could be attributed to their narrow band gap and high surface area.

scholarly journals Correction: High-surface-area mesoporous TiO2microspheres via one-step nanoparticle self-assembly for enhanced lithium-ion storage

Nanoscale ◽  
2015 ◽  
Vol 7 (48) ◽  
pp. 20777-20777
Author(s):  
Hsin-Yi Wang ◽  
Jiazang Chen ◽  
Sunny Hy ◽  
Linghui Yu ◽  
Zhichuan Xu ◽  
...  
Keyword(s):  
Surface Area ◽  
Self Assembly ◽  
High Surface ◽  
High Surface Area ◽  
Lithium Ion ◽  
Ion Storage ◽  
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