Hierarchical flower-like Ni–Co layered double hydroxide nanostructures: synthesis and super performance

2018 ◽  
Vol 5 (12) ◽  
pp. 3033-3041 ◽  
Author(s):  
Tao Dong ◽  
Xiao Zhang ◽  
Meng Li ◽  
Peng Wang ◽  
Ping Yang
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Layered Double Hydroxide ◽  
Specific Surface Area ◽  
Three Dimensional ◽  
Interlayer Spacing ◽  
Large Specific Surface Area ◽  
Anionic Dyes ◽  
Double Hydroxide

Three-dimensional hierarchical flower-like Ni–Co LDHs have been prepared with a large specific surface area and expanded interlayer spacing as an adsorbent for removing anionic dyes and as an electrode for supercapacitors.

Three-dimensional graphene encapsulated hollow CoSe2-SnSe2 nanoboxes for high performance asymmetric supercapacitors

2022 ◽  
Author(s):  
Kainan Li ◽  
Ke Zheng ◽  
Zhifang Zhang ◽  
Kuan Li ◽  
Ziyao Bian ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Active Sites ◽  
Specific Capacity ◽  
Three Dimensional ◽  
Hollow Structure ◽  
Large Specific Surface Area ◽  
Composite Aerogel

Abstract Construction of metal selenides with a large specific surface area and a hollow structure is one of the effective methods to improve the electrochemical performance of supercapacitors. However, the nano-material easily agglomerates due to the lack of support, resulting in the loss of electrochemical performance. Herein, we successfully design a three-dimensional graphene (3DG) encapsulation-protected hollow nanoboxes (CoSe2-SnSe2) composite aerogel (3DG/CoSe2-SnSe2) via a co-precipitation method coupled with self-assembly route, followed by a high temperature selenidation strategy. The obtained aerogel possesses porous 3DG conductive network, large specific surface area and plenty of reactive active sites. It could be used as a flexible and binder-free electrode after a facile mechanical compression process, which provided a high specific capacitance of 460 F g-1 at 0.5 A g-1, good rate capability of 212.7 F g-1 at 10 A g-1, and excellent cycle stability due to the fast electron/ion transfer and electrolyte diffusion. With the as-prepared 3DG/CoSe2-SnSe2 as positive electrodes and the AC (activated carbon) as negative electrodes, an asymmetric supercapacitor (3DG/CoSe2-SnSe2//AC) was fabricated, which delivered a high specific capacity of 38 F g-1 at 1A g-1 and an energy density of 11.89 W h kg-1 at 749.9 W kg-1, as well as a capacitance retention of 91.1% after 3000 cycles. This work provides a new method for preparing electrode material.

scholarly journals Mesostructuring layered materials: self-supported mesoporous layered double hydroxide nanotubes

Nanoscale ◽  
2021 ◽  
Author(s):  
Alysson Ferreira Morais ◽  
Dimy Nanclares ◽  
Ivan Guide Nunes da Silva ◽  
Alfredo Duarte ◽  
Fernando Assis Garcia ◽  
...  
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Layered Double Hydroxide ◽  
Specific Surface Area ◽  
Functional Materials ◽  
Layered Materials ◽  
High Specific Surface Area ◽  
Hierarchical Porosity ◽  
Soft Templating ◽  
Double Hydroxide

Synthesis of layered materials exhibiting hierarchical porosity remains challenging, but nevertheless worthwhile because it turns such solids into functional materials with high specific surface area. Using a soft-templating strategy in...

Synthesis of high-specific-surface-area Li-Al mixed metal oxide: Through nanoseed-assisted growth of layered double hydroxide

2021 ◽  
Vol 203 ◽  
pp. 106006
Author(s):  
Masanori Takemoto ◽  
Yasuaki Tokudome ◽  
Hidenobu Murata ◽  
Kenji Okada ◽  
Masahide Takahashi ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Specific Surface ◽  
Surface Area ◽  
Layered Double Hydroxide ◽  
Specific Surface Area ◽  
High Specific Surface Area ◽  
Mixed Metal Oxide ◽  
Mixed Metal ◽  
Double Hydroxide

scholarly journals Mixed Metal Oxide by Calcination of Layered Double Hydroxide: Parameters Affecting Specific Surface Area

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1153
Author(s):  
Su-Bin Lee ◽  
Eun-Hye Ko ◽  
Joo Y. Park ◽  
Jae-Min Oh
Keyword(s):  
Metal Oxide ◽  
Specific Surface ◽  
Surface Area ◽  
Calcination Temperature ◽  
Layered Double Hydroxide ◽  
Specific Surface Area ◽  
High Performance ◽  
Mixed Metal Oxide ◽  
Mixed Metal ◽  
Double Hydroxide

Mixed metal oxide (MMO) is one of the widely utilized ceramic materials in various industries. In order to obtain high performance, the specific surface area of MMO should be controlled. Calcination of layered double hydroxide (LDH) is a versatile way to prepare MMO with homogeneous metal distribution and well-developed porosity. Although researchers found that the specific surface area of LDH-originated MMO was relatively high, it had not been systematically investigated how the surface area is controlled under a certain parameter. In this review, we summarized LDH-originated MMO with various starting composition, calcination temperature, and pore developing agent in terms of specific surface area and porosity. Briefly, it was represented that MMOs with Mg-Al components generally had higher specific surface area than Mg-Fe or Zn-Al components. Calcination temperature in the range 300–600 °C resulted in the high specific surface area, while upper or lower temperature reduced the values. Pore developing agent did not result in dramatic increase in MMO; however, the pore size distribution became narrower in the presence of pore developing agents.

scholarly journals A three-dimensional porous MoS2–PVP aerogel as a highly efficient and recyclable sorbent for oils and organic solvents

2020 ◽  
Vol 1 (4) ◽  
pp. 760-766 ◽  
Author(s):  
Pin Song ◽  
Jun Di ◽  
Haiping Chen ◽  
Sirui Zhao ◽  
Cao Wu ◽  
...  
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Three Dimensional ◽  
Low Density ◽  
High Porosity ◽  
Large Specific Surface Area ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water

Three-dimensional (3D) aerogels have attracted more and more attention in oil–water separation, due to their advantages of low density, high porosity, and large specific surface area.

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