Ultrathin CoFe-layered double hydroxide nanosheets embedded in high conductance Cu3N nanowire arrays with a 3D core–shell architecture for ultrahigh capacitance supercapacitors

2018 ◽  
Vol 6 (47) ◽  
pp. 24603-24613 ◽  
Author(s):  
Xing Zhou ◽  
Xiaohui Li ◽  
Dejian Chen ◽  
Danyang Zhao ◽  
Xintang Huang
Keyword(s):  
Energy Storage ◽  
Specific Surface ◽  
Surface Area ◽  
Layered Double Hydroxide ◽  
Electrode Material ◽  
Nanowire Arrays ◽  
Core Shell ◽  
Promising Candidate ◽  
Double Hydroxide ◽  
High Conductance

Ultrathin layered double hydroxide (LDH) nanosheets are a promising candidate as the electrode material for energy storage due to the ultrafast mass diffusion and greater specific surface area.

scholarly journals Towards the Continuous Hydrothermal Synthesis of ZnO@Mg2Al-CO3 Core-Shell Composite Nanomaterials

Nanomaterials ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 2052
Author(s):  
Ian Clark ◽  
Jacob Smith ◽  
Rachel L. Gomes ◽  
Edward Lester
Keyword(s):  
Composite Material ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Single Phase ◽  
Core Shell ◽  
Composite Nanomaterials ◽  
One Step ◽  
Double Hydroxide ◽  
Shell Composite

Core-shell Zinc Oxide/Layered Double Hydroxide (ZnO@LDH) composite nanomaterials have been produced by a one-step continuous hydrothermal synthesis process, in an attempt to further enhance the application potential of layered double hydroxide (LDH) nanomaterials. The synthesis involves two hydrothermal reactors in series with the first producing a ZnO core and the second producing the Mg2Al-CO3 shell. Crystal domain length of single phase ZnO and composite ZnO was 25 nm and 42 nm, respectively. The ZnO@LDH composite had a specific surface area of 76 m2 g−1, which was larger than ZnO or Mg2Al-CO3 when produced separately (53 m2 g−1 and 58 m2 g−1, respectively). The increased specific surface area is attributed to the structural arrangement of the Mg2Al-CO3 in the composite. Platelets are envisaged to nucleate on the core and grow outwards, thus reducing the face–face stacking that occurs in conventional Mg2Al-CO3 synthesis. The Mg/Al ratio in the single phase LDH was close to the theoretical ratio of 2, but the Mg/Al ratio in the composite was 1.27 due to the formation of Zn2Al-CO3 LDH from residual Zn2+ ions. NaOH concentration was also found to influence Mg/Al ratio, with lower NaOH resulting in a lower Mg/Al ratio. NaOH concentration also affected morphology and specific surface area, with reduced NaOH content in the second reaction stage causing a dramatic increase in specific surface area (> 250 m2 g−1). The formation of a core-shell composite material was achieved through continuous synthesis; however, the final product was not entirely ZnO@Mg2Al-CO3. The product contained a mixture of ZnO, Mg2Al-CO3, Zn2Al-CO3, and the composite material. Whilst further optimisation is required in order to remove other crystalline impurities from the synthesis, this research acts as a stepping stone towards the formation of composite materials via a one-step continuous synthesis.

Ultrathin mesoporous F-doped α-Ni(OH)2 nanosheets as an efficient electrode material for water splitting and supercapacitors

2019 ◽  
Vol 7 (16) ◽  
pp. 9656-9664 ◽  
Author(s):  
Nadeem Hussain ◽  
Wenjuan Yang ◽  
Jianmin Dou ◽  
Yanan Chen ◽  
Yitai Qian ◽  
...  
Keyword(s):  
Energy Storage ◽  
Specific Surface ◽  
Surface Area ◽  
Water Splitting ◽  
Specific Surface Area ◽  
Electrode Material ◽  
Storage Systems ◽  
High Specific Surface Area ◽  
Two Dimensional ◽  
2D Nanomaterials

Two-dimensional (2D) nanomaterials with a high specific surface area and mesoporous nature are attractive and have wide applications in catalysis, energy storage systems, etc.

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

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.

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.

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