Effects of specific surface area of electrode and different electrolyte on capacitance properties in nano porous-structure CrN thin film electrode for supercapacitor

2021 ◽  
Author(s):  
Jing Shi ◽  
Bailing Jiang ◽  
Zheng Liu ◽  
Cong Li ◽  
Fangyuan Yan ◽  
...  
Keyword(s):  
Thin Film ◽  
Specific Surface ◽  
Porous Structure ◽  
Surface Area ◽  
Specific Surface Area ◽  
Film Electrode ◽  
Thin Film Electrode

scholarly journals High MB Solution Degradation Efficiency of FeSiBZr Amorphous Ribbon with Surface Tunnels

Materials ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 3694 ◽  
Author(s):  
Qi Chen ◽  
Zhicheng Yan ◽  
Hao Zhang ◽  
Lai-Chang Zhang ◽  
Haijian Ma ◽  
...  
Keyword(s):  
Specific Surface ◽  
Porous Structure ◽  
Surface Area ◽  
Free Volume ◽  
Specific Surface Area ◽  
Degradation Rate ◽  
High Efficiency ◽  
Amorphous Ribbon ◽  
Degradation Efficiency ◽  
Characteristic Distance

The as spun amorphous (Fe78Si9B13)99.5Zr0.5 (Zr0.5) and (Fe78Si9B13)99Zr1 (Zr1) ribbons having a Fenton-like reaction are proved to bear a good degradation performance in organic dye wastewater treatment for the first time by evaluating their degradation efficiency in methylene blue (MB) solution. Compared to the widely studied (Fe78Si9B13)100Zr0 (Zr0) amorphous ribbon for degradation, with increasing cZr (Zr atomic content), the as-spun Zr0, Zr0.5 and Zr1 amorphous ribbons have gradually increased degradation rate of MB solution. According to δc (characteristic distance) of as-spun Zr0, Zr0.5 and Zr1 ribbons, the free volume in Zr1 ribbon is higher Zr0 and Zr0.5 ribbons. In the reaction process, the Zr1 ribbon surface formed the 3D nano-porous structure with specific surface area higher than the cotton floc structure formed by Zr0 ribbon and coarse porous structure formed by Zr0.5 ribbon. The Zr1 ribbon’s high free volume and high specific surface area make its degradation rate of MB solution higher than that of Zr0 and Zr0.5 ribbons. This work not only provides a new method to remedying the organic dyes wastewater with high efficiency and low-cost, but also improves an application prospect of Fe-based glassy alloys.

Fabrication of an N-doped mesoporous bio-carbon electrocatalyst efficient in Zn–air batteries by an in situ gas-foaming strategy

2019 ◽  
Vol 55 (100) ◽  
pp. 15117-15120 ◽  
Author(s):  
Hong Wang ◽  
Wei Li ◽  
Zhiwei Zhu ◽  
Yijuan Wang ◽  
Pan Li ◽  
...  
Keyword(s):  
Specific Surface ◽  
Porous Structure ◽  
Surface Area ◽  
Specific Surface Area ◽  
Electrocatalytic Activity ◽  
High Specific Surface Area ◽  
Carbon Catalyst ◽  
Gas Foaming

An N-doped bio-carbon catalyst with a hierarchical interconnected macro/meso-porous structure and high specific surface area exhibited significantly enhanced electrocatalytic activity.

Effect of aging and alkali activator on the porous structure of a geopolymer

2014 ◽  
Vol 47 (1) ◽  
pp. 316-324 ◽  
Author(s):  
Prune Steins ◽  
Arnaud Poulesquen ◽  
Fabien Frizon ◽  
Olivier Diat ◽  
Jacques Jestin ◽  
...  
Keyword(s):  
Specific Surface ◽  
Porous Structure ◽  
Surface Area ◽  
Specific Surface Area ◽  
Pore Volume ◽  
Inorganic Polymers ◽  
Porous Network ◽  
X Ray ◽  
Alkali Activator ◽  
Effects Of Aging

Nitrogen sorption and small- and wide-angle X-ray and neutron scattering techniques were used to study the porous structure of geopolymers, inorganic polymers synthesized by reaction of a strongly alkaline solution and an aluminosilicate source (metakaolin). The effects of aging and the use of alkali activators (Na+, K+) of different sizes were investigated at room temperature. The influence of aging time on the microstructure of both geopolymer matrixes was verified in terms of pore volume and specific surface area. The results suggested a refinement of the porosity and therefore a reduction in the pore volume over time. Regardless of the age considered, some characteristics of the porous network such as pore size, shape and distribution depend on the alkali activator used. Whatever the technique considered, the potassium geopolymer has a greater specific surface area than the sodium geopolymer. According to the scattering results, the refinement of the porosity can be associated with, first, a densification of the solid network and, secondly, a partial closure of the porosity at the nanometre scale. The kinetics are much slower for the sodium geopolymer than for the potassium geopolymer in the six months of observation.

Micro/Nanostructured α-Fe2O3 with Structural Enhanced Removal Capacity of Cr(VI) Ions

2012 ◽  
Vol 518-523 ◽  
pp. 1753-1756 ◽  
Author(s):  
Gang Liu ◽  
Quan Deng ◽  
Yong Yang ◽  
Hui Min Wang ◽  
Guo Zhong Wang
Keyword(s):  
Specific Surface ◽  
Porous Structure ◽  
Surface Area ◽  
Specific Surface Area ◽  
Average Diameter ◽  
High Specific Surface Area ◽  
Removal Capacity

We have succeeded in preparing micro/nanostructured α-Fe2O3 spheres (MNFSs). The resulted MNFSs have an average diameter of about 5 µm, and are constructed by subunits of interlinked and elongated particles with a diameter of 20~60 nm. MNFSs show an obviously structural enhanced Cr(VI) removal capacity (5.88 mg/g) compared with nanoscaled (0.81 mg/g) and microscaled α-Fe2O3 (0.1 mg/g) due to its high specific surface area together with the special porous structure. Moreover, MNFSs show good availability of reusing to remove Cr(VI) ions.

Poly (Divinylbenzene) Particles of Large Specific Surface Area Prepared by Dispersion Polymerization

2010 ◽  
Vol 148-149 ◽  
pp. 1281-1285
Author(s):  
Yu Zeng Zhao ◽  
Yong Sheng Li ◽  
Hong Hua Ge ◽  
Qun Jie Xu
Keyword(s):  
Calcium Carbonate ◽  
Specific Surface ◽  
Porous Structure ◽  
Surface Area ◽  
Specific Surface Area ◽  
Dispersion Polymerization ◽  
Large Specific Surface Area

Porous polydivinylbenzene particles were prepared by dispersion polymerization, using AIBN as initiator, acetonitrile as solvent, calcium carbonate and polypyrrolidone used as dispersion stabilizer and porogen. Ratio of dispersion stabilizer with monomer affects the specific surface area and porous structure. Calcium carbonate and polypyrrolidone used porogen were studied.

The specific surface area and porous structure of graphite materials

2009 ◽  
Vol 83 (6) ◽  
pp. 1022-1025 ◽  
Author(s):  
O. N. Shornikova ◽  
E. V. Kogan ◽  
N. E. Sorokina ◽  
V. V. Avdeev
Keyword(s):  
Specific Surface ◽  
Porous Structure ◽  
Surface Area ◽  
Specific Surface Area

Bio-inspired bioactive glasses for efficient microRNA and drug delivery

2017 ◽  
Vol 5 (31) ◽  
pp. 6376-6384 ◽  
Author(s):  
Xian Li ◽  
Qiming Liang ◽  
Wen Zhang ◽  
Yuli Li ◽  
Jiandong Ye ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Specific Surface ◽  
Porous Structure ◽  
Surface Area ◽  
Specific Surface Area ◽  
Large Specific Surface Area ◽  
Bioactive Glasses ◽  
Efficient Delivery

Inspired by nature's pinecone structure, we innovatively designed and synthesized pinecone-like bioactive glasses for the delivery of microRNAs and drugs. The particles showed a large specific surface area, unique porous structure, and efficient delivery of microRNAs and doxorubicin.

ZnO Thin Film Prepared by Two-Step Electrodeposition Method for Dye-Sensitized Solar Cell

2014 ◽  
Vol 809-810 ◽  
pp. 665-671
Author(s):  
Xiao Ping Zou ◽  
Chuan Zhao ◽  
Cui Liu Wei
Keyword(s):  
Thin Film ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Conversion Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Zno Thin Film ◽  
Electrodeposition Method ◽  
Dye Sensitized ◽  
Dyes Adsorption

Mesoporous ZnO thin film is an important part of dye-sensitized solar cells (DSSCs) due to it determines the amount of adsorbed dyes. However, small specific surface area of ZnO thin film prepared by ordinary methods restricts the increase of conversion efficiency of DSSCs. In this work we adopted two-step electrodeposition method to fabricate ZnO thin film, which increase the roughness and dyes adsorption. ZnO nanosheets with many adsorbing nanoparticles were observed by scanning electron microscope (SEM). It is noteworthy that DSSC based on two-step electrodeposition method exhibit more outstanding photoelectric performance than those based on one-step electrodeposition method, which demonstrates that two-step electrodeposition method is in favor of increasing specific surface area and adding dyes adsorption, which eventually contributes to improvement the conversion efficiency of DSSCs.

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