scholarly journals Porous Material Prepared by Carbonizing Montmorillonite/Acriflavine Complex and Control of Porous Structure by Freeze-Drying

1987 ◽  
Vol 95 (1108) ◽  
pp. 1164-1168 ◽  
Author(s):  
Asao OYA ◽  
Jun SAKANO ◽  
Sugio OTANI
Keyword(s):  
Porous Material ◽  
Porous Structure ◽  
Freeze Drying ◽  
And Control

Construction of a CsPbBr3 modified porous g-C3N4 photocatalyst for effective reduction of CO2 and mechanism exploration

2021 ◽  
Author(s):  
Yunqi Wang ◽  
Zhixiang Liu ◽  
Xu Tang ◽  
Pengwei Huo ◽  
Zhi Zhu ◽  
...  
Keyword(s):  
High Temperature ◽  
Porous Structure ◽  
Freeze Drying ◽  
Drying Method ◽  
Full Spectrum ◽  
Effective Reduction ◽  
Reduction Of Co2 ◽  
High Temperature Calcination

A P-CN/CsPbBr3 photocatalyst with a lamellar porous structure was prepared by a high temperature calcination and freeze drying method, and it exhibited superior CO2 reduction performance under the conditions of full spectrum irradiation.

scholarly journals Flexible free-standing graphene paper with interconnected porous structure for energy storage

2015 ◽  
Vol 3 (8) ◽  
pp. 4428-4434 ◽  
Author(s):  
Kewei Shu ◽  
Caiyun Wang ◽  
Sha Li ◽  
Chen Zhao ◽  
Yang Yang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Solid State ◽  
Porous Structure ◽  
Freeze Drying ◽  
Lithium Battery ◽  
Drying Method ◽  
Free Standing ◽  
Electrode Performance ◽  
Porous Graphene ◽  
Graphene Paper

Flexible porous graphene paper was obtained via facile freeze drying method. It exhibits an excellent electrode performance in both the lithium battery and solid-state supercapacitor.

Geometrical Model for Permeable Material’s Porous Structure

2019 ◽  
Vol 7 (2) ◽  
pp. 42-54 ◽  
Author(s):  
А. Синцов ◽  
A. Sintsov ◽  
Владимир Девисилов ◽  
Vladimir Devisilov
Keyword(s):  
Porous Material ◽  
Porous Structure ◽  
Cross Section ◽  
Structural Characteristics ◽  
Variable Cross Section ◽  
Geometrical Model ◽  
Variable Cross ◽  
Experimental Stand ◽  
Experimental Technology

In this paper have been presented a new model of the porous structure, as well as an analysis of possibilities of a new method for experimental investigation of porous permeable materials and determination of their structural characteristics. An analysis for the majority of used in analytical calculations geometric models for a porous medium has been presented, and a model for a porous material in the form of porous matrix’s elementary cells has been proposed. Each of the cells contains a capillary channel with a variable cross-section. Volumetric structural characteristics, as well as dependencies of surface structural characteristics over the porous matrix’s thickness, are identical to these parameters, which have been obtained during the experimental study of a porous material. As a result of use of an original experimental technology offered by authors, and of experiment processing the porous matrix’s structure can be completely defined. The problem of creating an experimental setup, allowing determine the porous matrix’s characteristics, has been formulated. One of possible options for the experimental stand has been considered.

In-Line Optimization and Control of an Industrial Freeze-Drying Process for Pharmaceuticals

2010 ◽  
Vol 99 (11) ◽  
pp. 4691-4709 ◽  
Author(s):  
Roberto Pisano ◽  
Davide Fissore ◽  
Salvatore A. Velardi ◽  
Antonello A. Barresi
Keyword(s):  
Freeze Drying ◽  
Drying Process ◽  
Optimization And Control ◽  
And Control

scholarly journals Substantiation of the parameters of vibration systems in the cab of the gantry crane at the workplace of crane operators

2018 ◽  
Vol 226 ◽  
pp. 01023 ◽  
Author(s):  
Kirill O. Kobzev ◽  
Sergey A. Shamshura ◽  
Alexander N. Chukarin ◽  
Alexey I. Buryanov ◽  
Valeriy E. Kasyanov
Keyword(s):  
Porous Material ◽  
Porous Structure ◽  
Gantry Crane ◽  
Vibration Absorption ◽  
Frictional Losses ◽  
Vibration Wave

Reduction of vibration in the cabin can be achieved by increasing the area of vibration absorption by placing on the ceiling and floor vibro-absorbing facings. The process of absorption of vibration occurs due to the transition of the energy of oscillating particles to heat due to frictional losses in the pores of the material; therefore, for effective vibration absorption, the material must have a porous structure, the pores must be open from the side of the vibration and join together (unclosed pores) so as not to prevent the penetration of the vibration wave into the thickness of the material. As a vibration-absorbing cladding, we use a construction in the form of a layer of a homogeneous porous material of a certain thickness, reinforced directly on the surface of the fence.

Sonication-Assisted Synthesis of Molybdenum Disulfide Aerogel for the Electrode Materials of Supercapacitors

NANO ◽  
2019 ◽  
Vol 14 (05) ◽  
pp. 1950055
Author(s):  
Qiang Zhang ◽  
Wenyuan He ◽  
Yinmin Wang ◽  
Dazhao Pei ◽  
Xuejun Zheng
Keyword(s):  
Specific Surface ◽  
Porous Structure ◽  
Molybdenum Disulfide ◽  
Freeze Drying ◽  
Electrode Materials ◽  
Hydrothermal Reaction ◽  
High Specific Capacitance ◽  
Electrochemical Performances ◽  
Surface Areas ◽  
Charge Discharge

The sonication processing was added in front of the freeze-drying as an intermediate processing before the molybdenum disulfide (MoS2) aerogel was synthesized. It is distinguishing with the traditional hydrothermal reaction to combine the sonication processing and freeze-drying in our method. The structure, morphology, specific surface area and pore size distribution were characterized, and the electrochemical performances were measured in 0.5[Formula: see text]M Na2SO4 electrolyte for the MoS2 aerogel and flower-like MoS2. As for comparison, they are of porous structure and microsphere structure, and their specific surface areas are 55.14[Formula: see text]m2[Formula: see text]g[Formula: see text] and 38.12[Formula: see text]m2[Formula: see text]g[Formula: see text]. The specific capacitances are 166.7[Formula: see text]F[Formula: see text]g[Formula: see text] and 119.2[Formula: see text]F[Formula: see text]g[Formula: see text] at the scan rate of 5[Formula: see text]mV[Formula: see text]s[Formula: see text], and the capacity retentions are 87.7% and 81.6% after 3000 charge/discharge cycles. For the enhanced mechanism, the high specific surface of the MoS2 aerogel causes high specific capacitance, and the unique porous structure could buffer volume expansion to improve retention ability during charge/discharge processes. The MoS2 aerogel may thus be a promising electrode material for supercapacitors.

Evaluation of Thermal Stability of Porous Material by Sintering Stress

2006 ◽  
Vol 317-318 ◽  
pp. 683-688
Author(s):  
Fumihiro Wakai ◽  
Yutaka Shinoda ◽  
Takashi Akatsu
Keyword(s):  
Thermal Stability ◽  
Porous Material ◽  
Porous Structure ◽  
Porous Materials ◽  
Difference Method ◽  
Energy Difference ◽  
Force Balance ◽  
Pore Surface ◽  
Porous Structures ◽  
Thermal Stability Of

The sintering stress is related to the thermal stability of porous structure. The sintering stress for a given porous structure in equilibrium can be calculated by three methods theoretically; the energy difference method, the curvature method, and the force balance method. The sintering stresses by three different methods were exactly the same for the idealized porous materials in equilibrium, in which the pore surface had a constant curvature at any point. The porous material does not spontaneously shrink when the sintering stress becomes zero or negative. The sintering stress will be used to design optimal porous structures with improved thermal stability.

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