Quantitative Examination of Aqueous Ferrocyanide Oxidation in a Carbon Nanotube Electrochemical Filter: Effects of Flow Rate, Ionic Strength, and Cathode Material

2013 ◽  
Vol 117 (6) ◽  
pp. 2855-2867 ◽  
Author(s):  
Mary H. Schnoor ◽  
Chad D. Vecitis
Keyword(s):  
Carbon Nanotube ◽  
Ionic Strength ◽  
Cathode Material ◽  
Flow Rate ◽  
Quantitative Examination ◽  
Filter Effects

scholarly journals Label-Free Immunodetection in High Ionic Strength Solutions Using Carbon Nanotube Transistors with Nanobody Receptors

Proceedings ◽  
2017 ◽  
Vol 1 (4) ◽  
pp. 491 ◽  
Author(s):  
Marcin S. Filipiak ◽  
Marcel Rother ◽  
Nesha M. Andoy ◽  
Arne C. Knudsen ◽  
Stefan B. Grimm ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Ionic Strength ◽  
High Ionic Strength ◽  
Label Free ◽  
Carbon Nanotube Transistors ◽  
Nanotube Transistors

scholarly journals Feedstock Diffusion and Decomposition in Aligned Carbon Nanotube Arrays

2009 ◽  
Author(s):  
Rong Xiang ◽  
Erik Einarsson ◽  
Junichiro Shiomi ◽  
Shigeo Maruyama
Keyword(s):  
Carbon Nanotube ◽  
Carbon Source ◽  
Flow Rate ◽  
Chemical Vapor ◽  
Mean Free Path ◽  
Diffusion Limit ◽  
Diffusion Resistance ◽  
Diffusion Controlled ◽  
Cnt Arrays ◽  
Growth Deceleration

Feedstock diffusion and decomposition in the root growth of aligned carbon nanotube (CNT) arrays is discussed. A non-dimensional modulus is proposed to differentiate catalyst-poisoning controlled growth deceleration from one which is diffusion controlled. It is found that, at current stage, aligned multi-walled carbon nanotube (MWNT) arrays are usually free of feedstock diffusion resistance. However, for single-walled carbon nanotube (SWNT) arrays, since the inter-tube distance is much smaller than the mean free path of carbon source (ethanol here), high diffusion resistance is significantly limiting the growth rate. The method presented here is also able to predict the critical lengths in different chemical vapor deposition (CVD) processes from which CNT arrays begin to meet this diffusion limit, as well as the possible solutions to this diffusion caused growth deceleration. The diffusion of carbon source inside of an array becomes more important when we found ethanol undergoes severe thermal decomposition at the reaction temperature. This means, in a typical alochol CVD, hydrocarbons and radicals decomposed from ethanol may collide and react with the outer walls of SWNTs before reaching catalyst particles. We found when flow rate is low and ethanol is thoroughly decomposed, the produced SWNTs contain more soot structures than the SWNTs obtained at higher ethanol flow rate. Understanding the mass transport and reaction inside a SWNT array is helpful to synthesize longer and cleaner SWNTs.

Na3.12Fe2.44(P2O7)2/multi-walled carbon nanotube composite as a cathode material for sodium-ion batteries

2015 ◽  
Vol 3 (33) ◽  
pp. 17224-17229 ◽  
Author(s):  
Yubin Niu ◽  
Maowen Xu ◽  
Chuanjun Cheng ◽  
ShuJuan Bao ◽  
Junke Hou ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Solid State ◽  
Cathode Material ◽  
Solid State Reaction ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Multi Walled Carbon Nanotube ◽  
Carbon Nanotube Composite

Na3.12Fe2.44(P2O7)2/multi-walled carbon nanotube (MWCNT) composite was fabricated by a solid state reaction and was further used to fabricate a cathode for sodium-ion batteries.

Defect-Rich Boron doped Carbon Nanotube as Electrocatalyst for Hybrid Li-air Battery

2021 ◽  
Author(s):  
Yuyang Wang ◽  
Mingfu Yu ◽  
Tianyu Zhang ◽  
Zhichao Xue ◽  
Ying Ma ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Oxygen Reduction Reaction ◽  
Cathode Material ◽  
Oxygen Reduction ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Reduction Reaction ◽  
Boron Doped ◽  
Air Battery

The carbon nanotube (CNT) as the cathode material for hybrid Li-air batteries(HLABs), its catalytic ability of oxygen reduction reaction (ORR), and oxygen evolution reaction (OER) are relatively limited. Herein, to...

scholarly journals Air sampling by pumping through a filter: effects of air flow rate, concentration, and decay of airborne substances

2016 ◽  
Vol 67 (4) ◽  
pp. 326-331
Author(s):  
Marko Šoštarić ◽  
Branko Petrinec ◽  
Dinko Babić
Keyword(s):  
Time Dependence ◽  
Flow Rate ◽  
Particle Concentration ◽  
Air Flow ◽  
Airborne Particles ◽  
Air Flow Rate ◽  
General Applicability ◽  
Compact Expression ◽  
Filter Effects ◽  
Over Time

Abstract This paper tackles the issue of interpreting the number of airborne particles adsorbed on a filter through which a certain volume of sampled air has been pumped. This number is equal to the product of the pumped volume and particle concentration in air, but only if the concentration is constant over time and if there is no substance decomposition on the filter during sampling. If this is not the case, one must take into account the inconstancy of the concentration and the decay law for a given substance, which is complicated even further if the flow rate through the filter is not constant. In this paper, we develop a formalism which considers all of these factors, resulting in a single, compact expression of general applicability. The use of this expression is exemplified by addressing a case of sampling airborne radioactive matter, where the decay law is already well known. This law is combined with three experimentally observed time dependence of the flow rate and two models for the time dependence of the particle concentration. We also discuss the implications of these calculations for certain other situations of interest to environmental studies.

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