Preparation and electrochemical performance of nitrogen-enriched carbon based on melamine formaldehyde resin/graphene oxide composites

2015 ◽  
Vol 44 (4) ◽  
pp. 205-213 ◽  
Author(s):  
Jiahuan Du ◽  
Qiang Li ◽  
Chuanli Qin ◽  
Xugang Zhang ◽  
Zheng Jin ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Nitrogen Content ◽  
Specific Capacitance ◽  
Negative Electrode ◽  
High Conductivity ◽  
Formaldehyde Resin ◽  
High Nitrogen Content ◽  
Melamine Formaldehyde ◽  
High Nitrogen ◽  
Content Type

Purpose – The purpose of this paper is to develop nitrogen-enriched carbon (NC) with high conductivity and specific capacitance as electrode materials for supercapacitors. Design/methodology/approach – Graphene oxide (GO) was synthesized by the modified Hummers–Offeman method. NC was synthesized by carbonization of melamine formaldehyde resin/graphene oxide (MF/GO) composites. Supercapacitors based on Ni(OH)2/Co(OH)2 composites as the positive electrode and NC as the negative electrode were assembled. The electrochemical performances of NC and supercapacitors are studied. Findings – The results show that obtained NC has high nitrogen content. Compared to NC-GO0 without GO, high conductivity and specific capacitance were obtained for NC with GO due to the introduction of layered GO. The presence of pseudocapacitive interactions between potassium cations and the nitrogen atoms of NC was also proposed. When the weight ratio of GO to MF is 0.013:1, the obtained NC-GO3 has the highest specific capacitance of 154.07 F/g due to GO and its highest content of N-6. When the P of the asymmetric supercapacitor with NC-GO3 as the negative electrode is 1,326.70 W/kg, its Cps and Ep are still 23.84 F/g and 8.48 Wh/Kg, respectively. There is only 4.4 per cent decay in Cps of the supercapacitor over 1,000 cycles. Research limitations/implications – NC is a suitable electrode material for supercapacitors. The supercapacitors can be used in the field of automobiles and can solve the problems of energy shortage and environmental pollutions. Originality/value – NC based on MF/GO composites with high nitrogen content and conductivity was novel and its electrochemical properties were excellent.

The influence of urea on composition, microstructure and electrochemical properties of nitrogen-enriched carbon based on polyvinylpyrrolidone/melamine formaldehyde resin

2015 ◽  
Vol 44 (5) ◽  
pp. 257-265 ◽  
Author(s):  
Qiang Li ◽  
Jiahuan Du ◽  
Xugang Zhang ◽  
Chuanli Qin ◽  
Zheng Jin ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Electrode Material ◽  
Nitrogen Concentration ◽  
Negative Electrode ◽  
Formaldehyde Resin ◽  
Melamine Formaldehyde ◽  
High Nitrogen ◽  
Content Type ◽  
Melamine Formaldehyde Resin ◽  
High Nitrogen Concentration

Purpose – The purpose of this paper is to develop porous nitrogen-enriched carbon (NC-U) with high nitrogen concentration and high specific capacitance (Cpe) as the electrode material for supercapacitors. Design/methodology/approach – NC-U was obtained by carbonization of polyvinylpyrrolidone/melamine formaldehyde resin (PVP/MF) with different contents of urea. In comparison, NC-K was also prepared by the KOH activation method. A series of asymmetric supercapacitors with NC as a negative electrode was assembled. The composition, microstructure and electrochemical properties of NC and their supercapacitors were studied. Findings – The results show that NC-U shows irregular particles with a porous honeycomb structure. High Cpe was obtained for urea-treated NC-U because of the improvement of nitrogen, conductivity and specific surface area (S BET ). NC-U50 with 13.15 per cent at nitrogen has the highest Cpe of 148.53 F/g because of the highest concentration of N-6 and N-5. NC-K with higher S BET has lower Cpe than NC-U50 because of its lower nitrogen concentration. When the specific power of the supercapacitor with NC-U50 as a negative electrode is 1,565.56 W/kg, its specific energy is still 4.35 Wh/kg. There is only 5.9 per cent decay in Cpe over 1,000 cycles. Research limitations/implications – NC-U is a suitable electrode material for supercapacitors, which can be used in the field of electric vehicles to solve the problems of energy shortage and environmental pollutions. Originality/value – Porous NC-U based on PVP/MF/urea composites with high nitrogen concentration and Cpe is novel, and it owns good electrochemical properties.

Urea-formaldehyde derived porous carbons for adsorption of CO2

RSC Advances ◽  
2016 ◽  
Vol 6 (113) ◽  
pp. 111842-111855 ◽  
Author(s):  
Deepak Tiwari ◽  
Haripada Bhunia ◽  
Pramod K. Bajpai
Keyword(s):  
Nitrogen Content ◽  
Urea Formaldehyde ◽  
Research Work ◽  
Carbon Adsorbents ◽  
Formaldehyde Resin ◽  
Mesoporous Zeolite ◽  
High Nitrogen Content ◽  
High Nitrogen ◽  
Adsorption Of Co2 ◽  
Mcm 41

The aim of the research work is to develop high nitrogen content carbon adsorbents with high textural and surface properties using as a precursor urea-formaldehyde resin and as a template mesoporous-zeolite (MCM-41) through a nanocasting technique.

scholarly journals Stöber synthesis of salen-formaldehyde resin polymer- and carbon spheres with high nitrogen content and application of the corresponding Mn-containing carbon spheres as efficient electrocatalysts for the oxygen reduction reaction

RSC Advances ◽  
2020 ◽  
Vol 10 (46) ◽  
pp. 27575-27584 ◽  
Author(s):  
Tahereh Hosseinzadeh Sanatkar ◽  
Alireza Khorshidi ◽  
Rouhollah Yaghoubi ◽  
Esmail Sohouli ◽  
Jamaladin Shakeri
Keyword(s):  
Oxygen Reduction Reaction ◽  
Nitrogen Content ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Formaldehyde Resin ◽  
Carbon Spheres ◽  
High Nitrogen Content ◽  
High Nitrogen

Stöber synthesis of salen-formaldehyde resin polymer- and carbon spheres.

Poultry Manure as a Fertilizer

EDIS ◽  
2013 ◽  
Vol 2013 (11) ◽  
Author(s):  
Michael A. Davis ◽  
Doug R. Sloan ◽  
Gerald Kidder ◽  
R. D. Jacobs
Keyword(s):  
Organic Matter ◽  
Environmental Factors ◽  
Nitrogen Content ◽  
Soil Amendment ◽  
Poultry Manure ◽  
Nutrient Retention ◽  
High Nitrogen Content ◽  
High Nitrogen ◽  
Animal Science ◽  
Fact Sheet

Animal manures have been used as natural crop fertilizers for centuries. Because of poultry manure’s high nitrogen content, it has long been recognized as one of the most desirable manures. Besides fertilizing crops, manures also supply other essential plant nutrients and serve as a soil amendment by adding organic matter, which helps improve the soil’s moisture and nutrient retention. Organic matter persistence will vary with temperature, drainage, rainfall, and other environmental factors. This 2-page fact sheet was written by Michael A. Davis, D.R. Sloan, Gerald Kidder, and R.D. Jacobs, and published by the UF Department of Animal Science, November 2013. http://edis.ifas.ufl.edu/aa205

scholarly journals How Does an Acidic Support Affect the Hydrotreatment of a Gas Oil with High Nitrogen Content?

2019 ◽  
Vol 33 (2) ◽  
pp. 1467-1472 ◽  
Author(s):  
Minh-Tuan Nguyen ◽  
Gerhard D. Pirngruber ◽  
Florian Albrieux ◽  
Fabien Chainet ◽  
Melaz Tayakout-Fayolle ◽  
...  
Keyword(s):  
Nitrogen Content ◽  
Gas Oil ◽  
High Nitrogen Content ◽  
High Nitrogen ◽  
Acidic Support

NO x and N2O Emissions During Fluidized Bed Combustion of Leather Wastes

2005 ◽  
Vol 128 (2) ◽  
pp. 99-103 ◽  
Author(s):  
Alberto Bahillo ◽  
Lourdes Armesto ◽  
Andrés Cabanillas ◽  
Juan Otero
Keyword(s):  
Nitrogen Content ◽  
Fluidized Bed ◽  
Oxygen Content ◽  
N2o Emission ◽  
N2o Emissions ◽  
Fluidized Bed Combustion ◽  
High Nitrogen Content ◽  
High Nitrogen ◽  
Leather Wastes ◽  
Leather Waste

Transformation of hide (animal skins) into leather is a complicated process during which significant amounts of wastes are generated. Fluidized bed combustion has been extended to burn different wastes that have problems with their disposal showing its technical feasibility. Considering the characteristics of the leather waste, especially the heating value (12.5-21MJ∕kg), it is a fairly good fuel. Moreover, leather waste has a high volatile matter, 65%, similar to other biomasses and unusual high nitrogen content, 14%. The aim of this work was to study leather wastes combustion in fluidized bed presenting experimental results regarding NOx and N2O emissions. A series of experiments were carried out in a fluidized bed pilot plant to understand the importance of operating parameters such as furnace temperature, oxygen content in gases, staged combustion and residence time on the NOx and N2O emission level. Despite having high nitrogen content, low conversion of N-fuel to NOx and N2O was measured during the combustion of leather waste in BFB. Bed temperature and oxygen content were found as the most important single parameters on N2O emission and only oxygen content has a significant influence on NOx emission. Leather waste exhibits a great NOx∕O2 trend; NOx emission decreases as the oxygen concentration decreases while the effect of combustion temperature on NOx is insignificant. Staged combustion does not give a reduction in NOx.

UTILIZATION OF GRASS SILAGE BY CATTLE: EFFECT OF BARLEY AND FISHMEAL SUPPLEMENTS

1985 ◽  
Vol 65 (4) ◽  
pp. 897-903 ◽  
Author(s):  
D. M. VEIRA ◽  
M. IVAN ◽  
G. BUTLER ◽  
J. G. PROULX
Keyword(s):  
Formic Acid ◽  
Nitrogen Content ◽  
Dry Matter ◽  
Dry Matter Intake ◽  
Beef Steers ◽  
Large Reduction ◽  
High Nitrogen Content ◽  
High Nitrogen ◽  
Grass Silage ◽  
Ad Libitum

Following weaning at 6–7 mo of age, 36 beef steers were used to determine production responses when grass silage was supplemented with barley or fishmeal. The silage was made from direct-cut, formic- acid-treated grass harvested from a mixed sward and had a high nitrogen content but poor fermentation characteristics. The silage was fed ad libitum for 98 days either alone or supplemented with 500 g fishmeal or 500 g barley per day. Both fishmeal and barley increased total dry matter intake (P < 0.01) by an amount equivalent to the quantity of supplement offered but had no effect on silage intake (P > 0.05). Steers fed the fishmeal grew substantially faster than either the barley (0.53 kg/day) or unsupplemented (0.54 kg/day) groups (P < 0.01). Fishmeal supplementation resulted in a large reduction (35%) in the amount of feed required per kilogram of gain. Key words: Cattle, grass silage, fishmeal, growth

Highly Ordered Mesoporous Carbon Nitride Nanoparticles with High Nitrogen Content: A Metal-Free Basic Catalyst

2009 ◽  
Vol 48 (42) ◽  
pp. 7884-7887 ◽  
Author(s):  
Xin Jin ◽  
Veerappan V. Balasubramanian ◽  
Sakthivel T. Selvan ◽  
Dhanashri P. Sawant ◽  
Murugulla A. Chari ◽  
...  
Keyword(s):  
Nitrogen Content ◽  
Mesoporous Carbon ◽  
Carbon Nitride ◽  
Ordered Mesoporous Carbon ◽  
Basic Catalyst ◽  
High Nitrogen Content ◽  
High Nitrogen ◽  
Metal Free ◽  
Ordered Mesoporous ◽  
Mesoporous Carbon Nitride

Cyclic strength of an austenitic corrosion-resistant steel with a high nitrogen content

2010 ◽  
Vol 2010 (4) ◽  
pp. 346-353
Author(s):  
V. F. Terent’ev ◽  
I. O. Bannykh ◽  
E. V. Blinov ◽  
M. E. Prutskov ◽  
A. G. Kolmakov ◽  
...  
Keyword(s):  
Nitrogen Content ◽  
Cyclic Strength ◽  
Corrosion Resistant Steel ◽  
Resistant Steel ◽  
High Nitrogen Content ◽  
High Nitrogen ◽  
Corrosion Resistant
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