scholarly journals Lignocellulisic Nanopouros Carbon Materials for Fuel Cells

2021 ◽  
Author(s):  
Ance Pļavniece
Keyword(s):  
Activated Carbon ◽  
High Efficiency ◽  
Carbon Materials ◽  
Raw Material ◽  
Added Value ◽  
Nitrogen Doped ◽  
Thermochemical Process ◽  
Mesoporous Activated Carbon ◽  
Wood Char ◽  
Lignocellulose Biomass

Studies have shown that high-efficiency micro- and mesoporous activated carbon with high added value can be obtained on the basis of lignocellulose biomass in a three-stage thermochemical process. A methodology has been developed for the synthesis of nitrogen-doped activated carbon by synthesis with dicyandiamide in dimethylformamide suspension as a raw material using wood, its processing residues and wood char.

Loofah Activated Carbon Sodium Alginate Hydrogel Microspheres with High Efficiency Cyclic Adsorption for Antibiotic Contaminants

2020 ◽  
Vol 15 (2) ◽  
pp. 219-225
Author(s):  
Zhe Wang ◽  
Wenyao Li ◽  
Kenan Zhang ◽  
Haishun Jiang ◽  
Tao Ji ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Sodium Alginate ◽  
High Efficiency ◽  
Raw Material ◽  
Resistant Bacteria ◽  
Alginate Hydrogel ◽  
Adsorption Mechanisms ◽  
Drug Resistant Bacteria ◽  
Antibiotic Solution ◽  
Cyclic Adsorption

The global abuse of antibiotics has led to many environment problems such as water pollution and drug-resistant bacteria. In this study, pure natural loofah was used as raw material to form powdered loofah activated carbon (LAC) after high temperature carbonization annealing, and sodium alginate (SA) with gel ability was combined to prepare loofah activated carbon sodium alginate (LAC-SA) hydrogel sphere by external emulsification method. This work showed that the adsorption mechanisms of LAC-SA microspheres for the three antibiotics of ofloxacin (OFO), tetracycline (TC) and norfloxacin (NFO) were in line by the psedosecond-order and the formula of Langmuir. The ofloxacin (OFO) antibiotic solution was used as a sample for cyclic adsorption experiment for 10 times and the cumulative adsorption amount exceeded 700 mg g–1.

Preparation of nitrogen-doped microporous modified biochar by high temperature CO2–NH3 treatment for CO2 adsorption: effects of temperature

RSC Advances ◽  
2016 ◽  
Vol 6 (100) ◽  
pp. 98157-98166 ◽  
Author(s):  
Xiong Zhang ◽  
Jing Wu ◽  
Haiping Yang ◽  
Jingai Shao ◽  
Xianhua Wang ◽  
...  
Keyword(s):  
High Temperature ◽  
High Efficiency ◽  
Co2 Adsorption ◽  
Agricultural Waste ◽  
Raw Material ◽  
Nitrogen Doped ◽  
Adsorption Effects ◽  
Modified Biochar ◽  
Effects Of Temperature ◽  
Soybean Straw

Nitrogen-rich agricultural waste, soybean straw, was used as a raw material to prepare high efficiency CO2 adsorbents (nitrogen-doped porous modified biochars).

Activated carbon from nitrogen rich watermelon rind for high-performance supercapacitors

RSC Advances ◽  
2016 ◽  
Vol 6 (64) ◽  
pp. 59333-59342 ◽  
Author(s):  
Ru-Juan Mo ◽  
Yang Zhao ◽  
Min Wu ◽  
Hong-Mei Xiao ◽  
Shigenori Kuga ◽  
...  
Keyword(s):  
Activated Carbon ◽  
High Performance ◽  
Carbon Materials ◽  
Nitrogen Doped ◽  
Watermelon Rind ◽  
Biomass Materials ◽  
Nitrogen Doped Carbon ◽  
First Time

Nitrogen rich biomass materials was selected as precursor of nitrogen-doped carbon materials for supercapacitor for the first time.

scholarly journals Superior nitrogen-doped activated carbon materials for water cleaning and energy storing prepared from renewable leather wastes

2020 ◽  
Vol 142 ◽  
pp. 105846 ◽  
Author(s):  
Wanying Han ◽  
Hongliang Wang ◽  
Kedong Xia ◽  
Shanshuai Chen ◽  
Puxiang Yan ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Carbon Materials ◽  
Nitrogen Doped ◽  
Water Cleaning ◽  
Leather Wastes

Hydrogenation of 4-nitrochlorobenzene catalysed by cobalt nanoparticles supported on nitrogen-doped activated carbon

2021 ◽  
Author(s):  
Juan Jose Villora-Pico ◽  
Ignacio Campello-Gómez ◽  
Juan Carlos Serrano-Ruiz ◽  
M. Mercedes Pastor-Blas ◽  
A. Sepulveda-Escribano ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Cobalt Nanoparticles ◽  
Added Value ◽  
Nitrogen Doped ◽  
Industrial Role

The hydrogenation of nitroarenes to produce the corresponding amines using dihydrogen as reductant has an important industrial role since it allows to obtain important added-value products. This reaction needs the...

scholarly journals Preparation Process of Straw-based Activated Carbon for Uranium Wastewater Treatment

2020 ◽  
Vol 185 ◽  
pp. 04057
Author(s):  
Hongtao Wang ◽  
Rong Gui ◽  
Wenxia Zhu ◽  
Hankun lu ◽  
Wenze Geng ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Citric Acid ◽  
Adsorption Capacity ◽  
High Efficiency ◽  
Formation Rate ◽  
Raw Material ◽  
Uranyl Ions ◽  
Adsorption Effect ◽  
Adsorption Sites ◽  
Uranium Wastewater

A process and equipment for preparing activated carbon from straw and its application in treating uranium wastewater are proposed. The ZnCl2-microwave carbonization method is adopted, which flexibly applies the wave absorbing ability of zinc element and greatly reduces the carbonization time. At the same time, the dehydrogenation of ZnCl2 limits the formation of coal tar and improves the carbon formation rate. Through citric acid modification, a functional group with specific adsorbability to uranyl ions is formed, which can produce high-efficiency complexation effect with uranyl ions and improve the adsorption capacity of uranyl ions. When the wastewater is mixed with other heavy metal elements, uranyl ions occupy the main adsorption sites, which can still maintain excellent targeted adsorption effect and can be targeted to treat uranyl ions in radioactive uranium wastewater. The key equipment in the process consists of cleaning and impurity removal components, raw material crushing components and carbonization components. The whole production process is completed in the same equipment. The optimum adsorption capacity (Ac) of 4.98 mg/g and uranium adsorption rate (Ar) of 99% were obtained by using soybean straw as raw material under the preparation conditions of 20% ZnCl2 solution and 15% citric acid solution.

scholarly journals Nelumbo nucifera Seed–Derived Nitrogen-Doped Hierarchically Porous Carbons as Electrode Materials for High-Performance Supercapacitors

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3175
Author(s):  
Lok Kumar Shrestha ◽  
Rekha Goswami Shrestha ◽  
Rashma Chaudhary ◽  
Raja Ram Pradhananga ◽  
Birendra Man Tamrakar ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Double Layer ◽  
Current Density ◽  
Electrical Double Layer ◽  
High Performance ◽  
Carbon Materials ◽  
Nelumbo Nucifera ◽  
Hierarchically Porous ◽  
Nitrogen Doped ◽  
Double Layer Capacitor

Biomass-derived activated carbon materials with hierarchically nanoporous structures containing nitrogen functionalities show excellent electrochemical performances and are explored extensively in energy storage and conversion applications. Here, we report the electrochemical supercapacitance performances of the nitrogen-doped activated carbon materials with an ultrahigh surface area prepared by the potassium hydroxide (KOH) activation of the Nelumbo nucifera (Lotus) seed in an aqueous electrolyte solution (1 M sulfuric acid: H2SO4) in a three-electrode cell. The specific surface areas and pore volumes of Lotus-seed–derived carbon materials carbonized at a different temperatures, from 600 to 1000 °C, are found in the range of 1059.6 to 2489.6 m2 g−1 and 0.819 to 2.384 cm3 g−1, respectively. The carbons are amorphous materials with a partial graphitic structure with a maximum of 3.28 atom% nitrogen content and possess hierarchically micro- and mesoporous structures. The supercapacitor electrode prepared from the best sample showed excellent electrical double-layer capacitor performance, and the electrode achieved a high specific capacitance of ca. 379.2 F g−1 at 1 A g−1 current density. Additionally, the electrode shows a high rate performance, sustaining 65.9% capacitance retention at a high current density of 50 A g−1, followed by an extraordinary long cycle life without any capacitance loss after 10,000 subsequent charging/discharging cycles. The electrochemical results demonstrate that Nelumbo nucifera seed–derived hierarchically porous carbon with nitrogen functionality would have a significant probability as an electrical double-layer capacitor electrode material for the high-performance supercapacitor applications.

scholarly journals Preparation and Characterization of Bio-Nitrogen-Doped Activated Carbon

2021 ◽  
Author(s):  
xingping ZHANG ◽  
Haichao Li ◽  
Guangle Wang ◽  
Qingsong Ji ◽  
Tian Liang
Keyword(s):  
Activated Carbon ◽  
Chemical Activation ◽  
Raw Material ◽  
Optimum Conditions ◽  
Activation Temperature ◽  
Nitrogen Doped ◽  
Impregnation Time ◽  
Biological Nitrogen ◽  
Pyridinic N

Abstract Blood (livestock blood) is a cheap and readily available biomass material with a relatively high protein content.In this study, bio-nitrogen doped activated carbon (BN-AC) was prepared by chemical activation method with nitrogen-rich pig blood as raw material and magnesium chloride as activator.The specific surface area of BN-AC is 283.719 m2/g, and the pore volume is 0.128 cm3/g.The optimum conditions for the preparation of BN-AC were as follows: the mass impregnation ratio of activator to blood powder was 2:1, the impregnation time was 12 h, and the activation temperature was 600 ℃.The forms of biological nitrogen in activated carbon were studied by elemental analysis, Boehm titration, FTIR and XPS.The results showed that the total basicity of 0.720 mmol/g, and acidity of 0.313 mmol/g of the BN-AC.The surface of the precursor has only one Pyrrolic N, and the surface of BN-AC contains Pyridinic N, Pyrrolic N and Graphitic N, the N content of the precursor was successfully preserved.BN-AC has higher methylene blue and iodine adsorption values than ordinary activated carbon.

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