Nitric Acid Modification of Activated Carbon Electrodes for Improvement of Electrochemical Capacitance

2002 ◽  
Vol 149 (8) ◽  
pp. A1008 ◽  
Author(s):  
Yau-Ren Nian ◽  
Hsisheng Teng
Keyword(s):  
Activated Carbon ◽  
Nitric Acid ◽  
Carbon Electrodes ◽  
Acid Modification ◽  
Electrochemical Capacitance

Improvement in electrochemical capacitance of activated carbon from scrap tires by nitric acid treatment

2014 ◽  
Vol 8 (4) ◽  
pp. 391-398 ◽  
Author(s):  
Yan Han ◽  
Ping-Ping Zhao ◽  
Xiao-Ting Dong ◽  
Cui Zhang ◽  
Shuang-Xi Liu
Keyword(s):  
Activated Carbon ◽  
Nitric Acid ◽  
Acid Treatment ◽  
Electrochemical Capacitance ◽  
Scrap Tires

Characteristics of Activated Carbon Modified with Nitric Acid and its Performance in Catalytic Ozonation of Acid Red 3R

2013 ◽  
Vol 726-731 ◽  
pp. 1687-1690
Author(s):  
Jing Zhang ◽  
Jian Song Liu ◽  
Chun Liu ◽  
Jing Liang Yang ◽  
Lei Zhang
Keyword(s):  
Activated Carbon ◽  
Nitric Acid ◽  
Adsorption Capacity ◽  
Functional Groups ◽  
Chemical Properties ◽  
Catalytic Ozonation ◽  
Alkaline Condition ◽  
Ozone Decomposition ◽  
Acid Modification ◽  
Modified Activated Carbon

The structure and surface chemical properties of activated carbon after nitric acid modification and their influences on adsorption and catalytic ozonation of acid red 3R were investigated. The results showed that both specific surface area and micropore volume of activated carbon decreased, but mesopore volume increased after nitric acid modification. The adsorption capacity and catalytic ozonation performance of modified activated carbon were influenced due to the increased surface acidic functional groups. The adsorption capacity of modified activated carbon was enhanced under acidic condition due to dispersion interaction between increased surface acidic functional groups and acid red 3R. The increase in surface acidic functional groups of activated carbon was also considered to be responsible for improvement of the catalytic ozonation of acid red 3R under alkaline condition, because of their participation in the ozone decomposition and OH generation.

Synergistic Effect of Nitric Acid Modified and Cu(II)-Loaded Activated Carbon on Catalytic Ozonation

2014 ◽  
Vol 1073-1076 ◽  
pp. 708-711
Author(s):  
Jing Zhang ◽  
Ya Wei Du ◽  
Xiao Jing Liu ◽  
Yu Wen Zhou ◽  
Chun Liu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Activated Carbon ◽  
Nitric Acid ◽  
Synergistic Effect ◽  
Functional Groups ◽  
Catalytic Ozonation ◽  
Reusable Catalyst ◽  
Surface Functional Groups ◽  
Acid Modification ◽  
Toc Removal

The surface properties and performance of activated carbon (AC) used for catalytic ozonation were investigated after nitric acid modification (N-AC) and Cu (II)-loaded (N-Cu-AC). The results showed that the nitric acid modification could increase the amount of surface functional groups of AC. As a result, the adsorption capacity and catalytic activity of AC could be improved. The surface functional groups and Cu (II)-loaded of N-Cu-AC showed a synergistic effect on catalytic ozonation, where the catalytic activity of Cu (II)-loaded was more stable. N-Cu-AC was an effective and reusable catalyst for catalytic ozonation. The highest TOC removal efficiency of 58.0% could be achieved when N-Cu-AC was used for 60 min-catalytic ozonation treatment of acid red 3R.

Aerobic granular sludge-derived activated carbon: mineral acid modification and superior dye adsorption capacity

RSC Advances ◽  
2015 ◽  
Vol 5 (32) ◽  
pp. 25279-25286 ◽  
Author(s):  
Ge Zhang ◽  
Li Shi ◽  
Yongfang Zhang ◽  
Dong Wei ◽  
Tao Yan ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Sulfuric Acid ◽  
Nitric Acid ◽  
Adsorption Capacity ◽  
Zinc Chloride ◽  
Dye Adsorption ◽  
Granular Sludge ◽  
Mineral Acid ◽  
Aerobic Granular Sludge ◽  
Acid Modification

A novel aerobic granular sludge-derived activated carbon (AC) was prepared by a zinc chloride activation method and further modified by mineral acid (nitric acid (NA) and sulfuric acid (SA)).

scholarly journals Adsorption of COD in Coking Wastewater on Nitric Acid-Modified Blue Coke Activated Carbon

2019 ◽  
Vol 2019 ◽  
pp. 1-11
Author(s):  
Xu Jiang ◽  
Xinzhe Lan ◽  
Yonghui Song ◽  
Xiangdong Xing
Keyword(s):  
Activated Carbon ◽  
Nitric Acid ◽  
Removal Rate ◽  
Nitric Acid Concentration ◽  
Oxygen Demand ◽  
Coking Wastewater ◽  
Order Kinetic ◽  
Acid Modification ◽  
Order Kinetic Model ◽  
Cod Removal Rate

The blue coke activated carbon (BAC) modified by nitric acid at different concentrations was used as an adsorbent to remove COD from coking wastewater. Characterization of BAC was performed using N2 adsorption/desorption techniques, scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR), and Boehm titration. The results showed the Brunner–Emmet–Teller (BET) specific surface area and iodine value of BAC became higher after modification, and the adsorption capacity of BAC for coking wastewater was effectively improved with nitric acid modification. The optimal nitric acid concentration for modification was 3 mol/L (BAC-N3), which had more acid functional group contents than unmodified. The chemical oxygen demand (COD) removal rate was to reach 77.05% when 4 g BAC-N3 was added into 50 mL coking wastewater in 120 min with a shaking speed of 100 rpm at 25°C. Langmuir model could better describe equilibrium adsorption data by BAC-N3, and the kinetic study showed that the adsorption process was best fitted by the pseudo-second-order kinetic model.

Improvement of Electrochemical Capacitance of Activated Carbon Electrodes from African Palm Shell Modified with HNO3

2021 ◽  
Vol 100 (1) ◽  
pp. 27-35
Author(s):  
Zulamita Zapata ◽  
Erika Arenas ◽  
Daniel Borrás ◽  
Sara Natalia Herrera Penagos
Keyword(s):  
Activated Carbon ◽  
Carbon Electrodes ◽  
Electrochemical Capacitance ◽  
Palm Shell

scholarly journals Electrochemical Capacitance of Composites with MnOx Loaded on the Surface of Activated Carbon Electrodes

2010 ◽  
Vol 26 (08) ◽  
pp. 2151-2157 ◽  
Author(s):  
TIAN Ying ◽  
◽  
YAN Jing-Wang ◽  
LIU Xiao-Xue ◽  
XUE Rong ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Carbon Electrodes ◽  
Electrochemical Capacitance

Effect of different nitric acid concentrations on manganese/activated carbon-modified catalysts for the catalytic ozonation of toluene

2020 ◽  
Vol 10 (19) ◽  
pp. 6729-6737
Author(s):  
Pei-lun Xu ◽  
Tong Wei ◽  
Huan-yu Yue ◽  
Yu-ce Wen ◽  
Yang Wei ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Nitric Acid ◽  
Catalytic Ozonation ◽  
Acid Modification

In this work, the effect of nitric acid modification on activated carbon (AC) and on properties of Mn/AC ozone catalysts was studied.

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