Improvement of water softening efficiency in capacitive deionization by ultra purification process of reduced graphene oxide

2015 ◽  
Vol 15 (11) ◽  
pp. 1397-1401 ◽  
Author(s):  
Trinh Ngoc Tuan ◽  
Sangho Chung ◽  
Jae Kwang Lee ◽  
Jaeyoung Lee
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Capacitive Deionization ◽  
Purification Process ◽  
Water Softening ◽  
Reduced Graphene

scholarly journals Preparation and application of reduced graphene oxide as the conductive material for capacitive deionization

2014 ◽  
Vol 15 (1) ◽  
pp. 38-44 ◽  
Author(s):  
Ayu Tyas Utami Nugrahenny ◽  
Jiyoung Kim ◽  
Sang-Kyung Kim ◽  
Dong-Hyun Peck ◽  
Seong-Ho Yoon ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Capacitive Deionization ◽  
Conductive Material ◽  
Reduced Graphene

scholarly journals Sustainable Desalination by 3:1 Reduced Graphene Oxide/Titanium Dioxide Nanotubes (rGO/TiONTs) Composite via Capacitive Deionization at Different Sodium Chloride Concentrations

Nanomaterials ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 1319 ◽  
Author(s):  
John Paolo L. Lazarte ◽  
Liza Bautista-Patacsil ◽  
Ramon Christian P. Eusebio ◽  
Aileen H. Orbecido ◽  
Ruey-an Doong
Keyword(s):  
Titanium Dioxide ◽  
Graphene Oxide ◽  
Energy Consumption ◽  
Reduced Graphene Oxide ◽  
Contact Angles ◽  
Capacitive Deionization ◽  
Titanium Dioxide Nanotubes ◽  
Charging Time ◽  
Reduced Graphene ◽  
Charge Discharge

The capability of novel 3:1 reduced graphene oxide/titanium dioxide nanotubes (rGO/TiONTs) composite to desalinate using capacitive deionization (CDI) employing highly concentrated NaCl solutions was tested in this study. Parameters such as material wettability, electrosorption capacity, charge efficiency, energy consumption, and charge-discharge retention were tested at different NaCl initial concentrations—100 ppm, 2000 ppm, 15,000 ppm, and 30,000 ppm. The rGO/TiONTs composite showed good material wettability before and after CDI runs with its contact angles equal to 52.11° and 56.07°, respectively. Its two-hour electrosorption capacity during CDI at 30,000 ppm NaCl influent increased 1.34-fold compared to 100 ppm initial NaCl influent with energy consumption constant at 1.11 kWh per kg with NaCl removed. However, the percentage discharge (concentration-independent) at zero-voltage ranged from 4.9–7.27% only after 30 min of desorption. Repeated charge/discharge at different amperes showed that the slowest charging rate of 0.1 A·g−1 had the highest charging time retention at 60% after 100 cycles. Increased concentration likewise increases charging time retention. With this consistent performance of a CDI system utilizing rGO/TiONTs composite, even at 30,000 ppm and 100 cycles, it can be a sustainable alternative desalination technology, especially if a low charging current with reverse voltage discharge is set for a longer operation.

TiO2 nanorod-intercalated reduced graphene oxide as high performance electrode material for membrane capacitive deionization

Desalination ◽  
2015 ◽  
Vol 361 ◽  
pp. 53-64 ◽  
Author(s):  
Ahmed G. El-Deen ◽  
Jae-Hwan Choi ◽  
Cheol Sang Kim ◽  
Khalil Abdelrazek Khalil ◽  
Abdulhakim A. Almajid ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Electrode Material ◽  
High Performance ◽  
Capacitive Deionization ◽  
Tio2 Nanorod ◽  
Reduced Graphene

scholarly journals Nano-manganese oxide and reduced graphene oxide incorporated polyacrylonitrile fiber mats as electrode material for capacitive deionization (CDI) technology

2021 ◽  
Author(s):  
Nalin De Silva ◽  
Induni Siriwardena ◽  
Nadeesha P. W. Rathuwadu ◽  
Damayanthi Dahanayake ◽  
Chanaka Sandaruwan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Manganese Dioxide ◽  
Reduced Graphene Oxide ◽  
Electrode Material ◽  
Water Desalination ◽  
Polyacrylonitrile Fiber ◽  
Capacitive Deionization ◽  
Fiber Mats ◽  
Reduced Graphene ◽  
Impurity Ions

Capacitive deionization (CDI) is a trending water desalination method, during which the impurity ions in water can be removed by electrosorption. In this study, nano-manganese dioxide (MnO2) and reduced graphene...

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