Titanium disulfide decorated hollow carbon spheres towards capacitive deionization

Date

2022-07-01

Author

Ezzati, Milad
Hekmat, Farzaneh
Shahrokhian, Saeed
Ünalan, Hüsnü Emrah

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

105
views

0
downloads

© 2022 Elsevier B.V.Freshwater scarcity in conjunction with population expansion puts human survival in doubt. Throughout the world, millions of people are deprived of clean and safe drinking water. The development of novel technologies to desalinate water is among the most valuable studies for humanity. Receiving benefits from low energy consumption, high environmental capability, and low-production cost, capacitive deionization (CDI) received significant attention in saline water desalination. Rational design of efficient electrode materials by tailoring their structural and compositional properties, therefore, plays a pivotal role in achieving high-performance CDI systems. Hollow carbon spheres (HCSs) with high specific surface area (SSA) and reasonable pore size distribution are highly promising as electrode materials in developing high-performance CDI systems. However, the low electrosorption capacity of HCSs is one of the major obstacles in front of their practical application in CDI technology. Decoration of HCSs with transition metal compounds can be used to address the wettability issue of HCSs and enhance their electrosorption capacity by incorporating Faradic characteristics, which are the major drawbacks of carbonaceous materials. Herein, HCSs are integrally decorated with titanium disulfide (TiS2) through a “sol-gel” assisted route. Electrochemical behavior and CDI performance of the TiS2@HCSs were evaluated. In addition to wettability improvement, ion transfer into the hollow cavities and mesoporous structure of carbonaceous shells are also enhanced by TiS2-decoration of HCSs. Besides, TiS2@HCSs showed significant salt adsorption capacity (18.0 mg g−1) and electrosorption rate. This can be attributed to the synergistic effects between the high surface area and mesoporous structure of HCSs, and the higher wettability and intercalation properties of TiS2. The TiS2-decorated HCSs also showed excellent cycle stability and kept 87% of their initial salt adsorption capacity after 65 cycles. These results demonstrate the potential capability of TiS2@HCSs in practical CDI applications.

Subject Keywords

Capacitive deionization, Core-shell nanostructures, Hollow carbon structures, Intercalation, Titanium disulfide, Water desalination

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85128553925&origin=inward
https://hdl.handle.net/11511/97646

Journal

Desalination

DOI

https://doi.org/10.1016/j.desal.2022.115766

Collections

Department of Metallurgical and Materials Engineering, Article

Suggestions

OpenMETU
Core

NUMERICAL ANALYSIS OF A SOLAR ORGANIC RANKINE CYCLE (ORC) UNIT WITH R245FA AS WORKING FLUID Bamgbopa, Musbaudeen O.; Uzgoren, Eray (2012-07-26) This paper presents a solar Organic Rankine Cycle (ORC) for electricity generation; where a regression based approach is used for the working fluid. Models of the unit's sub-components (pump, evaporator, expander and condenser) are also presented. Heat supplied by the solar field can heat the water up to 80-95 degrees C at mass flow rates of 2-12 kg/s and deliver energy to the ORC's heat exchanger unit. Simulation results of steady state operation using the developed model shows a maximum power output of ar...
Life cycle assessment of off-highway trucks and belt conveyors for sustainable mining Erkayaoğlu, Mustafa; Demirel, Nuray; Department of Mining Engineering (2011) In recent years increasing growth rate of all industrial fields generated an emerging energy demand and consequent environmental problems worldwide. Defining environmental profiles of products and systems using environmental tools, such as Life Cycle Assessment (LCA), is a critical issue for sustainable mining. In order to tackle the increasing environmental challenges and air emissions induced by surface coal mining, alternative material handling options are needed to be evaluated. This research study aims...
Robust optimization of risk-aware, resilient and sustainable closed-loop supply chain network design with Lagrange relaxation and fix-and-optimize Lotfi, Reza; Sheikhi, Zohre; Amra, Mohsen; AliBakhshi, Mehdi; Weber, Gerhard Wilhelm (2021-12-01) This study explores a Robust, Risk-aware, Resilient, and Sustainable Closed-Loop Supply Chain Network Design (3RSCLSCND) to tackle demand fluctuation like COVID-19 pandemic. A two-stage robust stochastic multiobjective programming model serves to express the proposed problems in formulae. The objective functions include minimising costs, CO2 emissions, energy consumption, and maximising employment by applying Conditional Value at Risk (CVaR) to achieve reliability through risk reduction. The Entropic Value ...
Macroecological Patterns of Resilience Inferred from a Multinational, Synchronized Experiment Baho, Didier L.; Tavsanoglu, Ulku Nihan; Sorf, Michal; Stefanidis, Kostantinos; Drakare, Stina; Scharfenberger, Ulrike; Agasild, Helen; Beklioğlu, Meryem; Hejzlar, Josef; Adrian, Rita; Papastergiadou, Eva; Zingel, Priit; Sondergaard, Martin; Jeppesen, Erik; Angeler, David G. (2015-02-01) The likelihood of an ecological system to undergo undesired regime shifts is expected to increase as climate change effects unfold. To understand how regional climate settings can affect resilience; i.e., the ability of an ecosystem to tolerate disturbances without changing its original structure and processes, we used a synchronized mesocosm experiment (representative of shallow lakes) along a latitudinal gradient. We manipulated nutrient concentrations and water levels in a synchronized mesocosm experimen...
Comparative life cycle assessment of uranium recovery from brine Altay, Melike Benan; Kurt, Zöhre; Department of Environmental Engineering (2022-4-15) With the increase in world population and the associated increase in raw material, clean water, and energy demands, seeking for innovative and sustainable methods to decrease the human-made environmental footprint becomes a task of utmost importance. Uranium-based atomic energy the generation has an enormous potential to efficiently supply energy demand at the cost of high environmental impact on water bodies. Therefore, estimating the environmental impacts of the uranium recovery systems from desalination ...

Citation Formats

M. Ezzati, F. Hekmat, S. Shahrokhian, and H. E. Ünalan, “Titanium disulfide decorated hollow carbon spheres towards capacitive deionization,” Desalination, vol. 533, pp. 0–0, 2022, Accessed: 00, 2022. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85128553925&origin=inward.