Effects of activated carbon characteristics on the electrosorption capacity of titanium dioxide/activated carbon composite electrode materials prepared by a microwave-assisted ionothermal synthesis method

Liu, Po‐I; Chung, Li‐Ching; Ho, ChiaHua; Shao, Hsin; Liang, Teh-Ming; Horng, Ren‐Yang; Chang, Man; Chen‐Chi, M.

doi:10.1016/j.jcis.2014.12.007

Cited by 29 publications

(7 citation statements)

References 26 publications

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“…The weight difference between the coated and uncoated samples was used to determine the percent loading of the TiO 2 . Moreover, the TiO 2 had a particle size in a range of 7-12 nm, which was observed by TEM [21].…”

Section: Microwave-assisted Ionothermal Synthesis Of Tio 2 /Ac Compositementioning

confidence: 71%

“…The results showed that the MAIS TiO2/AC electrodes had higher average capacitance than those without TiO2; this could be due to the dielectric constant of TiO2 (86-173), which is approximately an order of magnitude higher than those of activated carbon and graphite (10-15) [24]. In our previous study [20,21], the increase in electrode capacitance after TiO2 modification is due to the deposition of anatase TiO2 with a suitable amount of Ti-OH. Higher amounts of the Ti-OH can improve the surface wetting ability of the AC electrode, thereby facilitating the access ability of solution ions to the surface of the AC electrode and a higher uptake capacity of the ions on the electrode.…”

Section: Cyclic Voltammetry Analysis Of the Electrodesmentioning

confidence: 97%

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Titanium Dioxide/Activated Carbon Electrode with Polyurethane Binder for the Removal of Indium Ions via Capacitive Deionization

et al. 2021

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The process of removing indium ions from aqueous solutions by applying capacitive deionization (CDI) is reported in this manuscript. First, a modified carbon material was prepared by incorporating titanium dioxide (TiO2) into activated carbon (AC). A microwave-assisted ionothermal synthesis (MAIS) method was used to produce evenly distributed nanostructured anatase TiO2 on the surface of AC. A polyurethane (PU) elastomer was then synthesized as the binder material instead of using conventional polyvinylidene fluoride (PVDF). By combining the aforementioned materials, a MAIS TiO2/AC-PU electrode was synthesized and applied to CDI tests. Scanning electron microscopy (SEM) was used to characterize the size and dispersion of the composites. For electrochemical properties, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were used to analyze the synthesized electrode. The performance of the prepared electrode during the CDI process was tested in different concentrations of indium solutions. It was discovered that the indium removal efficiency can be as high as 84% in 1 and 5 ppm of indium solutions.

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Section: Microwave-assisted Ionothermal Synthesis Of Tio 2 /Ac Compositementioning

confidence: 71%

Section: Cyclic Voltammetry Analysis Of the Electrodesmentioning

confidence: 97%

Titanium Dioxide/Activated Carbon Electrode with Polyurethane Binder for the Removal of Indium Ions via Capacitive Deionization

et al. 2021

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“…[ 119,120,127,177–179 ] To enhance the desalination performance of TiO 2 , some shortcomings including the low electronic conductivity and sluggish ion diffusion should be relieved. In this regard, several studies have fabricated nanosized TiO 2 [ 177,179 ] and combined TiO 2 with carbon‐based substrates, such as hollow carbon fiber, [ 179 ] activated carbon, [ 178 ] graphene, [ 177 ] and multiwalled carbon nanotubes. [ 120 ] Ramadan et al.…”

Section: Faradaic Electrode Materials For CDImentioning

confidence: 99%

Faradaic Electrodes Open a New Era for Capacitive Deionization

et al. 2020

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Capacitive deionization (CDI) is an emerging desalination technology for effective removal of ionic species from aqueous solutions. Compared to conventional CDI, which is based on carbon electrodes and struggles with high salinity streams due to a limited salt removal capacity by ion electrosorption and excessive co-ion expulsion, the emerging Faradaic electrodes provide unique opportunities to upgrade the CDI performance, i.e., achieving much higher salt removal capacities and energy-efficient desalination for high salinity streams, due to the Faradaic reaction for ion capture. This article presents a comprehensive overview on the current developments of Faradaic electrode materials for CDI. Here, the fundamentals of Faradaic electrode-based CDI are first introduced in detail, including novel CDI cell architectures, key CDI performance metrics, ion capture mechanisms, and the design principles of Faradaic electrode materials. Three main categories of Faradaic electrode materials are summarized and discussed regarding their crystal structure, physicochemical characteristics, and desalination performance. In particular, the ion capture mechanisms in Faradaic electrode materials are highlighted to obtain a better understanding of the CDI process. Moreover, novel tailored applications, including selective ion removal and contaminant removal, are specifically introduced. Finally, the remaining challenges and research directions are also outlined to provide guidelines for future research.

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“…Recently, it has been noted that fluoride removal can also be done by biomass-based chemically modified activated carbon due to their low cost and availability (Li and Zhang 2011). Those chemically modified activated carbons are zirconium-impregnated coconut shell (Liao and Shi 2005;Liu et al 2015;Megregian 1954), aluminum hydroxidecoated rice husk (Yang et al 2015) and tamarind fruit shell carbon ).…”

Section: Activated Carbonmentioning

confidence: 99%

Treatment of fluoride-contaminated water. A review

Kumar¹,

Suganya²,

Srinivas³

et al. 2019

Environ Chem Lett

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Delivering the right amount of fluoride to drinking water protects the teeth from decay and reduces the risk of cavities. Nonetheless, fluorosis has been diagnosed as the result of excessive exposure of fluoride, which induces brain impairment, muscle disorders and hyperactivity. Fluoride ingestion during the formation of the tooth enamel is the main reason for fluorosis, which is characterized by hypomineralization. Dissolution of fluoride-containing rock minerals contributes to naturally occurring fluoride contamination in water. The intentional addition of fluoride to water in dental care is alarming in growing countries such as India. This article reviews the origin of fluoride, the analysis of fluoride derivatives and the technologies to remove fluoride from water. The manuscript presents adsorption techniques for fluoride removal, using different types of adsorbents. The adsorption capacities of adsorbents under various conditions, such as contaminant concentration, adsorbent dosage, time, pH and temperature, are presented. Adsorbent types include alumina, zeolites, organic waste, shell-based and carbon-based including graphite and carbon nanotubes. Defluoridation of water using clays and muds, modified activated alumina, chitosan derivatives and composites are also discussed.

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Effects of activated carbon characteristics on the electrosorption capacity of titanium dioxide/activated carbon composite electrode materials prepared by a microwave-assisted ionothermal synthesis method

Cited by 29 publications

References 26 publications

Titanium Dioxide/Activated Carbon Electrode with Polyurethane Binder for the Removal of Indium Ions via Capacitive Deionization

Titanium Dioxide/Activated Carbon Electrode with Polyurethane Binder for the Removal of Indium Ions via Capacitive Deionization

Faradaic Electrodes Open a New Era for Capacitive Deionization

Treatment of fluoride-contaminated water. A review

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