Enhanced salt-adsorption capacity of ambient pressure dried carbon aerogel activated by CO2 for capacitive deionization application

Kohli, Deepak; Singh, Rashmi; Singh, Ashish; Bhartiya, S.; Singh, M. K.; Gupta, Pooja

doi:10.1080/19443994.2014.903208

Cited by 19 publications

(7 citation statements)

References 25 publications

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“…The value is higher than those of CNT 15 and AC, 16 and is consistent with the reports. 38 The results of the CDI test match well with the above results of nitrogen adsorption and CV test.…”

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confidence: 75%

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Capacitive deionization of NaCl solutions with ambient pressure dried carbon aerogel microsphere electrodes

Quan

Yuan

et al. 2017

RSC Adv.

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Carbon aerogel (CA) microspheres were pyrolyzed from resorcinol-formaldehyde (RF) organic aerogels, which were prepared by emulsion polymerization of resorcinol and formaldehyde using ambient drying technique. Structural and microstructural characteristics of CA microspheres were investigated by scanning electron microscopy (SEM), Raman spectroscopic techniques and nitrogen adsorption. The With the optimum initial NaCl concentration of 500 mg L À1 and applied voltage of 1.2 V, the specific salt-adsorption capacity for CA microspheres was found to be 5.62 mg g À1. The electrosorption and electrodesorption procedures displayed the stability and regeneration of CA microsphere electrodes.This preliminary study demonstrated that the CA microsphere electrodes in CDI process can be considered to be an alternative candidate for desalination.

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confidence: 75%

“…) [38][39][40] and applied voltage (0.8-1.4 V) were found to have an effect on the CDI systems. Under the operation parameters, the specic salt-adsorption capacity of CA microspheres was calculated.…”

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confidence: 99%

Capacitive deionization of NaCl solutions with ambient pressure dried carbon aerogel microsphere electrodes

Quan

Yuan

et al. 2017

RSC Adv.

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“…With this objective we carried out CO 2 activation at high temperature (~900C) of carbon aerogel (CA) prepared using the method described in our earlier work 13 . Table 1 summarizes the textural properties of carbon aerogel and CO 2 -activated carbon aerogel (ACA) determined using surface area analyser (Micromeritics, ASAP2020).…”

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confidence: 99%

Assessment of Human Exposure to Dissolved Radon in Groundwater around the Uranium Industry of Jaduguda, Jharkhand, India

Sethy¹,

Jha²,

Ravi³

et al. 2015

Current Science

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Radium, thorium, and radioactive lead isotopes in groundwaters: application to the in situ determination of adsorptiondesorption rate constants and retardation factors. Water Resour. Res., 1982Res., , 18, 1663Res., -1675. Kozowska, B., Walencik, A., Dorda, J. and Zipper, W., Radon in groundwater and dose estimation for inhabitants in spas of the Sudety Mountain area, Poland. Appl. Radiat. Isot., 2010, 68, 854-857. 19. Zouridakis, N., Ochsenkühn, K. M. and Savidou, A., Determination of uranium and radon in potable water samples. CATALYSED exchange of deuterium (D) between hydrogen (H) gas and liquid water (liquid phase catalytic exchange (LPCE) reaction) using bi-thermal hydrogen water (BHW) process is receiving considerable attention for heavy water production 1 . This is because it is more energy-efficient and environment-friendly compared to the existing 'girder sulphide' and 'ammonia-hydrogen' processes. The catalysed exchange involves two stepsfirst, deuterium exchange between hydrogen gas and water vapour at the catalytic site and subsequently equilibration of deuterated water vapour with liquid water at gas-liquid interface, which results in the transfer of deuterium from gas to liquid phase. Success of the process requires simultaneous presence of H 2 gas and water vapour at the catalytic site and easy accessibility of liquid water to water vapour involved in isotopic exchange reaction. However, because the solubility of H 2 gas in water is poor, if the catalytic site is covered with liquid water, the exchange of deuterium between hydrogen gas and water vapour is highly impeded 2 . Therefore, a primary requirement for the LPCE process is that the catalyst should allow access of gaseous reactants to the catalytic RESEARCH COMMUNICATIONS CURRENT SCIENCE, VOL. 109, NO. 10, 25 NOVEMBER 2015 1861 However, these show good activity only up to atmospheric pressure and rapidly lose activity as the pressure is increased above atmospheric pressure. This has limited the use of the LPCE process for relatively low-throughput applications like removal of tritium from heavy water of the moderator used in pressurized heavy water reactor operation 10 . The reduction in catalyst activity at higher pressure is believed to arise due to ingression of water at such pressure through pores in the fibrous network or mesh structure of the commonly used hydrophobic binders like PTFE and SDBC. Indeed, the studies carried out by Malhotra et al. 11 showed how the size and distribution of pore in binder contribute to the loss of activity at higher pressure. To address this issue, we have explored different approaches like high-pressure melting of PTFE film, PTFE overcoat, coating of other binders like polyvinylidenedifluoride (PVDF), perfluoroalkoxyalkanes (PFA), etc. to control the porosity of the film. These studies have led us to the successful development of hydrophobic platinumdoped carbon aerogel (PtCA) catalyst that shows good catalytic activity even up to 20 bar.In our earlier studies we had mixed PtCA powder synthesized...

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“…This peak was disappeared after activation process. The activation also improved the properties of carbon aerogel [14,15].…”

Section: Trang 94mentioning

confidence: 90%

Characteristics of carbon aerogel at variation in pyrolysis conditions

Le¹,

Pham²,

Le³

2016

Sci. Tech. Dev. J.

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Carbon aerogel was obtained by pyrolysis of organic aerogel by ambient pressure drying technique. The effect of pyrolysis conditions on characteristics of carbon aerogel such as density, specific surface area and conductivity was studied. The properties and structure of carbon aerogel samples were investigated by nitrogen adsorption, four-point probe method and XRD diffraction. The results showed that carbon aerogel had structure between amorphous and graphite state. The highest specific surface area was 800 m2/g at pyrolysis temperature of 700oC. The pore-size was distributed in microporous, with the maximum total pore volume of 0.44 cm3/g. The electrical conductivity of carbon aerogel was highest at pyrolysis temperature of 800-900oC with the value in the range of 1.744-1.923 S/cm.

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Enhanced salt-adsorption capacity of ambient pressure dried carbon aerogel activated by CO2 for capacitive deionization application

Cited by 19 publications

References 25 publications

Capacitive deionization of NaCl solutions with ambient pressure dried carbon aerogel microsphere electrodes

Capacitive deionization of NaCl solutions with ambient pressure dried carbon aerogel microsphere electrodes

Assessment of Human Exposure to Dissolved Radon in Groundwater around the Uranium Industry of Jaduguda, Jharkhand, India

Characteristics of carbon aerogel at variation in pyrolysis conditions

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