The Experts below are selected from a list of 327 Experts worldwide ranked by ideXlab platform

Joydeep Dutta - One of the best experts on this subject based on the ideXlab platform.

Dengsong Zhang - One of the best experts on this subject based on the ideXlab platform.

  • n p s co doped hollow carbon polyhedra derived from mof based core shell nanocomposites for capacitive Deionization
    Journal of Materials Chemistry, 2018
    Co-Authors: Jing Zhang, Tingting Yan, Liyi Shi, Jianhui Fang, Jinlong Han, Dengsong Zhang
    Abstract:

    Capacitive Deionization (CDI) is a prospective technique for desalination of saline water on account of its lower cost, lower energy-consumption, and absence of secondary pollution. In this work, capacitive Deionization of saline water using N, P, S co-doped hollow carbon polyhedra derived from MOF-based core–shell nanocomposites has been demonstrated. N, P, S co-doped hollow carbon polyhedra were rationally designed and originally synthesized from MOF-based core–shell nanocomposites by using poly(cyclotriphosphazene-co-4,4′-sulfonyldiphenol) coated zeolitic imidazolate framework-8 (denoted as ZIF-8@PZS-C). Choosing poly(cyclotriphosphazene-co-4,4′-sulfonyldiphenol) as an N, P, S co-doping source and carbon source, and ZIF-8 as a structural template which also acts as an additional N-doping source, ZIF-8@PZS-C was created with a superior hollow structure, high surface area, improved electrical conductivity and an excellent hydrophilic surface. Due to the multi-synergy of these characteristics, the ZIF-8@PZS-C electrodes have lower internal impedance, larger specific capacitance and great cycling stability. What's more, the ZIF-8@PZS-C electrodes display a high salt electrosorption performance of 22.19 mg g−1 at 1.2 V in a NaCl solution of 500 mg L−1. Furthermore, the as-prepared electrodes exhibit good stability and regeneration performance. Hence, the N, P, S co-doped hollow carbon polyhedra should be considered as a promising alternative electrode material for capacitive Deionization. This work may open the door for the application of multiple heteroatom co-doped hollow carbon materials for the Deionization of saline water.

  • Ion-selective asymmetric carbon electrodes for enhanced capacitive Deionization
    RSC Advances, 2018
    Co-Authors: Tingting Yan, Liyi Shi, Jianping Zhang, Dengsong Zhang
    Abstract:

    With the development of capacitive Deionization technology, charge efficiency and electrosorption capacity have become some of the biggest technical bottlenecks. Asymmetric activated carbon electrodes with ion-selective functional groups inspired by membrane capacitive Deionization were developed to conquer these issues. The Deionization capacity increased from 11.0 mg g−1 to 23.2 mg g−1, and the charge efficiency increased from 0.54 to 0.84, due to ion-selective functional groups minimizing the co-ion effect. The charge efficiency and electrosorption capacity resulting from better wettability of these electrodes are effectively enhanced by grafting ion-selective functional groups, which are propitious to ion movement. In addition, asymmetric Deionization capacitors show better cycling stability and higher desalination rates. These experimental results have demonstrated that the modification of the ion-selective (oxygen-containing) functional groups on the surfaces of activated carbon could greatly minimize the co-ion effects and increase the salt removal from the solution. These results have indicated that the ion-selective asymmetric carbon electrodes can promote well the development of Deionization capacitors for practical desalination.

  • Graphene-based materials for capacitive Deionization
    Journal of Materials Chemistry, 2017
    Co-Authors: Peiying Liu, Tingting Yan, Liyi Shi, Ho Seok Park, Xuecheng Chen, Zhigang Zhao, Dengsong Zhang
    Abstract:

    Capacitive Deionization is an emerging technology for energy-efficient water desalination and has attracted more and more attention in recent years. The capacitive Deionization technology is based on ion electrosorption at the surface of a pair of electrically charged electrodes, which are commonly composed of carbon materials. Among numerous electrode materials, graphene-based materials are outstanding, playing a vital role during the Deionization process due to their intriguing features. After a brief introduction of the theory and instruments of capacitive Deionization, we systematically summarize the current progress in graphene nanosheets, porous graphene, graphene-based composites, surface tuned graphene and its composites as electrodes for capacitive Deionization. We also present our perspectives on the development of graphene-based electrodes for capacitive Deionization.

  • three dimensional macroporous graphene architectures as high performance electrodes for capacitive Deionization
    Journal of Materials Chemistry, 2013
    Co-Authors: Hui Wang, Tingting Yan, Liyi Shi, Dengsong Zhang, Jianping Zhang, Xiaoru Wen, Qingdong Zhong
    Abstract:

    In order to obtain excellent desalination behavior during the capacitive Deionization (CDI) process, electrodes should provide efficient pathways for ion and electron transport. Here we open up a new opportunity to prepare high performance capacitive Deionization (CDI) electrodes based on three-dimensional macroporous graphene architectures (3DMGA). The 3DMGA were fabricated by a simple template-directed method using polystyrene microspheres as sacrificial templates. The resulting 3DMGA exhibited a 3D interconnected structure with large specific surface area and high electric conductivity. The electrochemical behavior of the 3DMGA electrodes was analyzed by cyclic voltammetry, galvanostatic charge–discharge and electrochemical impedance spectroscopy. It was found that the 3DMGA showed superiority in electrosorption capacitance, low inner resistance, high reversibility and excellent stability. The power and energy density analysis further demonstrated that the 3DMGA electrode had a higher power output and lower energy consumption. According to the electrochemical measurements, the 3DMGA is quite desirable for high performance and low energy consumption capacitive Deionization. The desalination capacity was evaluated by a batch mode electrosorptive experiment in a NaCl aqueous solution. An excellent desalination behavior of the 3DMGA was obtained due to the large accessible surface area, high electric conductivity and unique 3D interconnected macroporous structure. The 3DMGA was confirmed to be a promising material for CDI application.

  • graphene prepared via a novel pyridine thermal strategy for capacitive Deionization
    Journal of Materials Chemistry, 2012
    Co-Authors: Hui Wang, Tingting Yan, Liyi Shi, Dengsong Zhang, Xiaoru Wen, Jianping Zhang
    Abstract:

    A novel pyridine–thermal strategy for successive exfoliation and reduction of graphite oxide with the use of pyridine as the intercalating agent and dispersant is reported, and the obtained graphene exhibits a good performance in capacitive Deionization.

Karthik Laxman - One of the best experts on this subject based on the ideXlab platform.

Tingting Yan - One of the best experts on this subject based on the ideXlab platform.

  • n p s co doped hollow carbon polyhedra derived from mof based core shell nanocomposites for capacitive Deionization
    Journal of Materials Chemistry, 2018
    Co-Authors: Jing Zhang, Tingting Yan, Liyi Shi, Jianhui Fang, Jinlong Han, Dengsong Zhang
    Abstract:

    Capacitive Deionization (CDI) is a prospective technique for desalination of saline water on account of its lower cost, lower energy-consumption, and absence of secondary pollution. In this work, capacitive Deionization of saline water using N, P, S co-doped hollow carbon polyhedra derived from MOF-based core–shell nanocomposites has been demonstrated. N, P, S co-doped hollow carbon polyhedra were rationally designed and originally synthesized from MOF-based core–shell nanocomposites by using poly(cyclotriphosphazene-co-4,4′-sulfonyldiphenol) coated zeolitic imidazolate framework-8 (denoted as ZIF-8@PZS-C). Choosing poly(cyclotriphosphazene-co-4,4′-sulfonyldiphenol) as an N, P, S co-doping source and carbon source, and ZIF-8 as a structural template which also acts as an additional N-doping source, ZIF-8@PZS-C was created with a superior hollow structure, high surface area, improved electrical conductivity and an excellent hydrophilic surface. Due to the multi-synergy of these characteristics, the ZIF-8@PZS-C electrodes have lower internal impedance, larger specific capacitance and great cycling stability. What's more, the ZIF-8@PZS-C electrodes display a high salt electrosorption performance of 22.19 mg g−1 at 1.2 V in a NaCl solution of 500 mg L−1. Furthermore, the as-prepared electrodes exhibit good stability and regeneration performance. Hence, the N, P, S co-doped hollow carbon polyhedra should be considered as a promising alternative electrode material for capacitive Deionization. This work may open the door for the application of multiple heteroatom co-doped hollow carbon materials for the Deionization of saline water.

  • Ion-selective asymmetric carbon electrodes for enhanced capacitive Deionization
    RSC Advances, 2018
    Co-Authors: Tingting Yan, Liyi Shi, Jianping Zhang, Dengsong Zhang
    Abstract:

    With the development of capacitive Deionization technology, charge efficiency and electrosorption capacity have become some of the biggest technical bottlenecks. Asymmetric activated carbon electrodes with ion-selective functional groups inspired by membrane capacitive Deionization were developed to conquer these issues. The Deionization capacity increased from 11.0 mg g−1 to 23.2 mg g−1, and the charge efficiency increased from 0.54 to 0.84, due to ion-selective functional groups minimizing the co-ion effect. The charge efficiency and electrosorption capacity resulting from better wettability of these electrodes are effectively enhanced by grafting ion-selective functional groups, which are propitious to ion movement. In addition, asymmetric Deionization capacitors show better cycling stability and higher desalination rates. These experimental results have demonstrated that the modification of the ion-selective (oxygen-containing) functional groups on the surfaces of activated carbon could greatly minimize the co-ion effects and increase the salt removal from the solution. These results have indicated that the ion-selective asymmetric carbon electrodes can promote well the development of Deionization capacitors for practical desalination.

  • Graphene-based materials for capacitive Deionization
    Journal of Materials Chemistry, 2017
    Co-Authors: Peiying Liu, Tingting Yan, Liyi Shi, Ho Seok Park, Xuecheng Chen, Zhigang Zhao, Dengsong Zhang
    Abstract:

    Capacitive Deionization is an emerging technology for energy-efficient water desalination and has attracted more and more attention in recent years. The capacitive Deionization technology is based on ion electrosorption at the surface of a pair of electrically charged electrodes, which are commonly composed of carbon materials. Among numerous electrode materials, graphene-based materials are outstanding, playing a vital role during the Deionization process due to their intriguing features. After a brief introduction of the theory and instruments of capacitive Deionization, we systematically summarize the current progress in graphene nanosheets, porous graphene, graphene-based composites, surface tuned graphene and its composites as electrodes for capacitive Deionization. We also present our perspectives on the development of graphene-based electrodes for capacitive Deionization.

  • three dimensional macroporous graphene architectures as high performance electrodes for capacitive Deionization
    Journal of Materials Chemistry, 2013
    Co-Authors: Hui Wang, Tingting Yan, Liyi Shi, Dengsong Zhang, Jianping Zhang, Xiaoru Wen, Qingdong Zhong
    Abstract:

    In order to obtain excellent desalination behavior during the capacitive Deionization (CDI) process, electrodes should provide efficient pathways for ion and electron transport. Here we open up a new opportunity to prepare high performance capacitive Deionization (CDI) electrodes based on three-dimensional macroporous graphene architectures (3DMGA). The 3DMGA were fabricated by a simple template-directed method using polystyrene microspheres as sacrificial templates. The resulting 3DMGA exhibited a 3D interconnected structure with large specific surface area and high electric conductivity. The electrochemical behavior of the 3DMGA electrodes was analyzed by cyclic voltammetry, galvanostatic charge–discharge and electrochemical impedance spectroscopy. It was found that the 3DMGA showed superiority in electrosorption capacitance, low inner resistance, high reversibility and excellent stability. The power and energy density analysis further demonstrated that the 3DMGA electrode had a higher power output and lower energy consumption. According to the electrochemical measurements, the 3DMGA is quite desirable for high performance and low energy consumption capacitive Deionization. The desalination capacity was evaluated by a batch mode electrosorptive experiment in a NaCl aqueous solution. An excellent desalination behavior of the 3DMGA was obtained due to the large accessible surface area, high electric conductivity and unique 3D interconnected macroporous structure. The 3DMGA was confirmed to be a promising material for CDI application.

  • graphene prepared via a novel pyridine thermal strategy for capacitive Deionization
    Journal of Materials Chemistry, 2012
    Co-Authors: Hui Wang, Tingting Yan, Liyi Shi, Dengsong Zhang, Xiaoru Wen, Jianping Zhang
    Abstract:

    A novel pyridine–thermal strategy for successive exfoliation and reduction of graphite oxide with the use of pyridine as the intercalating agent and dispersant is reported, and the obtained graphene exhibits a good performance in capacitive Deionization.

Liyi Shi - One of the best experts on this subject based on the ideXlab platform.

  • n p s co doped hollow carbon polyhedra derived from mof based core shell nanocomposites for capacitive Deionization
    Journal of Materials Chemistry, 2018
    Co-Authors: Jing Zhang, Tingting Yan, Liyi Shi, Jianhui Fang, Jinlong Han, Dengsong Zhang
    Abstract:

    Capacitive Deionization (CDI) is a prospective technique for desalination of saline water on account of its lower cost, lower energy-consumption, and absence of secondary pollution. In this work, capacitive Deionization of saline water using N, P, S co-doped hollow carbon polyhedra derived from MOF-based core–shell nanocomposites has been demonstrated. N, P, S co-doped hollow carbon polyhedra were rationally designed and originally synthesized from MOF-based core–shell nanocomposites by using poly(cyclotriphosphazene-co-4,4′-sulfonyldiphenol) coated zeolitic imidazolate framework-8 (denoted as ZIF-8@PZS-C). Choosing poly(cyclotriphosphazene-co-4,4′-sulfonyldiphenol) as an N, P, S co-doping source and carbon source, and ZIF-8 as a structural template which also acts as an additional N-doping source, ZIF-8@PZS-C was created with a superior hollow structure, high surface area, improved electrical conductivity and an excellent hydrophilic surface. Due to the multi-synergy of these characteristics, the ZIF-8@PZS-C electrodes have lower internal impedance, larger specific capacitance and great cycling stability. What's more, the ZIF-8@PZS-C electrodes display a high salt electrosorption performance of 22.19 mg g−1 at 1.2 V in a NaCl solution of 500 mg L−1. Furthermore, the as-prepared electrodes exhibit good stability and regeneration performance. Hence, the N, P, S co-doped hollow carbon polyhedra should be considered as a promising alternative electrode material for capacitive Deionization. This work may open the door for the application of multiple heteroatom co-doped hollow carbon materials for the Deionization of saline water.

  • Ion-selective asymmetric carbon electrodes for enhanced capacitive Deionization
    RSC Advances, 2018
    Co-Authors: Tingting Yan, Liyi Shi, Jianping Zhang, Dengsong Zhang
    Abstract:

    With the development of capacitive Deionization technology, charge efficiency and electrosorption capacity have become some of the biggest technical bottlenecks. Asymmetric activated carbon electrodes with ion-selective functional groups inspired by membrane capacitive Deionization were developed to conquer these issues. The Deionization capacity increased from 11.0 mg g−1 to 23.2 mg g−1, and the charge efficiency increased from 0.54 to 0.84, due to ion-selective functional groups minimizing the co-ion effect. The charge efficiency and electrosorption capacity resulting from better wettability of these electrodes are effectively enhanced by grafting ion-selective functional groups, which are propitious to ion movement. In addition, asymmetric Deionization capacitors show better cycling stability and higher desalination rates. These experimental results have demonstrated that the modification of the ion-selective (oxygen-containing) functional groups on the surfaces of activated carbon could greatly minimize the co-ion effects and increase the salt removal from the solution. These results have indicated that the ion-selective asymmetric carbon electrodes can promote well the development of Deionization capacitors for practical desalination.

  • Graphene-based materials for capacitive Deionization
    Journal of Materials Chemistry, 2017
    Co-Authors: Peiying Liu, Tingting Yan, Liyi Shi, Ho Seok Park, Xuecheng Chen, Zhigang Zhao, Dengsong Zhang
    Abstract:

    Capacitive Deionization is an emerging technology for energy-efficient water desalination and has attracted more and more attention in recent years. The capacitive Deionization technology is based on ion electrosorption at the surface of a pair of electrically charged electrodes, which are commonly composed of carbon materials. Among numerous electrode materials, graphene-based materials are outstanding, playing a vital role during the Deionization process due to their intriguing features. After a brief introduction of the theory and instruments of capacitive Deionization, we systematically summarize the current progress in graphene nanosheets, porous graphene, graphene-based composites, surface tuned graphene and its composites as electrodes for capacitive Deionization. We also present our perspectives on the development of graphene-based electrodes for capacitive Deionization.

  • three dimensional macroporous graphene architectures as high performance electrodes for capacitive Deionization
    Journal of Materials Chemistry, 2013
    Co-Authors: Hui Wang, Tingting Yan, Liyi Shi, Dengsong Zhang, Jianping Zhang, Xiaoru Wen, Qingdong Zhong
    Abstract:

    In order to obtain excellent desalination behavior during the capacitive Deionization (CDI) process, electrodes should provide efficient pathways for ion and electron transport. Here we open up a new opportunity to prepare high performance capacitive Deionization (CDI) electrodes based on three-dimensional macroporous graphene architectures (3DMGA). The 3DMGA were fabricated by a simple template-directed method using polystyrene microspheres as sacrificial templates. The resulting 3DMGA exhibited a 3D interconnected structure with large specific surface area and high electric conductivity. The electrochemical behavior of the 3DMGA electrodes was analyzed by cyclic voltammetry, galvanostatic charge–discharge and electrochemical impedance spectroscopy. It was found that the 3DMGA showed superiority in electrosorption capacitance, low inner resistance, high reversibility and excellent stability. The power and energy density analysis further demonstrated that the 3DMGA electrode had a higher power output and lower energy consumption. According to the electrochemical measurements, the 3DMGA is quite desirable for high performance and low energy consumption capacitive Deionization. The desalination capacity was evaluated by a batch mode electrosorptive experiment in a NaCl aqueous solution. An excellent desalination behavior of the 3DMGA was obtained due to the large accessible surface area, high electric conductivity and unique 3D interconnected macroporous structure. The 3DMGA was confirmed to be a promising material for CDI application.

  • graphene prepared via a novel pyridine thermal strategy for capacitive Deionization
    Journal of Materials Chemistry, 2012
    Co-Authors: Hui Wang, Tingting Yan, Liyi Shi, Dengsong Zhang, Xiaoru Wen, Jianping Zhang
    Abstract:

    A novel pyridine–thermal strategy for successive exfoliation and reduction of graphite oxide with the use of pyridine as the intercalating agent and dispersant is reported, and the obtained graphene exhibits a good performance in capacitive Deionization.