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| 1 | Continuous flow removal of acid fuchsine by dielectric barrier discharge plasma water bed enhanced by activated carbon adsorption显示文摘Continuous processes which allow for large amount of wastewater to be treated to meet drainage standards while reducing treatment time and energy consumption are urgently needed. In this study, a dielectric barrier discharge plasma water bed system was designed and then coupled with granular activated carbon (GAC) adsorption to rapidly remove acid fuchsine (AF) with high efficiency. Effects of feeding gases, treatment time and initial concentration of AF on removal efficiency were investigated. Results showed that compared to the N2 and air plasmas treatments, O2 plasma processing was most effective for AF degradation due to the strong oxidation ability of generated activated species, especially the OH radicals. The addition of GAC significantly enhanced the removal efficiency of AF in aqueous solution and shorten the required time by 50%. The effect was attributed to the ability of porous carbon to trap and concentrate the dye, increasing the time dye molecules were exposed to the plasma discharge zone, and to enhance the production of OH radicals on/in GAC to boost the degradation of dyes by plasma as well as in situ regenerate the exhausted GAC. The study offers a new opportunity for continuous effective remediation of wastewater contaminated with organic dyes using plasma technologies. | Rusen Zhou Renwu Zhou Xianhui Zhang Kateryna Bazaka Kostya (Ken) Ostrikov | 2019 | Frontiers of Chemical Science and Engineering2019，13，2： | 4 |
| 2 | Graphene Array-Based Anti-fouling Solar Vapour Gap Membrane Distillation with High Energy Efficiency显示文摘Photothermal membrane distillation(MD)is a promising technology for desalination and water purification.However,solar-thermal conversion suffers from low energy efficiency(a typical solar-water efficiency of ~50%),while complex modifications are needed to reduce membrane fouling.Here,we demonstrate a new concept of solar vapour gap membrane distillation(SVGMD)synergistically combining self-guided water transport,localized heating,and separation of membrane from feed solution.A free-standing,multifunctional light absorber based on graphene array is custom-designed to locally heat the thin water layer transporting through graphene nanochannels.The as-generated vapour passes through a gap and condenses,while salt/contaminants are rejected before reaching the membrane.The high solar-water efficiency(73.4% at 1 sun),clean water collection ratio(82.3%),excellent anti-fouling performance,and stable permeate flux in continuous operation over 72 h are simultaneously achieved.Meanwhile,SVGMD inherits the advantage of MD in microorganism removal and water collection,enabling the solar-water efficiency 3.5 times higher compared to state-of-the-art solar vapour systems.A scaled system to treat oil/seawater mixtures under natural sunlight is developed with a purified water yield of 92.8 kg m-2 day-1.Our results can be applied for diverse mixed-phase feeds,leading to the next-generation solar-driven MD technology. | Biyao Gong Huachao Yang Shenghao Wu Guoping Xiong Jianhua Yan Kefa Cen Zheng Bo Kostya Ostrikov | 2019 | Nano-Micro Letters2019，11，3： | 3 |
| 3 | Design of Supercapacitor Electrodes Using Molecular Dynamics Simulations显示文摘Electric double-layer capacitors(EDLCs) are advanced electrochemical devices for energy storage and have attracted strong interest due to their outstanding properties. Rational optimization of electrode–electrolyte interactions is of vital importance to enhance device performance for practical applications. Molecular dynamics(MD) simulations could provide theoretical guidelines for the optimal design of electrodes and the improvement of capacitive performances, e.g., energy density and power density. Here we discuss recent MD simulation studies on energy storage performance of electrode materials containing porous to nanostructures. The energy storage properties are related to the electrode structures, including electrode geometry and electrode modifications. Altering electrode geometry, i.e., pore size and surface topography,can influence EDL capacitance. We critically examine different types of electrode modifications, such as altering the arrangement of carbon atoms, doping heteroatoms and defects, which can change the quantum capacitance. The enhancement of power density can be achieved by the intensified ion dynamics and shortened ion pathway.Rational control of the electrode morphology helps improve the ion dynamics by decreasing the ion diffusion pathway. Tuning the surface properties(e.g., the affinity between the electrode and the ions) can affect the ionpacking phenomena. Our critical analysis helps enhance the energy and power densities of EDLCs by modulating the corresponding electrode structures and surface properties. | Zheng Bo Changwen Li Huachao Yang Kostya Ostrikov Jianhua Yan Kefa Cen | 2018 | Nano-Micro Letters2018，10，2： | 2 |
| 4 | Plasma-electrified up-carbonization for low-carbon clean energy显示文摘Low-value,renewable,carbon-rich resources,with different biomass feedstocks and their derivatives as typical examples,represent virtually inexhaustive carbon sources and carbon-related energy on Earth.Upon conversion to higher-value forms(referred to as“up-carbonization”here),these abundant feedstocks provide viable opportunities for energy-rich fuels and sustainable platform chemicals production.However,many of the current methods for such up-carbonization still lack sufficient energy,cost,and material efficiency,which affect their economics and carbon-emissions footprint.With external electricity precisely delivered,discharge plasmas enable many stubborn reactions to occur under mild conditions,by creating locally intensified and highly reactive environments.This technology emerges as a novel,versatile technology platform for integrated or stand-alone conversion of carbon-rich resources.The plasma-based processes are compatible for integration with increasingly abundant and cost-effective renewable electricity,making the whole conversion carbon-neutral and further paving the plasma-electrified upcarbonization to be performance-,environment-,and economics-viable.Despite the chief interest in this emerging area,no review article brings together the state-of-the-art results from diverse disciplines and underlies basic mechanisms and chemistry underpinned.As such,this review aims to fill this gap and provide basic guidelines for future research and transformation,by providing an overview of the application of plasma techniques for carbon-rich resource conversion,with particular focus on the perspective of discharge plasmas,the fundamentals of why plasmas are particularly suited for upcarbonization,and featured examples of plasma-enabled resource valorization.With parallels drawn and specificity highlighted,we also discuss the technique shortcomings,current challenges,and research needs for future work. | Rusen Zhou Yadong Zhao Renwu Zhou Tianqi Zhang Patrick Cullen Yao Zheng Liming Dai Kostya(Ken)Ostrikov | 2023 | Carbon Energy2023，5，1： | 2 |
| 5 | The large-scale production of graphene flakes using magnetically-enhanced arc discharge between carbon electrodes显示文摘 | I. Levchenko O. Volotskova A. Shashurin Y. Raitses K. Ostrikov M. Keidar | 2010 | Carbon2010，，15： | 2 |
| 6 | Conversion of Catalytically Inert 2D Bismuth Oxide Nanosheets for Effective Electrochemical Hydrogen Evolution Reaction Catalysis via Oxygen Vacancy Concentration Modulation显示文摘Oxygen vacancies(Vo)in electrocatalysts are closely correlated with the hydrogen evo-lution reaction(HER)activity.The role of vacancy defects and the effect of their concentration,how-ever,yet remains unclear.Herein,Bi2O3,an unfavorable electrocata-lyst for the HER due to a less than ideal hydrogen adsorption Gibbs free energy(ΔGH*),is utilized as a perfect model to explore the func-tion of Vo on HER performance.Through a facile plasma irradia-tion strategy,Bi2O3 nanosheets with different Vo concentrations are fabricated to evaluate the influence of defects on the HER process.Unexpectedly,while the generated oxygen vacancies contribute to the enhanced HER performance,higher Vo concentrations beyond a saturation value result in a significant drop in HER activity.By tunning the Vo concentration in the Bi_(2)O_(3)nanosheets via adjusting the treatment time,the Bi2O3 catalyst with an optimized oxygen vacancy concentration and detectable charge carrier concentration of 1.52×10^(24)cm^(−3)demonstrates enhanced HER performance with an overpotential of 174.2 mV to reach 10 mA cm^(−2),a Tafel slope of 80 mV dec−1,and an exchange current density of 316 mA cm−2 in an alkaline solution,which approaches the top-tier activity among Bi-based HER electrocatalysts.Density-functional theory calculations confirm the preferred adsorption of H*onto Bi2O3 as a function of oxygen chemical potential(ΔμO)and oxygen partial potential(PO2)and reveal that high Vo concentrations result in excessive stability of adsorbed hydrogen and hence the inferior HER activity.This study reveals the oxygen vacancy concentration-HER catalytic activity relationship and provides insights into activating catalytically inert materials into highly efficient electrocatalysts. | Ziyang Wu Ting Liao Sen Wang Janith Adikaram Mudiyanselage Aaron SMicallef Wei Li Anthony PO’Mullane Jianping Yang Wei Luo Kostya Ostrikov Yuantong Gu Ziqi Sun | 2022 | Nano-Micro Letters2022，14，6： | 2 |
| 7 | Formation and electron field emission of graphene films grown by hot filament chemical vapor deposition显示文摘 | B.B. Wang K. Zheng Q.J. Cheng L. Wang M.P. Zheng K. Ostrikov | 2013 | Materials Chemistry and Physics2013，，： | 1 |
| 8 | Plasma nanoscience: from nano-solids in plasmas to nano-plasmas in solids显示文摘 | K. Ostrikov E.C. Neyts M. Meyyappan | 2013 | Advances in Physics2013，，2： | 1 |
| 9 | The effect of temperature on the mechanism of photoluminescence from plasma-nucleated, nitrogenated carbon nanotips显示文摘 | B.B. Wang Q.J. Cheng L.H. Wang K. Zheng K. Ostrikov | 2012 | Carbon2012，，10： | 1 |
| 10 | Control of morphology and electrical properties of self-organized graphenes in a plasma显示文摘 | D.H. Seo S. Kumar K. Ostrikov | 2011 | Carbon2011，，13： | 1 |
| 11 | Surface science of plasma exposed surfaces : A challenge for applied plasma science 显示文摘 | Ostrikov K | 2008 | Vacuum2008，83，1： | 1 |
| 12 | Length control of He at- mospheric plasma jet plumes:effects of discharge parameters and ambient air显示文摘 | Xiong Q Lu X Ostrikov K | 2009 | Physics of Plasmas2009，16，04： | 1 |
| 13 | Sustainable Ammonia Synthesis from Nitrogen and Water by One-Step Plasma Catalysis显示文摘Sustainable ammonia synthesis at ambient conditions that relies on renewable sources of energy and feedstocks is globally sought to replace the Haber-Bosch process.Here,using nitrogen and water as raw materials,a nonthermal plasma catalysis approach is demonstrated as an effective powerto-chemicals conversion strategy for ammonia production.By sustaining a highly reactive environment,successful plasma-catalytic production of NH_(3) was achieved from the dissociation of N_(2) and H_(2)O under mild conditions.Plasma-induced vibrational excitation is found to decrease the N_(2) and H_(2)O dissociation barriers,with the presence of matched catalysts in the nonthermal plasma discharge reactor contributing significantly to molecular dissociation on the catalyst surface.Density functional theory calculations for the activation energy barrier for the dissociation suggest that ruthenium catalysts supported on magnesium oxide exhibit superior performance over other catalysts in NH_(3) production by lowering the activation energy for the dissociative adsorption of N_(2) down to 1.07 eV.The highest production rate,2.67 mmol gcat.^(-1) h^(-1),was obtained using ruthenium catalyst supported on magnesium oxide.This work highlights the potential of nonthermal plasma catalysis for the activation of renewable sources to serve as a new platform for sustainable ammonia production. | Tianqi Zhang Renwu Zhou Shuai Zhang Rusen Zhou Jia Ding Fengwang Li Jungmi Hong Liguang Dou Tao Shao Anthony B.Murphy Kostya(Ken)Ostrikov Patrick J.Cullen | 2023 | Energy & Environmental Materials2023，6，2： | 1 |
| 14 | Pulsed DC and sine-wave-excited cold atmospheric plasma plumes:a comparative analysis显示文摘 | Xiong Q Lu X P Ostrikov K | | 0，，4： | 1 |
| 15 | Recent advances towards aqueous hydrogen peroxide formation in a direct current plasma-liquid system显示文摘The aqueous phase hydrogen peroxide(H_(2)O_(2aq))produced from the plasma-liquid interactions can directly or synergistically(with other substances)affect the liquid chemistry,and therefore it is important to unfold the H_(2)O_(2aq)formation mechanism.However,up to now,a consensus on the H_(2)O_(2aq)formation mechanism is not reached.This review aims to survey the recent advances on the understanding of the H_(2)O_(2aq)formation mechanism in the system of a direct current discharge plasma operated over a liquid electrode.Theoretical and experimental analyses indicate that the recombination of dissolved OH radicals(OHaq)is the dominant process for the H_(2)O_(2aq)formation,while the purported plasma-induced photolysis of water and the dissolution of gaseous H_(2)O_(2)are ruled out. | Qiang Chen Junshuai Li Qiang Chen Kostya(Ken)Ostrikov | 2022 | High Voltage2022，7，3： | 1 |
| 16 | Length control of He atmospheric plasma jet plumes:effects of discharge parameters and ambient air显示文摘 | Xiong Q Lu X Ostrikov K | | 0，，： | 1 |
| 17 | Ion-acoustic waves in a complex plasma with negative ions显示文摘 | VLADIMIROV S V OSTRIKOV K YU M Y | 2003 | Phys Rev E2003，67，03： | 1 |
| 18 | 查看详情显示文摘 | Denysenko I Ostrikov K Yu M Y | | 0，，： | 1 |
| 19 | Diagnostics and two-dimensional simulation of low-frequency inductively coupled plasmas with neutral gas heating and electron heat fluxes 显示文摘 | Ostrikov KN Denysenko IB Tsakadze EL | 2002 | Journal of Applied Physics2002，92，9： | 1 |
| 20 | Carbon nanorods and graphene-like nanosheets by hot filament CVD: Growth mechanisms and electron field emission显示文摘 | Wang B B Ostrikov K Laan T | 2013 | Jour- nal of Materials Chemistry C2013，1，： | 1 |
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