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Fabrication of coconut shell-derived porous carbons for CO adsorption application

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 8,   Pages 1122-1130 doi: 10.1007/s11705-022-2292-6

Abstract: Depending on the different activating temperatures (from 700 to 800 °C) and KOH/biomass mass ratios (

Keywords： porous carbons     CO2 adsorption     KOH activation     single step reaction     biomass    

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Challenge of biodiesel production from sewage sludge catalyzed by KOH, KOH/activated carbon, and KOH/

Xuemin Wu,Fenfen Zhu,Juanjuan Qi,Luyao Zhao,Fawei Yan,Chenghui Li

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 2, doi: 10.1007/s11783-017-0913-y

Abstract: KOH/activated carbon was a better catalyst for biodiesel production.In this study, we utilize in situ transesterification by base catalyst (KOH, KOH/activated carbon (AC) and KOH/CaO) with sewage sludge as raw material., KOH/CaO, and KOH/AC.As to BET of KOH/AC and the good spiculate formation of KOH crystal appears to be essential to its function

Keywords： Biodiesel     Sewage sludge     Base catalyst     In situ transesterification    

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Enhanced activation of peroxymonosulfate by CNT-TiO

Xuemin Hao, Guanlong Wang, Shuo Chen, Hongtao Yu, Xie Quan

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 5, doi: 10.1007/s11783-019-1161-0

Abstract: In this work, a UV-light assisted peroxymonosulfate (PMS) activation system was constructed with theirradiation, the photoinduced electrons generated from TiO2 could be continuously transferred to CNT for the activationcatalytic performance was ascribed to the introduction of photoinduced electrons, which could enhance the activation

Keywords： Peroxymonosulfate activation     Carbon nanotubes     TiO2     Water treatment    

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Hierarchical porous carbon derived from one-step self-activation of zinc gluconate for symmetric supercapacitors

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 4,   Pages 387-394 doi: 10.1007/s11705-022-2250-3

Abstract: straightforward and effective strategy is presented for producing highly porous carbons via a self-activation

Keywords： self-activation     zinc organic salts     abundant mesopores     symmetric supercapacitor     liquid electrolyte    

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Enhanced performance of oxygen vacancies on CO adsorption and activation over different phases of ZrO

Frontiers in Energy 2023, Volume 17, Issue 4,   Pages 545-554 doi: 10.1007/s11708-023-0867-7

Abstract: The effect of oxygen vacancies on the adsorption and activation of CO2 on the surface of differentThe calculations show that the oxygen vacancies contribute greatly to both the adsorption and activationFurthermore, the activation of CO2 on the ZrO2 surface where oxygen vacancies areThis finding demonstrates that the presence of oxygen vacancies promotes the activation of CO2

Keywords： CO2 activation     oxygen vacancies     ZrO2     different phases    

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A density functional theory study of methane activation on MgO supported NiM cluster: role of M on C–Hactivation

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 10,   Pages 1485-1492 doi: 10.1007/s11705-022-2169-8

Abstract: Methane activation is a pivotal step in the application of natural gas converting into high-value addedIn present work, methane activation on MgO supported Ni–M (M = Fe, Co, Cu, Pd, Pt) cluster was exploredDoping elements of the same period in Ni cluster, such as Fe, Co and Cu, for C–H bond activation followsIn addition, doping the elements of the same family, like Pd and Pt, for CH4 activation isConsequently, C–H bond activation demands a lower energy barrier on Ni–Pt cluster.

Keywords： CH4 dissociation     Ni–M     C–H bond activation     charge transfer    

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Decomposition of aqueous chlorinated contaminants by UV irradiation with H

Eunsung KAN,Chang-Il KOH,Kyunghyuk LEE,Joonwun KANG

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 3,   Pages 429-435 doi: 10.1007/s11783-014-0677-6

Abstract: In the present study, the decomposition rates of carbon tetrachloride (CCl ) and 2,4-dichlorophenol (2,4-DCP) in water by the ultraviolet (UV) light irradiation alone and H O /UV were experimentally investigated. The detailed experimental studies have been conducted for examining treatment capacities of the two different ultraviolet light sources (low and medium pressure Hg arc) in H O /UV processes. The low or medium UV lamp alone resulted in a 60%–90% decomposition of 2,4-DCP while a slight addition of H O resulted in a drastic enhancement of the 2,4-DCP decomposition rate. The decomposition rate of 2,4-DCP with the medium pressure UV lamp alone was about 3–6 times greater than the low pressure UV lamp alone. In the direct photolysis of aqueous CCl , the medium pressure UV lamp had advantage over the low pressure UV lamp because the molar extinction coefficient of CCl at shorter wavelength (210–220 nm) is about 20 to 50 times higher than that at 254 nm. However, adding H O to the medium pressure UV lamp system rendered a negative oxidation rate because H O acted as a UV absorber being competitive with CCl due to negligible reaction between CCl and OH radicals. The results from the present study indicated significant influence of the photochemical properties of the target contaminants on the photochemical treatment characteristics for designing cost-effective UV-based degradation of toxic contaminants.

Keywords： H2O2/ultraviolet (UV) light     advanced oxidation     UV light irradiation     chlorinated contaminants     photochemical treatment characteristics    

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Optimal dynamic emergency reserve activation using spinning, hydro and demand-side reserves

S. Surender REDDY,P. R. BIJWE,A. R. ABHYANKAR

Frontiers in Energy 2016, Volume 10, Issue 4,   Pages 409-423 doi: 10.1007/s11708-016-0431-9

Abstract: This paper proposes an optimal dynamic reserve activation plan after the occurrence of an emergency situationThe proposed reserve activation approaches are solved using the genetic algorithm, and some of the simulationThese results demonstrate the advantage of the proposed integrated/dynamic reserve activation plan over

Keywords： demand-side reserves     dynamic reserve activation approach     hydro power units     post contingency     sequentialreserve activation approach     spinning reserves    

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Tumor-derived exosomes induce initial activation by exosomal CD19 antigen but impair the function of

Frontiers of Medicine doi: 10.1007/s11684-023-1010-1

Abstract: Tumor-derived exosomes induce initial activation by exosomal CD19 antigen but impair the function of

Keywords： exosomes induce activation     impair function CD19     exosomal CD19 antigen    

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Coronary leukocyte activation in relation to progression of coronary artery disease

Marijke A. de Vries,Arash Alipour,Erwin Birnie,Andrew Westzaan,Selvetta van Santen,Ellen van der Zwan,Anho H. Liem,Noëlle van der Meulen,Manuel Castro Cabezas

Frontiers of Medicine 2016, Volume 10, Issue 1,   Pages 85-90 doi: 10.1007/s11684-016-0435-1

Abstract:

Leukocyte activation has been linked to atherogenesis, but there is little in vivo We evaluated the predictive value for progression of coronary artery disease (CAD) of leukocyte activation

Keywords： coronary artery disease     inflammation     integrin     myeloperoxidase     leukocyte activation    

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Heating energy savings potential from retrofitting old apartments with an advanced double-skin façade system in cold climate

Yeo Beom YOON, Byeongmo SEO, Brian Baewon KOH, Soolyeon CHO

Frontiers in Energy 2020, Volume 14, Issue 2,   Pages 224-240 doi: 10.1007/s11708-020-0801-1

Abstract: Apartments account for over 60% of total residential buildings and consume a significant portion of primary energy in South Korea. Various energy efficiency measures have been implemented for both new apartment constructions and existing apartment retrofits. Old apartment structures have poor thermal performances, resulting in a high energy consumption. The South Korean government initiated retrofitting projects to improve the energy efficiency in old apartments. Apartment owners typically replace old windows with high-performance windows; however, there is still a demand for better and more innovative retrofit methods for a highly improved energy efficiency. This paper proposes an advanced double-skin façade (DSF) system to replace existing balcony windows in old apartments. Considering the cold climate conditions of Seoul, South Korea, it mainly discusses heating energy savings. Three case models were developed: Base-Case with existing apartment, Case-1 with typical retrofitting, and Case-2 with the proposed DSF system. The EnergyPlus simulation program was used to develop simulation models for a floor radiant heating system. A typical gas boiler was selected for low-temperature radiant system modeling. The air flow network method was used to model the proposed DSF system. Five heating months, i.e., November to March, and one representative day, i.e., January 24, were selected for detailed analysis. The main heat loss areas consist of windows, walls, and infiltration. The results reveal that the apartment with the DSF retrofit saves 38.8% on the annual heating energy compared to the Base-Case and 35.2% compared to Case-1.

Keywords： double-skin façade     retrofitting     high-rise apartment     heating energy     building simulation    

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NETO2 promotes melanoma progression via activation of the Ca/CaMKII signaling pathway

Frontiers of Medicine 2023, Volume 17, Issue 2,   Pages 263-274 doi: 10.1007/s11684-022-0935-0

Abstract: Melanoma is the most aggressive cutaneous tumor. Neuropilin and tolloid-like 2 (NETO2) is closely related to tumorigenesis. However, the functional significance of NETO2 in melanoma progression remains unclear. Herein, we found that NETO2 expression was augmented in melanoma clinical tissues and associated with poor prognosis in melanoma patients. Disrupting NETO2 expression markedly inhibited melanoma proliferation, malignant growth, migration, and invasion by downregulating the levels of calcium ions (Ca2+) and the expression of key genes involved in the calcium signaling pathway. By contrast, NETO2 overexpression had the opposite effects. Importantly, pharmacological inhibition of CaMKII/CREB activity with the CaMKII inhibitor KN93 suppressed NETO2-induced proliferation and melanoma metastasis. Overall, this study uncovered the crucial role of NETO2-mediated regulation in melanoma progression, indicating that targeting NETO2 may effectively improve melanoma treatment.

Keywords： melanoma     neuropilin and tolloid-like 2     Ca2+/CaMKII signaling pathway    

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Insights into the electron transfer mechanisms of permanganate activation by carbon nanotube membrane

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 9, doi: 10.1007/s11783-023-1706-0

Abstract:

● A CNT filter enabled effective KMnO4 activation via

Keywords： KMnO4     Carbon nanotubes     Non-radical pathway     Electron transfer     Water treatment    

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The role of manganese oxides in the activation of peroxymonosulfate (PMS)

Jianzhi Huang, Huichun Zhang

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 5, doi: 10.1007/s11783-019-1158-8

Abstract: Here, the role of MnOx (as both oxidants and catalysts) in the activation of Oxone was briefly discussed

Keywords： Peroxymonosulfate     Manganese oxides     Catalyst     Oxidant    

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to water purification for resource-constrained settings: Production of activated biochar by chemical activation

Mohit Nahata, Chang Y. Seo, Pradeep Krishnakumar, Johannes Schwank

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 1,   Pages 194-208 doi: 10.1007/s11705-017-1647-x

Abstract: temperature of 450 °C, the loading of DAP over cellulose is systematically varied, and its effect on activation

Keywords： cellulose     DAP     activation     heteroatom     microporous    

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Title Author Date Type Operation

Fabrication of coconut shell-derived porous carbons for CO adsorption application

Journal Article

Challenge of biodiesel production from sewage sludge catalyzed by KOH, KOH/activated carbon, and KOH/

Xuemin Wu,Fenfen Zhu,Juanjuan Qi,Luyao Zhao,Fawei Yan,Chenghui Li

Journal Article

Enhanced activation of peroxymonosulfate by CNT-TiO

Xuemin Hao, Guanlong Wang, Shuo Chen, Hongtao Yu, Xie Quan

Journal Article

Hierarchical porous carbon derived from one-step self-activation of zinc gluconate for symmetric supercapacitors

Journal Article

Enhanced performance of oxygen vacancies on CO adsorption and activation over different phases of ZrO

Journal Article

A density functional theory study of methane activation on MgO supported NiM cluster: role of M on C–Hactivation

Journal Article

Decomposition of aqueous chlorinated contaminants by UV irradiation with H

Eunsung KAN,Chang-Il KOH,Kyunghyuk LEE,Joonwun KANG

Journal Article

Optimal dynamic emergency reserve activation using spinning, hydro and demand-side reserves

S. Surender REDDY,P. R. BIJWE,A. R. ABHYANKAR

Journal Article

Tumor-derived exosomes induce initial activation by exosomal CD19 antigen but impair the function of

Journal Article

Coronary leukocyte activation in relation to progression of coronary artery disease

Marijke A. de Vries,Arash Alipour,Erwin Birnie,Andrew Westzaan,Selvetta van Santen,Ellen van der Zwan,Anho H. Liem,Noëlle van der Meulen,Manuel Castro Cabezas

Journal Article

Heating energy savings potential from retrofitting old apartments with an advanced double-skin façade system in cold climate

Yeo Beom YOON, Byeongmo SEO, Brian Baewon KOH, Soolyeon CHO

Journal Article

NETO2 promotes melanoma progression via activation of the Ca/CaMKII signaling pathway

Journal Article

Insights into the electron transfer mechanisms of permanganate activation by carbon nanotube membrane

Journal Article

The role of manganese oxides in the activation of peroxymonosulfate (PMS)

Jianzhi Huang, Huichun Zhang

Journal Article

to water purification for resource-constrained settings: Production of activated biochar by chemical activation

Mohit Nahata, Chang Y. Seo, Pradeep Krishnakumar, Johannes Schwank

Journal Article