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Recent advances in cycloaddition of CO with epoxides: halogen-free catalysis and mechanistic insights

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 12,   Pages 1879-1894 doi: 10.1007/s11705-023-2354-4

Abstract: systematically discussed the halogen-free catalysis for cycloaddition of CO2 with epoxides from the mechanistic

Keywords： carbon dioxide     halogen-free catalysis     cyclic carbonate     mechanistic insight    

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Mechanistic insight into the biofilm formation and process performance of a passive aeration ditch (PAD

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 7, doi: 10.1007/s11783-021-1494-3

Abstract:

• A Passive Aeration Ditch was developed to treat decentralized wastewater.

Keywords： Decentralized wastewater     Passive aeration ditch     Biofilm formation     C/N ratio     Salinity     Model simulation    

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Evaluation of 1,4-naphthoquinone derivatives as antibacterial agents: activity and mechanistic studies

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 3, doi: 10.1007/s11783-023-1631-2

Abstract:

● All 1,4-naphthoquinone hybrids exhibited significant antimicrobial activity.

Keywords： 1     4-naphthoquinone derivatives     Antibacterial     Action mechanism     RecA    

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Mechanistic insights into the selective photocatalytic degradation of dyes over TiO/ZSM-11

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 8, doi: 10.1007/s11783-023-1701-5

Abstract:

● TiO2/ZSM-11 was prepared by a facile solid state dispersion method.

Keywords： Selective dye degradation     Photocatalysis     TiO2     ZSM-11     Chemisorption    

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Caveolin proteins: a molecular insight into disease

Hongli Yin,Tianyi Liu,Ying Zhang,Baofeng Yang

Frontiers of Medicine 2016, Volume 10, Issue 4,   Pages 397-404 doi: 10.1007/s11684-016-0483-6

Abstract:

Caveolae are a kind of specific cystic structures of lipid rafts in the cytoplasmic membrane and are rich in cholesterol and sphingolipids. In recent years, many researchers have found that both caveolins and caveolae play a role in the development of various human diseases, including coronary heart disease, hypertension, and nervous system disorders. The specific mechanisms by which caveolins induce diseases have been a topic of interest. However, a number of detailed molecular mechanisms remain poorly understood. This article focuses on the relationship between caveolin proteins and human diseases and reviews the molecular mechanisms of caveolins in disease networks.

Keywords： caveolin     caveolae     microRNA     disease     signaling pathway     heart     tumor    

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Mechanism insight into the formation of HS from thiophene pyrolysis: A theoretical study

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1404-8

Abstract:

• Possible formation pathways of H2S were revealed in thiophene pyrolysis.

Keywords： Density functional theory     Waste rubber     Thiophene     H2S     Pyrolysis    

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Improved film evaporator for mechanistic understanding of microwave-induced separation process

Xin Gao, Dandan Shu, Xingang Li, Hong Li

Frontiers of Chemical Science and Engineering 2019, Volume 13, Issue 4,   Pages 759-771 doi: 10.1007/s11705-019-1816-1

Abstract: Microwave-induced film evaporation separation process has been reported recently to separate the polar/nonpolar mixture. However, the efficiency of the separation is still too low for practical applications, which requires further enhancement via different strategies such as optimization design of evaporator structure. In addition the depth understanding of the separation mechanisms is great importance for better utilization of the microwave-induced separation process. To carry out these investigations, a novel microwave-induced falling film evaporation instrument was developed in this paper. The improvement of the enhancement effect of microwave-induced separation was observed based on the improved film evaporator. The systematic experiments on microwave-induced separation with different binary azeotropic mixtures (ethanol-ethyl acetate system and dimethyl carbonate (DMC)-H O system) were conducted based on the new evaporator. For the ethanol-ethyl acetate system, microwave irradiation shift the direction of evaporation separation at higher ethanol content in the starting liquid mixture. Moreover, for DMC-H O system microwave-induced separation process broke through the limitations of the traditional distillation process. The results clearly demonstrated the microwave-induced evaporation separation process could be commendably applied to the separation of binary azeotrope with different dielectric properties. Effects of operating parameters are also investigated to trigger further mechanism understanding on the microwave-induced separation process.

Keywords： process intensification     microwave     falling film evaporation     separation     azeotrope    

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doping boosted low-temperature NH-SCR activity of FeTiO catalyst: A microstructure analysis and reaction mechanistic

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 5, doi: 10.1007/s11783-022-1539-2

Abstract:

• CeO2 doping significantly improved low-temperature NH3-SCR activity on FeTiOx.

Keywords： NH3-SCR     CeO2 doping     Low-temperature NOx removal     Improved redox property     In situ XAFS analysis    

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Performance and mechanistic study on electrocoagulation process for municipal wastewater treatment based

Zhenlian Qi, Shijie You, Ranbin Liu, C. Joon Chuah

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 3, doi: 10.1007/s11783-020-1215-3

Abstract: EC modified with BPEs enhances pollutant removal and reduce energy consumption. Increasing BPE number cannot increase flocculants yield exponentially. Simulations help to predict the distribution of electrochemical reactions on BPEs. The design of electrodes is crucial to electrocoagulation process (EC), specifically, with respect to pollutant removal and energy consumption. During EC, the mechanisms for interaction between different electrode arrangement and electrode reactions remain unclear. This work presents an integrated EC process based on horizontal bipolar electrodes (BPEs). In the electrochemical cell, the graphite plates are used as driving cathode while either Fe or Al plates serves as driving anode and BPEs. The BPEs are placed horizontally between the driving electrodes. For municipal wastewater treatment, the pollutant removal efficiency and energy consumption in different configurations of two-dimension electrocoagulation (2D-EC) system with horizontal BPEs were investigated. The removal efficiency of turbidity, total phosphorus and total organic carbon increased significantly with the number of BPEs. Noted that the energy consumption for TP removal decreased by 75.2% with Fe driving anode and 81.5% with Al driving anode than those of 2D-EC, respectively. In addition, the physical field simulation suggested the distributions of potential and current in electrolyte and that of induced charge density on BPE surface. This work provides a visual theoretical guidance to predict the distribution of reactions on BPEs for enhanced pollutant removal and energy saving based on electrocoagulation process for municipal wastewater treatment.

Keywords： Electrocoagulation     Bipolar electrodes     Municipal wastewater     Simulations    

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Cadmium removal mechanistic comparison of three Fe-based nanomaterials: Water-chemistry and roles of

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 12, doi: 10.1007/s11783-022-1586-8

Abstract:

● nZVI, S-nZVI, and nFeS were systematically compared for Cd(II) removal.

Keywords： Nano zero valent iron     Sulfided zero valent iron     FeS     Cd(II) immobilization     Fe dissolution    

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EDTA-intercalated layered double hydroxide for enhanced recovery of Cr(VI) and Congo red: Adsorptive and mechanistic

Jing Li, Haiqin Yu, Xue Zhang, Rixin Zhu, Liangguo Yan

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 3, doi: 10.1007/s11783-020-1229-x

Abstract: Functional groups of AM and EDTA in composite increased removal of Cr(VI) and CR. Removal process reached equilibrium within 30 min and was minimally affected by pH. Elimination of Cr(VI) was promoted by coexisting CR. Adsorption process of CR was less influenced by the presence of Cr(VI). Mechanisms were electrostatic attraction, surface complexation and anion exchange. We prepared ethylenediaminetetraacetic acid (EDTA)-intercalated MgAl-layered double hydroxide (LDH-EDTA), then grafted acrylamide (AM) to the LDH-EDTA by a cross-linking method to yield a LDH-EDTA-AM composite; we then evaluated its adsorptive ability for Congo red (CR) and hexavalent chromium (Cr(VI)) in single and binary adsorption systems. The adsorption process on LDH-EDTA-AM for CR and Cr(VI) achieved equilibrium quickly, and the removal efficiencies were minimally affected by initial pH. The maximum uptake quantities of CR and Cr(VI) on LDH-EDTA-AM were 632.9 and 48.47 mg/g, respectively. In mixed systems, chromate removal was stimulated by the presence of CR, while the adsorption efficiency of CR was almost not influenced by coexisting Cr(VI). The mechanisms involved electrostatic attraction, surface complexation, and anion exchange for the adsorption of both hazardous pollutants. In the Cr(VI) adsorption process, reduction also took place. The removal efficiencies in real contaminated water were all higher than those in the laboratory solutions.

Keywords： Chromate     Dye adsorption     Simultaneous removal     Cross-linking method     Amino functionalization    

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Design and mechanism insight on SiC quantum dots sensitized inverse opal TiO with superior photocatalytic

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 12,   Pages 1913-1924 doi: 10.1007/s11705-023-2350-8

Abstract: The combination of SiC quantum dots sensitized inverse opal TiO2 photocatalyst is designed in this work and then applied in wastewater purification under simulated sunlight. From various spectroscopic techniques, it is found that electrons transfer directionally from SiC quantum dots to inverse opal TiO2, and the energy difference between their conduction/valence bands can reduce the recombination rate of photogenerated carriers and provide a pathway with low interfacial resistance for charge transfer inside the composite. As a result, a typical type-II mechanism is proved to dominate the photoinduced charge transfer process. Meanwhile, the composite achieves excellent photocatalytic performances (the highest apparent kinetic constant of 0.037 min–1), which is 6.2 times (0.006 min–1) and 2.1 times (0.018 min–1) of the bare inverse opal TiO2 and commercial P25 photocatalysts. Therefore, the stability and non-toxicity of SiC quantum dots sensitized inverse opal TiO2 composite enables it with great potential in practical photocatalytic applications.

Keywords： inverse opal TiO2     silicon carbide quantum dots     quantum dot sensitized photocatalyst     type-II charge transfer route    

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New insight into effect of potential on degradation of Fe-N-C catalyst for ORR

Yanyan GAO, Manman QI, Liang HE, Haiping CHEN, Wenzhe LUO, Ming HOU, Zhigang SHAO

Frontiers in Energy 2021, Volume 15, Issue 2,   Pages 421-430 doi: 10.1007/s11708-021-0727-2

Abstract: In this paper, a new insight into the effect of potential on degradation of Fe-N-C catalyst was provided

Keywords： proton exchange membrane fuel cells (PEMFCs)     oxygen reduction reaction (ORR)     Fe-N-C catalyst     potential     H2O2     degradation    

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Insight from Japan’s Hydrogen Strategy and Activities

Hai-Wen Li,  Nobuyuki Nishimiya

Engineering 2021, Volume 7, Issue 6,   Pages 722-725 doi: 10.1016/j.eng.2020.12.020

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Design Method and Numerical Control Machining Principle for an Arbitrary n-polygon Noncircular Section

WU Yi-jie, LENG Hong-bin

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 1,   Pages 71-75 doi: 10.1007/s11465-005-0005-8

Abstract: Based on the mechanistic transmission principle, the control theorems for the numerical control (NC)

Keywords： manufacture     multicoordinate     characteristic     polygonal noncircular     mechanistic transmission    

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Title Author Date Type Operation

Recent advances in cycloaddition of CO with epoxides: halogen-free catalysis and mechanistic insights

Journal Article

Mechanistic insight into the biofilm formation and process performance of a passive aeration ditch (PAD

Journal Article

Evaluation of 1,4-naphthoquinone derivatives as antibacterial agents: activity and mechanistic studies

Journal Article

Mechanistic insights into the selective photocatalytic degradation of dyes over TiO/ZSM-11

Journal Article

Caveolin proteins: a molecular insight into disease

Hongli Yin,Tianyi Liu,Ying Zhang,Baofeng Yang

Journal Article

Mechanism insight into the formation of HS from thiophene pyrolysis: A theoretical study

Journal Article

Improved film evaporator for mechanistic understanding of microwave-induced separation process

Xin Gao, Dandan Shu, Xingang Li, Hong Li

Journal Article

doping boosted low-temperature NH-SCR activity of FeTiO catalyst: A microstructure analysis and reaction mechanistic

Journal Article

Performance and mechanistic study on electrocoagulation process for municipal wastewater treatment based

Zhenlian Qi, Shijie You, Ranbin Liu, C. Joon Chuah

Journal Article

Cadmium removal mechanistic comparison of three Fe-based nanomaterials: Water-chemistry and roles of

Journal Article

EDTA-intercalated layered double hydroxide for enhanced recovery of Cr(VI) and Congo red: Adsorptive and mechanistic

Jing Li, Haiqin Yu, Xue Zhang, Rixin Zhu, Liangguo Yan

Journal Article

Design and mechanism insight on SiC quantum dots sensitized inverse opal TiO with superior photocatalytic

Journal Article

New insight into effect of potential on degradation of Fe-N-C catalyst for ORR

Yanyan GAO, Manman QI, Liang HE, Haiping CHEN, Wenzhe LUO, Ming HOU, Zhigang SHAO

Journal Article

Insight from Japan’s Hydrogen Strategy and Activities

Hai-Wen Li,  Nobuyuki Nishimiya

Journal Article

Design Method and Numerical Control Machining Principle for an Arbitrary n-polygon Noncircular Section

WU Yi-jie, LENG Hong-bin

Journal Article