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Insights into the Organotemplate-Free Synthesis of Zeolite Catalysts

Yeqing Wang,Qinming Wu,Xiangju Meng,Feng-Shou Xiao

Engineering 2017, Volume 3, Issue 4,   Pages 567-574 doi: 10.1016/J.ENG.2017.03.029

Abstract: This article briefly summarizes the role of organic templates and describes designed routes for the organotemplate-freesynthesis of zeolites, aided by zeolite seeds and zeolite seeds solution.this review explicates that the micropore volume decreases with an increase of the Si/Al ratios in the organotemplate-freesynthesis of zeolite products, where Na+ exists as an alkali cation.ratios under organotemplate-free conditions, and is thus important for the efficient design of zeolites

Keywords： Zeolite seed-directed synthesis     Organotemplate-free synthesis     Zeolite seeds solution     Si/Al ratios     Zeolite    

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Template-free synthesis of hierarchically macro-mesoporous Mn-TiO

Zhao Peng, Li-Hua Chen, Ming-Hui Sun, Pan Wu, Chang Cai, Zhao Deng, Yu Li, Wei-Hong Zheng, Bao-Lian Su

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 1,   Pages 43-49 doi: 10.1007/s11705-017-1679-2

Abstract: This study described a template-free method for the synthesis of hierarchically macro-mesoporous Mn-TiO

Keywords： titania     hierarchically macro-mesoporous structure     Mn-doping     selective catalytic reduction    

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Nitrogen-doped graphene approach to enhance the performance of a membraneless enzymatic biofuel cell

Alireza AHMADIAN YAZDI, Jie XU

Frontiers in Energy 2018, Volume 12, Issue 2,   Pages 233-238 doi: 10.1007/s11708-018-0529-3

Abstract: Thus, here we first synthesized N-graphene via a catalyst-free single-step thermal process, and made

Keywords： enzymatic fuel cell     nitrogen-doped graphene     reduced graphene oxide     catalyst-free synthesis    

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Ultrasound-assisted co-precipitation synthesis of mesoporous Co3O4–CeO2 composite oxides for highly selective

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 8,   Pages 1211-1223 doi: 10.1007/s11705-022-2145-3

Abstract: The one-step highly selective oxidation of cyclohexane into cyclohexanone and cyclohexanol as the essential intermediates of nylon-6 and nylon-66 is considerably challenging. Therefore, an efficient and low-cost catalyst must be urgently developed to improve the efficiency of this process. In this study, a Co3O4–CeO2 composite oxide catalyst was successfully prepared through ultrasound-assisted co-precipitation. This catalyst exhibited a higher selectivity to KA-oil, which was benefited from the synergistic effects between Co3+/Co2+ and Ce4+/Ce3+ redox pairs, than bulk CeO2 and/or Co3O4. Under the optimum reaction conditions, 89.6% selectivity to KA-oil with a cyclohexane conversion of 5.8% was achieved over Co3O4–CeO2. Its catalytic performance remained unchanged after five runs. Using the synergistic effects between the redox pairs of different transition metals, this study provides a feasible strategy to design high-performance catalysts for the selective oxidation of alkanes.

Keywords： oxides     cyclohexanone     cyclohexanol     ultrasonic-assisted co-precipitation     selective oxidation     solvent-free    

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Cell-free systems in the new age of synthetic biology

Fernando Villarreal,Cheemeng Tan

Frontiers of Chemical Science and Engineering 2017, Volume 11, Issue 1,   Pages 58-65 doi: 10.1007/s11705-017-1610-x

Abstract: The advent of synthetic biology has ushered in new applications of cell-free transcription-translationThese cell-free systems are reconstituted using cellular proteins, and are amenable to modular controlHere, we discuss the historical advancement of cell-free systems, as well as their new applications incircuits and components, directed evolution of biomolecules, diagnosis of infectious diseases, and synthesisFinally, we present our vision on the future direction of cell-free synthetic biology.

Keywords： cell-free system     application    

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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: To address these concerns, the halogen-free cycloaddition of CO2 with epoxides has alwaysIn this review, we systematically discussed the halogen-free catalysis for cycloaddition of CO2freeSpecially, metal oxides as the potential halogen-free catalysts are highlighted due to their flexible

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

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Hollow carbon spheres and their noble metal-free hybrids in catalysis

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 6,   Pages 1380-1407 doi: 10.1007/s11705-021-2097-z

Abstract: Herein, we overview hollow carbon sphere-based materials and their noble metal-free hybrids in catalysiscontrolling pore structure and surface morphology, and then heterogeneous doping as well as their metal-freeintroduce the various challenges and opportunities offered by hollow carbon spheres from the perspective of synthesis

Keywords： hollow carbon spheres     functionalization     noble metal-free     catalysis    

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Decontamination of Cr(VI) facilitated formation of persistent free radicals on rice husk derived biochar

Kaikai Zhang, Peng Sun, Yanrong Zhang

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 2, doi: 10.1007/s11783-019-1106-7

Abstract:

PFRs were produced on biochar during Cr(VI) decontamination.

PFRs formation on biochar was owing to the oxidization of phenolic-OH by Cr(VI).

Appearance of excessive oxidant led to the consumption of PFRs on biochar.

Biochar charred at high temperature possessed great performance to Cr(VI) removal.

Keywords： Biochar     Persistent free radicals     Phenolic hydroxyl groups     Cr(VI) reduction    

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Thermoresponsive block copolymer supported Pt nanocatalysts for base-free aerobic oxidation of 5-hydroxymethyl

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 6,   Pages 1514-1523 doi: 10.1007/s11705-021-2092-4

Abstract: A base-free catalytic system for the aerobic oxidation of 5-hydroxymethyl-2-furfural was exploited byThe Pt nanocatalysts were well-dispersed and highly active for the base-free oxidation of 5-hydroxymethyl

Keywords： aerobic oxidation     base-free     5-hydroxymethyl-2-furfural     Pt nanoparticle     thermoresponsive block copolymer    

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Influence of the filler materials on flux-free brazing of pure aluminium (1050)

Kirsten BOBZIN, Lidong ZHAO, Thomas SCHLAEFER, Thomas WARDA,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 1,   Pages 47-51 doi: 10.1007/s11465-009-0079-9

Abstract: Al7Si, Al12Si-4%Cu, and the Al-Si-based filler material A, which was especially developed for flux-free

Keywords： aluminium     flux-free brazing     cold spraying     shear strength    

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New perspectives in free nitrous acid (FNA) uses for sustainable wastewater management

Frontiers of Environmental Science & Engineering 2023, Volume 18, Issue 2, doi: 10.1007/s11783-024-1786-5

Abstract:

● The historical development of free nitrous acid (FNA) technologies

Keywords： Free nitrous acid     Acid-tolerant ammonia oxidizer     In situ generation     Wastewater management    

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Highly selective detection of copper(II) by a “ligand-free” conjugated copolymer in nucleophilic solvents

Weixing Deng, Pengfei Sun, Quli Fan, Lei Zhang, Tsuyoshi Minami

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 1,   Pages 105-111 doi: 10.1007/s11705-019-1791-6

Abstract: The synthesis of -cyclohexyl carbamate-attached fluorene- -phenylene copolymer (PFPNCC) and the useof PFPNCC as a “ligand-free” fluorescent chemosensor for Cu(II) are described.highly selective conjugated polymer-based chemosensors for various target analytes, albeit “ligand-free

Keywords： ligand-free     fluorescent chemosensor     copper     photo-induced electron transfer    

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Ionically Imprinting-Based Copper (Ⅱ) Label-Free Detection for Preventing Hearing Loss Article

Huan Wang, Hui Zhang, Xiaoli Zhang, Hong Chen, Ling Lu, Renjie Chai

Engineering doi: 10.1016/j.eng.2023.09.001

Abstract: solution, IIHBs recognize Cu2+ and exhibit a reflective peak change, thereby achieving label-free

Keywords： Structural color     Microfluidics Ionic imprinting     Label-free detection     Hearing loss    

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Solvent-free mechanochemical mild oxidation method to enhance adsorption properties of chitosan

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1416-4

Abstract:

• Solvent-free chitosan oxidation is obtained by rapid mechanochemical

Keywords： Chitosan     High energy ball milling     Mechanochemistry     Oxidation    

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Design approach for single piston hydraulic free piston diesel engines

Wei WU, Shihua YUAN, Jibin HU, Chongbo JING,

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 4,   Pages 371-378 doi: 10.1007/s11465-009-0069-y

Abstract: The operating characteristics of a single piston hydraulic free piston diesel engine differ significantly

Keywords： free piston engine (FPE)     diesel engine     hydraulic equipment     simulation     experiment    

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Title Author Date Type Operation

Insights into the Organotemplate-Free Synthesis of Zeolite Catalysts

Yeqing Wang,Qinming Wu,Xiangju Meng,Feng-Shou Xiao

Journal Article

Template-free synthesis of hierarchically macro-mesoporous Mn-TiO

Zhao Peng, Li-Hua Chen, Ming-Hui Sun, Pan Wu, Chang Cai, Zhao Deng, Yu Li, Wei-Hong Zheng, Bao-Lian Su

Journal Article

Nitrogen-doped graphene approach to enhance the performance of a membraneless enzymatic biofuel cell

Alireza AHMADIAN YAZDI, Jie XU

Journal Article

Ultrasound-assisted co-precipitation synthesis of mesoporous Co3O4–CeO2 composite oxides for highly selective

Journal Article

Cell-free systems in the new age of synthetic biology

Fernando Villarreal,Cheemeng Tan

Journal Article

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

Journal Article

Hollow carbon spheres and their noble metal-free hybrids in catalysis

Journal Article

Decontamination of Cr(VI) facilitated formation of persistent free radicals on rice husk derived biochar

Kaikai Zhang, Peng Sun, Yanrong Zhang

Journal Article

Thermoresponsive block copolymer supported Pt nanocatalysts for base-free aerobic oxidation of 5-hydroxymethyl

Journal Article

Influence of the filler materials on flux-free brazing of pure aluminium (1050)

Kirsten BOBZIN, Lidong ZHAO, Thomas SCHLAEFER, Thomas WARDA,

Journal Article

New perspectives in free nitrous acid (FNA) uses for sustainable wastewater management

Journal Article

Highly selective detection of copper(II) by a “ligand-free” conjugated copolymer in nucleophilic solvents

Weixing Deng, Pengfei Sun, Quli Fan, Lei Zhang, Tsuyoshi Minami

Journal Article

Ionically Imprinting-Based Copper (Ⅱ) Label-Free Detection for Preventing Hearing Loss

Huan Wang, Hui Zhang, Xiaoli Zhang, Hong Chen, Ling Lu, Renjie Chai

Journal Article

Solvent-free mechanochemical mild oxidation method to enhance adsorption properties of chitosan

Journal Article

Design approach for single piston hydraulic free piston diesel engines

Wei WU, Shihua YUAN, Jibin HU, Chongbo JING,

Journal Article