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Time of flight improved thermally grown oxide thickness measurement with terahertz spectroscopy

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0705-3

Abstract: However, the invisibility of ceramic/thermally grown oxide (TGO) reflective wave leads to the measurement

Keywords： thermal barrier coatings     thermally grown oxide     terahertz spectroscopy     time of flight    

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Effect of TGO on the tensile failure behavior of thermal barrier coatings

Le WANG, Yuelan DI, Ying LIU, Haidou WANG, Haoxing YOU, Tao LIU

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 4,   Pages 452-460 doi: 10.1007/s11465-019-0541-2

Abstract: Thermally grown oxide (TGO) may be generated in thermal barrier coatings (TBCs) after high-temperature

Keywords： thermally grown oxides     thermal barrier coatings     acoustic emission technology     digital image correlation    

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Electrochemical performance of thermally-grown SiO

X. D. HUANG, X. F. GAN, Q. A. HUANG, J. Z. YANG

Frontiers in Energy 2018, Volume 12, Issue 2,   Pages 225-232 doi: 10.1007/s11708-018-0556-0

Abstract: Direct integration of lithium-ion battery (LIB) with electronic devices on the same Si substrate can significantly miniaturize autonomous micro systems. For achieving direct integration, a barrier layer is essential to be inserted between LIB and the substrate for blocking Li diffusion. In this paper, the feasibility of thermal SiO film as the barrier layer is investigated by electrochemical characterization and X-ray photoelectron spectroscopy (XPS). Due to the negligible side reactions of thermal SiO with electrolyte, the solid electrolyte interphase (SEI) layer formed on the surface of the barrier layer is thin and the SEI content mainly consists of hydrocarbon together with slight polyethylene oxide (PEO), Li PO F , and Li CO . Although 8-nm thermal SiO effectively prevents the substrate from alloying with Li , the whole film changes to Li silicate after electrochemical cycling due to the irreversible chemical reactions of SiO with electrolyte. This degrades the performance of the barrier layer against the electrolyte penetration, thus leading to the existence of Li (in the form of F-Si-Li) and solvent decompositions (with the products of hydrocarbon and PEO) near the barrier layer/substrate interface. Moreover, it is found that the reaction kinetics of thermal SiO with electrolyte decrease significantly with increasing the SiO thickness and no reactions are found in the bulk of the 30-nm SiO film. Therefore, thermal SiO with an appropriate thickness is a promising barrier layer for direct integration.

Keywords： autonomous micro system     direct integration     barrier layer     thermal SiO2 film     X-ray photoelectron spectroscopy (XPS)    

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Oxygen-deficient MoO/NiS heterostructure grown on nickel foam as efficient and durable self-supported

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 4,   Pages 437-448 doi: 10.1007/s11705-022-2228-1

Abstract: High-performance and ultra-durable electrocatalysts are vital for hydrogen evolution reaction (HER) during water splitting. Herein, by one-pot solvothermal method, MoOx/Ni3S2 spheres comprising Ni3S2 nanoparticles inside and oxygen-deficient amorphous MoOx outside in situ grow on Ni foam (NF), to assembly the heterostructure composites of MoOx/Ni3S2/NF. By adjusting volume ratio of the solvents of ethanol to water, the optimized MoOx/Ni3S2/NF-11 exhibits the best HER performance, requiring an extremely low overpotential of 76 mV to achieve the current density of 10 mA∙cm‒2 (η10 = 76 mV) and an ultra-small Tafel slope of 46 mV∙dec‒1 in 0.5 mol∙L‒1 H2SO4. More importantly, the catalyst shows prominent high catalytic stability for HER (> 100 h). The acid-resistant MoOx wraps the inside Ni3S2/NF to ensure the high stability of the catalyst under acidic conditions. Density functional theory calculations confirm that the existing oxygen vacancy and MoOx/Ni3S2 heterostructure are both beneficial to the reduced Gibbs free energy of hydrogen adsorption (|∆GH*|) over Mo sites, which act as main active sites. The heterostructure effectively decreases the formation energy of O vacancy, leading to surface reconstruction of the catalyst, further improving HER performance. The MoOx/Ni3S2/NF is promising to serve as a highly effective and durable electrocatalyst toward HER.

Keywords： molybdenum oxides     oxygen vacancies     heterostructure     electrocatalysts     hydrogen evolution reaction    

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COMPARISON OF POMELO (CITRUS MAXIMA) GROWN IN CHINA AND THAILAND

Frontiers of Agricultural Science and Engineering 2021, Volume 8, Issue 2,

Abstract:

Pomelo is a member of the genus Citrus that is a key contributor to the breeding of modern citrus cultivars. China is the largest producer of pomelo and one of the top five pomelo exporting countries. Pomelos from Thailand are also well-known for their excellent quality and flavor and are ranked in the top ten export countries. This review introduces pomelo planting locations and conditions in China and Thailand. The characteristics and qualities of some commercial pomelo cultivars in China and Thailand are summarized to introduce them to international consumers and to document their similarities and dissimilarities. Data on bioactive compounds and antioxidant capacity are also included for most Chinese and Thai pomelos to highlight how they differ in this aspect because consumers are increasingly interested in healthier foods. In addition, the sensory perception in terms of aroma, flavor, texture and taste attributes and consumer perspective and preferences are discussed.

 

Keywords： climate / commercial cultivars / fruit characteristics / lycopene / naringin / sensory evaluation    

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Catalytic combustion of volatile organic compounds using perovskite oxides catalysts—a review

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 11,   Pages 1649-1676 doi: 10.1007/s11705-023-2324-x

Abstract: Next, the characteristics and catalytic performance of perovskite oxides as catalysts for VOC removalThe challenges and the prospects regarding the design of perovskite oxides catalysts for the catalytic

Keywords： perovskite oxides     volatile organic compounds     catalytic combustion     reaction mechanism    

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Poly(vinylidene fluoride--hexafluoro propylene) membranes prepared via thermally induced phase separation

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 5,   Pages 720-730 doi: 10.1007/s11705-021-2098-y

Abstract: citrate, was employed to prepare poly(vinylidene fluoride)-co-hexafluoropropylene membranes via thermally

Keywords： poly(vinylidene fluoride)-co-hexafluoropropylene     thermally induced phase separation     non-toxic    

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Multivalent manganese oxides with high electrocatalytic activity for oxygen reduction reaction

Xiangfeng Peng, Zhenhai Wang, Zhao Wang, Yunxiang Pan

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 4,   Pages 790-797 doi: 10.1007/s11705-018-1706-y

Abstract: A noble-metal-free catalyst based on both Mn O and MnO was prepared by using the dielectric barrier discharge technique at moderate temperature. The prepared catalyst shows a higher electrocatalytic activity towards the oxygen reduction reaction than the catalyst prepared by using the traditional calcination process. The enhanced activity could be due to the coexistence of manganese ions with different valences, the higher oxygen adsorption capacity, and the suppressed aggregation of the catalyst nanoparticles at moderate temperature. The present work would open a new way to prepare low-cost and noble-metal-free catalysts at moderate temperature for more efficient electrocatalysis.

Keywords： oxygen reduction reaction     manganese oxides     mixed valences of manganese     oxygen adsorption     dielectric barrier    

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Redox reactions of iron and manganese oxides in complex systems

Jianzhi Huang, Huichun Zhang

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 5, doi: 10.1007/s11783-020-1255-8

Abstract: • Mechanisms of redox reactions of Fe- and Mn-oxides were discussed. • Oxidative reactions of Mn- andFe-oxides in complex systems were reviewed. • Reductive reaction of Fe(II)/iron oxides in complex systemsConspectus Redox reactions of Fe- and Mn-oxides play important roles in the fate and transformationreductive reactivity of Fe(II)/iron oxides in complex model systems toward contaminant degradation.such as Al, Si and Ti oxides on the redox reactivity of the systems are briefly summarized.

Keywords： Iron oxides     manganese oxides     reduction     oxidation     complex systems     reaction kinetics and mechanisms    

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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: Manganese oxides (MnOx) have been demonstrated to be effective materials to activate Oxone (i.e., PMS

Keywords： Peroxymonosulfate     Manganese oxides     Catalyst     Oxidant    

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Comparison of human nasal epithelial cells grown as explant outgrowth cultures or dissociated tissue

Jian Jiao, Na Meng, Hong Wang, Luo Zhang

Frontiers of Medicine 2013, Volume 7, Issue 4,   Pages 486-491 doi: 10.1007/s11684-013-0287-x

Abstract:

The purpose of this study was to compare cell growth characteristics, ciliated cell differentiation, and function of human nasal epithelial cells established as explant outgrowth cultures or dissociated tissue cultures. Human nasal mucosa of the uncinate process was obtained by endoscopy and epithelial cell cultures were established by explant outgrowth or dissociated tissue culture methods. Epithelial cell growth characteristics were observed by inverted phase contrast microscopy. Ciliated cell differentiation was detected by β-tubulin IV and ZO-1 immunocytochemistry. Basal and ATP-stimulated ciliary beat frequency (CBF) was measured using a high-speed digital microscopic imaging system. Both the explant and dissociated tissue cultures established as monolayers with tight junctions and differentiated cell composition, with both types of cultures comprising ciliated and non-ciliated epithelial cells. Fibroblasts were also frequently found in explant cultures but rarely seen in dissociated tissue cultures. In both culture systems, the highest ciliated cell density appeared at 7th–10th culture day and declined with time, with the lifespan of ciliated cells ranging from 14 to 21 days. Overall, 10% of the cells in explant cultures and 20% of the cells in the dissociated tissue cultures were ciliated. These two cultures demonstrated similar ciliary beat frequency values at baseline (7.78±1.99 Hz and 7.91±2.52 Hz, respectively) and reacted equivalently following stimulation with 100 μM ATP. The results of this study indicate that both the explant outgrowth and dissociated tissue culture techniques are suitable for growing well-differentiated nasal ciliated and non-ciliated cells, which have growth characteristics and ciliary activity similar to those of nasal epithelial cells in vivo.

Keywords： ciliated cells     ciliary beat frequency     dissociated tissue culture     explant culture     nasal epithelial cells    

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Oxidative treatment of aqueous monochlorobenzene with thermally-activated persulfate

Qishi LUO

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 2,   Pages 188-194 doi: 10.1007/s11783-013-0544-x

Abstract: The oxidation of aqueous monochlorobenzene (MCB) solutions using thermally- activated persulfate hasThe effective thermally activated persulfate oxidation of MCB in groundwater from a real contaminated

Keywords： persulfate     monochlorobenzene     advanced oxidation process    

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Formation of microporous polymeric membranes via thermally induced phase separation: A review

Min Liu,Shenghui Liu,Zhenliang Xu,Yongming Wei,Hu Yang

Frontiers of Chemical Science and Engineering 2016, Volume 10, Issue 1,   Pages 57-75 doi: 10.1007/s11705-016-1561-7

Abstract: A review of recent research related to microporous polymeric membranes formed via thermally induced phase

Keywords： polymer     microporous membrane     thermally induced phase separation    

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SiO2 passivation layer grown by liquid phase deposition for silicon solar cell application

Yanlin CHEN,Sihua ZHONG,Miao TAN,Wenzhong SHEN

Frontiers in Energy 2017, Volume 11, Issue 1,   Pages 52-59 doi: 10.1007/s11708-016-0429-3

Abstract: In this paper, a comprehensive understanding of the SiO passivation layer grown by liquid phase deposition

Keywords： Si solar cell     passivation     SiO2     liquid phase deposition     carrier lifetime    

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Review on research and application of mesoporous transitional metal oxides in water treatment

Minghao SUI, Lei SHE

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 6,   Pages 795-802 doi: 10.1007/s11783-013-0521-4

Abstract: This paper reviews the application of mesoporous transitional metal oxides in water treatment on basisMesoporous transitional metal oxides are characterized by their intrinsic features, such as a high surface

Keywords： mesoporous materials     transitional metal oxides     catalysis     adsorption     water treatment    

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Title Author Date Type Operation

Time of flight improved thermally grown oxide thickness measurement with terahertz spectroscopy

Journal Article

Effect of TGO on the tensile failure behavior of thermal barrier coatings

Le WANG, Yuelan DI, Ying LIU, Haidou WANG, Haoxing YOU, Tao LIU

Journal Article

Electrochemical performance of thermally-grown SiO

X. D. HUANG, X. F. GAN, Q. A. HUANG, J. Z. YANG

Journal Article

Oxygen-deficient MoO/NiS heterostructure grown on nickel foam as efficient and durable self-supported

Journal Article

COMPARISON OF POMELO (CITRUS MAXIMA) GROWN IN CHINA AND THAILAND

Journal Article

Catalytic combustion of volatile organic compounds using perovskite oxides catalysts—a review

Journal Article

Poly(vinylidene fluoride--hexafluoro propylene) membranes prepared via thermally induced phase separation

Journal Article

Multivalent manganese oxides with high electrocatalytic activity for oxygen reduction reaction

Xiangfeng Peng, Zhenhai Wang, Zhao Wang, Yunxiang Pan

Journal Article

Redox reactions of iron and manganese oxides in complex systems

Jianzhi Huang, Huichun Zhang

Journal Article

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

Jianzhi Huang, Huichun Zhang

Journal Article

Comparison of human nasal epithelial cells grown as explant outgrowth cultures or dissociated tissue

Jian Jiao, Na Meng, Hong Wang, Luo Zhang

Journal Article

Oxidative treatment of aqueous monochlorobenzene with thermally-activated persulfate

Qishi LUO

Journal Article

Formation of microporous polymeric membranes via thermally induced phase separation: A review

Min Liu,Shenghui Liu,Zhenliang Xu,Yongming Wei,Hu Yang

Journal Article

SiO2 passivation layer grown by liquid phase deposition for silicon solar cell application

Yanlin CHEN,Sihua ZHONG,Miao TAN,Wenzhong SHEN

Journal Article

Review on research and application of mesoporous transitional metal oxides in water treatment

Minghao SUI, Lei SHE

Journal Article