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Nano Research 2024年第9期17卷 7824-7829页

作者： Aijing Ma jianzhou gui Yanmei Huang Yifu Yu State Key Laboratory of Separation Membranes and Membrane Processes Tianjin Key Laboratory of Green Chemical Technology and Process EngineeringSchool of Chemical Engineering and TechnologyTiangong UniversityTianjin 300387China Institute of Molecular Plus School of Chemical EngineeringTianjin UniversityTianjin 300072China

Ammonia plays a vital role in present agriculture and industry,and is also regarded as a next-generation clean energy *** development of electrocatalysis raises an opportunity to make ammonia synthesis compatible with intermittent and variable renewable energy sources such as solar and wind ***,the direct ammonia electrosynthesis from N_(2)reduction is still challenging due to the much easier hydrogen evolution competition *** this perspective,we propose a novel strategy for ammonia electrosynthesis from air and water based on the coupling of anodic nitrogen oxidation and cathodic nitrate *** methods for breaking the bottlenecks of anodic nitrogen oxidation and cathodic nitrate reduction are discussed *** that,key issues that need to be considered in the coupled system are proposed for the application of this strategy.

关键词： electrocatalysis nitrogen oxidation nitrate reduction nitrogen fixation ammonia synthesis

Reduced Graphene Oxide/Carbon Fiber Composite Membrane for Self-floating Solar-thermal Steam Production

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Chemical Research in Chinese Universities 2020年第4期36卷 699-702页

作者： MA Aijing CHEN Yaxi LIU Yang gui jianzhou YU Yifu State Key Laboratory of Separation Membranes and Membrane Processes Tianjin Key Laboratory of Green Chemical Technology and Process EngineeringSchool of Chemistry&Chemical EngineeringTiangong UniversityTianjin 300387P.R.China Institute of Molecular Plus Tianjin UniversityTianjin 300072P.R.China Analysis and Testing Center Tianjin UniversityTianjin 300072P.R.China

Solar-thermal water evaporation has attracted increasing attention owing to the promising potential to solve the global clean water and energy ***,the development of this strategy is limited by the lack of materials with high solar-thernal conversion efficiency,local heating of superficial water,easy preparation and low ***,we proposed a facile strategy to prepare a reduced graphene oxide/carbon fiber composite membrane,denoted as RGO/CF *** surface of the RGO/CF membrane was highly hydrophobic,endowing the composite membrane with the self-floating ability on the water without any *** light absorbance ability achieved as high as ca.98%in the wavelength range of 300-1200 *** steam evaporation efliciency under the illumination of3-sun was 97%,generating water steam at a rate of 4.54 kg·m^-2·h^-***,the solar-thermal steam production rate showed high stability during successive 30 cvcle tests.

关键词： Composite membrane Reduced graphene oxide:Carbon fiber Self-floating Solar steam generation

Rational design of efficient visible-light photocatalysts(1D@2D/0D)ZnO@Ni-doped BiOBr/Bi heterojunction:Considerations on hierarchical structures,doping and SPR effect

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Journal of Materials Science & Technology 2022年第30期125卷 38-50页

作者： Zhouzheng Jin Jingru Li Yiming Zhang Dan Liu Hui Ding Bhekie B.Mamba Alex T.Kuvarega jianzhou gui State Key Laboratory of Separation Membranes and Membrane Processes Tianjin Key Laboratory of Green Chemical Technology and Process Engineeringand School of Material Science and EngineeringTiangong UniversityTianjin 300387China School of Chemical Engineering and Technology Tiangong UniversityTianjin 300387China School of Chemistry Tiangong UniversityTianjin 300387China School of Environmental Science and Engineering Tianjin UniversityTianjin300072China University of South Africa College of ScienceEngineering and TechnologyNanotechnology and Water Sustainability Research UnitFlorida Science Campus 1710South Africa

Simultaneously integrating heterogeneous interface,element doping,and metal decorating was a promising strategy to promote the visible-light-driven photocatalytic ***,we demonstrated a facile solvothermal route for Ni-doped BiOBr/Bi^(0) with ZnO 3D hierarchical heterojunction(denoted as Z@B/BiNi).The optimal photocatalysts of Z@B/Bi-Ni sample presented a remarkable catalytic performance of high concentrations of tetracycline solution(40 mg/L)than those of the Z@B/Bi,Z@B,BOB and ZnO photocatalysts toward the visible-light-driven *** enhanced photocatalytic mechanism can be proposed as follows:(ⅰ)3D hierarchical heterojunction provided more active sites and accelerated the separation of charge carriers for photocatalytic TC;(ⅱ)formation of oxygen vacancies on the surface over Z@B/Bi-Ni by in-situ reduction of Bi^(0) and Ni doping could serve as the active sites for oxygen activation to adsorb free O_(2) and generate more superoxide radicals;(ⅲ)SPR effect of Bi metal were beneficial to carrier separation and also act as the active site to trap O_(2) *** work clarified the role of unique morphologies,surface plasmonic resonance(SPR)effect of metal Bi,and Ni doping in Z@B/Bi-Ni,and its photocatalytic reaction mechanism was proposed by a series of experiments,characterization and DFT calculations,arousing a new perspective to design hierarchical heterojunction photocatalysts.

关键词： Hierarchical heterojunction Oxygen vacancies Doping Ni SPR effect Photocatalysis

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氧化物Zeta电位影响因素研究进展

中外能源 2024年第6期29卷 72-84页

作者：郭佳林焦阳史建公苏海霞桂建舟刘丹张毅天津工业大学化学工程与技术学院天津300382 中国石化催化剂有限公司工程技术研究院北京101111 中国石化催化剂有限公司北京100176

文章主要探究了氧化物和过氧化物在固-液界面Zeta电位的影响因素,以及Zeta电位在颗粒悬浮液和液-液乳状液中的重要性。介绍了测定Zeta电位的方法和相关实验研究成果,包括表面活性剂、pH值、离子强度等因素对Zeta电位的影响。实验结果表... 详细信息

文章主要探究了氧化物和过氧化物在固-液界面Zeta电位的影响因素,以及Zeta电位在颗粒悬浮液和液-液乳状液中的重要性。介绍了测定Zeta电位的方法和相关实验研究成果,包括表面活性剂、pH值、离子强度等因素对Zeta电位的影响。实验结果表明,pH值是影响Zeta电位的显著因素之一,与颗粒表面电荷分布紧密相关。不同的研究指出,通过控制pH值,可以显著改变如ZnO、TiO_(2)、CeO_(2)等材料表面的Zeta电位,进而影响在液体介质中的稳定性。表面活性剂的种类和浓度同样对Zeta电位有显著影响,通过选择适当的表面活性剂,可以有效调节悬浮液的稳定性。粒径和浓度的不同也会影响Zeta电位,粒径对电荷密度和电势分布有显著影响,对颗粒悬浮液的稳定性也至关重要。同样温度对表面或界面反应也对Zeta电位有影响,如官能团的解离和质子化及吸附过程。

关键词： Zeta电位固-液界面氧化物的Zeta电位金属氧化物

Apparent Kinetics of 1-Decene Polymerization Catalyzed Using the Ionic Liquid[Bmim]_(x)[C_(2)H_(5)NH_(3)]_(1-x)[Al_(2)Cl_(7)]

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China Petroleum Processing & Petrochemical Technology 2023年第4期25卷 16-22页

作者： Chen Yingze He Jinxue Wang Ben Pan Shiguang Zhang Di Bai Zhongxiang An Liangcheng Liu Dan Ma Aijing Li Hu gui jianzhou State Key Laboratory of Separation Membranes and Membrane Processes Tianjin Key Laboratory of Green Chemical Technology and Process Engineeringand School of Chemical Engineering and TechnologyTiangong UniversityTianjin 300387China School of Material Science and Engineering Tiangong UniversityTianjin 300387China Ningxia Coal Industry Co.Ltd. CHN ENERGYYinchuan 750011China School of Chemistry Tiangong UniversityTianjin 300387China

Poly-α-olefin(PAO)synthetic oil,a regular long-chain alkane produced from the catalytic polymerization ofα-olefin,is a high-quality lubricating base oil with huge market *** this study,PAO synthesis based on the catalytic polymerization of 1-decene using the ionic liquid(IL)[Bmim]_(x)[C_(2)H_(5)NH_(3)]_(1-x)[Al_(2)Cl_(7)]as the catalyst was *** with the conventional catalyst[Bmim][Al_(2)Cl_(7)],the obtained PAO product incorporates more trimers and tetramers of 1-decene and contains few double-bond end groups,demonstrating a better catalytic system for PAO-10 *** apparent polymerization kinetics of 1-decene in this catalytic system were studied based on the 1-decene concentration,catalyst concentration,and reaction *** apparent kinetic equation for PAO formation was determined,providing a promising strategy for PAO production using 1-decene polymerization.

关键词： poly-α-olefin 1-decene ionic liquid apparent kinetics catalytic polymerization

丙烯气相直接氧化制环氧丙烷铜基催化剂研究进展

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中外能源 2024年第3期29卷 67-76页

作者：高海洋焦阳史建公张毅苑志伟桂建舟刘丹郭玉高天津工业大学化学工程与技术学院天津300382 中国石化催化剂有限公司北京100029 中国石化催化剂有限公司工程技术研究院北京101111

环氧丙烷(PO)作为一种用途广泛的有机化合物原料,主要用于合成聚氨酯塑料。聚氨酯塑料因其卓越的弹性、耐久性和多样性,在许多日用品及工业产品中发挥着重要作用。传统的环氧丙烷生产方法常常步骤繁琐并且效率不高,因此科学界持续寻找... 详细信息

环氧丙烷(PO)作为一种用途广泛的有机化合物原料,主要用于合成聚氨酯塑料。聚氨酯塑料因其卓越的弹性、耐久性和多样性,在许多日用品及工业产品中发挥着重要作用。传统的环氧丙烷生产方法常常步骤繁琐并且效率不高,因此科学界持续寻找更为简洁和环保的合成路径。近年来,通过利用分子氧直接环氧化丙烯来合成环氧丙烷的技术引起了人们广泛的兴趣,因为这种方法有望简化生产流程,同时减少有害副产品的生成。通过介绍不同形貌(八面体、立方体、纳米管、纳米棒等)、不同粒径氧化亚铜的调节和制备方法,讨论催化性能的影响因素,例如氧化亚铜的形貌、载体、粒径等,探索不同元素(卤族元素、碱土金属等)掺杂对氧化亚铜催化性能的不同作用方式。在论述这些实验观察和结果的基础上,通过进一步讨论丙烯环氧化反应的可能机理和途径,针对环氧化反应提供详细的分子水平的视角。通过这项研究,希望能够更有效地设计催化剂,优化制备过程,并为环氧丙烷的绿色生产作出贡献,推动聚氨酯塑料行业的可持续发展。

关键词：催化剂丙烯环氧丙烷直接氧化法氧化亚铜

Subcritical ethanol extraction of flavonoids from moringa oleifera leaf and evaluation of antioxidant activity

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Subcritical ethanol extraction of flavonoids from moringa ol...

A new twist to the interplay between superconductivity and Kondo correlation

首届中国亚临界生物萃取技术发展论坛

作者： Yongqiang Wang Yujie Gao Hui Ding Shejiang Liu Xu Han jianzhou gui Dan Liu School of Chemical Engineering and Technology Tianjin University Tianjin Academy of Environmental Sciences Tianjin United Environmental Engineering Design Company Limited School of Environmental Science and Engineering Tianjin University School of Environmental and Chemical Engineering Tianjin Polytechnic University

A large-scale process to extract flavonoids from moringa oleifera leaf by subcritical ethanol was developed and HPLC-MS analysis was conducted to qualitatively identify the compounds in the extracts. To optimize the effects of process parameters on the yield of flavonoids, a Box-Behnken design combined with response surface methodology was conducted in the present work. The results indicated that the highest extraction yield of flavonoids by subcritical ethanol extraction could reach 2.60% using 70% ethanol at 126.6 °C for 2.05 h extraction. Under the optimized conditions,flavonoids yield was substantially improved by 26.7% compared with the traditional ethanol reflux method while the extraction time was only 2 h, and obvious energy saving was observed. FRAP and DPPH· assays showed that the extracts had strong antioxidant and free radical scavenging activities.

关键词： Response surface methodology Flavonoids Moringa oleifera leaf Subcritical ethanol extraction Antioxidant property

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Science China(Physics,Mechanics & Astronomy) 2024年第8期67卷 1-2页

作者： gui-Lu Long Department of Physics Tsinghua UniversityBeijing 100084China Beijing Academy of Quantum Information Sciences Beijing 100193China

Recently,Deng et al.[1] found a new twist to the intriguing physics resulting from the interplay between Kondo correlation and *** correlation [2,3] and superconductivity [4,5] are two fundamental phenomena in condens... 详细信息

关键词： Kondo twist

Study on Effectiveness of Solitary-Wave-Like Form Based on Overtopping Data from Irregular Wave Tests

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China Ocean Engineering 2024年第4期38卷 701-710页

作者： LI Xiao-liang Huang gui-biao School of Naval Architecture&Ocean Engineering Jiangsu University of Science and TechnologyZhenjiang 212100China

The previous study conducted by Li(2022)demonstrates that the Goda graph can be adequately represented by a solitary-wave-like form across the entire range of relative water depth,with the exception of the extremely shallow ***,it remains uncertain whether this form is equally effective when applied to test data generated by irregular waves,as the Goda graph was initially developed based on overtopping data from regular wave ***,it is unclear whether this form is suitable for formulating overtopping discharge at composite vertical *** order to address these questions,a 2D overtopping experiment was conducted,incorporating both simple and composite types of vertical walls,with various relative water depths across the entire range,excluding the extremely shallow zone.A novel analysis procedure was developed,which proved to be highly productive and can be considered a general method for data ***,the study yielded two conclusions:(1)the solitary-wave-like form is remarkably effective in formulating overtopping test data generated by irregular waves,regardless of whether the vertical wall is simple or composite,and(2)the resulting formulas exhibit definitely better performance compared with existing formulas.

关键词： solitary-wave-like form overtopping discharge overtopping formula vertical wall

Numerical investigation and modeling of sweep effects on inlet flow field of axial compressor cascades

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Chinese Journal of Aeronautics 2024年第2期37卷 296-308页

作者： Jiancheng ZHANG Donghai JIN Xingmin gui School of Energy and Power Engineering Beihang UniversityBeijing 100191China Jiangxi Research Institue of Beihang University Nanchang 330096China

Swept blades are widely utilized in transonic compressors/fans and provide high load,high through-flow,high efficiency,and adequate stall ***,there is limited quantitative research on the mechanism of the effect of swept blades on the flow field,resulting in a lack of direct quantitative guidance for the design and analysis of swept blades in fans/*** better understand this mechanism,this study employs a reduced-dimensional force equilibrium method to analyze more than 1500 swept cascades *** verify that circumferential fluctuation terms are responsible for inducing radial migration in the inlet airflow field of the swept blade,resulting in variations in the incidence angle and consequently leading to changes in the characteristics of the swept ***,a combination of simple functions and machine learning is utilized to model the circumferential fluctuation terms and quantify the sweep *** prediction accuracy of the model is high,with coefficient of determination greater than 0.95 on the test *** the model is applied in a meridional flow analysis program,the calculation accuracy of the program for the incidence angle is improved by 0.4°and 0.6°at the design and off-design conditions respectively,compensating for the program’s original ***,the model can also provide quantitative guidance for the design of swept blades,thereby reducing the number of design iterations and improving design efficiency.

关键词： Turbomachinery Sweep aerodynamics Quasi-3D method Incidence angle Circumferential fluctuation Machine learning