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Conference on Lasers and Electro-Optics (CLEO)

作者： Feilou Wang Guangzhou Geng Xueqian Wang Junjie Li Yang Bai Jianqiang Li Yongzheng Wen Bo Li Jingbo Sun Ji Zhou School of Materials Science and Engineering State Key Laboratory of New Ceramics and Fine Processing Tsinghua University Beijing China Institute of Physics Beijing National Laboratory for Condensed Matter Physics Chinese Academy of Sciences Beijing China Institute for Advanced Materials and Technology Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology Beijing Beijing China Institute of Process Engineering CAS Key Laboratory of Green Process and Engineering National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology Chinese Academy of Sciences Beijing China Tsinghua Shenzhen International Graduate School Shenzhen China

We used the backpropagation neural network to design a high performance achromatic metalens at visible range. Experimental demonstration showed that the fabricated achromatic metalens can operate from 420 to 640 nm wi... 详细信息

ISBN: (数字)9781957171050

ISBN: (纸本)9781665466660

关键词： Backpropagation Artificial neural networks Lasers and electrooptics Broadband communication Electrooptical waveguides

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Efficient sequential harvesting of solar light by heterogeneous hollow shells with hierarchical pores

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National Science Review 2020年第11期7卷 1638-1646页

作者： Yanze Wei Jiawei Wan Nailiang Yang Yu Yang Yanwen Ma Songcan Wang Jiangyan Wang Ranbo Yu Lin Gu Lianhui Wang Lianzhou Wang Wei Huang Dan Wang State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Department of Physical Chemistry School of Metallurgical and Ecological EngineeringUniversity of Science and Technology Beijing University of Chinese Academy of Sciences Chinese Academy of Sciences School of Materials Science and Engineering Nanjing University of Posts and Telecommunications School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology The University of Queensland Department of Materials Science andEngineering Stanford University Institute of Physics Chinese Academy of Sciences

In nature, sequential harvesting of light widely exists in the old life entity, i.e. cyanobacteria, to maximize the light absorption and enhance the photosynthesis efficiency. Inspired by nature, we propose a brand new concept of temporally-spatially sequential harvesting of light in one single particle, which has purpose-designed heterogeneous hollow multi-shelled structures (HoMSs) with porous shells composed of nanoparticle subunits. Structurally, Ho MSs consist of different band-gap materials outside-in, thus realizing the efficient harvesting of light with different wavelengths. Moreover, introducing oxygen vacancies into each nanoparticle subunit can also enhance the light absorption. With the benefit of sequential harvesting of light in Ho MSs, the quantum efficiency at wavelength of 400 nm is enhanced by six times compared with the corresponding nanoparticles. Impressively, using these aforementioned materials as photocatalysts,highly efficient photocatalytic water splitting is realized, which cannot be achieved by using the nanoparticle counterparts. This new concept of temporally-spatially sequential harvesting of solar light paves the way for solving the ever-growing energy demand.

关键词： light harvesting hollow structures multi-shelled solar energy conversion

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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

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Plasma Induced Rich Oxygen Vacancies Fiber-Like Zno for Efficient Photocatalytic Co2 Reduction

SSRN

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SSRN 2022年

作者： Xiaohong, Ma Danyang, Li Liu, Chang Yang, Zongxian Qi, Jian Bai, Liuyang Feifei, You Fangli, Yuan State Key Laboratory of Multi-phase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China University of Chinese Academy of Sciences Beijing100049 China College of Textile and Clothing Yancheng Institute of Technology Yancheng224051 China State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China Industry Innovation & Research and Development Institute of Zhumadian Huanghuai University Zhumadian463000 China Beijing100049 China

Photoreduction CO 2 to value-added fuels (CO, CH 4 , etc.) driven by solar energy gives a green way for managing the global carbon balance. Through the radio-frequency thermal plasma treatment, fiber-like structured ZnO with rich oxygen defects were successfully designed and synthesized. The inherent one-dimensional structure enabled itself avoid aggregation during performance evolution within the humid environment and shorten the transfer path length of the photo-induced carriers and promote more electron/hole to migration to the surface of the photocatalyst. Besides, the rich oxygen vacancies could not only hinder the recombination of photo-generated electron/hole pairs, but also broaden the light absorption spectrum. Therefore, when applied in CO 2 photoreduction, the optimal fiber-like ZnO with rich oxygen defects catalyst behaved outstanding photocatalytic performance with a CO 2 -to-CO rate of 15.84 μmol g - 1 h - 1 . © 2022, The Authors. All rights reserved.

关键词： Zinc oxide

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Simultaneous extraction of gold and zinc from refractory carbonaceous gold ore by chlorination roasting process

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Transactions of Nonferrous Metals Society of China 2020年第4期30卷 1111-1123页

作者： Hong-jun WANG Ya-li FENG Hao-ran LI Jin-xing KANG School of Civil and Resources Engineering University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China

A novel process based on chlorination roasting was proposed to simultaneously recover gold and zinc from refractory carbonaceous gold ore by using NaCl as chlorination *** effects of roasting temperature,roasting time and NaCl content on the volatilization rates of gold and zinc were *** reaction mechanism and the phase transition process were also analyzed by means of SEM,EDS and *** results demonstrated that under the optimal conditions of NaCl content of 10%,roasting temperature of 800℃,roasting time of 4 h and gas flow rate of 1 L/min,the rates of gold and zinc were 92%and 92.56%,*** low-temperature chlorination roasting stage,a certain content of sulfur was beneficial to the chlorination reactions of gold and zinc;and during high-temperature chlorination roasting stage,the crystal structure of vanadium-bearing mica was destroyed,and the vanadium-containing oxides were beneficial to the chlorinating volatilization of gold and ***,the chlorinated volatiles of gold and zinc could be recovered by alkaline solution.

关键词： refractory carbonaceous gold ore chlorination roasting thermodynamic calculation gold zinc

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Extraction of valuable metals from Ti-bearing blast furnace slag using ammonium sulfate pressurized pyrolysis−acid leaching processes

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Transactions of Nonferrous Metals Society of China 2020年第10期30卷 2836-2847页

作者： Zhen-zhong BIAN Ya-li FENG Hao-ran LI School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China

A novel method of extracting valuable metals from Ti-bearing blast furnace slag(TBBF slag)via pressure pyrolysis of recyclable ammonium sulfate(AS)−acid leaching process was *** results show that when pressurized roasting at an AS-to-slag mass ratio 3:1 and 370℃for 90 min,the extraction rates of titanium,aluminum and magnesium reached 94.5%,91.9%and 97.4%,*** acid leaching solution was subjected to re-crystallization in a boiling state to obtain a titanium product having a TiO2 content of 94.1%.The above crystallization mother liquor was adjusted to pH=6 and pH≥12.2,respectively,and then qualified Al2O3 and MgO products were *** analysis through XRD and SEM−EDS proves that the main phases in roasted samples were NH4AlSO4,CaSO4 and *** thermodynamic analysis presents that the main minerals of perovskite,spinel and diopside in raw ore could spontaneously react with the intermediate produced by AS under optimal conditions.

关键词： Ti-bearing blast furnace slag ammonium sulfate pressurized pyrolysis high value products

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Corrigendum to ‘Economic and environmental analysis of bio-succinic acid production: From established processes to a new continuous fermentation approach with in-situ electrolytic extraction’ [Chemical engineering Research and Design Volume 179, March 2022, Pages 401–414]

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Chemical engineering Research and Design 2022年 184卷 637-638页

作者： Enrico Mancini Rofice Dickson Serena Fabbri Isuru A. Udugama Humzaa Imtiaz Ullah Srikanth Vishwanath Krist V. Gernaey Jianquan Luo Manuel Pinelo Seyed Soheil Mansouri Department of Chemical and Biochemical Engineering Technical University of Denmark Kgs. Lyngby Denmark Department of Chemistry & Chemical Engineering SBA School of Science and Engineering Lahore University of Management Sciences (LUMS) Lahore 54792 Pakistan Quantitative Sustainability Assessment Group Department of Technology Management and Economics Technical University of Denmark Kgs. Lyngby Denmark Department of Chemical Systems Engineering the University of Tokyo Tokyo Japan State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing China

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Direct numerical simulation of Taylor-Couette flow with vertical asymmetric rough walls

arXiv

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arXiv 2023年

作者： Xu, Fan Su, Jinghong Lan, Bin Zhao, Peng He, Yurong Sun, Chao Wang, Junwu School of Energy Science and Engineering Harbin Institute of Technology Harbin150001 China State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences P. O. Box 353 Beijing100190 China School of Chemical Engineering University of Chinese Academy of Sciences Beijing100049 China Innovation Academy for Green Manufacture Chinese Academy of Sciences Beijing100190 China Center for Combustion Energy Key Laboratory for Thermal Science and Power Engineering Ministry of Education Department of Energy and Power Engineering Tsinghua University Beijing100084 China Department of Engineering Mechanics School of Aerospace Engineering Tsinghua University Beijing100084 China

Direct numerical simulations are performed to explore the effects of the rotating direction of the vertically asymmetric rough wall on the transport properties of Taylor-Couette (TC) flow, up to a Taylor number of Ta = 2.39×107. It is shown that, compared to the smooth wall, the rough wall with vertical asymmetric strips can enhance the dimensionless torque Nuω. More importantly, at high Ta, clockwise rotation of the inner rough wall (where the fluid is sheared by the steeper slope side of the strips) results in a significantly greater torque enhancement compared to counter-clockwise rotation (where the fluid is sheared by the smaller slope side of the strips), due to the larger convective contribution to the angular velocity flux. However, the rotating direction has a negligible effect on the torque at low Ta. The larger torque enhancement caused by the clockwise rotation of the vertically asymmetric rough wall at high Ta is then explained by the stronger coupling between the rough wall and the bulk, attributed to the larger biased azimuthal velocity toward the rough wall at the mid-gap of the TC system, the increased turbulence intensity manifested by larger Reynolds stress and a thinner boundary layer, and the more significant contribution of the pressure force on the surface of the rough wall to the torque. Copyright © 2023, The Authors. All rights reserved.

关键词： Direct numerical simulation

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Cu-loaded C₃N₄-MgO nanorods for promising antibacterial and dye degradation

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Applied Nanoscience (Switzerland) 2022年第8期12卷 2443-2458页

作者： Akbar, M.U. Ikram, M. Imran, M. Haider, A. Ul-Hamid, A. Dilpazir, S. Shahzadi, I. Nazir, G. Shahzadi, A. Nabgan, W. Haider, J. Solar Cell Applications Research Lab Department of Physics Government College University Punjab Lahore 54000 Pakistan State Key Laboratory of Chemical Resource Engineering Beijing Advanced Innovation Centre for Soft Matter Science and Engineering Beijing Engineering Center for Hierarchical Catalysts Beijing University of Chemical Technology Beijing 100029 China Faculty of Veterinary and Animal Sciences Muhammad Nawaz Shareef University of Agriculture Punjab Multan 66000 Pakistan Core Research Facilities King Fahd University of Petroleum and Minerals Dhahran 31261 Saudi Arabia CAS Key Laboratory of Green Process and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing China Punjab University College of Pharmacy University of the Punjab Lahore 54000 Pakistan Department of Nanotechnology and Advanced Materials Engineering Sejong University Seoul 05006 South Korea Faculty of Pharmacy University of the Lahore Lahore Pakistan School of Chemical and Energy Engineering Faculty of Engineering Universiti Teknologi Malaysia Johor Skudai 81310 Malaysia Departament d’Enginyeria Química Universitat Rovira I Virgili Av Països Catalans 26 Tarragona 43007 Spain Tianjin Institute of Industrial Biotechnology Chinese Academy of Sciences Tianjin 300308 China

Photocatalytic and magnetic stability of two-dimensional nanomaterials is enhanced by metal doping, which is an environmentally friendly technique used in various industries. There is an urgent need to discover new antimicrobial compounds or extracts to address the crucial problem of increasing microbial resistance against current antibiotics. Similarliy, the whole world is facing water crisis and a possible cost-effective solution is photocatalysis. In this study, an economical and convenient co-precipitation method was adopted to synthesize copper (Cu) loaded graphitic carbon nitride (g-C₃N₄) and magnesium oxide (MgO) composites. Various concentrations (2.5, 5, 7.5, and 10%) of Cu were doped into a fixed amount of g-C₃N₄/MgO nanostructures for efficient photocatalytic and antimicrobial activities. Results showed that 2.5% Cu loaded samples exhibited best possible results for the photocatalytic activity and 10% loaded Cu nanocomposites displayed enhanced antimicrobial performance. Improved crystallinity and increase in crystal size upon doping were confirmed with X-ray differaction (XRD) analysis, which was corroborated with Selected Area Electron Diffraction (SAED) results. Fourier-transform infrared spectroscopy (FTIR) revealed that MgO spectra consisted of stretching vibrations of Mg-O bond and other functional groups with minor changes in the vibrational modes upon doping. An high resolution transmission electron microscope (HRTEM) fitted with Gatan ® digital software indicated hexagonal phase formation in as-prepared samples and nanorods upon doping, with confirmed d-spacing values. The UV–visible spectroscopy (UV–Vis) analysis exhibited a slight redshift in absorption intensity leading to decreased bandgap (Eg) for Cu-loaded g-C₃N₄/MgO. Photoluminescence (PL) spectra were acquired to investigate the recombination of electron–hole pairs. X-ray photoelectron spectroscopy (XPS) was employed to eva

关键词： Antimicrobial Co-precipitation, g-C3N4, nanorods DSC MgO XPS

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Preparation and Properties of Acid-Resistant Polyimide Ultrafiltration Membranes for Separation of Lignin From Deep Eutectic Solvents

SSRN

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SSRN 2022年

作者： Zhuang, Yongbing Li, Jing Lu, Jian Sang, Haoqi Zhang, Yu Qi, Benkun Luo, Jianquan Wan, Yinhua State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China School of Chemical Engineering University of Chinese Academy of Sciences Beijing100190 China School of Materials Science and Engineering Changzhou University Changzhou213164 China College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University Nanjing211800 China

Novel solvent-acidic deep eutectic solvents (DESs) have been extensively studied for the extraction of biomass lignin, but their special characteristics such as strong acidity and high viscosity hinder their direct separation from lignin. In this work, three synthesized acid-resistant polyimides (PIs), namely, B-DAPI, 6F-DAPI, and P-DAPI based on 4ʹ,6-diamidino-2-phenylindole (DAPI) with 4,4ʹ-(4,4ʹ-isopropylidenediphenoxy)bis-(phthalic anhydride) (BPADA), 4,4ʹ-(Hexafluoroisopropylidene)diphthalic anhydride (6FDA) and pyromellitic dianhydride (PMDA), respectively , were innovatively used to prepare ultrafiltration membranes for the separation of sodium lignosulfonate (LS) in the DES system (choline chloride:lactic acid ). The LS rejection and DES flux of the PI membranes were higher than those of commercial ceramic membrane ZrO 2 /TiO 2 . In the DES system, the swelling of the PI membranes decreased the LS rejection and increased the DES flux. Owing to their good affinity with DESs, the PI membranes showed higher DES flux than the theoretical value. The positive charge on the membrane surface reduced the LS rejection of the PI membranes and increased membrane fouling. Among the three PIs, the polymer with the smallest free volume fraction and polarity was the most beneficial for anti-swelling and therefore had the highest rejection. © 2022, The Authors. All rights reserved.

关键词： Lignin

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