检索结果-内蒙古大学图书馆

Chinese Journal of Chemical engineering 2025年第3期 172-184页

作者： Zhe Ding Li Guo Fang Bai Chao Hua Ping Lu Jinyi Chen Key Laboratory of Green Process and Engineering Institute of Process Engineering Chinese Academy of Sciences School of Chemical Engineering University of Chinese Academy of Sciences Hubei Three Gorges Laboratory State Key Laboratory of Petroleum Molecular & Process Engineering

Low-temperature hydrogenation of silicon tetrachloride（STC） is an essential step in polysilicon *** addition of CuCl to silicon powder is currently a commonly used catalytic method and the silicon powder acts as both a reactant and a ***,the reaction mechanism and the structure-activity relationship of this process have not been fully *** this work,a comprehensive study of the reaction mechanism in the presence of Si and Cu3Si was carried out using density functional theory（DFT） combined with experiments,*** results indicated that the ratedetermining step（RDS） in the presence of Si is the phase transition of Si atom,meanwhile,the RDS in the presence of Cu3Si is the TCS-generation *** activation barrier of the latter is smaller,highlighting that the interaction of Si with the bulk phase is the pivotal factor influencing the catalytic *** feasibility of transition metal doping to facilitate this step was further *** Si disengage energy（Ed） was used as a quantitative parameter to assess the catalytic activity of the catalysts,and the optimal descriptor was determined through interpretable machine *** was demonstrated that d-band center and electron transfer play a crucial role in regulating the level of *** work reveals the mechanism and structure-activity relationship for the low-temperature hydrogenation reaction of STC,and provides a basis for the rational design of catalysts.

关键词：

A Facile Li_(2)TiO_(3) Surface Modification to Improve the Structure Stability and Electrochemical Performance of Full Concentration Gradient Li-Rich Oxides

学校读者我要写书评

暂无评论

Energy & Environmental Materials 2024年第3期7卷 41-48页

作者： Naifang Hu Yuan Yang Lin Li Yuhan Zhang Zhiwei Hu Lan Zhang Jun Ma Guanglei Cui Qingdao Industrial Energy Storage Research Institute Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China Institute of Materials Science and Engineering Ocean University of ChinaQingdao 266100China School of Future Technology University of Chinese Academy of SciencesBeijing 100049China Max Planck Institute for Chemical Physics of Solids Nothnitzer Strasse 40Dresden D-01187Germany CAS Key Laboratory of Green Process and Engineering Beijing Key Laboratory of Ionic Liquids Clean ProcessState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China Shandong Energy Institute Qingdao 266101China

Full concentration gradient lithium-rich layered oxides are catching lots of interest as the next generation cathode for lithium-ion batteries due to their high discharge voltage,reduced voltage decay and enhanced rate performance,whereas the high lithium residues on its surface impairs the structure stability and long-term cycle ***,a facile multifunctional surface modification method is implemented to eliminate surface lithium residues of full concentration gradient lithium-rich layered oxides by a wet chemistry reaction with tetrabutyl titanate and the post-annealing *** realizes not only a stable Li_(2)TiO_(3)coating layer with 3D diffusion channels for fast Li^(+)ions transfer,but also dopes partial Ti^(4+)ions into the sub-surface region of full concentration gradient lithium-rich layered oxides to further strengthen its crystal ***,the modified full concentration gradient lithium-rich layered oxides exhibit improved structure stability,elevated thermal stability with decomposition temperature from 289.57℃to 321.72℃,and enhanced cycle performance(205.1 mAh g^(-1)after 150 cycles)with slowed voltage drop(1.67 mV per cycle).This work proposes a facile and integrated modification method to enhance the comprehensive performance of full concentration gradient lithium-rich layered oxides,which can facilitate its practical application for developing higher energy density lithium-ion batteries.

关键词： full concentration gradient lithium-rich layered oxides structure stability surface modification

Eliminating Hysteresis of Perovskite Solar Cells with Hollow CO_(2) Mesoporous Electron Transport Layer

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2022年第1期38卷 117-122页

作者： HAN Wensheng WANG Yongling WAN Jiawei WANG Dan State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190P.R.China University of Chinese Academy of Sciences Beijing 100049P.R.China Graduate School of Science and Technology Gunma University 1-5-1 Tenjin-choKiryuGunma 376-8515Japan

Current density-voltage(J-V) hysteresis issue caused by unbalanced charge transport has greatly limited the improvement of power conversion efficiency(PCE) of halide perovskite solar cells(PSCs). Herein, hollow TiO2 mesoporous electron transport layer(ETL) was used to fabricate PSCs. The structure-dependent charge collection as well as its effect on PCE and hysteresis impactor(HI) of PSC were investigated. The results demonstrate that TiO2 hollow spheres in a size of around 50 nm (HS-50) can form a high quality perovskite/ETL interface with a less trap density. Moreover, the hollow TiO2 with the thin shell can help promote the extraction of electrons from perovskite layer to ETL, so as to reduce the charge accumulation and recombination at the perovskite/ETL interface and alleviate the hysteresis behavior. As a result, PSCs with HS-50 TiO2 delivered a champion PCE of 16.81% with a small HI of 0.0297, indicating a better performance than the commercial P25(PCE of 15.87%, HI of 0.2571).

关键词： Hollow structure Titanium dioxide Hysteresis Halide perovskite solar cell Charge collection

Strategic Design and Facile Synthesis of Porous Hyper-Cross-Linked Phosphonium Bromide Microspheres for Catalyzing Co2 Conversion to Cyclic Carbonate

学校读者我要写书评

暂无评论

SSRN 2024年

作者： Li, Ming Liu, Ruixia Liu, Qi Liu, Ying Liu, Yifan Su, Qian Yang, Zifeng Li, Yunong Henan Institute of Advanced Technology Zhengzhou University Zhengzhou450001 China Beijing Key Laboratory of Ionic Liquids Clean Process Key Laboratory of Green Process and Engineering State Key Laboratory of Mesoscience and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China Longzihu New Energy Laboratory Zhengzhou Institute of Emerging Industrial Technology Henan University Zhengzhou450000 China

ABSTRACT: Heterogeneous ionic liquid (IL) catalysts with multiple active sites can be considered as the highly efficient catalyst for CO2 conversion to cyclic carbonates. It is extremely challenging to achieve the strategic design and precise control of multi-site polymeric ILs’ morphology and properties. In this work, we developed a novel and facile polymerization-ionization method employing flexible brominated monomers as raw materials (e.g. 4-bromo-1-butene) to successfully synthesize porous hyper-cross-linked phosphonium bromide-microspheres (PBr-microspheres), in order to break through the drawbacks of multi-step preparation and difficulty in microsphere forming. Compared with conventional bromine spheres of the same size, the specific surface area of the new synthetic bromine sphere is 16 times, and the average pore size is one-eighth, with 3-times CO2 adsorption capacity, with rich microporous structure and exposed active sites, excellent CO2 adsorption capacity and thermal stability. PBr-microspheres can achieve synergistic effect of physical adsorption and chemical interaction for CO2, thus enhancing the catalytic performance in CO2 conversion process, affording propylene oxide conversion of 99.7% and propylene carbonate selectivity of 99.9%, while the catalytic activity did not decrease significantly after reusing 8 runs. This facile controllable synthesis of PBr-microspheres with excellent catalytic performance provides a new idea for heterogeneous ILs catalyzed CO2 utilization. © 2024, The Authors. All rights reserved.

关键词： Carbon dioxide

Investigation of the rigid structure, luminescence properties of stable CaY2Al4SiO12: Bi/Tb/Sm phosphors toward wLEDs application

学校读者我要写书评

暂无评论

Ceramics International 2025年

作者： Chen, C.X. Zheng, X.Z. Dai, W.B. Ni, C.Y. Li, W.Y. Wu, D. Hubei Key Laboratory of Plasma Chemistry and Advanced Materials & Key Laboratory of Green Chemical Engineering Process of Ministry of Education Wuhan Institute of Technology Wuhan430205 China Key Laboratory of Testing and Tracing of Rare Earth Products for State Market Regulation Jiangxi University of Science and Technology Ganzhou341000 China

As energy consumption intensifies, energy saving and environmentally friendly phosphor-converted white light-emitting diodes (pc-wLEDs) have become the current research hotspots. The garnet-based CaY2Al4SiO12 (CYAS) phosphors, with their abundant lattice sites and stable physical properties, are ideal candidates as phosphor hosts. Through comprehensive experimental and theoretical analyses, including XRD/Rietveld refinement and density functional theory (DFT) calculations, it was determined that Bi3+/Tb3+/Sm3+ ions preferentially occupy the Y3+ lattice site. The luminescence properties and thermal stability of CYAS: Bi3+/Tb3+/Sm3+ have been extensively investigated. The quantum yield (QY) has been enhanced to 48.3 % due to energy transfer (ET), which is not a significant difference compared to existing phosphors, and by superposition of blue (Bi, 3P1 → 1S0), green (Tb, 5D4 → 7F5), and red (Sm, 4G5/2 → 6H5/2) emission, resulting in tunable spectrum and high-quality, full-spectrum white light emission. Finally, the wLED device with high color rendering index (CRI, 87), high luminous efficiency (LE, 74 lm·W−1), and low correlated color temperature (CCT, 4747.56 K) were fabricated by a remote ‘encapsulation’ packaging strategy, suggesting that the phosphor can be applied to high quality white light illumination. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Phosphors

Formation of biomimetic hierarchical nanostructure in homopolymers and block copolymer ternary blend particles

学校读者我要写书评

暂无评论

Particuology 2022年第5期20卷 98-109页

作者： Shu Kikuchi Ryoka Shoji Shinji Kanehashi Guanghui Ma Kenji Ogino Graduate School of Bio-Applications and Systems Engineering Tokyo University of Agriculture and Technology2-24-16 NakachoKoganei-shiTokyo 184-8588Japan Institute of Global Innovation Research Tokyo University of Agriculture and Technology2-24-16 NakachoKoganei-shiTokyo 184-8588Japan State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100080China

In order to mimic hierarchical nanostructures in nature,particles of polymer blends consisting of poly(4-butyltriphenylamine)(PBTPA),poly(methyl methacrylate)(PMMA)and PBTPA-block-PMMA were fabricated by a solvent evaporation *** of the molecular weight and the chemical composition of PBTPA-b-PMMA,molecular weights of homopolymers,and the composition of the blend on the morphology were *** polymer blend particle consisting of PBTPA and PMMA homopolymers exhibited thermodynamically favored core-shell structure,in which more hydrophilic PMMA-shell surrounded *** addition of 10 wt%of PBTPA-b-PMMA caused the morphological transition from core-shell toJanus or inversed core-shell,in which PBTPA-shell surrounded PMMA-core,depending on the molecular weight of PBTPA segment in *** the molecular weight of PMMA segment was higher than that of PMMA homopolymer,watermelon-like particles in which small PBTPA domain less than 80 nm dispersed in the PMMA domain surrounded by PBTPA shell were *** the ratio of PBTPA-b-PMMA increased,the interface of the macrophase separation became *** 50 wt%of the PBTPA-b-PMMA,only microphase separation was *** measurement of interfacial tension by pendant drop method demonstrated that PBTPA-b-PMMA lower the interfacial tension between PBTPA and the aqueous phase to the value similar to that of PMMA with the aqueous phase.

关键词： Microsphere Hierarchical structure Polymer blend Block copolymer Solvent evaporation Phase separation

Quaternary Ammonium Cof-Based Proton Exchange Membranes for Enhanced Electrochemical Hydrogen Compression

学校读者我要写书评

暂无评论

SSRN 2025年

作者： Pang, Xiao Liu, Ziwen Xu, Shuting Lv, Kexin Shi, Benbing Dong, Xu Xing, Na Gao, Zhong Zhu, Shiyi Zhang, Leilang Yao, Zengguang Cheng, Lijuan Wang, Hui Xu, Kai Liu, Yawei Wu, Hong Jiang, Zhongyi Key Laboratory for Green Chemical Technology Ministry of Education School of Chemical Engineering and Technology Tianjin University Tianjin300072 China Ningbo Key Laboratory of Green Petrochemical Carbon Emission Reduction Technology and Equipment Zhejiang Institute Tianjin University Zhejiang Ningbo315201 China State Key Laboratory of Synthetic Biology Tianjin University Tianjin300072 China Beijing Key Laboratory of Ionic LiquidsClean Process CAS Key Laboratory of Green Process and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China MOE Key Laboratory of Bioorganic NST Phosphorous Chemistry and Chemical Biology Department of Chemistry Tsinghua University Beijing100084 China

Proton exchange membranes (PEMs) with high proton conductivity, excellent mechanical strength, and minimal hydrogen crossover are crucial for the practical implementation of electrochemical hydrogen energy conversion devices, including electrochemical hydrogen compression (EHC). Herein, hydrazone-linked ionic covalent organic frameworks (iCOF) bearing quaternary ammonium (QA) groups were synthesized and introduced into the sulfonated poly (ether ether ketone) (SPEEK) matrix to fabricate hybrid PEMs. Among them, the orderly arrangement of QA and -NH- groups on iCOF not only rearranged the distribution of -SO3H groups in the SPEEK polymer matrix, increasing the continuity and connectivity of the proton conduction pathways but also formed acid-base pairs with -SO3H groups to facilitate proton dissociation. Additionally, the electrostatic and hydrogen bonding interactions formed between iCOF and SPEEK matrix optimized the microphase separation structure and enhanced the mechanical stability of membranes. As a result, the hybrid PEMs exhibited an enhanced proton conductivity of 469.0 mS cm-1 (80°C, 100% RH) with only 2 wt% iCOF content, high mechanical strength of 91.3 MPa, and superior EHC performance with a high outlet pressure of 3.31 MPa (30°C, 100% RH) and high-purity hydrogen (>99.9%) from a 40% hydrogen-nitrogen mixture. © 2025, The Authors. All rights reserved.

关键词： Hydrogen bonds

Extraction of artemisinin with hydroxypropyl-β-cyclodextrin aqueous solution for fabrication of drinkable extract

学校读者我要写书评

暂无评论

green Chemical engineering 2021年第2期2卷 197-206页

作者： Yongqiang Zhang Yingying Cao Xiangzhan Meng Phonphat Prawang Hui Wang Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and EngineeringState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringInnovation Academy for Green ManufactureChinese Academy of SciencesNo.1 BeierjieZhongguancunHaidian DistrictBeijing100190China Sino-Danish College University of Chinese Academy of SciencesYanqihu CampusNo.380 HuaibeizhuangHuairou DistrictBeijing101408China

A process for extraction of artemisinin(Ars)from Artemisia annua *** on aqueous solution of cyclodextrin derivative under ultrasonic irradiation was *** the test additives,the system containing edible hydroxypropyl-β-cyclodextrin(HPBCD)was shown to be efficient for this *** optimal extraction conditions were predicted by artificial neural network,under which the extraction amount of Ars could reach 8.66 mg per gram of the leaves,much higher than the value in water(1.70 mg g-1).Kinetics study indicated that HPBCD enhanced the equilibrium amount of Ars in water,and ultrasonic irradiation accelerated extraction rate and reduced the activation *** study showed that the formation of Ars-HPBCD complex during extraction enhanced the water solubility of Ars and facilitated the extraction,and the configuration of Ars-HPBCD complex was modeled by molecular docking,which was further verified by *** work provides a convenient way to fabricate the traditional tea-based medicament of natural drugs to make production of this famous antimalarial medicine cheaper.

关键词： Artemisinin Cyclodextrin derivative Aqueous solution Ultrasonic assisted extraction Complex

Synergistic Separation Mechanisms of Impurities in Ionic Liquid Aqueous Solution from the Cellulose Regeneration process

学校读者我要写书评

暂无评论

SSRN 2025年

作者： Zou, Shengwang Wang, Junfeng Wu, Yingqiu Dong, Yanan Wang, Huijao Nie, Yi Xu, Hongxiang Beijing Key Laboratory of Ionic Liquids Clean Process State Key Laboratory of Mesoscience and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China Innovation Academy for Green Manufacture Chinese Academy of Sciences Beijing100190 China Beijing100083 China

Ionic liquids (ILs) have shown significant potential for industrial application in the cellulose regeneration process. However, the accumulation of impurities, especially phosphorus (P) from the raw materials, in the ionic liquid (IL) aqueous solutions generated during the cellulose regeneration process, seriously affects the performance of IL and the quality of the final products. In this study, a crystallization precipitation method was employed to investigate the removal of impurities from IL aqueous solutions. The results demonstrated that the presence of IL accelerated the phase transformation of amorphous calcium phosphate to hydroxyapatite, although it prolonged the time to reach equilibrium. The highest P removal efficiency was achieved at a Ca/P molar ratio of 1.67:1, with an increase in pH further enhanced the removal efficiency. The morphology and size of crystallization precipitates were significantly influenced by the reaction time, pH, IL concentration, and temperature. By optimizing the reaction conditions, a P removal efficiency of 88.82% was achieved in IL aqueous solutions generated during the established hundred-ton-scale cellulose regeneration demonstration production line, with the process also exhibited synergistic removal capabilities for NO3-, SO42-, and Mg2+. These findings suggested that this method effectively removed the P and other inorganic impurities from the IL aqueous solutions generated during the cellulose regeneration process. © 2025, The Authors. All rights reserved.

关键词： Molar ratio

Deep Learning Assisted High Throughput Screening of Ionic Liquid Electrolytes for Nrr and Co2rr

学校读者我要写书评

暂无评论

SSRN 2023年

作者： Guo, Yandong Song, Yingying Chen, Junwu Yuan, Menglei Dong, Kun Bohai University Liaoning Jinzhou121013 China Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and Engineering State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China

Non-aqueous ionic liquids (ILs) with high solubility of both nitrogen and carbon dioxide have greater potential to be used as electrolytes for NRR and CO2RR due to reduced HER effects and high conductivity as well as low viscosity. However, conventional experimental methods for screening IL electrolytes are time-consuming and labor-intensive. In order to solve such difficulties, deep learning assisted screen of ILs was investigated in this work. The experimental data including six IL properties like viscosity, conductivity, melting point, density, nitrogen solubility, and carbon dioxide solubility of were collected approximately 40,000. The graph neural network model exhibited excellent ability in predicting performance in comparison to the traditional machine learning models. Furthermore, the transfer learning approach was employed to enhance the model prediction on a small dataset. A virtual database was constructed with 2 million IL structures to be used for high throughput screening. Using the properties of the IL [P6,6,6,14][eFAP] with higher Faradaic conversion efficiency as the input thresholds, we performed high throughput screening of the virtual dataset, obtained 141 ILs based on the Synthetic Complexity Score (SCScore), in which tetracyanoborate based ([B(CN)4]-) ILs and perchlorate based ([ClO4]-) ILs accounted for large percentages, and finally identified 8 ILs superior to [P6,6,6,14][eFAP] as ideal electrolyte materials for both NRR and CO2RR that have been reported to be synthesizable. Our works provides the effective tool for designing the novel IL-based electrolytes and will be helpful for the researchers who are seeking the ILs with benign ability in NRR and CO2RR. © 2023, The Authors. All rights reserved.

关键词： Ionic liquids