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Chinese Journal of Chemical Engineering 2024年第1期65卷 92-105页

作者： Hongbing Fu Yufei Gu Tianhua Gao fuwei li Hengshuo Gu Hucheng Ge Yuke liu Zhixia li Hongfei lin Jiangfei Cao School of Chemistry and Chemical Engineering Guangxi UniversityNanning 530004China Guangxi Bossco Environmental Protection Technology Co. Ltd.Nanning 530007China School of Environmental and Chemical Engineering Zhaoqing UniversityZhaoqing 526000China

ZSM-5 with hierarchical pore structure was synthesized by a simple two-step hydrothermal crystallization from silica fume without using any organic ammonium templates.The synthesized ZSM-5 were oval shaped particles with a particle size about 2.0 μm and weak acid-dominated with proper Brønsted(B)and Lewis(L)acid sites.The ZSM-5 was used for catalytic co-cracking of n-octane and guaiacol,lowdensity polyethylene(LDPE)and alkali lignin(AL)to enhance the production of benzene,toluene,ethylbenzene and xylene(BTEX).The most significant synergistic effect occurred at n-octane/guaiacol at 1:1 and LDPE/AL at 1:3,under the condition,the achieved BTEX selectivity were 24%and 33%(mass)higher than the calculated values(weighted average).The highest BTEX selectivity reached 88.5%,which was 3.7%and 54.2%higher than those from individual cracking LDPE and AL.The synthesized ZSM-5 exhibited superior catalytic performance compared to the commercial ZSM-5,indicating potential application prospect.

关键词： Silica fume ZSM-5 Catalytic co-cracking Plastics lignin

Mitigating the negative catalytic effect of CuO by FAS-17 coated Al nanopowder:Isothermal ageing of Al/CuO nanothermite at 71°C and 60%relative humidity

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Defence Technology（防务技术） 2024年第4期34卷 156-167页

作者： fuwei li Qian Wang Jian Cheng Zehua Zhang Yuxuan Zhou Keer Ouyang Jianbing Xu Yinghua Ye Ruiqi Shen School of Chemistry and Chemical Engineering Nanjing University of Science&TechnologyNanjing 210094China Micro-Nano Energetic Devices Key Laboratory Ministry of Industry and Information TechnologyNanjing 210094JiangsuChina Institute of Space Propulsion Nanjing University of Science and TechnologyNanjing 210094China

The safety and reliability of weapon systems would be significantly affected by changes in the performance of energetic materials due to ambient temperature and humidity.Nanothermites have promising applications due to their excellent reactivity.Therefore it becomes extremely important to understand their aging and failure process in the environment before using them.Here,the aging and failure process of Al/CuO in 71°C/60%RH were investigated,and showed that CuO nanoparticles negatively catalyze Al nanopowders,resulting in rapid hydration.The anti-aging effect of FAS-17-coated Al nanopowder was also examined.The aging process of Al,Al/CuO,and Al@FAS-17/CuO in high humidity and heat environment were revealed by quasi-in situ SEM and TEM methods.Compared with the aging of pure Al,the Al nanopowder in the nanothermites strongly agglomerated with the CuO nanopowder and hydrated earlier.This may be caused by CuO catalyzed hydration of Al nanopowder.The energy release experiments showed that the performance of Al/CuO decreased rapidly and failed to ignite after 4 h of aging.In contrast,the Al@FAS-17/CuO thermite can achieve long-term stability of up to 60 h in the same environment by simple cladding of FAS-17.It is found that FAS-17 coated Al nanopowder can prevent both particle agglomeration and water erosion,which is an effective means to make nanothermites application in high humidity and heat environment.

关键词： Al/CuO nanothermite FAS-17 coating Aging and failure process

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Predication of Selective Ring-opening Hydrogenolysis for Furfuryl Alcohol to Produce Pentanediol over Dual-atom Catalysts

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Chemical Research in Chinese Universities 2024年第1期40卷 55-63页

作者： WANG Tingting WANG Jia XI Yongjie HU Bin li fuwei State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000P.R.China University of Chinese Academy of Sciences Beijing 100049P.R.China

Selective activation of C-O bond is of fundamental importance in the precise conversion of oxygenates into value-added compounds in an atom-economic and sustainable manner, and meanwhile, the structurally well-defined dual-atoms catalysts (DACs) have been scarcely investigated in this field. In this study, a series of transition metal DACs anchored on nitrogen-doped graphene (TM2/NC, TM=Pt, Ir, Rh, Pd, Ru, Co, Ni and Cu) was constructed to make a comprehensive investigation of their selectivity in the hydrogenative transformation of furfuryl alcohol (FAL), an important biomass platform molecule, to 1,2-pentanediol (1,2-PeD) via selective cleavage of furanic C5-O bond, by density functional theory (DFT) calculations and microkinetic modeling. We found that Ir2/NC demonstrated a high selectivity for the cleavage of furanic C5-O bond to produce 1,2-PeD, while the production of THFAL or 1,5-pentanediol (1,5-PeD) on other TM2/NC catalysts are more favorable. Furthermore, we found that the selective C-O bond cleavage of FAL furan ring is affected by the orbital overlap between the d-orbitals of the anchored metal atoms and the p-orbitals of the adsorbed C atom in FAL, suggesting that the selectivity of the C-O bond cleavage is inextricably related with the electronic property of the anchored metals.

关键词： Furfuryl alcohol Hydrogenation Dual-atom catalyst Density functional theory(DFT)calculation

Shear behaviour of a rock bridge sandwiched between incipient joints under the influence of hydraulic pressures

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International Journal of Mining Science and Technology 2023年第2期33卷 233-242页

作者： Shicheng Wang Xuxu Yang lichao li Panpan Sun Lei Yang fuwei li Shandong Key Laboratory of Civil Engineering Disaster Prevention and Mitigation Shandong University of Science and TechnologyQingdao 266590China School of Civil Engineering and Architecture Shandong University of Science and TechnologyQingdao 266590China

The rock bridges sandwiched in incipiently jointed rock mass were considered as barriers that block the fluid seepage,and provide certain shear strength reservation.For better revealing the influence of hydraulic pressure on the failure behaviour of rock bridges,direct shear tests were carried out through a newly proposed method on rock samples that contain two parallel incipient joints.By developing the gypsum-silicone pad coupling samples,a conventional triaxial test system was qualified to implement direct shear tests with satisfied sealing capability.The results showed that the rock bridges could be failed through the tensile failure,shear failure and mixed failure mechanism.The hydraulic pressure would facilitate the tensile failure mechanism and induce rougher fracture surfaces;while the normal stress would facilitate the shear failure mechanism and induce less rough fracture.The hydraulic pressure reduced the global shear strength of the rock block through reducing the efficient normal stress applied on the rock bridge area,which was highly dependent on the joint persistence,k.Moreover,because of the iterating occurrence of the hydraulic pressure lag with the fracture propagation,the rock bridge failure stage in the shear stress-shear displacement curves displayed a fluctuation trend.

关键词： Direct shear tests Hydraulic pressure Rock bridge Failure mechanism Hydraulic pressure lag Rock joints

Geochronology and Geochemistry of Ore-related Granitoids in the Giant Gariatong Rb Deposit,Tibet and Implications for Rb Metallogeny in China

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Acta Geologica Sinica(English Edition) 2024年第1期98卷 83-103页

作者： liN Bin TANG Juxing TANG Pan SUN Yan QI Jing MSANTOSH XIE Jinling DENG Shilin li Faqiao XIE fuwei ZHOU Aorigele MNR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China SinoProbe Laboratory Chinese Academy of Geological SciencesBeijing 100094China The Key Laboratory of the Ministry of Education on Solid Waste Treatment and Recycling School of Environment and ResourceSouthwest University of Science and TechnologyMianyangSichuan 621010China School of Earth Sciences and Resources China University of Geosciences(Beijing)Beijing 100083China Department of Earth Sciences University of AdelaideAdelaide SA-5005Australia Faculty of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengdu 610031China Regional Geological Survey Team of the Tibetan Bureau of Geology and Mineral Exploration and Development Lhasa 851400China College of Earth Science and Key Laboratory of Tectonic Controlled Mineralization and Oil Reservoirs Chengdu University of TechnologyChengdu 610059China

Rubidium(Rb)deposits mostly occur in the South China and Central Asia orogenic belts and are often closely associated with highly differentiated granites.This study investigates a newly-discovered giant Rb deposit at Gariatong in the Central Lhasa terrane in Tibet.Detailed field studies and logging data revealed that the Rb mineralization mainly occurs in monzogranite and is related to greisenization.LA-ICP-MS U-Pb dating of zircon yielded ages of 19.1±0.2 Ma and 19.0±0.2 Ma for greisenized monzogranite and fresh monzogranite,respectively.The monzogranites are characterized as strongly peraluminous,with high contents of SiO2,Al2O3,K2O and Na2O as well as a high differentiation index.They are enriched in light rare earth and large ion lithophile elements with significant negative Eu anomalies and depleted high fieldstrength elements.Petrological and geochemical features of these ore-related monzogranites suggest that they are highly fractionated S-type granites,derived from remelting of crustal materials in a post-collisional setting.The geochemistry of zircon and apatite points to a low oxygen fugacity of the ore-related monzogranite during the magma’s evolution.The discovery of the Gariatong Rb deposit suggests that the Central Lhasa terrane may be an important region for rare metal mineralization.

关键词： LA-ICP-MS U-Pb dating geochemistry Rb metallogeny Gariatong Tibet

Palladium-Catalyzed Tandem Carbonylative Aza-Wacker-Type Cyclization of Nucleophile Tethered Alkene to Access Fused N-Heterocycles

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Chinese Journal of Chemistry 2021年第2期39卷 317-322页

作者： lijun Shi Mingshan Wen fuwei li State Key Laboratory for Oxo Synthesis and Selective Oxidation Suzhou Research Institute of LICPLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhouGansu730000 China University of the Chinese Academy of Sciences Beijing100049 China

Although tandem reactions offer rapid access to structurally complex molecules in one-pot reaction,the selectivity issue needs to be addressed particularly when incompatible step reactions are involved.Herein,we report the selective synthesis of fused N-heterocycles from nucleophile-tethered alkenylamide and carbon monoxide via palladium(Pd)-catalyzed tandem carbonylative aza-Wacker-type cyclization.The electron-deficient nature of amide N—H and the intramolecular coordination of Pd with alkene accelerate the aminopalladation and effectively prevent the side oxidative carbonylation of diamine moiety to form urea.It is also found that the reported acyl Pd chloride intermediate may not be involved in this tandem cyclization.This work not only provides an efficient synthetic route to fused 1,4-diazepanones and 1,4-diazepanes but also inspires further development of tandem reactions for the diverse synthesis of heterocycles.

关键词： Palladium Carbonylation Heterocycles Alkenes Tandem reaction

Positive effects of PVP in MIC:Preparation and characterization of Al-Core heterojunction fibers

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Defence Technology（防务技术） 2023年第1期19卷 52-62页

作者： fuwei li Yue-ting Wang Cheng-ai Wang Yun Shen Ze-hua Zhang Jian Cheng Shuang-zhang Wu Ying-hua Ye Rui-qi Shen School of Chemistry and Chemical Engineering Nanjing University of Science&TechnologyNanjing210094China Micro-Nano Energetic Devices Key Laboratory Ministry of Industry and Information TechnologyNanjingJiangsu210094China College of Field Engineering Army Engineering University of PLANanjing210007China

The core-shell metastable intermolecular composites(MIC)have attracted much attention in the past few years due to their unique properties.Here,the preparation of Al-Core heterojunction fibers using PVP as a template is proposed.The nano-Al was directly added to the precursor solution of cupric acetate monohydrate(CAM)/Polyvinylpyrrolidone(PVP),and the initial Al@CAM/PVP fibers were obtained via electrospinning.The core-shell MIC fibers are then obtained by calcining the initial fibers.The morphology,structure,and composition of Al-core MIC fibers were characterized,that the energetic fibers calcined at 300℃,350℃,and 400℃have a core-shell structure with shell compositions CuxO and PVP,CuxO and Cu O,respectively.The energy release characteristics of Al-core MIC were investigated,and preliminary ignition tests were performed using an ignition temperature measuring instrument and a pulsed laser.The energetic fibers calcined at 300℃exhibited unique properties.The decomposition of PVP in the shell layer promoted exotherm,and a low-temperature exothermic peak was shown at 372-458℃.Lower ignition temperatures and higher flame heights were observed in the combustion tests than calcination at 350℃and 400℃.An unexpected result was that PVP can play a positive role in Al/CuO nanothermites.Simultaneously,this preparation method provided an idea for the integrated preparation of core-shell Al-Core MIC fibers and tuning the properties of MIC.

关键词： Al-Core heterojunction structure Metastable intermolecular composites(MIC) Al/CuO nanothermites Polyvinylpyrrolidone(PVP)

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新时期我国生物多样性法制建设思考

生物多样性 2024年第5期32卷 1-11页

作者：赵富伟李颖硕陈慧生态环境部南京环境科学研究所南京210042

中国是生物多样性最丰富的国家之一,近年在生物多样性保护上取得了重要进展,在国际上引领达成《昆明-蒙特利尔全球生物多样性框架》,但国内生物多样性法制建设却略显滞后。国家从生物多样性的资源属性和经济价值出发,以保护为主要目的,... 详细信息

中国是生物多样性最丰富的国家之一,近年在生物多样性保护上取得了重要进展,在国际上引领达成《昆明-蒙特利尔全球生物多样性框架》,但国内生物多样性法制建设却略显滞后。国家从生物多样性的资源属性和经济价值出发,以保护为主要目的,兼顾资源合理利用,发布实施《森林法》《野生动物保护法》《种子法》等基本涵盖生态系统、物种和遗传多样性的法律法规,初步建立生物多样性法制体系。但现行生物多样性相关法律法规的立法理念滞后,立法系统性不强,关键制度组成不健全,与人与自然和谐共生的现代化建设需求极不相称。当前,国家已经启动生态环境法典立法工作,应当以此为契机,采用人与自然和谐共生的地球生命共同体理念,制订全面、完整覆盖生态系统、物种和遗传多样性三个层次并且能够保障实现生物多样性保护、持续利用和惠益分享三个目标的新时期生物多样性制度体系,建立健全立法结构科学合理、制度组成完整、系统的生物多样性法制体系,保障我国持续引领生物多样性国际治理。

关键词：生物多样性法制生态环境法典人与自然和谐共生生物遗传资源惠益分享

病原微生物遗传资源共享利用制度现状、展望与应对建议

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微生物学通报 2024年第3期51卷 720-731页

作者：孙名浩李颖硕赵富伟生态环境部南京环境科学研究所江苏南京210042

国际社会关于病原微生物遗传资源讨论的起点和最终目标均是公共卫生健康风险的预防、防范和应对,及时共享病原体及其核酸序列数据和相关元数据对于实现早期识别、风险评估,以及制定和执行诊断、疫苗和治疗方法等对策至关重要。建立公平... 详细信息

国际社会关于病原微生物遗传资源讨论的起点和最终目标均是公共卫生健康风险的预防、防范和应对,及时共享病原体及其核酸序列数据和相关元数据对于实现早期识别、风险评估,以及制定和执行诊断、疫苗和治疗方法等对策至关重要。建立公平公正的病原微生物遗传资源惠益分享机制,已经成为确保病原体及其相关数据及时、快速共享的关键要素。病原微生物遗传资源或其数据信息的获取与惠益分享相关提案和讨论体现出缔约方越发重视国家权益和国内利益相关方主体权益保障。我国病原微生物遗传资源监管立法突出公共卫生健康和生物安全风险预防、防范和应对,与现行国际规则的宗旨以及国际规则的讨论进程总体契合,作为新兴生产要素的科学数据的管理制度和管理体系建设尚处于快速发展和不断探索阶段,国内微生物遗传资源共享利用的行业实践逐渐成形。本文梳理了国际社会和我国病原微生物遗传资源共享利用制度现状,并基于病原微生物遗传资源国际制度发展趋势和我国病原微生物遗传资源共享利用实践需求,提出了病原微生物遗传资源共享利用制度展望以及应对建议。

关键词：病原微生物遗传资源共享利用获取与惠益分享科学数据

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小麦-玉米“吨半粮”高效栽培技术及其应用

西北农业学报 2024年第1期33卷 15-20页

作者：王东林祥殷复伟李令伟薛丽娜西北农林科技大学农学院陕西杨凌712100 泰安市农业技术推广站山东泰安271000 德州市农业技术推广站山东德州253000 泰安市岳洋农作物专业合作社山东泰安271000

小麦-玉米“吨半粮”高效栽培技术通过创新并优化集成麦-玉周年生产品种优选搭配、耕层优化、高产群体构建、水肥精准调控等关键技术,配套地力培肥、植保、机械作业等技术,实现周年产量1500 kg/667m 2及以上高产,有力带动大面积中低产... 详细信息

小麦-玉米“吨半粮”高效栽培技术通过创新并优化集成麦-玉周年生产品种优选搭配、耕层优化、高产群体构建、水肥精准调控等关键技术,配套地力培肥、植保、机械作业等技术,实现周年产量1500 kg/667m 2及以上高产,有力带动大面积中低产田产能提升,大幅度提高粮食单产。

关键词：小麦—玉米吨半粮高效栽培技术产能提升