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Phosphotungstic acid immobilized on amino-functionalized TS-1 zeolite as a solid acid catalyst for the synthesis of tributyl citrate

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Chinese Journal of Chemical Engineering 2024年第6期70卷 199-210页

作者： Pei Li Bianfang Shi Junyao shen Ran Cui Wenze Guo Ling Zhao Zhenhao Xi State Key Laboratory of Chemical Engineering East China University of Science and TechnologyShanghai 200237China Key Laboratory of Smart Manufacturing in Energy Chemical Process Ministry of EducationEast China University of Science and TechnologyShanghai 200237China

The amino-functionalization of TS-1 zeolite followed by immobilization of phosphotungstic acid(hPW)was presented to prepare a strong solid acid catalyst for the synthesis of bio-based tributyl citrate from the esterification of citric acid and n-butanol.γ-Aminopropyltriethoxysilane(APTES)was first grafted on the TS-1 zeolite via the condensation reactions with surface hydroxyl groups,and subsequently the hPW was immobilized via the reaction between the amino groups and the protons from hPW-forming strong ionic *** Keggin structure of hPW and MFI topology of TS-1 zeolite were well maintained after the *** amino-functionalization generated abundant uniformly distributed active sites on TS-1 for hPW immobilization,which promoted the dispersity,abundance,as well as the stability of the acid *** tetrahedrally coordinated framework titanium and non-framework titania behaved as weak Lewis acid sites,and the protons from the immobilized hPW acted as the moderate or strong Brønsted acid *** optimized TBC yield of 96.2%(mol)with a conversion of-COOh of 98.1%(mol)was achieved at 150℃for 6 h over the hPW immobilized on amino-functionalized *** catalyst exhibited good stability after four consecutive reaction runs,where the activity leveled off at still a relatively high level after somewhat deactivation possibly caused by the leaching of a small portion of weakly anchored APTES or hPW.

关键词： Amino-functionalization Phosphotungstic acid TS-1 zeolite Esterification Tributyl citrate

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Cobalt-Catalyzed Switchable[4+1]and[4+1+1]Spirocyclization of Aromatic Amides with 2-Diazo-1h-indene-1,3(2h)-dione:Access to Spiro Indene-2,1'-isoindolinones and Spiro Isochroman-3,1'-isoindolinones

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Chinese Journal of Chemistry 2024年第4期42卷 363-369页

作者： Bin Li Mengmeng Xie Jingyu Li Nana shen Xinying Zhang Xuesen Fan State Key Laboratory of Antiviral Drugs Pingyuan LaboratoryKey Laboratory of Green Chemical Media and ReactionsKey Laboratory for Yellow River and Huai River Water Environmental Pollution ControlMinistry of EducationSchool of EnvironmentSchool of Chemistry and Chemical EngineeringHenan Normal UniversityXinxiangHenan453007 China

herein,we report a condition-controlled divergent synthesis of spiro indene-2,1'-isoindolinones and spiro isochroman-3,1'-isoindolinones through cobalt-catalyzed formal[4+1]and[4+1+1]spirocyclization of aromatic amides with 2-diazo-1h-indene-1,3(2h)-*** the reaction is carried out under air in ethyl acetate,spiro indene-2,1'-isoindolinones are formed through Co(II)-catalyzed C—h/N—h[4+1]*** the reaction is run under O2 in Ch3CN,on the other hand,spiro isochroman-3,1'-isoindolinones are generated through Baeyer-Villiger oxidation of the in situ formed spiro indene-2,1'-isoindolinones with O2 as a cheaper and environmental-friendly oxygen *** general,these protocols have advantages such as using non-precious and earth-abundant metal catalyst,no extra additive,high efficiency and regioselectivity.A gram-scale synthesis and the removal of the directing group further highlight its utility.

关键词： Spiro indene-2,1'-isoindolinones Spiro isochroman-3,1'-isoindolinones 3d Transition metals Cobalt-catalyzed C-h Activation Switchable[4+1]and[4+1+1]spirocyclization Aromatic amides 2-Diazo-1h-indene-1,3(2h)-dione

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Reliability of DC-link capacitor in pulsed power supply for accelerator magnet

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Nuclear Science and Techniques 2024年第9期35卷 28-40页

作者： Jie Wang Da-Qing Gao Wan-Zeng shen hong-Bin Yan Li-Jun Mao Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China School of Nuclear Science and Technology Lanzhou UniversityLanzhou 730000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China

Capacitors are widely used in pulsed magnet power supplies to reduce ripple voltage,store energy,and decrease power *** this study,DC-link capacitors in pulsed power supplies were *** deriving an analytical method for the capacitor current on the h-bridge topology side,the root-mean-square value of the capacitor current was calculated,which helps in selecting the DC-link *** proposed method solves this problem quickly and with high *** current reconstruction of the DC-link capacitor is proposed to avoid structural damage in the capacitor’s current measurement,and the capacitor’s hotspot temperature and temperature rise are calculated using the FFT *** test results showed that the error between the calculated and measured temperature increases was within 1.5℃.Finally,the lifetime of DC-link capacitors was predicted based on Monte Carlo *** proposed method can evaluate the reliability of DC-link capacitors in a non-isolated switching pulsed power supply for accelerators and is also applicable to film capacitors.

关键词： Aluminum electrolytic capacitor DC-link current DC–DC power converter hotspot temperature

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生成式人工智能技术在博物馆叙事中的应用研究

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包装工程 2024年第20期45卷 513-517页

作者：周莹沈悦江苏开放大学设计学院南京210036 南京工业大学艺术设计学院南京211816

目的本文旨在探索生成式人工智能技术(AIGC)在博物馆叙事设计中的具体应用及其对增强参观者互动体验的作用。结合用叙事学理论,本研究将分析AIGC如何通过动态与沉浸式叙事来转化展览叙事,提升用户的认知沉浸和情感联结。方法首先,运用... 详细信息

目的本文旨在探索生成式人工智能技术(AIGC)在博物馆叙事设计中的具体应用及其对增强参观者互动体验的作用。结合用叙事学理论,本研究将分析AIGC如何通过动态与沉浸式叙事来转化展览叙事,提升用户的认知沉浸和情感联结。方法首先,运用文献研究法分析AIGC在博物馆叙事中的理论基础;其次,通过案例分析法挖掘并探析实际运用AIGC技术于博物馆的案例;最后,研究了博物馆叙事传播中的隐患与挑战。结果生成式人工智能技术能够有效地识别展览数据模式并生成吸引参观者的新内容,为用户带来个性化且情境化的叙事体验,并提供个性化学习路径促进观众的认知、情感发展。结论生成式人工智能技术的融合为博物馆叙事设计提供了新的交互需求和个性化体验,多感官设计策略让参观者更好地理解和参与,AIGC会在博物馆叙事设计中形成新的体验模式。

关键词：生成式人工智能技术博物馆交互设计叙事设计

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Modulation on electrostatic potential to build a firm bridge at NiO_(x)/perovskite interface for efficient and stable perovskite solar cells

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Journal of Energy Chemistry 2024年第9期96卷 249-258页

作者： Xiangbao Yuan Xufeng Ling hongyu Wang Chengxia shen Ru Li Yehao Deng Shijian Chen Chongqing Key Laboratory of Interface Physics in Energy Conversion College of PhysicsChongqing UniversityChongqing 401331China Key Laboratory of Optoelectronic Technology&Systems(Ministry of Education) College of Optoelectronic EngineeringChongqing UniversityChongqing 400044China Center of Modern Physics Institute for Smart City of Chongqing University in LiyangLiyang 213300JiangsuChina

The NiO_(x)/perovskite interface in NiO_(x)-based inverted perovskite solar cells(PSCs)is one of the main issues that restrict device performance and long-term stability,as the unwanted interfacial defects and undesirable redox reactions cause severe interfacial non-radiative recombination and open-circuit voltage(Voc)***,a series of self-assembled molecules(SAMs)are employed to bind,bridge,and stabilize the NiO_(x)/perovskite interface by regulating the electrostatic *** on systematically theoretical and experimental studies,4-pyrazolecarboxylic acid(4-PCA)is proven as an efficient molecule to simultaneously passivate the NiO_(x)and perovskite surface traps,release the interfacial tensile stress as well as quench the detrimental interface redox reactions,thus effectively suppressing the interfacial non-radiative recombination and enhancing the quality of perovskite ***,the PSCs with 4-PCA treatment exhibited an eminently increased Voc,leading to a significant increase in power conversion efficiency from 21.28%to 23.77%.Furthermore,the unencapsulated devices maintain 92.6%and 81.3%of their initial PCEs after storing in air with a relative humidity of 20%–30%for 1000 h and heating at 65℃for 500 h in a N_(2)-filled glovebox,respectively.

关键词： Perovskite solar cells Nickel oxide Interface defects passivation Redox reaction Nonradiative recombination

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CO_(2) hydrogenation to methanol over the copper promoted In_(2)O_(3) catalyst

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Journal of Energy Chemistry 2024年第6期93卷 135-145,I0004页

作者： Rui Zou Chenyang shen Kaihang Sun Xinbin Ma Zhuoshi Li Maoshuai Li Chang-Jun Liu School of Chemical Engineering and Technology Tianjin UniversityTianjin 300350China Collaborative Innovation Center of Chemical Science&Engineering Tianjin UniversityTianjin 300072China

The metal promoted In_(2)O_(3) catalysts for CO_(2) hydrogenation to methanol have attracted wide attention because of their high activity with high methanol ***,there was still no experimental confirmation if copper could be a good promoter for In_(2)O_(3).herein,the Cu promoted In_(2)O_(3) catalyst was prepared using a deposition-precipitation *** prepared Cu/In_(2)O_(3) catalyst shows significantly higher CO_(2) conversion and space time yield(STY)of methanol,compared to the un-promoted In_(2)O_(3) *** loading of Cu facilitates the activation of both h_(2) and CO_(2) with the interface between the Cu cluster and defective In_(2)O_(3) as the active *** Cu/In_(2)O_(3) catalyst takes the CO hydrogenation pathway for methanol synthesis from CO_(2) *** exhibits a unique size effect on the CO *** temperatures below 250℃,CO adsorption on Cu/In_(2)O_(3) is stronger than that on In_(2)O_(3),causing higher methanol *** increasing temperatu res,the Cu catalyst aggregates,which leads to the formation of weak CO adsorption site and causes a decrease in the methanol *** with other metal promoted In_(2)O_(3) catalysts,it can be concluded that the catalyst with stronger CO adsorption possesses higher methanol selectivity.

关键词： CO_(2)hydrogenation Methanol Cu In_(2)O_(3) CO Selectivity DFT

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Visible-light-enabled multicomponent synthesis of trifluoromethylated 3-indolequinoxalin-2(1h)-ones without external photocatalysis

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Green Synthesis and Catalysis 2024年第1期5卷 51-56页

作者： Letian Zhang Kai Zheng Pengfei Zhang Min Jiang Jiabin shen Chao Chen Chao shen Key Laboratory of Pollution Exposure and health Intervention of Zhejiang Province College of Biology and Environmental EngineeringZhejiang Shuren UniversityHangzhou 310015China College of Petroleum Chemical Industry Changzhou UniversityChangzhou 213164China College of Material Chemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material TechnologyMinistry of EducationHangzhou Normal UniversityHangzhou 311121China

A novel and sustainable visible-light-enabled multicomponent reaction involving quinoxalin-2(1h)-ones,indoles,and CF3SO2Na that does not require an external photocatalyst is *** photoinduced reaction employs air as the sole oxidant,thereby providing a green and highly step-efficient approach to a series of biologically important trifluoromethylated 3-indolequinoxalin-2(1h)-ones.

关键词： Visible-light-catalysis Three-component reaction Trifluoromethylation Quinoxalin-2(1h)-Ones Indoles

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Altered Spinel as a Petrotectonic Indicator in Abyssal Peridotite from the Easternmost Part of Southwest Indian Ridge

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Journal of Earth Science 2016年第4期27卷 611-622页

作者： Tao Chen Zhenmin Jin Andy h.shen Wei Li Institute of Gemology China University of GeosciencesWuhan State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences

The easternmost part of Southwest Indian Ridge（SWIR） has special crustal structure, magmatic and tectonic processes. Abyssal peridotite from the easternmost part of Southwest Indian Ridge（63.5oE/28oS） is serpentinized spinel lherzolite. The accessory spinel has zoned texture, which was studied by petrography, electron probe micro-analysis（EPMA）, and backscattered electron（BSE） imaging to reconstruct the petrotectonic and hydrothermal metamorphic history of the host abyssal peridotite. The fresh core is magmatic Al-spinel with low Cr~#. The average extent of melting of the abyssal peridotite is about 5.9%. The composition of fresh magmatic spinel core indicates the studied area to be an anomalously thin crust with a melt-poor system. hydrothermal reaction modifies the chemical composition of magmatic spinel. Ferritchromit is the first product forming the inner rim during pre-serpentinization. The abyssal ferritchromit crystalized as micro- to nano-sized particle with no triple grain boundary, indicating they crystalized in a rapid cooling process during hydrothermal alteration. Chemical compositions of ferritchromit indicate a hydrothermal metamorphism in amphibolite facies. Magnetite in the outer rim was formed by replacement of ferritchromit during syn- or post-serpentinization. Authigenic chlorites crystallized in two events：（1） after formation of ferritchromit crystallized as vein in fracture-zone near the core of spinel and （2） after formation of magnetite crystallized at outermost rim. They are different in compositions, indicating their formation temperature was about 289 oC and declined to 214 oC. These results show that the abyssal peridotite had undergone amphibolite to lower-greenschist facies hydrothermal events during pre- to syn-serpentinization or post-serpentinization.

关键词： abyssal peridotite spinel ferritchromit magnetite chlorite metamorphism hydro-thermal alteration.

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Potential risks of organic contaminated soil after persulfate remediation:harmful gaseous sulfur release

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Journal of Environmental Sciences 2024年第1期135卷 1-9页

作者： Yuyang Long Zixiao Wu Xiaodong Ding Jiansong Chen Dongsheng shen Jiali shentu Cai hui Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling Zhejiang Engineering Research Center of Non-ferrous Metal Waste RecyclingInstrumental Analysis CenterSchool of Environmental Science and EngineeringZhejiang Gongshang UniversityHangzhou 310012China Shangyu yingtai Fine Chemical Co. Ltd.Shaoxing 312000China hangzhou Ecological Environment Monitoring Center Hangzhou 310007China

Persulfate is considered a convenient and efficient remediation agent for organic contaminated ***,the potential risk of sulfur into the soil remediation by persulfate remains *** this study,glass bottles with different persulfate dosages and groundwater tables were set up to simulate persulfate remediation of organic pollutants(aniline).The results found sulfate to be the main end-product(83.0%–99.5%)of persulfate remediation after10 ***,h_(2)S accounted for 93.4%–99.4%of sulfur reduction end-products,suggesting that h_(2)S was the final fate of sulfur.h_(2)S was released rapidly after one to three days at a maximum concentration of 33.0 ppm,which is sufficient to make a person *** to the fitted curve results,h_(2)S concentration decreased to a safe concentration(0.15 ppm)after 20–85 ***,the maximum concentration of methanethiol reached 0.6 *** results indicated that secondary pollution from persulfate remediation could release harmful gases over a long ***,persulfate should be used more carefully as a remediation agent for soil contamination.

关键词： Gaseous sulfur release h_2S Long period potential risk Organic contaminated soil remediation Persulfate

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Synergistic CO_(2) mineralization using coal fly ash and red mud as a composite system

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International Journal of Coal Science & Technology 2024年第3期11卷 149-158页

作者： Zhenchao Yao Yugao Wang Jun shen Yanxia Niu Jiang Feng Yang Xianyong Wei School of Chemical Engineering and Technology Taiyuan University of TechnologyTaiyuanShanxi030024China Key Laboratory of Coal Processing and Efficient Utilization Ministry of EducationUniversity of Mining&Technology221116XuzhouJiangsuChina

CO_(2) mineralization plays a critical role in the storage and utilization of CO_(2).Coal fly ash(CFA)and red mud(RM)are widely utilized as CO_(2) ***,the inert calcium species in CFA limit its carbonation capacity,meanwhile the substantial Ca^(2+)releasing of RM is hindered by a covering layer of calcium *** this study,CO_(2) mineralization in a composite system of CFA and RM was investigated to enhance the carbonation *** analyzers were employed to characterize the raw materials and resulting mineralization *** results demonstrated that a synergistic effect existed in the composite system of CFA and RM,resulting in improving CO_(2) mineralization rate and *** produced calcium carbonate was ectopically attached the surface of CFA in the composite system,thus slowing down its coverage on the surface of *** phenomenon facilitated further releasing Ca^(2+)from the internal RM,thereby enhancing CO_(2) mineralization ***,the inclusion of RM significantly improved the alkalinity of the composite system,which not only promoted the dissolution of Ca^(2+)of the inert CaSO_(4)(h_(2)O)_(2) in CFA,but also accelerated CO_(2) mineralization *** investigation would be beneficial to CO_(2) mineralization using industrial solid wastes.

关键词： CO_(2)mineralization Coal fly ash Red mud Synergistic effect

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