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Low-temperature chlorination roasting technology for the simultaneous recovery of valuable metals from spent LiCoO_(2)cathode material

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 80-91页

作者： Junjie Shi Changle Hou jingjing dong dong Chen Jianzhong Li Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China

With the continuous increase in the disposal volume of spent lithium-ion batteries(LIBs),properly recycling spent LIBs has become essential for the advancement of the circular *** study presents a systematic analysis of the chlorination roasting kinetics and proposes a new two-step chlorination roasting process that integrates thermodynamics for the recycling of LIB cathode *** activation energy for the chloride reaction was 88.41 kJ/mol according to thermogravimetric analysis–derivative thermogravimetry data obtained by using model-free,model-fitting,and Z(α)function(αis conversion rate).Results indicated that the reaction was dominated by the first-order(F1)model when the conversion rate was less than or equal to 0.5 and shifted to the second-order(F2)model when the conversion rate exceeded *** conditions were determined by thoroughly investigating the effects of roasting temperature,roasting time,and the mass ratio of NH_(4)Cl to LiCoO_(2).Under the optimal conditions,namely 400℃,20 min,and NH_(4)Cl/LiCoO_(2)mass ratio of 3:1,the leaching efficiency of Li and Co reached 99.43% and 99.05%,*** of the roasted products revealed that valuable metals in LiCoO_(2)transformed into CoCl_(2) and ***,the reaction mechanism was elucidated,providing insights for the establishment of a novel low-temperature chlorination roasting technology based on a crystal structure *** technology can guide the development of LIB recycling processes with low energy consumption,low secondary pollution,high recovery efficiency,and high added value.

关键词： spent lithium-ion battery thermodynamics chlorination roasting kinetics circular economy

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Defect-enhanced photocatalytic removal of dimethylarsinic acid over mixed-phase mesoporous TiO2

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Journal of Environmental Sciences 2020年第5期32卷 35-42页

作者： jingjing dong Chengzhi Hu Weixiao Qi Xiaoqiang An Huijuan Liu Jiuhui Qu Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China

Much attention has been paid to the pollutant dimethylarsenic acid(DMA),because of its high toxicity even at very low *** TiO2 photocatalytic oxidation(PCO)is one of the few effective methods for treating DMA-containing water,the efficient decomposition of DMA and simultaneous removal of toxic arsenic species remains a significant but challenging ***,defective mesoporous TiO2 with mixed-phase structure was synthesized and used as both photocatalyst and adsorbent for DMA *** to the reduced band-gap and enhanced separation of photogenerated charge carriers,the oxygen-deficient TiO2 nanostructures exhibited 4.2 times higher PCO efficiency than commercial TiO2(P25).More importantly,the high surface area of the mesoporous TiO2 provided sufficient active sites for in-situ adsorption and reaction,resulting in the efficient removal of as-formed As(V).Combining the experimental and characterization results,the different roles of reactive species during PCO reactions were *** the presence of hole(h+)as the dominant oxidation species,DMA was demethylated and transformed into ***,MMA was subsequently reduced to As(Ⅲ)by photo-generated *** radicals(O2·-)played a significant role in oxidizing As(Ⅲ)into As(Ⅴ),which was finally adsorptively removed by the mesoporous TiO2.

关键词： Mesoporous TiO2 Dimethylarsinic acid Adsorption Photocatalysis Oxygen vacancy

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Quantitative analysis of work hardening and dynamic softening behaviors of Cu-6 wt pct Ag binary alloy based on true stress vs strain curves

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Acta Metallurgica Sinica(English Letters) 2012年第6期25卷 420-434页

作者： Menghan WANG Wenhao WANG jingjing dong Linhui ZHANG Yunping LI Akihiko CHIBA School of Material Science and Engineering Chongqing University Chongqing 400044 China Institute for Materials Research Tohoku University Sendai 980-8577 Japan

The work hardening and dynamic softening behaviors of Cu-6 wt pct Ag binary alloy were studied by hot compression tests under temperature range of 700-850℃ at strain rates of *** critical conditions for the onset of dynamic recrystallization （DRX） were determined based on the conventional strain hardening rate curves （dσ/dε versus σ）.The progress of DRX was analyzed by constructing a model of volume fraction of DRX based on flow *** strain rate sensitivity （SRS） and activation volume V were *** results show that the DRX almost can happen under all deformation conditions even at high Z deformations where dynamic recovery （DRV） is the main softening *** DRX fraction curves can well predict the DRX *** strain has significant effects on SRS at the strain rates of 0.01s-1 and 10s-1 which are mainly due to off-equilibrium saturation of dislocation storage and annihilation while the effects of the temperature on the SRS are based on the uniformity of microstructure *** formation of ＂forest＂ of dislocation is contributed to the low activation volume V＊（about 168b3） which is independent of Z values at the initial *** cross-slip due to dislocation piled up beyond the grain boundaries or obstacles is related to the low activation volume under the high Z deformation conditions at high strain （ε=0.6） while the fine DRX grains coarsed is the main reason for the high activation volume at low Z under the same strain conditions.

关键词： Cu-Ag alloy Work hardening Dynamic recrystallization Strainrate sensitivity Activation volume

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Multi-Model Ensemble Deep Learning Method to Diagnose COVID-19 Using Chest Computed Tomography Images

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Journal of Shanghai Jiaotong university(Science) 2022年第1期27卷 70-80页

作者： WANG Zhiming dong jingjing ZHANG Junpeng College of Electrical Engineering Sichuan UniversityChengdu 610056China Key Laboratory of Aerospace Medicine of Ministry of Education Air Force Medical UniversityXi’an 710032China Lintong Rehabilitation and Recuperation Center PLA Joint Logistic Support ForceXi’an 710600China

Deep learning based analyses of computed tomography(CT)images contribute to automated diagnosis of COVID-19,and ensemble learning may commonly provide a better ***,we proposed an ensemble learning method that integrates several component neural networks to jointly diagnose *** ensemble strategies are considered:the output scores of all component models that are combined with the weights adjusted adaptively by cost function back propagation;voting strategy.A database containing 8347 CT slices of COVID-19,common pneumonia and normal subjects was used as training and testing *** show that the novel method can reach a high accuracy of 99.37%(recall:0.9981;precision:0.9893),with an increase of about 7% in comparison to single-component *** the average test accuracy is 95.62%(recall:0.9587;precision:0.9559),with a corresponding increase of 5.2%.Compared with several latest deep learning models on the identical test set,our method made an accuracy improvement up to 10.88%.The proposed method may be a promising solution for the diagnosis of COVID-19.

关键词： COVID-19 deep learning computed tomography(CT)images ensemble model convolutional neural network

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A low-power DC offset calibration method independent of IF gain for zero-IF receiver

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Science China(Information Sciences) 2014年第10期57卷 213-222页

作者： dong jingjing JIANG HanJun ZHANG LingWei WEI JianJun LI FuLe ZHANG Chun WANG ZhiHua Tsinghua National Laboratory for Information Science and Technology Institute of Microelectronics Tsinghua University Research Institute of Tsinghua University in Shenzhen

A novel low-power DC offset calibration(DCOC) method independent of intermediate frequency(IF) gain for zero-IF receiver applications has been reported. The conventional analog DCOC method consumes greater power and affects the performance of the receiver. The conventional mixed-signal method requires enhanced memory to store the calibration results at different receiver gains as the DC offset is relative to the radio frequency(RF) and IF gain. A novel algorithm is presented to make the DCOC process independent of IF gain, which significantly reduces the memory area. With the proposed circuit, the receiver calibrates only once so settle-time and power consumption of the IF circuit is lowered. A DCOC circuit with the proposed method is manufactured in 0.18 μm CMOS technology that drains nearly 0 mA equivalent current from a 1.8 V power supply.

关键词： DC offset calibration zero-IF receiver PGA digital to analog converter comparator

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Angiotensin I converting enzyme(ACE)inhibitory activity and antihypertensive effects of rice peptides

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Food Science and Human Wellness 2022年第6期11卷 1539-1543页

作者： jingjing dong Shen Wang Xiaoyao Yin Min Fang Zhiyong Gong Yongning Wu Key Laboratory for Deep Processing of Major Grain and Oil of Ministry of Education College of Food Science and EngineeringWuhan Polytechnic UniversityWuhan 430023China HC Key Laboratory of Food Safety Risk Assessment Food Safety Research Unit(2019RU014)of Chinese Academy of Medical ScienceChina National Center for Food Safety Risk AssessmentBeijing 100021China

In this paper,the antihypertension effect of rice peptide(RP)was *** spontaneously hypertensive rats(SHR)and Wistar Kyoto(WKY)as the research objects,RP disposable gastric and long-term gastric irrigation experiments were carried out and systolic blood pressure(SBP)was *** the end of the long-term gastric irrigation experiment,the content of nitric oxide(NO),angiotensin-converting enzyme(ACE),angiotensin II(Ang II)and renin in the plasma and the activity of ACE were *** results showed that RP could reduce systolic pressure of SHR and had time-dose dependence while high-dose RP signifi cantly reduced systolic pressure by 24.6 and 17.2 mm Hg,respectively after a single and long-term gastric irrigation *** also could inhibit the activity of ACE and increase the release of *** results suggested that the decompression mechanism of RP is likely to be related to the regulation of the renin-angiotensin system(RAS)and NO.

关键词： Rice peptide Angiotensin-converting enzyme(ACE) Antihypertensive effect

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Phase equilibria relations in the V_(2)O_(5)-rich part of the Fe_(2)O_(3-)TiO_(2)-V_(2)O_(5) system at 1200℃ related to converter vanadium-bearing slag

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International Journal of Minerals,Metallurgy and Materials 2024年第9期31卷 2017-2024页

作者： Junjie Shi Yumo Zhai Yuchao Qiu Changle Hou jingjing dong Maoxi Yao Haolun Li Yongrong Zhou Jianzhong Li Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China

The efficient recycling of vanadium from converter vanadium-bearing slag is highly significant for sustainable development and circular *** key to developing novel processes and improving traditional routes lies in the thermodynamic *** this study,the equilibrium phase relations for the Fe_(2)O_(3)-TiO_(2)-V_(2)O_(5)system at 1200℃in air were investigated using a high-temperature equilibrium-quenching technique,followed by analysis using scanning electron microscopy-energy dispersive X-ray spectrometer and X-ray photoelectron *** liquid-phase region,two two-phase regions(liquid-rutile and liquid-ferropseudobrookite),and one three-phase region(liquid-rutile-ferropseudobrookite)were *** variation in the TiO_(2)and V_(2)O_(5)contents with the Fe_(2)O_(3)content was examined for rutile and ferropseudobrookite solid ***,on further comparison with the predictions of FactSage 8.1,significant discrepancies were identified,highlighting that greater attention must be paid to updating the current thermodynamic database related to vanadium-bearing slag systems.

关键词： vanadium-bearing slag thermodynamics FactSage phase equilibria recovery

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Visible-light deposition of CrO_(x) cocatalyst on TiO_(2):Cr valence regulation for superior photocatalytic CO_(2)reduction to CH_(4)

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Journal of Energy Chemistry 2022年第1期31卷 103-112,I0004页

作者： jingjing dong Yuan Kong Heng Cao Zhiyu Wang Zhirong Zhang Lidong Zhang Song Sun Chen Gao Xiaodi Zhu Jun Bao National Synchrotron Radiation Laboratory Collaborative Innovation Center of Chemistry for Energy MaterialsUniversity of Science and Technology of ChinaHefei 230029AnhuiChina Hefei National Laboratory for Physical Science at the Microscale and Department of Chemical Physics Synergetic Innovation Center of Quantum Information and Quantum PhysicsUniversity of Science and Technology of ChinaHefei 230026AnhuiChina School of Chemistry and Chemical Engineering Anhui UniversityHefei 230601AnhuiChina School of Physical Science University of Chinese Academy of SciencesBeijing 100049China

Photodeposition is widely adopted for implanting metal/metal oxide cocatalysts on ***,it is prerequisite that the photon energy should be sufficient to excite the host ***,we report a lower-energy irradiation powered deposition strategy for implanting CrO_(x) cocatalyst on TiO_(2).Excitingly,CrO_(x)-400 implanted under visible-light irradiation significantly promotes the CH4 evolution rate on TiO_(2)to 8.4μmolg·^(-1)h^(-1) with selectivity of98%from photocatalytic CO_(2)reduction,which is 15 times of that on CrO_(x)-200 implanted under UV-visible-light ***,CrO_(x)-400 is identified to be composed of higher valence Cr species compared to CrO_(x)-*** valence states regulation of Cr species is indicated to provide more active sites for CO_(2) adsorption/activation and to modulate the reaction mechanism from single Cr site to Cr-Cr dual sites,thus endowing the superior CH_(4)*** work demonstrates an alternative strategy for constructing efficient metal oxides cocatalysts on wide bandgap semiconductor.

关键词： Valence states regulation CrO_(x)cocatalyst Lower-energy irradiation Photocatalytic CO_(2)reduction High CH_(4)selectivity

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New fossil ommatid (Coleoptera:Archostemata:Ommatidae) from Jehol Biota of western Liaoning, China

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Progress in Natural Science:Materials International 2006年第6期16卷 639-643页

作者： REN dong, TAN jingjing and GE Siqin (College of Life Science, Capital Normal University, Beijing 100037, China Institute of Zoology, Chinese Academy of Sciences, Beijing 100080, China) College of Life Science Capital Normal University Beijing 100037 China Institute of Zoology Chinese Academy of Sciences Beijing 100080 China

In this paper one new genus and one new species of fossil ommatid, Odontomma trachylaena gen. et sp. nov., is described and illustrated from the Late Jurassic or Early Cretaceous Yixian Formation of western Liaoning, China. Based on wide epipleural space of elytron with several rows of cells, the new taxa is attributed to tribe Brochocoleini of Ommatidae and compared with genus Bro-chocoleus. Due to the fact that most other Chinese Mesozoic ommatids are not complete, the complete preservation of the new specimens reported here enabled us to determine the characteristics of the body of these ancient ommatid. Moreover, based on the well-preserved individual of this new genus, we may suppose the affinities of the new species with extant and extinct groups.

关键词： Ommatidae Late Jurassic Early Cretaceous Liaoning Province.

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Advances in the Study of Antitumor Activity and Mechanism of Antipsychotic Drug Brexpiprazole

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Medicinal Plant 2024年第5期15卷 81-84页

作者： jingjing dong Yuqiong LI Ruifen SUN School of Yunnan University of Traditional Chinese Medicine Kunming 650500China

Antipsychotics such as phenothiazines,pimozide,flupentixol and brexpiprazole have been shown to have good antitumor ***,the successor to aripiprazole,has a better safety *** promotes the death of tumor cells by inhibiting the prolif-eration of tumor stem cells,resolving the resistance of tumor cells to EGFR-TKIs,and promoting the sensitivity of tumor cells to chemothera-peutic agents,thus inhibiting the development of colorectal,lung,glioblastoma,pancreatic,and gastric *** review focuses on the antitumor effects of antipsychotic drugs,especially the inhibitory effect of brexpiprazole on tumor cells,aiming to provide a theoretical basis for antipsychotic drugs in antitumor field.

关键词： Antipsychotics Brexpiprazole Cancer therapy

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