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Fabricating sustainable lignin-derived porous carbon as electrode for high-performance supercapacitors

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Frontiers of Chemical Science and Engineering 2023年第8期17卷 1065-1074页

作者： Wei Liu Zhikun Li Ranran Sang jinsong Li Xueping Song Qingxi hou Guangxi Key Laboratory of Clean Pulp&Papermaking and Pollution Control College of Light Industry and Food EngineeringGuangxi UniversityNanning 530004China Tianjin Key Laboratory of Pulp&Paper Tianjin University of Science&TechnologyTianjin 300457China Mudanjiang hengfeng Paper Co. Ltd.Mudanjiang 157013China

Lignocellulosic biomass such as plants and agricultural waste are ideal to tackle the current energy crisis and energy-related environmental ***-rich lignin is abundant in lignocellulosic biomass,whose high-value transformation and utilization has been the most urgent problem to be ***,we propose a method for the preparation of porous carbon from lignin employing an h_(3)PO_(4)-assisted hydrothermal *** characterize the as-prepared lignin-derived porous carbon and investigate its potential for energy *** assisted hydrothermal treatment followed by carbonization at 800℃,the lignin-derived porous carbon displays a high specific capacitance(223.6 F·g^(–1) at 0.1 A·g^(–1))and excellent cycling ability with good capacitance *** this present study,the resultant lignin-derived porous carbon was used as the electrode of a supercapacitor,illustrating yet another potential high-value use for lignin,namely as a candidate for the sustainable fabrication of main supercapacitor components.

关键词： lignin porous carbon electrode supercapacitor

Specific generation of nitric oxide in mitochondria of cancer cell for selective oncotherapy

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Nano Research 2022年第6期15卷 5273-5278页

作者： Mengyu Sun Yanjuan Sang Qingqing Deng Zhengwei Liu jinsong Ren Xiaogang Qu Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China University of Chinese Academy of Sciences Beijing 100039China

Nitric oxide(NO)gas therapy,especially,L-arginine(L-Arg)-based NO treatment strategies have attracted extensive attention in the field of ***,current strategies are unable to differentiate well between normal cells and cancer cells,which may lead to unpredictable *** by the fact that mitochondria of cancer cells can express excessive nitric oxide synthetase(NOS),herein,a nanozyme-based NO generator,cerium oxide(CeO_(2))-AT,is fabricated to specifically catalyze the production of NO in cancer cells for selective tumor *** this system,after being endocytosed into cancer cells,the generator can produce a number of NO under the catalysis of NOS in mitochondria of cancer cells,which can disrupt the mitochondrial respiratory chain of tumor cells and further induce cell *** addition,the generator with catalase(CAT)-like activity can catalyze h_(2)O_(2)to produce O_(2),which can promote the generation of NO and improve the performance of NO gas *** is more,our system has no obvious impact on the viability of normal cells owing to the less production of *** work paves a new way for the development of highly selective NO-based treatment particularly useful for the safe and specific cancer therapy.

关键词： nitric oxide nitric oxide synthetase nanozyme mitochondria specific cancer therapy

Structural evolution of chars from biomass components pyrolysis in a xenon lamp radiation reactor

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Chinese Journal of Chemical Engineering 2017年第2期25卷 232-237页

作者： haizhou Lin Shurong Wang Li Zhang Bin Ru jinsong Zhou Zhongyang Luo State Key Laboratory of Clean Energy Utilization Zhejiang University Hangzhou 310027 China

The structural evolution of the chars from pyrolysis of biomass components （cellulose, hemicellulose and lignin） in a xenon lamp radiation reactor was investigated. The elemental composition analysis showed that the C content increased at the expense of h and O contents during the chars formation. The values of Ah/C/ZSO/c for the formation of cellulose and hemicellulose chars were close to 2, indicating that dehydration was the dominant reaction. Meanwhile, the value was more than 3 for lignin char formation, suggesting that the occurrence of demethoxylation was prevalent. FTIR and XRD analyses further disclosed that the cellulose pyrolysis needed to break down the stable crystal structure prior to the severe depolymerization. As for hemicellulose and lignin pyrolysis, the weak branches and linkages decomposed firstly, followed by the major decomposition. After the devolatilization at the main pyrolysis stage, the three components encountered a slow carbonization process to form condensed aromatic chars. The SEM results showed that the three components underwent different devolatilization behaviors, which induced various surface mornhologies of the chars.

关键词： Biomass componentsPyrolysisCharStructural characterization

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铜冶炼烟尘加压浸出及物相演变行为

中国有色金属学报 2024年第6期34卷 2072-2083页

作者：王阳波李存兄成圳王启亮罗劲松宋健清毛罗滨邓戈胡一平昆明理工大学冶金与能源工程学院昆明650093 云南铜业股份有限公司西南铜业分公司昆明650102

铜冶炼烟尘是火法炼铜过程产出的高附加值二次资源,为实现其中铜、锌等有价金属的浸出及砷的分离,本文研究铜烟尘加压浸出及同步沉砷新工艺技术参数优化与过程物相演变规律。结果表明:在反应温度由140℃升高至160℃过程中,锌、铜浸出率... 详细信息

铜冶炼烟尘是火法炼铜过程产出的高附加值二次资源,为实现其中铜、锌等有价金属的浸出及砷的分离,本文研究铜烟尘加压浸出及同步沉砷新工艺技术参数优化与过程物相演变规律。结果表明:在反应温度由140℃升高至160℃过程中,锌、铜浸出率分别可达96%和97%,砷沉淀率由36%提高至92%,砷沉淀形态由非晶形砷酸铁(FeAsO_(4)·n h_(2)O,n≠2)向晶型砷酸铁(FeAsO_(4)·2h_(2)O)演变;整个反应过程显著分为以锌、铜高效浸出(0~60 min)和砷铁共沉淀(60~180 min)两个阶段;增大搅拌转速、提高液固比可进一步提升体系的氧化传质速率和砷酸铁矿化物相-臭葱石生成速率。在反应温度160℃、时间3 h、初始酸度40 g/L、液固比5∶1、搅拌转速600 r/min的优化技术参数条件下,锌、铜浸出率均可达96%以上,砷沉淀率可达92%,浸出渣主要物相为硫酸铅与臭葱石,实现了锌、铜的深度浸出和砷的高效分离。

关键词：铜冶炼烟尘加压浸出锌、铜浸出率臭葱石

Gradient Structured Copper by Rotationally Accelerated Shot Peening

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Journal of Materials Science & Technology 2017年第7期33卷 758-761页

作者： X.Wang Y.S.Li Q.Z.ang Y.h.Zhao Y.T.Zhu Nano Structural Materials Center School of Materials Science and Engineering Nanjing University of Science and Technology Nanjing 210094 China School of Mechanical Engineering Nanjing University of Science and Technology Nanjing 210094 China Department of Materials Science and Engineering North Carolina State University Raleigh NC 27695 USA

A new technology-rotationally accelerated shot peening（RASP）, was developed to prepare gradient structured materials. By using centrifugal acceleration principle and large steel balls, the RASP technology can produce much higher impact energy compared to conventional shot peening. As a proof-of-concept demonstration, the RASP was utilized to refine the surface layer in pure copper（Cu） with an average grain size of 85 nm. The grain size increases largely from surface downwards the bulk, forming an800 ？m thick gradient-structured surface layer and consequently a micro-hardness gradient. The difference between the RASP technology and other established techniques in preparing gradient structured materials is discussed. The RASP technology exhibits a promoting future for large-scale manufacturing of gradient materials.

关键词： Microstructure Rotationally accelerated shot peening Gradient structure hardness Copper

Multicolor Luminescent Carbon Nanoparticles： Synthesis, Supramolecular Assembly with Porphyrin, Intrinsic Peroxidase-Like Catalytic Activity and Applications

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Nano Research 2011年第9期4卷 908-920页

作者： Xiaohui Wang Konggang Qu Bailu Xu jinsong Ren Xiaogang Qu Division of Biological Inorganic Chemistry State Key Laboratory of Rare Earth Resource Utilization Laboratory of Chemical Biology Changchun Institute Of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022 China Graduate School of the Chinese Academy of Sciences Changchun Jilin 130022 China

Luminescent carbon nanoparticles （CNPs） are newcomers to the world of nanomaterials and have shown great impact in health and environmental applications as well as being promising building blocks for future nanodevices because of their fascinating photoluminescence and potential to serve as nontoxic replacements for traditional heavy-metals-based quantum dots. herein, fluorescent CNPs have been prepared from candle soot by re fluxing with hNO3 and subsequently separated by a single centrifugation. The CNPs can be represented by the empirical formula C1ho.677Oo.586No.o15Nao.069, and have a size of 20-100 nm, height of 3.0 nm, lifetime of 7.31 ns ＋ 0.06 ns and quantum yield of -1.7%. Further studies demonstrate that：（1）the as-prepared CNPs exhibit excellent stability in biological media and their luminescence intensity does not change with ionic strength or ph in the physiological and pathological range of ph 4.5-8.8; （2） CNPs can act as electron donors and transporters and porphyrin can assemble onto CNPs through electrostatic and ^-stacking interactions to form porphyrin-CNPs supramolecular composites; （3）CNPs have strong intrinsic peroxidase-like activity. Based on this intrinsic peroxidase activity, a simple, cheap, and highly selective and sensitive colorimetric and quantitative assay has been developed for the detection of glucose levels. This assay has been used to analyze real samples, such as diluted blood and fruit juice.

关键词： Carbon nanoparticles luminescence supramolecular assembly peroxidase biosensing

Radial profile of sap flow velocity in mature Xinjiang poplar(Populus alba L. var. pyramidalis) in Northwest China

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Journal of Arid Land 2014年第5期6卷 612-627页

作者： hongZhong Dang TianShan ZhA jinsong Zhang Wei LI ShiZeng LIU Institute of Desertification Studies Chinese Academy of Forestry School of Soil and Water Conservation Beijing Forestry University Research Institute of Forestry Chinese Academy of Forestry Gansu Desert Control Research Institute

Estimation of the transpiration rate for a tree is generally based on sap flow measurements within the hydro-active stem xylem. In this study, radial variation of sap flow velocity（Js） was investigated at five depths of the xylem（1, 2, 3, 5 and 8 cm under the cambium） in three mature Xinjiang poplar（Populus alba L. var. pyramidalis） trees grown at the Gansu Minqin National Studies Station for Desert Steppe Ecosystem from May to October 2011. Thermal dissipation probes of various lengths manufactured according to the Granier＇s design were installed into each tree for simultaneous observation of the radial patterns of Js through the xylem. The radial patterns were found to fit the four-parameter GaussAmp equation. The peak Js was about 27.02±0.95 kg/（dm2？d） at approximately 3 to 5 cm deep from the cambium of the three trees,and the lowest Js appeared at 1 cm deep in most of the time. Approximately 50% of the total sap flow in Xinjiang poplar occurred within one-third of the xylem from its outer radius, whereas 90% of the total sap flow occurred within two-fifth of the xylem. In addition, the innermost point of the xylem（at 8-cm depth）, which appeared as the penultimate sap flow in most cases during the study period, was hydro-active with Js,8 of 7.55±3.83 kg/（dm2？d）. The radial pattern of Js was found to be steeper in midday than in other time of the day, and steeper diurnal fluctuations were recorded in June, July and August（the mid-growing season）. Maximum differences between the lowest Js（Js,1 or Js,8） and the highest Js（Js,3 or Js,5） from May through October were 12.41, 17.35, 16.30, 18.52, 12.60 and 16.04 g/（cm2？h）, respectively. The time-dependent changes of Js along the radial profile（except at 1-cm depth） were strongly related to the reference evapotranspiration（ET0）. Due to significant radial variability of Js, the mean daily sap flow at the whole-tree level could be over-estimated by up to 29.69% when only a single probe at depth of 2 cm was used. however, t

关键词： sap flow radial pattern Populus alba L.var.pyramidalis reference evapotranspiration(ET0) Granier method

Validation of CFD-DEM simulation of a liquid-solid fluidized bed by dynamic analysis of time series

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Particuology 2022年第9期20卷 75-87页

作者： Julia Picabea Mauricio Maestri Miryan Cassanello Gabriel Salierno Cataldo De Blasio María angélica Cardona Daniel hojman héctor Somacal Departamento de Industrias Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresCiudad UniversitariaIntendente Güiraldes 2160C1428EGABuenos AiresArgentina CONICET-Universidad de Buenos Aires Instituto de Tecnología de Alimentos y Procesos Químicos-ITAPROQCiudad UniversitariaIntendente Güiraldes 2160 C1428EGABuenos AiresArgentina Faculty of Science and Engineering Abo Akademi UniversityRantakatu 265100 VaasaFinland Laboratorio de Diagnósticos por Radiaciones Dep.Física ExperimentalComisión Nacional de Energía AtómicaBKNA1650 San MartínBuenos AiresArgentina CONICET C1033AAJ Buenos AiresArgentina Escuela de Ciencia y Tecnología Universidad de San MartínBKNA 1650 San MartínBuenos AiresArgentina

Liquid-solid fluidized beds(LSFB)modeling validation is crucial for establishing design rules and monitor-ing ***,it generally relies on comparing global variables,which overlook dynamic features that influence reaction *** work aims to implement time series analysis tools to compare Radioactive Particle Tracking data with a simulation consisting of Computational Fluid Dynamics cou-pled with Discrete-Element *** have been performed in a pilot-scale LSFB of calcium alginate spheres fluidized with a calcium chloride *** Diks'test indicates that the simulation can capture the LSFB *** also allows diagnosing flow regime transitions from the *** of solid dispersion coefficients and mixing times predicted by the simulation are in good agreement with the experiments.

关键词： Liquid-solid fluidization CFD-DEM Dynamic comparison Radioactive particle tracking

A route for large-scale preparation of multifunctional superhydrophobic coating with electrochemically-modified kaolin for efficient corrosion protection of magnesium alloys

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Journal of Magnesium and Alloys 2022年第11期10卷 3082-3099页

作者： Xiang Liu Tian C.Zhang Yuxin Zhang jinsong Rao Shaojun Yuan Low-carbon Technology&Chemical Reaction Engineering Lab College of Chemical EngineeringSichuan UniversityChengdu 610065China Civil&Environmental Engineering Department University of Nebraska-LincolnOmahaNE 68182-0178USA State Key Laboratory of Mechanical Transmissions College of Materials Science and EngineeringChongqing UniversityChongqing 400044China

Superhydrophobic coating has been widely studied for its great applicational potential, such as for corrosion protection of magnesium alloys while it has been restrained by expensive materials, sophisticated preparation process and infirm rough structures. In this study, the electrochemical method was adopted by using a two-electrode system for rapid hydrophobic modification to obtain superhydrophobic *** mixing the modified superhydrophobic kaolin with commercial epoxy resin and polydimethylsiloxane glue, a paint can be formed and easily used on various substrates for preparation of superhydrophobic coating via spraying method. The influence factors on wettability of the modified kaolin and the mixing ratio of each component of the coating were explored. Also, the wettability, durability and anticorrosion of the prepared coating were evaluated comprehensively. The coating was able to maintain superhydrophobic after immersed in hCl solution at ph 1, the NaOh solution at ph 14, and 3.5 wt.% NaCl solution for 16, 21, 30 days, respectively. In addition, the coating exhibited 4A grade adhesion, high hydrophobicity after abraded for 200 cycles on a 600-mesh sandpaper with 100 g weight, and 99.86% anticorrosion efficiency after soaked in 3.5 wt.% NaCl solution for 20 days, demonstrating a good robustness and anti-corrosion property. Furthermore, the coating showed good transparency, flexibility and was easy to make in a large scale by the spraying method, which is of great significance to promote the practical application of superhydrophobic coatings and the anticorrosion Mg alloys.

关键词： Superhydrophobic coating Large-scale application Magnesium alloys Corrosion protection