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Micropores regulating enables advanced carbon sphere catalyst for Zn-air batteries

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green Energy & Environment 2023年第1期8卷 308-317页

作者： Jingsha li Shijie Yi Ranjusha Rajagopalan Zejie Zhang Yougen tang Haiyan Wang Hunan Provincial Key Laboratory of Chemical Power Sources Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese ResourcesCollege of Chemistry and Chemical EngineeringCentral South UniversityChangsha410083China Institute of Materials Science and Devices Suzhou University of Science and TechnologySuzhou215011China

Energy conversion technologies like fuel cells and metal-air batteries require oxygen reduction reaction(ORR)electrocatalysts with low cost and high catalytic ***,N-doped carbon spheres(N-CS)with rich micropore structure have been synthesized by a facile two-step method,which includes the polymerization of pyrrole and formaldehyde and followed by a facile pyrolysis *** the preparation,zinc chloride(ZnCl2)was utilized as a catalyst to promote polymerization and provide a hypersaline *** addition,the morphology,defect content and activity area of the resultant N-CS catalysts could be regulated by controlling the content of *** optimum N-CS-1 catalyst demonstrated much better catalytic activity and durability towards ORR in alkaline conditions than commercial 20 wt%Pt/C catalysts,of which the half-wave potential reached 0.844 V *** applied in the Zn-air batteries as cathode catalysts,N-CS-1 showed a maximum power density of 175 mW cm^(-2) and long-term discharging stability of over 150 h at 10 mA cm^(-2),which outperformed 20 wt%Pt/*** excellent performance could be due to its ultrahigh specific surface area of 1757 m2 g1 and rich micropore channels ***,this work provides an efficient method to synthesize an ultrahigh surface porous carbon material,especially for catalyst application.

关键词： Zn-air batteries Oxygen reduction reaction N-doped carbon spheres Micropores Ultrahigh specific surface

MELK is an oncogenic kinase essential for metastasis,mitotic progression,and programmed death in lung carcinoma

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Signal Transduction and Targeted Therapy 2021年第1期6卷 83-94页

作者： Qin tang Wan li Xiangjin Zheng liwen Ren Jinyi liu Sha li Jinhua Wang guanhua Du The State Key Laboratory of Bioactive Substance and Function of Natural Medicines BeijingChina Key Laboratory of Drug Target Research and Drug Screen Institute of Materia MedicaChinese Academy of Medical Science and Peking Union Medical College100050 BeijingChina

Lung cancer is the fastest growth rate of morbidity and mortality in nearly a decade,and remains difficult to ***,the molecular mechanisms underlying its development are still *** this study,bioinformatics analysis showed that MELK was highly expressed in lung cancer and negatively correlated to the survival of lung adenocarcinoma(LUAD).Immunohistochemistry analysis of LUAD patient tissues revealed there were a high level of MELK expression in *** of MELK expression inhibits the migration and invasion of LUAD cells,which may be mediated by Twist1,Slug,MMP7,and *** of MELK promoted the growth of LUAD cells in medium,3D Matrigel,and nude *** of MELK by OTSSP167 arrested cycle of LUAD cells at g2/M phase via PLK1-CDC25C-CDK1 pathway,and triggered apoptosis-mediated ***,these data indicate that MELK is critical for metastasis,mitotic progression,and programmed death of LUAD and may be a promising therapeutic target for LUAD.

关键词： metastasis PLK1 lung

Quantification of perfluorinated compounds in atmospheric particulate shows potential connection with environmental event

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Journal of Environmental Sciences 2024年第2期136卷 237-247页

作者： Hua tang Ying Wang Shengling Si Hongli li David Da Yong Chen National Institute of Metrology 18 BeisanhuandongluChaoyang DistrictBeijing 100029China School of Chemistry and Materials Science Nanjing Normal UniversityNanjing 210023China Si Chuan Zhong Ce Biao Wu Technology Co.Ltd. Sichuan 610052China Department of Chemistry University of British ColumbiaVancouver V6T 1Z1BCCanada

A method of quantification of perfluorinated compounds(PFCs)from atmospheric particulate matter(APM)is described.A single step pretreatment method,selective pressurized liquid extraction(SPLE),was developed to reduce the high matrix background and avoid contamination from commonly used multiple sample pretreatment *** effective sorbent was selected to purify the PFCs during SPLE,followed by liquid chromatography-tandem mass spectrometry(LC–MS/MS),for quantification of *** affecting the SPLE efficiency,including temperature,static extraction time,and number of extraction cycles used,were *** optimum conditions were found to be 120℃,10 min,and 3 cycles,***-MS/MS method was developed to obtain the optimal sensitivity specific to *** method detection limits(MDLs)were 0.006 to 0.48 ng/g for the PFCs studied and the linear response range was from 0.1 to 100 ng/*** ensure accurate values were obtained,each step of the experiment was evaluated and controlled to prevent *** optimized method was tested by performing spiking experiments in natural particulate matter matrices and good rates of recovery and reproducibility were obtained for all target ***,the method was successfully used to measure 16 PFCs in the APM samples collected in Beijing over five years from 2015 to *** is observed that some PFCs follow the trend of total PFC changes,and can be attributed to the environment influencing events and policy enforcement,while others don't seem to change as much with time of the year or from year to year.

关键词： Selective pressurized liquid extraction liquid chromatography-mass spectrometry Perfluorinated compounds Atmospheric particulate matter Pollution control

Meta-analysis of combined therapy for adult hepatitis B virus-associated glomerulonephritis

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World Journal of gastroenterology 2012年第8期18卷 821-832页

作者： Xiao-Yong Zheng Ri-Bao Wei li tang Ping li Xiao-Dong Zheng Department of Nephrology General Hospital of Chinese PLA Beijing 100853 China Department of Ophthalmology Ehime University School of Medicine Ehime 791-0295 Japan

aiM: To investigate the efficacy and safety of combined antiviral and immunosuppressant therapy in adult hepatitis B virus-associated glomerulonephritis (HBVgN) patients. METHODS: A computerized literature search was carried out in the PubMed database, Embase, the Cochrane library, Chinese BioMedical literature on disc, Chinese Medical Current Contents, Chinese National Knowledge Infrastructure, Wanfang and VIP (Chinese Technological Journal of Database) to collect articles between June 1980 and December 2010 on therapy with immunosuppressants, e.g., glucorticosteroids, mycophenolate mofetil and leflunomide, combined with antivirals, e.g., interferon, lamivudine, entecavir and adefovir dipivoxil, in adult HBV-gN patients. The primary outcomes were remission of proteinuria, clearanceof HBV e-antigen, and elevation of serum albumin. The secondary outcomes were blood levels of alanine aminotransferase, serum creatinine, and HBV-DNA titer. Meta-analysis was performed using Review Manager 5.1. Fixed or random effect models were employed to combine the results after a heterogeneity test. The effects of the combined therapy were analyzed for different doses of glucorticosteroid and different types of HBV-gN. RESULTS: Twelve clinical trials with 317 patients were included. A significantly higher incidence of HBV-gN was found in male patients (relative risk = 2.40, 95% CI: 1.98-2.93). Combined therapy reduced the proteinuria significantly with a mean difference of 4.19 (95% CI: 3.86-4.53) and increased the serum albumin concentration significantly with a mean difference of -11.95 (95% CI: -12.97-10.93) without significant alterations of liver function (mean difference: 4.62, 95% CI: -2.55-11.79) and renal function (mean difference: 10.29, 95% CI: 0.14-20.45). No signif icant activation of HBV-DNA replication occurred (mean difference: 0.12, 95% CI: -0.37-0.62). There was no significant difference between the high dose glucorticosteroid group and the low dose glucorticosteroi

关键词： Meta-analysis Hepatitis B virus-associatedglomerulonephritis glucocorticoids Immunosuppressant Antiviral drug

Sustainable management of campus fallen leaves through low-temperature pyrolysis and application in Pb immobilization

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Journal of Environmental Sciences 2024年第5期139卷 281-292页

作者： Rongli Tan Ke li Yue Sun Xiaoliang Fan Zhengtao Shen lingyi tang School of Environment Nanjing UniversityNanjing 210023China School of Chemistry and Chemical Engineering Nanjing UniversityNanjing 210023China School of Earth and Engineering Sciences Nanjing UniversityNanjing 210023China Department of Earth and Atmospheric Sciences University of AlbertaEdmonton T6G 2E3Canada

Realizing campus sustainability requires the environmental-friendly and economical treatment of tremendous fallen *** fallen leaf biochar at a low temperature is a candidate *** this study,six common types of fallen leaves on the campus were pyrolyzed at 300℃.The obtained biochars were characterized and the adsorption mechanisms of lead(Pb)by the fallen leaf biochars were *** adsorption capacity of leaf biochar for Pb was relatively high,up to 209 mg/g(Yulania denudata leaf biochar).Adsorption of Pb onto active sites was the rate-limiting step for most leaf *** for Platanus leaf biochar,intraparticle diffusion of Pb^(2+)dominated owing to the lowest adsorption ***,the highest exchangeable Pb fraction(27%)indicated its potential for removing aqueous Pb^(2+).ginkgo and Prunus cerasifera leaf biochar immobilized Pb by surface complexation and precipitation as lead ***,they were suitable for soil heavy metal *** study shed the light on the sustainable utilization of campus fallen leaves and the application of fallen leaf biochars in heavy metal remediation.

关键词： Fallen leaves Waste management Biochar Lead removal Sorption Circular campus

Control the growth of Fe3O4 on the surface of saponite and its redox effect on Cr(VI)

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Progress in Natural Science:Materials International 2023年第5期33卷 701-709页

作者： Ritong Huang limei Wu Xiao li Ning tang Xiaolong Wang lili gao School of Materials Science and Engineering Shenyang Jianzhu University School of Mechanical Engineering Shenyang Jianzhu University

In this paper, Magnetite/Saponite(Fe3O4/Sap) composites were prepared by hydrothermal synthesis and coprecipitation. The prepared Fe3O4/sap composites had high purity and good crystallinity, and nano-Fe3O4was uniformly dispersed on the surface of saponite. Moreover, the removal efficiency of Fe3O4/Sap composites for Cr(VI) in water was evaluated. This study revealed the existence of abundant oxygen vacancies and hydroxyl groups on the surface of Saponite. During the synthesis of Fe3O4on the surface of Sap, the multi-directional crystallization can be controlled to increase the reaction activity of the system. Besides, the prepared Fe3O4/Sap composites provided more reactive edges compared to Fe3O4in the process of removing Cr(VI). The removal amount of Cr(VI) was found to be 17.95 mg/g. The successful preparation of the Fe3O4/Sap composites and the revelation of the Cr(VI) adsorption mechanism are of great significance for the efficient and green removal of heavy metal pollutants in sewage.

关键词： Fe 3 O 4 Saponite Oxygen vacancy Redox Cr (VI)

Carbon-coated MoS_(2) nanosheets@CNTs-Ti_(3)C_(2) MXene quaternary composite with the superior rate performance for sodium-ion batteries

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Journal of Materials Science & Technology 2022年第5期100卷 101-109页

作者： Fengyi He Cheng tang Yadong liu Haitao li aijun Du Haijiao Zhang Institute of Nanochemistry and Nanobiology Shanghai UniversityShanghai 200444China School of Chemistry Physics and Mechanical EngineeringScience and Engineering FacultyQueensland University of TechnologyBrisbaneQLD 4001Australia

The exploration of advanced MoS_(2)-based electrode materials overcoming their inherent low conductivity and large volume changes is of importance for next-generation energy *** this work,we report a simple and high-efficient one-pot hydrothermal approach to prepare a unique and stable 1D/2D *** the architecture,ultrathin carbon layer-coated MoS_(2) nanosheets with large expanded interlayer of 1.02 nm are vertically grown onto the Ti_(3)C_(2) MXene and cross-linked carbon nanotubes(CNTs),giving rise to a highly conductive 3D *** interlayer expanded MoS_(2) nanosheets can greatly facilitate the Na ions/electrons ***,the N-doped 1D/2D CNTs-Ti_(3)C_(2) matrix can be used as a strong mechanical support to well relieve the large volume expansion upon *** a combination result of several advantages,the developed quaternary C-MoS_(2)/CNTs-Ti_(3)C_(2) composite anode shows an excellent sodium storage performance(562 mA h g^(-1) at 100 mA g^(-1) after 200 cycles)and rate capability(475 mA h g^(-1) at 2000 mA g^(-1)).The density functional theory calculations further prove that the full combination of layer-expanded MoS_(2) nanosheets and N-doped Ti_(3)C_(2) matrix can significantly enhance the adsorption energy of Na ions,further resulting in the enhancement of sodium storage capabilities.

关键词： MoS_(2)nanosheets Ti_(3)C_(2)MXene Quaternary composite Nitrogen doping Sodium-ion batteries

Metal-nitrogen-doped hybrid ionic/electronic conduction triple-phase interfaces for high-performance all-solid-state lithium-sulfur batteries

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Nano Research 2023年第8期16卷 10956-10965页

作者： Hao li Jiangping Song Fanglin Wu Rui Wang Dan liu Haolin tang A State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Chemistry School of ChemistryChemical Engineering and Life SciencesWuhan University of TechnologyWuhan 430070China

The point-to-point contact mechanism in all-solid-state li-S batteries(ASSLSBs)is not as efficient as a liquid electrolyte which has superior mobility in the electrode,resulting in a slower reaction kinetics and inadequate ionic/electronic conduction network between the S(or li_(2)S),conductive carbon,and solid-state electrolytes(SSEs)for achieving a swift(dis)charge ***,a series of hybrid ionic/electronic conduction triple-phase interfaces with transition metal and nitrogen co-doping were *** graphitic ordered mesoporous carbon frameworks(TM-N-OMCs;TM=Fe,Co,Ni,and Cu)serve as hosts for li_(2)S and li_(6)PS_(5)Cl(LPSC)and provide abundant reaction sites on the triple *** from both experimental and computational research display that the combination of Cu-N co-dopants can promote the li-ion diffusion for rapid transformation of li_(2)S with adequate ionic(6.73×10^(−4)S·cm^(−1))/electronic conductivities(1.77×10^(−2)S·cm^(−1))at 25℃.The as-acquired li_(2)S/Cu-N-OMC/LPSC electrode exhibits a high reversible capacity(1147.7 mAh·g^(−1))at 0.1 C,excellent capacity retention(99.5%)after 500 cycles at 0.5 C,and high areal capacity(7.08 mAh·cm^(−2)).

关键词： all-solid-state lithium-sulfur batteries triple-phase interfaces ordered mesoporous carbons mixed ion/electron conductivities li_(6)PS_(5)Cl solid electrolyte

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低温低压下活性炭吸附氢气的分子模拟

天津大学学报（自然科学与工程技术版） 2025年第1期58卷 81-90页

作者：唐忠利王子瑶吴甜甜李文彬张东辉天津大学化工学院天津300350

低温吸附法处理激光尾气中的H_(2)相较于传统尾气处理方法具有体积小、质量轻、运行成本低、无振动噪声等特点,其关键问题是开发低温低压条件下高性能的H_(2)吸附剂.以石墨片微元构建多孔活性炭模型,使用巨正则蒙特卡罗(gCMC)模拟探究H_... 详细信息

低温吸附法处理激光尾气中的H_(2)相较于传统尾气处理方法具有体积小、质量轻、运行成本低、无振动噪声等特点,其关键问题是开发低温低压条件下高性能的H_(2)吸附剂.以石墨片微元构建多孔活性炭模型,使用巨正则蒙特卡罗(gCMC)模拟探究H_(2)在多孔活性炭中的吸附行为,通过考察多种因素的影响,期望获得更高的H_(2)吸附量.计算使用pcff力场,范德华相互作用采用Lennard-Jones 12-6形式,将计算得到的H_(2)吸附等温线以及模型的BET参数与实验值对比,验证了模型和力场的准确性.之后探究了石墨片微元尺度、多孔活性炭密度和吸附温度对H_(2)吸附的影响.结果显示:石墨片微元尺度对H_(2)的吸附有较大影响,由1环构建的模型性能最差,由19环构建的模型性能最好,从吸附性能来看,在单一石墨微元模型和混合石墨微元模型中均满足19环>37环>7环>1环;在所建立的0.5~1.3 g/cm^(3)模型密度范围内,存在最优密度1.1 g/cm3,此时能够获得最大H_(2)吸附量,比表面积和孔径分布二者共同作用影响吸附性能;温度对H_(2)低温吸附有较大影响,当吸附温度升高5 K和10 K时,吸附量分别下降了19.1%和36.8%,因此加强吸附过程中的散热和优化吸附床结构可以提高氢气的吸附量.

关键词：活性炭吸附蒙特卡罗模拟氢低温低压