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Phosphorus substitution into Co_(3)S_(4) nanoneedle arrays for efficient hydrogen evolution catalysis

Journal of Materials Science & Technology 2021年第30期89卷 52-58页

作者： Zhangtao Guo gaoqi tian Lin Liu Binyu Zhang Qiang Wu Yang Cao Jinchun Tu Lei Ding Xiaolin Zhang State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou 570228China School of Tropical Medicine and Laboratory Medicine MOE Key Laboratory of Emergency and TraumaHainan Medical UniversityHaikou 571199China Key Laboratory Of Child Cognition&Behavior Development Of Hainan Province Qiongtai Normal UniversityHaikou 571127China

Transition-metal based hybrids with excellent stability and activity are favorable candidates for hydrogen evolution reaction(HER).The development of typical Co_(3)S_(4)has recently received considerable attention due to the multiple valences of the spinel-structured ***,the in-depth effect of the dopants on the HER performance of Co_(3)S_(4)has not been systematically ***,we report a sequential synthesis of a spinel-structured cobalt phosphosulfate nanoneedle arrays grown on carbon cloth(namely,P-Co_(3)S_(4)/CC).Results indicate that P-Co_(3)S_(4)/CC exhibits high electrocatalytic performance for HER with a low overpotential of 65 mV to drive10 mAcm……(-2),a small Tafel slope of 76.6 mV per decade,and great long-term stability for 25 h at various current densities in alkaline *** first-principle calculation result reveals that the phosphorous doping work at Co_(3)S_(4)enhances the HER performance significantly because the tetrahedral Co^(2+)active sites nearest the P atoms more easily weaken the H-O bond to form *** experiment result characterization and theoretical calculations further show that the introduction of P atom not only offers more active sites but also improves the electrical conductivity in an alkaline electrolyte ***,the identification of active species provides feasible guidance for the further design of high-performance spinel-structured catalysts.

关键词： P-Co_(3)S_(4)/CC P substitution Electronic conductivity HER

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Hierarchical NiMoP_(2)-Ni_(2)P with amorphous interface as superior bifunctional electrocatalysts for overall water splitting

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Journal of Materials Science & Technology 2021年第18期77卷 108-116页

作者： gaoqi tian Songrui Wei Zhangtao Guo Shiwei Wu Zhongli Chen Fuming Xu Yang Cao Zheng Liu Jieqiong Wang Lei Ding Jinchun Tu Hao Zeng State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou 570228China College of Physics and Optoelectronic Engineering.Shenzhen University Shenzhen 518080China Qiongtai Normal University Haikou 571127China Department of Physics SUNY-BuffaloBuffaloNY14260USA

Producing highly efficient bifunctional catalyst for the generation of hydrogen and oxygen through overall water splitting is an emerging direction in ***,a dandelion-like hierarchical NiMoP_(2)-Ni_(2)P(nanowire/nanoparticle)heterostructure was synthesized for efficient electrochemical water *** NiMoP_(2)-Ni_(2)P heterostructures grown on carbon cloth as a freestanding integrated electrode exhibited excellent oxygen evolution reaction(OER)activity and hydrogen evolution reaction(HER)activities with low overpotentials(258 mV and 53 mV to reach 10 mA cm~(-2)for the OER and HER,respectively),and small Tafel slope(45 mV dec^(-1)and 58 mV dec^(-1)for the OER and HER,respectively).Moreover,the NiMoP_(2)-Ni_(2)P heterostructure can act as both anode and cathode catalysts for overall water splitting with low overall potential of 1.48 V at 10 mA cm~(-2).Density functional theory(DFT)combined with structural probes suggests that the amorphous heterogeneous interfaces play an essential role in enhanced catalytic performance.

关键词： Bimetallic phosphide Amorphous interface Adsorption energy Hydrogen evolution reaction Oxygen evolution reaction Water splitting

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An enzyme-free glucose sensing device based on TiO2 nanorod array photoelectric catalysis

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Chinese Journal of Structural Chemistry 2023年第9期42卷 26-33页

作者： Anna Su Qiumei Lei gaoqi tian Yaolan Yang Shuqing He Li Yan Xin Hu Tao Ji Shijie Li Junqing Hu College of Health Science and Environmental Engineering Shenzhen Technology UniversityShenzhen518118China National Engineering Research Center for Marine Aquaculture Institute of Innovation&ApplicationZhejiang Ocean UniversityZhoushanZhejiang316022China Shenzhen Bay Laboratory Shenzhen518132China

A simple one-step hydrothermal method is used to prepare an enzyme-free photoelectric combined glucose sensor based on TiO_(2)NRs/FTO with low cost,sample two-electrode,and excellent *** 380 nm light(0.5 mW cm^(−2))irradiation and a positive voltage,holes are accumulated on TiO_(2)NRs surface,catalyzing glucose and forming a photocurrent without the need for an enzyme,such as Glucose oxidase(GOx).The designed sensor exhibits high sensitivity(about 0.96μA mM^(−1)cm^(−2),without GOx)and excellent linear relationship in the glucose concentration range of 5–15 mML^(−1).The prepared glucose sensor performs better with a sensitivity of 1.48μA mM^(−1)cm^(−2)when a certain amount of GOx is mixed in the detected *** addition,the sensor has excellent anti-interference resistance to non-reducing chitosan and reducing ascorbic acid with short response time(less than 5 s);thus,it can be used in quick detection with a double electrode *** sensing device has the advantages of simple fabrication,easy storage,and reusability;therefore,it can be very promising in the portable and rapid monitoring of human blood glucose levels.

关键词： Glucose TiO_(2) Enzyme-free Photocatalysis Electrochemical biosensor

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企业采购管理技术初探

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船舶物资与市场 2000年第6期9卷 35-37页

作者：田高旗山海关船厂物资处

广义的企业采购涉及企业的许多方面,如原材料及设备的采购、工程的外包、临时用工的雇佣、贷款、对外委托的计算机软件开发、外出人员的食宿等。也就是说与企业资金流出相对应的人、物、资金、服务等流入的所有业务都属于采购的范围。当... 详细信息

广义的企业采购涉及企业的许多方面,如原材料及设备的采购、工程的外包、临时用工的雇佣、贷款、对外委托的计算机软件开发、外出人员的食宿等。也就是说与企业资金流出相对应的人、物、资金、服务等流入的所有业务都属于采购的范围。当前,还有许多国有企业亏损或效益不好,原因是多方面的。

关键词：企业采购管理稳定管理资源管理采购技巧

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“Slope-adsorption&plateau-pore filling”mechanism unlocking the potential of hard carbon anodes for“fast-charging&large-sized”batteries

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Science China Materials 2025年第1期68卷 309-311页

作者： tian Liang Xiaoming Zhu Hubei Key Laboratory of Radiation Chemistry and Functional Materials School of Nuclear Technology and Chemistry&BiologyHubei University of Science and TechnologyXianning 437100China

To date,there has been no report on fast-charging and Ahlevel sodium-ion batteries(SIBs)by utilizing thick hard carbon anodes that demonstrate prolonged cycling life and high areal capacity at high ***,the relationship among the complex structure of hard carbon,storage mechanism,and fastcharging performance in alkali-metal ion batteries has been a subject of ongoing debate[1,2].

关键词： mechanism charging utilizing

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New progresses of fine-grained sediment gravity-flow deposits and their importance for unconventional shale oil and gas plays

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Petroleum Science 2025年第1期22卷 1-15页

作者： tian Yang Ying-Lin Liu State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Chengdu University of Technology) Institute of Sedimentary Geology Key Laboratory of Deep-time Geography and Environment Reconstruction and Applications of Ministry of Natural Resources Chengdu University of Technology

Fine-grained sediments are widely distributed and constitute the most abundant component in sedimentary systems, thus the research on their genesis and distribution is of great significance. In recent years, fine-grained sediment gravity-flows(FGSGF) have been recognized as an important transportation and depositional mechanism for accumulating thick successions of fine-grained sediments. Through a comprehensive review and synthesis of global research on FGSGF deposition, the characteristics,depositional mechanisms, and distribution patterns of fine-grained sediment gravity-flow deposits(FGSGFD) are discussed, and future research prospects are clarified. In addition to the traditionally recognized low-density turbidity current and muddy debris flow, wave-enhanced gravity flow, lowdensity muddy hyperpycnal flow, and hypopycnal plumes can all form widely distributed FGSGFD. At the same time, the evolution of FGSGF during transportation can result in transitional and hybrid gravityflow deposits. The combination of multiple triggering mechanisms promotes the widespread development of FGSGFD, without temporal and spatial limitations. Different types and concentrations of clay minerals, organic matters, and organo-clay complexes are the keys to controlling the flow transformation of FGSGF from low-concentration turbidity currents to high-concentration muddy debris flows. Further study is needed on the interaction mechanism of FGSGF caused by different initiations, the evolution of FGSGF with the effect of organic-inorganic synergy, and the controlling factors of the distribution patterns of FGSGFD. The study of FGSGFD can shed some new light on the formation of widely developed thin-bedded siltstones within shales. At the same time, these insights may broaden the exploration scope of shale oil and gas, which have important geological significances for unconventional shale oil and gas.

关键词： Fine-grained sediment gravity-flow Depositional mechanism Transportation and evolution Distribution pattern Shale oil and gas

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Upper Bounds on the Multicolor Ramsey Numbers r_(k)(C_(4))

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Acta Mathematicae Applicatae Sinica 2025年第1期41卷 286-294页

作者： tian-yu LI Qi-zhong LIN Center for Discrete Mathematics Fuzhou UniversityFuzhou 350108China

The multicolor Ramsey number r_(k)(C_(4))is the smallest integer N such that any k-edge coloring of KN contains a monochromatic C_(4).The current best upper bound of r_(k)(C_(4))was obtained by Chung(1974)and independently by Irving(1974),i.e.,r_(k)(C_(4))≤k^(2)+k+1 for all k≥*** is no progress on the upper bound since *** this paper,we improve the upper bound of r_(k)(C_(4))by showing that r_(k)(C_(4))≤k^(2)+k-1 for even k≥*** improvement is based on the upper bound of the Turan number ex(n,C4),in which we mainly use the double counting method and many novel ideas from Firke,Kosek,Nash,and Williford[***,Ser.B 103(2013),327-336].

关键词： Multicolor Ramsey number Turan number 4-cycle

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Revisit the Gibbs-Thomson Equation Fitting of Poly(butylene succinate)Based on Oligomer Extended-Chain Crystals

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Chinese Journal of Polymer Science 2025年第2期43卷 392-398页

作者： Na Li Yu-Pei tian tian-Yu Wu Qiong Zhou Hai-Mu Ye College of New Energy and Materials China University of PetroleumBejing 102249China

The equilibrium melting point(T_(m)^(0))is a crucial thermodynamic parameter for characterizing the crystallization and melting behavior of semi-crystalline ***,the direct measurement of T_(m)^(0) poses a significant challenge because of the difficulty in physically fabricating fully-extended chain crystals of high-molecular-weight ***,various extrapolation equations for T_(m)^(0) have been proposed that utilize the thermal properties of ordinary folded-chain *** these,the Gibbs-Thomson equation is one of the most commonly employed for *** its widespread use,there are notable variations in the T_(m)^(0) values obtained by different research groups,even when based on similar *** raises questions about the validity and accuracy of using the Gibbs-Thomson equation to linearly extrapolate T_(m)^(0).In this study,we prepared a series of oligomer extended-chain crystals(ECCs)of poly(butylene succinate)(PBS)and used their properties for Gibbs-Thomson *** results reveal a perfect linear relationship,with an extrapolated T_(m)^(0) value of 136.08℃.The basal surface free energy of the oligomer ECCs was calculated as 0.084 J/m^(2),which is approximately twice that of folded-chain *** difference is attributed to the aggregation of highly mobile free tails on the crystal *** two structural features of oligomer ECCs—large thickness and fixed surface—better fulfill the conditions for applying the Gibbs-Thomson equation,ensuring its validity and ***,we believe that the Gibbs-Thomson fit can produce reliable results when sufficient high-quality data are used.

关键词： Equilibrium melting point Extended-chain crystal Gibbs-Thomson equation Inclusion complex

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Synthesis of ternary geopolymers using prediction for effective solidification of mercury in tailings

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Journal of Environmental Sciences 2025年第1期147卷 392-403页

作者： Xuan Lu Jinfa Guo Fang Chen Mengkui tian School of Chemistry and Chemical Engineering Guizhou UniversityGuiyang 550025China

This study used steel slag,fly ash,and metakaolin as raw materials(SFM materials)to create silica-alumina-based geopolymers that can solidify Hg^(2+)when activated with sodiumbased water *** experiments began with a triangular lattice point mixing design experiment,and the results were fitted,analyzed,and *** optimum SFM material mass ratio was found to be 70%steel slag,25%fly ash,and 5%*** optimum modulus of the activator was identified by comparing the unconfined compressive strength and solidifying impact on Hg^(2+)of geosynthetics with different *** SFM geopolymer was then applied in the form of potting to cure the granulated mercury *** inclusion of 50%SFM material generated a geosynthetic that reduced mercury transport to the surface soil by roughly 90%.The mercury concentration of herbaceous plant samples was also reduced by 78%.It indicates that the SFM material can effectively attenuate the migration transformation of ***,characterization methods such as XPS and FTIR were used to investigate the mechanism of Hg^(2+)solidification by geopolymers generated by SFM *** possible solidification mechanisms were proposed as alkaline environment-induced mercury precipitation,chemical bonding s,surface adsorption of Hg^(2+)and its precipitates by the geopolymer,and physical encapsulation.

关键词： Mercury Geopolymer Solidification Tailings

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Acupuncture Combined with Periocular Injection for Treatment of Hydroxychloroquine Retinopathy with Cystoid Macular Edema:A Case Report

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Chinese Journal of Integrative Medicine 2025年第1期31卷 68-72页

作者： LI tian-tian WU Yan YANG Ying-xin XUE Yu-xin MA Chao-ting Department of Ophthalmology Beijing Hospital of Traditional Chinese MedicineCapital Medical UniversityBeijing100010China

Hydroxychloroquine(HCQ)is widely used in the treatment of autoimmune disorders such as systemic lupus erythematosus(SLE)and rheumatoid arthritis,and in recent years it has also been used in diseases such as cancer,neurodegenerative diseases,metabolic diseases,and microbial infections.(1)Due to the complex pharmacokinetic characteristics of HCQ,overdose or long-term use of the drug will lead to accumulation in the tissue of organism,and severe HCQ-related retinal toxicity may occur.A cohort study in America showes that after 10 and 15 years of HCQ use,the incidence of HCQ retinopathy will be 2.5%and 8.6%,respectively.(2)The clinical manifestations of HCQ retinopathy are various,mainly photoreceptor and retinal pigment epithelium(RPE)defects,some combined with cystoid macular edema(CME),and ireversible central vision loss.

关键词： Acupuncture diseases epithelium

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