检索结果-南通市图书馆

Science China Chemistry 2025年第1期68卷 186-191页

作者： Hai Zou Yunfeng Bao Xueshang Xin Yu Qi Tengfeng xie Fuxiang zhang State Key Laboratory of Catalysis Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China School of Chemistry and Chemical Engineering Liaoning Normal UniversityDalian 116029China College of Chemistry Jilin UniversityChangchun 130012China

Constructing typeⅡheterostructures represents a widely recognized strategy for enhancing charge separation and photocatalytic efficiency,but it remains challenging to fabricate homologous heterostructures based on visible-light-responsive semiconductors,especially for popularly investigated(oxy)nitrides with low thermal ***,we synthesized a homologous heterostructure(denoted as YTON_H)based on the oxynitrides of YTaO_(4-x)N_(y)and YTa ON_(2).This heterostructure exhibits type Ⅱ band structure alignment and intimate interface achieved through a magnesium(Mg)powder-assisted nitridation *** with widely reported heterologous heterostructures,the as-obtained YTON_H homologous heterostructure could similarly exhibit enhanced charge separation as well as photocatalytic water splitting performance with respect to its counterparts(YTaO_(4-x)N_(y)and YTaON_(2)).Meanwhile,detailed structural characterizations and spectroscopy analysis have been made to confirm the formation of heterostructure and promotion of spatial charge separation.

关键词： charge separation heterostructure oxynitride photocatalysis visible light

Integrating Cu+/Cu0 sites on porous nitrogen-doped carbon nanofibers for stable and efficient CO2 electroreduction to multicarbon products

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第2期101卷 453-462页

作者： Yicheng Chao Jiahao zhang Qinyue Wu Xinfei Fan xie Quan Yanming Liu Key Laboratory of Industrial Ecology and Environmental Engineering (MOE) School of Environmental Science and Technology Dalian University of Technology College of Environmental Science and Engineering Dalian Maritime University Frontier Science Center for Smart Materials Dalian University of Technology

The Cu+/Cu0sites of copper-based catalysts are crucial for enhancing the production of multicarbon(C2+)products from electrochemical CO2reduction reaction（eCO2RR）.However,the unstable Cu+and insufficient Cu+/Cu0active sites lead to their limited selectivity and stability for C2+***,we embedded copper oxide（CuOx） particles into porous nitrogen-doped carbon nanofibers（CuOx@PCNF）by pyrolysis of the electrospun fiber film containing ZIF-8 and Cu2O *** porous nitrogendoped carbon nanofibers protected and dispersed Cu+species,and its micro porous structure enhanced the interaction between CuOxand reactants during *** obtained CuOx@PCNF created more effective and stable Cu+/Cu0active *** showed a high Faradaic efficiency of 62.5% for C2+products in Hcell,which was 2 times higher than that of bare CuOx（～31.1%）.Furthermore,it achieved a maximum Faradaic efficiency of 80.7% for C2+products in flow *** situ characterization and density functional theory（DFT） calculation confirmed that the N-doped carbon layer protected Cu+from electrochemical reduction and lowered the energy barrier for the dimerization of**** and exposed Cu+/Cu0active sites enhanced the enrichment of*CO and promoted the C-C coupling reaction on the catalyst surface,which facilitated the formation of C2+products.

关键词： Carbon nanofibers Cu+/Cu0 sites C–C coupling Electrocatalytic CO2 reduction Multicarbon products

Traditional Chinese medicine in the treatment of Helicobacter pylorirelated gastritis:The mechanisms of signalling pathway regulations

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2025年第3期31卷 11-28页

作者： Pei-Pei zhang liang Li Hao-Yu Qu Guang-Yu Chen Meng-Zhou xie Yan-Kun Chen School of Traditional Chinese Medicine Hunan University of Chinese MedicineChangsha 410200Hunan ProvinceChina Hunan Engineering Technology Research Center for Medicinal and Functional Food Hunan University of Chinese MedicineChangsha 410200Hunan ProvinceChina Key Laboratory of Traditional Chinese Medicine Heart and Lung Syndrome Differentiation and Medicated Diet and Dietotherapy Hunan University of Chinese MedicineChangsha 410200Hunan ProvinceChina School of Informatics Hunan University of Chinese MedicineChangsha 410208Hunan ProvinceChina Precision Medicine Research and Development Center Zhuhai Institute of Advanced TechnologyChinese Academy of SciencesZhuhai 519000Guangdong ProvinceChina

Helicobacter pylori-associated gastritis(HPAG)is a common condition of the gastrointestinal ***,extensive and long-term antibiotic use has resulted in numerous adverse effects,including increased resistance,gastrointestinal dysfunction,and increased recurrence *** these concerns develop,traditional Chinese medicine(TCM)may have *** is based on the concept of completeness and aims to eliminate pathogens and strengthen the *** has the potential to prevent this condition while also boosting the rate of Helicobacter pylori *** review elaborates on the mechanism of TCM treatment for HPAG based on cellular signalling pathways,which reflects the flexibility of TCM in treating diseases and the advantages of multi-level,multipathway,and multi-target treatments for HPAG.

关键词： Helicobacter pylori Helicobacter pylori-associated gastritis Traditional Chinese medicine Signalling pathway Eliminate pathogens Strengthen the body

High-throughput screening of CO_(2) cycloaddition MOF catalyst with an explainable machine learning model

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Green Energy & Environment 2025年第1期10卷 132-138页

作者： Xuefeng Bai Yi Li Yabo xie Qiancheng Chen Xin zhang Jian-Rong Li Beijing Key Laboratory for Green Catalysis and Separation and Department of Chemical Engineering College of Materials Science&EngineeringBeijing University of TechnologyBeijing100124China

The high porosity and tunable chemical functionality of metal-organic frameworks(MOFs)make it a promising catalyst design ***-throughput screening of catalytic performance is feasible since the large MOF structure database is *** this study,we report a machine learning model for high-throughput screening of MOF catalysts for the CO_(2) cycloaddition *** descriptors for model training were judiciously chosen according to the reaction mechanism,which leads to high accuracy up to 97%for the 75%quantile of the training set as the classification *** feature contribution was further evaluated with SHAP and PDP analysis to provide a certain physical understanding.12,415 hypothetical MOF structures and 100 reported MOFs were evaluated under 100℃ and 1 bar within one day using the model,and 239 potentially efficient catalysts were *** them,MOF-76(Y)achieved the top performance experimentally among reported MOFs,in good agreement with the prediction.

关键词： Metal-organic frameworks High-throughput screening Machine learning Explainable model CO_(2)cycloaddition

The effect of typical seawater cations on the adhesion of mussel protein Mefp-1 based on dissipative quartz crystal microbalance

在线全文

学校读者我要写书评

暂无评论

Journal of Oceanology and Limnology 2025年第1期43卷 274-285页

作者： Futao zhang Chengjun SUN Linqing xie Fuqian LI Fenghua JIANG Jingxi LI Marine Bioresource and Environment Research Center First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China Laboratory of Marine Drugs and Bioproducts Laoshan LaboratoryQingdao 266237China Shandong Jinpiao Food Machinery Co. Ltd.Weihai 264300China

Mussels are common anchoring organisms that adhere to the surfaces of various substrates with their *** adhesion of mussel to substrates is contingent upon the presence of mussel foot proteins,of which Mytilus edulis foot protein-1(Mefp-1)has been identified as the most abundant *** has been found that lipids are involved in the mussel adhesion process and can facilitate *** this research,the adhesion behavior of Mefp-1 on various substrate surfaces under the effect of typical seawater cations with or without the presence of lipid were investigated using a quartz crystal microbalance with dissipation(QCM-D).Results indicate that the presence of cations Ca^(2+),Mg^(2+),Na^(+),and K^(+)leads to varying degrees of reduction in the adhesion performance of Mefp-1 on different *** degree of this reduction,however,was much alleviated in the presence of palmitic acid,which is involved in the mussel adhesion ***,the involvement of palmitic acid is advantageous for mussel protein adhesion to the substrate surface in the marine *** study illustrated the significant contribution of palmitic acid to mussel adhesion,which can help to better understand biofouling mechanisms and develop biomimetic adhesive materials.

关键词： mussel adhesion quartz crystal microbalance with dissipation(QCM-D) typical seawater cations palmitic acid Mefp-1

Formation mechanism of deep natural hydrogen in the Sichuan Basin

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2025年第2期68卷 581-597页

作者： Xiaomei WANG Kun HE Chunlong YANG Hao xie Xiaobo WANG Yitong LYU Linfeng xie Shuichang zhang Research Institute of Petroleum Exploration&Development PetroChinaBeijing 100083China Key Laboratory of Petroleum Geochemistry China National Petroleum CorporationBeijing 100083China International Center for Isotope Effects Research School of Earth Science and EngineeringNanjing UniversityNanjing 210023China

As a potential renewable and clean energy source,the distribution and exploration prospects of natural hydrogen have garnered widespread ***,the limitations in understanding the formation mechanisms and accumulation patterns of underground natural hydrogen have significantly constrained its efficient exploration and *** study reports H_(2)content and isotopes in natural gas from deep formations in sedimentary basins through geochemical analysis of 58 conventional gas samples from the Sinian to Triassic strata in the central Sichuan *** discovered that H_(2)content in deep natural gas in central Sichuan generally exceeds 0.1%,with a maximum of 1.6%,and hydrogen isotopes(δ^(2)H_(H_(2)))range from-850‰to-586‰.Analysis of the geological conditions,hydrogen generation mechanisms,and isotope fractionation characteristics in the study area confirms that microbial fermentation or in-situ organic matter cracking are not effective pathways for deep H_(2)*** with helium content and isotope analysis of the natural gas,it is inferred that the volcanic basement in the central Sichuan area is the potential source rock for natural H_(2)in the Sinian to Triassic ***,H_(2)originates from the radiolysis of water and hydrothermal reactions of Fe(Ⅱ)in the basement ***,a diffusion fractionation model reveals significant isotope fractionation during the migration and accumulation of deep H_(2)into sedimentary reservoirs,which lead to anomalously light δ^(2)H_(H_(2))in deep natural gas in central *** indicates that the underground natural hydrogen accumulation is in a long-term dynamic process,with simultaneous H_(2)accumulation and dissipation in the gas *** research not only elucidates the formation mechanism of deep H_(2)but also provides insights for the resource potential of natural hydrogen in sedimentary basins.

关键词： Natural H2 Sichuan Basin Hydrogen generation mechanism Isotope fractionation

同方期刊数据库

Trinuclear gold-catalyzed site-selective alkylation of peptides

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第1期68卷 249-256页

作者： Qing-Yun Fang Chengyihan Gu Yinghan Chen Wencheng Yan Yong liang Weipeng Li Chengjian Zhu Jie Han Jin xie State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic MaterialsChemistry and Biomedicine Innovation Center(ChemBIC)School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Green Catalysis Center College of ChemistryZhengzhou UniversityZhengzhou 450001China State Key Laboratory of Natural Medicines China Pharmaceutical UniversityNanjing 211198China

Selective modification of peptides has always been a challenging *** selective alkylation of peptides can alter the biological activity and physical properties of molecules,and it has gained significant research *** herein disclose an intriguing gold-catalyzed alkylation of peptides using bench-stable unactivated alkyl bromides under photoredox catalysis.A wide range of structurally diverse primary,secondary and tertiary alkyl bromides serve as effective coupling partners to precisely connect with theα-C(sp^(3))–H in glycine residue of *** protocol demonstrates an exceptionally broad scope for alkyl halides and excellent tolerance for a wide range of useful functional groups.A series of relay transformations to construct cyclic peptides,to proceed click reaction and to realize peptide fluorescence labeling further enhance its synthetic *** addition,mechanistic studies and density functional theory(DFT)calculations reveal an inner-sphere and subsequent outersphere single electron transfer(SET)mechanism.

关键词： gold catalysis peptide alkylation C-C coupling radical

同方期刊数据库

Efficient remediation of different concentrations of Cr-contaminated soils by nano zero-valent iron modified with carboxymethyl cellulose and biochar

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2025年第1期147卷 474-486页

作者： Lihong xie Qiyan Ma Qingjun Chen Yiyang Liu Pengfei Guo Jinlan zhang Guilan Duan Aijun Lin Tingting zhang Shangyi Li Department of Environmental Science and Engineering College of Chemical EngineeringBeijing University of Chemical TechnologyBeijing 100029China China National Petroleum and Chemical Planning Institute Beijing 100013China State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China

Nano zero-valent iron(nZVI)is widely used in soil remediation due to its high ***,the easy agglomeration,poor antioxidant ability and passivation layer of Fe-Cr coprecipitates of nZVI have limited its application scale in Cr-contaminated soil remediation,especially in high concentration of Cr-contaminated ***,we found that the carboxymethyl cellulose on nZVI particles could increase the zeta potential value of soil and change the phase of *** with the presence of biochar,97.0%and 96.6%Cr immobilization efficiency through CMC-nZVI/BC were respectively achieved in high and low concentrations of Cr-contaminated soils after 90-days *** addition,the immobilization efficiency of Cr(VI)only decreased by 5.1%through CMC-nZVI/BC treatment after 10 weeks aging in air,attributing to the strong antioxidation *** for the surrounding Crcontaminated groundwater,the Cr(VI)removal capacity of CMC-nZVI/BC was evaluated under different reaction conditions through column experiments and COMSOL ***-nZVI/BC could efficiently remove 85%of Cr(VI)in about 400 hr when the initial Cr(VI)concentration was 40 mg/L and the flow rate was 0.5 mL/*** study demonstrates that uniformly dispersed CMC-nZVI/BC has an excellent remediation effect on different concentrations of Cr-contaminated soils.

关键词： Carboxymethyl cellulose Nanoscale zero-valent iron Biochar Cr-contaminated soils

Pulsed dynamic electrolysis enhanced PEMWE hydrogen production:Revealing the effects of pulsed electric fields on protons mass transport and hydrogen bubble escape

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 201-214页

作者： Xuewei zhang Wei Zhou Yuming Huang liang xie Tonghui Li Huimin Kang Lijie Wang Yang Yu Yani Ding Junfeng Li Jiaxiang Chen Miaoting Sun Shuo Cheng Xiaoxiao Meng Jihui Gao Guangbo Zhao School of Energy Science and Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangChina China Datang Technology Innovation Co. LtdXiong’an 071799HebeiChina

The transition of hydrogen sourcing from carbon-intensive to water-based methodologies is underway,with renewable energy-powered proton exchange membrane water electrolysis(PEMWE)emerging as the preeminent pathway for hydrogen *** remarkable advancements in this field,confronting the sluggish electrochemical kinetics and inherent high-energy consumption arising from deteriorated mass transport within PEMWE systems remains a formidable *** impediment stems primarily from the hindered protons mass transfer and the untimely hydrogen bubbles *** address these challenges,we harness the inherent variability of electrical energy and introduce an innovative pulsed dynamic water electrolysis *** to constant voltage electrolysis(hydrogen production rate:51.6 m L h^(-1),energy consumption:5.37 kWh Nm-^(3)H_(2)),this strategy(hydrogen production rate:66 m L h^(-1),energy consumption:3.83 kWh Nm-^(3)H_(2))increases the hydrogen production rate by approximately 27%and reduces the energy consumption by about 28%.Furthermore,we demonstrate the practicality of this system by integrating it with an off-grid photovoltaic(PV)system designed for outdoor operation,successfully driving a hydrogen production current of up to 500 mA under an average voltage of approximately 2 *** combined results of in-situ characterization and finite element analysis reveal the performance enhancement mechanism:pulsed dynamic electrolysis(PDE)dramatically accelerates the enrichment of protons at the electrode/solution interface and facilitates the release of bubbles on the electrode *** such,PDE-enhanced PEMWE represents a synergistic advancement,concurrently enhancing both the hydrogen generation reaction and associated transport *** promising technology not only redefines the landscape of electrolysis-based hydrogen production but also holds immense potential for broadening its application across a diverse spectrum of electrocatalytic end

关键词： Water electrolysis Hydrogen production Pulsed dynamic electrolysis Proton exchange membrane water electrolysis Mass transport

Hydrogen bond-induced conduction loss for enhanced electromagnetic attenuation in deep eutectic gel absorbers

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2025年第3期32卷 738-746页

作者： Yuntong Wang Shengchong Hui Zhaoxiaohan Shi Zijing Li Geng Chen Tao zhang Xinyue xie Limin zhang Hongjing Wu MOE Key Laboratory of Material Physics and Chemistry under Extraordinary School of Physical Science and TechnologyNorthwestern Polytechnical UniversityXi’an 710072China Queen Mary University of London Engineering School Northwestern Polytechnical UniversityXi’an 710072China Research&Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518063China

Gels and conductive polymer composites,including hydrogen bonds(HBs),have emerged as promising materials for electro-magnetic wave(EMW)absorption across various ***,the relationship between conduction loss in EMW-absorbing materials and charge transfer in HB remains to be fully *** this study,we developed a series of deep eutectic gels to fine-tune the quantity of HB by adjusting the molar ratio of choline chloride(ChCl)and ethylene glycol(EG).Owing to the unique properties of deep eutectic gels,the effects of magnetic loss and polarization loss on EMW attenuation can be *** results indicate that the quantity of HB initially increases and then decreases with the introduction of EG,with HB-induced conductive loss following similar *** a ChCl and EG molar ratio of 2.4,the gel labeled G22-CE2.4 exhibited the best EMW absorption performance,characterized by an effective absorption bandwidth of 8.50 GHz and a thickness of 2.54 *** superior performance is attributed to the synergistic ef-fects of excellent conductive loss and impedance matching generated by the optimal number of *** work elucidates the role of HB in dielectric loss for the first time and provides valuable insights into the optimal design of supramolecular polymer absorbers.

关键词： absorbers hydrogen bonds deep eutectic gels dielectric properties conduction loss