检索结果-南通市图书馆

An ultra-porous g-c_(3)n_(4) micro-tube coupled with MXene(Ti_(3)c_(2)TX)nanosheets for efficient degradation of organics under natural sunlight

引用

Journal of Environmental Sciences 2024年第3期137卷 258-270页

作者： Zongyang Ya Qiyou wang Jingjin cai Peng wang Xinyu Jiang Zhiyin cai Shanglin Xiang Tingwei wang Dongyu cai college of Materials Science&Engineering Nanjing Tech University30 South PuZhu RoadNanjing 211816China Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing Tech University30 South PuZhu RoadNanjing 211816China

It remains as a challenge for realizing efficient photo-responsive catalysts towards largescale degradation of organic pollutants under natural *** work reports a new pore engineering strategy for creating ultra-porous g-c_(3)n_(4) micro-tubes with an unprecedentedly high specific surface area of 152.96 m^(2)/*** is mainly associated with releasing internal vapor pressure in the autoclave where the hydrothermal treatment of the urea/melamine mixture is *** by microscopic observation,porosity measurement and spectroscopic characterization,it is found that releasing the pressure at halfway of hydrothermal process is vital for forming exfoliated rod-like precursors and the de-aggregation of these rods presents substantial benefits on the production of mesopores on g-c_(3)n_(4) microtubes during the calc.nation of *** offers a large number of reactive sites required by photocatalytic *** these micro-tubes with Ti_(3)c_(2)T_(X) nanosheets via electrostatic interaction yields a 1D/2D heterojunction with a close interfacial *** addition of metallically c.nductive Ti_(3)c_(2)T_(X) nanosheets accelerates the separation between electrons and holes,and also enhances the light *** these merits of structural design lead to forming a group of highly efficient catalysts demonstrating an excellent photocatalytic degradation rate of k=0.0560 min^(-1)for RhB dyes under 100 mW/cm~2 visible light radiation that micks sunlight *** laboratory valuation is further supported by an outdoor test that shows a fast degradation rate of 0.0744 min^(-1)under natural sunlight.

关键词： carbon nitride MXene Heterojunction Photocatalysis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Soil and microbial c.n:P stoichiometries play vital roles in regulating P transformation in agricultural ecosystems:A review

引用

Pedosphere 2024年第1期34卷 44-51页

作者： Guanglei cHEn Jiahui YUAn Shenqiang wang Yuting LIAnG Dengjun wang Yiyong ZHU Yu wang State Key Laboratory of Soil and Sustainable Agriculture Changshu National Agro-Ecosystem Observation and Research StationInstitute of Soil ScienceChinese Academy of SciencesNanjing 210008China School of Life Sciences Jiangsu Normal UniversityXuzhou 221000China School of Fisheries Aquacultureand Aquatic SciencesAuburn UniversityAuburn AL 36849USA Jiangsu collaborative Innovation c.nter for Solid Organic Waste Resource Utilization College of Resources and Environmental ScienceNanjing Agricultural UniversityNanjing 210095China

Stoichiometry plays a crucial role in biogeochemical cycles and c.n modulate soil nutrient availability and functions. In agricultural ecosystems,phosphorus(P) fertilizers(organic or chemical) are often applied to achieve high crop yields. However, P is readily fixed by soil particles, leading to low P use efficiency. Therefore, understanding the role of carbon:nitrogen:P stoichiometries of soil and microorganisms in soil P transformation is of great signific.nce for P management in agriculture. This paper provides a comprehensive review of the rec.nt research on stoichiometry effect on soil P transformation in agricultural ecosystems. Soil microorganisms play an important role in the transformation of soil non-labile inorganic P to microbial biomass P by regulating microbial biomass stoichiometry. They also mobilize soil unavailable organic P into available P by changing ecoenzyme stoichiometry. Organic materials, such as manure and straw, play an important role in promoting the transformation of insoluble P into available P as well. Additionally, periphytic biofilms c.n reduce P loss from rice field ecosystems. Agricultural stoichiometries are different from those of natural ecosystems and thereby should receive more attention due to the influences of anthropogenic factors. Therefore, it is necessary to c.nduct further stoichiometry research on the soil biochemical mechanisms underlying P transformation in agricultural ecosystems. In c.nclusion, understanding stoichiometry impact on soil P transformation is crucial for P management in agricultural ecosystems.

关键词： ecoenzyme microbial biomass microbial community microorganism P availability periphytic biofilm soil P transformation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Enhanced degradation of tetracycline by gas-liquid discharge plasma coupled with g-c_(3)n_(4)/TiO_(2)

引用

Plasma Science and Tec.nology 2024年第9期26卷 69-78页

作者： Zhenhai wang Zikai ZHOU Sen wang Zhi FAnG college of Electrical Engineering and c.ntrol Science Nanjing Tech UniversityNanjing 211816People’s Republic of China

Plasma-catalysis is c.nsidered as one of the most promising tec.nologies for antibiotic degradation in *** the plasma-catalytic system,one of the factors affecting the degradation effect is the performance of the photocatalyst,which is usually restricted by the rapid recombination of electrons and holes as well as narrow light absorption *** this research,a photocatalyst g-c_(3)n_(4)/TiO_(2) was prepared and coupled with gas-liquid discharge(GLD)to degrade tetracycline(Tc).The performance was examined,and the degradation pathways and mechanisms were *** show that a 90%degradation rate is achieved in the GLD with g-c_(3)n_(4)/TiO_(2) over a 10 min *** the pulse voltage is c.nducive to increasing the degradation rate,whereas the addition of excessive g-c_(3)n_(4)/TiO_(2) tends to precipitate agglomerates,resulting in a poor degradation *** redox properties of the g-c_(3)n_(4)/TiO_(2) surface promote the generation of oxidizing active species(H2O2,O3)in *** quenching experiments showed that·OH,hole(h^(+)),play important roles in the Tc degradation by the discharge with g-c_(3)n_(4)/TiO_(2).Two potential degradation pathways were proposed based on the *** toxicity of tetracycline was reduced by treatment in the ***,the g-c_(3)n_(4)/TiO_(2) composites exhibited excellent recoverability and stability.

关键词： gas-liquid discharge plasma-catalysis g-c_(3)n_(4)/TiO_(2) Tc degradation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

computational design of bimetallic Tm_(2)@g-c_(9)n_(4)electrocatalysts for enhanced cO reduction toward c_(2)products

引用

chinese chemical Letters 2024年第7期35卷 484-490页

作者： Jiajun wang Guolin Yi Shengling Guo Jianing wang Shujuan Li Ke Xu Weiyi wang Shulai Lei Tianjin Key Laboratory of Structure and Performance for Functional Molecules College of ChemistryTianjin Normal UniversityTianjin 300387China Department of chemical Physics&Hefei national Laboratory for Physical Sciences at Microscale University of Science and Technology of ChinaHefei 230026China Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices Hubei University of Arts and ScienceXiangyang 441053China Hubei Longzhong Laboratory Xiangyang 441053China

Electrochemical cO reduction(EcOR)as a potential strategy for produc.ng valuable chemicals and fuels has captured substantial ***,the currently available electrocatalysts suffer from poor selectivity and low Faradaic efficiency,limiting their industrial ***,we systematically investigate the potential of homonuclear bimetallic electrocatalysts,Tm_(2)@c_(9)n_(4)(TM=Fe,co,ni,and cu),for the EcOR through extensive density functional theory *** findings suggest that all four proposed monolayers exhibit exceptional stability,making them highly suitable for experimental synthesis and practical ***,these transition-metal dual atoms anchored on c_(9)n_(4)monolayers show great potential in facilitating the production of high-value c_(2)products,such as c_(2)H_(5)OH and c_(2)H_(4),due to the signific.ntly low limiting potentials(-0.06~-0.46 V)and small kinetic energy barriers(0.54–1.08 eV)for the cO coupling ***,with the exception of ni_(2)@c_(9)n_(4),these bimetallic catalysts demonstrate the impressive suppression of the competitive hydrogen evolution reaction(HER),leading to a high selectivity for c_(2)products in *** predictions would accelerate the development of high-performance c_(9)n_(4)-based dual-atom catalysts for the EcOR.

关键词： c_(9)n_(4)monolayer Double-atom catalysts cO electroreduction Multi-carbon products Density functional theory

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

c.nstructing long-cycling crystalline c_(3)n_(4)-based carbonaceous anodes for sodium-ion battery via n c.nfiguration c.ntrol

引用

carbon Energy 2024年第1期6卷 159-171页

作者： Ying wang Hongguan Li Shuanlong Di Boyin Zhai Ping niu Antonios Kelarakis Shulan wang Li Li School of Metallurgy Northeastern UniversityShenyangLiaoningChina State Key Laboratory of Rolling and Automation Northeastern UniversityShenyangLiaoningChina Department of chemistry College of ScienceNortheastern UniversityShenyangLiaoningChina School of natural Sciences UCLan Research Centre for Smart MaterialsUniversity of Central LancashirePrestonUK Foshan Graduate School of Innovation Northeastern UniversityFoshanGuangdongChina

carbon nitrides with two-dimensional layered structures and high theoretical capacities are attractive as anode materials for sodium-ion batteries while their low crystallinity and insufficient structural stability strongly restrict their practical *** carbon nitrides with c.nductive carbon may relieve these ***,little is known about the influence of nitrogen(n)c.nfigurations on the interactions between carbon and c_(3)n_(4),which is fundamentally critical for guiding the precise design of advanced c_(3)n_(4)-related ***,highly crystalline c_(3)n_(4)(poly(triazine imide),PTI)based all-carbon composites were developed by molten salt *** importantly,the vital role of pyrrolic.n for enhanc.ng charge transfer and boosting na+storage of c_(3)n_(4)-based composites,which was c.nfirmed by both theoretical and experimental evidence,was spot-highlighted for the first *** elaborately c.ntrolling the salt composition,the composite with high pyrrolic.n and minimized graphitic.n c.ntent was *** from the formation of highly crystalline PTI and electrochemically favorable pyrrolic.n c.nfigurations,the composite delivered an unusual reverse growth and record-level cycling stability even after 5000 cycles along with high reversible capacity and outstanding full-cell capacity *** work broadens the energy storage applications of c_(3)n_(4) and provides new prospects for the design of advanced all-carbon electrodes.

关键词： anode highly crystalline c_(3)n_(4) n c.nfiguration sodium-ion batteries ultra-long cyclic stability

来源：

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

Land use effects on the dynamics of soil c.n and microbes in the water-wind erosion crisscross region of the northern Loess Plateau,china

引用

Pedosphere 2024年第1期34卷 181-190页

作者： Yi wang chunyue LI Shunjin HU State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi'an 710061China State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water ConservationNorthwest A&F UniversityYangling 712100China School of Geography and Tourism Shaanxi Normal UniversityXi'an 710119China Department of Entomology&Plant Pathology North Carolina State UniversityRaleigh 27695USA

The water-wind erosion crisscross region of the northern Loess Plateau in china is under c.nstant pressure from severe erosion due to its windy and dry climate and intensive human activities. Identifying sustainable land use patterns is key to maintaining ecosystem sustainability in the area. Our aim was to appraise the impacts of different land use regimes on the dynamics of soil total organic c(TOc), total n(Tn), and microbes in a typical watershed in the northern Loess Plateau to identify suitable land use types that c.n maintain soil fertility and sustainability. A field experiment was performed in Liudaogou watershed in Shenmu city, Shaanxi Province, china, where the dynamics of soil TOc and Tn, microbial biomass c and n, microbial respiration, and net n mineralization in six typical land use types, dam land, rainfed slope land, deciduous broadleaf forest, evergreen c.niferous forest, shrubland, and grassland,were measured in three different growing seasons. Land use type and season signific.ntly affected TOc, Tn, and the dynamics of microbial biomass and activity. As the most anthropogenically disturbed land use pattern, dam land was an optimal land use pattern for TOc sequestration due to its higher TOc and Tn, but lower microbial activity. Soil TOc, Tn, and microbial properties demonstrated a decreasing trend after natural grassland was c.nverted to shrubland,forest, and rainfed slope land. Shrubland with exotic.n-fixing Korshinsk peashrub(caragana korshinskii Kom.) c.n maintain TOc, Tn, and microbial properties similar to those in grassland. Soil TOc, nH_(4+)^(-)n, Tn, moisture, and extractable c were the principal indexes for soil microbial biomass and activity and explained 88.90% of the total variance. Thus, grassland was the optimal land use pattern in the water-wind erosion crisscross region of the northern Loess Plateau to maintain ecosystem stability and sustainability.

关键词： grassland microbial activity microbial biomass total organic c total n watershed

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Performance of iron-air battery with iron nanoparticle-encapsulated c.n composite electrode

引用

Frontiers in Energy 2024年第1期18卷 42-53页

作者： c.n FAnG Xiangmei TAnG Jiaoyan wang Qingfeng YI School of chemistry and chemical Engineering Hunan University of Science and TechnologyXiangtan 411201China Hunan Provincial Key Laboratory of Advanced Materials for new Energy Storage and c.nversion Xiangtan 411201China

Highly efficient and stable iron electrodes are of great signific.nt to the development of iron-air battery(IAB).In this paper,iron nanoparticle-encapsulated c.n composite(nanoFe@cn)was synthesized by pyrolysis using polyaniline as the c.n *** performance of the nanoFe@cn in different electrolytes(alkaline,neutral,and quasi-neutral)was investigated via cyclic voltammetry(cV).The IAB was assembled with nanoFe@cn as the anode and IrO_(2)+Pt/c as the *** effects of different discharging/charging current densities and electrolytes on the battery performance were also *** K_(2)SO_(4)electrolyte c.n effectively suppress the passivation of iron electrode,and the battery showed a good cycling stability during 180 charging/discharging *** to the pure nano-iron(nanoFe)battery,the nanoFe@cn battery has a more stable cycling stability either in KOH or nH_(4)cl+Kcl electrolyte.

关键词： energy storage and c.nversion metallic composites nanocomposites iron-air battery iron anode

来源：

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

Graphdiyne(c_(n)H_(2n-2))as an"electron transfer bridge"boosting photocatalytic hydrogen evolution over Zn_(0.5)co_(0.5)S/MoS_(2)S-scheme heterojunction

引用

Rare Metals 2024年第5期43卷 1999-2014页

作者： Mei Li Jing-Zhi wang Zhi-Liang Jin School of chemistry and chemical Engineering North Minzu UniversityYinchuan 750021China School of chemistry and chemical Engineering Ningxia Key Laboratory of Solar Chemical Conversion TechnologyKey Laboratory for Chemical Engineering and TechnologyState Ethnic Affairs CommissionNorth Minzu UniversityYinchuan 750021China

In the process of photocatalytic water cracking,the migration rate and utilization rate of photogenerated charges determine the hydrogen evolution performance of the *** this paper,a carbon isotope superc.nducting material graphdiyne(GDY)is prepared by mechanical ball milling and introduced into the S-scheme heterojunction Zn_(0.5)co_(0.5)S/MoS_(2)inorganic *** terms of hydrogen evolution kinetics,GDY acts as an electron bridge,not only accelerating the migration of photogenerated carriers but also improving the utilization of photogenerated ***,the large twodimensional layer provides more loading and anchoring points for Zn_(0.5)co_(0.5)S/MoS_(2),which increases the number of active *** ternary composite catalyst 20%GDY/Zn_(0.5)co_(0.5)S/MoS_(2)(20-GcSM)generates 69.94μmol of hydrogen(5 h)in triethanolamine *** is 2.97 and1.80 times higher than Zn_(0.5)co_(0.5)S and Zn_(0.5)co_(0.5)S/MoS_(2),*** the cyclic experiment,it still has stable hydrogen evolution performance after standing for24 h(under dark c.nditions).In addition,the potential mechanism of photocatalytic hydrogen evolution is demonstrated through in-situ X-ray photoelectron *** work provides a reference for further research in the field of introduc.ng carbon materials into photocatalytic systems and improving the utilization of photogenerated charges.

关键词： Graphdiyne S-scheme heterojunction Electron transfer bridge Hydrogen production

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Plasma-exfoliated g-c_(3)n_(4) with oxygen doping: tailoring photocatalytic properties

引用

Frontiers of chemical Science and Engineering 2024年第2期18卷 27-39页

作者： Yuxin Li Junxin Guo Rui Han Zhao wang national Engineering Research c.ntre of Industry crystallization Tec.nology School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China

Heteroatom doping and defect engineering have been proposed as effective ways to modulate the energy band structure and improve the photocatalytic activity of g-c_(3)n_(4). In this work, ultrathin defective g-c_(3)n_(4) was successfully prepared using cold plasma. Plasma exfoliation reduces the thic.ness of g-c_(3)n_(4) from 10 nm to 3 nm, while simultaneously introduc.ng a large number of nitrogen defects and oxygen atoms into g-c_(3)n_(4). The amount of doped O was regulated by varying the time and power of the plasma treatment. Due to n vac.ncies, O atoms formed strong bonds with c atoms, resulting in O doping in g-c_(3)n_(4). The mechanism of plasma treatment involves oxygen etching and gas expansion. Photocatalytic experiments demonstrated that appropriate amount of O doping improved the photocatalytic degradation of rhodamine B compared with pure g-c_(3)n_(4). The introduction of O optimized the energy band structure and photoelectric properties of g-c_(3)n_(4). Active species trapping experiments revealed ·O_(2)^(–) as the main active species during the degradation.

关键词： graphitic carbon nitride cold plasma oxygen doping nitrogen defect visible-light photocatalysis

来源：

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

Ti_(3)c_(2)T_(x)/SnO_(2)P–n heterostructure c.nstruction boosts room-temperature detecting formaldehyde

引用

Rare Metals 2024年第1期43卷 267-279页

作者： Yue Zhang Ming-Yue wang Xiao-Guang San Yan-Bai Shen Guo-Sheng wang Lei Zhang Dan Meng college of chemical Engineering Shenyang University of Chemical TechnologyShenyang 110142China Institute for Superc.nducting and Electronic Materials(ISEM) Australian Institute for Innovative Materials(AIIM)University ofWollongongWollongongNSW2500Australia college of Resources and civil Engineering Northeastern UniversityShenyang 110819China

Formaldehyde is a common atmospheric pollutant produced in industrial production and daily ***,the traditional semic.nductor formaldehyde gas sensor c.nnot work at room temperature,which limits its practical ***,developing high-performance gas sensors for rapidly and accurately detecting formaldehyde at room temperature is an important *** this study,Ti_(3)c_(2)Tx/SnO_(2)heterostructures were c.nstructed,which could selectively detect formaldehyde at room temperature with a response value of 29.16%(10×10^(-6)).In addition,the sensor shows a remarkable theoretical detection limit of 5.09×10^(-9)and good longterm *** functional theory(DFT)simulations reveal that SnO_(2)nano spheres provide the majority of adsorption sites that strongly interact with ***,Ti_(3)c_(2)T_(x)acting as a c.nductive layer facilitates the transfer of charge carriers so that they show a sensing response to formaldehyde at room ***,the formation of p-n heterostructures between SnO_(2)and Ti_(3)c_(2)T_(x)boosts the Schottky barrier at the interface,which is the critical factor in enhanc.ng the sensing properties by turning the Schottky barrier upon introduc.ng formaldehyde *** perspective is expected to provide instructive guidance for utilizing MXene/metal oxide nanocomposites to improve the gas sensing performance at room temperature.

关键词： Ti_(3)c_(2)T_(x)/SnO_(2)nanocomposites p-n heterostructures Formaldehyde sensing Room temperature DFT calculations

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：