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Micro-macro regulating heterogeneous interface engineering in 3D N-doped carbon fiber/MXene/TiO_(2) nano-aerogel for boosting electromagnetic wave absorption

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Nano Research 2025年第2期18卷 843-857页

作者： Ying Li Chunlei Dong Sijia Wang Dongyi Lei Binbin Yin Yifei Cui Yanru Wang Ran Li School of Civil Engineering Qingdao University of TechnologyQingdao 266033China Cooperative Innovation Center of Engineering Construction and Safety in Shandong blue Economic Zone Qingdao University of TechnologyQingdao 266033China Department of Architecture and Civil Engineering City University of Hong KongHong Kong 999077China

MXene,as a rising star among two-dimensional(2D)electromagnetic wave materials,faces urgent challenges in addressing its self-stacking issue and regulating its ***,a micro-macro collaborative design strategy was proposed to regulate heterogeneous interface engineering in MXene-based ***-based cotton was introduced as three dimensional(3D)framework for constructing a porous structure,TiO_(2) was in-situ generated and nitrogen atom was doped on Ti_(3)C_(2)T_(x) MXene to regulate its dielectric properties,a 3D N-doped carbon fiber/MXene/TiO_(2)(CMT)nano-aerogel was successful *** synergistic effects of diverse components and structural designs,porous frameworks and TiO_(2) lattice contraction can significantly adjust the density of the conductive network and create abundant heterogeneous interfaces,as well as the lattice defects induced by nitrogen atom doping can enhance polarization loss,ultimately leading to the excellent microwave absorption performance of 3D N-CMT *** optimized N-CMT 30%aerogel exhibited a minimum reflection loss(RLmin)of−72.56 dB and an effective absorption bandwidth(EAB)of 6.92 GHz at 2.23 ***,when the thickness was adjusted from 1 to 5 mm,the EAB of the N-CMT 30%aerogel reached 13.94 GHz,achieving coverage of 98% of the C-band and the entire X and Ku ***,the attenuation capabilities of the N-CMT aerogel were further confirmed through RCS simulations,whose RCS reduction value reaches up to 19.969 dB·m^(2).These results demonstrate that 3D N-CMT nano-aerogel relying on interface engineering design exhibits significant potential in the field of electromagnetic protection,providing an important reference for future efficient absorbers.

关键词： interface engineering electromagnetic wave absorption MXene micro-macro design nano-aerogel

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Dynamically self-adjustable liquid-liquid and self-adaptive softcontact solid-solid triboelectric nanogenerator for wave energy harvesting

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Nano Research 2025年第1期18卷 404-414页

作者： Yong Long Bingqi Zhao Jianan Niu Yuxiu Liu Wei Sha Jiangwen Wang Zhong Lin Wang Weiguo Hu Guangzhou Institute of blue Energy Knowledge CityHuangpu DistrictGuangzhou 510555China Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 101400China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China

Water wave energy exhibits great potential toalleviate the global energy crisis. However, harvesting andutilizing wave energy are challenging due to its irregularity,randomness, and low frequency. Triboelectric nanogenerators(TENGs) have gained significant attention for harvesting waveenergy with high efficiency. This study presents a novelellipsoidal, pendulum-like TENG integrating both liquid-liquid(L-L) and solid-solid (S-S) triboelectricity (LS-TENG). Thisinnovative design enables continuous wave energy harvestingand self-powered marine environment monitoring under variousconditions, including temperature, humidity, and light intensity. The binary immiscible liquids within the LS-TENG’s innersoft balloon create dynamic, and self-adjustable L-L contact interfaces, significantly increasing the L-L contact area andenhancing L-L contact electrification (CE). The unique self-adaptive, soft S-S contact increases the S-S contact areacompared to traditional hard point contact, better adapting to the irregular movements of waves and promoting efficient S-SCE. The LS-TENG achieves highly efficient wave energy harvesting by coupling L-L and S-S CE. Furthermore, the uniquesoft contact design protects the S-S interfaces from mechanical wear and damage during long-term work. The LS-TENG’snovel structure provides an innovative and effective way for water wave energy harvesting.

关键词： self-adaptive soft-contact solid-solid liquid-liquid self-adjustable triboelectric nanogenerator

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Synthesis of kalsilite from microcline powder by an alkali-hydrothermal process

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International Journal of Minerals,Metallurgy and Materials 2014年第8期21卷 826-831页

作者： Shuang-qing Su Hong-wen Ma Jing Yang Pan Zhang Zheng Luo National Laboratory of Mineral Materials China University of Geosciences blue Sky Technology Corporation

The properties of aluminosilicate kalsilite have attracted the interest of researchers in chemical synthesis, ceramic industry, biofuels, etc. In this study, kalsilite was hydrothermally synthesized from microcline powder in a KOH solution. The microcline powder, rich in potassium, aluminum, and silicon, was collected from Mountain Changling in Northwestem China. The effects of temperature, time, and KOH concentration on the decomposition of microcline were investigated. The kalsilite and intermediate products were characterized by means of wet chemistry analysis, X-ray Diffraction （XRD）, infi＇ared spectrometry （IR）, 29Si magic angle spinning nuclear magnetic resonance （29Si MAS NMR）, 27A1 MAS NMR, and scanning electron microscope （SEM）. With increasing temperature, the microcline powder transforms into a metastable KAlSiO4 polymorph before transforming further into pure kalsilite. A mixture of both kalsilite and metastable KAlSiO4 polymorph is obtained when the hydrothermal reaction is carried out within 2 h; but after 2 h, kalsilite is the predominant product. The concentration of KOH, which needs to be larger than 4.3 M, is an important parameter influencing the synthesis ofkalsilite.

关键词： kalsilite microcline potassium hydroxide hydrothermal synthesis

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Atomistic study on the structural properties of GdFe2xTx(T=Ti,Al) compounds

Atomistic study on the structural properties of GdFe2xTx(T=T...

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第八届中国功能材料及其应用学术会议

作者： XIAO Ling-ping Jiangxi blue Sky University

ISBN: (纸本)9783037859698

The structural properties of GdFeT(T=Ti,Al) and their hydrides are studied by using inter-atomic potentials based on Chen’s lattice inversion *** results show that GdFeAl crystallizes with the MgZn type phase in the range 0.35 ≤x≤*** GdFeTi crystallizes with the MgZntype phase has the lowest energy for 0≤x≤0.17 and the tolerance is *** GdFeTi compounds are stabilized in MgZn type phase with different Ti atoms content in the range 0.17

关键词： Rare earth compounds Interatomic potentials Site preference Computer simulation

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The impacts of land-use and land-cover change on wetland ecosystem service values in peri-urban and urban area of Bahir Dar City, Upper blue Nile Basin, Northwestern Ethiopia

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Ecological Processes 2021年第1期10卷 510-527页

作者： Workiyie Worie Assefa Belachew Getnet Eneyew Ayalew Wondie Department of Biology College of ScienceBlue Nile Water InstituteBahir Dar UniversityP.O.Box 79Bahir DarEthiopia. College of Social Science Blue Nile Water InstituteBahir Dar UniversityP.O.Box 79Bahir DarEthiopia. School of Fisheries and Wildlife College of Agriculture and Environmental SciencesBahir Dar UniversityP.O.Box 79Bahir DarEthiopia.

Background:Even though wetlands are essential in enhancing water quality and providing recreation and entertainment opportunities in urban areas,their values are overlooked by the *** of the economic value of wetland ecosystem services contributes to their continuing deterioration and inevitable *** the changes in ecosystem service values(ESV)can provide crucial information for *** study,therefore,analyzes the temporal and spatial land-use/land-cover(LULC)change patterns over 35 years(1984–2019)intending to evaluate its impact on wetland ecosystem service values in Bahir Dar City,*** and change analyses of ESVs were conducted by employing ArcGIS using LULC inputs of the year 1984,1994,2004,2014,and 2019 with their corresponding global value coefficients that were developed earlier and our own modified value coefficients for the studied ***:The results showed that wetlands and water bodies of the city and its peripheries had decreased by 75.71%(−1618 ha)within 35 years,while built-up area increased by 216.24%(+2599 ha).Cultivated land had increased slightly from 1984 to 1994 and then gradually declined since *** in LULC had resulted in a decline of the total *** total ESV had decreased from USD 29.73×10^(6) to USD 20.84×10^(6) in 35 *** indicates the loss of nearly USD 8.9×10^(6) ESV from 1984 to 2019.A sensitivity analysis suggested the robustness of ESV estimation in the study *** individual ecosystem services experienced a negative ***,a greater reduction in ESV was observed for services such as water regulation,waste treatment,and habitats for maintaining *** expansion of built-up area of Bahir Dar City was the major factor that contributed to the loss of ESV provided by ***:The loss of ESV resulting in LULC changes has a negative implication on local climate,waste management,and the livelihoods of the poor co

关键词： Ecosystem service Economic valuation Land use/land cover Landscape change Urban wetland

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Aminoclay decorated with lanthanide complexes and carbon dots:Tunable emission and information encryption

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Journal of Rare Earths 2019年第9期37卷 995-1001,I0004页

作者： Tianren Wang Jing Yang Huanrong Li Yige Wang Hebei Provincial Key Lab of Green Chemical Technology and High Efficient Energy saving School of Chemical Engineering and TechnologyHebei University of Technology

Herein we present emission color-tunable and multi-functional lanthanide(Ⅲ)luminescent hybrid materials(Ln(DPA)@AC-CDs)by mixing aminoclay(AC),2,6-pyridinedicarboxylic acid(DPA),Ln3+(Ln=Eu,Tb or Eu and Tb in different molar ratios),and carbon dots(N,S-CDs)in water,showing high quantum yields up to 58.8%.The emission colors can be finely tuned by altering the excitation wavelength and the amounts of the components,and white light emission(CIE-(0.27,0.25))can be achieved for sample Eu1Tb2(DPA)@AC-CDs under 325 nm light *** addition,under 365 nm UV light excitation,the Eu(DPA)@AC-CDs powder exhibits red luminescence due to the sensitization effect of N,S-CDs on Eu^3+,which turns to bright blue when the powder is dispersed in water attributed to the high dispersion of the aggregated N,S-CDs *** luminescent properties afford Ln(DPA)@AC-CDs potential candidates for designing optoelectronic devices like WLEDs or in information encryption applications.

关键词： Lanthanide Carbon dots Hybrid material White light Information encryption Rare earths

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Whole-process optimization for industrial production of glucosamine sulfate sodium chloride based on QbD concept

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Chinese Journal of Chemical Engineering 2023年第2期54卷 153-161页

作者： Yingjun Lin School of Pharmacy Shanghai Jiao Tong UniversityShanghai 200240China Xiamen blue Bay Science&Technology Co.Ltd Xiamen 361026China

The double salt of glucosamine sulfate sodium chloride(glucosamine-SP) is an important pharmaceuticals ingredient for healing osteoarthritis. However, the study about its industrial production is rarely documented, let alone the optimization over the whole process to produce glucosamine-SP using glucosamine hydrochloride and anhydrous sodium sulfate as synthetic raw materials. In order to improve the production efficiency, this study screened the process parameters based on the concept of quality by design(QbD), optimized 13 operational parameters related to reaction and separation in the process, and finally proposed the mixed dropping process. The reaction conditions for the preparation of glucosamineSP were found as follows: the molar ratio of anhydrous sodium sulfate to glucosamine hydrochloride is 0.42, the mass ratio of water to glucosamine hydrochloride is is 2.0, the reaction temperature is 50 ℃ and the reaction time is 1 h. Through step-by-step scaling up following QbD, the mixed dropping process was successfully applied to achieve a trial production of 200 kg products satisfying national quality *** all, the results of this study have high technical value and guiding significance for the industrial mass production of glucosamine-SP.

关键词： Glucosamine sulfate sodium chloride Optimization Quality by design(QbD) Production Glucosamine hydrochloride Sodium sulfate

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Optical and electrical properties of BaSnO_(3) and In_2O_(3) mixed transparent conductive films deposited by filtered cathodic vacuum arc technique at room temperature

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Chinese Physics B 2023年第1期32卷 559-562页

作者：姚建可钟文森 College of Materials&New Energy South China Normal UniversityShanwei 516625China blue Lake Optic-electronic Company Huizhou 516001China

For the crystalline temperature of BaSnO_(3)(BTO)was above 650℃,the transparent conductive BTO-based films were always deposited above this temperature on epitaxy substrates by pulsed laser deposition or molecular beam epitaxy till now which limited there application in low temperature device *** the article,the microstructure,optical and electrical of BTO and In_(2)O_(3) mixed transparent conductive BaInSnO_(x)(BITO)film deposited by filtered cathodic vacuum arc technique(FCVA)on glass substrate at room temperature were firstly *** BITO film with thickness of 300 nm had mainly In_(2)O_(3) polycrystalline phase,and minor polycrystalline BTO phase with(001),(011),(111),(002),(222)crystal faces which were first deposited at room temperature on amorphous *** transmittance was 70%–80%in the visible light region with linear refractive index of 1.94 and extinction coefficient of 0.004 at 550-nm *** basic optical properties included the real and imaginary parts,high frequency dielectric constants,the absorption coefficient,the Urbach energy,the indirect and direct band gaps,the oscillator and dispersion energies,the static refractive index and dielectric constant,the average oscillator wavelength,oscillator length strength,the linear and the third-order nonlinear optical susceptibilities,and the nonlinear refractive index were all *** film was the n-type conductor with sheet resistance of 704.7Ω/□,resistivity of 0.02Ω⋅cm,mobility of 18.9 cm2/V⋅s,and carrier electron concentration of 1.6×10^(19) cm^(−3) at room *** results suggested that the BITO film deposited by FCVA had potential application in transparent conductive films-based low temperature device process.

关键词： BaSnO_(3)and In_2O_(3)mixed film filtered cathodic vacuum arc deposition transparent conductive films microstructure optical properties electrical properties

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Enhanced Photoelectric Property of Mo-C Codoped TiO2 Films Deposited by RF Magnetron Cosputtering

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Journal of Wuhan University of Technology(Materials Science) 2017年第2期32卷 223-228页

作者：罗胜耘 YAN Bingxi 沈杰 Department of Materials Science Fudan University Shanghai 200433 China Special and Key Laboratory of Guizhou Provincial Higher Education for Green Energy-saving Materials Guizhou Minzu University Guiyang 550025 China

Mo-C codoped TiO2 films were prepared by RF magnetron cosputtering. Ultraviolet-visible spectroscopy, atomic force microscopy, X-ray photoelectron spectroscopy, energy dispersive X-ray Analysis and X-Ray Diffraction were used to study the influences of codoping on energy gap, surface morphology, valence states of elements, ions content and crystal structure, respectively. The concentration of photogenerated carriers was measured by studying photocurrent density, while catalytic property was evaluated by observing degradation rate of methylene blue under visible light. A Mo-doped TiO2 film, whose content of Mo had been optimized in advance, was prepared and later used for subsequent comparisons with codoped samples. The result indicates that Mo-C codoping could curtail the energy gap and shift the absorption edge toward visible range. Under the illumination of visible light, codoped TiO2 films give rise to stronger photocurrent due to smaller band gaps. It is also found that Mo, C codoping results in a porous surface, whose area declines gradually with increasing carbon content. Carbon and Molybdenum doses were delicately optimized. Under the illumination of visible light, sample doped with 9.78at% carbon and 0.36at% Mo presents the strongest photocurrent which is about 8 times larger than undoped TiO2 films, and about 6 times larger than samples doped with Mo only.

关键词： Mo-C codoping TiO2 film magnetron sputtering photoelectric photocatalytic property

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Microdroplet splitting and mixing by portable triboelectric nanogenerator

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Nano Research 2025年第2期18卷 741-750页

作者： Qi Gao Qin Xiang Wenkai Liu Mengru Ding Wei Long Jianlong Wang Xiaojun Cheng Hengyu Li Zhong Lin Wang Tinghai Cheng Guangzhou Institute of blue Energy Knowledge CityHuangpu DistrictGuangzhou 510555China State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310027China Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 101400China Faculty of Mechanical and Electrical Engineering Kunming University of Science and TechnologyKunming 650500China

Theadvancementofdigital microfluidics technology has been pivotal in academic research andengineering ***,the prevailing limitation is that traditional voltage sources generate an excess of Joule heat,adversely impacting droplet ***,the power supply equipment required by digital microfluidics limits its ***,we propose a self-powered microdroplet manipulation(SMDM)via triboelectric nanogenerator(TENG),which presents a capability for spliting and mixing different kinds of ***,SMDM is based on the electroosmotic flow principle,thereby enabling droplet spliting in the range of from 2 to 630μ***,for droplet spliting in the range of from 5 to 60μL,the TENG only requires a power output ranging from 2.704 to 6.084 *** addition,SMDM demonstrates proficiency in droplet mixing,which achieves complete mixing of 10μL droplets in 60 s and 30μL droplets in a mere 53 ***,leveraging the strengths of the TENG,a self-powered microdroplet manipulated system is designed for digital *** carries significant advantages over the traditional voltage source,including self-powered,low-Joule heat,increased safety and enhanced *** research provides a new solution for portable applications of digital microfluidics.

关键词： triboelectric nanogenerator microdroplet manipulation digital microfluidics droplet splitting droplet mixing

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