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Nano Research 2023年第1期16卷 371-376页

作者： juhua luo Ziyang Dai Mengna Feng Mingmin Gu Yu Xie School of Materials Science and Engineering Yancheng Institute of TechnologyYancheng 224051China School of Environmental and Chemical Engineering Nanchang Hangkong UniversityNanchang 330063China

High stability and efficient charge separation are two critical factors to construct high-performance ***,an efficient strategy was provided to fabricate the nanocomposite of graphitic carbon nitride/ferroferric oxide/reduced graphene oxide(g-C_(3)N_(4)/Fe_(3)O_(4)/RGO).The degradation of rhodamine B(RhB)by g-C_(3)N_(4)/Fe_(3)O_(4)/RGO nanocomposite followed the pseudofirst-order *** g-C_(3)N_(4)/Fe_(3)O_(4)/RGO nanocomposite exhibited excellent stability and magnetically separable *** was ascertained that the quantum efficiency and separation efficiency of photoexcited charge carriers of g-C_(3)N_(4)/Fe_(3)O_(4)/RGO nanocomposite were obviously ***,the g-C_(3)N_(4)/Fe_(3)O_(4)/RGO nanocomposite with 3 wt.%RGO presented 100%degradation efficiency under visible light irradiation for 75 *** remarkable photocatalytic degradation activity is attributed to the synergistic interactions among g-C_(3)N_(4),Fe_(3)O_(4),and RGO,along with the efficient interfacial charge separation.

关键词： graphitic carbon nitride ferroferric oxide reduced graphene oxide visible light photocatalyst

Construction of novel g-C_(3)N_(4)/β-FeOOH Z-Scheme heterostructure photocatalyst modified with carbon quantum dots for efficient degradation of RhB

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Journal of Materials Science & Technology 2024年第14期181卷 11-19页

作者： juhua luo Xing Liu Jieliang Gu Wenjie Zhao Minming Gu Yu Xie School of Materials Science and Engineering Yancheng Institute of TechnologyYancheng 224051China Jiangsu Provincial Key Laboratory of Eco-Environmental Materials Yancheng Institute of TechnologyYancheng 224051China College of Environment and Chemical Engineering Nanchang Hangkong UniversityNanchang 330063China

The degradation of organic pollutants using semiconductor photocatalysts is a new ecological approach,but the currently available photocatalysts are not very ***,in order to obtain efficient visible-light photocatalysts,g-C_(3)N_(4)/β-FeOOH-modified carbon quantum dots(CDs)composite photocat-alysts with Z-Scheme charge transfer mechanism were successfully *** phase composition and morphology of the composite were characterized by X-ray diffraction(XRD),scanning electron mi-croscopy(SEM),transmission electron microscopy(TEM),Fourier transform infrared spectrophotometry(FT-IR),and X-ray photoelectron spectroscopy(XPS)*** to the upconversion effect of the CDs,the optical response range of the composite was effectively widened,and the optical utilization rate was *** Z-Scheme heterostructure not only improves the light trapping ability,significantly inhibits charge-carrier complexation,and realizes the spatial separation of redox sites,but also ensures that the photocatalyst maintains a suitable valence-conductivity band position and maintains the strong redox *** addition,CDs have the unique characteristics of electronic storage and transfer,which effectively enhance the quantum separation efficiency of the *** photocatalytic efficiency was measured by degrading rhodamine B(RhB)under visible *** degradation performance was the best when the weight ratio of CDs was 6%,and the RhB solution degradation rate reached 100%in 60 *** unique structure and reliable mechanism provide a way for the development of advanced photocat-alyst.

关键词： Photocatalyst Degradation Visible light g-C_(3)N_(4) Carbon quantum dots

1D/2D CoTe_(2)@MoS_(2)composites constructed by CoTe_(2)nanorods and MoS_(2)nanosheets for efficient electromagnetic wave absorption

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Nano Research 2023年第7期16卷 10698-10706页

作者： Naixin Zhai juhua luo Pengcheng Shu Jie Mei Xiaopeng Li Wenxing Yan School of Materials Science and Engineering Yancheng Institute of TechnologyYancheng 224051China Jiangsu Provincial Key Laboratory of Eco-Environmental Materials Yancheng Institute of TechnologyYancheng 224051China

Rational design of the components and microstructure is regarded as an efficacious strategy for the high-performance electromagnetic wave absorbing(EMWA)***,the CoTe_(2)@MoS_(2)nanocomposites with CoTe_(2)nanorods and MoS_(2)nanosheets were synthesized via a hydrothermal *** microstructure and composition of the samples were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),energy dispersive X-ray spectroscopy(EDS),transmission electron microscopy(TEM),and X-ray photoelectron spectroscopy(XPS).The CoTe_(2)@MoS_(2)composite was composed of stacked CoTe_(2)as the core and intertwined MoS_(2)nanosheets as the *** electromagnetic parameters of the CoTe_(2)@MoS_(2)composites were investigated by vector network analyzer(VNA).The EMWA property of the composite showed a trend of first increasing and then decreasing with the increasing content of MoS_(2).When the mass ratio of MoS_(2)and CoTe_(2)was 1:1,the CoTe_(2)@MoS_(2)composite exhibited the minimum reflection loss value of-68.10 dB at 4.71 GHz,and the effective absorption bandwidth value might reach 4.64 GHz(13.08-17.72 GHz)at a matching thickness of 1.60 mm with filler loading of 50 wt.%.The extraordinary EMWA property was attributed to the optimized impedance matching,multiple scattering and reflections,dipole polarization,conductive loss,and interfacial ***,the present approach to the design of microstructure and interface engineering offers a crucial way to construct high-performance EMW absorbers.

关键词： transition metal tellurides microstructure design heterostructure engineering electromagnetic wave absorption

MoS_(2) wrapped MOF-derived N-doped carbon nanocomposite with wideband electromagnetic wave absorption

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Nano Research 2022年第7期15卷 5781-5789页

作者： juhua luo Mengna Feng Ziyang Dai Chenye Jiang Wei Yao Naixin Zhai School of Materials Science and Engineering Yancheng Institute of TechnologyYancheng 224051China

Designing electromagnetic wave absorption(EMWA)materials with wide bandwidth,strong absorption,and light weight is still a great challenge for practical ***,the novel nitrogen doped carbon(NDC)/MoS_(2) composite with rationally designed composition and structure was *** NDC particles were introduced into MoS_(2) nanosheets through the calcination of ZIF-8 precursor and consequent hydrothermal process.A series of characterizations were carried out to investigate the physical properties of the as-prepared *** NDC particles exhibited the shape of rhombic dodecahedron with the size of about 500 nm,which were decorated on flower-shaped MoS_(2) with the size of about 3μ*** the increasing NDC content,the absorbing properties of NDC/MoS_(2) composites increased firstly and then *** features of NDC/MoS_(2) composite including interconnected porous structure,nitrogen dopant,and appropriate electrical conductivity gave rise to the polarization,multiple reflection,multiple scattering,and impedance matching,resulting in the outstanding EMWA *** a filler loading ratio of 30 wt.%,the optimized EMWA property can be achieved when the mass ratio of NDC to MoS_(2) was adjusted to be 1:*** a coating thickness of 3.0 mm,the effective EMWA bandwidth(<−10 dB)reached 6.08 GHz(8.56–14.64 GHz).These satisfactory achievements provide a way for the reasonable design of high-performance EMWA and new ideas for future research on wideband EMWA.

关键词： metal organic framework materials nitrogen doped carbon molybdenum disulfide wideband absorption

Carbon nanotubes decorated FeNi/nitrogen-doped carbon composites for lightweight and broadband electromagnetic wave absorption

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Journal of Materials Science & Technology 2023年第27期158卷 207-217页

作者： juhua luo Wenxing Yan Xiaopeng Li Pengcheng Shu Jie Mei Yafan Shi School of Materials Science and Engineering Yancheng Institute of TechnologyYancheng 224051China Jiangsu Provincial Key Laboratory of Eco-Environmental Materials Yancheng Institute of TechnologyYancheng 224051China

Magnetic-dielectric component modulation and heterogeneous interface engineering were considered as an effective strategy for designing lightweight and broadband electromagnetic wave(EMW)***,a series of carbon nanotubes(CNTs)decorated core-shell nitrogen-doped carbon(CNTs/FeNi/NC)composites were successfully fabricated via the carbonization of CNTs/NiFe_(2)O_(4)/PDA precursors obtained by hydrothermal and polymerization *** EMW absorption(EMWA)properties of CNTs/FeNi/NC composites were explored by varying the CNTs *** the CNTs content was 15%,the minimum reflection loss(RL_(min))value was-51.13 dB at 9.52 GHz and the corresponding effective absorption band-width(EAB)value was 2.96 GHz(8.96-11.12 GHz)at 2.5 ***,the maximum EAB value can reach up to 4.64 GHz(12.80-17.44 GHz)at 1.7 *** excellent EMW attenuation capability resulted from the enhanced conductive loss,polarization loss,magnetic loss,and improved impedance *** work offers a novel reference for designing lightweight and broadband EMWA materials.

关键词： Carbon nanotubes Nano-heterogeneous interface engineering Electromagnetic wave absorption Impedance matching

Hierarchically porous carbon derived from natural Porphyra for excellent electromagnetic wave absorption

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Journal of Materials Science & Technology 2022年第34期129卷 206-214页

作者： juhua luo Ziyang Dai Mengna Feng Xiaowen Chen Caihong Sun Ying Xu School of Materials Science and Engineering Yancheng Institute of TechnologyYancheng 224051China National and Local Joint Engineering Research Center for Mineral Salt Deep Utilization Huaiyin Institute of TechnologyHuaiyin 223003China

A highly efficient absorber with features including lightweight, broad bandwidth, and tunable electromagnetic property still remains challenging for practical applications. Herein, the Porphyra-derived porous carbon(PPC) was fabricated via facile procedures of low-temperature pre-carbonization combined with KOH chemical activation. The composition, microstructure, and electromagnetic wave absorption properties of the samples were elucidated based on X-ray diffraction(XRD), Raman, X-ray photoelectron spectroscopy(XPS), scanning electron microscopy(SEM), transmission electron microscopy(TEM),Brunauer-Emmer-Teller(BET), and vector network analyzer(VNA). The porosity of PPC can be readily regulated by adjusting activation temperature. The PPC obtained at 750 ℃ was composed of a threedimensional hierarchically porous carbon network. The C and N elements of natural Porphyra were introduced into the carbon skeleton during the carbonization process. The large specific surface, dopants, and three-dimensional hierarchically porous carbon network can effectively improve the impedance matching and dielectric dissipation, leading to an excellent electromagnetic wave absorption performance. Especially, the optimal reflection loss(RL) value reached –57.75 d B at 9.68 GHz with a broad bandwidth(RL< –10 d B) value of 7.60 GHz at 3.5 mm. Overall, the results indicate that the PPC can provide a new way to achieve lightweight, effective, and sustainable absorbers.

关键词： Porphyra-derived carbon Hierarchically porosity Electromagnetic wave absorption Broad bandwidth Lightweight

Trade-offs and Synergies of Ecosystem Services in the Taihu Lake Ba- sin of China

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Chinese Geographical Science 2018年第1期28卷 86-99页

作者： QIAO Xuning GU Yangyang ZOU Changxin WANG Lei luo juhua HUANG Xianfeng School of Surveying and Land Information Engineering Henan Polytechnic University Jiaozuo 454003 China Nanjing Institute of Environmental Science Ministry of Environmental Protection Nanjing 210042 China Key Laboratory of Watershed Geographic Sciences Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing 210008 China Department of Geography & Anthropology Louisiana State University Baton Rouge LA 70803 USA Guizhou Institue of Environmental Sciences Research and Design Guiyang 550018 China

Understanding the spatial interactions among multiple ecosystem services is crucial for ecosystem services management. Ecosystem services, including crop production, freshwater supply, aquatic production, net primary production, soil conservation, water conservation, flood regulation, forest recreation, were measured at 1-km grid scale covering the Taihu Lake Basin(TLB) of China. Our objective is to get a comprehensive understanding of the spatial distributions, trade-offs, synergies of multiple ecosystem services across the TLB. Our results found that: 1) majority of ecosystem services were clustered in space and had a similar spatial distribution pattern with the geographical resource endowment. Most of the landscape contributed a high supply of no services, one or two, and a low supply of three to seven services. 2) There were high correlation between forest recreation and freshwater supply and regulating services. Aquatic production had low correlation with other services. 3) The changes of provisioning services led to trade-offs between regulating services and cultural services in the TLB, while synergies mainly occurred among the provisioning service. 4) The spatial relationships of multiple services are consistent at 1-km spatial scale, counties and provinces. This research could help integrate multiple ecosystem services across scales and serve as a reference for decision making.

关键词： ecosystem services spatial pattern Principal Component Analysis trade-offs synergies Taihu Lake Basin (TLB)

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Co-Ni纳米合金的制备与表征

特种铸造及有色合金 2007年第12期27卷 974-975页

作者：罗驹华盐城工学院江苏省生态环境材料重点建设实验室

以NaBH4为还原剂、油酸为分散剂、采用液相还原法制备了Co-Ni纳米合金,利用XRD、SEM和VSM对试样进行了表征。研究结果表明,在N2气保护下,经500℃焙烧,试样由无定形态转化为晶态;颗粒呈球形,平均粒径为35nm;Co-Ni合金的抗氧化能力较强,... 详细信息

以NaBH4为还原剂、油酸为分散剂、采用液相还原法制备了Co-Ni纳米合金,利用XRD、SEM和VSM对试样进行了表征。研究结果表明,在N2气保护下,经500℃焙烧,试样由无定形态转化为晶态;颗粒呈球形,平均粒径为35nm;Co-Ni合金的抗氧化能力较强,在常温下不易被氧化;饱和磁化强度为83.7A.m2/kg,矫顽力趋近于零,呈现超顺磁性。

关键词：纳米 Co—Ni合金制备表征

Protective layer for stable lithium-metal anodes at 60 mA·h/cm^(2) and 60 mA/cm^(2) with ion channel and inductive effect

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Journal of Materiomics 2024年第6期10卷 1252-1260页

作者： Xiao Zhang Zhiwei Chen Jiaojiao Han Qiang Wang Jinshan Wang juhua luo Jianguang Xu Chi Chen Wei Yao School of Materials Science and Engineering Jiangsu Provincial Key Laboratory of Eco-Environmental MaterialsYancheng Institute of TechnologyYancheng 224051China School of Materials and Energy Shanghai Key Laboratory of Engineering Materials Application and EvaluationShanghai Polytechnic UniversityShanghai 201209China CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials and Xiamen Institute of Rare Earth MaterialsHaixi InstituteChinese Academy of SciencesXiamen 361021China

Contradiction between ultrafast nucleation and deposition rates of lithium(Li)crystals at high rate and heterogeneity of Li^(+)flux resulting from concentration polarization has compromised the performance of Li metal anodes especially at high areal capacity and current ***,multifunctional protective layer consisting of MoO_(3) nanobelt films(MoO_(3)-NF)is introduced on the surface of Li by a simple rolling *** strong binding energy between Li and MoO_(3) guides the homogeneous nucleation and deposition of Li,while the nanobelt networks provide effective ion channels for uniform distribution of the Li+*** of the novel multifunctional protective layer,the MoO_(3)-NF@Li anodes demonstrate a remarkable stability for 800 h with ultralow overpotential of 159 mV at extreme harsh conditions of 60 mA·h/cm^(2) and 60 mA/cm^(2).MoO_(3)-NF@Li||LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2) full-cells can run 100 cycles with a superior capacity retention of 84.2%under practical test conditions,demonstrating great potential for high output and energy-density metal batteries.

关键词： Multifunctional protective layer Ion channel Inductive effect High areal capacity Li metal anodes

Characterization of the Rice Canopy Infested with Brown Spot Disease Using Field Hyperspectral Data

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Wuhan University Journal of Natural Sciences 2012年第1期17卷 86-92页

作者： ZHAO Jinling ZHANG Dongyan luo juhua DONG Yingying YANG Hao HUANG Wenjiang Beijing Research Center for Information Technology inAgriculture Beijing Academy of Agriculture and ForestrySciences Beijing 100097 China . Institute of Remote Sensing Applications Chinese Academyof Sciences Beijing 100101 China

Based on the field hyperspectral data from the analytical spectral devices （ASD） spectrometer, we characterized the spectral properties of rice canopies infested with brown spot disease and selected spectral regions and bands sensitive to four severity degrees （severe, moderate, light, and healthy）. The results show that the curves＇ variation on the original and the first- and second-order de- rivative curves are greatly different, but the spectral difference in the near-infrared region is the most obvious for each level. Specifically, the peaks are located at 822, 738, and 793 nm, while the valleys are located at 402, 570, and 753 run, respectively. The sensitive regions are between 430-520, 530-550, and 650-710 nm, and the bands are 498, 539, and 673 nm in the sensitivity analysis, while they are in the ranges of 401-530, 550-730 as well as at 498 nm and 678 nm in the continuum removal.

关键词： rice brown spot disease sensitive bands disease severity degree derivative transformation spectra continuum removal method sensitivity analysis method