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Optical grade (Gd_(0.95-x)Lu_(x)Eu_(0.05))_(3)Al_(5)O_(12) ceramics with near-zero optical loss: Effects of Lu^(3+) doping on structural feature, microstructure evolution, and far-red luminescence

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Journal of Advanced Ceramics 2024年第1期13卷 113-123页

作者： Zhigang Sun Ji-Guang Li Huiyu Qian Yoshio Sakka Tohru SSuzuki Bin Lu School of Materials Science and Chemical Engineering Ningbo UniversityNingbo 315211China Research Center for Electronic and Optical Materials National Institute for Materials ScienceIbaraki 305-0044Japan key laboratory of photoelectric detection Materials and Devices of Zhejiang Province Ningbo 315211China

A chemical co-precipitation strategy was employed to synthesize a series of(Gd_(0.95−x)Lu_(x)Eu_(0.05))_(3)Al_(5)O_(12)(x=0.1−0.95)powder phosphors,followed by vacuum sintering to achieve transparent garnet ceramic *** density functional theory indicated Lu_(3)Al_(5)O_(12) was formed in priority compared with Gd_(3)Al_(5)O_(12) during solid-phase *** high-temperature sintering,the Lu^(3+)substitution for Gd^(3+)suppressed point mass diffusion leading to a smaller grain *** in-line transmittances of bulk specimens with x=0.1,0.3,0.5,0.7,and 0.95 nm were~83.5%,80.1%,68.8%,73.7%,and 82.2%at 710 nm(Eu^(3+)emission center),respectively,among which the sample of x=0.1 exhibited the optical grade with near-zero optical loss in agreement with the defect-free single crystal(~100%of the theoretical transmittance).The resulting particle and ceramic materials both presented characteristic Eu^(3+)emission arising from 5D0→7FJ(J=1−4)transition,where the dominant far-red emission at~710 nm arising from ^(5)D_(0)→^(7)F_(4) transition overlapped with the absorption of phytochrome(PFR).The photoluminescence excitation and photoluminescence intensities of(Gd_(0.95−x)Lu_(x)Eu_(0.05))_(3)Al_(5)O_(12) powders and ceramics generally increased at a higher Gd^(3+)/Lu^(3+)***^(3+)dopants delayed the fluorescence lifetime while the bulk samples had shorter lifetime compared to the particle *** transparent(Gd_(0.85)Lu_(0.1)Eu_(0.05))3Al_(5)O_(12) ceramic phosphor exhibited good thermal stability with a high thermal quenching temperature above 533 *** designed ceramic phosphor-converted light-emitting diode had a saturation injection current of 435 mA and a current-dependent color rendering *** importantly,our report marked the developmental stage of transparent ceramic materials towards zero optical loss.

关键词： transparent ceramics garnet phosphors light-emitting diode(LED) optical properties Gibbs free energy

Simultaneous quantification of trace heavy metals in mushrooms using a three-dimensional highly reduced graphene oxide/FeOnanocomposite-based electrochemical sensor

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Food Science and Human Wellness 2024年

作者： Yiming Tian Pingsheng Zhong Kai Zhou Lufei Zheng Jiali Ren Hunan key laboratory of Forestry Edible Resources Safety and Processing Hunan key laboratory of grain-oil Deep Process and Quality control Central South University of Forestry and Technology Institute of Quality Standard and Testing Technology for Agro-Products of CAAS

The accumulation of heavy metals in mushrooms has presented a significant risk to human health， underscoring the importance of devising a portable and cost-effective method for detecting heavy metals. Thus， we have developed an electrochemical sensor based on 3-dimensional highly reduced graphene oxide (3D-HRGO) in conjunction with Fe3O4nanoparticles， enabling the simultaneous quantification of Cd2+， Pb2+， Cu2+， and Hg2+. The 3D-HRGO/Fe3O4nano-particles material prepared in this study was characterized and confirmed by multiple techniques， then dispersed in a simple and environmental dispersant， consist of 75% ethanol and 0.1% Nafion， and coating on a glass carbon electrode (GCE) to preparing a 3D-HRGO/Fe3O4/GCE sensor. The limit of detection (LOD) of 3D-HRGO/Fe3O4/GCE sensor for Cd2+， Pb2+， Cu2+， and Hg2+in simultaneous detection were 0.2 μg/L， 0.6 μg/L， 0.6 μg/L， and 0.9 μg/L， respectively. The sensor demonstrates exceptional stability， reproducibility， anti-interference， and recovery rate. Furthermore， the electrochemical sensor was employed to detect heavy metals in actual mushrooms and validated through conventional methodologies. This study represents the pioneering utilization of 3D-HRGO/Fe3O4as a foundational material for an electrochemical sensor capable of simultaneous detection of multiple metals， thereby advancing the progress of on-site and expeditious detection techniques.

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Fluorescence sensor based on IFE between AEP@UCNPs and oxTMB for the determination of Cdin paddy rice combined with HRP enzyme inhibition mechanism

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Food Science and Human Wellness 2024年

作者： Haizhen Ding Shuai Hou Siqi Zhao Liping Guo Ao Sun Qiuhui Hu Leiqing Pan Qiang Liu Chao Ding College of Food Science and Technology Nanjing Agricultural University Collaborative Innovation Center for Modern grain Circulation and Safety key laboratory of grains and Oils Quality control and Processing College of Food Science and Engineering Nanjing University of Finance and Economics

Cadmium ion (Cd2+) detection technology plays a prominent role in food safety and human health. Herein， we designed and constructed an 2-aminoethyl dihydrogen phosphate (AEP)@upconversion nanoparticles (UCNPs) fluorescence sensor for quantitative detection of Cd2+in paddy rice based on Inner filter effect (IFE) combined with enzyme inhibition mechanism. The AEP modification UCNPs can offer a stable fluorescence donor at 658 nm and be quenched by the oxidized tetramethylbenzidine (oxTMB) catalyzed by horseradish peroxidase (HRP) enzymes. Without addition of Cd2+， the fluorescence of AEP@UCNPs fluorescence sensor was weaken due to the IFE between AEP@UCNPs and oxTMB. With addition of Cd2+， HRP enzyme activity was inhibited by Cd2+， leading to the decreased oxTMB， resulting in the enhance upconversion fluorescence intensity. As a result， the fluorescence intensity signal at 658 nm of the IFE-based AEP@UCNPs fluorescence sensor increased linearly with the increase in Cd2+in a wide range from 0.5 μmol/L to 6? μmol/L and the limit of detection (LOD) was 24.6 nmol/L. In addition， our proposed IFE-based AEP@UCNPs fluorescence sensor can achieve Cd2+detection in paddy rice in 30 min.

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Determination of potassium sorbate and sorbic acid in agricultural products using THz time-domain spectroscopy

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Chinese Physics B 2020年第9期29卷 122-128页

作者：蒋玉英李广明吕明葛宏义张元 key laboratory of grain Information Processing and control(henan University of Technology) Ministry of EducationZhengzhou 450001China henan Provincial key laboratory of grain photoelectric detection and control Zhengzhou 450001China College of Information Science and Engineering Henan University of TechnologyZhengzhou 450001China

t The aim of this study was to investigate the feasibility of detecting potassium sorbate(PS)and sorbic acid(SA)in agricultural products using THz time-domain spectroscopy(THz-TDS).The absorption spectra of PS and SA were measured from 0.2 to 1.6 THz at room *** main characteristic absorption peaks of PS and SA in polyethylene and powdered agricultural products with different weight ratios were detected and *** partial least squares(iPLS)combined with a particle swarm optimization and support vector classification(PSO-SVC)algorithm was proposed in this *** was used for frequency optimization,and the PSO-SVC algorithm was used for spectrum analysis of the preservative content based on the optimal spectrum *** PSO-SVC models were obtained when the THz spectrum from the PS/SA mixture was divided into 11 or 12 *** optimal penalty parameter c and kernel parameter g were found to be 1.284 and 0.863 for PS(0.551-1.487 THz),1.374 and 0.906 for SA(0.454-1.216 THz),*** preliminary results indicate that THz-TDS can be an effective nondestructive analytical tool used for the quantitative detection of additives in agricultural products.

关键词： THz-TDS preservative content quantitative analysis iPLS PSO-SVC nondestructive detection

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Wi-Wheat+:Contact-free wheat moisture sensing with commodity WiFi based on entropy

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Digital Communications and Networks 2023年第3期9卷 698-709页

作者： Weidong Yang Erbo Shen Xuyu Wang Shiwen Mao Yuehong Gong Pengming Hu College of Information Science and Engineering Henan University of TechnologyZhengzhou450001China henan key laboratory of grain photoelectric detection and control Zhengzhou450001China College of International Education Kaifeng UniversityKaifengHenan475004China Knight Foundation School of Computing&Information Sciences Florida International UniversityMiamiFL33199USA Department of Electrical and Computer Engineering Auburn UniversityAuburnAL36849-5201USA

In this paper,we propose a contact-free wheat moisture monitoring system,termed Wi-Wheatþ,to address the several limitations of the existing grain moisture detection technologies,such as time-consuming process,expensive equipment,low accuracy,and difficulty in real-time *** proposed system is based on Commodity WiFi and is easy to *** WiFi CSI data,this paper proposes a feature extraction method based on multi-scale and multi-channel *** feasibility and stability of the system are validated through experiments in both Line-Of-Sight(LOS)and Non-Line-Of-Sight(NLOS)scenarios,where ten types of wheat moisture content are tested using multi-class Support Vector Machine(SVM).Compared with the Wi-Wheat system proposed in our prior work,Wi-Wheatþhas higher efficiency,requiring only a simple training process,and can sense more wheat moisture content levels.

关键词： Channel state information(CSI) WiFi Multi-scale entropy Multi-class support vector machine(SVM) Radio frequency(RF)sensing

Optical techniques in non-destructive detection of wheat quality:A review

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grain & Oil Science and Technology 2022年第1期5卷 44-57页

作者： Lei Li Si Chen Miaolei Deng Zhendong Gao key laboratory of grain Information Processing and control(henan University of Technology) Ministry of EducationZhengzhou 450001China College of Information Science and Engineering Henan University of TechnologyZhengzhou 450001China

Wheat quality detection is essential to ensure the safety ofwheat circulation and *** traditional wheat quality detection methods mainly include artificial sensory evaluation and physicochemical index analysis,which are difficult to meet the requirements for high accuracy and efficiency in modern wheat quality detection due to the disadvantages of subjectivity,destruction of sample integrity and low *** the rapid development of optical technology,various optical-based methods,using near-infrared spectroscopy technology,hyperspectral imaging technology and terahertz,etc.,have been proposed for wheat quality *** methods have the characteristics of nondestructiveness and high efficiency which make them popular in wheat quality detection in recent *** this paper,various state-of-the-art optical-based techniques of wheat quality detection are analyzed and summarized in ***,the principle and process of common optical non-destructive detection methods for wheat quality are ***,the optical techniques used in these detection methods are divided into seven categories,and the comparison of these technologies and their advantages and disadvantages are further *** shows that terahertz technology is regarded as the most promising wheat quality detection method compared with other optical detection technologies,because it can not only detect most types of wheat deterioration,but also has higher accuracy and ***,the research of optical technology in wheat quality detection is *** future research of optical technology-based wheat quality detection mainly includes the construction of wheat quality optical detection standardization database,the fusion of multiple optical detection technologies and multiple quality index information,the improvement of the anti-interference of optical technology and the industrialization of optical inspection technology for wheat *** studies are of g

关键词： Wheat Quality Optical technology Non-destructive detection

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Rich defects and nanograins boosted formaldehyde sensing performance of mesoporous polycrystalline ZnO nanosheets

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Rare Metals 2022年第7期41卷 2292-2304页

作者： Le-Xi Zhang Ming-Mei Zhao Yan-Yan Yin Yue Xing Li-Jian Bie School of Materials Science and Engineering Tianjin Key Laboratory for Photoelectric Materials and DevicesKey Laboratory of Display Materials and Photoelectric Devices(Ministry of Education)National Demonstration Center for Experimental Function Materials EducationTianjin University of TechnologyTianjin 300384China Department of Environmental Science and Engineering Nankai University Binhai CollegeTianjin 300270China

Comprehensive consideration of structural and electronic sensitization is of significant importance for rational design and assembly of high-performance gas sensors based on metal *** this work,hierarchically mesoporous ZnO nanosheets are synthesized via a hydrothermal method followed by *** characterization reveals polycrystalline feature of these ZnO nanosheets rich in mesopores and *** sensing performance of as-synthesized ZnO nanosheets was sys-tematically investigated,taking formaldehyde as probe *** with commercial ZnO nanoparticles,ZnO nanosheets exhibited enhanced formaldehyde sensing properties,including lower operation temperature,higher sensitivity,faster response,and smaller detection ***,the response(S=227.4)of ZnO nanosheets to 200×10^(-6) formaldehyde is about 17 times larger than that of ZnO nanoparticles(S=13.5).Excluding effects of grain size and surface area,enhanced sensing properties,especially response value,are credited in large part to synergistic actions of surface defects,grain boundaries,as well as unique structural advantage of ZnO ***,this work offers a guideline for boosting performance of metal oxide-based gas sensors via surface defect control and grain boundary construction.

关键词： performance polycrystalline grain

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Coconut oil research:Past,present,and future directions

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Food and Health 2024年第1期6卷 43-52页

作者： Jiao-Jiao Yin He Huang Xiao-Ming Jiang Xing-Yang Guo Bao-Hui Pan Pan Gao Wu Zhong Chuan-Rong Hu Dong-Ping He School of Food Science and Engineering Wuhan Polytechnic UniversityWuhan 430023China key laboratory of Deep Processing of Major grain and Oil Ministry of EducationWuhan 430023China Hubei key laboratory for processing and Transformation of Agricultural Products Wuhan 430023China key laboratory of Edible Oil Quality and Safety for State Market Regulation Wuhan 430023China Wuhan Institute for Food and Cosmetic control Wuhan 430071China

Coconut oil contains a rich amount of medium-chain fatty acids,including lauric acid,decanoic acid,and octanoic acid,as well as the corresponding medium-chain *** possesses functional attributes such as facile digestion and absorption,as well as antibacterial and antioxidant *** study utilized the Citespace and VOSviewer visual analysis software to examine the quantity of published papers,authors,publishing institutions,research hotspots and frontiers of 3442 effective literatures on the theme of"coconut oil"in the Web of Science(WoS)Core Collection *** research on coconut oil can be condensed into four primary sections:(1)investigation and utilization of physiochemical characteristics of coconut oil,(2)analysis of nutritional composition and study of the effectiveness of coconut oil,(3)identification of adulteration in coconut oil,(4)evaluation of the impact of coconut oil as a dietary supplement on animal ***,research focal points have evolved in three distinct *** to 2008,numerous studies were conducted to investigate the precise fatty acid makeup of coconut oil and its potential for lowering cholesterol *** 2009 to 2016,significant emphasis was placed on examining the impact of coconut oil on methane production in *** 2018 to 2023,the main focus will be on investigating how nanoparticles can alter the properties of coconut *** the future,the anticipated research areas of interest are expected to focus on the rapid detection method of coconut oil,the efficacy of coconut oil and the advancement of coconut *** objective of this review is to provide researchers with relevant information about coconut oil,aiming to foster the continued growth of the coconut oil industry.

关键词： coconut oil visualized analysis research hotspots physiochemical properties nutrient composition

Multidirection Update-Based Multiobjective Particle Swarm Optimization for Mixed No-Idle Flow-Shop Scheduling Problem

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Complex System Modeling and Simulation 2021年第3期1卷 176-197页

作者： Wenqiang Zhang Wenlin Hou Chen Li Weidong Yang Mitsuo Gen the College of Information Science and Engineering Henan University of Technologyand also with Henan Key Laboratory of Grain Photoelectric Detection and ControlZhengzhou 450001China the Fuzzy Logic Systems Institute Fukuoka 820-0067Japanand also with Tokyo University of ScienceTokyo 162-8601Japan

The Mixed No-Idle Flow-shop Scheduling Problem(MNIFSP)is an extension of flow-shop scheduling,which has practical significance and application prospects in production *** improve the efficacy of solving the complicated multiobjective MNIFSP,a MultiDirection Update(MDU)based Multiobjective Particle Swarm Optimization(MDU-MoPSO)is proposed in this *** the biobjective optimization problem of the MNIFSP with minimization of makespan and total processing time,the MDU strategy divides particles into three subgroups according to a hybrid selection *** subgroup prefers one convergence *** subgroups are individually close to the two edge areas of the Pareto Front(PF)and serve two objectives,whereas the other one approaches the central area of the PF,preferring the two objectives at the same *** MDU-MoPSO adopts a job sequence representation method and an exchange sequence-based particle update operation,which can better reflect the characteristics of sequence differences among *** MDU-MoPSO updates the particle in multiple directions and interacts in each direction,which speeds up the convergence while maintaining a good distribution *** experimental results and comparison of six classical evolutionary algorithms for various benchmark problems demonstrate the effectiveness of the proposed algorithm.

关键词： multiobjective optimization Particle Swarm Optimization(PSO) Mixed No-Idle Flow-shop Scheduling Problem(MNLFSP) multidirection update