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Boosting solar hydrogen production via electrostatic interaction mediated E.coli-TiO_(2−x)biohybrid system

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Nano Research 2024年第6期17卷 5390-5398页

作者： Xingxing Lv Weicheng Huang Ya Gao Rui Chen Xiaowei Chen Danqing Liu ling weng Liangcan He Shaoqin Liu School of Material Science and Chemical Engineering Harbin University of Science and TechnologyHarbin 150040China School of Medicine and Health and Key Laboratory of Micro-systems and Micro-structures Manufacturing of Ministry of EducationHarbin Institute of TechnologyHarbin 150001China Department of Physics School of ScienceJimei UniversityXiamen 361021China Zhengzhou Research Institute Harbin Institute of TechnologyZhengzhou 450046China

Hydrogen is garnering growing attention as a green energy source with zero carbon emissions.However,most hydrogen production technologies still rely on the consumption of fossil fuels and are therefore unsustainable.This has driven the search for more environmentally friendly methods of hydrogen production.In this work,we present an innovative approach to enhance hydrogen generation via electrostatic interaction in the Escherichia coli and defective titanium dioxide(TiO_(2−x))biohybrids.Our method involves narrowing the forbidden bandwidth of TiO2 while introducing defect bands into its conduction band to facilitate visible light absorption and efficient charge separation.This biohybrid system,consisting of E.coli and TiO_(2−x),demonstrates a remarkable capability to produce 1.25 mmol of hydrogen within a 3-h timeframe under visible light irradiation.This accomplishment signifies a 3.31-fold rise in hydrogen production in comparison to E.coli,signifying a substantial enhancement in hydrogen production efficiency.Furthermore,we delve into the alterations in biological metabolites associated with hydrogen production and the changes in electron transfer in different biohybrid systems.It provides valuable insights into the understanding of the intrinsic mechanisms that drive the process.This work introduces a novel and promising avenue for achieving this exciting goal.

关键词： Escherichia coli TiO_(2−x)nanoparticles biohybrid system hydrogen production

Multi-attribute group decision-making method with linguistic q-rung orthopair fuzzy information based on bi-direction Choquet integral

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International Journal of Intelligent Computing and Cybernetics 2023年第2期16卷 341-363页

作者： ling weng Jian Lin Shujie Lv School of Computer and Information Science Fujian Agriculture and Forestry UniversityFuzhouChina

Purpose-The purpose of this paper is to develop the linguistic q-rung orthopair fuzzy set(LqROFS)information VIKOR method based on the bi-direction Choquet integral(BDCI),taking into account the correlation between information.The method can enrich the existing studies related to LqROFS information and better solve the problem of MAGDM problem.Design/methodology/approach-Since applying Choquet integral(CI)depict information interaction is a common operation in MAGDM.However,the traditional CI has some limitations.The unidirectional alignment may affect the MAGDM results.Therefore,a LqROFS-VIKOR method based on BDCI is proposed,where BDCI is used to aggregate the decision matrix.Furthermore,it is not reasonable to apply exact numbers to express the similarity between two qualitative data.Then a new method of defining similarity using linguistics is proposed.The similarity is used to calculate attribute weights.Findings-The validity and potential application of MAGMD method with linguistic q-rung orthopair fuzzy information based on BDCI are demonstrated in a numerical examples study.Originality/value-According to the study of available literature,the current research on LqROFS is incomplete.The existing studies of both similarity and aggregate operators have certain shortcomings.The definition of similarity proposed in this paper is more in line with reality.And compared with the existing methods,the BDCI-based aggregate operator can describe the interaction between information more reasonably.Based on this VIKOR method based on BDCI under the LqROFS environment can better select the alternative.

关键词： linguistic q-rung orthopair fuzzy set Similarity measure Bi-direction choquet integral VIKOR method

用于纹理识别与重建的铁镓合金触须传感器阵列

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电工技术学报 2024年第4期39卷 966-975页

作者：翁玲罗旭齐芳芳李卓林刘凯乐省部共建电工装备可靠性与智能化国家重点实验室(河北工业大学) 天津300130 河北省电磁场与电器可靠性重点实验室(河北工业大学) 天津300130

受动物触须传感机制的启发,结合铁镓合金(Galfenol)对物体表面纹理高度信息的优良感知能力,设计制作一种铁镓合金触须传感器单元,并将其集成为4×2阵列。基于力学、电磁学理论和压磁方程建立了传感器单元输出电压模型,描述了输出电压与... 详细信息

受动物触须传感机制的启发,结合铁镓合金(Galfenol)对物体表面纹理高度信息的优良感知能力,设计制作一种铁镓合金触须传感器单元,并将其集成为4×2阵列。基于力学、电磁学理论和压磁方程建立了传感器单元输出电压模型,描述了输出电压与物体表面纹理高度的关系。实验测试了传感器单元的静态和动态特性。设计的传感器单元能够检测物体表面0.01~1.6 mm纹理高度变化,灵敏度为243.3 mV/mm,且具有较快的响应时间(26 ms)和恢复时间(25 ms)。将传感器单元与阵列装载在机械手上滑过具有不同纹理的样品表面,利用输出电压波形可识别与重建样品表面纹理。结果表明,设计的传感器阵列能够高精度地感知物体表面纹理信息,进而指导机械手调整操作策略,完善人机交互过程。

关键词：铁镓合金触须传感器纹理识别纹理重建

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磁传感器检测磁性纳米粒子方法研究

传感器与微系统 2024年第3期43卷 22-25,30页

作者：耿跃华王欣瑜翁玲河北工业大学省部共建电工装备可靠性与智能化国家重点实验室天津300130 河北工业大学河北省电磁场与电器可靠性重点实验室天津300130

磁性纳米粒子表面修饰后,可以与核酸、蛋白质、重金属离子等物质结合,通过检测磁粒子的磁响应信号,可以得到待测物的含量。基于电磁学理论与隧道磁阻效应,设计了一种用于检测不同质量磁性纳米粒子磁信号的测试平台。利用COMSOL Multiphy... 详细信息

磁性纳米粒子表面修饰后,可以与核酸、蛋白质、重金属离子等物质结合,通过检测磁粒子的磁响应信号,可以得到待测物的含量。基于电磁学理论与隧道磁阻效应,设计了一种用于检测不同质量磁性纳米粒子磁信号的测试平台。利用COMSOL Multiphysics有限元分析软件优化了磁场产生装置,改进后的线圈在通入直流电流不变的情况下,能将磁场的均匀区域扩大1.5倍,数值提高2 Gs。新型三匝线圈的实验结果与仿真结果相比最大误差为6.25%。选择了适合常规样品的磁场检测装置,分析了各类传感器的最优测量方向,测得了磁粒子质量与输出信号的关系曲线。实验结果表明:随着悬浮液中磁粒子含量的增加,隧道磁阻(TMR)传感器的输出信号也呈上升趋势,两者为线性正比关系。

关键词：定量检测磁性纳米粒子亥姆霍兹线圈隧道磁阻传感器

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含氟基团对聚酰亚胺耐电晕及介电性能的影响

复合材料学报 2024年第5期41卷 2425-2435页

作者：赵伟宋吉祥陈昊林晓艺黄紫微周昱翁凌哈尔滨理工大学材料科学与化学工程学院哈尔滨150040

电气设备的高频化趋势对绝缘材料的耐电晕老化性能及介电性能提出了更高的要求。因此,提高绝缘材料的绝缘性能对高频电力系统的发展至关重要。本文以2,2’-双(三氟甲基)-4,4’-二氨基苯基醚(6FODA)、4,4’-二氨基二苯醚(ODA)、均苯四甲... 详细信息

电气设备的高频化趋势对绝缘材料的耐电晕老化性能及介电性能提出了更高的要求。因此,提高绝缘材料的绝缘性能对高频电力系统的发展至关重要。本文以2,2’-双(三氟甲基)-4,4’-二氨基苯基醚(6FODA)、4,4’-二氨基二苯醚(ODA)、均苯四甲酸二酐(PMDA)为反应单体,设计制备了嵌段共聚型含氟聚酰亚胺(FPI)三层薄膜,并重点研究了材料的耐电晕性能和介电性能。结果表明:不同含氟量嵌段共聚型FPI三层薄膜的耐电晕寿命均高于纯聚酰亚胺(PI)三层薄膜,且随着含氟量的增加,薄膜耐电晕寿命相应增大。当ODA与6FODA摩尔比为1∶9时三层薄膜的耐电晕寿命在常温(20℃)、80 kV/mm下最高可达4.0 h,是纯PI三层薄膜(1.4 h)的2.86倍。随着含氟量的增加,FPI三层薄膜的介电常数呈现先减后增趋势,ODA与6FODA摩尔比为1∶1时三层薄膜的介电常数在1 MHz时最低可降至2.26,介电损耗与电导率呈现先增后减趋势。介电强度随着含氟量的增加有所下降,但均高于纯PI三层薄膜,ODA与6FODA摩尔比为9∶1时,三层薄膜的介电强度高达434 kV/mm。

关键词：绝缘材料含氟聚酰亚胺嵌段共聚三层耐电晕性能介电性能

改性BN-Si-B/环氧树脂复合材料的制备及绝缘性能

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复合材料学报 2024年第5期41卷 2477-2486页

作者：陈昊黄紫微赵伟宋吉祥周昱林晓艺翁凌哈尔滨理工大学材料科学与化学工程学院哈尔滨150040

电晕放电影响电气设备的稳定运行和使用寿命,提高绝缘材料的耐电晕性能对于保证电气设备的正常运行具有重要意义。本文利用硅烷偶联剂改性氮化硼(BN)制备改性BN(fBN),并将其与分散剂(有机硅硼复合氧化物(Si-B))共混对环氧树脂(EP)进行... 详细信息

电晕放电影响电气设备的稳定运行和使用寿命,提高绝缘材料的耐电晕性能对于保证电气设备的正常运行具有重要意义。本文利用硅烷偶联剂改性氮化硼(BN)制备改性BN(fBN),并将其与分散剂(有机硅硼复合氧化物(Si-B))共混对环氧树脂(EP)进行了改性。采用共混法和热固法制备了不同fBN含量的f BN-Si-B/EP复合材料,提高了环氧树脂的耐电晕寿命。实验结果表明:在30℃和30 kV·mm^(-1)电场强度下,f BN-Si-B/EP复合材料的耐电晕寿命最高可达114.8 h,是纯环氧树脂5.01倍。随着fBN掺杂量的增加,fBNSi-B/EP复合材料的介电常数呈现增加的趋势。同时,该复合材料的体积电阻率和击穿场强则表现出先降低后增加的趋势。少量fBN的加入可以降低复合材料的相对介电常数,抑制介电损耗增加。虽然fBN-Si-B/EP复合材料的击穿场强和体积电阻率略微降低,体积电阻率极小值为6.65×10^(14)Ω·cm,击穿场强极小值为24.04 kV·mm^(-1),但仍具有较好的绝缘性能。

关键词：耐电晕寿命介电性能环氧树脂氮化硼复合材料

Magneto-thermo-mechanical characterization of giant magnetostrictive materials

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Rare Metals 2013年第5期32卷 486-489页

作者： Li Wang Bo-Wen Wang Zhi-Hua Wang ling weng Wen-Mei Huang Yan Zhou Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability Hebei University of Technology International Center for Materials Physics The Chinese Academy of Sciences School of Science Tianjin University of Commerce

The variations of magnetization and magneto- striction with temperature and stress were investigated through the analysis of the effective field, induced by temperature and stress. A nonlinear magnetostrictive model of giant magnetostrictive materials was proposed. The proposed model can be used to calculate the magnetostrictive characterization of giant magnetostrictive materi- als in different temperatures and under different stresses. The coupling effects of axial stress, magnetic field, and temperature on the magnetostriction of a Terfenol-D rod were numerically simulated as well as experimentally tested. Comparison between the calculating and experimental results shows that the proposed model can better describe the magneto-thermo-mechanical characteristics of Terfenol-D rod under different temperatures and compressive stress. Therefore, the proposed model possesses an important significance for the design of magnetostrictive devices.

关键词： Nonlinear model Giant magnetostrictivematerials Temperature Stress

不同干燥方式对低盐腌制鲍鱼复水及品质特性的影响

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食品工业科技 2024年第10期45卷 57-65页

作者：王舒娴杜瀚林端权翁凌曹敏杰孙乐常集美大学海洋食品与生物工程学院福建厦门361021 爱尔兰农业部农业与食品发展局Teagasc食品研究中心爱尔兰科克999014 水产品深加工技术国家地方联合工程中心福建厦门361021 海洋食品精深加工关键技术省部共建协同创新中心大连工业大学辽宁大连116034

为研究不同干燥方式对低盐腌制鲍鱼复水品质的影响,本研究采用真空冷冻干燥、冷风干燥与热风干燥对其进行干燥处理,研究其复水过程的质量体积和复水率,并通过低场核磁共振(low field nuclear magnetic resonance,LF-NMR)和磁共振成像(ma... 详细信息

为研究不同干燥方式对低盐腌制鲍鱼复水品质的影响,本研究采用真空冷冻干燥、冷风干燥与热风干燥对其进行干燥处理,研究其复水过程的质量体积和复水率,并通过低场核磁共振(low field nuclear magnetic resonance,LF-NMR)和磁共振成像(magnetic resonance imaging,MRI)研究复水过程的水分分布以及复水后的色差、质构、组织形态、游离氨基酸等变化情况。结果表明,在72 h时真空冷冻干鲍的复水率为278.73%,显著高于冷风干鲍和热风干鲍的复水率(P<0.05)。由LF-NMR和MRI结果分析得出,不易流动水和自由水含量是三种干鲍水分含量增加的主要因素。真空冷冻干鲍、冷风干燥和热风干鲍分别在72、48和24 h时复水完成。不同的干燥方式影响复水后的质构,结果显示,三种干燥方式的鲍鱼样品硬度与咀嚼性均有显著差异(P<0.05),真空冷冻干燥鲍鱼复水后硬度和咀嚼性最低,分别为954.01和708.59 g;热风干燥鲍鱼复水后硬度与咀嚼性最高,分别为1230.14和920.02 g。组织学染色与扫描电镜结果显示,真空冷冻干鲍的肌肉组织为较疏松的多孔结构;冷风干鲍和热风干鲍的组织为较细长和致密的结构。综上,真空冷冻干燥鲍鱼的复水率最高,硬度和咀嚼性最低,口感最好,但滋味不及热风干燥鲍鱼。本研究结果可为了解不同干燥方法对低盐腌制鲍鱼产品品质的影响提供理论参考。

关键词：鲍鱼复水品质特性干燥方式

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In situ anchor of magnetic Fe304 nanoparticles onto natural maifanite as efficient heterogeneous Fenton-like catalyst

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Frontiers of Materials Science 2016年第3期10卷 300-309页

作者： Hang ZHAO ling weng Wei-Wei CUI Xiao-Rui ZHANG Huan-Yan XU Li-Zhu LIU School of Materials Science and Engineering Harbin University of Science and Technology Harbin 150040 China

In situ anchor of magnetic Fe304 nanoparticles （NPs） onto the surface of natural maifanite was realized by chemical oxidation coprecipitation in hot alkaline solution. The Fe304/maifanite composites were characterized by XRD, FTIR, SEM, and TEM. These results indicated that polycrystalline Fe304 NPs with inverse spinel structure were formed and tightly dispersed on maifanite surface. Based on the measurement of surface Zeta potential of maifanite at different medium pHs, the possible combination mechanism between natural maifanite and Fe304 NPs was proposed. Then, the as- obtained composites were developed as highly efficient heterogeneous Fenton-like catalyst for the discoloration of an azo dye, Methyl Orange （MO）. The comparative tests on MO discoloration in different systems revealed that Fe304/maifanite composite exhibited much higher Fenton-like catalytic activity than Fe304 NPs and the heterogeneous Fenton- like reaction governed the discoloration of MO. Kinetic results clearly showed that MO discoloration process followed the second-order kinetic model. Fe304/maifanite compo- sites exhibited the typical ferromagnetic property detected by VSM and could be easily separated from solution by an external magnetic field.

关键词： maifanite Fe304 NPs mechanism Fenton-like catalyst Methyl Orange （MO）