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Natural high-porous diatomaceous-earth based self-floating aerogel for efficient solar steam power generation

Green Energy & Environment 2024年第2期9卷 378-389页

作者： Aitang Zhang Kai Wang Md Julker Nine Mengyu Cao Hanwen Zong Zhiqiang Liu Hanwen Guo Jingquan Liu Dusan Losic College of Materials Science and Engineering Institute for Graphene Applied Technology InnovationCollaborative Innovation Center for Marine Biomass Fibers Materials and Textiles of Shandong ProvinceQingdao UniversityQingdao266071China The University of Adelaide School of Chemical Engineering and Advanced MaterialsARC Graphene Research HubNorth Engineering BuildingN206 AdelaideSA 5005Australia

The application of solar steam generation in seawater desalination is an effective way to solve the shortage of fresh water *** present,many kinds of photothermal conversion materials have been developed and used as evaporators in seawater ***,some evaporators need additional thermal insulation or water supply devices to achieve efficient photothermal *** addition,their complex,time consuming and no scalable preparation process,high cost of raw materials and poor salt resistance hinder the practical application of these *** to its distinctive nanoporous structure,diatomite as fossilized single-cells algae diatoms is a promising natural silica-based material for seawater *** are taken from sea and that makes true sense to use them in the ***,we report the first example of synthesis robust three-dimensional(3D)natural-diatomite composite by assembling polyaniline nanoparticles covered diatomite into the polyvinyl alcohol pre-treated melamine foam frameworks and demonstrate its application as new evaporator for seawater *** porous framework does not only improve the sunlight scattering efficiency,but also offer large network of channels for water *** inherent mechanism behind salt desalination process involves the absorption of water molecules on the surface of the internal silica micro-nano pores,and evaporation under the heat induced by the polyaniline absorbed ***,the metal ions are segregated by many available pores and channels to achieve the self-desalting *** developed evaporator possesses the superiority of multi-stage pore structure,strong hydrophilicity,low thermal conductivity,excellent light absorption,fast water transportation and salt-resistant crystallization as well as good *** evaporation rate without an additional device is found to be 1.689 kg m^(-2)h^(-1)under 1-Sun irradiation,and the energy conversion efficiency is as

关键词： Diatomite Micro/nanopores Polyaniline Three-dimensional composite Solar steam generation

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基于聚吡咯/蛭石/海藻纤维复合半导体材料的瞬态压阻传感器

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Science China Materials 2024年第2期67卷 580-587页

作者：王鹏真梁俊轩田维亮张克伟夏延致 State Key Laboratory of Bio-fibers and Eco-Textiles Collaborative Innovation Center for Marine Biomass FibersMaterials and Textiles of Shandong ProvinceCollege of Materials Science and EngineeringInstitute of Marine Biobased MaterialsQingdao UniversityQingdao 266071China Key Laboratory of Chemical Engineering in South Xinjiang College of Chemistry and Chemical EngineeringTarim UniversityAlaer 843300China

电子皮肤、人机交互和健康监测等领域推动了柔性压力传感器的快速发展.然而,同时满足耐用和瞬态的需求对柔性压力传感器是一个巨大的挑战.本文开发了一种用于柔性瞬态压阻传感器的安全、耐受的聚吡咯/蛭石/海藻酸盐半导体框架.将带负电... 详细信息

电子皮肤、人机交互和健康监测等领域推动了柔性压力传感器的快速发展.然而,同时满足耐用和瞬态的需求对柔性压力传感器是一个巨大的挑战.本文开发了一种用于柔性瞬态压阻传感器的安全、耐受的聚吡咯/蛭石/海藻酸盐半导体框架.将带负电荷的蛭石纳米片插层到可生物降解的海藻酸盐织物中,进一步用高灵敏度的导电聚吡咯修饰.由此产生的多维框架实现了柔性传感器的稳定性,并且在使用寿命结束后可以在不留下电子垃圾的情况下逐渐降解.所获得的瞬态压阻传感器显示出了快速的响应时间(81/99 ms)和出色的抗疲劳性能.此外,我们开发了一种有效的机器学习模型用于人体动作识别和预测,准确率为100%.本工作为柔性瞬态电子学中有机-无机界面的设计提供了一种有前景的策略,并在基于舒适生物纤维的柔性平台中展现了广阔的应用前景.

关键词： piezoresistive sensors transient electronics machine learning tolerable hybrids

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Interfacial energy barrier tuning of hierarchical Bi_(2)O_(3)/WO_(3) heterojunctions for advanced triethylamine sensor

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Journal of Advanced Ceramics 2022年第12期11卷 1860-1872页

作者： Mingxin ZHANG Kai LIU Xingmin ZHANG Bingbing WANG Xinru XU Xinxin DU Chao YANG Kewei ZHANG College of Materials Science and Engineering State Key Laboratory of Bio-Fibers and Eco-TextilesCollaborative Innovation Center for Marine Biomass FibersMaterials and Textiles of Shandong ProvinceQingdao UniversityQingdao 266071China

Traditional triethylamine(TEA)sensors suffer from the drawback of serious cross-sensitivity due to the low charge-transfer ability of gas-sensing ***,an advanced anti-interference TEA sensor is designed by utilizing interfacial energy barriers of hierarchical Bi_(2)O_(3)/WO_(3) *** from abundant slit-like pores,desirable defect features,and amplification effect of heterojunctions,the sensor based on Bi_(2)O_(3)/WO_(3) composite with 40%Bi_(2)O_(3)(0.4-Bi_(2)O_(3)/WO_(3))demonstrates remarkable performance in terms of faster response/recovery time(1.7-fold/1.2-fold),higher response(2.1-fold),and lower power consumption(30℃-decrement)as compared with the pristine WO_(3) ***,the composite sensor exhibits long-term stability,reproducibility,and negligible response towards interfering molecules,indicating the promising potential of Bi_(2)O_(3)/WO_(3) heterojunctions in anti-interference detection of low-concentration TEA in real *** work not only offers a rational solution to design advanced gas sensors by tuning the interfacial energy barriers of heterojunctions,but also provides a fundamental understanding of hierarchical Bi_(2)O_(3) structures in the gas-sensing field.

关键词： Bi_(2)O_(3)/WO_(3) heterojunctions hierarchical structures triethylamine(TEA) gas sensors

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Zinc-catecholete frameworks biomimetically grown on marine polysaccharide microfibers for soft electronic platform

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Nano Research 2023年第1期16卷 1296-1303页

作者： Kai Liu Mingxin Zhang Xinxin Du Anqin Zhou Bin Hui Yanzhi Xia Kewei Zhang State Key Laboratory of Bio-fibers and Eco-Textiles Collaborative Innovation Center for Marine Biomass FibersMaterials and Textiles of Shandong ProvinceCollege of Materials Science and EngineeringInstitute of Marine Biobased MaterialsQingdao UniversityQingdao 266071China

Integrating functional nanomaterials on nonplanar organisms has emerged as a rising technology,while significant mismatch would cause interface failure and poor ***,we demonstrate a facile strategy to assemble crystalline catecholate frameworks with honeycomb lattice on seaweed-derived polysaccharide microfibers,which is expected to form biomimetic connections and maintain durable *** physiological coagulation,well-aligned ZnO nanoarrays are tightly attached on alginate fibers,which is fractionally adopted as sacrifice for heteroepitaxial growth of zinc-catecholate frameworks(Zn3(HHTP)2).Benefiting from amplification effect of in-situ formed heterojunctions,promoted interfacial charge transfer is achieved,which allows for fabricating broadband *** with high porosity for gas adsorption,the heteroepitaxial catecholate framework further enables its use as highly selective ppb-level triethylamine *** work provides a promising strategy for heteroepitaxial growth of catecholate frameworks on organo-substrates and opens new applications in wearable sensor platform based on comfortable biofibers.

关键词： metal-organic frameworks epitaxial growth heterostructures sensors biofibers

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Fabrication and formation mechanism of closed-loop fibers by electrospinning with a tip collector

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Chinese Physics B 2016年第7期25卷 505-508页

作者：闫旭于淼韩文鹏犹明浩张君诚董瑞华张红娣龙云泽 collaborative innovation center for Low-Dimensional Nanomaterials & Optoelectronic Devices College of PhysicsQingdao University Department of Mechanical Engineering Columbia University collaborative innovation center for Marine biomass fibers Materials and Textiles of Shandong ProvinceState Key Laboratory Cultivation Base of New Fiber Materials and Modern Textile Qingdao University

Electrospun nanofibers with designed or controlled structures have drawn much attention. In this study, we report an interesting new closed-loop structure in individual cerium nitrate/polyvinyl alcohol（Ce（NO3）3/PVA） and Na Cl/PVA fibers,which are fabricated by electrospinning with a nail collector. The electrospinning parameters such as voltage and Ce（NO3）3（or Na Cl） concentration are examined for the formation of the closed-loop structure. The results suggest that the increase of the spinning voltage or addition of Ce（NO3）3（or Na Cl） is favorable for the formation of the closed-loop structure, and the increase of loop numbers and the decrease of loop size. Further analyses indicate that the formation mechanism of the closed-loop fibers can be predominantly attributed to the Coulomb repulsion in the charged jets.

关键词： electrospinning nail collector closed-loop fiber Coulomb repulsion

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Detection of dopamine using self-assembled diazoresin/single-walled carbon nanotube modified electrodes

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Chinese Chemical Letters 2014年第4期25卷 523-528页

作者： Bing Yu Hua Yuan Yi-Ying Yang Hai-Lin Cong Tian-Zi Hao Xiao-Dan Xu Xiu-Lan Zhang Shu-Jing Yang Li-Xin Zhang Laboratory for New Fiber Materials and Modern Textile Growing Base for State Key LaboratoryCollege of Chemical EngineeringQingdao University collaborative innovation center for Marine biomass fibers Materials and Textiles of Shandong ProvinceQingdao University

Ultrathin films of diazoresin （DR）/single-walled carbon nanotube （SWNT） were fabricated on thioglycollic acid （TGA） decorated gold （Au） electrodes by the self-assembly method combined with the photocrosslinking technique. The electrochemical behavior of dopamine （DA） at the DR/SWNT modified electrodes was studied using the cyclic voltammetry （CV） and differential pulse voltammetry （DPV） methods. Under the optimal conditions, a linear CV response to DA concentration from 1 p, mol/L to 40 μmol/L was observed, and the detection limit of DA was 2.1 ×10-3 μmol/L via the DPV method in the presence of 10μmol/L of uric acid （UA） or 2.5 × 10-3 μmol/L via the DPV method in the presence of 10 μmol/L of ascorbic acid （AA）. Moreover, the modified electrodes exhibited good reproducibility and sensitivity, demonstratinz its feasibilitv for analytical ourooses.

关键词： Self-assembly Single-walled carbon nanotube Diazoresin Dopamine Cyclic voltammetry

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Preparation, Structure and Performances of Cross-Linked Regenerated Cellulose fibers

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Wuhan University Journal of Natural Sciences 2019年第1期24卷 1-7页

作者： LIU Jie WANG Huaifang ZHANG Lin SUI Shuying ZHANG Rui DONG Chaohong LIU Yun ZHU Ping College of Textiles & Clothing/Institute of Functional Textiles and Advanced Materials/State Key Laboratory of Bio-fibers and Eco-Textiles Qingdao University collaborative innovation center of Marine biomass fibers Materials and Textiles of Shandong Province

Cross-linked regenerated cellulose fibers(CRCFs) were prepared by wet spinning firstly and then treated by high temperature curing. Cellulose dissolved in ionic liquid together with wrinkle proofing agent and cross-linking agent was employed as spinning solution. The properties and structure of CRCFs were investigated. Fourier transform infrared(FT-IR) spectroscopy and X-ray diffraction(XRD) analysis show that CRCFs were prepared successfully and the crystal form of the fibers remained the same before and after cross-linking. The results indicate that CRCFs prepared in this study possess more excellent wrinkle recovery ability and wash durability than those treated by finishing process.

关键词： cellulose wet spinning cross-linking wrinkle recovery mechanical properties wash durability

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Self-assembly of carbon nanomaterials onto carbon fiber to improve the interfacial properties of epoxy composites

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Journal of Materials Science & Technology 2023年第30期161卷 44-49页

作者： Hao Yan Dongqi Hu Yifeng Dai Xiaoyu Zhang Hua Yuan Weidi Li Xiaoyu Huang Yeqiang Tan collaborative innovation center for Marine biomass fibers College of Materials Science and EngineeringQingdao UniversityQingdao 266071China School of Environmental and Material Engineering Yantai UniversityYantai 264005China Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing Yantai 265503China

The interfacial property of carbon fiber(CF)reinforced composites is crucial to facilitate the application of high-strength *** the electrostatic and hydrogen bond properties of diazo resin,carbon nanotubes(CNTs)and graphene oxide(GO)could be quickly grafted onto the surface of the CF via the layer-by-layer self-assembly *** results showed that CNTs and GO were uniformly coated onto the CF surface,and the chemical activity and roughness of the modified CF surface were improved *** modified CF surface can significantly augment the interaction between the epoxy resin and the ***,due to the good interfacial property,the impact performance of the composites re-inforced with the nanomaterial-modified CF was improved *** addition,the interface properties of the composites are studied in *** method is expected to achieve rapid surface modification of carbon fiber.

关键词： Carbon fiber Carbon nanotube Graphene oxide Interfacial properties

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Ultrafine polycrystalline titania nanofibers for superior sodium storage

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Journal of Energy Chemistry 2019年第11期28卷 153-161页

作者： Zhidan Diao Daming Zhao Chunxiao Lv Hongli Liu Dongjiang Yang Shaohua Shen International Research center for Renewable Energy State Key Laboratory of Multiphase Flow in Power EngineeringXi’an Jiaotong UniversityXi’an 710049ShaanxiChina School of Environmental Science and Engineering Collaborative Innovation Centerfor Marine Biomass FibersMaterials and Textiles of Shandong ProvinceQingdao UniversityQingdao 266071ShandongChina

Sodium ion batteries have a huge potential for large-scale energy storage for the low cost and abundance of sodium resources. In this work, a novel structure of ultrafine polycrystalline TiO2 nanofibers is prepared on nickel foam/carbon cloth by a simple vapor deposition method. The as-prepared TiO2 nanofibers show excellent performance when used as anodes for sodium-ion batteries. Specifically, the TiO2 nanofibers@nickel foam electrode delivers a high reversible capacity of 263.2 m Ahg^-1 at 0.2 C and maintains a considerable capacity of 144.2 m Ahg^-1 at 10 C. The TiO2 nanofibers@carbon cloth electrode also shows excellent high-rate capability, sustaining a capacity of 148 m Ahg^-1 after 20 0 0 cycles at 10 C. It is believed that the novel nanofibrous structure increases the contact area with the electrolyte and greatly shortens the sodium ion diffusion distance, and meanwhile, the polycrystalline nature of nanofibers exposes more intercalation sites for sodium storage. Furthermore, the density functional theory calculations exhibit strong ionic interactions between the exposed TiO2(101) facets and sodium ions, leading to a preferable sodiation/desodiation process. The unique structural features endow the TiO2 nanofibers electrodes great advantages in rapid sodium storage with an outstanding high-rate capability.

关键词： Polycrystalline titania Nanofibers Sodium storage High-rate capability

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CoFe_2O_4/carbon nanotube aerogels as high performance anodes for lithium ion batteries

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Green Energy & Environment 2017年第2期2卷 160-167页

作者： Xin Sun Xiaoyi Zhu Xianfeng Yang Jin Sun Yanzhi Xia Dongjiang Yang School of Environmental Science and Engineering Collaborative Innovation Center for Marine Biomass Fibers Materials and Textiles of Shandong ProvinceCollege of Automation and Electrical Engineering Qingdao University Analytical and Testing Centre South China University of Technology Queensland Micro- and Nanotechnology Centre (QMNC) Griffith University

High-performance lithium ion batteries(LIBs) require electrode material to have an ideal electrode construction which provides fast ion transport, short solid-state ion diffusion, large surface area, and high electric conductivity. Herein, highly porous three-dimensional(3D)aerogels composed of cobalt ferrite(CoFe_2O_4, CFO) nanoparticles(NPs) and carbon nanotubes(CNTs) are prepared using sustainable alginate as the precursor. The key feature of this work is that by using the characteristic egg-box structure of the alginate, metal cations such as Co^(2+)and Fe^(3+) can be easily chelated via an ion-exchange process, thus binary CFO are expected to be prepared. In the hybrid aerogels, CFO NPs interconnected by the CNTs are embedded in carbon aerogel matrix, forming the 3D network which can provide high surface area, buffer the volume expansion and offer efficient ion and electron transport pathways for achieving high performance LIBs. The as-prepared hybrid aerogels with the optimum CNT content(20 wt%) delivers excellent electrochemical properties, i.e., reversible capacity of 1033 mAh g^(-1) at 0.1 A g^(-1) and a high specific capacity of 874 mAh g^(-1) after 160 cycles at 1 A g^(-1). This work provides a facile and low cost route to fabricate high performance anodes for LIBs.

关键词： Alginate Aerogels Cobalt ferrite Anode Lithium-ion battery

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