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2D Nanomaterials for Effective Energy Scavenging

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Nano-Micro Letters 2021年第5期13卷 151-191页

作者： Md Al Mahadi Hasan Yuanhao Wang chris R.bowen Ya Yang CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro‑Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083People’s Republic of China SUSTech Engineering Innovation Center School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhenGuangdong 518055People’s Republic of China Department of Mechanical Engineering University of BathBath BA27AKUK School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049People’s Republic of China Center on Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanning 530004People’s Republic of China

The development of a nation is deeply related to its energy consumption.2D nanomaterials have become a spotlight for energy harvesting applications from the small-scale of low-power electronics to a large-scale for industry-level applications,such as self-powered sensor devices,environmental monitoring,and large-scale power *** from around the world are working to utilize their engrossing properties to overcome the challenges in material selection and fabrication technologies for compact energy scavenging devices to replace batteries and traditional power *** this review,the variety of techniques for scavenging energies from sustainable sources such as solar,air,waste heat,and surrounding mechanical forces are discussed that exploit the fascinating properties of 2D *** addition,practical applications of these fabricated power generating devices and their performance as an alternative to conventional power supplies are discussed with the future pertinence to solve the energy problems in various fields and applications.

关键词： 2D nanomaterials Solar energy Tribo-/piezo-/thermo-/pyro-electricity Osmotic power generation Self-powered sensor

Piezoelectric Materials for Controlling Electro-Chemical Processes

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Nano-Micro Letters 2020年第11期12卷 51-89页

作者： Weiqi Qian Weiyou Yang Yan Zhang chris R.bowen Ya Yang CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro‑nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083People’s Republic of China Institute of Materials Ningbo University of TechnologyNingbo 315211People’s Republic of China Department of Mechanical Engineering University of BathBath BA27AKUK School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049People’s Republic of China Center on Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanning 530004People’s Republic of China

Piezoelectric materials have been analyzed for over 100 years,due to their ability to convert mechanical vibrations into electric charge or electric fields into a mechanical strain for sensor,energy harvesting,and actuator applications.A more recent development is the coupling of piezoelectricity and electro-chemistry,termed piezo-electro-chemistry,whereby the piezoelectrically induced electric charge or voltage under a mechanical stress can influence electro-chemical *** is growing interest in such coupled systems,with a corresponding growth in the number of associated publications and *** review focuses on recent development of the piezo-electro-chemical coupling multiple systems based on various piezoelectric *** provides an overview of the basic characteristics of piezoelectric materials and comparison of operating conditions and their overall electro-chemical *** reported piezo-electro-chemical mechanisms are examined in *** are made between the ranges of material morphologies employed,and typical operating conditions are *** addition,potential future directions and applications for the development of piezo-electro-chemical hybrid systems are *** review provides a comprehensive overview of recent studies on how piezoelectric materials and devices have been applied to control electro-chemical processes,with an aim to inspire and direct future efforts in this emerging research field.

关键词： Piezoelectric materials Piezoelectric effect Electro-chemistry Piezo-electro-chemistry

Improved photocatalytic performance of gradient reduced TiO2 ceramics with aligned pore channels

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Advanced Powder Materials

Advanced Powder Materials 2022年第3期1卷 27-34页

作者： Hanyu Gong Lu Wang Kechao Zhou Dou Zhang Yan Zhang Vana Adamaki Aleksandrs Sergejevs chris bowen State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China Department of Mechanical Engineering University of BathBA27AYUK Electronic and Electrical Engineering Department University of BathBA27AYUK

Magn-eli,a fascinating sub-stoichiometric titanium oxide phase that contains oxygen vacancies of TiO_(2),is proposed as a potential photo-electrode for photocatalysis due to its high conductivity and photoelectric conversion *** this work,partially reduced porous TiO_(2) ceramics with a graded reduction profile and an aligned pore structure were prepared by carbo-thermal reduction of freeze-cast TiO_(2) with a range of porosities from 10 to 30 vol.%.AC conductivity evaluation revealed that the oxygen vacancies that exist in Magn-eli lead to a relatively high AC conductivity of~10 S/m at 1 kHz,as compared to that of the stoichiometric porous TiO_(2).A maximum photocurrent density and incident photon-to-current efficiency(IPCE)of 9.14 mA/cm^(2) and 40.52%respectively were achieved from the gradient porous Magn-eli with a porosity of 30 vol.%.

关键词： TiO_(2)ceramics Magneli Photocatalysis Aligned pore

Coupling Enhancement of a Flexible BiFeO_(3) Film-Based Nanogenerator for Simultaneously Scavenging Light and Vibration Energies

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Nano-Micro Letters 2022年第12期14卷 137-150页

作者： Xiao Han Yun Ji Li Wu Yanlong Xia chris Rbowen Ya Yang CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400People’s Republic of China Department of Mechanical Engineering University of BathBath BA27AKUK School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049People’s Republic of China Center On Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanning 530004People’s Republic of China

Coupled nanogenerators have been a research hotspot due to their ability to harvest a variety of forms of energy such as light,mechanical and thermal energy and achieve a stable direct current *** films are frequently investigated for photovoltaic applications due to their unique photovoltaic properties and bandgap-independent photovoltage,while the flexoelectric effect is an electromechanical property commonly found in solid ***,we effectively construct a new form of coupled nanogenerator based on a flexible BiFeO_(3) ferroelectric film that combines both flexoelectric and photovoltaic effects to successfully harvest both light and vibration *** device converts an alternating current into a direct current and achieves a 6.2% charge enhancement and a 19.3%energy enhancement to achieve a multi-dimensional"1+1>2"coupling enhancement in terms of current,charge and *** work proposes a new approach to the coupling of multiple energy harvesting mechanisms in ferroelectric nanogenerators and provides a new strategy to enhance the transduction efficiency of flexible functional devices.

关键词： Ferroelectric film Coupled nanogenerators Photovoltaic effect Flexoelectric effect Energy collection

Differences and Similarities of Photocatalysis and Electrocatalysis in Two-Dimensional Nanomaterials:Strategies,Traps,Applications and Challenges

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Nano-Micro Letters 2021年第10期13卷 214-251页

作者： Weiqi Qian Suwen Xu Xiaoming Zhang Chuanbo Li Weiyou Yang chris Rbowen Ya Yang Beijing Key Laboratory of Micro-Nano Energy and Sensor CAS Center for Excellence in NanoscienceBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400People’s Republic of China Optoelectronics Research Center School of ScienceCollege of Life and Environmental SciencesMinzu University of ChinaBeijing 100081People’s Republic of China Institute of Materials Ningbo University of TechnologyNingbo 315016People’s Republic of China Department of Mechanical Engineering University of BathBath BA27AKUK School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049People’s Republic of China Center on Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanning 530004People’s Republic of China

Photocatalysis and electrocatalysis have been essential parts of electrochemical processes for over half a *** progress in the controllable synthesis of 2D nanomaterials has exhibited enhanced catalytic performance compared to bulk *** has led to significant interest in the exploitation of 2D nanomaterials for *** have been a variety of excellent reviews on 2D nanomaterials for catalysis,but related issues of differences and similarities between photocatalysis and electrocatalysis in 2D nanomaterials are still ***,we provide a comprehensive overview on the differences and similarities of photocatalysis and electrocatalysis in the latest 2D *** and traps for performance enhancement of 2D nanocatalysts are highlighted,which point out the differences and similarities of series issues for photocatalysis and *** addition,2D nanocatalysts and their catalytic applications are ***,opportunities,challenges and development directions for 2D nanocatalysts are *** intention of this review is to inspire and direct interest in this research realm for the creation of future 2D nanomaterials for photocatalysis and electrocatalysis.

关键词： 2D nanomaterials Photocatalysis Electrocatalysis Electrochemistry Photoelectrochemistry

Ferroelectric catalytic BaTiO_(3)-based composite insoles to promote healing of infected wounds:Analysis of antibacterial efficacy and angiogenesis

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Interdisciplinary Materials 2024年第5期3卷 757-774页

作者： Qiong Liu Xudan Liu Linfeng Fan Xinna Bai Hao Pan Hang Luo Dou Zhang Haitao Huang chris R.bowen State Key Laboratory of Powder Metallurgy Central South UniversityChangshaHunanChina Department of Applied Physics The Hong Kong Polytechnic UniversityHong KongChina Department of Periodontics Hunan Key Laboratory of Oral Health Research&Hunan 3D Printing Engineering Research Center of Oral Care&Hunan Clinical Research Center of Oral Major Diseases and Oral Health&Xiangya Stomatological Hospital&Xiangya School of StomatologyCentral South UniversityChangshaHunanChina Department of Mechanical Engineering University of BathBathUK

Our feet are often subjected to moist and warm environments,which can promote the growth of harmful bacteria and the development of severe infection in wounds located in the *** a result,there is a need for new and innovative strategies to safely sterilize feet,when shoes are worn,to prevent any potential foot-related *** this paper,we have produced a non-destructive,biocompatible and convenient-to-use insole by embedding a BaTiO_(3)(BT)ferroel ectric material into a conventional polydimethylsilane(PDMS)insole material to exploit a ferroelectric catalytic effect to promote the antibacterial and healing of infected wounds via the ferroelectric charges generated during *** formation of reactive oxygen species generated through a ferroelectric catalytic effect in the PDMS-BT composite is shown to increase the oxidative stress on bacteria and decrease both the activity of bacteria and the rate of formation of bacterial *** addition,the ferroelectric field generated by the PDMS-BT insole can enhance the level of transforming growth factor-beta and CD31 by influencing the endogenous electric field of a wound,thereby promoting the proliferation,differentiation of fibroblasts and *** work therefore provides a new route for antimicrobial and tissue reconstruction by integrating a ferroelectric biomaterial into a shoe insole,with significant potential for health-related applications.

关键词： ferroelectric filed effect PDMS-BaTiO3 insole piezo-catalysis wound healing

Di erences and Similarities of Photocatalysis and Electrocatalysis in Two-Dimensional Nanomaterials: Strategies, Traps, Applications and Challenges

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Nano-Micro Letters 2021年第10期13卷 220-257页

作者： Weiqi Qian Suwen Xu Xiaoming Zhang Chuanbo Li Weiyou Yang chris R.bowen Ya Yang Beijing Key Laboratory of Micro-Nano Energy and Sensor CAS Center for Excellence in NanoscienceBeijing Institute of Nanoenergy and NanosystemsChinese Academy of Sciences School of Nanoscience and Technology University of Chinese Academy of Sciences Optoelectronics Research Center School of ScienceCollege of Life and Environmental SciencesMinzu University of China Institute of Materials Ningbo University of Technology Department of Mechanical Engineering University of Bath Center on Nanoenergy Research School of Physical Science and TechnologyGuangxi University

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Air-condition process for scalable fabrication of CdS/ZnS 1D/2D heterojunctions toward efficient and stable photocatalytic hydrogen production

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Carbon Energy 2023年第7期5卷 1-14页

作者： Dongdong Zhang Jie Teng Hongli Yang Zhi Fang Kai Song Lin Wang Huilin Hou Xianlu Lu chris Rbowen Weiyou Yang College of Materials Science and Engineering Hunan UniversityChangshaPeople's Republic of China Institute of Micro/Nano Materials and Devices Ningbo University of TechnologyNingboZhejiangPeople's Republic of China Department of Mechanical Engineering University of BathBathUK

We report the scalable fabrication of CdS/ZnS 1D/2D heterojunctions under ambient air conditions(i.e.,room temperature and atmospheric pressure)in which ZnS nanoparticles are anchored on the surface of CdS *** as-formed heterojunctions exhibit a significantly enhanced photocatalytic H_(2) evolution rate of 14.02 mmol h^(-1) g^(-1) when irradiated with visible light,which is~10 and 85 times higher than those of pristine CdS nanosheets and CdS nanoparticles,respectively,and superior to most of the CdS-based photocatalysts reported to ***,they provide robust photocatalytic performance with demonstratable stability over 58 h,indicating their potential for practical *** formation of 1D/2D heterojunctions not only provides improved exposed active sites that respond to illumination but also provides a rapid pathway to generate photogenerated carriers for efficient separation and transfer through the matrix of single-crystalline CdS *** addition,first-principles simulations demonstrate that the existence of rich Zn vacancies increases the energy level of the ZnS valence band maximum to construct type-II and Z-scheme mixed heterojunctions,which plays a critical role in suppressing the recombination of carriers with limited photocorrosion of CdS to enhance photocatalytic behavior.

关键词： air condition CdS heterojunctions photocatalytic hydrogen production ZnS

Intelligent Recognition Using Ultralight Multifunctional Nano‑Layered Carbon Aerogel Sensors with Human‑Like Tactile Perception

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Nano-Micro Letters 2024年第1期16卷 172-186页

作者： Huiqi Zhao Yizheng Zhang Lei Han Weiqi Qian Jiabin Wang Heting Wu Jingchen Li Yuan Dai Zhengyou Zhang chris Rbowen Ya Yang CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro‑Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400People’s Republic of China Tencent Robotics X Shenzhen 518054People’s Republic of China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049People’s Republic of China Department of Mechanical Engineering University of BathBath BA27AKUK Center on Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanning 530004People’s Republic of China

Humans can perceive our complex world through multi-sensory *** limited visual conditions,people can sense a variety of tactile signals to identify objects accurately and ***,replicating this unique capability in robots remains a significant ***,we present a new form of ultralight multifunctional tactile nano-layered carbon aerogel sensor that provides pressure,temperature,material recognition and 3D location capabilities,which is combined with multimodal supervised learning algorithms for object *** sensor exhibits human-like pressure(0.04–100 kPa)and temperature(21.5–66.2℃)detection,millisecond response times(11 ms),a pressure sensitivity of 92.22 kPa^(−1)and triboelectric durability of over 6000 *** devised algorithm has universality and can accommodate a range of application *** tactile system can identify common foods in a kitchen scene with 94.63%accuracy and explore the topographic and geomorphic features of a Mars scene with 100%*** sensing approach empowers robots with versatile tactile perception to advance future society toward heightened sensing,recognition and intelligence.

关键词： Multifunctional sensor Tactile perception Multimodal machine learning algorithms Universal tactile system Intelligent object recognition