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Nano Research 2018年第2期11卷 791-803页

作者： Tingting Wang Juanyuan Hao Shengliang Zheng Quan Sun Di Zhang You Wang School of Materials Science and Engineering Harbin Institute of Technology Harbin China

Metal oxide/graphene nanocomposites are emerging as promising materials for developing room-temperature gas sensors. However, the unsatisfactory performances owing to the relatively low sensitivity, slow response, and recovery kinetics limit their applications. Herein, a highly sensitive and rapidly responding room-temperature NO2 gas sensor based on WO3 nanorods/sulfonated reduced graphene oxide （S-rGO） was prepared via a simple and cost-effective hydrothermal method. The optimal sensor response of the WO3/S-rGO sensor toward 20 ppm NO2 is 149% in 6 s, which is 4.7 times higher and 100 times faster than that of the corresponding WO3/rGO sensors. In addition, the sensor exhibits excellent reproducibility, selectivity, and extremely fast recovery kinetics. The mechanism of the WOJS-rGO nanocomposite gas sensor is investigated in detail. In addition to the high transport capability of S-rGO as well as its excellent NO2 adsorption ability, the superior sensing performance of the S-rGO/WO3 sensor can be attributed to the favorable charge transfer occurring at the S-rGO/WO3 interfaces. We believe that the strategy of compositing a metal oxide with functionalized graphene provides a new insight for the future development of room-temoerature gas sensors.

关键词： metal oxide/sulfonatedreduced graphene NO2 gas sensing room temperature rapidly responding WO3 nanorods

NO_(2) sensing with CdS nanowires at room temperature under green light illumination

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Materials Futures 2022年第2期1卷 174-181页

作者： Peipei Li Hongqiang Jin Jia Yu Weiming Chen Runqing Zhao Changyan Cao Weiguo Song National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular SciencesCAS Key Laboratory of Molecular Nanostructure and NanotechnologyInstitute of ChemistryChinese Academy of SciencesBeijing 100190People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China

Detection of ppb-level NO_(2) gas under atmosphere is urgent to meet the requirements of the rapidly developing internet of *** with traditional sensing methods,light illumination has been considered as a key approach for excellent gas sensor performance under moderate ***,we developed a green-light-assisted gas sensor based on cadmium sulfide nanowires(CdS NWs)that has good NO_(2) sensing capability at ambient *** response values of NO_(2) are 236%and 11%to 10 ppm and 12.5 ppb,***,the CdS NWs sensor has a high selectivity for NO_(2) over a variety of interference gases,as well as good *** cleaning light activation and the sulfur vacancy-trapped charge behavior of CdS NWs are observed,which suggest a light-assisted sensing *** results suggest that light-induced charge separation behavior might significantly improve gas-sensing characteristics.

关键词： NO_(2) CdS room temperature green light sensing

Recent Progress on Flexible room-temperature Gas Sensors Based on Metal Oxide Semiconductor

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Nano-Micro Letters 2022年第12期14卷 310-351页

作者： Lang-Xi Ou Meng-Yang Liu Li-Yuan Zhu David Wei Zhang Hong-Liang Lu State Key Laboratory of ASIC and System Shanghai Institute of Intelligent Electronics&SystemsSchool of MicroelectronicsFudan UniversityShanghai 200433People’s Republic of China Yiwu Research Institute of Fudan University Chengbei RoadYiwu City 322000ZhejiangPeople’s Republic of China

With the rapid development of the Internet of Things,there is a great demand for portable gas *** oxide semiconductors(MOS)are one of the most traditional and well-studied gas sensing materials and have been widely used to prepare various commercial gas ***,it is limited by high operating *** current research works are directed towards fabricating high-performance flexible room-temperature(FRT)gas sensors,which are effective in simplifying the structure of MOS-based sensors,reducing power consumption,and expanding the application of portable *** article presents the recent research progress of MOS-based FRT gas sensors in terms of sensing mechanism,performance,flexibility characteristics,and *** review comprehensively summarizes and discusses five types of MOS-based FRT gas sensors,including pristine MOS,noble metal nanoparticles modified MOS,organic polymers modified MOS,carbon-based materials(carbon nanotubes and graphene derivatives)modified MOS,and two-dimensional transition metal dichalcogenides materials modified *** effect of light-illuminated to improve gas sensing performance is further ***,the applications and future perspectives of FRT gas sensors are also discussed.

关键词： Metal oxide semiconductor Flexible gas sensor room temperature Nanomaterials

Berlin Green Framework‑Based Gas Sensor for room‑temperature and High‑Selectivity Detection of Ammonia

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Nano-Micro Letters 2021年第4期13卷 146-158页

作者： Tingqiang Yang Lingfeng Gao Wenxuan Wang Jianlong Kang Guanghui Zhao Delong Li Wen Chen Han Zhang Institute of Microscale Optoelectronics Collaborative Innovation Centre for Optoelectronic Science and TechnologyKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen Key Laboratory of Micro‑Nano Photonic Information TechnologyGuangdong Laboratory of Artificial Intelligence and Digital Economy(SZ)Shenzhen UniversityShenzhen 518060People’s Republic of China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070People’s Republic of China Research Center for Materials Genome Engineering Wuhan University of TechnologyWuhan 430070People’s Republic of China

Ammonia detection possesses great potential in atmosphere environmental protection,agriculture,industry,and rapid medical ***,it still remains a great challenge to balance the sensitivity,selectivity,working temperature,and response/recovery *** this work,Berlin green(BG)framework is demonstrated as a highly promising sensing material for ammonia detection by both density functional theory simulation and experimental gas sensing *** in BG framework offers abundant active sites for ammonia absorption,and the absorbed ammonia transfers sufficient electron to BG,arousing remarkable enhancement of *** BG framework shows remarkable response to ammonia at 50–110°C with the highest response at 80°C,which is jointly influenced by ammonia’s absorption onto BG surface and insertion into BG *** sensing performance of BG can hardly be achieved at room temperature due to its high *** of conductive Ti3CN MXene overcomes the high resistance of pure BG framework,and the simply prepared BG/Ti3CN mixture shows high selectivity to ammonia at room temperature with satisfying response/recovery speed.

关键词： Berlin green framework Gas sensor Ammonia room temperature High selectivity

Ultrasensitive room-temperature geranyl acetone detection based on Fe@WO_(3−x) nanoparticles in cooked rice flavor analysis

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先进陶瓷(英文) 2023年第8期12卷 1547-1561页

作者： Zichen Zheng Kewei Liu Yiwen Zhou Marc Debliquy Chao Zhang College of Mechanical Engineering Yangzhou UniversityYangzhou 225127China Service de Science des Matériaux FacultéPolytechniqueUniversitéde MonsMons 7000Belgium

In the assessment of food quality,geranyl acetone plays a crucial role as a volatile organic compound(VOC)biomarker for diverse agricultural products,while the ultralow concentration detection meeting application requirements has been barely ***,an iron(Fe)-doped WO_(3−x) gas sensor was employed for greatly sensitive,selective,and scalable geranyl acetone *** results proved that precisely-regulated oxygen vacancy(OV)and sophisticatedly-active electron transition of Fe-doped WO_(3−x) nanoparticles were fulfilled by modifying the doping amount of Fe^(3+),leading to the prominently enhanced sensitivity(23.47 at 6 ppm),low limit of detection(LOD)(237 ppb),optimal selectivity,and outstanding long-term ***,the enhancing mechanism of gas sensing performance was substantiated through density functional theory(DFT)calculation,while the practical application for the evaluation of spoiled cooked rice was conducted as *** study demonstrates a reliable method for detecting a VOC biomarker in cooked rice,which can ensure food security and improve palatability of cooked rice.

关键词： tungsten trioxide(WO_(3)) gas sensor doping geranyl acetone room temperature density functional theory(DFT)

Composite polymer electrolyte reinforced by graphitic carbon nitride nanosheets for room-temperature all-solid-state lithium batteries

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Chinese Journal of Chemical Engineering 2023年第2期54卷 257-263页

作者： Qingyue Han Suqing Wang Wenhan Kong Bing Ji Haihui Wang School of Chemistry and Chemical Engineering South China University of TechnologyGuangzhou 510640China Beijing Key Laboratory for Membrane Materials and Engineering Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

By virtue of the flexibility and safety, polyethylene oxide(PEO) based electrolytes are regarded as an appealing candidate for all-solid-state lithium batteries. However, their application is limited by the poor ionic conductivity at room temperature, narrow electrochemical stability window and uncontrolled growth of lithium dendrite. To alleviate these problems, we introduce the ultrathin graphitic carbon nitride nanosheets(GCN) as advanced nanofillers into PEO based electrolytes(GCN-CPE). Benefiting from the high surface area and abundant surface N-active sites of GCN, the GCN-CPE displays decreased crystallinity and enhanced ionic conductivity. Meanwhile, Fourier transform infrared and chronoamperometry studies indicate that GCN can facilitate Li+migration in the composite electrolyte. Additionally, the GCN-CPE displays an extended electrochemical window compared with PEO based electrolytes. As a result, Li symmetric battery assembled with GCN-CPE shows a stable Li plating/stripping cycling performance, and the all-solid-state Li/LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2)(NCM622) batteries using GCN-CPE exhibit satisfactory cyclability and rate capability in a voltage range of 3-4.2 V at 30 ℃.

关键词： Electrolytes Polymers Graphitic carbon nitride nanosheets Composites room temperature All-solid-state battery

Highly Thermally Conductive Polymer/Graphene Composites with Rapid room‑temperature Self‑Healing Capacity

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Nano-Micro Letters 2022年第8期14卷 194-207页

作者： Huitao Yu Can Chen Jinxu Sun Heng Zhang Yiyu Feng Mengmeng Qin Wei Feng School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials Tianjin UniversityTianjin 300350People’s Republic of China Key Laboratory of Materials Processing and Mold Ministry of EducationZhengzhou UniversityZhengzhou 450002People’s Republic of China

Composites that can rapidly self-healing their structure and function at room temperature have broad application ***,in view of the complexity of composite structure and composition,its self-heal is facing *** this article,supramolecular effect is proposed to repair the multistage structure,mechanical and thermal properties of composite materials.A stiff and tough supramolecular frameworks of 2-[[(butylamino)carbonyl]oxy]ethyl ester(PBA)–polydimethylsiloxane(PDMS)were established using a chain extender with double amide bonds in a side chain to extend prepolymers through ***,by introducing the copolymer into a folded graphene film(FGf),a highly thermally conductive composite of PBA–PDMS/FGf with self-healing capacity was *** ratio of crosslinking and hydrogen bonding was optimized to ensure that PBA–PDMS could completely self-heal at room temperature in 10 ***,PBA–PDMS/FGf exhibits a high tensile strength of 2.23±0.15 MPa at break and high thermal conductivity of 13±0.2 W m^(−1)K^(−1);of which the self-healing efficiencies were 100%and 98.65%at room temperature for tensile strength and thermal conductivity,*** excellent self-healing performance comes from the efficient supramolecular interaction between polymer molecules,as well as polymer molecule and *** kind of thermal conductive self-healing composite has important application prospects in the heat dissipation field of next generation electronic devices in the future.

关键词： Carbon/polymer composites Self-healing capacity High thermal conductivity Molecular simulation room temperature

room-temperature strong coupling between dipolar plasmon resonance in single gold nanorod and two-dimensional excitons in monolayer WSe_2

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Chinese Physics B 2018年第9期27卷 144-150页

作者： Jinxiu Wen Hao Wang Huanjun Chen Shaozhi Deng Ningsheng Xu State Key Laboratory of Optoelectronic Materials and Technologies Guangdong Province Key Laboratory of Display Material and TechnologySun Yat-sen UniversityGuangzhou 510275China School of Electronics and Information Technology Sun Yat-sen UniversityGuangzhou 510006China School of Physics Sun Yat-sen UniversityGuangzhou 510275China School of Applied Physics and Materials Wuyi UniversityJiangmen 529020China

All-solid-state strong coupling systems with large vacuum Rabi splitting energy have great potential applications in future quantum information technologies, such as quantum manipulations, quantum information storage and processing,and ultrafast optical switches. Monolayer transition metal dichalcogenides（TMDs） have recently been explored as excellent candidates for the observation of solid-state strong coupling phenomena. In this work, from both experimental and theoretical aspects, we explored the strong coupling effect by integrating an individual plasmonic gold nanorod into the monolayer tungsten diselenide（WSe2）. Evident anti-crossing behavior was observed from the coupled energy diagram at room temperature; a Rabi splitting energy of 98 meV was extracted.

关键词： Au nanorod-WSe2 heterostructures strong coupling all-solid-state system room temperature

room-temperature Gas Sensors Under Photoactivation:From Metal Oxides to 2D Materials

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Nano-Micro Letters 2020年第11期12卷 292-328页

作者： Rahul Kumar Xianghong Liu Jun Zhang Mahesh Kumar Department of Electrical Engineering Indian Institute of Technology JodhpurJodhpur 342037India College of Physics Center for Marine Observation and CommunicationsQingdao UniversityQingdao 266071People’s Republic of China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin 300071People’s Republic of China

room-temperature gas sensors have aroused great attention in current gas sensor technology because of deemed demand of cheap,low power consumption and portable sensors for rapidly growing Internet of things *** an important approach,light illumination has been exploited for room-temperature operation with improving gas sensor's attributes including sensitivity,speed and *** review provides an overview of the utilization of photoactivated nanomaterials in gas sensing ***,recent advances in gas sensing of some exciting different nanostructures and hybrids of metal oxide semiconductors under light illumination are ***,excellent gas sensing performance of emerging two-dimensional materialsbased sensors under light illumination is discussed in details with proposed gas sensing *** impressive features from the interaction of photons with sensing materials are elucidated in the context of modulating sensing ***,the review concludes with key and constructive insights into current and future perspectives in the light-activated nanomaterials for optoelectronic gas sensor applications.

关键词： Gas sensor room temperature Photoactivation Metal oxide 2D materials

Surface microstructure-controlled ZrO_(2) for highly sensitive room-temperature NO2 sensors

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Nano Materials Science 2021年第3期3卷 268-275页

作者： Yuhua Yan Zongtao Ma Jingyao Sun Miaomiao Bu Yanming Huo Ziying Wang Yunfei Li Ning Hu Tianjin Key Laboratory of Electronic Materials and Devices School of Electronics and Information EngineeringHebei University of Technology5340 Xiping RoadTianjin300401PR China State Key Laboratory of Reliability and Intelligence Electrical Equipment Hebei University of TechnologyTianjin300130PR China National Engineering Research Center for Technological Innovation Method and Tool And School of Mechanical EngineeringHebei University of TechnologyTianjin300401PR China Center for Advanced Laser Technology Hebei University of TechnologyTianjin300401PR China Hebei Key Laboratory of Advanced Laser Technology and Equipment Tianjin300401PR China

The high sensitivity of room-temperature gas sensors is the key to innovation in the areas of environment,energy conservation and ***,metal-oxide-based sensors generally operate at high ***,we designed three ZrO_(2)-based sensors and explored their NO_(2)sensing properties at room ***_(2)with three different morphologies and microstructure were synthesized by simple hydrothermal *** microstructures of sensing materials are expected to significantly affect gas sensing *** rod-shaped ZrO_(2)(ZrO_(2)-R)displayed the advantages such as higher crystallinity,larger pore size,narrower band gap and more chemisorbed adsorbed oxygen,compared to hollow sphere-shaped ZrO_(2)(ZrO_(2)-HS),stellate-shaped ZrO_(2)(ZrO_(2)–S).The ZrO_(2)-R sensor showed the highest response towards 30 ppm NO_(2)(423.8%)at room temperature,and a quite high sensitivity of 198.0%for detecting 5 ppm NO_(2).Although ZrO_(2)-HS and ZrO_(2)–S sensors exhibited lower response towards 30 ppm NO_(2)(232.9%and 245.1%),the response time and recovery time of these two sensors are 5 s/19 s and 4 s/3 s,*** work can provide a new strategy for the development of roomtemperature metal-oxide-based sensors.

关键词： ZrO_(2) room temperature Microstructure Chemisorbed adsorbed oxygen NO_(2)