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Accelerated oxidation of VOCs via vacuum ultraviolet photolysis coupled with wet scrubbing process

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Journal of Environmental Sciences 2023年第12期134卷 55-64页

作者： ruijie xie Dongxue Lei Xiaowen xie Ziyi Suo Dennis Y.C.Leung Jianping Cao Fang Ruimei Haibao Huang School of Environmental Science and Engineering Sun Yat-sen UniversityGuangzhou 510275China Department of Mechanical Engineering University of Hong KongHong Kong 999077China College of Environment and Resources Chongqing Technology and Business UniversityChongqing 400067China Scientific Research Academy of GuangXi Environmental Protection Nanning 530022China

Vacuum ultraviolet(VUV) photolysis is a facile method for volatile organic compounds(VOCs) elimination, but is greatly limited by the relatively low removal efficiency and the possible secondary pollution. To overcome above drawbacks, we developed an efficient method for VOCs elimination via VUV photolysis coupled with wet scrubbing process. In this coupled process, volatile toluene, a representative of VOCs, was oxidized by the gas-phase VUV photolysis, and then scrubbed into water for further oxidation by the liquid-phase VUV photolysis. More than 96% of toluene was efficiently removed by this coupled process, which was 2 times higher than that in the gas-phase VUV photolysis. This improvement was attributed to the synergistic effect between gas-phase and liquid-phase VUV photolysis. O3and HO·are the predomination reactive species for the toluene degradation in this coupled process, and the generation of O3in gas-phase VUV photolysis can efficiently enhance the HO·production in liquid-phase VUV photolysis. The result from in-situ proton transfer reaction ionization with mass analyzer(PTR-MS) further suggested that most intermediates were trapped by the wet scrubbing process and efficiently oxidized by the liquid-phase VUV photolysis, showing a high performance for controlling the secondary pollution. Furthermore, the result of stability test and the reuse of solution demonstrated that this coupled process has a highly stable and sustainable performance for toluene degradation. This study presents an environmentally benign and highly efficient VUV photolysis for gaseous VOCs removal in the wet scrubbing process.

关键词： Volatile organic compounds(VOCs) Vacuum ultraviolet(VUV)photolysis Wet scrubbing process Toluene degradation Intermediates analysis

UV light-induced oxygen doping in graphitic carbon nitride with suppressed deep trapping for enhancement in CO_(2) photoreduction activity

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Journal of Materials Science & Technology 2023年第2期133卷 135-144页

作者： Xiaolong Zhao Xiaoping Yi Wending Pan Yifei Wang Shijing Luo Yingguang Zhang ruijie xie Dennis Y.C.Leung Department of Mechanical Engineering the University of Hong KongPokfulam RoadHong KongChina School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China School of Mechanical Engineering and Automation Harbin Institute of TechnologyShenzhen 518055China

While photoreduction of CO_(2) to CH 4 is an effective means of producing value-added fuels,common pho-tocatalysts have poor activity and low selectivity in photocatalytic CO_(2)-reduction *** though creating defects is an effective photocatalyst fabrication route to improve photocatalytic activity,there are some challenges with the facile photocatalyst synthesis *** this work,an O element is in-troduced into a graphitic carbon nitride(CN)skeleton through a precursory ultraviolet light irradiation pretreatment to increase the visible light absorption and enhance the carrier density of this modified non-metal CN photocatalyst;the charge transfer dynamics thereof are also studied through electrochem-ical tests,photoluminescence spectroscopy,and nanosecond transient *** verify that the op-timized sample exhibits lower charge recombination and a suppressed 84 ns electron-trapping lifetime,compared to the 103 ns electron-trapping lifetime of the CN counterpart,and thereby contributes to ro-bust detrapping and a fast transfer of active *** density functional theory calculations,we find that the improved light absorption and increased electron density are ascribed to O-element doping,which enhances the CO_(2) adsorption energy and improves the CO_(2)-to-CH 4 photoreduction activity;it be-comes 17 times higher than that of the bare CN,and the selectivity is 3.8 times higher than that of ***,the optimized sample demonstrates excellent cyclic stability in a 24-hour cycle test.

关键词： UV light Oxygen doping Charge transfer Graphitic carbon nitride CO_(2)reduction

CNT@leather-based electronic bidirectional pressure sensor

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Science China(Technological Sciences) 2020年第10期63卷 2137-2146页

作者： CHEN Yuan Yuan xie ruijie ZOU BingHua LIU YiHan ZHANG Kang LI Sheng ZHENG Bing ZHANG WeiNa WU JianSheng HUO Feng Wei Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) Nanjing Tech University(NanjingTech)Nanjing 211816China

The ability of perceiving external pressures and conducting corresponding signals is one of the important functions of flexible electronics,which has been widely studied in electronic skin,prosthetics,robotics,healthcare,human-machine interfaces,*** sensor should not be limited to the detection of unidirectional ***,a leather-based electronic pressure sensor and corresponding arrays with bidirectional sensing capability are *** sensor/arrays consisting of two pieces of stacked leather both modified with acidified carbon nanotubes(a-CNTs)can achieve multi-level response to pressure over a broad working range and sense pulling force opposite to *** polyurethane mixed with ferriferrous oxide(Fe3O4)powder being applied to their upper surface,the resistive sensor/individual units of arrays can also detect the magnetic field because of the contactless pulling force generated by the magnetized *** able to sense pressure,pulling force and magnetic field,the leather-based electronic bidirectional pressure sensor and corresponding arrays with good performance not only exhibit potential for mass production and their broad application prospects,but also provide a new insight for the development of flexible electronics.

关键词： flexible electronics leather bidirectional detection pressing/pulling force magnetic field sensing

A temperature responsive adhesive hydrogel for fabrication of flexible electronic sensors

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npj Flexible Electronics 2022年第1期6卷 603-612页

作者： Wan Liu ruijie xie Jingyu Zhu Jiansheng Wu Junfeng Hui Xiaoyan Zheng Fengwei Huo Daidi Fan Shaanxi Key Laboratory of Degradable Biomedical Materials Shaanxi R&D Center of Biomaterials and Fermentation EngineeringSchool of Chemical and EngineeringNorthwest UniversityTaibai North Road 229Xi’anShaanxi 710069China Biotech.&Biomed.Research Institute Northwest UniversityTaibai North Road 229Xi’anShaanxi 710069China Key Laboratory of Flexible Electronics(KLOFE) Institute of Advanced Materials(IAM)Nanjing Tech University30 South Puzhu RoadNanjing 211816China

Flexible electronics are playing an increasingly important role in human health monitoring and healthcare *** adhesion on human tissue would be ideal for reducing interface resistance and motion artifacts,but arising problems such as skin irritation,rubefaction,and pain upon device removal have hampered their ***,inspired by the temperature reversibility of hydrogen bonding,a skin-friendly conductive hydrogel with multiple-hydrogen bonds was designed by using biocompatible poly(vinyl alcohol)(PVA),phytic acid(PA),and gelatin(Gel).The obtained PVA/PA/Gel(PPG)hydrogel with temperature-triggered tunable mechanic could reliably adhere to skin and detect electrophysiological signals under a hot compress while be readily removed under a cool ***,the additional advantages of transparency,breathability,and antimicrobial activity of the PPG hydrogel ensure its long-time wearable value on the *** is both environmentally friendly and cost saving for the waste PPG hydrogel during production can be recycled based on their reversible physical *** PPG hydrogel sensor is expected to have good application prospects to record electrophysiological signals in human health monitoring.

关键词： hydrogel removed bonds

Highly Stretchable and Permeable Conductors Based on Shrinkable Electrospun Fiber Mats

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Advanced Fiber Materials 2021年第5期3卷 302-311页

作者： Qingsong Li Chen Ding Wei Yuan ruijie xie Xiaomeng Zhou Yang Zhao Mei Yu Zijian Yang Jing Sun Qiong Tian Fei Han Hanfei Li Xinping Deng Guanglin Li Zhiyuan Liu CAS Key Laboratory of Human‑Machine Intelligence‑Synergy Systems Shenzhen Institutes of Advanced TechnologyChinese Academy of Sciences(CAS)Shenzhen 518055China Printable Electronics Research Centre Suzhou Institute of Nano‑Tech and Nano‑BionicsChinese Academy of SciencesSuzhou 215123China

Wearable on-skin electrodes or conductors should be vapor permeable,strain-insensitive,isotropically stretchable and stable under cyclic *** strategies have been proposed to prepare the required conductors up to now;however,it is a challenge to fabricate them with above properties in a simple *** this paper,a highly permeable and stretchable conductor based on electrospun fluorine rubber fiber mat is *** fibers are pre-stretched in electric field during electrospinning,and they shrink isotropically by~35-40%in area after being detached from the *** obtained fiber mat conductor demonstrates high stretchability up to~170%,and the resistance changes only 0.8 under 60%strain,which is superior to many other strain-insensitive *** conductor possesses high stability,no cracks or structure damage are observed after washing and cyclic ***,the conductor is vapor permeable with a water vapor transmission rate of~850 g m−2 day−1,which is comparable to the normal water evaporation in ambient conditions,indicating that it would not disturb the sweat evaporation when being used on *** conductor is successfully used as stretchable yarns and electromyography(EMG)electrodes,showing high reliability in E-textiles and on-skin applications.

关键词： Electrospinning Shrinkable fiber mat Stretchable conductor Wearable E-textiles EMG signal recording

Regenerating leather waste for flexible pressure sensing applications

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Journal of Leather Science and Engineering 2019年第1期1卷 85-93页

作者： Jie Lei Binghua Zou Runan Zhang Kang Zhang ruijie xie Weina Zhang Jiansheng Wu Sheng Li Bing Zheng Fengwei Huo Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) Nanjing Tech University(NanjingTech)30 South Puzhu RoadNanjing 211816People’s Republic of China

Pressure sensor can be applied in a wide range of fields,such as voice recognition,human motions detection and artificial electronic skin,the sensing of which is greatly influenced by the flexibility and stretchability of substrate ***,based on the piezoresistive effect,new kinds of flexible pressure sensors have been realized from a pair of flexible and biocompatible collagen films:one is coated by silver nanowires(Ag NWs)and the other by interdigital electrode,*** collagen films are regenerated from leather waste and could bring economic benefits to *** prepared pressure sensors are applied for voice recognition and human motion detection.

关键词： Leather waste Collagen films Pressure sensor Flexible Human motion detection

Strenuous exercise-tolerance stretchable dry electrodes for continuous multi-channel electrophysiological monitoring

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npj Flexible Electronics 2022年第1期6卷 745-753页

作者： ruijie xie Qingsong Li Lijun Teng Zhengshuai Cao Fei Han Qiong Tian Jing Sun Yang Zhao Mei Yu Dianpeng Qi Peizhi Guo Guanglin Li Fengwei Huo Zhiyuan Liu CAS Key Laboratory of Human-Machine Intelligence-Synergy Systems Shenzhen Institutes of Advanced TechnologyChinese Academy of Sciences(CAS)Shenzhen 518055China The Institute of Flexible Electronics(IFE Future Technologies)Xiamen UniversityXiamen361005 FujianChina Key Laboratory of Flexible Electronics(KLOFE) School of Flexible Electronics(Future Technologies)Nanjing Tech University30 South Puzhu RoadNanjing 211816China Institute of Materials for Energy and Environment State Key Laboratory of Bio-fibers and Eco-textilesCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China

Electrophysiological monitoring under strenuous exercise by using stretchable dry electrodes is vital for healthcare monitoring,prosthetic control,human−machine interfaces and other biomedical ***,the existing dry electrodes are not applicable to the strenuous exercise situation that always involves both fast moving and profuse ***,we present a nano-thick porous stretchable dry electrode system with high stretchability and water *** system attaches conformably to the skin and stretches with it under Van der Waals forces even at sweating conditions,allowing the detection of electromyogram when moving with an acceleration of 10 g at a sweating rate of 2.8 mg cm^(−2) min^(−1).It is also capable of acquiring electrocardiogram and electroencephalogram *** strategy proposed would enable the biomedical studies and related applications with the requirement of stably recording electrophysiological signals under strenuous exercise scenarios.

关键词： acceleration recording enable

复杂地形环境下基于GAMP-STAP的低空风切变风速估计方法

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电子与信息学报 2023年第2期45卷 576-584页

作者：李海谢瑞杰谢伶莉孟凡旺中国民航大学天津市智能信号与图像处理重点实验室天津300300 中国航空工业集团公司雷华电子技术研究所无锡214063

针对机载气象雷达在复杂的地形环境下探测低空风切变时,地杂波呈现非均匀特征和难以获取足够的独立同分布(IID)样本,导致空时自适应处理(STAP)杂波抑制性能变差,使得风切变风速估计不准的问题。该文基于杂波信号稀疏特性,提出一种广义... 详细信息

针对机载气象雷达在复杂的地形环境下探测低空风切变时,地杂波呈现非均匀特征和难以获取足够的独立同分布(IID)样本,导致空时自适应处理(STAP)杂波抑制性能变差,使得风切变风速估计不准的问题。该文基于杂波信号稀疏特性,提出一种广义近似消息传递(GAMP)STAP方法,GAMP-STAP仅利用少量的样本在复杂地形环境下实现了风速较准确的估计。该方法首先利用杂波脊的先验信息构造稀疏字典,然后在贝叶斯框架下利用GAMP算法估计杂波幅度,恢复杂波功率谱,进而计算杂波协方差矩阵,最后构造STAP滤波器实现杂波抑制以及风切变风速估计。后续实验仿真结果证明了该方法的有效性。

关键词：机载气象雷达风速估计非均匀地杂波广义近似消息传递

Large-scale fully printed“Lego Bricks”type wearable sweat sensor for physical activity monitoring

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npj Flexible Electronics 2023年第1期7卷 20-31页

作者： Wenhui Ji Huanzhuan Liu Yadong Liu Wei Zhang Tong Zhou Xinxin Liu Chao Tao Jiangxuan Dai Baoli Zha ruijie xie Jiansheng Wu Qiong Wu Weina Zhang Lin Li Fengwei Huo Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) Nanjing Tech University(Nanjing Tech)Nanjing 211800China Department of Neurosurgery The First Affiliated Hospital of Nanjing Medical UniversityNanjing 210029China The Institute of Flexible Electronics(IFE Future Technologies)Xiamen UniversityXiamen 361005 FujianChina

Wearable sweat sensors are becoming increasingly popular for their robust capabilities in non-invasive,dynamic,and continuous real-time monitoring of biological ***-time monitoring of large-scale samples is crucial for realizing intelligent health.A major bottleneck for enabling large-scale sweat elucidation is the fabrication of wearable sensors equipped with microfluidic devices and flexible electrodes in a cost-effective,homogeneous performance and rapid large-scale ***,a“Screen+Wax”-printing technique was introduced to prepare these components and construct“Lego Bricks”type wearable sweat sensor sensor to monitor sweat Na^(+)and K^(+).Flexible electrode arrays and paper-based microfluidic layers(they act as building blocks)were fabricated on polyethylene terephthalate and paper surfaces,respectively,using screen printing and wax *** nanoparticles and Na^(+)/K^(+)ion-selective membranes were modified on the electrode surfaces by electrodeposition and drop coating,*** this work,we highlight the excellent performance of the“Lego Bricks”type wearable sweat sensor in testing the Na^(+)and K^(+)imbalance of sweat from different body regions during exercise and,more significantly,to track the physical activity during prolonged exercise under different ***,the prepared“Lego Bricks”wearable sweat ion electrochemical sensor is demonstrated to be capable of large-scale samples elucidation with outstanding performance and costeffectiveness,which is expected to deeply integrate sweat monitoring into physical activity,providing an important tool for intelligent health.

关键词： Screen wear printing