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Application of powdered activated carbon coating to fabrics in a hybrid filter to enhance mercury removal

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Journal of Environmental Sciences 2019年第6期31卷 58-65页

作者： Jin-Ho Sung Seung-Ki Back Eun-Song Lee Ha-Na Jang Yong-Chil Seo Youn-Suk Kang Myong-Hwa Lee Department of Environmental Engineering Yonsei University J-E Tech Co. Ltd Department of Environmental Engineering Kangwon National University

Elemental mercury(Hg0) is predominant constituent of flue gas emitted from coal-fired power plants. Adsorption has been considered the best available technology for removal of Hg0 from flue gas. However, adsorbent injection increases the amount of ash generated. In the present study, powdered activated carbon(PAC) was coated on polytetrafluoroethylene/glass fiber filters to increase Hg0 removal while concurrently reducing the amount of ash generated. The optimal PAC coating rate was determined in laboratory experiments to ensure better Hg0 removal with low pressure drop. When PAC of particle size less than 45 μm was used, and the areal density was 50 g/m2, the pressure drop remained under 30 Pa while the Hg0 removal efficiency increased to 15.8% from4.3%. The Hg0 removal efficiency also increased with decrease in filtration velocity. The optimal PAC coating rate was applied on a hybrid filter(HF), which was combined with a bag filter and an electrostatic precipitator in a single chamber. Originally designed to remove fine particulates matter, it was retrofitted to the flue gas control device for simultaneous Hg0 removal. By employing the PAC coating, the Hg removal efficiency of the HF increased to 79.79% from 66.35%. Also, a temporary reduction in Hg removal was seen but this was resolved following a cleaning cycle in which the dust layer was removed.

关键词： Mercury hybrid filter Activated carbon Coating filter Coal-fired power plant

Integrated System of Solar Cells with Hierarchical NiCo2O4 Battery-Supercapacitor hybrid Devices for Self-Driving Light-Emitting Diodes

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Nano-Micro Letters 2019年第3期11卷 92-103页

作者： Yuliang Yuan Yangdan Lu BeiEr Jia Haichao Tang Lingxiang Chen YuJia Zeng Yang Hou Qinghua Zhang Qinggang He Lei Jiao Jianxing Leng Zhizhen Ye Jianguo Lu State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiangUniversityHangzhou310027People’s Republic of China Key Laboratory for Biomedical Engineering of Ministry of Education College of Biomedical Engineeringand Instrument ScienceZhejiang UniversityHangzhou310027People’s Republic of China Shenzhen Key Laboratory of Laser Engineering College of Optoelectronic EngineeringShenzhenUniversityShenzhen518060People’s Republic of China4College of Chemical and Biological EngineeringZhejiang UniversityHangzhou310027People’s Republic of China Ningbo Research Institute Zhejiang UniversityNingbo315100People’s Republic of China Ocean College Zhejiang UniversityZhoushan316021People’s Republic of China

An integrated system has been provided with a-Si/H solar cells as energy conversion device,NiCo2O4 battery-supercapacitor hybrid(BSH)as energy storage device,and light emitting diodes(LEDs)as energy utilization device.By designing three-dimensional hierarchical NiCo2O4 arrays as faradic electrode,with capacitive electrode of active carbon(AC),BSHs were assembled with energy density of 16.6 Wh kg-1,power density of 7285 W kg-1,long-term stability with 100% retention after 15,000 cycles,and rather low self-discharge.The NiCo2O4//AC BSH was charged to 1.6 V in 1 s by solar cells and acted as reliable sources for powering LEDs.The integrated system is rational for operation,having an overall efficiency of 8.1% with storage efficiency of 74.24%.The integrated system demonstrates a stable solar power conversion,outstanding energy storage behavior,and reliable light emitting.Our study offers a precious strategy to design a self-driven integrated system for highly efficient energy utilization.

关键词： Integrated system NiCo2O4 Battery-supercapacitor hybrid devices Self-driving LED

Photonic crystals constructed by isostructural metal-organic framework films

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Nano Research 2023年第7期16卷 9569-9576页

作者： Zhihuan Li Jianxi Liu Haoze Wu Jiao Tang Zhongyang Li Yadong Xu Feng Zhou Weimin Liu State Key Laboratory of Solidification Processing Center of Advanced Lubrication and Seal MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Electronic Information School Wuhan UniversityWuhan 430072China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China

Metal-organic framework(MOF)-on-MOF structure allows stacking various types of MOFs with different lattice constants for molecule sieving or filtering.However,the multilayered MOFs-based optical devices have incoherent interference due to the lattice-mismatch at the interface and refractive index(RI)indifference.This paper reports isostructural MOFs-based photonic crystals(PCs)designed by stacking Bragg bilayers of lattice-matched MOFs thin films through a layer-by-layer assembly method.Colloidal nanoparticles(NPs)were homogenously encapsulated in some layers of the MOFs(HKUST-1@NPs)to tune their intrinsic RI during the spraying coating process.The isostructural MOFs-based PCs were constructed on a large scale by sequentially spraying coating the low RI layer of HKUST-1 and high RI layer of HKUST-1@NPs to form the desired number of Bragg bilayers.X-ray photoelectron spectroscopy(XPS)depth profiling proved the Bragg bilayers and the homogenous encapsulation of nanomaterials in certain layers of MOFs.Bandwidth of the PCs was tailored by the thickness and RI of the Bragg bilayers,which had a great consistent with finite difference time domain(FDTD)simulation.Importantly,reflectivity of the isostructural MOFs-based PCs was up to 96%.We demonstrated high detection sensitivity for chemical sensing on the PCs,which could be advanced by encapsulating different types of nanomaterials and designing wide-band isostructural MOFs-based PCs.

关键词： metal-organic frameworks(MOFs) MOF on MOF liquid phase epitaxy(LPE) hybrid photonic crystals(PCs) specific sensing

Construction of 1D/2D α-Fe_(2)O_(3)/SnO_(2) hybrid Nanoarrays for Sub-ppm Acetone Detection

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Research 2020年第1期2020卷 304-314页

作者： Huimin Gong Changhui Zhao Gaoqiang Niu Wei Zhang Fei Wang School of Microelectronics Southern University of Science and TechnologyShenzhen 518055China Department of Electrical and Electronic Engineering Southern University of Science and TechnologyShenzhen 518055China

Exhaled acetone is one of the representative biomarkers for the noninvasive diagnosis of type-1 diabetes.In this work,we have applied a facile two-step chemical bath deposition method for acetone sensors based onα-Fe_(2)O_(3)/SnO_(2) hybrid nanoarrays(HNAs),where one-dimensional(1D)FeOOH nanorods are in situ grown on the prefabricated 2D SnO_(2) nanosheets for on-chip construction of 1D/2D HNAs.After annealing in air,ultrafineα-Fe_(2)O_(3) nanorods are homogenously distributed on the surface of SnO_(2) nanosheet arrays(NSAs).Gas sensing results show that theα-Fe_(2)O_(3)/SnO_(2) HNAs exhibit a greatly enhanced response to acetone(3.25 at 0.4 ppm)at a sub-ppm level compared with those based on pure SnO_(2) NSAs(1.16 at 0.4 ppm)and pureα-Fe_(2)O_(3) nanorods(1.03 at 0.4 ppm),at an operating temperature of 340℃.The enhanced acetone sensing performance may be attributed to the formation ofα-Fe_(2)O_(3)-SnO_(2) n-n heterostructure with 1D/2D hybrid architectures.Moreover,theα-Fe_(2)O_(3)/SnO_(2) HNAs also possess good reproducibility and selectivity toward acetone vapor,suggesting its potential application in breath acetone analysis.

关键词： arrays (3) hybrid

Gas Sensors Based on Chemi?Resistive hybrid Functional Nanomaterials

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Nano-Micro Letters 2020年第6期12卷 27-69页

作者： Yingying Jian Wenwen Hu Zhenhuan Zhao Pengfei Cheng Hossam Haick Mingshui Yao Weiwei Wu School of Advanced Materials and Nanotechnology Interdisciplinary Research Center of Smart SensorsXidian UniversityXi’an 710071People’s Republic of China School of Aerospace Science and Technology Xidian UniversityXi’an 710071People’s Republic of China Department of Chemical Engineering Russell Berrie Nanotechnology InstituteTechnion-Israel Institute of Technology3200003 HaifaIsrael Institute for Integrated Cell-Material Sciences(WPI-iCeMS) Kyoto University Institute for Advanced StudyKyoto UniversityYoshida Ushinomiya-choSakyo-kuKyoto 606-8501Japan

Chemi-resistive sensors based on hybrid functional materials are promising candidates for gas sensing with high responsivity,good selectivity,fast response/recovery,great stability/repeatability,room-working temperature,low cost,and easy-to-fabricate,for versatile applications.This progress report reviews the advantages and advances of these sensing structures compared with the single constituent,according to five main sensing forms:manipulating/constructing heterojunctions,catalytic reaction,charge transfer,charge carrier transport,molecular binding/sieving,and their combinations.Promises and challenges of the advances of each form are presented and discussed.Critical thinking and ideas regarding the orientation of the development of hybrid material-based gas sensor in the future are discussed.

关键词： Gas sensor hybrid Chemi-resistor Functional nanomaterials

Electrospinning Engineering Enables High‑Performance Sodium‑Ion Batteries

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Advanced Fiber Materials 2022年第1期4卷 43-65页

作者： Chuanping Li Min Qiu Ruiling Li Xuan Li Manxi Wang Jiabo He Ganggang Lin Liren Xiao Qingrong Qian Qinghua Chen Junxiong Wu Xiaoyan Li Yiu‑Wing Mai Yuming Chen College of Environmental Science and Engineering Fujian Normal UniversityFuzhou 350000FujianChina College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350000China State Grid Fujian Maintenance Company Fuzhou 350000FujianChina Department of Mechanical Engineering The Hong Kong Polytechnic UniversityKowloonHong KongChina Centre for Advanced Materials Technology(CAMT) School of AerospaceMechanical and Mechatronics Engineering J07The University of SydneySydneyNSW 2006Australia

As a promising energy storage device,sodium-ion batteries(SIBs)have received continuous attention due to their low-cost and environmental friendliness.However,the sluggish kinetics of Na ion usually makes SIBs hard to realize desirable electrochemical performance when compared to lithium-ion batteries(LIBs).The key to addressing this issue is to build up nanostructured materials which enable fast Na-ion insertion/extraction.One-dimensional(1D)nanocarbons have been considered as both the anode and the matrix to support active materials for SIB electrodes owing to their high electronic conductivity and excellent mechanical property.Because of their large surface areas and short ion/electron difusion path,the synthesized electrodes can show good rate performance and cyclic stability during the charge/discharge processes.Electrospinning is a simple synthetic technology,featuring inexpensiveness,easy operation and scalable production,and has been largely used to fabricate 1D nanostructured composites.In this review,we frst give a simple description of the electrospinning principle and its capability to construct desired nanostructures with diferent compositions.Then,we discuss recent developments of carbon-based hybrids with desired structural and compositional characteristics as the electrodes by electrospinning engineering for SIBs.Finally,we identify future research directions to realize more breakthroughs on electrospun electrodes for SIBs.

关键词： Sodium-ion batteries Electrospinning engineering Carbonaceous substrate hybrid

Trojan nanobacteria hybridized with prodrug nanocapsules for efficient combined tumor therapy

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Nano Research 2023年第7期16卷 9651-9662页

作者： Mingsong Zang Yuancheng Ji Xiaoran Ding Zhengwei Xu Jinxing Hou Jianxin Sun Jiayun Xu Shuangjiang Yu Hongcheng Sun Tingting Wang Junqiu Liu State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education Key Laboratory of Organosilicon Material Technology of Zhejiang ProvinceCollege of MaterialChemistry and Chemical EngineeringHangzhou Normal UniversityHangzhou 311121China Department of Biomedical Engineering College of Design and EngineeringNational University of SingaporeSingapore 117583Singapore

Live bacteria-based drug delivery systems have been raised as promising tools for enhancing drug delivery into tumors due to their active tumor targeting and easy surface modifiability.In this work,a“Trojan nanobacteria hybrid”,E.coli@highly integrated nanocapsules(HINCs)hybrid(HINE-hybrid),was successfully constructed with HINCs of prodrug based on covalent selfassembly and the facultative anaerobic bacterium E.coli MG 1655 for combined chemotherapy,photothermal therapy(PTT),and chemodynamic therapy(CDT).HINCs were constructed by covalent cross-linking of pillar[5]arene derivatives and cisplatin prodrug linker,which can be endocytosed and lysed to release therapeutic agents.Under the near-infrared(NIR)light(at 808 nm)irradiation,the system temperature can be significantly increased by HINCs,which further leads to the highly efficient generation of reactive oxygen species(ROS).In addition,HINE-hybrid shows significant antitumor effects in in vitro and in vivo studies and also promotes immune cell infiltration and antitumor cytokine expression in the tumor microenvironment(TME).HINEhybrid exerts its anticancer properties efficiently due to selective enrichment and multiplication of E.coli at tumor sites,which is important for the construction of bacterial-assisted antitumor platforms.

关键词： live bacteria hybrid covalent nanocapsule photothermal therapy chemodynamic therapy

A water-evaporation-induced self-charging hybrid power unit for application in the Internet of Things

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科学通报：英文版 2019年第19期64卷 1409-1417页

作者： Haoxuan He Tianming Zhao Hongye Guan Tianyan Zhong Hui Zeng Lili Xing Yan Zhang Xinyu Xue School of Physics University of Electronic Science and Technology of ChinaChengdu610054China College of Sciences Northeastern UniversityShenyang110819China

A self-charging hybrid power unit has been developed by integrating a water-evaporation-induced nano- generator with a flexible nano-patterned supercapacitor. The nanogenerator can harvest environmental thermal energy and mechanical energy through the water evaporation process, and the supercapacitor can be charged simultaneously. The former offers stable electrical power as output, whereas the Ppy- based supercapacitor shows a capacitance of 12.497 m F/cm^2 with 96.42% retention after 4,000 cycles. After filling the power unit with water as the fuel, it can be fully charged in about 20 min. The power unit can be flexibly integrated with electronic devices such as sensor nodes and wireless transmitters employ- ing the Internet of Things. This new approach can offer new possibilities in continuous future operation of randomly distributed electronic devices incorporated in the Internet of Things.

关键词： Self-charging hybrid power unit Water evaporation Nanogenerator Supercapacitor Internet of Things

hybrid calibration method for six-component force/torque transducers of wind tunnel balance based on support vector machines

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Chinese Journal of Aeronautics 2013年第3期26卷 554-562页

作者： Ma Yingkun Xie Shilin Zhang Xinong Luo Yajun State Key Laboratory for Strength and Vibration of Mechanical Structures School of Aerospace Xi'an Jiaotong University

A hybrid calibration approach based on support vector machines （SVM） is proposed to characterize nonlinear cross coupling of multi-dimensional transducer. It is difficult to identify these unknown nonlinearities and crosstalk just with a single conventional calibration approach. In this paper, a hybrid model comprising calibration matrix and SVM model for calibrating linearity and nonlinearity respectively is built up. The calibration matrix is determined by linear artificial neural network （ANN）, and the SVM is used to compensate for the nonlinear cross coupling among each dimension. A simulation of the calibration of a multi-dimensional sensor is conducted by the SVM hybrid calibration method, which is then utilized to calibrate a six-component force/torque transducer of wind tunnel balance. From the calibrating results, it can be indicated that the SVM hybrid calibration method has improved the calibration accuracy significantly without increasing data samples, compared with calibration matrix. Moreover, with the calibration matrix, the hybrid model can provide a basis for the design of transducers.

关键词： hybrid Multi-dimensional Nonlinear coupling Support vector machines Transducers