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TiO_2/Schwertmannite nanocomposites as superior co-catalysts in heterogeneous photo-Fenton process

Journal of Environmental Sciences 2019年第6期31卷 208-217页

作者： Yanping Zhu Chun Zeng Runliang Zhu Yin Xu Xingyan Wang Huijun Zhou Jianxi Zhu Hongping He CAS key laboratory of Mineralogy and Metallogeny Guangdong Provincial Key Laboratory of Mineral Physics and Material Research and Development Guangzhou Institute of Geochemistry Chinese Academy of Sciences University of Chinese Academy of Sciences School of Environmental Science and technology Xiangtan University

The heterogeneous photo-Fenton reaction is an effective technique in combating organic contaminants for both soil and water remediation,and extensive studies have focused on enhancing its efficiency and reducing its *** this work,we developed novel photoFenton catalysts by simply milling commercially available TiO_2(P25)with Schwertmannite(Sh),a natural iron-oxyhydroxysulfate *** expect that the photo-generated electrons from TiO_2could continuously migrate to Sh,which then could enhance the separation of electron-hole pairs on TiO_2and accelerate the reduction of Fe(III)to Fe(II)on Sh,leading to high degradation efficiency of the target organic *** and TEM results showed the distribution of TiO_2on Sh surface for the nanocomposites(TiO_2/Sh).Under simulated sunlight irradiation,the much higher content of Fe(II)was determined on TiO_2/Sh than on Sh via a common method in the iron ore,and the consumption of H_2O_2and the production of·OH were more significant in the TiO_2/Sh system than those in the TiO_2and Sh *** results well support our hypothesis that the photo-generated electrons could migrate from TiO_2to Sh on the composites,and can also explain the much higher degradation efficiency of Rhodamine B(RhB)in the TiO_2/Sh ***,TiO_2/Sh had lower Fe dissolution as compared with Sh,and retained high catalytic stability after four repeated *** merits of the TiO_2/Sh composites,in combining with their simple synthesis method and low-cost property,indicated that they should have promising applications as heterogeneous photo-Fenton catalysts.

关键词： Photo-Fenton reaction Semiconductor Schwertmannite Advanced oxidation

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Superior de/hydrogenation performances of MgH2 catalyzed by 3D flower-like TiO2@C nanostructures

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Journal of Energy Chemistry 2020年第7期29卷 191-198,I0006页

作者： Meng Zhang Xuezhang Xiao Bosang Luo Meijia Liu Man Chen Lixin Chen State key laboratory of Silicon materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027ZhejiangChina key laboratory of Advanced materials and Applications for Batteries of Zhejiang province Hangzhou 310013ZhejiangChina guangdong Provincial key laboratory of Advance Energy Storage materials South China University of TechnologyGuangzhou 510640GuangdongChina

Magnesium hydride has been seen as a potential material for solid state hydrogen storage,but the kinetics and thermodynamics obstacles have hindered its development and ***-dimensional flower-like TiO2@C and TiO2 were synthesized as the catalyst for MgH2 system and great catalytic activities are acquired in the hydrogen sorption *** also show that the flower-like TiO2@C is superior to flower-like TiO2 in improving the hydrogen storage properties of *** hydrogen desorption onset and peak temperatures of flower-like TiO2 doped MgH2 is reduced to 199.2℃and 245.4℃,while the primitive MgH2 starts to release hydrogen at 294.6℃and the rapid dehydrogenation temperature is even as high as 362.6℃.The onset and peak temperatures of flower-like TiO2@C doped MgH2 are further reduced to 180.3℃and 233.0℃.The flower-like TiO2@C doped MgH2 composite can release6.0 wt%hydrogen at 250℃within 7 min,and 4.86 wt%hydrogen at 225℃within 60 min,while flowerlike TiO2 doped MgH2 can release 6.0 wt%hydrogen at 250℃within 8 min,and 3.89 wt%hydrogen at225℃within 60 *** absorption kinetics is also improved ***,compared with primitive MgH2 and the flower-like TiO2 doped MgH2,the activation energy of flower-like TiO2@C doped MgH2 is significantly decreased to 67.10 kJ/*** the improvement of hydrogen sorption properties can be ascribed to the flower-like structure and the two-phase coexistence of TiO2 and amorphous *** phase composition and unique structure are proved to be the critical factor to improve the hydrogen sorption properties of MgH2,which can be considered as the new prospect for improving the kinetics of light-metal hydrogen storage materials.

关键词： Hydrogen storage Magnesium hydride TiO2 Flower-like structure Catalytic effects

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Ultrafast flash memory with large self-rectifying ratio based on atomically thin MoS_(2)-channel transistor

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materials Futures 2022年第2期1卷 153-162页

作者： Liwei Liu Yibo Sun Xiaohe Huang Chunsen Liu Zhaowu Tang Senfeng Zeng David Wei Zhang Shaozhi Deng Peng Zhou Frontier Institute of Chip and System Fudan UniversityShanghai 200433People’s Republic of China State key laboratory of ASIC and System School of MicroelectronicsFudan UniversityShanghai 200433People’s Republic of China State key laboratory of Optoelectronic materials and Technologies Guangdong Province Key Laboratory of Display Material and TechnologySchool of Electronics and Information TechnologySun Yat-sen UniversityGuangzhou 510275People’s Republic of China

Flash memory with high operation speed and stable retention performance is in great demand to meet the requirements of big *** addition,the realisation of ultrafast flash memory with novel functions offers a means of combining heterogeneous components into a homogeneous device without considering impedance *** report proposes a 20 ns programme flash memory with 10^(8) self-rectifying ratios based on a 0.65 nm-thick MoS_(2)-channel transistor.A high-quality van der Waals heterojunction with a sharp interface is formed between the Cr/Au metal floating layer and h-BN tunnelling *** addition,the large rectification ratio and low ideality factor(n=1.13)facilitate the application of the MoS_(2)-channel flash memory as a bit-line select ***,owing to the ultralow MoS_(2)/h-BN heterojunction capacitance(50 fF),the memory device exhibits superior performance as a high-frequency(up to 1 MHz)sine signal *** results pave the way toward the potential utilisation of multifunctional memory devices in ultrafast two-dimensional NAND-flash applications.

关键词： ultra-fast flash memory metal floating gate atomic sharp interface atomic thin channel self-rectification transistor high-frequency rectifier

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Preparing 3D Perovskite Li_(0.33)La_(0.557)TiO_(3)Nanotubes Framework Via Facile Coaxial Electro-Spinning Towards Reinforced Solid Polymer Electrolyte

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Energy & Environmental materials 2023年第4期6卷 273-279页

作者： Yichun Zhao Lin Fan Biao Xiao Shaojun Cai Jingchao Chai Xueqing Liu Jiyan Liu Zhihong Liu Department of Polymer material and Engineering Jianghan UniversityWuhan 430056China key laboratory of Optoelectronic Chemical materials and Devices Ministry of EducationJianghan UniversityWuhan 430056China Flexible display materials and technology Co-innovation Centre of Hubei province Jianghan UniversityWuhan 430056China

It is of significance to construct continuous multiphase percolation channels with fast lithium-ion pathway in hybrid solid electrolytes.3D ceramic nanostructure frameworks have attracted great attention in this ***,the three-dimensional perovskite Li_(0.33)La_(0.557)TiO_(3)nanotubes framework(3D-LLTO-NT)is fabricated via a facile coaxial electro-spinning process followed by a calcination process at 800°*** hybrid polymer electrolyte of 3DLLTO-NT framework and poly(ethylene carbonate)(3D-LLTO-NT@PEC)shows improved ionic conductivity of 1.73×10^(-4)S cm^(-1)at ambient temperature,higher lithium-ion transference number(t_(Li)^(+))of 0.78 and electrochemical stability window up to 5.0 V vs Li/Li^(+).The all-solid-state cell of LiFePO_(4)/3D-LLTO-NT@PEC/Li delivers a high specific capacity of 140.2 mAh g^(-1)at 0.1 C at ambient *** outstanding performance is attributed to the 3D ceramic nanotubes frameworks which provide fast lithium ion transfer pathway and stable interfaces.

关键词： coaxial electro-spinning ion conductivity Li_(0.33)La_(0.557)TiO_(3) nanotubes solid composite electrolyte

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Synthesis of amorphous SeP2/C composite by plasma assisted ball milling for high-performance anode materials of lithium and sodium-ion batteries

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Progress in Natural Science:materials International 2021年第4期31卷 567-574页

作者： Cheng Lin Liuzhang Ouyang Renzong Hu Jun Liu Lichun Yang Huaiyu Shao Min Zhu School of materials Science and Engineering Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials South China University of Technology China-Australia Joint laboratory for Energy & Environmental materials Key Laboratory of Fuel Cell Technology of Guangdong Province Joint key laboratory of the Ministry of Education Institute of Applied Physics and Materials Engineering (IAPME) Department of Physics and Chemistry Faculty of Science and Technology University of Macau

To promote substantially the performances of red phosphorous（P） anode for lithium and sodium-ion batteries, a simple plasma assisted milling（P-milling） method was used to in-situ synthesize SeP2/C composite. The results showed that the amorphous SeP2/C composite exhibits the excellent lithium and sodium storage performances duo to the small nano-granules size and complete combination of selenium（Se） and phosphorous（P） to generate Se–P alloy phase. It was observed that inside the granules of SeP2/C composite the nanometer size of the Se P2particles ensured the fast kinetics for Li+and Na+transfer, and the amorphous carbon wrapping the Se P2particles relieved volume expansion during lithium/sodium storage processes and enhances electric conductivity. Therefore, the SeP2/C electrode retained reversible capacities of 700 m A h g-1at 2 A g-1after 500 cycles and 400 m A h g-1at 0.5 A g-1after 400 cycles as anode for LIBs and SIBs, respectively. The result proves that the amorphous SeP2/C composite can be a new type of anode material with great potential for lithium and sodium-ion batteries.

关键词： Plasma-assisted ball milling SeP 2 /C anode Amorphous structure LIBs SIBs

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Novel Germoles and Their Ladder-Type Derivatives:Modular Synthesis,Luminescence Tuning,and Electroluminescence

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CCS Chemistry 2022年第12期4卷 3798-3808页

作者： Xiaoshuang Xiang Zhikuan Zhou Xing Wu Zhigang Ni Lizhi Gai Xuqiong Xiao Liwen Xu Zujin Zhao Hua Lu Zijian Guo College of material Chemistry and Chemical Engineering Key Laboratory of Organosilicon Chemistry and Material Technology of the Ministry of Educationand Key Laboratory of Organosilicon Material Technology of Zhejiang ProvinceHangzhou Normal UniversityHangzhou 311121 State key laboratory of Luminescent materials and Devices Guangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of TechnologyGuangzhou 510640 State key laboratory of Coordination Chemistry School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023

Considerable effort has been devoted to the design of silicon-containingπ-conjugated materials for application in optoelectronic devices and fluorescent ***,the synthesis and spectroscopic tuning of germanium(Ge)-conjugated systems are challenging because of the paucity of synthetically useful ***,we report a simple and effective method of lithium naphthalenide-induced intramolecular cyclization to construct architecturally diverse Ge-containingπ-conjugated molecules,including benzogermoles and their ladder-type derivatives,with high yields of up to 92%.The photophysical properties of these molecules can befinely controlled by the introduction of electrondonating or-withdrawing substituents,and intense luminescence ranging from deep-blue to red regions in the solid state was observed.A quantitative model based on the Hammett constant against the luminescence wavelength showed a good linear correlation,allowing us to reliably predict and design luminescent materials with specific properties for ***,Ge-bridged ladder-type derivatives exhibited high photoluminescence and efficient deep-blue electroluminescence with good color *** believe this study will open a new avenue to organogermanium chemistry and offers greater flexibility for electronic structural tuning.

关键词： germanium organicπ-conjugated molecules ladder-type compounds luminescence

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A decellularized nerve matrix scaffold inhibits neuroma formation in the stumps of transected peripheral nerve after peripheral nerve injury

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Neural Regeneration Research 2023年第3期18卷 664-670页

作者： Shuai Qiu Pei-Jun Deng Fu-Lin He Li-Wei Yan Zhe-Hui Tu Xiao-Lin Liu Da-Ping Quan Ying Bai Can-Bin Zheng Qing-Tang Zhu Department of Microsurgery and Orthopedic Trauma The First Affiliated HospitalSun Yat-sen UniversityGuangzhouGuangdong ProvinceChina Department of Orthopedic Surgery The Seventh Affiliated HospitalSun Yat-sen UniversityShenzhenGuangdong ProvinceChina Department of Pediatric Orthopedics Guangzhou Women and Children’s Medical CenterGuangzhou Medical UniversityGuangzhouGuangdong ProvinceChina guangdong Provincial Peripheral Nerve Tissue Engineering and technology Research Center GuangzhouGuangdong ProvinceChina guangdong province Engineering laboratory for Soft Tissue Biofabrication GuangzhouGuangdong ProvinceChina School of Chemistry Sun Yat-sen UniversityGuangzhouGuangdong ProvinceChina School of material Science and Engineering Sun Yat-sen UniversityGuangzhouGuangdong ProvinceChina

Traumatic painful neuroma is an intractable clinical disease characterized by improper extracellular matrix(ECM)deposition around the injury *** have shown that the microstructure of natural nerves provides a suitable microenvironment for the nerve end to avoid abnormal hyperplasia and neuroma *** this study,we used a decellularized nerve matrix scaffold(DNM-S)to prevent against the formation of painful neuroma after sciatic nerve transection in *** results showed that the DNM-S effectively reduced abnormal deposition of ECM,guided the regeneration and orderly arrangement of axon,and decreased the density of regenerated *** epineurium-perilemma barrier prevented the invasion of vascular muscular scar tissue,greatly reduced the invasion ofα-smooth muscle actin-positive myofibroblasts into nerve stumps,effectively inhibited scar formation,which guided nerve stumps to gradually transform into a benign tissue and reduced pain and autotomy behaviors in *** findings suggest that DNM-S-optimized neuroma microenvironment by ECM remodeling may be a promising strategy to prevent painful traumatic neuromas.

关键词： decellularized nerve matrix scaffold extracellular matrix fibrosis functional recovery microarchitecture microenvironment pain peripheral nerve tissue remodeling traumatic neuroma

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Achieving a novel solvent-free regeneration of LiBH_(4) combining hydrogen storage and production in a closed material cycle

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Journal of Magnesium and Alloys 2023年第5期11卷 1697-1708页

作者： Kang Chen Hao Zhong Liuzhang Ouyang Fen Liu Hui Wang Jiangwen Liu Huaiyu Shao Min Zhu School of materials Science and Engineering Guangdong Provincial Key Laboratory of Advanced Energy Storage MaterialsSouth China University of TechnologyGuangzhou 510641China China-Australia Joint laboratory for Energy&Environmental materials Key Laboratory of Fuel Cell Technology of Guangdong ProvinceGuangzhou 510641China Joint key laboratory of the Ministry of Education Institute of Applied Physics and Materials Engineering(IAPME)University of MacaoMacao SARChina

LiBH_(4) has been considered as one of the most promising energy storage materials with its ultrahigh hydrogen capacity,which can supply hydrogen through hydrolysis process or realize hydrogen-to-electricity conversion via anodic oxidation reaction of direct borohydride fuel cells(DBFCs).However,the realization of practical hydrogen applications heavily depends on the effective synthesis of high-purity LiBH_(4) and recycling of the spent fuels(LiBO_(2)·xH_(2)O).The present work demonstrates a convenient and high-efficiency solvent-free strategy for regenerating LiBH_(4) with a maximum yield close to 80%,by retrieving its by-products with MgH_(2) as a reducing agent under ambient ***,the hydrogen released from the regeneration course can completely compensate the demand for consumed MgH_(2).The isotopic tracer method reveals that the hydrogen stored in LiBH_(4) comes from both MgH_(2) and coordinated water bound to LiBO_(2).Here,the expensive MgH_(2) can be substituted with the readily available and cost-effective MgH_(2)-Mg mixtures to simplify the regeneration ***,LiBH_(4) catalyzed by CoCl_(2) can stably supply hydrogen to proton exchange membrane fuel cell(PEMFC),thus powering a portable prototype *** combining hydrogen storage,production and utilization in a closed cycle,this work offers new insights into deploying boron-based hydrides for energy applications.

关键词： Lithium borohydride High-energy ball milling Regeneration Hydrogen production Proton exchange membrane fuel cell

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Constructing origami power generator from one piece of electret thin film and application in AIenabled transmission line vibration monitoring

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Microsystems & Nanoengineering 2023年第4期9卷 281-292页

作者： Boming Lyu Huipeng Zhou Yangyang Gao Xinhui Mao Fangzhi Li Jiyuan Zhang Dezhi Nie Wen Zeng Yonglin Lu Jin Wu Zhaoshu Yang Kai Tao Ministry of Education key laboratory of Micro and Nano Systems for Aerospace Northwestern Polytechnical UniversityXi’anPR China Research&Development Institute of Northwestern Polytechnical University in Shenzhen ShenzhenPR China Research Institute of State Grid Jiangsu Electric Power Co. LtdNanjingPR China State key laboratory of Optoelectronic materials and Technologies and the guangdong province key laboratory of display material and technology School of Electronics and Information TechnologySun Yat-sen UniversityGuangzhouPR China National key laboratory of Human Factors Engineering China Astronaut Research and Training CenterBeijingPR China

One of the crucial issues for applying electret/triboelectric power generators in the Internet of Things(IoT)is to take full advantage of specific high voltage signals and enable self-powered ***,inspired by Miura-origami,we present an innovative origami power generator(OPG)constructed from only one piece of electret thin *** Miura-origami architecture realizes a generator with excellent deformability and stretchability and makes it unnecessary for any auxiliary support structure during the compress-release *** parameters of the generator are intensively investigated,including the excitation accelerations,excitation displacements,numbers of power generation units and deformation degree of the *** stimulated with 5.0 g acceleration at 15 Hz frequency,the generator with 8 generation units can obtain an instantaneous peak-to-peak voltage and a remarkable optimum peak power of 328 V and 2152μW at 50MΩ,*** addition,the regulable shape and multiple generation modes of the device greatly improve its applicability in various vibration energy collection *** on the above results,a hexagonal electret generator integrated with six-phase OPGs is developed as a“Buoy on Sky,”after which the signal waveforms generated from internal power generators are recognized with 92%accuracy through a neural network algorithm that identifies the vibration conditions of transmission *** work demonstrates that a fusion of origami art and energy conversion techniques can achieve a multifunctional generator design satisfying the requirements for IoT applications.

关键词： power IoT generator

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Visible light induced oxidative coupling of purines with arenes

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Chinese Chemical Letters 2023年第3期34卷 313-316页

作者： Lamei Liao Dongen Lin Gary Histand key laboratory of Functional Molecular Engineering of guangdong province School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510641China The International School of Advanced materials School of Material Science and EngineeringSouth China University of TechnologyGuangzhou 510640China

The photocatalyzed synthesis of 9-arylpurines has been developed using 9H-purines and non-activated *** method is highly atom economical using an acridinium photocatalyst induced by visible light under air atmosphere ... 详细信息

关键词： Visible light Photocatalysis Purine derivatives C–N bond formation Additive free

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