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Progress in Natural Science:Materials International 2023年第1期33卷 100-107页

作者： Xingyun Li Liangping Xiao Hao Wang Jingting Song Qingchi Xu Meidan Ye Jun Xu shenzhen research Institute of Xiamen University Department of Physics Research Institute for Biomimetics and Soft Matter Fujian Provincial Key Laboratory for Soft Functional Materials Xiamen University Jiujiang research Institute of Xiamen University Department of Chemistry National University of Singapore

Regulating the electronic structure of the metal electrocatalyst is fundamental for its performance optimizing. The electronic states of the active metal centers are highly dependent on their coordination environment, especially when bonding is formed. The π back-bonding can induce great electron density redistribution around metals, yet it is barely applied in electrocatalyst design. Herein we electrodeposited metallic cobalt on black phosphorus(BP)nanosheets, forming BP-Co with a unique π back-bonding on the interfaces. The BP-Co exhibited high electrocatalytic activity and stability for hydrogen evolution reaction in alkaline electrolyte. The electrochemical and spectroscopic characterizations demonstrated that the BP acted as σ donor and π acceptor to coordinate with electron-rich metallic Co, similar to the phosphine complex. The directional σ bond strengthen the relationship between BP and Co, while the non-directional π bond accelerated the in-plane electron transfer. The π back donation also decreased the oxophilicity of Co to make BP-Co resist the poison from oxygen species. This study can intrigue new thinking prospective for the electrocatalyst design.

关键词： Black phosphorus Pi back-bonding Electrocatalyst Electrodeposition Electronic structure

A robust Janus bilayer with tailored ionic conductivity and interface stability for stable Li metal anodes

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Journal of Energy Chemistry 2022年第11期31卷 368-375,I0010页

作者： Guodong Zhang Pengwei Li Kai Chen Hongfei Zheng Wei He Liangping Xiao Xingyun Li Qingchi Xu Jian Weng Jun Xu Department of Biomaterials College of MaterialsXiamen UniversityXiamen 361005FujianChina bDepartment of Physics Research Institute for Biomimetics and Soft MatterFujian Provincial Key Laboratory for Soft Functional MaterialsXiamen UniversityXiamen 361005FujianChina shenzhen research Institute of Xiamen University Shenzhen 518057GuangdongChina

The formation and growth of Li-dendrites caused by inhomogeneous Li deposition severely hinder the commercial applications of Li metal batteries due to the consequence of ***,we propose a Janus bilayer composed of black phosphorus(BP)and graphene oxide(GO)as an artificial interface with chemical/mechanical stability and well-regulated Li-ion flux distribution for Li metal anode *** to the synergy between the fast Li-ion transport of BP in the inner layer and the high mechanical and chemical stability of GO in the outer layer,the GO/BP with good electrolyte wettability acts as a Li-ion regulator that can induce homogeneous growth of Li to suppress the Li dendrites ***,long-term stability(500 h at 1 mA cm^(-2))with a low overpotential of 30 mV is achieved in the symmetric cell with GO/BP-Li ***,the Li–S cell with GO/BP-Li exhibits enhanced cycling performance with a high capacity retention rate of 76.2%over 500 cycles at 1 C.

关键词： Graphene oxide(GO) Black phosphorus(BP) Artificial interface Janus bilayer Li metal batteries

Sustainable treatment of nitrate-containing wastewater by an autotrophic hydrogen-oxidizing bacterium

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Environmental Science and Ecotechnology 2022年第1期9卷 53-59页

作者： Yi-Zhen Chen Li-Juan Zhang Ling-Yun Ding Yao-Yu Zhang Xi-Song Wang Xue-Jiao Qiao Bao-Zhu Pan Zhi-Wu Wang Nan Xu Hu-Chun Tao Key Laboratory for Heavy Metal Pollution Control and Reutilization School of Environment and EnergyPeking University Shenzhen Graduate SchoolShenzhen518055GuangdongChina College of Health Science and Environmental Engineering Shenzhen Technology UniversityShenzhen518118GuangdongChina State Key Laboratory of Eco-hydraulic in Northwest Arid Region of China Xi'an University of TechnologyXi'an710048ShaanxiChina Department of Civil and Environmental Engineering Virginia Polytechnic Institute and State UniversityManassas20147VirginiaUSA

Bacteria are key denitrifiers in the reduction of nitrate(NO_(3)^(-)N),which is a contaminant in wastewater treatment plants(WWTPs).They can also produce carbon dioxide(CO_(2))and nitrous oxide(N2O).In this study,the autotrophic hydrogen-oxidizing bacterium Rhodoblastus ***_(2)0 was isolated for sustainable treatment of NO_(3)^(-)N in *** removal of NO_(3)^(-)N and recovery of biomass nitrogen were *** to 99%of NO_(3)^(-)N was removed without accumulation of nitrite and N2O,consuming CO_(2)of 3.25 mol for each mole of NO_(3)^(-)N *** overall removal rate of NO_(3)^(-)N reached 1.1 mg L^(-1)h^(-1)with a biomass content of approximately 0.71 g L^(-1)within 72 ***20 participated in NO_(3)^(-)N assimilation and aerobic *** from 15N-labeled-nitrate test indicated that removed NO_(3)^(-)N was assimilated into organic nitrogen,showing an assimilation efficiency of 58%.Seventeen amino acids were detected,accounting for 43%of the *** loss through aerobic denitrification was only approximately 42%of total *** study suggests that TH_(2)0 can be applied in WWTP facilities for water purification and production of valuable biomass to mitigate CO_(2)and N_(2)O emissions。

关键词： Wastewater Nitrate Hydrogen-oxidizing bacteria Autotrophic assimilation Aerobic denitrification

Realizing high-voltage aqueous zinc-ion batteries with expanded electrolyte electrochemical stability window

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Chinese Chemical Letters 2023年第2期34卷 129-140页

作者： Buke Wu Yongbiao Mu Zheng Li Ming Li Lin Zeng Tianshou Zhao shenzhen Key Laboratory of Advanced Energy Storage Southern University of Science and TechnologyShenzhen 518055China Department of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhen 518055China SUSTech Energy Institute for Carbon Neutrality Southern University of Science and TechnologyShenzhen 518055China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Aqueous zinc-ion batteries(AZIBs) have aroused significant research interest around the world in the past decade. The use of low-cost aqueous electrolytes and a metallic Zn anode with a suitable redox potential and high energy density make AZIBs a potential alternative to commercial Li-ion batteries in the development of next-generation batteries. However, owing to the narrow electrochemical stability window(ESW) of aqueous electrolytes, the choice of cathode materials is limited, because of which AZIBs exhibit a relatively low operating voltage and energy density. Hence, expanding the ESW of aqueous electrolytes is important for the development of practical AZIBs. This paper systematically reviews the electrolyte engineering strategies being explored to broaden the ESW of AZIBs. An in-depth analysis of high-voltage AZIBs is also presented. We suggest that the realization of high-voltage AZIBs depends on the synergistic development of suitable electrolytes and cathode materials. In addition, the cost associated with their fabrication as well as the use of standardized electrochemical tests should be considered during the design of high-voltage AZIBs.

关键词： High voltage Aqueous zinc ion batteries Electrolytes Cathodes Electrochemical stability window

Reduced Ti-MOFs encapsulated black phosphorus with high stability and enhanced photocatalytic activity

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Journal of Energy Chemistry 2021年第2期30卷 185-191,I0007页

作者： Xiao Liu Peijie Fan Liangping Xiao Jian Weng Qingchi Xu Jun Xu Department of Biomaterials College of Materials.Xiamen UniversityXiamen 361005Fujian.China Department of Physics Research Institute for Biomimetics and Soft MatterFujian Provincial Key Laboratory for Soft Functional MaterialsXiamen UniversityXiamen 361005FujianChina shenzhen research Institute of Xiamen University.shenzhen 518057 GuangdongChina China State Key Lab of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy MaterialsCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005FujianChina

The generation of green hydrogen(H_2) energy is of great significance to solve worldwide energy and environmental issues. Reduced Ti based photocatalyst has recently attracted intensive attention due to its excellent photocatalytic activity, while the synthesis of reduced Ti based photocatalysts with high stability is still a great challenge. Here, we report a facile method for synthesis of reduced Ti metal organic frameworks(small amounts of Pt incorporated) encapsulated BP(BP/R-Ti-MOFs/Pt) hybrid nanomaterial with enhanced photocatalytic activity. The strong interaction between Ti and P reduces the valence state of the binding Ti^(4+)on the BP surface, forming abundant reduced Ti^(4+)within R-Ti-MOFs/BP. Such reduced Ti^(4+)render R-Ti-MOFs/BP efficient charge transfer and excellent light absorption capability, thus promote the photocatalytic H_2 production efficiency. Furthermore, the Ti-P interaction stabilizes both reduced Ti^(4+)and BP during the photocatalytic reaction, which greatly enhanced the stability of the obtained BP/R-TiMOFs/Pt photocatalyst.

关键词： 2D materials Reduced Ti-MOFs Black phosphorus Photocatalysis Solar-to-hydrogen conversion Metal-organic frameworks

Bifunctional flexible electrochromic energy storage devices based on silver nanowire flexible transparent electrodes

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International Journal of Extreme Manufacturing 2023年第1期5卷 307-316页

作者： He Zhang Fangyuan Sun Ge Cao Dongyan Zhou Guofan Zhang Jiayun Feng Shang Wang Fengyu Su Yanqing Tian Yan Jun Liu Yanhong Tian State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001People’s Republic of China Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen 518055People’s Republic of China Department of Electrical and Electronic Engineering Southern University of Science and Technology Shenzhen 518055People’s Republic of China Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen 518055People’s Republic of China Key Laboratory of Energy Conversion and Storage Technology(Southern University of Science and Technology) Ministry of EducationShenzhen 518055People’s Republic of China Zhengzhou research Institute Harbin Institute of TechnologyZhengzhou 450041People’s Republic of China

Flexible electrochromic energy storage devices(FECESDs)for powering flexible electronics have attracted considerable *** nanowires(AgNWs)are one kind of the most promising flexible transparent electrodes(FTEs)materials for the emerging flexible ***,fabricating FECESD based on AgNWs FTEs is still hindered by their intrinsic poor electrochemical *** address this issue,a hybrid AgNWs/Co(OH)_(2)/PEDOT:PSS electrode is *** PEDOT:PSS could not only improve the resistance against electrochemical corrosion of AgNWs,but also work as functional layer to realize the color-changing and energy storage ***,the Co(OH)_(2)interlayer further improved the color-changing and energy storage *** on the improvement,we assembled the symmetrical *** the same condition,the areal capacitance(0.8 mF cm^(−2))and coloration efficiency(269.80 cm^(2)C−1)of AgNWs/Co(OH)_(2)/PEDOT:PSS FECESDs were obviously higher than AgNWs/PEDOT:PSS ***,the obtained FECESDs exhibited excellent stability against the mechanical *** areal capacitance remained stable during 1000 times cyclic bending with a 25 mm curvature *** results demonstrated the broad application potential of the AgNWs/Co(OH)_(2)/PEDOT:PSS FECESD for the emerging portable and multifunctional electronics.

关键词： electrochromic device energy storage device silver nanowires flexible transparent electrode

Cryptobiosis-inspired assembly of “AND” logic gate platform for potential tumor-specific drug delivery

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Acta Pharmaceutica Sinica B 2021年第2期11卷 534-543页

作者： Hu Zhou Gang He Yanbin Sun Jingguo Wang Haitao Wu Ping Jin Zhengbao Zha shenzhen Maternity and Child Healthcare Hospital Shandong UniversityShenzhen 518028China School of Food and Biological Engineering School of Instrument Science and Opto-Electronics EngineeringHefei University of TechnologyHefei 230009China

Developing tumor-specific drug delivery systems with minimized off-target cargo leakage remains an enduring *** this study,inspired from the natural cryptobiosis explored by certain organisms and stimuli-responsive polyphenol-metal coordination chemistry,doxorubicin(DOX)-conjugated gelatin nanoparticles with protective shells formed by complex of tannic acid and FeⅢ(DG@TA-FeⅢNPs)were successfully developed as an"AND"logic gate platform for tumor-targeted DOX ***,benefiting from the well-reported photothermal conversion ability of TA-FeⅢcomplex,a synergistic tumor inhibition effect was confirmed by treating 4 T1 tumor-beaing mice with DG@TA-FeⅢNPs and localized near-infrared(NIR)laser *** a proof of concept study,this work present a simple strategy for developing"AND"logic gate platforms by coating enzyme-degradable drug conjugates with detachable polyphenol-metal shells.

关键词： Cryptobiosis "AND"logic gate Polyphenol-metal chemistry Drug delivery Tumor microenvironment

Dimerization extendsπ-conjugation of electron donor-acceptor structures leading to phototheranostic properties beyond the sum of two monomers

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Aggregate 2024年第3期5卷 429-438页

作者： Heng Li Qing Li Ying Gu Mengying Wang Pu Tan Hengtao Wang Liang Han Yulin Zhu Feng He Leilei Tian Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhenP.R.China Department of Chemistry and shenzhen Grubbs Institute Southern University of Science and TechnologyShenzhenP.R.China

Near-infrared(NIR)-IIfluorescence imaging-guided photothermal therapy(PTT)has attracted great research interest,and constructing donor-acceptor(D-A)elec-tronic configurations has become an established approach to lower bandgap and realize NIR-II ***,very fewπ-conjugated phototheranostic agents can realize efficient NIR-II guided PTT using a clinically safe laser power density,implying that sufficient photothermal performance is still *** addition to the continuously refreshed photothermal conversion efficiency levels,the strategies that focus on enhancing light absorptivity have been rarely discussed and endow a new direction for enhancing ***,a dimerizationπ-extension strategy is raised to synthesizeπ-conjugated dimers with A-D-A *** observe that the light absorptivity(ε)of the dimers is strengthened three times owing to the enhanced electronic coupling effect as a result of theπ-conjugation extension,thereby sur-passing the 2-fold increase in chromophore numbers from the monomer to *** to the enhancement in light absorption,the dimers could generate much more photothermal heat than the monomer in in vivo PTT ***,an efficient anti-tumor outcome has been fulfilled by using dimers under a low laser power(0.3 W/cm2).Moreover,the dimers with extendedπ-conjugation struc-tures become more favorable to the radiative excited state decay,thus exhibiting a distinguishing improvement in NIR-II imaging compared with ***-tively,due to the improved light absorptivity,the dimers can gain superior NIR-IIfluorescence brightness and photothermal performance over the recently reported material,which goes beyond the monomer in double doses for in vivo *** these results prove that dimerization is an effective strategy for designing high-performance phototheranostic materials.

关键词： dimerization NIR-IIfluorescence imaging photothermal therapy safe intensity light π-conjugation extension

An invisible hand:Hydrogen bonding guided synthesis of ultrathin two-dimensional amorphous TiO_(2)nanosheets

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Science China Materials 2022年第11期65卷 3017-3024页

作者： Yue Qi Xinqian Zeng Liangping Xiao Xingyun Li Honggang Liao Qingchi Xu Jun Xu Department of Physics Research Institute for Biomimetics and Soft MatterFujian Provincial Key Laboratory for Soft Functional MaterialsXiamen UniversityXiamen 361005China Department of Chemistry College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Department of Chemical Engineering and Materials Science Stevens Institute of TechnologyHobokenNew Jersey07030USA shenzhen research Institute of Xiamen University Shenzhen 518057China

Ultrathin two-dimensional(2 D)porous nanosheets are one of the most promising nanomaterials in various applications,whereas their synthesis is still ***,ultrathin 2 D amorphous TiO_(2)(a-TiO_(2))porous nanosheet aerogel is synthesized via a surfactant-free assembly process followed by low-temperature *** co-existing O-O and-OH groups on the surface of TiO_(2)precursor break the 3 D spherical symmetry,and the hydrogen bonding among the TiO_(2)precursors is proposed as the main driving force guiding the 2 D *** surfactant-free assembly endows the ultrathin a-TiO_(2)porous nanosheet with improved ionic and electronic *** porous structure provides high surface area and easy electrolyte penetration,accelerating the Li ion diffusion rate of the a-TiO_(2)porous *** to the above advantages,the obtained a-TiO_(2)porous nanosheets are one of the best anode materials for lithium-ion batteries,which is proved by the enhanced electrochemical performance.

关键词： amorphous TiO_(2) self-assembly in-situ TEM hydrogen bonding lithium-ion battery

Active constraints selection based semi-supervised dimensionality in ensemble subspaces

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Journal of Systems Engineering and Electronics 2015年第5期26卷 1088-1099页

作者： Jie Zeng Wei Nie Yong Zhang College of Information Engineering Shenzhen University Modern Communication and Information Processing Key Laboratory Shenzhen University ATR Key Laboratory of National Defense Technology Shenzhen University

Semi-supervised dimensionality reduction(SSDR) has attracted an increasing amount of attention in this big-data *** algorithms have been developed with a small number of pairwise constraints to achieve performances comparable to those of fully supervised methods. However, one challenging problem with semi-supervised approaches is the appropriate choice of the constraint set, including the cardinality and the composition of the constraint set, which to a large extent, affects the performance of the resulting algorithm. In this work, we address the problem by incorporating ensemble subspace and active learning into dimensionality reduction and propose a new algorithm, termed as global and local scatter based SSDR with active pairwise constraints selection in ensemble subspaces(SSGL-ESA). Unlike traditional methods that select the supervised information in one subspace,we pick up pairwise constraints in ensemble subspace, where a novel active learning algorithm is designed with both exploration and filtering to generate informative pairwise constraints. The automatic constraint selection approach proposed in this paper can be generalized to be used with all constraint-based semi-supervised learning algorithms. Comparative experiments are conducted on two face database and the results validate the effectiveness of the proposed method.

关键词： semi-supervised dimensionality reduction(SSDR) ensemble subspace active learning machine learning