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Photo-driven water splitting photoelectrochemical cells by tandem organic dye sensitized solar cells with I-/I3- as redox mediator

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Science China Chemistry 2020年第2期63卷 228-236页

作者： Shicong Zhang Haonan Ye Haoran Ding Fengtao Yu Jianli Hua Key Laboratory for advanced Material Feringa Nobel Prize Scientist Joint Research Center and School of Chemistry and Molecular EngineeringEast China University of Science and Technology

Dye-sensitized photoelectrochemical tandem cells have shown the promise for light driven hydrogen production from water owing to the low cost,wide absorption spectra in the visible region and ease to process of their constitutive photoelectrode ***,most photo-driven water splitting photoelectrochemical cells driven by organic dye sensitized solar cells exhibit unsatisfactory hydrogen evolution rate,primarily attributed to their poor light capturing ability and low photocurrent *** we present the construction of a tandem system consisting of an organic blue-colored S5 sensitizer-based dyesensitized photoelectrochemical cell(DSPEC) wired in series with three spectral-complemental dyes BTA-2,APP-3 and APP-1 sensitizers-based dye-sensitized solar cell(DSC),*** two spectral-complemental chromophores were used in DSC and DSPEC to ensure that the full solar spectrum could be absorbed as much as *** results showed that the photocurrent of tandem device was closely related to the open-circuit voltage(Voc) of sensitized DSC,in which the tandem configuration consisting of S5 based DSPEC and BTA-2 based DSC gave the best *** this basis,tandem device with the only light energy and no external applied electrical bias was further constructed of BTA-2 based 2-junction DSC and S5 based DSPEC and obtained a photocurrent of 500 μA cm-2 for hydrogen ***,I-/I3-was used as a redox couple between dye regeneration and O2 production on the surface of Pt-IrO2/*** strategy opens up the application of pure organic dyes in DSC/DSPEC tandem device.

关键词： dye-sensitized photoelectrochemical cells water splitting tandem device dye-sensitized solar cells

Evolution of electrical conductivity and semiconductor to metal transition of iron oxides at extreme conditions

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Chinese Physics B 2022年第8期31卷 95-100页

作者： Yukai Zhuang Qingyang Hu Institute of Atomic and molecular Physics Sichuan UniversityChengdu 610065China center for High Pressure Science and Technology advanced Research(HPSTAR) Beijing 100094China

Iron oxides are widely found as ores in Earth's crust and are also important constituents of its *** polymorphism,composition changes,and electronic structures play essential roles in controlling the structure and geodynamic properties of the solid *** all-natural occurring iron oxides are semiconductors or insulators at ambient pressure,they start to metalize under *** in this work,we review the electronic conductivity and metallization of iron oxides under high-pressure conditions found in Earth's lower *** summarize that the metallization of iron oxides is generally controlled by the pressure-induced bandgap closure near the Fermi *** metallization,they possess much higher electrical and thermal conductivity,which will facilitate the thermal convection,support a more stable and thicker D′′layer,and formulate Earth's magnetic field,all of which will constrain the large-scale dynamos of the mantle and core.

关键词： high pressure metallization iron oxides electrical conductivity

Simultaneous bioimaging of MMP-2 and MMP-7 via Au-Se constructed fluorescence nanoprobe

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Science China Chemistry 2020年第1期63卷 135-140页

作者： Xiaonan Gao Wenfei Guo Lulu Jiang Bo Hu Xiaojun Liu Kehua Xu Bo Tang College of Chemistry Chemical Engineering and Materials Science Key Laboratory of Molecular and Nano Probes Ministry of EducationInstitute of Molecular and Nano Science Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong Shandong Normal University

Au-Se bond strategy has been applied to construct fluorescence nanoprobe that is being used to simultaneously dual-image the tumor markers matrix metalloproteinase-2(MMP-2)and matrix metalloproteinase-7(MMP-7)in *** two Se-terminating ligand peptide chains respectively labeled with fluorescein isothiocyanate(FITC)and 5-Carboxytetramethylrhodamine(5-TAMRA)dyes are attached to the surface of Au nanoparticles(NPs).The nanoprobe can be specifically cut off by MMP-2 and MMP-7 respectively to carry out significant enhanced fluorescence recovery for simultaneously imaging both *** nanoprobe not only displays high selectivity and sensitivity towards MMP-2 and MMP-7,but also has strong anti-interference stability against biothiols and enhanced fidelity for avoiding"false positive"*** approach offers new perspectives in designing tumor-related early diagnosis approaches and also provides strategies for clinical applications.

关键词： fluorescence nanoprobe dual detection tumor markers fluorescence imaging Au nanoparticles

Dual elemental modulation in cationic and anionic sites of the multi-metal Prussian blue analogue pre-catalysts for promoted oxygen evolution reaction

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Progress in Natural Science:Materials International 2022年第6期32卷 705-714页

作者： Jun Li Min Guo Xue Yang Jiale Wang Kexin Wang Anran Wang Fengcai Lei Pin Hao Junfeng Xie Bo Tang College of Chemistry Chemical Engineering and Materials Science Key Laboratory of Molecular and Nano Probes (Ministry of Education) Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong Institute of Molecular and Nano Science Shandong Normal University

Designing advanced electrocatalysts for the oxygen evolution reaction（OER） is of great significance owing to its crucial role in facilitating the production of clean hydrogen energy via water *** date,it has been widely accepted that a pre-oxidation process with the in-situ generation of the catalytically active high-valence metal sites is essential for promoting the OER behavior of most transition-metal-based OER catalysts,or more felicitously speaking,***,exploring such pre-catalysts with high pre-oxidation reactivity is of high ***,we proposed the dual elemental modulation in the cationic and anionic sites of the multi-metal Prussian blue analogue（PBA） pre-catalysts,resulting in promoted OER behavior benefitted from the efficient preoxidation ability as well as the multi-metal *** investigations indicate that the Co-containing multimetallic cations and mixed FeⅢCoⅢcyanide anions in NiCuCoⅡ-FeⅢCoⅢPBA（denoted as NiCuCoⅡ-FeⅢCoⅢ） are beneficial to OER catalysis owing to the high intrinsic activity guaranteed by the local Co3+active sites as well as the optimal multi-metal *** the facile pre-oxidation process,additional high-valence Ni,Cu and Fe ions can be in-situ formed and serve as the active sites,thereby resulting in significantly improved OER *** example,the OER current density of NiCuCoⅡ-FeⅢCoⅢexhibits 1.81 times enhancement even after 72 h continuous OER catalysis,and the required overpotential for 10 mA cm-2reduces from 288 mV for the fresh precatalyst to a remarkable record of 251 mV after the pre-oxidation-induced activation,making the optimal PBA-based catalyst a promising candidate for efficient and durable water electrolysis.

关键词： Prussian blue analogue Elemental modulation Oxygen evolution reaction Pre-oxidation Active site

Nanodiamonds as nanomaterial for biomedical field

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Frontiers of Materials Science 2021年第3期15卷 334-351页

作者： Sarah GARIFO Dimitri STANICKI Gamze AYATA Robert NMULLER Sophie LAURENT General Organic and Biomedical Chemistry UnitNuclear Magnetic Resonance(NMR)and Molecular Imaging LaboratoryUniversity of Mons(UMONS)Avenue Maistriau 197000 MonsBelgium center for Microscopy and molecular imaging(CMMI) Rue Adrienne Bolland 86041 GosseliesBelgium

Recent advances in nanotechnology have attracted significant attention to nanodiamonds(NDs)in both industrial and research areas thanks to their remarkable intrinsic properties:large specific area,poor cytotoxicity,chemical resistance,magnetic and optical properties,ease of large-scale production,and surface reactivity make them suitable for numerous applications,including electronics,optics,sensors,polishing materials,and more recently,biological *** interest in diamond platforms for bioimaging and chemotherapy is *** the outstanding features of these particles and their ease of tuning,current and future applications in medicine have the potential to display innovative imaging applications and to be used as tools for monitoring and tracking drug delivery in vivo.

关键词： nanodiamond scale-up synthesis bioimaging hyperpolarization drug delivery

Robust and dynamic underwater adhesives enabled by catechol-functionalized poly(disulfides) network

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National Science Review 2023年第2期10卷 174-182页

作者： Chen-Yu Shi Dan-Dan He Qi Zhang Fei Tong Zhao-Tao Shi He Tian Da-Hui Qu Key Laboratory for advanced Materials and Joint International Research Laboratory of Precision Chemistry and molecular Engineering Feringa Nobel Prize Scientist Joint Research CenterFrontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Chemistry and Molecular Engineering East China University of Science and Technology

Developing molecular approaches to the creation of robust and water-resistant adhesive materials promotes a fundamental understanding of interfacial adhesion mechanisms as well as future applications of biomedical adhesive ***,we present a simple and robust strategy that combines natural thioctic acid and mussel-inspired iron-catechol complexes to enable ultra-strong adhesive materials that can be used underwater and simultaneously exhibit unprecedentedly high adhesion strength on diverse *** experimental results show that the robust crosslinking interaction of the iron-catechol complexes,as well as high-density hydrogen bonding,are responsible for the ultra-high interfacial adhesion *** embedding effect of the hydrophobic solvent-free network of poly(disulfides) further enhances the *** dynamic covalent poly(disulfides) network also makes the resulting materials re configurable,thus enabling reusability via repeated heating and *** molecule-engineering strategy offers a general and versatile solution to the design and construction of dynamic supramolecular adhesive materials.

关键词： adhesives supramolecular materials dynamic polymers non-covalent crosslink iron-catechol complexes

Integral and Momentum Cross Sections for Electron Elastic and Vibrational Excitation Scattering with Nitrogen in the Energy Range 5–30eV

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Chinese Physics Letters 2011年第7期28卷 108-110页

作者： ZENG Yang-Yang FENG Hao SUN Wei-Guo Institute of Atomic and molecular Physics Sichuan UniversityChengdu 610065 School of Physics and Chemistry and Research center for advanced Computation Xihua UniversityChengdu 610039

Integral and momentum transfer cross sections are calculated in the energy range from 5 to 30 eV and compared with other calculated and measured *** overall agreement between our present results and various theoretical and experimental results are *** present results are obtained by solving integrodifferential body-frame vibrational close-coupling *** spherical Gaussian correlation-polarization model potentials with high-order terms and exact exchange effects in a single-configuration Slater determinant are *** analytic Born completion method is also used to calculate high-order scattering matrix elements.

关键词： Elastic Electron vibrational

The helicity of Raman scattered light:principles and applications in two-dimensional materials

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Science China Chemistry 2022年第2期65卷 269-283页

作者： Yan Zhao Bo Xu Lianming Tong Jin Zhang Academy for advanced Interdisciplinary Studies Peking UniversityBeijing 100871China College of Chemistry and molecular Engineering Beijing Science and Engineering Center for NanocarbonsBeijing National Laboratory for Molecular SciencesPeking UniversityBeijing 100871China

Raman spectroscopy has been not only a technique for characterizing the composition and lattice structure of materials,but also a platform to explore the electron-photon and electron-phonon *** excited by circularly polarized light,the Raman scattered light can carry a spin angular momentum±h,which adds a new degree of freedom to study the Raman scattering *** review explains the principles of the helicity of Raman scattered light excited by circular polarization,and introduces the recent advances in the fundamentals and applications of helicity-resolved Raman scattering in two dimensional(2 D)materials,including the assignment of overlapped Raman modes,the characterization of exciton-phonon coupling and the application in chiral *** hope that this review will give a comprehensive understanding of the helicity selection rule in the Raman scattering process and inspire more exploration on the applications of the helicity of Raman scattered light.

关键词： Raman scattering helicity two-dimensional materials chiral phonon electron-phonon coupling

Recent developments of the reconstruction in magnetic particle imaging

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Visual Computing for Industry,Biomedicine,and Art 2022年第1期5卷 290-302页

作者： Lin Yin Wei Li Yang Du Kun Wang Zhenyu Liu Hui Hui Jie Tian CAS Key Laboratory of molecular imaging the State Key Laboratory of Management and Control for Complex SystemsInstitute of AutomationChinese Academy of SciencesBeijing 100190China Beijing Key Laboratory of molecular imaging Beijing 100190China University of Chinese Academy of Sciences Beijing 100049China Medical imaging center the First Affiliated HospitalJinan UniversityGuangdong 510632China Beijing advanced Innovation center for Big Data-Based Precision Medicine School of MedicineBeihang UniversityBeijing 100083China

Magnetic particle imaging(MPI)is an emerging molecular imaging technique with high sensitivity and temporal-spatial *** reconstruction is an important research topic in MPI,which converts an induced voltage signal into the image of superparamagnetic iron oxide particles concentration *** reconstruction primarily involves system matrix-and x-space-based *** this review,we provide a detailed overview of the research status and future research trends of these two *** addition,we review the application of deep learning methods in MPI reconstruction and the current open sources of ***,research opinions on MPI reconstruction are *** hope this review promotes the use of MPI in clinical applications.

关键词： Magnetic particle imaging Image reconstruction System matrix X-space