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A-site assisted perovskite crystallization via ion-exchange MOFs for high efficient and stable perovskite solar cells

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Journal of Energy Chemistry 2024年第6期93卷 436-442,I0011页

作者： Xingrui Zhang Jian Zhang Wei Wang Boyuan Hu Yayu Dong Debin Xia Kaifeng Lin Yulin Yang MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangChina

Here,a novel strategy is proposed targeting the volatility of A-site cations and the disordered arrangement of perovskite grains through employing Cs~+contained metal-organic frameworks In-aip(Cs)obtained by ion-exchange and crystalline *** forces between Cs-O atoms split the pore channels of the pristine In-aip,endowing In-aip(Cs)with multidimensional charge transport channels,In addition,the partially freed Cs~+in the interlayer compensates for the vacancy of A-site cations during the perovskite preparation *** In-aip(Cs)modified perovskite films have a flat morphology,large grains and excellent optoelectronic *** from the high-quality perovskite films and faster charge extraction,the In-aip(Cs)-modified PSCs achieved a champion PCE of 23.03%,superior to the In-aip-modified(22.29%)and control device(21.13%),More importantly,the unencapsulated PSCs modified with In-aip(Cs)exhibited outstanding humidity and thermal *** a period of almost 1000 h,the unencapsulated In-aip(Cs)-modified device retained 85%of its initial PCE after storing in a glove box at 85℃,and retained 87%of the primary PCE upon storage in ambient condition at 25℃under a humidity of 40%.

关键词： Metal-organic frameworks PSCs Stability Defect passivation

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engineering spin-dependent catalysts: chiral covalent organic frameworks with tunable electroactivity for electrochemical oxygen evolution

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National Science Review 2024年第9期11卷 29-38页

作者： Ziping Li Yueyuan Xiao Chao Jiang Bang Hou Yan Liu Yong Cui School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University

The chiral-induced spin selectivity（CISS） effect offers promising prospects for spintronics,yet designing chiral materials that enable efficient spin-polarized electron transport remains ***,we report the utility of covalent organic frameworks（COFs） in manipulating electron spin for spin-dependent catalysis via *** enables us to design and synthesize three three-dimensional chiral COFs（CCOFs）with tunable electroactivity and spin-electron conductivity through imine condensations of enantiopure1,1'-binaphthol-derived tetraaldehyde and tetraamines derived from 1,4-benzenediamine,pyrene,or tetrathiafulvalene *** CISS effect of CCOFs is verified by magnetic conductive atomic force *** with their achiral analogs,these CCOFs serve as efficient spin filters,reducing the overpotential of oxygen evolution and improving the Tafel ***,the diarylamine-based CCOF showed a low overpotential of 430 mV（vs reversible hydrogen electrode） at 10 mA cm-2with long-term stability comparable to the commercial *** enhanced spin-dependent OER activity stems from its excellent redox-activity,good electron conductivity and effective suppression effect on the formation of H2O2byproducts.

关键词： 3D chiral COF spin-dependent catalysts CISS electrochemical oxygen evolution

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A critical review on direct catalytic hydrogasification of coal into CH_(4):catalysis process configurations,evaluations,and prospects

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International Journal of Coal Science & technology 2024年第3期11卷 51-85页

作者： Shuai Yan Jun Feng Shenfu Yuan Zihong Xia Fengshuang Han Xuan Qu Jicheng Bi School of Materials and Chemical Engineering Ningbo University of TechnologyNingbo315211ZhejiangChina Zhejiang Institute of Tianjin University Ningbo315201ZhejiangChina State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of SciencesTaiyuan030001China School of Chemical Science and Engineering Key Laboratory of Medicinal Chemistry for Natural ResourceMinistry of EducationNational Center for Experimental Chemistry and Chemical Engineering Education DemonstrationYunnan Provincial Key Laboratory of Carbon Neutral and Green Low-Carbon TechnologyYunnan UniversityKunming650091China Department of Energy and Chemical Engineering East China University of Science and TechnologyShanghai200237China

Coal catalytic hydrogasification(CCHG)is a straightforward approach for producing CH_(4),which shows advantages over the mature coal-to-CH_(4) technologies from the perspectives of CH_(4) yield,thermal efficiency,and CO_(2) *** core of CCHG is to make carbon in coal convert into CH_(4) efficiently with a *** the past decades,intensive research has been devoted to catalytic hydrogasification of model carbon(pitch coke,activated carbon,coal char).However,the chemical process of CCHG is still not well understood because the coal structure is more complicated,and CCHG is a combination of coal catalytic hydropyrolysis and coal char catalytic *** review seeks to shed light on the catalytic process of raw coal during *** configuration of suitable catalysts,operating conditions,and feedstocks for tailoring CH_(4) formation were identified,and the underlying mechanisms were *** on these results,the CCHG process was evaluated,emphasizing pollutant emissions,energy efficiency,and reactor ***,the opportunities and strategic approaches for CCHG under the restraint of carbon neutrality were highlighted by considering the penetration of“green”H2,biomass,and CO_(2) into *** investigations from our laboratories demonstrated that the integrated CCHG and biomass/CO_(2) hydrogenation process could perform as an emerging pathway for boosting CH_(4) production by consuming fewer fossil fuels,fulfilling the context of green *** work not only provides systematic knowledge of CCHG but also helps to guide the efficient hydrogenation of other carbonaceous resources such as biomass,CO_(2),and coal-derived wastes.

关键词： Coal gasification Catalytic hydrogasification Methane Pressurized fluidized bed

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Bead-like cobalt-nitrogen co-doped carbon nanocage/carbon nanofiber composite:A high-performance oxygen reduction electrocatalyst for zinc-air batteries

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Nano Research 2023年第1期16卷 545-554页

作者： Bo Zhang Yige Zhao Lu Li Yukun Li Jin Zhang Guosheng Shao Peng Zhang State Center for International Cooperation on Designer Low-carbon and Environmental Materials(CDLCEM) School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China State Key Laboratory of Chemical Resource Engineering Beijing Key Laboratory of Electrochemical Process and Technology for MaterialsBeijing University of Chemical TechnologyBeijing 100029China

Proper regulation of metal-nitrogen carbon(M-N-C)materials derived from zeolitic imidazolate frameworks(ZIFs)is essential to enhance the oxygen reduction reaction(ORR)***,most of the reports focus on the component regulation,and the structure regulation of ZIFs-derived M-N-C materials by a simple preparation method has been barely ***,using a one-step electrospinning method with subsequent pyrolysis,we have prepared a bead-like cobalt-nitrogen co-doped carbon nanocage/carbon nanofiber(Co-N-C/CNF)composite electrocatalyst with the porous carbon nanocages arranged one by one in the highly conductive carbon *** from the fully exposed active sites and improved conductivity,the Co-NC/CNF catalyst exhibits an excellent ORR performance even surpassing the commercial Pt/C *** functional theory(DFT)results demonstrate that the CoNP-N1-C2 active sites on Co-N-C/CNF make the core contribution to the improvement of ORR ***,the zinc-air battery(ZAB)based on the Co-N-C/CNF catalyst also shows outstanding discharge *** study provides a new strategy for the preparation and structural design for ZIFs-derived M-N-C materials as efficient ORR catalysts.

关键词： bead-like structure carbon nanocages electrospinning technology oxygen reduction reaction zinc−air battery

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Investigation of mass transfer model of CO_(2) absorption with Rayleigh convection using multi-relaxation time lattice Boltzmann method

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Chinese Journal of chemical engineering 2022年第10期50卷 130-142页

作者： Longyun Zheng Kai Guo Hongwei Cai Bo Zhang Hui Liu Chunjiang Liu School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China State Key Laboratory of Chemical Engineering Tianjin UniversityTianjin 300072Chin

CO_(2) absorption into absorbents is a widely used method to reduce carbon emissions,in which the concentration gradient near the gas-liquid interface may induce Rayleigh convection(RC).Once RC occurs,the mass transfer rate will be significantly ***,it is necessary to explore the mass transfer enhancement mechanism further and develop a penetration/surface divergence hybrid mass transfer *** this study,we conduct research on the process of CO_(2) absorption into ethanol with ***,we use a multi-relaxation time lattice Boltzmann method to simulate the absorption process and obtain the flow and concentration *** we also verify the reliability of the numerical simulation results by comparing with the experimental ***,we analyze the characteristics of non-uniform flow and concentration fields in ***,we divide the near-interface region into diffusion-dominated and convection-dominated mass transfer zones by checking whether the horizontal average velocity is greater than 1.0×10^(-4) m·s^(-1).Furthermore,based on the differences in mass transfer mechanisms of the aforementioned two zones,we propose a penetration/surface divergence hybrid model to predict the instantaneous mass transfer *** prediction results demonstrate that the hybrid model can precisely predict the instantaneous mass transfer coefficient of the entire CO_(2) absorption *** proposed hybrid model provides a promising way to deal with the complex mass transfer problems with non-uniform flow and concentration fields.

关键词： Carbon dioxide Absorption Rayleigh convection Numerical simulation multiple-relaxation-time orgeneralized lattice Boltzmannmodel(MRT-LBM) Mass transfer

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An efficient and safe platform based on the tube-in-tube reactor for implementing gas-liquid processes in flow

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Green chemical engineering 2023年第3期4卷 251-263页

作者： Caijin Zhou Bingqi Xie Junxin Chen Yiwei Fan Jisong Zhang State Key Laboratory of Chemical Engineering Department of Chemical EngineeringTsinghua UniversityBeijing100084China Engineering Research Center of Advanced Manufacturing Technology for Fine Chemicals College of Chemical EngineeringFuzhou UniversityFuzhou350116China

Recently,the continuous tube-in-tube reactor based on the Teflon AF membrane is emerging as a powerful toolkit for accelerating gas-liquid mass transfer and reaction *** of its large gas-liquid interfacial area and short mass transfer distance,the reactor can allow a fast gas-liquid mass transfer without direct contact between gas and liquid phases,offering an efficient and safe platform for implementing gas-liquid reaction and rapid determination of gas-liquid *** this review,a detailed description and construction method of this reactor are ***,the recent advancements of the tube-in-tube reactor in fundamental studies and practical applica-tions in gas-involved chemical reactions and biosynthetic processes are ***,a perspective on future potential applications of such flow reactors is provided.

关键词： Tube-in-tube reactor Gas-liquid mass transfer rate Biosynthetic process Gas-liquid reaction

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Organic-free,Ultrafast Synthesis of K-CHA Nano-aggregates with Various Morphologies and Their Adsorption Performances

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chemical Research in Chinese Universities 2024年第6期40卷 1151-1159页

作者： CHU Kailiang WANG Yaquan LIU Wenrong BU Lingzhen HUANG Yitong GUO Niandong QU Liping SANG Juncai LI Yaoning SU Xuemei ZHANG Xian Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering&TechnologyTianjin UniversityTianjin 300072P.R.China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192P.R.China

K-Chabazite(K-CHA)zeolites were synthesized with an ultrafast procedure through an eco-friendly and cost-effective“one-pot”*** solely employing colloidal silica and aluminum hydroxide in the K^(+)/Sr^(2+)system without the assistance of seeds,fluorides or organic structure as directing agents,the K-CHA nano-aggregates were successfully synthesized in a few *** crystallization behavior of the gels with different SiO_(2)/Al_(2)O_(3) molar ratios(SARs)was investigated using X-ray diffraction(XRD);scanning electron microscope(SEM);X-ray fluorescence(XRF);27Al and 29Si magic angle spinning nuclear magnetic resonance(MAS NMR);Fourier-transform infrared spectra(FTIR);UV-Raman *** the nucleation rates were changed with the SARs,three kinds of K-CHA nano-aggregates,namely,hamburger-,disk-and walnut-shaped,were obtained.A possible formation mechanism of the K-CHA nano-aggregates was ***,the walnut-shaped sample with an SAR of 7 possessed the largest pore volume and specific surface area,resulting in the highest methane adsorption ***,it exhibited a CH_(4)/N_(2) selectivity of more than 3 under relative pressures ranging from 0 to *** work offers guidance for modifying the stacking modes of other nano-sized zeolites.

关键词： Chabazite Organic structure directing agent(OSDA)-free Nano-aggregate Methane Adsorption separation

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Nanomaterials Enhanced Sonodynamic Therapy for Multiple Tumor Treatment

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Nano-Micro Letters 2025年第7期17卷 134-167页

作者： Mengyao Yang Xin Wang Mengke Peng Fei Wang Senlin Hou Ruirui Xing Aibing Chen College of Chemical and Pharmaceutical Engineering Hebei University of Science and Technology The Second Hospital of Hebei Medical University State Key Laboratory of Biopharmaceutical Preparation and Delivery Institute of Process EngineeringChinese Academy of Sciences

Sonodynamic therapy(SDT) as an emerging modality for malignant tumors mainly involves in sonosensitizers and low-intensity ultrasound(US), which can safely penetrate the tissue without significant attenuation. SDT not only has the advantages including high precision, non-invasiveness, and minimal side effects, but also overcomes the limitation of low penetration of light to deep tumors. The cytotoxic reactive oxygen species can be produced by the utilization of sonosensitizers combined with US and kill tumor cells. However, the underlying mechanism of SDT has not been elucidated, and its unsatisfactory efficiency retards its further clinical application. Herein, we shed light on the main mechanisms of SDT and the types of sonosensitizers, including organic sonosensitizers and inorganic sonosensitizers. Due to the development of nanotechnology, many novel nanoplatforms are utilized in this arisen field to solve the barriers of sonosensitizers and enable continuous innovation. This review also highlights the potential advantages of nanosonosensitizers and focus on the enhanced efficiency of SDT based on nanosonosensitizers with monotherapy or synergistic therapy for deep tumors that are difficult to reach by traditional treatment, especially orthotopic cancers.

关键词： Nanosonosensitizers Orthotopic tumor Sonodynamic therapy Surmounting the hypoxia Tumor accumulation

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Constructing diverse switchable circularly polarized luminescence via a single azobenzene polymer film

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Chinese chemical Letters 2025年第1期36卷 299-305页

作者： Xiang Wang Qingping Song Zixiang He Gong Zhang Tengfei Miao Xiaoxiao Cheng Wei Zhang State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials Department of Polymer Science and EngineeringCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China School of Chemical and Environmental Engineering Anhui Polytechnic UniversityWuhu 241000China Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials School of Chemistry and Chemical EngineeringHuaiyin Normal UniversityHuaian 223300China

Recently circularly polarized luminescence(CPL)materials have attracted significant *** reversible dynamic property to these materials has been a key focus in cutting-edge fields,such as in high-level information ***,we provided a novel and general strategy involving handednessselective filtration and ground-state chiral self-recovery(CSR)in double film system to address this *** on this strategy,we achieved CPL switch through the reversible modulation of ground-state chirality including absorption and scattering circular dichroism(CD)signals over the full UV-visible wavelength range(365-700 nm)in a single azobenzene polymer(PAzo)*** importantly,by flexibly changing the type of fluorescent films,it is convenient to achieve general excited-state CSR,that is reversible switching of full-color including ideal white(CIE coordinate(0.33,0.33)),as well as room-temperature phosphorescent *** these CPL signals without almost any intensity decay after three cycles of onand-off *** results indicated that the trans-cis isomerization and ordered rearrangement of azobenzene units in PAzo film were the fundamental reasons for realizing CPL ***,based on this system we achieved dynamic visual encryption and decryption process including multiple decryption *** study provides an effective method for constructing a universally applicable chiroptical switch in excited state.

关键词： Circularly polarized luminescence Azobenzene polymer Multiple CPL Chiral switch Information encryption

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De novo synthesis of atropisomeric benzofurans via Cu/SPDO complex catalyzed asymmetric formal[3+2]annulation

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Science China Chemistry 2025年第1期68卷 174-180页

作者： Fan-Xiao Meng Xing-Yu Wang Ka Lu Ju-Song Yang Fu-Min Zhang Ai-Jun Ma Bao Du Yong-Qiang Tu State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou 730000China School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Biotechnology and Health Sciences Wuyi UniversityJiangmen 529020China

Herein,the de novo synthesis of atropisomeric benzofurans through the Cu/spirocyclic-pyrrolidine-oxazoline(SPDO)complex catalyze asymmetric formal[3+2]cycloaddition between quinones and ynamides is explored,producing a range of structurally diverse axially chiral benzofurans in satisfactory yields with good to excellent ***,density functional theory calculations were applied to explain the possible reaction mechanism.

关键词： benzofuran atropisomers novel de novo synthetic strategy asymmetric formal[3+2]cycladdition Cu/SPDO complex DFT calculations

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