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Synergy of sodium doping and nitrogen defects in carbon nitride for promoted photocatalytic synthesis of hydrogen peroxide

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Chinese Chemical letters 2024年第8期35卷 324-329页

作者： Fabrice Nelly Habarugira Ducheng yao Wei Miao Chengcheng Chu Zhong Chen Shun Mao College of Environmental Science and Engineering State Key Laboratory of Pollution Control and Resource ReuseTongji UniversityShanghai 200092China Baowu Water Technology Co. Ltd.Research InstituteShanghai 201999China

Photocatalytic synthesis of hydrogen peroxide has gradually become a promising method for in-situ pro-duction of hydrogen peroxide,which relies on sustainable solar ***,the commonly used photocatalyst,i.e.,carbon nitride(CN),still suffers from the drawbacks of narrow light absorption range and fast charge ***,we report a facile method to introduce nitrogen defects into carbon nitride together with sodium *** adjusting the ratio of sodium dicyandiamide,the band gap of carbon nitride can be controlled,while the carrier separation and transfer ability of carbon nitride is *** modified CN with sodium doping and nitrogen defect(SD-CN)demonstrates outstanding H_(2)O_(2)pro-duction performance(H_(2)O_(2)yield rate of 297.2μmol l^(−1)h^(−1))under visible light irradiation,which is approximately 9.8 times higher than that of pristine *** work deepens the understanding of the coordinated effect of structural defect and element doping of carbon nitride on the photocatalytic H_(2)O_(2)production performance,and provides new insight into the design of photocatalytic system for efficient production of H_(2)O_(2).

关键词： Photocatalysis H_(2)O_(2)evolution Sodium doping Nitrogen defect Metal-free catalyst

Prediction of Bond Dissociation Energy for Organic Molecules Based on a Machine-learning Approach

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Chinese Journal of Chemistry 2024年第17期42卷 1967-1974页

作者： Yidi liu yao li Qi Yang Jin-Dong Yang long Zhang Sanzhong luo Center of Basic Molecular Science(CBMS) Department of ChemistryTsinghua UniversityBeijing 100084China Haihe laboratory of Sustainable Chemical Transformations Tianjin 300192China Shanghai Institute of Organic Chemistry University of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200032China

Bond dissociation energy(BDE),which refers to the enthalpy change for the homolysis of a specific covalent bond,is one of the basic thermodynamic properties of *** is very important for understanding chemical reactivities,chemical properties and chemical ***,a machine learning-based comprehensive BDE prediction model was established based on the iBonD experimental BDE dataset and the calculated BDE dataset by *** et *** Structural and PhysicOChemical(D-SPOC)descriptors that reflected changes in molecules'structural and physicochemical features in the process of bond homolysis were designed as input features.

关键词： Bond dissociation energy Machine learning Molecular descriptors Prediction

Identif ication of a hypersensitive response core peptide of HrpZ and its role in increasing grape downy mildew resistance

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Horticultural Plant Journal 2024年第5期10卷 1112-1120页

作者： Zongbao Fan Xueqiang Guan Zhichang Zhang Yushuai Sun Fei Wang Huiru Chi Yuxin yao State Key laboratory of Crop Biology Collaborative Innovation Center of Fruit&Vegetable Quality and Efficient ProductionCollege of Horticulture Science and EngineeringShandong Agricultural UniversityTai'anShandong 271018China Shandong Academy of Grape/Shandong Technology Innovation Center of Wine Grape and Wine JinanShandong 250100China Zhichang Agricultural Science and Technology Development Co. Ltd.RizhaoShandong 276511China

Harpins play a key role in inducing disease resistance in crops,and identifying their core functional regions and establishing a system for their efficient expression would be very *** this study,large amounts of soluble fusion proteins of harpin HrpZ and its subpeptides were obtained via the optimized induction conditions(28℃ with 0.5 mmol·l^(-1) IPTG for 6 h)in Escherichia coli Bl21(DE3).Hypersensitive response(HR)assays demonstrated that the C-terminal 66 aa of HrpZ(HrpZ_C_2_2)elicited a strong HR in tobacco(Nicotiana benthamiana)and grape(Flame Seedless)***,treatment with HrpZ,and particularly HrpZ_C_2_2,significantly reduced the disease incidence and severity index of field vine leaves and those inoculated with downy *** determination of the physiological parameters indicated that HrpZ,and especially HrpZ_C_2_2,improved the photosynthesis-and chlorophyll fluorescence-related parameters,enhanced the activity of defense-related enzymes,including SOD,POD,CAT and PAl,and increased the H_(2)O_(2) ***,we efficiently expressed a core peptide of HrpZ and elucidated its strong ability to elicit a HR and resistance to downy *** research provides insight into understanding the structure and function of HrpZ and will advance the application of HrpZ_C_2_2 to increase the resistance of grapevine to downy mildew.

关键词： Grapevine Harpin HrpZ Prokaryotic expression Downy mildew Hypersensitive response

Exceptional activity of amino-modified rGO-immobilized PdAu nanoclusters for visible light-promoted dehydrogenation of formic acid

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Chinese Chemical letters 2024年第7期35卷 428-432页

作者： Yiyue Ding Qiuxiang Zhang lei Zhang Qilu yao Gang Feng Zhang-Hui lu Key laboratory of Energy Catalysis and Conversion of Nanchang College of Chemistry and Chemical EngineeringJiangxi Normal UniversityNanchang 330022China School of Chemistry and Chemical Engineering Nanchang UniversityNanchang 330031China

Formic acid(FA),which is obtainable through CO_(2)hydrogenation with green hydrogen or biomass conversion,has been used as a prospective liquid organic hydrogen carrier(lOHC)because of the abundant advantages of renewability,wide availability,stability,and high volumetric capacity(53 g H_(2)/l).The development of highly efficient catalytic systems to achieve enhanced catalytic activity is attractive but still ***,ultrafine and highly dispersed PdAu nanoclusters(NCs)anchored on amino-modified reduced graphene oxide(ArGO)were successfully synthesized via a facile impregnation-reduction method and applied as a catalyst toward formic acid dehydrogenation(FAD).Benefiting from the promoting effect of amino groups,the strain and ligand effect in the alloy,and the Mott–Schottky effect between PdAu NCs and ArGO,the resultant PdAu/ArGO affords an ultrahigh activity under visible light irradiation with an exceptional turnover frequency value of 10,699.5 h^(-1)at 298 K without any additives,more than 2.6times improvement than that under dark,which is the highest among all reported catalysts under the same *** study provides a green and convenient strategy for developing more efficient and sustainable FAD catalysts and promotes the effective utilization of FA as a prospective renewable lOHC.

关键词： Visible-light-enhanced Hydrogen production Formic acid Pd-Au Heterogeneous catalyst

CSPP1 stabilizes microtubules by capping both plus and minus ends

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Journal of Molecular Cell Biology 2024年第2期16卷 36-46页

作者： Zhikai Wang Wenwen Wang Shuaiyu liu Fengrui Yang Xu liu Shasha Hua lĳuan Zhu Aoqing Xu Donald lHill Dongmei Wang Kai Jiang Jennifer lippincott-Schwartz Xing liu Xuebiao yao MOE Key laboratory for Membraneless Organelles and Cellular Dynamics Center for Advanced Interdisciplinary Science and Biomedicine of IHMUniversity of Science and Technology of China School of Life SciencesHefei 230027China Anhui Key laboratory for Cellular Dynamics and Chemical Biology Hefei National Research Center for Interdisciplinary Sciences at the MicroscaleHefei 230027China Frontier Science Center for Immunology and Metabolism Medical Research InstituteWuhan UniversityWuhan 430071China Comprehensive Cancer Center University of AlabamaBirminghamAL 35233USA Janelia Research Campus Howard Hughes Medical InstituteAshburnVA 20147USA

Although the dynamic instability of microtubules(MTs)is fundamental to many cellular functions,quiescent MTs with unattached free distal ends are commonly present and play important roles in various events to power cellular ***,how these free MT tips are stabilized remains poorly ***,we report that centrosome and spindle pole protein 1(CSPP1)caps and stabilizes both plus and minus ends of static ***-time imaging of laser-ablated MTs in live cells showed deposition of CSPP1 at the newly generated MT ends,whose dynamic instability was concomitantly ***,MT ends in CSPP1-overexpressing cells were hyper-stabilized,while those in CSPP1-depleted cells were much more *** CSPP1-elicited stabilization of MTs was demonstrated to be achieved by suppressing intrinsic MT catastrophe and restricting ***,CSPP1-bound MTs were resistant to mitotic centromere-associated kinesin-mediated *** findings delineate a previously uncharacterized CSPP1 activity that integrates MT end capping to orchestrate quiescent MTs.

关键词： CSPP1 microtubule plus end minus end capping

Effects of zeolite imidazole frameworks on rice seedlings (Oryza sativa l.): Phytotoxicity, transformation, and bioaccumulation

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Journal of Environmental Sciences 2024年第10期144卷 15-25页

作者： Chaofa Chen Yongqi yao Chenghua Xing Yunyu Guo luyi Cai Jianfang Yan Xi-lin Wu Miaozhen Cai College of Geography and Environmental Science Zhejiang Normal UniversityJinhuaZhejiang 321004China College of Agriculture Jinhua PolytechnicJinhuaZhejiang 321007China

Zeolite imidazole frameworks(ZIFs),a class of the metal organic framework,have been extensively studied in environmental ***,their environmental fate and potential ecological impact on plants remain ***,we investigated the phytotoxicity,transformation,and bioaccumulation processes of two typical ZIFs(ZIF-8 and ZIF-67)in rice(Oryza sativa l.)under hydroponic ***-8 and ZIF-67 in the concentration of 50 mg/l decreased root and shoot dry weight maximally by 55.2%and 27.5%,53.5%and 37.5%,*** scanning electron microscopy(SEM)imaging combined with X-ray diffraction(XRD)patterns revealed that ZIFs on the root surface gradually collapsed and transformed into nanosheets with increasing cultivation *** fluorescein isothiocyanate(FITC)labeled ZIFs were applied to trace the uptake and translocation of ZIFs in *** results demonstrated that the transformed ZIFs were mainly distributed in the intercellular spaces of rice root,while they cannot be transported to culms and *** so,the Co and Zn contents of rice roots and shoots in the ZIFs treated groups were increased by 1145%and 1259%,145%and 259%,respectively,compared with the control *** findings suggested that the phytotoxicity of ZIFs are primarily attributed to the transformed ZIFs and to a less extent,the metal ions and their ligands,and they were internalized by rice root and increased the Co and Zn contents of *** study reported the transformation of ZIFs and their biological effectiveness in rice,highlighting the potential environmental hazards and risks of ZIFs to crop plants.

关键词： Zeolitic imidazolate frameworks (ZIFs) Rice(Oryza sativa l.) Phytotoxicity Transformed ZIFs ZIFs bioaccumulation

Pressure Distinguishes the Dual Emissions in Pseudohalide 2D Ruddlesden-Popper Perovskite Cs_(2)Pb(SCN)_(2)Br_(2)

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CCS Chemistry 2024年第7期6卷 1748-1756页

作者： Songhao Guo Yuhong Mao Congcong Chen yao Zhang Guoxiang Zhao Kejun Bu Qingyang Hu Haiming Zhu Guifu Zou Wenge Yang lingling Mao Xujie lü Center for High Pressure Science and Technology Advanced Research(HPSTAR) Shanghai Department of Chemistry Southern University of Science and TechnologyShenzhen Department of Chemistry Zhejiang UniversityHangzhou College of Energy Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow UniversitySuzhou

Two-dimensional(2D)Ruddlesden-Popper(RP)halide perovskites with diverse structures and properties have drawn increasing attention due to their promising optoelectronic ***,a new all-inorganic Cs_(2)Pb(SCN)_(2)Br_(2) has been reported that opens up new potential for the development of 2D RP ***,recent reports of unusual dual emissions and two-edge absorption in Cs_(2)Pb(SCN)_(2)Br_(2) have generated intense debate about its origin and remains ***,by combining continuous pressure tuning with in situ diagnostics,we have unambiguously revealed the underlying mechanisms that the 2D Cs_(2)Pb(SCN)_(2)Br_(2) exhibits an intrinsic blue emission at 2.66 eV and an absorption edge close to the emission *** the gradually formed CsPbBr_(3) is responsible for the green emission at 2.33 eV with the absorption shoulder at 2.41 ***,by fitting the temperature-dependent intensity of the intrinsic blue emission,we have determined the corrected value of exciton binding energy for 2D Cs_(2)Pb(SCN)_(2)Br_(2) to be 90 ***,an emission enhancement of 2.5 times is achieved in Cs_(2)Pb(SCN)_(2)Br_(2) under a mild pressure within 0.8 GPa,caused by the pressuresuppressed exciton-phonon *** work not only elucidates the origin of the dual emissions and two-edge absorption in Cs_(2)Pb(SCN)_(2)Br_(2),but it also provides a potential means to regulate and optimize the optoelectronic properties of 2D perovskites.

关键词： two-dimensional perovskite dual emissions two-edge absorption high pressure in situ characterization enhanced photoluminescence

Impacts of proppant distribution on development of tight oil reservoirs with threshold pressure gradient

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Petroleum Science 2024年第1期21卷 445-457页

作者： Ming Yue Wei-yao Zhu Fei-Fei Gou Tian-Ru Song Yu-Chun You Qi-Tao Zhang State Key laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development Beijing102206China School of Civil and Resource Engineering University of Science and Technology BeijingBeijing100083China

Field evidence indicates that proppant distribution and threshold pressure gradient have great impacts on well *** at the development of unconventional oil reservoirs in Triassic Chang-7 Unit,Ordos Basin of China,we presented an integrated workflow to investigate how(1)proppant placement in induced fracture and(2)non-linear flow in reservoir matrix would affect well productivity and fluid flow in the *** with our research before(Yue et al.,2020),here we extended this study into the development of multi-stage fractured horizontal wells(MFHWs)with large-scale complicated fracture *** integrated workflow is based on the finite element method and consists of simulation models for proppant-laden fluid flow,fracture flow,and non-linear seepage flow,*** results indicate that the distribution of proppant inside the induced cracks significantly affects the productivity of the *** we assign an idealized proppant distribution instead of the real distribution,there will be an overestimation of 44.98%in daily oil rate and 30.63%in cumulative oil production after continuous development of 1000 ***,threshold pressure gradient(TPG)also significantly affects the well performance in tight oil *** we simply apply linear Darcy’s law to the reservoir matrix,the overall cumulative oil production can be overrated by 77%after 1000 days of *** general,this research provides new insights into the development of tight oil reservoirs with TPG and meanwhile reveals the significance of proppant distribution and non-linear fluid flow in the production scenario design.

关键词： Proppant distribution Tight oil reservoir Multi-stage fractured horizontal well Threshold pressure gradient Moving boundary

Chiral helically grooved gold nanoarrows for concurrently enhancing oxygen and hydrogen evolution from electrochemical water splitting

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Science China Chemistry 2024年第11期67卷 3767-3776页

作者： lufei Huang Tao Wang Ying li Ping Wang Rui Tian Baowen Zhou lin yao China-UK low Carbon College Shanghai Jiao Tong University Electron Microscopy laboratory School of Physics Peking University State Key laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics School of Physics Peking University Key laboratory for Power Machinery and Engineering of Ministry of Education Research Center for Renewable Synthetic FuelSchool of Mechanical Engineering Shanghai Jiao Tong University

Electrocatalytic water splitting shows a tremendous promise for storing green and intermittent electricity into storable fuels,paving a sustainable way toward carbon neutrality. The exploration of a bifunctional electrocatalyst for simultaneously enhancing oxygen evolution reaction and hydrogen evolution reaction is at the core yet remains a grand challenge, especially operated in the same electrolyte. In this work, mesoscale gold nanoarrows with special chiral morphology are synthesized for electrocatalytic water splitting. In the same electrolyte of 1 M KOH aqueous solution, the as-designed chiral R-/l-helically grooved gold nanoarrows（R-/l-heli GNAs） demonstrated significantly enhanced performance in both hydrogen evolution reaction and oxygen evolution reaction with overpotentials of 186 and 355 m V at 10 m A cm-2, respectively, compared to the achiral counterpart. For oxygen evolution reaction, the performance is even comparable to commercial notable metal catalysts,i.e., RuO2, of which the overpotential is 310 m V under the same measured conditions. The spin-polarized conductive atomic force microscope（c-AFM）, finite-difference time-domain simulation, in combination with electrochemical investigations, show that the chirality of R-/l-heli GNAs makes a substantial contribution toward the remarkable performance by enhanced electric field distribution for hydrogen evolution reaction and by tuning the spin states of the electrons for oxygen evolution *** study presents an encouraging strategy for simultaneously promoting hydrogen evolution reaction and oxygen evolution reaction that operated in the same electrolyte by imparting chirality toward a mesoscale inorganic electrocatalyst, showing a grand promise for opening up a new way for electrocatalytic water splitting toward green hydrogen.

关键词： chirality electron spin water splitting hydrogen evolution reaction oxygen evolution reaction