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Chinese Journal of Chemistry 2024年第16期42卷 1860-1866页

作者： zhihao guo Guixia Liu Zheng Huang Chang-Kung Chuang Institute East China Normal UniversityShanghai 200062China The State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChineseAcademyof SciencesShanghai200032China School of Chemistry and Materials Science Hangzhou Institute of Advanced StudyUniversity of Chinese Academy of SciencesHangzhouZhejiang310024China

By rational modification of electronic and steric properties of pincer ligands,a Co/Fe dual catalyst system is developed for one-pot sequential Markovnikov alkyne hydrosilylation and stereoselective alkene *** protocol provides an atom-economical and efficient approach to trisubstituted(E)-alkenyl silanes from widely accessible terminal alkynes with high regio-and stereoselectivities under mild *** utility of this reaction was demonstrated by gram-scale synthesis and derivatization of bioactive *** radical clock and trapping experiments indicated that radical pathway might be operative in the alkene isomerization step.

关键词： Cobalt Dual catalysis Hydrosilylation Iron Isomerization Trisubstituted alkenyl silanes

Utilizing N-hydroxy-9-octadecenamide as a collector in flotation separation of bastnaesite and fluorite

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Journal of Rare Earths 2024年第8期42卷 1620-1628,I0008页

作者： zhihao guo Sultan Ahmed Khoso Mengjie Tian Wei Sun School of Minerals Processing and Bioengineering Central South UniversityChangsha410083China State Key Laboratory of Mineral Processing Beijing102600China Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources Wuhan430081China Key Laboratoryof Hunan Province for Cleanand Efficient Utilization of Strategic Calcium-containing Mineral Resources Central South UniversityChangsha410083China Department of Mining Engineering Mehran University of Engineering&TechnologyJamshoro76062Pakistan

Bastnaesite((Ce,La,Pr,Nd)CO_(3)F) is a significant light rare earth mineral found in nature,known for its fine-grained *** is commonly employed for the recovery of fine-grained bastnaesite *** serve as an essential flotation reagent that enhance the surface hydrophobicity of target minerals.A novel collector,N-hydroxy-9-octadecenamide(N-OH-9-ODA),was synthesised in this study.N-OH-9-ODA exhibits superior selectivity compared to the traditional collector oleic acid in the flotation separation of bastnaesite and *** experimental and co mputational results indicate that N-OH-9-ODA exhibits superior selectivity due to its higher adsorption affinity for bastnaesite surface compared to fluorite *** zeta potential and the binding energies of the Ce 3d peaks in the X-ray photoelectron spectrum(XPS) of bastnaesite surface exhibit significant ***,fluorite surface demonstrates minimal alterations in its zeta potential and the binding energies of the Ca 2p peaks in its XPS after its interaction with N-OH-9-ODA.

关键词： Bastnaesite Collector Hydroxamic acids N-hydroxy-9-octadecenamide Oleic acid Rare earths

A lightweight semantic segmentation algorithm integrating CA and ECA-Net modules

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Optoelectronics Letters 2024年第9期20卷 568-576页

作者： guo zhihao MA Dongmei LUO Xiaoyun School of Physics and Electronic Engineering Northwest Normal UniversityLanzhou 730070China

Aiming at the existing semantic segmentation process due to the loss of pixel features and the complexity of calculating too many parameters,which leads to unsatisfactory segmentation results and too long time,this paper proposes a lightweight semantic segmentation algorithm based on the fusion of multiple *** algorithm is based on the pyramid scene parsing network(PSPNet).Firstly,Mobile Net V2 network is chosen as the feature extraction network to construct the lightweight network structure.

关键词： Net network algorithm

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Revealing the potential of apparent critical current density of Li/garnet interface with capacity perturbation strategy

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Journal of Energy Chemistry 2023年第4期79卷 56-63页

作者： zhihao guo Xinhai Li Zhixing Wang Huajun guo Wenjie Peng Guangchao Li guochun Yan Qihou Li Jiexi Wang School of Metallurgy and Environment Central South UniversityChangsha 410083HunanChina Engineering Research Center of the Ministry of Education for Advanced Battery Materials Central South UniversityChangsha 410083HunanChina Key Laboratory of Value-added Metallurgy of Hunan Province Central South UniversityChangsha 410083HunanChina

Apparent critical current density(j_(Ac)^(a))of garnet all-solid-state lithium metal symmetric cells(ASSLSCs)is a fundamental parameter for designing all-solid-state lithium metal ***,how much the possible maximum apparent current density that a given ASSLSC system can endure and how to reveal this potential still require ***,a capacity perturbation strategy aiming to better measure the possible maximum j_(Ac)^(a)is proposed for the first *** garnet-based plane-surface structure ASSLSCs as an exemplification,the j_(Ac)^(a)is quite small when the capacity is dramatically *** a perturbed capacity of 0.001 mA h cm^(-2),the j_(Ac)^(a)is determined to be as high as 2.35 mA cm^(-2)at room *** investigation demonstrates that the capacity perturbation strategy is a feasible strategy for measuring the possible maximum j_(Ac)^(a)of Li/solid electrolyte interface,and hopefully provides good references to explore the critical current density of other types of electrochemical systems.

关键词： All-solid-state lithium batteries Li/solid electrolyte interface Apparent critical current density Interfacial state variation Capacity perturbation strategy

Hollow ZIF-67-derived Co@N-doped carbon nanotubes boosting the hydrogenation of phenolic compounds to alcohols

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Chinese Journal of Chemical Engineering 2024年第2期66卷 157-166页

作者： zhihao guo Jiuxuan Zhang Lanlan Chen Chaoqun Fan Hong Jiang Rizhi Chen State Key Laboratory of Materials-Oriented Chemical Engineering Nanjing Tech UniversityNanjing 211816China

The selective hydrogenation of highly toxic phenolic compounds to generate alcohols with thermal stability,environmental friendliness,and non-toxicity is of great ***,a series of Co-based catalysts,named Co@NCNTs,were designed and constructed by direct pyrolysis of hollow ZIF-67(HZIF-67)under H_(2)/Ar *** evolution of the catalyst surface from the shell layer assembled by ZIF-67-derived particles to the in situ-grown hollow nitrogen-doped carbon nanotubes(NCNTs)with certain length and density is achieved by adjusting the pyrolysis atmosphere and *** to the synergistic effects of in situ-formed hollow NCNTs,well-dispersed Co nanoparticles,and intact carbon matrix,the as-prepared Co@NCNTs-0.10-450 catalyst exhibits superior catalytic performance in the hydrogenation of phenolic compounds to *** turnover frequency value of Co@NCNTs-0.10-450is 3.52 h^(-1),5.9 times higher than that of Co@NCNTs-0.40-450 and 4.5 times higher than that of Co@NCNTs-0.10-550,exceeding most previously reported non-noble metal *** findings provide new insights into the development of non-precious metal,efficient,and cost-effective metal-organic framework-derived catalysts for the hydrogenation of phenolic compounds to alcohols.

关键词： Phenolic compounds Hollow ZIF-67 pyrolysis Nitrogen-doped carbon nanotubes Reduction Multiphase reaction Catalysis

基于最优控制策略的建筑机器人的危险避障路径规划

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科学技术创新 2025年第2期 68-71页

作者：郭志豪李佳佳王雪科北京城建一建设发展有限公司北京

建筑施工中常在危险环境下进行。为保证施工安全,常采用建筑机器人代替施工人员完成某些危险的任务,例如危险环境下的搬运任务。路径规划是建筑机器人实现运动完成任务的基础,建筑机器人在运动过程中需避开危险障碍物。本文研究了建筑... 详细信息

建筑施工中常在危险环境下进行。为保证施工安全,常采用建筑机器人代替施工人员完成某些危险的任务,例如危险环境下的搬运任务。路径规划是建筑机器人实现运动完成任务的基础,建筑机器人在运动过程中需避开危险障碍物。本文研究了建筑机器人的危险避障路径规划问题,提出了一种基于最优控制策略的路径规划算法,可保证建筑机器人在实现危险避障的条件下以耗能最小的路径完成运动任务。实验仿真结果说明了所提出的基于最优控制策略的建筑机器人的危险避障路径规划算法的有效性。

关键词：建筑机器人危险避障路径规划最优控制

UV-light-assisted synthesis of CeB_(6)@Ag nano-trees for SERS application

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Journal of Rare Earths 2023年第1期41卷 149-156页

作者： Xiaoyu Geng Fengquan Zhang zhihao guo Jinqiannan Zhang Yixiao Gao Chenjie Gu Xiang Shen Jun Zhou The Research Institute of Advanced Technology Ningbo UniversityNingbo 315211China Institute of Photonics Ningbo UniversityNingbo 315211China China Science and Technology Exchange Center Beijing 100045China

The conventional methods of using surfactants to synthesize noble metal nanoparticles usually introduce residues on the surface,which inevitably decreases nanoparticles’ surface enhanced Raman scattering(SERS) ***,we propose a surfactant-free and feasible approach of preparing cerium hexaboride-Ag nano-trees hybrids(CeB_(6)@Ag nano-trees) as the SERS ***,the CeB_(6)was synthesized by a one-pot ionothermal ***,the CeB_(6)powder and silver nitrate were dispersed in an aqueous ***,the Ag+was reduced by the UV-light assisted photoreaction and deposited on the surface of the CeB_(6).The SERS performance of the CeB_(6)@Ag nano-trees was evaluated by using the Rhodamine 6 G as the Raman *** shows that CeB_(6)@Ag nano-trees exhibit good SERS sensitivity with the enhancement factor of 2.45 × 10^(7) and detection limit of 10^(-10) mol/***,uniformity evaluation of the SERS signal intensity on the substrate also shows that relatively good relative standard deviation values of 12.6%(Raman peak@612 cm^(-1)) and 14.1%(Raman peak@1652 cm^(-1))can be ***,finite element simulation evidences that excellent SERS performance of the CeB_(6)@Ag nano-trees is produced by the strong coupled localized surface plasmon resonance generated under the Raman laser irradiation.

关键词： Surface enhanced Raman scattering UV-Light assisted photosynthesis CeB_(6)@Ag nano-trees Electromagnetic enhancement Rare earths

Effect of Organic Additives on the Performance of Nano-sized Ru-Zn Catalyst

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Chinese Journal of Chemistry 2011年第2期29卷 369-373页

作者： Sun Haijie Chert zhihao guo Wei Zhou Xiaoli Liu Zhongyi Liu Shouchang Department of Chemistry Zhengzhou University Zhengzhou Henan 450001 China

A novel Ru-Zn catalyst was prepared by coprecipitation. The catalyst was characterized by XRF, XRD and TEM. The effects of organic additives on the performance of the Ru-Zn catalyst for benzene selective hydrogenation to cyclohexene were investigated. The results showed that the catalyst was composed of Ru and Zn in molar ratio of 33.8 ： 1, and the most probable value of the Ru crystallite size in the catalyst was 5.1 nm. The modification of Ru with Zn and the small size effect were the main cause why the catalyst exhibited the high activity and the excellent cyclohexene selectivity. When PEG （polyethylene glycol） was used as an additive, the activity of the catalyst decreased, and the cyclohexene selectivity increased with the increase of the PEG molecular weight. With the addition of PEG-20000, a cyclohexene selectivity of 78.9% at a benzene conversion of 68.7% and a maximum cyclohexene yield of 61.4% were obtained. With diethanolamine and triethanolamine as additives, cyclohexene yields were as high as 58.9% and 58.2%, respectively.

关键词： benzene hydrogenation ruthenium zinc cyclohexene

Therapeutic sponge prevents postoperative breast cancer recurrence by sustainably dissociating into CD44-targeted nanoplatform

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Nano Research 2024年第3期17卷 1792-1803页

作者： Junhui Sui Mingda Zhao zhihao guo Jiafeng Li Jie Chen Hongli Chen Jie Liang Yong Sun Xingdong Zhang Yujiang Fan National Engineering Research Center for Biomaterials Sichuan UniversityChengdu 610064China Beijing Tide Pharmaceutical Co. Ltd.Beijing 100176China The Key Laboratory of Biomedical Material School of Life Science and TechnologyXinxiang Medical UniversityXinxiang 453003China Coal Mining Branch China Coal Research InstituteBeijing 100028China School of Ophthalmology&Optometry Eye HospitalWenzhou Medical UniversityWenzhou 325027China

Locoregional recurrence and distant metastasis of breast cancer still pose a significant risk for patients’*** address the clinical challenge,functional absorbable sponges(HA-SH/PP-Dox/Lap/COL I(HCNPs))were constructed by biomimetic extracellular matrix of collagen I/hyaluronic acid complex conjugated with doxorubicin/lapatinib(Dox/Lap)-loaded *** HCNPs sponge exhibited excellent clotting ability and blood absorption ***,Dox/Lap-loaded nanoparticles were synchronously endowed with a large number of oligo hyaluronic acid segments after degradation,which thus enhanced the ability of targeting into CD44-overexpressed tumor *** implantable HCNPs sponge in resected cavity of postoperative 4T1 models inhibited the spread of scattered tumor cells by absorbing the inevitable *** importantly,CD44 targeted nanoparticle with suitable Dox/Lap proportion continuously released from sponge to kill tumor cells of surrounding HCNPs and those remaining at surgical margin,thus prevented local recurrence as well as distant ***,the functional HCNPs sponge might provide a safer and more effective strategy for postoperative treatment of cancer.

关键词： therapeutic sponge scattered tumor cells recurrence and metastasis CD44-targeted nanoparticles breast cancer

Transcription factors AS1 and AS2 interact with LHP1 to repress KNOX genes in Arabidopsis

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Journal of Integrative Plant Biology 2016年第12期58卷 959-970页

作者： Zhongfei Li Bin Li Jian Liu zhihao guo Yuhao Liu Yan Li Wen-Hui Shen Ying Huang Hai Huang Yijing Zhang Aiwu Dong State Key Laboratory of Genetic Engineering International Associated Laboratory of CNRS-Fudan-HUNAU on Plant Epigenome Research Collaborative Innovation Center for Genetics and Development Institute of Plant Biology School of Life Sciences Fudan University Shanghai 200433 China National Laboratory of Plant Molecular Genetics Shanghai Institute of Plant Physiology and Ecology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200032 China National Center for Protein Science Shanghai State Key Laboratory of Molecular Biology Shanghai State Key Laboratory of Molecular Andrology Institute of Biochemistry and Cell Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 201203 China Institut de Biologie Moléculaire des Plantes du CNRS Université de Strasbourg 12 rue du General Zimmer 67084 Strasbourg Cedex France

Polycomb group proteins are important repressors of numerous genes in higher eukaryotes. However, the mechanism by which Polycomb group proteins are recruited to specific genes is poorly understood. In Arabidopsis, LIKE HETEROCHROMATIN PROTEIN 1 （LHP1）, also known as TERMINAL FLOWER 2, was originally proposed as a subunit of polycomb repressive complex 1 （PRC1） that could bind the tri-methylated lysine 27 of histone H3 （H3K27me3） established by the PRC2. In this work, we show that LHP1 mainly functions with PRC2 to establish H3K27me3, but not with PRC1 to catalyze monoubiquitination at lysine 119 of histone H2A. Our results show that complexes of the transcription factors ASYMMETRIC LEAVES 1 （AS1） and AS2 could help to establish the H3K27me3 modification at the chromatin regions of Class-I KNOTTED＇t-like homeobox （KNOX） genes BREVIPEDICELLU5 and KNAT2 via direct interactions with LHP1. Additionally, our transcriptome analysis indicated that there are probably more common target genes of AS1 and LHP1 besides Class-I KNOX genes during leaf development in Arabidopsis.

关键词： Arabidopsis thaliana ASYMMETRIC LEAVES 1