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Pt-surface oxygen vacancies coupling accelerated photo-charge extraction and activated hydrogen evolution

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Nano Research 2023年第4期16卷 4736-4741页

作者： fangxu dai Mingming Zhang Mingzhong Mi Zhenjiang Li Jun Xing Lei Wang Key Laboratory of Eco-chemical Engineering Ministry of EducationCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042China College of Environment and Safety Engineering Qingdao University of Science and TechnologyShandong Engineering Research Center for Marine Environment Corrosion and Safety ProtectionQingdao 266042China

Semiconductors-based heterogeneous photocatalytic water splitting has been extensively studied,but it still remains challenging to accelerate the separation of electron-hole pairs and facilitate the reaction kinetics.Here we report a general strategy to fabricate highly efficient Pt/TiO_(2)photocatalyst by coupling the Pt co-catalysts and surface oxygen vacancies(VO)of TiO_(2).TiO_(2)was pre-modified with alkali or alkaline earth metals ion solutions,which produce a large number of surface hydroxyl on TiO_(2).Subsequently,the photodeposited Pt sub-nanoparticles substitute surface hydroxyl and induce surface VO on TiO_(2).The coupling of Pt and surface VO on TiO_(2)can accelerate the extraction of photo-charges through the interaction of Pt-VO-Ti bonds and reduce the hydrogen evolution barrier,thereby promoting the photocatalytic activity.The synthesized Pt-VO-TiO_(2)sample exhibits a photocatalytic hydrogen evolution activity as high as 1.5 L·g^(−1)·h^(−1),which is 2.2 times that of traditional Pt/TiO_(2).Our findings indepth understand the synergistic effect of co-catalysts and defects on photocatalysis and open up new possibilities for achieving robust photocatalytic water splitting.

关键词： oxygen vacancies co-catalyst surface hydroxyl photocatalytic hydrogen evolution reaction(HER)

Valence state effect of Cu on photocatalytic CO_(2)reduction

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Materials Reports(Energy) 2023年第4期3卷 39-45页

作者： fangxu dai Mingming Zhang Zhenjiang Li Jun Xing Lei Wang School of Pharmacy Jining Medical UniversityRizhao276800PR China Key Laboratory of Eco-chemical Engineering Ministry of EducationCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao266042PR China College of Sino-German Science and Technology Qingdao University of Science&TechnologyQingdao266042PR China College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao266042PR China College of Environment and Safety Engineering Qingdao University of Science and TechnologyShandong Engineering Research Center for Marine Environment Corrosion and Safety ProtectionQingdao266042PR China

Copper(Cu)is extensively employed in photocatalytic CO_(2)reduction reactions for the production of high-value products.The valence state of transition metals plays a pivotal role in influencing the catalytic process.However,due to the complex valence state changes of Cu in the CO_(2)reduction reaction,research on its valence state effect is lacking.The current work is to prepare a series of TiO_(2)/CuX with stable Cu valence composition using different copper halides(CuX and CuX_(2),X=Br or Cl)as precursors.The results show that the CuBr_(2)loading leads to Cu^(+)/Cu^(2+) mixed cocatalyst and exhibits the highest activity for CO_(2)photoreduction.The CH4 evolution rate of the TiO_(2)/CuBr_(2)catalyst is as high as 100.59μmol h^(-1)g^(-1),which is 6.6 times that of pristine TiO_(2).The CH4 selectivity reaches 77%.The enhanced catalytic activity and selectivity can be ascribed to the efficient surface adsorption,activation,excellent carrier separation,and transfer ofCu^(+)/Cu^(2+) mixed cocatalyst.Our findings provide a reference for designing highly active Cu-based photocatalysts.

关键词： Valence state Cu Photocatalytic CO_(2)reduction

中西部地区乡村发展的不同样态及振兴逻辑——基于农业转移人口市民化视角

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西北民族大学学报（哲学社会科学版） 2024年第1期 114-124页

作者：张方旭陕西师范大学社会学系陕西西安710000

立足于中西部乡村发展实际,可以将中西部乡村划分为内生资源丰富、发展潜力较好的城郊乡村及内生资源薄弱、发展基础较差的偏远乡村。探讨不同类型中西部乡村的振兴路径与逻辑对理解我国乡村振兴整体发展图景具有重要作用。乡村产业及... 详细信息

立足于中西部乡村发展实际,可以将中西部乡村划分为内生资源丰富、发展潜力较好的城郊乡村及内生资源薄弱、发展基础较差的偏远乡村。探讨不同类型中西部乡村的振兴路径与逻辑对理解我国乡村振兴整体发展图景具有重要作用。乡村产业及乡村中人的发展是乡村振兴的最终落点也是解决中西部乡村发展困境的最主要突破口,对于内生条件较好的中西部城郊乡村的振兴思路是充分挖掘与有效利用其内生资源,发展特色乡村产业,实现乡村人口的就地城镇化与乡村现代化协同发展;而对于内生资源薄弱的中西部偏远乡村,政府应减少其产业性、生产性投入,将有限投入放在提升乡村人口的市民化能力方面。

关键词：乡村振兴市民化现代化就地城镇化市民化能力

Highly crystalline,highly stable n-type ultrathin crystalline films enabled by solution blending strategy toward organic single-crystal electronics

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Chinese Chemical Letters 2024年第1期35卷 321-325页

作者： Yang Liu Shuyu Li Yihan Zhang Xiaoting Zhu fangxu Yang Fei Jiao Wenping Hu Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of ScienceTianjin UniversityTianjin 300072China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

The development of n-type semiconductor is still far behind that of p-type semiconductor on account of the challenges in enhancing carrier mobility and environmental stability.Herein,by blending with the polymers,n-type ultrathin crystalline thin film was successfully prepared by the method of meniscus-guided coating.Remarkably,the n-type crystalline films exhibit ultrathin thickness as low as 5 nm and excellent mobility of 1.58 cm^(2) V^(-1) s^(-1),which is outstanding in currently reported organic n-type transistors.Moreover,the PS layer provides a high-quality interface with ultralow defect which has strong resistance to external interference with excellent long-term stability,paving the way for the application of n-type transistors in logic circuits.

关键词： n-type organic field effect transistors Ultrathin film High-performance Composites

Extracellular Disintegration of Viral Proteins as an Innovative Strategy for Developing Broad-Spectrum Antivirals Against Coronavirus

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CCS Chemistry 2024年第2期6卷 487-496页

作者： Ke Sun Zhe Ding Xiaoying Jia Haonan Cheng Yingwen Li Yan Wu Zhuoyu Li Xiaohua Huang fangxu Pu Entao Li Guiyou Wang Wei Wang Yun Ding Gary Wong Sandra Chiu Jiaming Lan Aiguo Hu Shanghai Key Laboratory of Advanced Polymeric Materials School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237 CAS Key Laboratory of Molecular Virology&Immunology Chinese Academy of SciencesShanghai 200031 University of the Chinese Academy of Sciences Beijing 100049 State Key Laboratory of Virology Center for Biosafety Mega-ScienceWuhan Institute of VirologyChinese Academy of SciencesWuhan 430071 Division of Life Sciences and Medicine University of Science and Technology of ChinaHefeiAnhui 230027 Department of Clinical Laboratory The First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhui 230001

The coronavirus disease 2019(COVID-19)pandemic,caused by severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),has claimedmillions of lives and caused innumerable economic losses worldwide.Unfortunately,state-of-the-art treatments still lag behind the continual emergence of new variants.Key to resolving this issue is developing antivirals to deactivate coronaviruses regardless of their structural evolution.Here,we report an innovative antiviral strategy involving extracellular disintegration of viral proteins with hyperanion-grafted enediyne(EDY)molecules.The core EDY generates reactive radical species and causes significant damage to the spike protein of coronavirus,while the hyperanion groups ensure negligible cytotoxicity of the molecules.The EDYs exhibit antiviral activity down to nanomolar concentrations,and the selectivity index of up to 20,000 against four kinds of human coronavirus,including the SARS-CoV-2 Omicron variant,suggesting the high potential of this new strategy in combating the COVID-19 pandemic and a future“disease X.”

关键词： enediyne broad spectrum antiviral protein disintegration coronavirus polyanions

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化工过程含氧有机气体化学脱氧研究进展

化工进展 2024年第2期43卷 903-912页

作者：张长胜文松赵晋翀卢方旭姜杰化学品安全全国重点实验室山东青岛266100 中石化安全工程研究院有限公司山东青岛266100

进入21世纪,随着我国化工生产装置的不断投产,有更多化工过程产生了含氧有机气体,脱氧以实现其本质安全化处置成为一项重点课题。然而,由于场景多变、组成复杂以及脱氧深度需求不一等因素,脱氧技术发展仍有诸多问题。本文立足作者长期... 详细信息

进入21世纪,随着我国化工生产装置的不断投产,有更多化工过程产生了含氧有机气体,脱氧以实现其本质安全化处置成为一项重点课题。然而,由于场景多变、组成复杂以及脱氧深度需求不一等因素,脱氧技术发展仍有诸多问题。本文立足作者长期脱氧技术研究工作经验,概述了当前化工过程含氧有机气体化学脱氧技术的应用情况以及最新研究进展。基于不同场景下的脱氧需求,分析了各类化学脱氧技术适用性及技术竞争力。针对化工生产过程形成的高含氧、大通量、连续化含氧气体脱氧,指出催化脱氧具有流程简单、可操作性强、脱氧效果好等特点,在当前实际工业应用中更具竞争力,并从工艺、催化剂等方面进行了综合分析。基于当前各化学脱氧方式特点,指出含氧有机气体深度脱氧、高含氧有机气体脱氧以及温和脱氧等技术具有广阔市场需求,是未来脱氧技术发展的重要方向。

关键词：化工含氧气体化学脱氧技术工业化

基于直驱机床的航空整体叶轮加工效率优化方法研究

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航空制造技术 2024年第7期67卷 61-67,76页

作者：江小辉胡方旭罗超林志俭上海理工大学上海210016 阿帕斯数控机床制造(上海)有限公司上海201306

为解决航空叶轮在复杂五轴联动加工过程中的效率和精度控制难题,本文基于直驱机床围绕加工参数对表面粗糙度和加工时间的影响进行了深入分析。首先通过与传统机床进行加工对比,证明了直驱机床的精度与速度方面的优势;其次针对原点坐标... 详细信息

为解决航空叶轮在复杂五轴联动加工过程中的效率和精度控制难题,本文基于直驱机床围绕加工参数对表面粗糙度和加工时间的影响进行了深入分析。首先通过与传统机床进行加工对比,证明了直驱机床的精度与速度方面的优势;其次针对原点坐标的研究揭示了原点位置对加工效率的影响,尤其是当原点接近A、C轴中心时,加工效率显著提高;最后通过正交试验法研究了转速、每齿进给量、切宽这3个关键因素,并发现每齿进给量是影响表面粗糙度的主导因素,其次是切宽,而转速的影响较小。在保证粗糙度小于1.6μm的前提下,以转速20000 r/mim、每齿进给量0.03 mm、切宽0.6 mm的参数组合获得最优结果。基于优化的工艺参数不仅提升了加工效率,节约了43.3%的加工时间,还确保了加工质量,为航空叶轮的精密加工提供了重要的技术参考,同时为基于直驱机床的复杂零件高效加工提供实践指导和理论依据。

关键词：整体叶轮薄壁零件直驱机床加工效率表面粗糙度工艺参数

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中医药治疗肾性贫血的理论与实践

中国中医药现代远程教育 2024年第12期22卷 176-178页

作者：窦方旭上海中医药大学附属岳阳中西医结合医院肾病内科上海200473

肾性贫血(RA)是慢性肾衰竭患者最常见的临床表现之一,是由促红细胞生成素(EPO)绝对或相对缺乏,以及红细胞寿命及生成受尿毒症毒素影响而发生的贫血。RA的发病率随慢性肾脏病的进展而增加,影响患者的日常生活质量,增加心血管事件及死亡... 详细信息

肾性贫血(RA)是慢性肾衰竭患者最常见的临床表现之一,是由促红细胞生成素(EPO)绝对或相对缺乏,以及红细胞寿命及生成受尿毒症毒素影响而发生的贫血。RA的发病率随慢性肾脏病的进展而增加,影响患者的日常生活质量,增加心血管事件及死亡的风险。中医药在促进内源性EPO产生、改善铁代谢、抑制炎症反应及氧化应激、改善营养状态等方面具有较好疗效,且不良作用少。现作者对近年RA的中医药治疗做一综述,以期为临床治疗提供参考。

关键词：慢性肾衰竭肾性贫血中医药疗法综述

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群智创新设计研究现状与进展

计算机集成制造系统 2024年第2期30卷 407-423页

作者：罗仕鉴张德寅邵文逸沈诚仪郭和睿卢杨钟方旭浙江大学工业设计系浙江杭州310027 浙江大学计算机辅助设计与图形学国家重点实验室浙江杭州310027

人工智能时代下,群智创新设计是将创新设计同下一代互联网、人工智能、大数据、区块链等新兴数字技术结合,来解决社会复杂设计问题的综合创新手段。从计算机科学、设计学和社会学的角度出发,通过文献调研的方式,探讨了不同创新阶段的代... 详细信息

人工智能时代下,群智创新设计是将创新设计同下一代互联网、人工智能、大数据、区块链等新兴数字技术结合,来解决社会复杂设计问题的综合创新手段。从计算机科学、设计学和社会学的角度出发,通过文献调研的方式,探讨了不同创新阶段的代表性研究、社会创新范式的衍变和群体智慧的发展;分析了群智创新设计的研究现状,系统地提出群智创新设计的体系内容,包括本体—行为—价值三层次理论模型、群智创新主体、群智创新环节、关键技术及研究范围。最后,针对群智计算与群智创新设计的融合发展路径,提出群智创新设计未来的发展趋势。研究对推动人工智能时代下创新设计的发展具有重要意义。

关键词：创新设计群智创新群体智能设计知识