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Apically guiding electron/mass transfer reaction induced by Ag/FeN_(x)Mott-Schottky effect within a hollow star reactor toward high performance zinc-air batteries

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Journal of Energy Chemistry 2024年第8期95卷 106-116,I0004页

作者： Kaixiang Shi Kaixin Wang Tong Li Junhao Li Jie Ren Xu Li yonggang min Zhouguang Lu Wei Tan Quanbing Liu Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center(Rongjiang Laboratory) Guangdong University of TechnologyJieyang 515200GuangdongChina Guangzhou Key Laboratory of Clean Transportation Energy Chemistry Guangdong Provincial Key Laboratory of Plant Resources BiorefinerySchool of Chemical Engineering and Light IndustryGuangdong University of TechnologyGuangzhou 510006GuangdongChina Key Laboratory of Electrochemical Energy Storage and Energy Conversion of Hainan Province School of Chemistry and Chemical EngineeringHainan Normal UniversityHaikou 571158HainanChina School of Materials and Energy Guangdong University of TechnologyGuangzhou 510006GuangdongChina Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055GuangdongChina

The disparity in the transfer of carriers(electrons/mass)during the reaction in zinc-air batteries(ZABs)results in sluggish kinetics of the oxygen reduction reaction(ORR)and oxygen evolution reaction(OER),along with elevated overpotentials,thereby imposing additional constraints on its ***,the pre-design and target-development of inexpensive,high-performance,and long-term stable bifunctional catalysts are urgently *** this work,an apically guiding dual-functional electrocatalyst(Ag-FeN_(x)-N-C)was prepared,in which a hierarchical porous nitrogen-doped carbon with three-dimensional(3D)hollow star-shaped structure is used as a substrate and high-conductivity Ag nanoparticles are coupled with iron nitride(FeN_(x))*** calculations indicate that the Mott-Schottky heterojunction as an inherent electric field comes from the two-phase bound of Ag and FeN_(x),of which electron accumulation in the FeN_(x)phase region and electron depletion in the Ag phase region promote orientated-guiding charge *** effective modulation of local electronic structures felicitously reforms the d-band electron-group distribution,and intellectually tunes the masstransfer reaction energy barriers for both ORR/***,the hollow star-s haped hierarchical porous structure provides an apical region for fast mass *** results show that the halfwave potential for ORR is 0.914 V,and the overpotential for OER is only 327 mV at 10 mA cm^(-2).A rechargeable ZAB with Ag-FeN_(x)-N-C as the air cathode demonstrates long-term cycling performance exceeding 1500 cycles(500 h),with a power density of 180 mW cm^(-2).Moreover,when employing AgFeN_(x)-N-C as the air cathode,flexible ZABs demonstrate a notable open-circuit voltage of 1.42 V and achieve a maximum power density of 65.6 mW cm^(-2).Ag-FeN_(x)-N-C shows guiding electron/mass transfer route and apical reaction microenvironment for the electrocatalyst architecture in the explo

关键词： Hollow star structure Mott-Schottky effect Apically guiding effect Bifunctional catalysis Zinc-air batteries

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Machine learning will revolutionize perovskite solar cells

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The Innovation 2024年第3期5卷 13-14页

作者： Ziming Chen Shuang Pan Jing Wang yonggang min Yihuang Chen Qifan Xue State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and DevicesSchool of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510640China College of Chemistry and Materials Engineering Wenzhou UniversityWenzhou 325035China School of Materials and Energy Guangdong University of TechnologyGuangzhou 510006China

With the emergence of ChatGPT and its rapid iteration speed,artificial intelligence(AI)has undoubtedly become the driving force behind a new wave of technological *** more than half a century of development,AI has become akin to the steam engine of the Industrial Revolution,propelling humanity into the era of *** global industrial chain has also recognized that AI technology will spearhead a new wave of industrial transformation and *** learning(ML),driven by data,abstracts real-life problems into mathematical problems and solves them using *** is currently the mainstream method for addressing many AI *** solar cells(PSCs)are currently the focus of researchers around the world due to their high efficiency,low cost,and simple manufacturing *** are considered the most promising third-generation solar cell for *** 2011,the United States proposed the Materials Genome Initiative(MGI).The main idea is to utilize the“trinity”approach of computing,data,and experiments to transform the conventional“trial and error”model of materials research and development,which relies heavily on experience and experimentation,in order to enhance the quality,speed of discovery,development,production,and application of new *** by the MGI,research on the combination of ML with great application potential and rapidly developing PSC(ML&PSC)emerged(Figure 1).

关键词： utilize Figure doubt

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聚乳酸基相变材料研究进展

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现代塑料加工应用 2024年第3期36卷 44-47页

作者：招兆璋黄锦涛闵永刚广东工业大学材料与能源学院广东广州510006

综述了聚乳酸基相变材料的多种制备工艺,包括溶剂蒸发法、气凝胶成型法、混合复合挤出法、静电纺丝法和3D打印法。介绍了聚乳酸基相变材料在建筑、纺织品、药用抑菌和食品包装等领域的应用,并对聚乳酸基相变材料的发展趋势进行了展望。

关键词：聚乳酸基相变材料制备工艺应用

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化学亚胺法催化制备性能优异的聚酰亚胺纤维

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功能材料 2024年第7期55卷 7008-7014页

作者：隋金龙苏敬涛赵晓君李清玲闵永刚谭婉怡广东工业大学材料与能源学院广州510006

提高本征性高分子纤维材料的热稳定性和力学性能,是目前先进纤维材料的研究热点。聚酰亚胺是一种高性能特种高分子材料,由于其共轭及苯环堆叠作用,具有优异的力学性能和热稳定性。将4,4′-二氨基二苯醚(ODA)、对苯二胺(PDA)两种二胺与3,... 详细信息

提高本征性高分子纤维材料的热稳定性和力学性能,是目前先进纤维材料的研究热点。聚酰亚胺是一种高性能特种高分子材料,由于其共轭及苯环堆叠作用,具有优异的力学性能和热稳定性。将4,4′-二氨基二苯醚(ODA)、对苯二胺(PDA)两种二胺与3,3′,4,4′-联苯四甲酸二酐(BPDA)聚合形成聚酰胺酸溶液(PAA),使用不同种类的吡啶与丙酸酐混合制备出一系列浓度梯度混合液引入到PAA中,采用湿法纺丝和化学亚胺化法制备出聚酰亚胺纤维并对其微观结构和性能进行研究。结果表明,当4-甲基吡啶质量分数为4%(质量分数),n(PAA)∶n(丙酸酐)=1∶3时的聚酰亚胺纤维微观结构为标准的圆柱状,其拉伸强度达到1.91 GPa,在热失重为5%时的温度高达533.3℃,表现出良好的热稳定性能和力学性能。

关键词：聚酰亚胺纤维湿法纺丝化学亚胺化热稳定性能形貌结构力学性能

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塑料制品用水性聚氨酯改性涂层研究进展

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现代塑料加工应用 2024年第3期36卷 40-43页

作者：郑新波黄锦涛张桂珍闵永刚广东工业大学材料与能源学院广东广州510006 华南理工大学机械与汽车工程学院广东广州510641

综述了塑料制品用水性聚氨酯(WPU)涂层的改性方法,并对其发展趋势进行了展望。

关键词：水性聚氨酯涂层改性方法

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通过掺杂柔性二胺单体增强聚酰亚胺性能:分子动力学模拟

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化学通报 2024年第5期87卷 605-611页

作者：刘恒刘屹东陈伟鹏崔婷婷闵永刚广东工业大学材料与能源学院广州510006

聚酰亚胺(PI)被视为一类以其卓越性能而闻名的高性能聚合物材料。传统PI材料的一个关键问题是其熔体的加工性能较差。在本研究中,设计了一种新的聚酰亚胺单体Am-Di,其特点是由氮原子连接的苯环组成的柔性结构。对Am-Di掺杂到PI中对其玻... 详细信息

聚酰亚胺(PI)被视为一类以其卓越性能而闻名的高性能聚合物材料。传统PI材料的一个关键问题是其熔体的加工性能较差。在本研究中,设计了一种新的聚酰亚胺单体Am-Di,其特点是由氮原子连接的苯环组成的柔性结构。对Am-Di掺杂到PI中对其玻璃化转变温度、均方位移、力学性能和相对介电常数等性质影响的研究。结果表明,在PI体系中掺杂新型二胺可以加速聚酰亚胺分子链的运动,从而降低PI体系的玻璃化转变温度。在Am-Di掺杂量为20%的情况下,PI-20%表现出最高的弹性模量(4.505GPa),比纯PI高1.2倍。此外,随着掺杂比例的增加,PI的相对介电常数降低。这些发现表明,Am-Di的掺杂对PI材料性能具有积极影响,特别是在增强机械性能和调控电气性能方面,为进一步改进PI材料的设计和应用提供了有价值的见解.

关键词：聚酰亚胺分子动力学模拟力学性质相对介电常数

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“新工科”背景下计算材料学课程教学的改革与实践

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武汉轻工大学学报 2024年第1期43卷 115-119页

作者：崔婷婷黄锦涛闵永刚广东工业大学材料与能源学院广州510006

为满足“新工科”建设的要求,对计算材料学课程进行教学改革与实践。通过理论实验的一体化结合、引入面向实际应用的实验设计以及过程化的考核方式来提升教学效果,使学生能够借助计算模拟来分析和解决不同尺度下的材料学问题。改革实践... 详细信息

为满足“新工科”建设的要求,对计算材料学课程进行教学改革与实践。通过理论实验的一体化结合、引入面向实际应用的实验设计以及过程化的考核方式来提升教学效果,使学生能够借助计算模拟来分析和解决不同尺度下的材料学问题。改革实践措施提高了学生自主思考、团队协作和创新思维的能力,建立起符合“新工科”建设需要的人才培养模式,可以作为多学科交叉和融合式教学的新范式。

关键词：计算材料学课程改革面向实际应用过程化考核

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Improvement of CO2 capture performance of calcium-based absorbent modified with palygorskite

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Chinese Journal of Chemical Engineering 2016年第9期24卷 1283-1289页

作者： Liyuan Shan Hui Li Binglu Meng Youhai Yu yonggang min College of Material and mineral Resource Xi'an University of Architecture and TechnologyXi'an 710055China Shaanxi Techno-Institute of Recycling Economy Xi'an 710055China Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Science Xi'an 710119China

Limestone can be used for CO_2 capture and sequestration(CCS) in flue gas effectively. However, its CCS capability will dramatically decline after several cycles due to the surface "sintering". In this work, the limestone was modified with palygorskite to reduce sintering phenomenon between the absorbent particles during the CCS process and the carbonation rate of the limestone can be enhanced effectively. Palygorskite is a natural mineral with nano-fibrous structure which can reduce the mutual contact of limestone particles during the CCS process. The results were detected by TGA, SEM, MIP, FTIR and particle size analyzer respectively. The best CO_2 capture performance of modified absorbent was 13.11% improvement with only 5 wt% palygorskite added during the CCS process after 15 cycles compared with natural absorbent. It was found that excellent microscopic structures of absorbent modified with palygorskite was created, and the surface sintering was postponed leading to CO_2 capture performance enhanced under the same conditions.

关键词： CO2 capture Palygorskite modification Limestone Carbonation rate Anti-sintering

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Deep decalcification of factory-provided freezing acidolysis solution to achieveα-high-strength gypsum

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Chinese Journal of Chemical Engineering 2024年第5期69卷 143-151页

作者： Wencai Ye Yulu Li yonggang Dong Lin Yang Yun Yi Jianxin Cao School of Chemistry and Chemical Engineering Guizhou UniversityGuiyang 550025China Engineering Research Center of Efficient Utilization for Industrial Waste Guizhou UniversityGuiyang 550025China Key Laboratory of Guizhou Province for Green Chemical Industry and Clean Energy Technology Guizhou UniversityGuiyang 550025China

The freezing acidolysis solution of the nitric acid-phosphate fertilizer process has a high calcium content,which makes it difficult to produce fine phosphate and high water-soluble phosphate fertilizer ***,based on the potential crystallization principle of calcium sulfate in NH_(4)NO_(3)-H_(3)PO_(4)-H_(2)O,the deep decalcification(*** removal)technology to achieveα-high-strength gypsum originated from freezing acidolysis-solutions has been firstly proposed and ***,calcium can be removed from the factory-provided freezing acidolysis-solution by neutralizing it with ammonia,followed by the addition of ammonium sulfate *** a result,the formation of calcium sulfate in the reaction system undergoes the nucleation and growth of CaSO_(4)·2H_(2)O(DH),as well as its dissolution and crystallization into short columnarα-CaSO_(4)·0.5H_(2)O(α-HH).Remarkably,with the molar ratio of SO_(4)^(2-)/Ca^(2+)at 1.8,the degree of neutralization(NH_(3)/HNO_(3) molar ratio)at 1.7,the reaction temperature of 94℃,and the reaction time of 300 min,the decalcification rate can reach 86.89%,of which the high-strengthα-CaSO_(4)·0.5H_(2)O(α-HH)will be ***,the deep decalcification product meets the standards for the production of fine phosphates and highly water-soluble phosphate ***,the 2 h flexural strength ofα-HH is 5.3 MPa and the dry compressive strength is 36.8 MPa,which is up to the standard of commercialα-HH.

关键词： Nitrophosphate Ammonia neutralization Deep decalcification High-strengthα-hemihydrate gypsum Controlled crystallization at atmospheric pressure

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Improving mechanical properties and high-temperature oxidation of press hardened steel by adding Cr and Si

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International Journal of minerals,Metallurgy and Materials 2024年第8期31卷 1865-1875页

作者： Rong Zhu yonggang Yang Baozhong Zhang Borui Zhang Lei Li Yanxin Wu Zhenli Mi National Engineering Research Center for Advanced Rolling and Intelligent Manufacturing University of Science and Technology BeijingBeijing 102206China Manufacturing Management Department Ningbo Iron&Steel Co.Ltd.Ningbo 315800China Hunan Valin Lianyuan Iron and Steel Co. Ltd.Loudi 417009China

This work investigated the effect of Cr and Si on the mechanical properties and oxidation resistance of press hardened *** indicated that the microstructure of the Cr-Si micro-alloyed press hardened steel consisted of lath martensite,M_(23)C_(6)carbides,and retained *** retained austenite and carbides are responsible for the increase in elongation of the micro-alloyed *** addition,after oxidation at 930℃for 5 min,the thickness of the oxide scales on the Cr-Si micro-alloyed press hardened steel is less than 5μm,much thinner than 45.50μm-thick oxide scales on *** oxide scales of the Cr-Si micro-alloyed steel are composed of Fe_(2)O_(3),Fe_(3)O_(4),mixed spinel oxide(FeCr_(2)O_(4)and Fe_(2)SiO_(4)),and amorphous SiO_(2).Adding Cr and Si significantly reduces the thickness of the oxide scales and prevents the generation of the FeO *** to the increase of spinel FeCr_(2)O_(4)and Fe_(2)SiO_(4)phase in the inner oxide scale and the amorphous SiO_(2)close to the substrate,the oxidation resistance of the Cr-Si micro-alloyed press hardened steel is improved.

关键词： Cr-Si micro-alloyed press hardened steel mechanical properties oxidation resistance amorphous SiO_(2)

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