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Fluorescent light enhanced graphitic carbon nitride/ceria with ultralow-content platinum catalyst for oxidative decomposition of formaldehyde at ambient temperature

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Rare Metals 2021年第11期40卷 3135-3146页

作者： Gang Huang Zhi-Hua Xu Ting-Ting Luo zhao-xiong yan Meng Zhang Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education Jianghan UniversityWuhan 430056China Materials Analysis Center Wuhan University of TechnologyWuhan 430070China Hubei Key Laboratory of Industrial Fume and Dust Pollution Control Jianghan UniversityWuhan 430056China

The complete decomposition of formaldehyde(HCHO) at ambient temperature is the most potential strategy for HCHO elimination from indoor ***,extra low content of Pt nanoparticles(0.025 wt%)supported on water-solubility carbon nitride/ceria(Pt/gC_(3)N_(4)@CeO_(2)) was prepared for gaseous HCHO removal at ambient temperature in a simulated indoor *** light(8 W) illumination could visibly boost the complete decomposition of HCHO into CO_(2) over Pt/gC_(3)N_(4)@CeO_(2).The cooperative effect in the distinct heterostructure and plenty of surface reactive oxygen species contribute primarily to the enhanced catalytic performance of Pt/g-C_(3)N_(4)@CeO_(2).Moreover,the possible mechanism of HCHO oxidation over Pt/g-C_(3)N_(4)@CeO_(2) assisted by the fluorescent light irradiation was proposed based on the physicochemical and optical characterization as well as the result of in situ diffuse reflectance infrared Fourier transform *** work might shed some light on the potential application of the versatile catalysts for ambient-temperature catalytic decomposition of HCHO by making full use of the indoor energies.

关键词： Graphitic carbon nitride(g-C3N4) CeO_(2) Catalytic oxidation Formaldehyde decomposition Ambient temperature Fluorescent light irradiation

Synthesis and characterization of photoactive polythiophenes bearing azobenzene groups in the side chain

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材料科学与工程（中英文版） 2007年第1期1卷 1-6页

作者： zhao xiong-yan School of Material Science and Technology Hebei University of Science and Technology Shijiazhuang 050018 China

Multifunctional Nacre‑Like Nanocomposite Papers for Electromagnetic Interference Shielding via Heterocyclic Aramid/MXene Template‑Assisted In‑Situ Polypyrrole Assembly

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Nano-Micro Letters 2025年第3期17卷 37-54页

作者： Jinhua xiong Xu zhao Zonglin Liu He Chen Qian yan Huanxin Lian Yunxiang Chen Qingyu Peng Xiaodong He National Key Laboratory of Science and Technology On Advanced Composites in Special Environments Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin 150080People’s Republic of China

Robust, ultra-flexible, and multifunctional MXene-basedelectromagnetic interference (EMI) shielding nanocomposite filmsexhibit enormous potential for applications in artificial intelligence,wireless telecommunication, and portable/wearable electronic *** this work, a nacre-inspired multifunctional heterocyclic aramid(HA)/MXene@polypyrrole (PPy) (HMP) nanocomposite paper withlarge-scale, high strength, super toughness, and excellent tolerance tocomplex conditions is fabricated through the strategy of HA/MXenehydrogel template-assisted in-situ assembly of PPy. Benefiting from the"brick-and-mortar" layered structure and the strong hydrogen-bondinginteractions among MXene, HA, and PPy, the paper exhibits remarkable mechanical performances, including high tensile strength (309.7 MPa),outstanding toughness (57.6 MJ m−3), exceptional foldability, and structural stability against ultrasonication. By using the template effect ofHA/MXene to guide the assembly of conductive polymers, the synthesized paper obtains excellent electronic conductivity. More importantly,the highly continuous conductive path enables the nanocomposite paper to achieve a splendid EMI shielding effectiveness (EMI SE) of 54.1 dBat an ultra-thin thickness (25.4 μm) and a high specific EMI SE of 17,204.7 dB cm2g−1. In addition, the papers also have excellent applicationsin electromagnetic protection, electro-/photothermal de-icing, thermal therapy, and fire safety. These findings broaden the ideas for developinghigh-performance and multifunctional MXene-based films with enormous application potential in EMI shielding and thermal management.

关键词： MXene Remarkable mechanical properties Heterocyclic aramid Electromagnetic interference shielding Polypyrrole Multifunctionality

大型某型客机复材机身舱门区结构补强研究分析

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工程力学 2016年第B6期33卷 296-300页

作者：马骏王岩赵艳雄何景武北京航空航天大学航空科学与工程学院北京100191 北京民用飞机技术研究中心北京102211

复合材料在民用客机上的应用量越来越高,目前已经出现了全复合材料机身的大型客机,对于全复合材料机身舱门区补强问题也显得尤为重要。该文就大型某型客机复合材料机身舱门区结构补强进行分析研究,设计了一套适用于大型客机复合材料机... 详细信息

复合材料在民用客机上的应用量越来越高,目前已经出现了全复合材料机身的大型客机,对于全复合材料机身舱门区补强问题也显得尤为重要。该文就大型某型客机复合材料机身舱门区结构补强进行分析研究,设计了一套适用于大型客机复合材料机身的补强结构并进行了有限元计算分析和结构优化,计算结果符合设计的相关要求。

关键词：大型客机复合材料大开口补强优化

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稀土上转换纳米发光材料的研究进展

现代化工 2016年第7期36卷 21-24页

作者：赵玉慈赵雄燕王鑫河北科技大学材料科学与工程学院河北石家庄050018

综述了近年稀土上转换发光纳米材料的研究状况和技术进展,着重讨论了稀土上转换发光纳米材料的制备方法和表面修饰手段,并对稀土上转换发光纳米材料的应用前景进行了分析和展望。

关键词：稀土上转换纳米材料发光表面修饰

Establishing a new testing protocol of the electrochemical stability window for electric double-layer capacitors

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Science China Chemistry 2025年第1期68卷 217-225页

作者： Ruilin Hou Xiaoxi zhao Tingting Liang Qingyun Dou Shan Xu Xingbin yan School of Materials Science and Engineering Sun Yat-sen University Laboratory of Clean Energy Chemistry and Materials Lanzhou Institute of Chemical Physics Chinese Academy of Sciences College of Engineering and Applied Sciences Nanjing University Center of Industrial Analysis and Testing Guangdong Academy of Science

The electrochemical stability window(ESW) is crucial for determining the energy density of electric double-layer capacitors(EDLCs). However, current ESW testing protocols of EDLCs are strongly affected by artificial factors, thereby leading to unreliable result. To solve this problem, we first identify the key shortcomings of the traditional protocols by analyzing their test principles. Subsequently, taking an aqueous carbon-based EDLC as an example, we design a side reaction descriptor to represent the response difference in the charging capacitance to side reactions between the cyclic voltammetry and galvanostatic chargedischarge methods. With the aid of this descriptor, we propose a new ESW testing protocol, which is not only able to completely avoid the adverse influence of subjective factors but also fully consider the operating condition limitations. The protocol can be extended from the single electrode to the full device. This work proposes a more rigorous definition of ESW and provides a reliable protocol for evaluating the ESW of EDLCs.

关键词： electric double-layer capacitors electrochemical stability window testing protocol side reaction descriptor operating limitation

Channel pruning on frequency response

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Science China(Information Sciences) 2025年第1期68卷 159-170页

作者： Hang LIN Yifan PENG Lin BIE Chenggang yan Xibin zhao Yue GAO School of Software Tsinghua University School of Automation Hangzhou Dianzi University

Network pruning has a significant role in reducing network parameters and accelerating the inference time of the network. Some existing methods prune the network based on the frequency of the data, and finally obtain a sub-network with high accuracy. However, according to our experimental analysis, different frequencies of information in the data contribute differently to the accuracy of the model, and using this information directly for pruning without making a selection will lead to incorrect results. We believe that pruning should retain the convolutional kernels in the network that process important information, while those kernels that process unimportant information should be removed. In this paper, we first investigate the meaning of each frequency band information in the spectrum and their contribution to the prediction accuracy of the network,and according to these results, we propose a new pruning method based on frequency response(PFR). Our PFR finds and removes the convolutional kernels in the network that specialize in processing unimportant information, resulting in a compact neural network model. PFR obtains significant experimental results on different datasets, for example, a 56.0% raduction of float points operations(FLOPs) on Res Net-50 and only 0.37% of Top-1 accuracy degradation on the Image Net dataset.

关键词： deep learning model compression filter pruning channel pruning frequency response

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机械致荧光变色材料荧光特性的结构依赖性研究进展

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应用化工 2021年第2期50卷 547-550页

作者：李艳王鑫赵雄燕河北科技大学材料科学与工程学院河北石家庄050018 河北省材料近净成形技术重点实验室河北石家庄050018

综述了近年来机械致荧光变色材料荧光特性的分子结构依赖性研究进展,主要包括四苯乙烯基机械致荧光变色材料、噻唑基机械致荧光变色材料、吡啶基机械致荧光变色材料、苯并咪唑基机械致荧光变色材料以及其他结构的机械致荧光变色材料。... 详细信息

综述了近年来机械致荧光变色材料荧光特性的分子结构依赖性研究进展,主要包括四苯乙烯基机械致荧光变色材料、噻唑基机械致荧光变色材料、吡啶基机械致荧光变色材料、苯并咪唑基机械致荧光变色材料以及其他结构的机械致荧光变色材料。同时归纳总结了该领域今后的发展趋势,未来的研究重点将主要集中在设计开发具有对外力刺激相应灵敏度高、荧光颜色变化明显且可逆性和可重复性强等优点的机械致荧光变色材料。

关键词：机械致荧光变色聚集诱导发光摩擦变色分子结构

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刺激响应荧光变色材料的结构特点及应用

应用化工 2021年第1期50卷 229-232页

作者：李艳王鑫赵雄燕河北科技大学材料科学与工程学院河北石家庄050018 河北省材料近净成形技术重点实验室河北石家庄050018 河北省药用分子化学重点实验室河北石家庄050018

综述了近年来刺激响应荧光变色材料的研究进展,主要包括机械刺激响应荧光变色材料、热刺激响应荧光变色材料、化学刺激响应荧光变色材料、光刺激响应荧光变色材料以及其他类型刺激响应荧光变色材料。并对今后刺激响应荧光变色材料的发... 详细信息

综述了近年来刺激响应荧光变色材料的研究进展,主要包括机械刺激响应荧光变色材料、热刺激响应荧光变色材料、化学刺激响应荧光变色材料、光刺激响应荧光变色材料以及其他类型刺激响应荧光变色材料。并对今后刺激响应荧光变色材料的发展前景进行了分析与展望。研制开发综合性能优异且具有多重刺激响应特性的荧光变色材料以及设计合成对外界刺激相应灵敏度高且颜色变化明显的荧光变色材料将是该领域科技工作者今后努力的方向。

关键词：荧光变色材料刺激响应荧光发射荧光材料