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关键词

Cu(In 4

Ga)Se₂ 3

光催化 3

CCS 2

CO₂利用 2

CO₂封存 2

CO₂捕集 2

二氧化碳 2

低碳发展 2

催化剂 2

固体氧化物电解池 2

碳中和 2

&alpha 1

(GaxIn1−x)2O3薄膜；带隙可调谐；磁控溅射 1

1T/2H-MoS₂ 1

2 1

4-二硝基茴香醚 1

5G 1

60 GHz；天线阵列；线极化；圆极化；毫米波 1

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适用于全金属外壳5G多输入多输出智能终端的零净空正交同频天线对 Correspondence

常乐1,贺文宝1,陈小民2,檀笑雪1,陈娟1,康凯3,杨阳4

《信息与电子工程前沿（英文）》 2022年第23卷第10期页码 1562-1567 doi: 10.1631/FITEE.2200119

摘要：本文加工了一个Sub-6 GHz的四天线阵列来验证其可行性。在3.4–3.6 GHz，两对天线对的隔离性均优于16.9 dB，任意两个天线之间的包络相关系数（ECC）均小于0.13，两种模式的总效率范围分别为43.5%–61.9%和40.5%

关键词：天线对；第五代移动通信技术（5G）；Sub-6 GHz；极化正交；智能终端；智能手机；零净空；全金属外壳；多输入多输出（MIMO）

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Cu-doped Bi/Bi2sub>WO6sub> catalysts for efficient N2sub> fixation by photocatalysis

《化学科学与工程前沿（英文）》 2023年第17卷第10期页码 1412-1422 doi: 10.1007/s11705-023-2312-1

摘要： In this paper, Cu-doped Bi₂WO₆ was synthesized via a solvothermal method and applied it in photocatalytic N₂ immobilization. Characterization results showed the presence of a small amount of metallic Bi in the photocatalyst, indicating that the synthesized photocatalyst is actually Bi/Cu-Bi₂WO₆ composite. The doped Cu had a valence state of +2 and most likely substituted the position of Bi³⁺. The introduced Cu did not affect the metallic Bi content, but mainly influenced the energy band structure of Bi₂WO₆. The band gap was slightly narrowed, the conduction band was elevated, and the work function was reduced. The reduced work function improved the transfer and separation of charge carriers, which mainly caused the increased photoactivity. The optimized NH₃ generation rates of Bi/Cu-Bi₂WO₆ reached 624 and 243 μmol·L^–1·g^–1·h^–1 under simulated solar and visible light, and these values were approximately 2.8 and 5.9 times higher those of Bi/Bi₂WO₆, respectively. This research provides a method for improving the photocatalytic N₂ fixation and may provide more information on the design and preparation of heteroatom-doped semiconductor photocatalysts for N₂-to-NH₃ conversion.

关键词： Bi₂WO₆ Cu doping work function photocatalytic N₂ fixation charge separation

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All-inorganic TiO/CsAgBiBr composite as highly efficient photocatalyst under visible light irradiation

《化学科学与工程前沿（英文）》 2023年第17卷第12期页码 1925-1936 doi: 10.1007/s11705-023-2344-6

摘要： In recent years, limited photocatalysis efficiency and wide band gap have hindered the application of TiO₂ in the field of photocatalysis. A leading star in photocatalysis has been revealed as lead-free Cs₂AgBiBr₆ double halide perovskite nanocrystals, owing to its strong visible light absorption and tunable band gap. In this work, this photocatalytic process was facilitated by a unique TiO₂/Cs₂AgBiBr₆ composite, which was identified as an S-cheme heterojunction. TiO₂/Cs₂AgBiBr₆ composite was investigated for its structure and photocatalytic behavior. The results showed that when the perovskite dosage is 40%, the photocatalytic rate of TiO₂ could be boosted to 0.1369 min^–1. This paper discusses and proposes the band gap matching, carrier separation, and photocatalytic mechanism of TiO₂/Cs₂AgBiBr₆ composites, which will facilitate the generation of new ideas for improving TiO₂’s photocatalytic performance.

关键词： Cs₂AgBiBr₆ nanocrystals visible-light photocatalyst Cs₂AgBiBr₆/TiO₂ heterojunction

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基于LiNbO3sub>/SiO2sub>/SiC异质结构实现44 GHz超高频声表面波谐振器 Article

周剑, 张定红, 刘炀辉, 卓凤玲, 钱莉荣, 李红浪, 傅永庆, 段辉高

《工程（英文）》 2023年第20卷第1期页码 112-119 doi: 10.1016/j.eng.2022.05.003

摘要：然而，受限于制造技术的发展，SAW器件的频率通常在几个吉赫（GHz）以内，严重限制了SAW器件在5G通信、高精度传感、光子与量子控制中的应用。针对上述关键问题，本文提出将极端纳米制造技术与LiNbO3sub>/SiO2sub>/SiC异质结构衬底相结合的策略，成功制备出波长为160 nm的超高频SAW器件，其高阶模态谐振频率高达约44 GHz，获得的机电耦合系数高达15.7%。基于LiNbO3sub>/SiO2sub>/SiC 异质结构衬底的超高频SAW呈现出多种模态，理论仿真分析确定了高阶声波模态的波模态。

关键词：超高频声表面波高阶声波模态高灵敏度

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Antibacterial and anti-flaming PA6 composite with metathetically prepared nano AgCl@BaSO

Wei Zhang, Boren Xu, Caihong Gong, Chunwang Yi, Shen Zhang

《化学科学与工程前沿（英文）》 2021年第15卷第2期页码 340-350 doi: 10.1007/s11705-020-1942-9

摘要： In this study, a facile and environmentally friendly method with low energy consumption for preparing nanoscale AgCl and BaSO co-precipitates (AgCl@BaSO co-precipitates) was developed based on the metathetical reaction. Then, the dried co-precipitates were melt-compounded with polyamide 6 (PA6) resins at a specified mass ratio in a twin-screw extruder. The results demonstrated that in the absence of any coating agent or carrier, the nanoparticles of AgCl@BaSO co-precipitates were homogeneously dispersed in the PA6 matrix. Further analysis showed that after the addition of AgCl@BaSO co-precipitates, the antibacterial performance, along with the flame-retardance and anti-dripping characteristics of PA6, was enhanced significantly. In addition, the PA6 composites possessed high spinnability in producing pre-oriented yarn.

关键词： nano AgCl@BaSO₄ co-precipitates antibacterial flame resistance PA6 composite PA6 yarn

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Piezocatalytic performance of FeO−BiMoO catalyst for dye degradation

《化学科学与工程前沿（英文）》 2023年第17卷第6期页码 716-725 doi: 10.1007/s11705-022-2265-9

摘要： A Fe₂O₃−Bi₂MoO₆ heterojunction was synthesized via a hydrothermal method. Scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray, powder X-ray diffraction, Fourier transform infrared spectroscopy and ultra-violet−visible near-infrared spectrometry were performed to measure the structures, morphologies and optical properties of the as-prepared samples. The various factors that affected the piezocatalytic property of composite catalyst were studied. The highest rhodamine B degradation rate of 96.6% was attained on the 3% Fe₂O₃−Bi₂MoO₆ composite catalyst under 60 min of ultrasonic vibration. The good piezocatalytic activity was ascribed to the formation of a hierarchical flower-shaped microsphere structure and the heterostructure between Fe₂O₃ and Bi₂MoO₆, which effectively separated the ultrasound-induced electron–hole pairs and suppressed their recombination. Furthermore, a potential piezoelectric catalytic dye degradation mechanism of the Fe₂O₃−Bi₂MoO₆ catalyst was proposed based on the band potential and quenching effect of radical scavengers. The results demonstrated the potential of using Fe₂O₃−Bi₂MoO₆ nanocomposites in piezocatalytic applications.

关键词： piezocatalysis Fe₂O₃−Bi₂MoO₆ dye decomposition ultrasonic vibration

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Photoreduction adjusted surface oxygen vacancy of BiMoO for boosting photocatalytic redox performance

《化学科学与工程前沿（英文）》 2023年第17卷第12期页码 1937-1948 doi: 10.1007/s11705-023-2353-5

摘要： In this study, Bi₂MoO₆ with adjustable rich oxygen vacancies was prepared by a novel and simple solvothermal-photoreduction method which might be suitable for a large-scale production. The experiment results show that Bi₂MoO₆ with rich oxygen vacancies is an excellent photocatalyst. The photocatalytic ability of BMO-10 is 0.3 and 3.5 times higher than that of the pristine Bi₂MoO₆ for Rhodamine B degradation and Cr(VI) reduction, respectively. The results display that the band energy of the samples with oxygen vacancies was narrowed and the light absorption was broadened. Meanwhile, the efficiency of photogenerated electron-holes was increased and the separation and transfer speed of photogenerated carriers were improved. Therefore, this work provides a convenient and efficient method to prepare potential adjustable oxygen vacancy based photocatalysts to eliminate the pollution of dyes and Cr(VI) in water.

关键词： Bi₂MoO₆ oxygen vacancies photoreduction Cr(VI) RhB

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Effective degradation of tetracycline by mesoporous Bi

Xiaolong CHU,Guoqiang SHAN,Chun CHANG,Yu FU,Longfei YUE,Lingyan ZHU

《环境科学与工程前沿（英文）》 2016年第10卷第2期页码 211-218 doi: 10.1007/s11783-014-0753-y

摘要： Bi WO was synthesized with a hydrothermal method at different pHs and used for the degradation of tetracycline (TC) in water. The mesoporous Bi WO prepared at pH 1 (BWO-1) displayed the highest adsorption and degradation capacity to TC due to its large surface area and more efficient capacity to separate photogenerated electrons and holes. 97% of TC at 20 mg·L was removed by BWO-1 at 0.5 g·L after 120 min irradiation under simulated solar light. Only 31% of the total organic carbon (TOC) was removed after 360 min irradiation although the TC removal reached 100%, suggesting that TC was mainly transformed to intermediate products rather than completely mineralized. The intermediates were identified by high-performance liquid chromatography-time of flight-mass spectrometry (HPLC-TOF-MS) and possible photodegradation pathways were proposed.

关键词： Bi₂WO₆ hydrothermal synthesis tetracycline (TC) photocatalysis

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Fabrication of highly efficient Bi

Wei Mao, Lixun Zhang, Tianye Wang, Yichen Bai, Yuntao Guan

《环境科学与工程前沿（英文）》 2021年第15卷第4期 doi: 10.1007/s11783-020-1344-8

摘要： Abstract • A novel Bi2WO6/CuS composite was fabricated by a facile solvothermal method. • This composite efficiently removed organic pollutants and Cr(VI) by photocatalysis. • The DOM could promoted synchronous removal of organic pollutants and Cr(VI). • This composite could be applied at a wide pH range in photocatalytic reactions. • Possible photocatalytic mechanisms of organic pollutants and Cr(VI) were proposed. A visible-light-driven Bi2WO6/CuS p-n heterojunction was fabricated using an easy solvothermal method. The Bi2WO6/CuS exhibited high photocatalytic activity in a mixed system containing rhodamine B (RhB), tetracycline hydrochloride (TCH), and Cr (VI) under natural conditions. Approximately 98.8% of the RhB (10 mg/L), 87.6% of the TCH (10 mg/L) and 95.1% of the Cr(VI) (15 mg/L) were simultaneously removed from a mixed solution within 105 min. The removal efficiencies of TCH and Cr(VI) increased by 12.9% and 20.4%, respectively, in the mixed solution, compared with the single solutions. This is mainly ascribed to the simultaneous consumption electrons and holes, which increases the amount of excited electrons/holes and enhances the separation efficiency of photogenerated electrons and holes. Bi2WO6/CuS can be applied over a wide pH range (2–6) with strong photocatalytic activity for RhB, TCH and Cr(VI). Coexisiting dissolved organic matter in the solution significantly promoted the removal of TCH (from 74.7% to 87.2%) and Cr(VI) (from 75.7% to 99.9%) because it accelerated the separation of electrons and holes by consuming holes as an electron acceptor. Removal mechanisms of RhB, TCH, and Cr(VI) were proposed, Bi2WO6/CuS was formed into a p-n heterojunction to efficiently separate and transfer photoelectrons and holes so as to drive photocatalytic reactions. Specifically, when reducing pollutants (e.g., TCH) and oxidizing pollutants (e.g., Cr(VI)) coexist in wastewater, the p-n heterojunction in Bi2WO6/CuS acts as a “bridge” to shorten the electron transport and thus simultaneously increase the removal efficiencies of both types of pollutants.

关键词： Photocatalysis Bi₂WO₆/CuS Organic pollutants Cr(VI) Synergistic effect

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Morphology selective construction of

Maher Darwish, Ali Mohammadi, Navid Assi, Samer Abuzerr, Youssef Alahmad

《化学科学与工程前沿（英文）》 2020年第14卷第4期页码 561-578 doi: 10.1007/s11705-019-1808-1

摘要： Controlled growth of Bi WO nanorods with exposed [0 0 1] facets and the fabrication of an Fe O -Bi WO magnetic composite by a microwave-assisted polyol process, were achieved in this study. The adsorptivity and photocatalytic performance of the composite toward sunset yellow dye degradation were greatly enhanced by the -cyclodextrin cavities on its surface, firmly anchored through a cetyltrimethylammonium bromide linkage. A series of examinations and characterizations were carried out to determine the influence of various factors on the morphological modulation-photocatalytic behavior of the pure Bi WO prior to final functionalization. Changing the pH of the precursor solution impacted the formation of 0D, 2D, and 3D structures; however, the presence of hexamethylenetetramine surfactant induced the development of 1D nanorod structure. A reasonable crystal growth mechanism was proposed to elucidate the formation process. Conversely, the mechanism of the activity enhancement of -cyclodextrin functionalized Fe O -Bi WO , compared to that of the non-functionalized samples, could be realized with the assistance of chemical trapping experiments on sunset yellow, and was confirmed on the colorless antibiotic (sulfamethoxazole). The high performance and durability of this composite can be attributed to the facet-dependent activity, large adsorption capacity due to inclusion interactions, enhanced visible light absorption, and efficient charge separation.

关键词： β-cyclodextrin Bi₂WO₆ shape controlled nanorod sunset yellow

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700 °C 及以上蒸汽温度下先进USC发电厂用耐热材料的研究和开发 Review

Fujio Abe

《工程（英文）》 2015年第1卷第2期页码 211-224 doi: 10.15302/J-ENG-2015031

摘要：

欧洲、美国、日本已开展蒸汽温度为700 °C 及以上的先进超超临界(A-USC) 发电厂用材料开发项目，以实现更高能效和低二氧化碳排放量。近年来中国、印度等也开展了上述项目的开发和研究。这些项目涉及采用镍基合金更换马氏体9%~12%Cr 钢以用于最高温度的锅炉和涡轮部件，从而在700 °C 及以上温度下提供充足的蠕变强度。为尽量减少对昂贵的镍基合金的需求，马氏体9%~12%Cr 钢可用于A-USC 电厂中的次高温部件(最高温度不超过650 °C)。本文综述了A-USC 电厂厚型材锅炉和涡轮部件用镍基合金和马氏体9%~12%Cr 钢的研究和开发，主要关注高温下基底金属和焊缝的长期蠕变断裂强度、焊缝强度损失、蠕变疲劳性质和显微结构演化。

关键词：镍基合金 9 %~12 % Cr 钢蠕变强度蠕变疲劳性质焊缝晶界显微结构 &gamma &prime M23sub>C6sub> 碳化物

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星地高速移动场景OTFS性能研究

李天时1,何睿斯1,艾渤1,杨汨1,钟章队1,张浩翔2

《信息与电子工程前沿（英文）》 2021年第22卷第4期页码 517-526 doi: 10.1631/FITEE.2000468

摘要：第六代移动通信系统（sixth generation, 6G）相比5G (fifth generation）移动通信系统在应用场景、传输性能等方面需满足更高指标。为应对卫星、无人机和高速铁路等高移动性场景，6G面临的挑战之一是满足高达1000 km/h超高速移动场景的通信需求。2.2 GHz和20 GHz对应的子载波间隔分别为15 kHz和60 kHz。

关键词：时延-多普勒域；高移动性通信；最小均方误差算法；正交时频空；星地通信；毫米波通信

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Molecular level understanding of CO2sub> capture in ionic liquid/polyimide composite membrane

Linlin You, Yandong Guo, Yanjing He, Feng Huo, Shaojuan Zeng, Chunshan Li, Xiangping Zhang, Xiaochun Zhang

《化学科学与工程前沿（英文）》 2022年第16卷第2期页码 141-151 doi: 10.1007/s11705-020-2009-7

摘要： Ionic liquid (IL)/polyimide (PI) composite membranes demonstrate promise for use in CO separation applications. However, few studies have focused on the microscopic mechanism of CO in these composite systems, which is important information for designing new membranes. In this work, a series of systems of CO in 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide composited with 4,4-(hexafluoroisopropylidene) diphthalic anhydride (6FDA)-based PI, 6FDA-2,3,5,6-tetramethyl-1,4-phenylene-diamine, at different IL concentrations were investigated by all-atom molecular dynamics simulation. The formation of IL regions in PI was found, and the IL regions gradually became continuous channels with increasing IL concentrations. The analysis of the radial distribution functions and hydrogen bond numbers demonstrated that PI had a stronger interaction with cations than anions. However, the hydrogen bonds among PI chains were destroyed by the addition of IL, which was favorable for transporting CO . Furthermore, the self-diffusion coefficient and free energy barrier suggested that the diffusion coefficient of CO decreased with increasing IL concentrations up to 35 wt-% due to the decrease of the fractional free volume of the composite membrane. However, the CO self-diffusion coefficients increased when the IL contents were higher than 35 wt-%, which was attributed to the formation of continuous IL domain that benefitted the transportation of CO .

关键词： carbon dioxide ionic liquid 6FDA-TeMPD composite membrane molecular dynamics simulation

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微波辐射下离子液体［RMIm］PF6（R=P, B, C6）的合成及其电导率研究

何永福

《中国工程科学》 2008年第10卷第9期页码 92-95

摘要： 1－溴己烷)在80 ℃回流加热10 min，可制得咪唑类离子液体的中间体溴代1－丁基－3－甲基咪唑（［BMIm］Br）、溴代1－丙基－3－甲基咪唑（［PMIm］Br）、溴代1－己基－3－甲基咪唑（［C6MIm］Br），进一步与HPF6在室温搅拌反应4 h，制得憎水性的咪唑类离子液体［BMIm］PF6，［PMIm］PF6和［C6MIm］PF6。

关键词：离子液体微波辐射电导率 [BMIm]PF6 [PMIm]PF6 [C6MIm]PF6

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基于玻璃集成无源器件工艺的60-GHz小型化宽带超表面天线 Research Articles

Hai-yang XIA, Jin-can HU, Tao ZHANG, Lian-ming LI, Fu-chun ZHENG

《信息与电子工程前沿（英文）》 2020年第21卷第1期页码 174-181 doi: 10.1631/FITEE.1900453

摘要：提出一种面向封装天线应用的60-GHz小型化宽带超表面天线。基于玻璃集成无源器件制造技术，采用共面波导馈电环形谐振器表征玻璃基板的材料特性。该天线于高介电常数玻璃基板上设计以实现天线小型化。采用基于探针结构的天线测量装置完成该天线测试，测试结果显示天线带宽为53.3～67 GHz。在60 GHz频点处，该天线增益测量值约为5 dBi。

关键词： 60 GHz；封装天线；共面波导馈电环形谐振器；玻璃集成无源器件；超表面天线；小型化天线

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标题作者时间类型操作

适用于全金属外壳5G多输入多输出智能终端的零净空正交同频天线对

常乐1,贺文宝1,陈小民2,檀笑雪1,陈娟1,康凯3,杨阳4

期刊论文

Cu-doped Bi/Bi2sub>WO6sub> catalysts for efficient N2sub> fixation by photocatalysis

期刊论文

All-inorganic TiO/CsAgBiBr composite as highly efficient photocatalyst under visible light irradiation

期刊论文

基于LiNbO3sub>/SiO2sub>/SiC异质结构实现44 GHz超高频声表面波谐振器

周剑, 张定红, 刘炀辉, 卓凤玲, 钱莉荣, 李红浪, 傅永庆, 段辉高