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Pd Pt VO_(x)/CeO_(2)-ZrO_(2):Highly efficient catalysts with good sulfur dioxide-poisoning reversibility for the oxidative removal of ethylbenzene

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Journal of Environmental Sciences 2024年第4期138卷 153-166页

作者： Jia Wang Yuxi Liu jiguang Deng Lin Jing Xiuqing Hao Xing zhang Xiaohui Yu Hongxing Dai Beijing Key Laboratory for Green Catalysis and Separation Key Laboratory of Beijing on Regional Air Pollution ControlKey Laboratory of Advanced Functional MaterialsEducation Ministry of ChinaLaboratory of Catalysis Chemistry and NanoscienceDepartment of Chemical EngineeringFaculty of Environment and LifeBeijing University of TechnologyBeijing 100124China

The PdPtVO_(x)/CeO_(2)-ZrO_(2)(PdPtVO_(x)/CZO)catalysts were obtained by using different approaches,and their physical and chemical properties were determined by various *** activities of these materials in the presence of H_(2)O or SO_(2)were evaluated for the oxidation of ethylbenzene(EB).The PdPtVO_(x)/CZO sample exhibited high catalytic activity,good hydrothermal stability,and reversible sulfur dioxide-poisoning performance,over which the specific reaction rate at 160℃,turnover frequency at 160℃(TOF_(Pd or Pt)),and apparent activation energy were 72.6 mmol/(g_(Pt)·sec)or 124.2 mmol/(g_(Pd)·sec),14.2 sec^(-1)(TOF_(Pt))or 13.1 sec^(-1)(TOF_(Pd)),and 58 k J/mol,*** large EB adsorption capacity,good reducibility,and strong acidity contributed to the good catalytic performance of PdPtVO_(x)/*** activity of PdPtVO_(x)/CZO decreased when 50 ppm SO_(2)or(1.0 vol.%H_(2)O+50 ppm SO_(2))was added to the feedstock,but was gradually restored to its initial level after the SO_(2)was cut *** good reversible sulfur dioxide-resistant performance of PdPtVO_(x)/CZO was associated with the facts:(i)the introduction of SO_(2)leads to an increase in surface acidity;(ii)V can adsorb and activate SO_(2),thus accelerating formation of the SO_(x)^(2-)(x=3 or 4)species at the V and CZO sites,weakening the adsorption of sulfur species at the PdPt active sites,and hence protecting the PdPt active sites to be not poisoned by SO_(2).EB oxidation over PdPtVO_(x)/CZO might take place via the route of EB→styrene→phenyl methyl ketone→benzaldehyde→benzoic acid→maleic anhydride→CO_(2)and H_(2)O.

关键词： Ceria-zirconia Supported palladium-platinum-vanadium catalyst Volatile organic compound Ethylbenzene oxidation Sulfur dioxide resistance

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模拟酸雨对烟田土壤酸化及烟草生长发育的影响

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中国烟草科学 2024年第3期45卷 26-33页

作者：相雨晴肖艳松刘明宏郜军艺李彩斌高睿康刘馥榕张继光彭玉龙中国农业科学院烟草研究所青岛266101 湖南省烟草公司郴州市公司湖南郴州423099 贵州省烟草公司遵义市公司贵州遵义563000 贵州省烟草公司毕节市公司贵州毕节551799

我国西南地区是全球酸沉降负荷最高的地区之一,为明确酸性降水给烟田生态系统产生的可能危害,在田间利用自动模拟酸雨监测仪,模拟自然降雨(CK,pH 6.3)、超纯水(T1,pH 6.8)和酸雨(T2,pH 3.5)3种条件,测定其对土壤酸化及阳离子特征、烟草... 详细信息

我国西南地区是全球酸沉降负荷最高的地区之一,为明确酸性降水给烟田生态系统产生的可能危害,在田间利用自动模拟酸雨监测仪,模拟自然降雨(CK,pH 6.3)、超纯水(T1,pH 6.8)和酸雨(T2,pH 3.5)3种条件,测定其对土壤酸化及阳离子特征、烟草长势、生物量及氮磷钾积累量的影响。结果表明:(1)与CK和T1相比,T2土壤pH显著降低且随时间推移各处理之间差异逐渐增大;T2土壤交换性酸及铝离子含量显著增加,CEC和盐基总量下降;(2)T2显著抑制烟草生长发育,显著降低烟株株高、茎围、有效叶数及叶片长、宽,CK的茎和叶生物量最高,T1的根生物量最高;(3)根中氮和钾的积累量均为T2最低;茎和叶中氮的积累量表现为T2>T1>CK,茎和叶中钾的积累量表现为CK>T2>T1;磷的积累量在不同部位中差异不大,整体表现为T2最低。可见pH 3.5的酸雨能导致土壤明显酸化,显著抑制烟株生长发育,应采取有效措施控制其发生危害。

关键词：酸雨土壤酸化特性土壤阳离子特性农艺性状

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Aggregation-induced Emission Probe for Fluorescence/Photoacoustic Dual-modality Imaging and Photodynamic/Photothermal Treatment

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Chemical Research in Chinese Universities 2024年第2期40卷 293-304页

作者： CHEN Peiyu zhang Guoyang LI jiguang MA Lijun ZHOU Jiaying ZHU Mingguang LI Shuo WANG Zhuo State Key Laboratory of Chemical Resource Engineering College of ChemistryBeijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijing100029P.R.China

The combination of near-infrared(NIR)fluorescence imaging(FLI)and photoacoustic imaging(PAI)can effectively compensate for each other’s inherent limitations,which can provide reliable and rich information on tumor ***,the development of FL/PA dual-modality imaging probes is beneficial for achieving precision cancer diagnosis and ***,we designed an efficient phototherapy agent methoxy bithiophene indene(OTIC),which was based on aggregation-induced emission(AIE)active *** improve the water dispersion and enrichment of OTIC at the tumor site,OTIC nanoparticles(OTIC NPs)were prepared by a nanoprecipitation *** balance between radiation and non-radiation energy dissipation was regulated by the strong donor-acceptor interaction and intramolecular *** OTIC NPs exhibited bright NIR fluorescence,photoacoustic signals,efficient generation of reactive oxygen species,and high photothermal conversion efficiency under NIR *** imaging of the tumor and mice sentinel lymph nodes(SLNs)with OTIC NPs was visualized by NIR FL/PA dual-modal *** the comprehensive imaging information provided by OTIC NPs in vivo,tumors were ablated under laser irradiation,which greatly improved the therapeutic *** NPs would be possible to realize the precise guidance of FL/PA imaging for tumor treatment in the future clinical application.

关键词： Aggregation-induced emission Dual-modality imaging Photodynamic/photothermal treatment

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A comparative investigation of NdSrCu_(1-x) Co_x O_(4-δ) and Sm_(1.8) Ce_(0.2) Cu_(1-x) Co_x O_(4-δ) (x:0–0.4) for NO decomposition

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Journal of Environmental Sciences 2010年第3期22卷 448-453页

作者： jiguang Deng Lei zhang Yunsheng Xia Hongxing Dai Hong He Laboratory of Catalysis Chemistry and Nanoscience Department of Chemistry and Chemical Engineering College of Environmental and Energy EngineeringBeijing Unversity of Technology Beijing 100124 China.

A series of single-phase T-structured NdSrCu 1-x Co x O 4-δ with oxygen vacancies and T -structured Sm 1.8 Ce 0.2 Cu 1-x Co x O 4-δ （x： 0–0.4） with oxygen excess were prepared using ultrasound-assisted citric acid complexing method, and characterized by means of techniques such as thermogravimetric analysis and NO temperature-programmed desorption （NO-TPD）. The catalytic activities of these materials were evaluated for the decomposition of NO. It was found that the NdSrCu 1-x Co x O 4-δ catalysts were of oxygen vacancies whereas the Sm 1.8 Ce 0.2 Cu 1？x Co x O 4-δ ones possessed excessive oxygen （i.e., over-stoichiometric oxygen）; with a rise in Co doping level, the oxygen vacancy density of NdSrCu 1-x Co x O 4-δ decreased while the over-stoichiometric oxygen amount of Sm 1.8 Ce 0.2 Cu 1-x Co x O 4-δ increased. The NO-TPD results revealed that NO could be activated much easier over the oxygen-deficient perovskite-like oxides than over the oxygen-excessive perovskite-like oxides, with the NdSrCuO 3.702 catalyst showing the best efficiency in activating NO molecules. Under the conditions of 1.0% NO/helium, 2800 hr -1 , and 600–900°C, the catalytic activity of NO decomposition followed the order of NdSrCuO 3.702 〉 NdSrCu 0.8 Co 0.2 O 3.736 〉 NdSrCu 0.6 Co 0.4 O 3.789 〉 Sm 1.8 Ce 0.2 Cu 0.6 Co 0.4 O 4.187 〉 Sm 1.8 Ce 0.2 Cu 0.8 Co 0.2 O 4.104 〉 Sm 1.8 Ce 0.2 CuO 4.045 , in concord with the sequence of decreasing oxygen vacancy or oxygen excess density. Based on the results, we concluded that the higher oxygen vacancy density and the stronger Cu 3＋ /Cu 2＋ redox ability of NdSrCu 1-x Co x O 4-δ account for the easier activation of NO and consequently improve the catalytic activity of NO decomposition over the catalysts.

关键词： perovskite-like oxide catalysts NO decomposition oxygen nonstoichiometry Cu^ 3+ /Cu ^2+ Cu^ 2+ /Cu^ +

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Electrochemical hydrogen storage properties of Mg100-xNix produced by hydriding combustion synthesis and mechanical milling

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Progress in Natural Science:Materials International 2017年第1期27卷 144-148页

作者： Delong Zhu jiguang zhang Yunfeng Zhu Yao zhang Yana Liu Huaijun Lin Wenfeng zhang Liquan Li College of Materials Science and Engineering Nanjing Tech University Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites Nanjing Tech University School of Materials Science and Engineering Southeast University

In this work, Mg-based hydrogen storage composites with an initial 100-x: x（x=25, 32.3, 50, 66.7） of Mg:Ni molar ratio were prepared by HCS+MM and their phase compositions and electrochemical performances were investigated in detail. The results show that the composites with desirable constituents can be achieved by adjusting the molar ratio of the starting materials in the HCS process. Particularly, the HCS product of Mg67.7Ni32.3consists of the principal phase Mg2NiH4and minor phase Mg2NiH0.3. The dominate phase varies from Mg2NiH0.3and MgH2for the Mg enriched sample（x 32.3）. The MM modification not only brings about grain refinement of the alloys, but also leads to phase transformation of part Mg2NiH4to Mg2NiH0.3in the Mg67.7Ni32.3sample. Electrochemical tests indicate that each sample can reach its maximum discharge capacity at the first cycle. Mg67.7Ni32.3displays the highest discharge capacity as well as a superior electrochemical kinetics owing to its excellent H atom diffusion ability and lower charge-transfer resistance. The Mg67.7Ni32.3provides the most optimized Mg/Ni atomic ratio considering the comprehensive electrochemical properties of all samples.

关键词： Magnesium-based hydride Electrochemical performance Hydriding combustion synthesis

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FTP与商业银行利率传导效率研究

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新金融 2022年第12期 27-34页

作者：张吉光上海银行总行计划财务部

商业银行是货币政策利率传导的重要渠道,其传导效率既受到金融市场体系、监管政策等外部因素的影响,也受到定价机制等内部因素的影响。基于2009年1季度—2021年2季度18家上市银行的时间序列数据和微观调研数据,本文检验了内部资金转移定... 详细信息

商业银行是货币政策利率传导的重要渠道,其传导效率既受到金融市场体系、监管政策等外部因素的影响,也受到定价机制等内部因素的影响。基于2009年1季度—2021年2季度18家上市银行的时间序列数据和微观调研数据,本文检验了内部资金转移定价(FTP)对商业银行贷款利率传导效率的影响。本文研究发现,随着利率市场化的初步完成,我国的市场利率已能向商业银行贷款利率传导,但传导效率还不高,FTP对商业银行利率传导效率有重要影响。采用了市场化FTP的上市银行的利率传导效率显著高于采用非市场化FTP的上市银行,即市场化FTP能提高商业银行的利率传导效率。这一研究结论对于进一步推进利率市场化改革和完善价格型货币政策调控框架具有一定意义。

关键词：内部资金转移定价市场化利率传导定价机制

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上海临港数轨示范线列车进路防护方案

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城市轨道交通研究 2022年第S1期25卷 99-102页

作者：张继光上海电气集团智能交通科技有限公司上海200233

简要介绍了数字轨道交通系统(一种电子导向胶轮系统,简称“数轨”)的总体情况和技术特点,介绍了数轨关键子系统——列车运行控制和调度管理系统的功能和构成,分析了数轨列车进路安全防护的功能需求,详细介绍了上海临港数轨示范线的列车... 详细信息

简要介绍了数字轨道交通系统(一种电子导向胶轮系统,简称“数轨”)的总体情况和技术特点,介绍了数轨关键子系统——列车运行控制和调度管理系统的功能和构成,分析了数轨列车进路安全防护的功能需求,详细介绍了上海临港数轨示范线的列车进路安全防护功能实现方案和应用情况。研究结果表明:基于数字轨道列车精准定位的进路防护方案,应用于数字轨道交通系统是可行的。

关键词：城市轨道交通数字轨道交通系统进路防护

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Suppressed oxygen extraction and degradation of LiNixMnyCo2O2 cathodes at high charge cut-off voltages

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Nano Research 2017年第12期10卷 4221-4231页

作者： Jianming Zheng Pengfei Yan Jiandong zhang Mark H. Engelhard Zihua Zhu Bryant J. Polzin Steve Trask Jie Xiao Chongmin Wang jiguang zhang Energy and Environment Directorate Pacific Northwest National Laboratory 902 Battelle Boulevard Richland WA 99354 USA Environmental Molecular Sciences Laboratory Pacific Northwest National Laboratory 3335 Innovation Boulevard Richland WA 99354 USA Chemical Sciences and Engineering Division Argonne National Laboratory 9700 South Cass Avenue Argonne IL 60439 USA

The capacity degradation mechanism in lithium nickel-manganese-cobalt oxide （NMC） cathodes （LiNi1/3Mn1/3Co1/3O2 （NMC333） and LiNi0.4Mn0.4Co0.2O2 （NMC442）） during high-voltage （cut-off of 4.8 V） operation has been investigated. In contrast to NMC442, NMC333 exhibits rapid structural changes including severe micro-crack formation and phase transformation from a layered to a disordered rock-salt structure, as well as interfacial degradation during high-voltage cycling, leading to a rapid increase of the electrode resistance and fast capacity decline. The fundamental reason behind the poor structural and interracial stability of NMC333 was found to be correlated to its high Co content and the significant overlap between the Co3＋/4＋ t2g and O2- 2p bands, resulting in oxygen removal and consequent structural changes at high voltages. In addition, oxidation of the electrolyte solvents by the extracted oxygen species generates acidic species, which then attack the electrode surface and form highly resistive LiF. These findings highlight that both the structural and interfacial stability should be taken into account when tailoring cathode materials for high voltage battery systems.

关键词： layered structure high-voltage cycling structural stability interfacial stability material composition Li-ion battery

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Diversity of Fungal Endophytes in American Ginseng Seeds

Diversity of Fungal Endophytes in American Ginseng Seeds

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中国植物病理学会2023年学术年会

作者： zhang jiguang HU Hongyan LI Shuaihui SHANG Wenjing JIANG Jinlong XU Xiangming LIU Deming HU Xiaoping State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection Northwest A&F University

Seeds play a critical role in the production of American *** are also one of the most important media for the long-distant dissemination and the crucial way for pathogen *** out the pathogens carried by seeds is the basis for effective management of seed-borne *** this paper,we tested the fungi carried by the seeds of American ginseng from main production areas of China using incubation and highly throughput sequencing *** seed-carried rates of fungi in Liuba,Fusong,Rongcheng,and Wendeng were 100%,93.8%,75.2%,and 45.7%,***-seven fungal species,which belonged to twenty-eight genera,were isolated from the *** pathogens were identified from the seed *** the pathogens,Fusarium spp.,were found in all of the seed *** relative abundance of Fusarium *** the kernel was higher than that in the *** index showed that the fungal diversity between seed shell and kernel differed ***-metric multidimensional scaling analysis revealed that the samples from different provinces and between seed shell and kernel were distinctly *** inhibition rates of four fungicides to seed-carried fungi of American ginseng were 71.83% for tebuconazole SC,46.67% for azoxystrobin SC,46.08% for fludioxonil WP,and 11.11% for phenamacril ***,a conventional seed treatment agent,showed a low inhibitory effect on seed-carried fungi of American ginseng.

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计算机辅助翻译的译中效率提升方法研究

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浙江万里学院学报 2023年第5期36卷 85-92页

作者：张秀容张继光江苏师范大学江苏徐州221000

信息时代的飞速发展,国际交流与日俱增。这种趋势对语言翻译工作的效率、质量提出了更高要求。因此,传统的翻译模式无法满足越来越高的翻译需求。计算机辅助翻译作为当前时代技术发展的产物,对于翻译效率和质量的提升具有重要意义。虽... 详细信息

信息时代的飞速发展,国际交流与日俱增。这种趋势对语言翻译工作的效率、质量提出了更高要求。因此,传统的翻译模式无法满足越来越高的翻译需求。计算机辅助翻译作为当前时代技术发展的产物,对于翻译效率和质量的提升具有重要意义。虽然计算机辅助翻译已取得了突破性进展,但仍存在语料数据库不足、翻译质量有待提升等缺点。文章提出一种计算机辅助翻译的译中效率提升方法,基于4种在线翻译软件,借助神经网络模型TextCNN自动推荐较优译文再进行译后编辑。这种方法在减少人工翻译工作量、提高工作效率方面具有一定优势。

关键词：计算机辅助翻译 TextCNN 机器翻译翻译效率神经网络模型

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