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Insights into spin polarization regulated exciton dissociation and charge separation of C_(3)N_(4)for efficient hydrogen evolution and simultaneous benzylamine oxidation

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Nano Research 2023年第7期16卷 8845-8852页

作者： Gen Li Xiaomei Sun Peng Chen Meiyang Song tianxiang zhao Fei Liu Shuang-Feng Yin Provincial Guizhou Key Laboratory of Green Chemical and Clean Energy Technology School of Chemistry and Chemical EngineeringGuizhou UniversityGuiyang 550025China College of Chemistry and Chemical Engineering Advanced Catalytic Engineering Research Center of the Ministry of EducationState Key Laboratory of Chemo/Biosensing and ChemometricsHunan UniversityChangsha 410082China

The employment of spin polarization under an external magnetic field holds great potential for the improvements of photocatalytic performance.However,owing to the huge difference in dielectric properties between ferromagnetic oxide and polymers,the photogenerated excitons with spin states are often limited to the ferromagnetic oxide wells,which leads to unsatisfactory activity.In this paper,a single-atom Co-doped C_(3)N_(4)photocatalyst is successfully synthesized for photocatalytic water splitting and simultaneous oxidation of benzylamine.Under a tiny external magnetic field(24.5 mT),the hydrogen production rate could reach at 3979.0μmol·g^(-1)·h^(-1),which is about 340 times that of C_(3)N_(4).Experimental results and theoretical calculations indicate that the interaction of Co d and N p orbital changes the symmetry center of C_(3)N_(4),resulting in an increase in dielectric constant and spin polarization.Moreover,magnetic fields further promote parallel electron spin,and the increased number of charges with the parallel spin-down state is likely to dissociate under the action of an external magnetic field.On the other hand,the Co-N bond provides a huge built-in electric field and active site for strengthening the charge transfer and surface reaction.This work not only deepens the understanding of spin polarization,but also enriches methods to accelerate electron-hole separation.

关键词： low magnetic field C_(3)N_(4) spin polarization photocatalytic hydrogen evolution benzylamine oxidation

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Effect of Nd2O3 doping on the electrical properties of Ba0.96Ca0.04Ti0.90Sn0.10O3 ceramics

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Journal of Rare Earths 2018年第7期36卷 745-749页

作者： Zhihui Chen Zhiwei Li Minggang Ma tianxiang zhao Jianhua Qiu Jianning Ding School of Materials Science and Engineering Jiangsu Collaborative Innovation Center of Photovoltaic Science and EngineeringJiangsu Province Cultivation Base for State Key Laboratory of Photovoltaic Science and TechnologyChangzhou UniversityChangzhou 213164China Benxi Iron and Steel Company Limited Benxi 117100China

The Ba（0.96）Ca（0.04）Ti（0.90）Sn（0.10）O3-xNd2 O3（x = 0-0.08%） ceramics were prepared via traditional solid-state sintering method. The influences of Nd3＋ substitution on the phase structure, dielectric properties,piezoelectric and ferroelectric properties of the ceramics were investigated. All the samples possess pure BaTiO3-type perovskite structure. MPB with orthorhombic and tetragonal phase coexist at around x = 0.03-0.04. Nd^（3＋） doping decreases both Tc and T（O-T） to lower temperature. All the samples exhibit an intermediate state with the coexistence of ferroelectric and diffuse relaxor ferroelectric behavior with the addition of Nd^（3＋）. The electric properties of the ceramics were optimized at x = 0.03 with d33, Kp, εr and Pr values of 545 pC/N, 51.9%, 24,412 and 10.74 μC/cm^2.

关键词： Nd doped BCTS ceramics Piezoelectric properties Dielectric properties Ferroelectric properties Rare earths

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集约化养殖粪尿氮磷分布特征及耕地消纳潜力分析

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中国生态农业学报（中英文） 2024年第3期32卷 468-475页

作者：张建杰焦光月韩诗卉薛佳敏赵天翔杨晶山西农业大学资源环境学院太原030031 山西省畜牧技术推广服务中心太原030001 首都师范大学资源环境与旅游学院北京100048 中国科学院遗传与发育生物学研究所农业资源研究中心石家庄050022

分析集约化畜禽养殖场粪尿氮磷排放的空间分布特征,并定量评估耕地对粪尿养分的消纳能力,是促进粪尿养分资源合理利用的关键,也是制定环境保护政策的重要依据。本研究收集了山西省朔州市1576个集约化畜禽养殖场的空间分布数据,使用NUFER... 详细信息

分析集约化畜禽养殖场粪尿氮磷排放的空间分布特征,并定量评估耕地对粪尿养分的消纳能力,是促进粪尿养分资源合理利用的关键,也是制定环境保护政策的重要依据。本研究收集了山西省朔州市1576个集约化畜禽养殖场的空间分布数据,使用NUFER-Animal模型估算了养殖场的畜禽粪尿氮磷产生量;结合GIS手段分析了粪尿养分的空间分布特征,描述了粪尿氮磷产生的主要热点区域;通过遥感手段与GIS空间分析方法分别计算了耕地对粪尿氮磷的消纳程度与消纳半径,评估了各区县对于粪尿氮磷的消纳潜力。结果表明:朔州市畜禽粪尿氮磷产生量呈现东高西低的分布特征,主要集中在市域东部的3个区县,氮、磷总产生量分别为15.46 Gg、2.16 Gg,各占总产生量的80.93%、82.16%。全市耕地对于粪尿氮磷的消纳仍有较大潜力,按就近消纳原则对全部粪尿氮进行消纳,需要9.94万hm^(2)耕地满负荷承载,占全市耕地总面积的25.44%;对粪尿磷而言,则只需要4.69万hm^(2)耕地满负荷承载,占比12.00%;且粪尿氮、磷满负荷承载的耕地主要分布在市域东部的3个区县(怀仁市、应县与山阴县),分别为8.21万hm^(2)、3.93万hm^(2),各占总量的82.69%、83.92%。朔州全市粪尿氮磷绝大部分可以在半径3 km之内进行消纳。研究从畜禽养殖场规模和空间分布与耕地的空间位置关系出发,构建了一个评价畜禽粪污消纳程度的方法,能够更加客观地定量评价耕地对于养殖场粪尿氮磷的消纳程度,可为今后畜牧业的空间布局优化和相关环境政策评价提供科学依据。

关键词：集约化养殖场粪尿氮磷点源污染消纳潜力朔州市

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Polarization Reconfigurable Patch Antenna for Wireless Power Transfer Related Applications

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ZTE Communications 2022年第2期20卷 37-42页

作者： SHEN Jun zhao tianxiang LIU Xueguan Soochow University Suzhou 215006China

A polarized reconfigurable patch antenna is proposed in this paper.The proposed antenna is a dual cross-polarized patch antenna with a programmable power divider.The programmable power divider consists of two branch line couplers(BLC)and a digital phase shifter.By adjusting the phase of the phase shifter,the power ratio of the power divider can be changed,and thus the feed power to the antenna input port can be changed to reconfigure the antenna polarization.The phase-controlled power divider and the cross dual-polarized antenna are designed,fabricated and tested,and then they are combined to realize the polarized reconfigurable antenna.By moving the phase of the phase shifter,the antenna polarization is reconfigured into vertical polarization(VP),horizontal polarization(HP),and circular polarization(CP).The test is conducted at the frequency of 915 MHz,which is widely used for simultaneous wireless information and power transfer(SWIPT)in radio-frequency identification(RFID)applications.The results demonstrate that when the antenna is configured as CP,the axial ratio of the antenna is less than 3 dB,and when the antenna is configured as HP or VP,the axial ratio of the antenna exceeds 20 dB.Finally,experiments are conducted to verify the influence of antenna polarization changes on wireless power transmitting.As expected,the reconfigured antenna polarization can help improve the power transmitting efficiency.

关键词： power transfer branch line coupler polarization reconfigurable dual cross polarization antenna

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Eliminating H2O/HF and regulating interphase with bifunctional tolylene-2, 4-diisocyanate（TDI） additive for long life Li-ion battery

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Journal of Energy Chemistry 2024年第8期95卷 519-528页

作者： Xueyi Zeng Xiang Gao Peiqi Zhou Haijia Li Xin He Weizhen Fan Chaojun Fan tianxiang Yang Zhen Ma Xiaoyang zhao Junmin Nan School of Chemistry South China Normal University Guangzhou Tinci Materials Technology Co.Ltd. School of Environmental Engineering and Chemistry Luoyang Institute of Science and Technology School of Geomatic and Environmental Engineering Henan Polytechnic Institute

Lithium-ion batteries（LIBs） featuring a Ni-rich cathode exhibit increased specific capacity,but the establishment of a stable interphase through the implementation of a functional electrolyte strategy remains challenging.Especially when the battery is operated under high temperature,the trace water present in the electrolyte will accelerate the hydrolysis of the electrolyte and the resulting HF will further erode the interphase.In order to enhance the long-term cycling performance of graphite/LiNi0.8Co0.1Mn0.1O2（NCM811） LIBs,herein,Tolylene-2,4-diisocyanate（TDI） additive containing lone-pair electrons is employed to formulate a novel bifunctional electrolyte aimed at eliminating H2O/HF generated at elevated temperature.After 1000 cycles at 25℃,the battery incorporating the TDI-containing electrolyte exhibits an impressive capacity retention of 94% at 1 C.In contrast,the battery utilizing the blank electrolyte has a lower capacity retention of only 78%.Furthermore,after undergoing 550 cycles at 1 C under45℃,the inclusion of TDI results in a notable enhancement of capacity,increasing it from 68% to 80%.This indicates TDI has a favorable influence on the cycling performance of LIBs,especially at elevated temperatures.The analysis of the film formation mechanism suggests that the lone pair of electrons of the isocyanate group in TDI play a crucial role in inhibiting the generation of H2O and HF,which leads to the formation of a thin and dense interphase.The existence of this interphase is thought to substantially enhance the cycling performance of the LIBs.This work not only improves the performance of graphite/NCM811 batteries at room temperature and high temperature by eliminating H2O/HF but also presents a novel strategy for advancing functional electrolyte development.

关键词： 4-diisocyanate Graphite/LiNi0.8Co0.1Mn0.1O2 battery H2O/HF eliminated additive Long-cycling performance Tolylene-2

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Experiments and reaction characteristics of liquid phase simultaneous removal of SO_2 and NO

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Science China(Technological Sciences) 2009年第6期52卷 1768-1775页

作者： zhao Yi,LIU Feng,GUO tianxiang & zhao Yin School of Environmental Science and Engineering,North China Electric Power University,Baoding 071003,China School of Environmental Science and Engineering North China Electric Power University Baoding China

Experiments of simultaneous removal of SO2 and NO from simulated flue gas,using NaClO2 solution as the absorbent,were carried out in a self-designed bubble reactor,and high simultaneous removal effi-ciencies of SO2 and NO were obtained under the optimal experimental conditions.The mechanism of simultaneous removal based on NaClO2 acid solutions was proposed by analyzing the removal prod-ucts.Possibility and limitation of the desulfurization and denitrification using NaClO2 acid solutions were calculated by thermodynamic methods.Experimental results of reaction kinetics for simultaneous desulfurization and denitrification indicated that the oxidation-absorption processes of SO2 and NO were divided into two zones,namely the fast and slow reaction zones.In the slow reaction zones both were zero order reactions,and in the fast reaction zones,the reaction order,rate constant and activa-tion energy of SO2 reaction with absorbent were 1.4,1.22(mol.L-1)-0.4.s-1 and 66.25kJ.mol-1,respec-tively,and 2,3.15×103(mol.L-1)-1.s-1,and 42.50 kJ.mol-1 for NO reaction,respectively.

关键词： sodium chlorite simultaneous removal of SO2 and NO kinetics experiments

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微生物降解玉米赤霉烯酮的研究进展

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微生物学报 2023年第10期63卷 3711-3726页

作者：赵天祥余祖华丁轲廖成水河南科技大学洛阳市活载体生物材料与动物疫病防控重点实验室河南洛阳471023 河南科技大学动物科技学院功能微生物与畜禽健康实验室河南洛阳471023

玉米赤霉烯酮(zearalenone,ZEN)是霉变谷物中常见的霉菌毒素之一,主要出现在霉变的玉米、小麦等谷物中,给畜禽和人类带来一定程度的健康危害,如生殖毒性、免疫毒性、肝毒性和肾毒性等。目前,解决玉米赤霉烯酮污染问题的方法包括物理、... 详细信息

玉米赤霉烯酮(zearalenone,ZEN)是霉变谷物中常见的霉菌毒素之一,主要出现在霉变的玉米、小麦等谷物中,给畜禽和人类带来一定程度的健康危害,如生殖毒性、免疫毒性、肝毒性和肾毒性等。目前,解决玉米赤霉烯酮污染问题的方法包括物理、化学和生物3个途径。虽然传统的物理和化学脱毒方法已经运用在许多的饲料生产中,但同时也存在着二次污染的风险。生物降解法是一种利用微生物吸附和降解玉米赤霉烯酮的脱毒方法,具有安全环保、高效、特异性强和脱毒率高的特性,且不影响谷物的营养价值,已成为玉米赤霉烯酮降解研究的热点。本文主要介绍了近年来降解玉米赤霉烯酮的微生物种类,并将其归纳分类,从微生物的脱毒能力、脱毒方法和脱毒产物进行了叙述,综述了微生物脱毒的优点及前景,以期为微生物降解玉米赤霉烯酮的理论研究及实际应用提供新的视角。

关键词：微生物玉米赤霉烯酮降解吸附

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Nonlinear photonic quasi-periodic spiral

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Chinese Optics Letters 2024年第3期22卷 112-117页

作者：曾静王森赵如薇刘永兴徐铁峰盛艳徐天翔 Laboratory of Infrared Materials and Devices Research Institute of Advanced TechnologiesNingbo UniversityNingbo 315211China Zhejiang Key Laboratory of Photoelectric Materials and Devices Ningbo UniversityNingbo 315211China Ningbo Institute of Oceanography Ningbo 315832China Department of Quantum Science and Technology Research School of PhysicsAustralian National UniversityCanberraACT 2601Australia

The design of nonlinear photonic Vogel's spiral based on quasi-crystal theory was demonstrated.Two main parameters of Vogel's spiral were arranged to obtain multi-reciprocal circles.Typical structure was fabricated by the near-infrared femtosecond laser poling technique,forming a nonlinear photonic structure,and multiple ring-like nonlinear Raman±Nath second-harmonic generation processes were realized and analyzed in detail.The structure for the cascaded thirdharmonic generation process was predicted.The results could help deepen the understanding of Vogel's spiral and quasi-crystal and pave the way for the combination of quasi-crystal theory with more aperiodic structures.

关键词： nonlinear photonic quasi-crystal second-harmonic generation Vogel's spiral nonlinear Raman-Nath diffraction femtosecond laser poling

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结直肠侧向发育型肿瘤的内镜特征及癌变与黏膜下浸润的危险因素分析

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中华消化内镜杂志 2023年第8期40卷 639-647页

作者：赵天翔张凤娟孙明军中国医科大学附属第一医院内镜科沈阳110000

目的观察结直肠侧向发育型肿瘤(laterally spreading tumors,LST)的内镜及病理学特征,探索其癌变、黏膜下浸润的危险因素。方法回顾性分析2019年1月至2021年8月在中国医科大学附属第一医院因结直肠LST行内镜治疗患者的性别、年龄及病变... 详细信息

目的观察结直肠侧向发育型肿瘤(laterally spreading tumors,LST)的内镜及病理学特征,探索其癌变、黏膜下浸润的危险因素。方法回顾性分析2019年1月至2021年8月在中国医科大学附属第一医院因结直肠LST行内镜治疗患者的性别、年龄及病变的内镜和病理学特征。用单因素分析寻找癌变、黏膜下浸润的危险因素,对其中差异有统计学意义的因素再纳入多因素Logistic回归分析。结果纳入422例患者,男224例、女198例,年龄(63.45±9.23)岁。共456处LST病灶,内镜切除标本长径(3.01±0.48)cm,病灶长径(2.37±1.59)cm,位于直肠115处(25.2%)、乙状结肠40处(8.8%)、降结肠26处(5.7%)、横结肠109处(23.9%)、升结肠112处(24.6%)、回盲部54处(11.8%)。予内镜黏膜下剥离术(endoscopic submucosal dissection,ESD)237处(52.0%),内镜黏膜切除术(endoscopic mucosal resection,EMR)95处(20.8%),预切开EMR(EMR with pre-cutting,EMR-P)113处(24.8%),圈套器辅助ESD(ESD with snare,ESD-S)11处(2.4%),共4处迟发性出血,5处术中穿孔。病理结果:低级别上皮内瘤变119处(26.1%),高级别上皮内瘤变221处(48.5%),黏膜内癌82处(18.0%),黏膜下浸润癌34处(7.5%)。多因素logistic回归分析显示,病灶大小(>2 cm)、病灶位置(直肠)、内镜分型[假凹陷型(LST-NG pseudodepressed type,LST-NG-PD)、颗粒均一型(LST-G homogenous type,LST-G-H)、结节混合型(LST-G nodular mixed type,LST-G-M)]、伴大结节(有)这4项为癌变的独立危险因素;内镜分型(LST-NG-PD)、伴大结节(有)这2项为黏膜下浸润的独立危险因素。结论LST的4种亚型,其内镜和病理特征存在明显差异,病灶大小、病灶位置、内镜分型、伴大结节,均为癌变的独立危险因素;内镜分型、伴大结节,为黏膜下浸润的独立危险因素。内镜治疗LST并发症少、安全有效,不同的内镜治疗方法各有优势。

关键词：结直肠肿瘤肿瘤浸润侧向发育型肿瘤内镜黏膜下剥离术内镜黏膜切除术

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八盘峡水电厂5号机组改造及D179a型转轮的应用

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水力发电 1999年第9期25卷 34-35页

作者：赵天向八盘峡水电厂兰州730094

Ｄ１７９ａ水轮机转轮是东方电机厂在八盘峡水电厂５号水轮机改造过程中，研制的一个性能优良的模型转轮。实践证明该转轮比瑞典原ＫＶ４转轮大流量区的效率明显提高，空蚀性能优良，其最优工况点效率可比原转轮提高２２％ ... 详细信息

Ｄ１７９ａ水轮机转轮是东方电机厂在八盘峡水电厂５号水轮机改造过程中，研制的一个性能优良的模型转轮。实践证明该转轮比瑞典原ＫＶ４转轮大流量区的效率明显提高，空蚀性能优良，其最优工况点效率可比原转轮提高２２％，设计点的效率在９２％左右，是２０ｍ水头段性能优良的转轮之一。Ｄ１７９ａ水轮机转轮在八盘峡水电厂５号水轮机改造的情况和现场试验的结果，可供其他水轮机改造和优化时参考。

关键词：水轮机转轮改造增容水电厂机组

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