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纤维素科学与技术 2004年第3期12卷 31-35页

作者：丁宏贵李岚沈晓沈青东华大学材料科学与工程学院上海200051 东华大学分析测试中心上海200051 东华大学纤维材料改性国家重点实验室

采用湿法纺丝技术制备了纤维素/聚乙二醇/生姜共混纤维。由于生姜是一种药物,故这种共混纤维也可以被认为是一种药物纤维。纤维强伸度测试表明该药物纤维的力学性能可以满足进一步加工与应用的要求;而在蒸馏水中的缓释性能的初步研究发... 详细信息

采用湿法纺丝技术制备了纤维素/聚乙二醇/生姜共混纤维。由于生姜是一种药物,故这种共混纤维也可以被认为是一种药物纤维。纤维强伸度测试表明该药物纤维的力学性能可以满足进一步加工与应用的要求;而在蒸馏水中的缓释性能的初步研究发现其缓释效果也非常明显。研究中还对所制备的药物纤维进行了差示扫描量热仪(DSC)和红外光谱的测试。

关键词：高分子药物缓释材料湿法纺丝纤维素/聚乙二醇/生姜共混纤维药物纤维差示扫描量热仪红外光谱力学性能结构

Multifunctional dual-anion compensation of amphoteric glycine hydrochloride enabled highly stable perovskite solar cells with prolonged carrier lifetime

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Nano Research 2024年第6期17卷 5131-5137页

作者： Lina Qin Mengfei Zhu Yuren Xia Xingkai Ma Daocheng hong Yuxi Tian Zuoxiu Tie Zhong Jin state key laboratory of Coordination Chemistry MOE Key Laboratory of Mesoscopic ChemistryMOE Key Laboratory of High Performance Polymer Materials and TechnologyJiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China nanjing Tieming Energy technology Co.Ltd. Nanjing 210093China Suzhou Tierui New Energy technology Co.Ltd. Suzhou 215228China

Throughout years,the two-step spin-coating process is the most common method to prepare organic lead halide perovskite ***,the short reaction time of dropping the solution at the second step means that PbI2 cannot be completely transformed into perovskite *** solve this problem,we report the introduction of glycine hydrochloride(GlyHCl)into the second step of the two-step spin-coating process to prepare a FA_(0.9)MA_(0.1)PbI_(3-x)%-GlyHCl perovskite material(namely FAMA-x%-GlyHCl,where FA=formamidinium,MA=methylammonium,and x%stands for the molar ratio of GlyHCl added in FA iodide/MA iodide(FAI/MAI)precursor solution).The Cl−ion in GlyHCl assists the formation ofα-phase perovskite,and the-COO−group coordinates with Pb2+cation in a bridging way,making up for the anion vacancy in perovskite lattice and resulting in high absorption *** perovskite solar cells(PSCs)based on FAMA-9%-GlyHCl achieve a long carrier lifetime(527.0 ns),a photoelectric conversion efficiency(PCE)of 19.40%and good thermal stability,maintaining 85.8%of the initial PCE after being continuously heated at 60℃for 500 *** study helps to solve the problem of incomplete reaction in the two-step spin-coating process and puts forward a new solution for preparing high coverage perovskite films with large grain size.

关键词： dual-anion compensation glycine hydrochloride perovskite solar cells carrier lifetime thermal and moisture stability

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竹纤维的表面化学特性及与棉纤维的比较

纤维素科学与技术 2004年第2期12卷 6-9,22页

作者：陈莹高苑沈青东华大学材料科学与工程学院

报道了竹纤维的表面化学性能,如:表面能、Lifshitz-vanderWaals力、Lewis酸性和碱性。为了认识竹纤维的表面性能,同时还对棉纤维的表面性能进行了测试以作对比。结果表明,竹纤维的表面性能与棉纤维基本相同,但两者具有一个非常明显的差... 详细信息

报道了竹纤维的表面化学性能,如:表面能、Lifshitz-vanderWaals力、Lewis酸性和碱性。为了认识竹纤维的表面性能,同时还对棉纤维的表面性能进行了测试以作对比。结果表明,竹纤维的表面性能与棉纤维基本相同,但两者具有一个非常明显的差异,即前者的Lewis酸性是后者的一倍。这个发现极好地解释了人体皮肤在夏天接触竹纤维时感到舒适的现象。研究还指出,竹纤维的取向性略差于棉纤维,这可能会导致竹纤维的柔软性、面料性能略逊于棉纤维。

关键词：棉纤维竹纤维表面性能天然生物材料柱状灯芯技术

Efficient Photolytic Halogenation and Oxidation of Unactivated Alkyl sp^(3) C—H Bonds with Iodine(III)

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Chinese Journal of Chemistry 2024年第5期42卷 505-510页

作者： Hao Jia Nan Li Chunmei Tang Yajuan Wang Yonghao Xi Rongbao Liao Wei Xu Fufang Wu xiaobao shen hongbin Zhai Biomass Oligosaccharides engineering technology Research Center of Anhui Province Engineering Research Center of Biomass Conversion and Pollution Prevention of Anhui Educational InstitutionsFuyang Normal UniversityFuyangAnhui236037 China Institute of Marine Biomedicine Shenzhen PolytechnicShenzhenGuangdong518055 China state key laboratory of chemical Oncogenomics Shenzhen Engineering Laboratory of Nano Drug Slow-ReleasePeking University Shenzhen Graduate SchoolShenzhenGuangdong518055 China

A metal-free,green,and sustainable functionalization of unactivated alkyl sp^(3) C—H bonds is reported using iodine(III)as a feasible dehydrogenation agent under visible light or KBr,and alkyl chlorides,bromides,alcohols,and ketones could be constructed by addition of different coupling *** and safe iodobenzene diacetate was used to form a radical to activate the alkyl sp^(3) C—H bond in a highly efficient manner,which can construct different alkylation products by adding corresponding coupling reagents.

关键词： Alkyl sp^(3)C—H bonds Chlorination Bromination Oxidation Iodine(III) C—H activation Radical Photocatalysis

Biochar-based composites for removing chlorinated organic pollutants: Applications, mechanisms, and perspectives

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Environmental science and Ecotechnology 2024年第5期21卷 47-61页

作者： Qingqing Song Fanying Kong Bing-Feng Liu Xueting Song hong-Yu Ren state key laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin150090China School of Water Conservancy and Civil engineering Northeast Agricultural UniversityHarbin150030China

Chlorinated organic pollutants constitute a significant category of persistent organic pollutants due to their widespread presence in the environment,which is primarily attributed to the expansion of agricultural and industrial *** pollutants are characterized by their persistence,potent toxicity,and capability for long-range dispersion,emphasizing the importance of their eradication to mitigate environmental *** conventional methods for removing chlorinated organic pollutants encompass advanced oxidation,catalytic oxidation,and bioremediation,the utilization of biochar has emerged as a prominent green and efficacious method in recent *** we review biochar's role in remediating typical chlorinated organics,including polychlorinated biphenyls(PCBs),triclosan(TCS),trichloroethene(TCE),tetrachloroethylene(PCE),organochlorine pesticides(OCPs),and chlorobenzenes(CBs).We focus on the impact of biochar material properties on the adsorption mechanisms of chlorinated *** review highlights the use of biochar as a sustainable and eco-friendly method for removing chlorinated organic pollutants,especially when combined with biological or chemical *** facilitates electron transfer efficiency between microorganisms,promoting the growth of dechlorinating bacteria and mitigating the toxicity of chlorinated organics through ***,biochar can activate processes such as advanced oxidation or nano zero-valent iron,generating free radicals to decompose chlorinated organic *** observe a broader application of biochar and bioprocesses for treating chlorinated organic pollutants in soil,reducing environmental ***,for water-based pollutants,integrating biochar with chemical methods proved more effective,leading to superior purification *** review contributes to the theoretical and practical application of biochar for removing environmental chlorinated organic pollutants.

关键词： Biochar Chlorinated organic pollutants Polychlorinated biphenyls Triclosan Trichloroethene

Self-assembled Nanoscaled Polyaniline Nanofibers(～10nm):Preparation and Properties

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Self-assembled Nanoscaled Polyaniline Nanofibers(～10nm):Pre...

全国第八届有机固体电子过程暨华人有机光电功能材料学术讨论会

作者： Hangjun Ding~(a,*),Yunze Long~b,Jiaoyan shen~c,Meixiang Wan~(d,*) (a School of material science and engineering,university of science and technology Beijing,Beijing 100083) (b college of Physics science,Qingdao university,Qingdao 266071) (c School of Mathematics and Physics,Suzhou university of science and technology,Suzhou 215011) (d Organic Solid laboratory,Institute of Chemistry,Chinese Academy of sciences,Beijing 100190)

One-dimensional(1 D) conducting polymer nanostructures with a diameter of 1-100 nm have recently received great attention in nano-science and *** we know,nano-materials are characterized by large surface area,size and quantum effect that results in physical and chemical properties of nano-materials different from their bulk *** developing facial and controlling method to conducting polymer nanostructures

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一锅法全细胞催化合成胞苷三磷酸的研究

现代化工 2024年第4期44卷 169-174页

作者：沈来伟任宇红华东理工大学生物工程学院生物反应器工程国家重点实验室上海200237

分别在大肠杆菌BL21(DE3)中构建胞苷激酶(CDK)与乙酸激酶(ACK)的共表达及融合表达体系和胞苷酸激酶(CMK)与乙酸激酶(ACK)的融合表达体系,其中融合菌株SUMO-CDK-L2-ACK与CMK-L2-ACK构成的双融合催化体系具有较好的催化活性。搭建了双融... 详细信息

分别在大肠杆菌BL21(DE3)中构建胞苷激酶(CDK)与乙酸激酶(ACK)的共表达及融合表达体系和胞苷酸激酶(CMK)与乙酸激酶(ACK)的融合表达体系,其中融合菌株SUMO-CDK-L2-ACK与CMK-L2-ACK构成的双融合催化体系具有较好的催化活性。搭建了双融合菌全细胞一锅法催化合成胞苷三磷酸(CTP)反应体系,并对其温度、pH、金属离子、乙酰磷酸投加量及菌粉投加量等进行优化。结果表明,在优化反应体系中,反应75 min时CTP产量达到最高为108 mmol/L,总收率达86.4%,实现了CTP的一锅法高效合成。

关键词：胞苷三磷酸全细胞催化一锅法合成共表达融合表达

Concentration Characteristics and Sources of chemical Elements in Atmospheric Fine Particles (PM_(2.5)) in Autumn in Xi'an City

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Meteorological and Environmental Research 2011年第4期2卷 5-8页

作者： GAN xiao-feng1,2, CAO Jun-ji2,3, WANG Qi-yuan4, shen Zhen-xing4, XU hong-mei2 1. Department of Environmental science and technology, Xi’an Jiaotong university, Xi’an 710049, china 2. state key laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of sciences, Xi’an 710075, china 3. Institute of Global Environmental Change, Xi’an Jiaotong university, Xi’an 710049, china 4. Department of Environmental engineering, Xi’an Jiaotong university, Xi’an 710049, china

[Objective] The aim was to study the concentration characteristics and sources of chemical elements in atmospheric fine particles (PM2.5) in autumn in Xi’an City. [Method] By means of mini-volume sampler, PM2.5 samples in atmosphere in Xi’an were collected in October 2009, and the concentration characteristics and sources of elements in PM2.5 were analyzed. [Result] The average mass concentration of PM2.5 in atmosphere in autumn in Xi’an City was 168.44 μg/m3 which was higher than that of Beijing and Pearl River Delta area, and the minimum and maximum value were 53.29 and 358.16 μg/m3, respectively. The mass concentration of S, Zn, K, Cl, Ca and Fe in PM2.5 was above 1.0 μg/m3, being at high pollution level. In addition, K had obvious correlation with organic carbon (OC) and element carbon (EC), with the correlation coefficients of 0.76 and 0.75 (Pchemical industry and dust were the main sources of PM2.5 in autumn in Xi’an. [Conclusion] The study could provide theoretical foundation for the control of urban environmental pollution.

关键词： Atmospheric fine particles chemical element Enrichment factor Factor analysis china

Anisotropy-free arrayed waveguide gratings on X-cut thin film lithium niobate platform of in-plane anisotropy

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Light(science & Applications) 2024年第7期13卷 1416-1426页

作者： Junjie Yi Changjian Guo Ziliang Ruan Gengxin Chen Haiqiang Wei Liwang Lu shengqi Gong xiaofu Pan xiaowan shen xiaowei Guan Daoxin Dai Kangping Zhong Liu Liu state key laboratory of Extreme Photonics and Instrumentation College of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZhejiang UniversityHangzhou 310058China. Guangdong Provincial key laboratory of Optical Information materials and technology South China Academy of Advanced OptoelectronicsSouth China Normal UniversityHigher-Education Mega-CenterGuangzhou 510006China. National Center for International Research on Green Optoelectronics South China Normal UniversityGuangzhou 510006China Photonics Research Institute Department of Electrical and Electronic EngineeringThe Hong Kong Polytechnic UniversityHung HomKowloonHong Kong(SAR)China. Jiaxing key laboratory of Photonic Sensing&Intelligent Imaging Intelligent Optics&Photonics Research CenterJiaxing Research Institute Zhejiang UniversityJiaxing 314000China

Arrayed waveguide grating is a versatile and scalable integrated light dispersion device,which has been widely adopted in various applications,including,optical communications and optical ***,thin-film lithium niobate emerges as a promising photonic integration platform,due to its ability of shrinking largely the size of typical lithium niobate based optical *** would also enable multifunctional photonic integrated chips on a single lithium niobate ***,due to the intrinsic anisotropy of the material,to build an arrayed waveguide grating on X-cut thin-film lithium niobate has never been ***,a universal strategy to design anisotropyfree dispersive components on a uniaxial in-plane anisotropic photonic integration platform is introduced for the first *** leads to the first implementation of arrayed waveguide gratings on X-cut thin-film lithium niobate with various configurations and *** best insertion loss of 2.4 dB and crosstalk of−24.1 dB is obtained for the fabricated arrayed waveguide grating *** of such arrayed waveguide gratings as a wavelength router and in a wavelength-division multiplexed optical transmission system are also demonstrated.

关键词： waveguide arrayed lithium