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Covalent organic hollow nanospheres constructed by using AIEactive units for nitrophenol explosives detection

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Science China Chemistry 2020年第4期63卷 497-503页

作者： Shan Jiang shengda Liu Lingchen Meng Qingkai Qi Lipeng Wang Bin Xu Junqiu Liu Wenjing Tian State Key Laboratory of Supramolecular Structure and Materials Jilin UniversityChangchun 130000China

The development of conjugated nanomaterials with high sensitivity and super-amplified quenching effect for the detection of nitrophenol explosives is still a great challenge. Herein, we developed conjugated hollow nanospheres constructed by using aggregation-induced emission(AIE) active 1,3,5-tris(4-formyl-phenyl)benzene(TFPB). The high emission hollow nanospheres with uniform size and admirable dispersiveness exhibited obvious fluorescence quenching response with the addition of nitrophenol explosives owing to the photoinduced electron transfer(PET) from the hollow nanospheres to nitrophenol explosives. The Stern-Volmer constants of hollow spheres for 2,4,6-trinitrophenol(TNP), 4-nitrophenol(NP) and 2,4-dinitrophenol(DNP) can reach 9.67×10^5, 3.14×10^5 and 4.8×10^4 M-1, respectively. Furthermore, the handy test paper coated with hollow nanospheres was prepared and showed a good response toward TNP solutions and vapor. The study provides a novel strategy to construct AIE-active conjugated hollow nanospheres for efficient nitrophenol explosives sensing.

关键词： aggregation-induced emission covalent organic nanospheres nitrophenol explosives detection fluorescence quenching

Comparing dark-and photo-Fenton-like degradation of emerging pollutant over photo-switchable Bi2WO6/CuFe2O4: Investigation on dominant reactive oxidation species

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Journal of Environmental Sciences 2021年第8期33卷 147-160页

作者： Jingjing Jiang Jiaying Gao Shu Niu Xingyue Wang Tianren Li shengda Liu Yanhong Lin Tengfeng Xie Shuangshi Dong Key Laboratory of Groundwater Resources and Environment Ministry of EducationJilin UniversityChangchun 130021China Jilin Provincial Key Laboratory of Water Resources and Environment Jilin UniversityChangchun 130021China College of Chemistry Jilin UniversityChangchun 130012

The extensive use of tetracycline hydrochloride(TCH)poses a threat to human health and the aquatic ***,magnetic p-n Bi2WO6/CuFe2O4 catalyst was fabricated to efficiently remove *** obtained Bi2WO6/CuFe2O4 exhibited 92.1%TCH degradation efficiency and 50.7%and 35.1%mineralization performance for TCH and raw secondary effluent from a wastewater treatment plant in a photo-Fenton-like system,*** remarkable performance was attributed to the fact that photogenerated electrons accelerated the Fe(III)/Fe(II)and Cu(II)/Cu(I)conversion for the Fenton-like reaction between Fe(II)/Cu(I)and H2O2,thereby generating abundant·OH for pollutant *** environmental factors including H2O2 concentration,initial pH,catalyst dosage,TCH concentration and inorganic ions were *** reactive oxidation species(ROS)quenching results and electron spin resonance(ESR)spectra confirmed that·O2-and·OH were responsible for the dark and photo-Fenton-like systems,*** degradation mechanisms and pathways of TCH were proposed,and the toxicity of products was *** work contributes a highly efficient and environmentally friendly catalyst and provides a clear mechanistic explanation for the removal of antibiotic pollutants in environmental remediation.

关键词： Magnetic Bi2WO6/CuFe2O4 Tetracycline hydrochloride Degradation Reactive oxidation species Toxicity assessment

健脾消瘿方对桥本甲状腺炎模型小鼠Th1、Th17的影响

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上海中医药大学学报 2024年第2期38卷 43-51页

作者：刘梦冉田胜达张宏利李晓华上海中医药大学附属第七人民医院内分泌科上海200137

目的:探讨健脾消瘿方是否通过调控辅助性T细胞(Th)比例改善桥本甲状腺炎(HT)。方法:将40只雌性CBA/J小鼠随机分为5组:正常对照组、模型对照组及健脾消瘿方低、中、高剂量组,每组8只。除正常对照组外,其他小鼠采用皮下注射猪甲状腺球蛋... 详细信息

目的:探讨健脾消瘿方是否通过调控辅助性T细胞(Th)比例改善桥本甲状腺炎(HT)。方法:将40只雌性CBA/J小鼠随机分为5组:正常对照组、模型对照组及健脾消瘿方低、中、高剂量组,每组8只。除正常对照组外,其他小鼠采用皮下注射猪甲状腺球蛋白联合高碘水喂养诱导HT模型。造模结束后,正常对照组与模型对照组小鼠每天给予0.5 mL饮用水灌胃,健脾消瘿方低、中、高剂量组小鼠每天给予健脾消瘿方颗粒剂水溶液(剂量分别为8.632 g/kg、17.264 g/kg、34.528 g/kg)灌胃,连续6周。干预结束后,采用酶联免疫吸附试验(ELISA)检测小鼠血清甲状腺过氧化物酶抗体(TPOAb)、甲状腺球蛋白抗体(TGAb)、游离三碘甲状腺原氨酸(FT3)、游离甲状腺素(FT4)、促甲状腺素(TSH)水平;采用流式细胞术检测小鼠外周血Th1、Th2、Th17、调节性T细胞(Treg)比例;采用实时荧光定量PCR检测肿瘤坏死因子-α(TNF-α)、γ干扰素(IFN-γ)、白介素-17(IL-17)、T-bet、RORγ-t基因表达;采用Western blot法检测脾脏组织T-bet、RORγ-t蛋白表达;苏木素-伊红(HE)染色观察甲状腺组织病理形态学变化。结果:(1)与模型对照组相比,健脾消瘿方高剂量组小鼠血清TPOAb水平显著降低(P<0.05),健脾消瘿方低、高剂量组小鼠的TGAb水平亦显著降低(P<0.05)。(2)与模型对照组相比,健脾消瘿方高剂量组小鼠血清FT3、FT4水平明显上升(P<0.05)。(3)健脾消瘿方可改善HT模型小鼠的甲状腺滤泡结构和滤泡胶质,使滤泡形态趋于规则,减轻甲状腺滤泡间淋巴细胞及浆细胞的浸润程度。(4)与模型对照组相比,健脾消瘿方低、中、高剂量组小鼠的外周血Th1比例均显著下降(P<0.05),健脾消瘿方低、高剂量组小鼠的Th17比例亦显著降低(P<0.05)。(5)与模型对照组相比,健脾消瘿方低、中、高剂量组小鼠的脾脏组织T-bet、RORγ-t基因相对表达量明显下降(P<0.05),健脾消瘿方高剂量组的T-bet、RORγ-t蛋白表达显著下降(P<0.05),健脾消瘿方中剂量组的T-bet蛋白表达显著下降(P<0.05)。(6)与模型对照组相比,健脾消瘿方各剂量组小鼠的TNF-α、IFN-γ、IL-17基因相对表达量均明显降低(P<0.05)。结论:健脾消瘿方能通过下调Th1、Th17的转录分化及其相关炎症因子的分泌,抑制炎症反应,从而改善HT。

关键词：桥本甲状腺炎健脾消瘿方辅助性T细胞1 辅助性T细胞17

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流化床用微球催化剂磨损研究

应用化工 2024年第8期53卷 1955-1960页

作者：于万金肖新宝林胜达刘敏洋刘创刘武灿张建君浙江省化工研究院含氟温室气体替代及控制处理国家重点实验室浙江杭州310023 蓝启生科(浙江)新材料有限公司浙江杭州311228

介绍了流化床催化剂颗粒磨损类型、磨损测试及磨损机理模型分析三方面的研究进展;综述了催化剂颗粒磨损的时变规律及各因素对其磨损的影响,指出今后应加强对热力磨损、化学磨损、微观磨损机理的研究,建立更加完善的动力学模型,为流化床... 详细信息

介绍了流化床催化剂颗粒磨损类型、磨损测试及磨损机理模型分析三方面的研究进展;综述了催化剂颗粒磨损的时变规律及各因素对其磨损的影响,指出今后应加强对热力磨损、化学磨损、微观磨损机理的研究,建立更加完善的动力学模型,为流化床技术改进提供指导。

关键词：微球催化剂磨损表面磨损体相断裂机理模型

EXISTENCE AND CONVERGENCE RESULTS FOR AN ELASTIC FRICTIONAL CONTACT PROBLEM WITH NONMONOTONE SUBDIFFERENTIAL BOUNDARY CONDITIONS

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Acta Mathematica Scientia 2021年第4期41卷 1151-1168页

作者： Yongjian LIU Stanisiaw MIGÓRSKI Van Thien NGUYEN shengda ZHENG Guangxi Colleges and Universities Key Laboratory of Complex System Optimization and Big Data Processing Yulin Normal UniversityYulin 537000China College of Applied Mathematics Chengdu University of Information TechnologyChengdu 610225China Jagiellonian University in Krakow Chair of Optimization and Controlul.Lojasiewicza 630348 KrakowPoland Departement of Mathematics FPT UniversityEducation ZoneHoa Lac High Tech ParkKm29 Thang Long HighwayThach That WardHanoiVietnam

The goal of this paper is to study a mathematical model of a nonlinear static frictional contact problem in elasticity with the mixed boundary conditions described by a combination of the Signorini unilateral frictionless contact condition,and nonmonotone multivalued contact,and friction laws of subdifferential ***,under suitable assumptions,we deliver the weak formulation of the contact model,which is an elliptic system with Lagrange multipliers,and which consists of a hemivariational inequality and a variational ***,we prove the solvability of the contact ***,employing the notion of H-convergence of nonlinear elasticity tensors,we provide a result on the convergence of solutions under perturbations which appear in the elasticity operator,body forces,and surface tractions.

关键词： Mixed variational-hemi variational inequality H-convergence homogenization Clarke subgradient Lagrange multiplier elasticity operator

ZnO-PCBM bilayers as electron transport layers in low-temperature processed perovskite solar cells

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Science Bulletin 2018年第6期63卷 343-348页

作者： Jiaqi Zhang Ching Hong Tan Tian Du Maurizio Morbidoni Chieh-Ting Lin shengda Xu James R.Durrant Martyn A.McLachlan Department of Materials and Centre for Plastic Electronics Imperial College London Department of Chemistry and Centre for Plastic Electronics Imperial College London

We investigate an electron transport bilayer fabricated at 〈110℃ to form all low-temperature processed, thermally stable, efficient perovskite solar cells with negligible hysteresis. The components of the bilayer create a symbiosis that results in improved devices compared with either of the components being used in isolation. A sol-gel derived ZnO layer facilitates improved energy level alignment and enhanced charge carrier extraction and a [6,6]-phenyl-C61-butyric acid methyl ester （PCBM） layer to reduce hysteresis and enhance perovskite thermal stability. The creation of a bilayer structure allows materials that are inherently unsuitable to be in contact with the perovskite active layer to be used in efficient devices through simple surface modification strategies.

关键词： Hybrid perovskite Solar cell Electron transport layer Metal oxide

In-situ and one-step preparation of protein film in capillary column for open tubular capillary electrochromatography enantioseparation

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Chinese Chemical Letters 2021年第7期32卷 2139-2142页

作者： Ling Li Xuqi Xue Huige Zhang Wenjuan Lv shengda Qi Hongying Du Anne Manyande Hongli Chen State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University Key Laboratory of Environment Correlative Dietology Ministry of EducationCollege of Food Science and TechnologyHuazhong Agricultural University School of Human and Social Sciences University of West London

In this wo rk,the phase-transitioned BSA(PTB)film using the mild and fast fabrication process adhered to the capillary inner wall uniformly,and the fabricated PTB film-coated capillary column was applied to realize open tubular capillary electrochromatography(OT-CEC)*** enantioseparation ability of PTB film-coated capillary was evaluated with eight pairs of chiral analytes including drugs and neurotransmitters,all achieving good resolution and symmetrical peak *** three consecutive runs,the relative standard deviations(RSD)of migration time for intra-day,inter-day,and column-tocolumn repeatability were in the range of 0.3%-3.5%,0.2%-4.9%and 2.1%-7.7%,***,the PTB film-coated capillary column ran continuously over 300 times with high separation ***,the coating method based on BSA self-assembly supramolecular film can be extended to the preparation of other proteinaceous capillary columns.

关键词： Open tubular capillary electrochromatography Proteinaceous phase-transitioned film Bovine serum albumin(BSA) Enantioseparation In-situ preparation

The status and development proposal of carbon sources and sinks monitoring satellite system

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碳中和(英文) 2022年第1期1卷 153-170页

作者： Guang Meng Yuan Wen Miaomiao Zhang Yilei Gu Wei Xiong Zijun Wang shengda Niu Shanghai Academy of Spaceflight Technology ShanghaiChina Shanghai Jiao Tong University ShanghaiChina Shanghai Institute of Satellite Engineering ShanghaiChina Anhui Institute of Optical Fine Mechanics HefeiChina

In order to mitigate global warming,the international communities actively explore low-carbon and green development *** to the Paris Agreement that came into effect in 2016,there will be a global stocktaking plan to carry out every 5 years from 2023 *** September 2020,China proposed a"double carbon"target of carbon peaking before 2030 and carbon neutrality before *** carbon peaking and carbon neutrality goals requires accurate carbon emissions and carbon ***’s existing carbon monitoring methods have insufficient detection accuracy,low spatial resolution,and narrow swath,which are difficult to meet the monitoring requirement of carbon sources and sinks *** order to meet the needs of carbon stocktaking and support the monitoring and supervision of carbon sources and sinks,it is recommended to make full use of the foundation of the existing satellites,improve the detection technical specifications of carbon sources and sinks monitoring measures,and build a multi-means and comprehensive,LEO-GEO orbit carbon monitoring satellite system to achieve higher precision,higher resolution and multi-dimensional carbon *** this basis,it is recommended to strengthen international cooperation,improve data sharing policy,actively participate in the development of carbon retrieval algorithm and the setting of international carbon monitoring standards,establish an independent and controllable global carbon monitoring and evaluation system,and contribute China’s strength to the global realization of carbon peaking and carbon neutrality.

关键词： Carbon sources and sinks Greenhouse gases Carbon monitoring system Carbon neutrality Carbon stocktaking

Construction of Redox Responsive Vesicles Based on a Supra-Amphiphile for Enzyme Confinement

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Chinese Journal of Chemistry 2017年第6期35卷 871-875页

作者： Tiezheng Pan Huixin Zou Hongcheng Sun Yao Liu shengda Liu Quan Luo Zeyuan Dong Jiayun Xu Junqiu Liu State Key Laboratory of Supramolecular Structure and Materials College of Chemistry Jilin University Changchun Jilin 130012 China

Redox responsive vesicles were constructed based on guest interaction between fl-cyclodextrin and a ferrocene self-assembly of a supra-amphiphile built by the host- derivative. The structure and destruction-reconstruction reversibility of the ＂smart＂ vesicles were clearly characterized by electron microscopy and dynamic light scattering. Notably, these vesicles were proved to be capable of controlled release function and bringing protease resistance to the enzyme, showing great biocompatibility and promising applications.

关键词： redox responsive host-guest systems vesicles supra-amphiphile glutathione S-transferase