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A novel structure of ultra-high-loading small moleculesencapsulated ZIF-8 colloid particles

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Nano Research 2024年第4期17卷 2929-2940页

作者： Pengfei Duan Yunhe An Xiaoxiao Wei yanjie Tian Di Guan Xiangwen liu Lanqun Mao Institute of Analysis and Testing Beijing Academy of Science and Technology(Beijing Center for Physical and Chemical Analysis)Beijing 100089China College of Chemistry Beijing Normal UniversityBeijing 100875China

The safety of nanoparticle-based drug delivery systems(DDSs)for cancer treatment is still a challenge,restricted by the intrinsic cytotoxicity of drug carriers and leakage of loaded drug.Here,we propose a novel nanocarrier’s cytotoxicity avoidance strategy by synthesizing an encapsulation core–shell structure of zeolitic imidazolate framework-8(ZIF-8)-based colloid particles(CPs)with an amorphous ZIF-8 skin.This encapsulation structure achieves an ultra-high loading rate(LR)of 90%(i.e.,9 mg doxorubicin(DOX)per 1 mg ZIF-8)for DOX and the protection of DOX from leaking.Notably,to deliver unit-dose drug,this ultra-high LR of 90%significantly reduces the usage of ZIF-8 to 1.2%(2 orders of magnitude)compared to that of DOX@ZIF-8 with a 10%LR,in which cytotoxicity of ZIF-8 could well below the safety limit and then be relatively ignored.Safety,drug delivery efficacy,scale-up ability,and universality of this encapsulation structure have been further verified.Our findings suggest the great potential of this ZIF-8-based encapsulation core–shell structure in the field of drug delivery.

关键词： metal-organic frameworks zeolitic imidazolate framework-8(ZIF-8) drug delivery nanoparticles nanostructures

Association between Meeting 24-Hour Movement Guidelines and Psychological Features of Chinese Emerging Adults

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International Journal of Mental Health Promotion 2024年第5期26卷 399-406页

作者： yanjie Zhang Jin Kuang Xun Luo Mengxian Zhao Xiaolei liu Physical Education Unit School of Humanities and Social ScienceChinese University of Hong Kong–ShenzhenShenzhen518172China Physical Activity and Health Promotion Laboratory Chinese University of Hong Kong–ShenzhenShenzhen518172China Body-Brain-Mind Laboratory School of PsychologyShenzhen UniversityShenzhen518060China School of Physical Education Shenzhen UniversityShenzhen518060China Chinese Traditional Regimen Exercise Intervention Research Center Beijing Sport UniversityBeijing100084China

Background:Emerging adulthood is a pivotal life stage,presenting significant psychological and social changes,such as decreased sociability,depression,and other mental health problems.Previous studies have associated these changes with an unhealthy lifestyle.The 24-h movement guidelines for healthy lifestyles have been developed to promote appropriate health behaviors and improve individual wellness.However,the relationship between adherence to the 24-h movement guidelines and different characteristics of Chinese emerging adults is yet to be explored.This cross-sectional study aimed to investigate the association between adherence to the 24-h movement guidelines and four characteristics(self-exploration,instability,possibilities,and responsibility)of Chinese emerging adults.Methods:Overall,1,510 Chinese emerging adults aged 18–29 years were included in this study.Each participant completed a self-administered questionnaire that included questions on adherence to the 24-h movement guidelines(physical activity,sedentary behavior,and sleep)and the inventory of dimensions of emerging adulthood.Multivariable logistic regression analysis was employed to investigate the associations between adherence to the 24-h movement guidelines and each of the four characteristics.Results:The proportion of participants who adhered to the 24-h movement guidelines was 31.72%.Multiple regression analysis revealed a significantly negative relationship between adhering to more guidelines and instability(β=−0.51,p<0.001).A statistically significant association was observed between instability and meeting only sedentary behavior(β=−1.27,95%confidence interval[CI]:[−2.32,−0.24],p=0.02),sedentary behavior+sleep(β=−1.30,95%CI:[−2.24,−0.35],p<0.01),and physical activity+sedentary behavior(β=−1.08,95%CI:[1.94,−0.21],p=0.02)guidelines.Further,positive and significant associations were observed between possibilities and meeting the guidelines for only physical activity(β=0.70,95%CI:[0.14,1.27),p=0.01),only sleep(β=0.61,95%CI:[0.01,1.21],p=0.04),p

关键词： 24-h movement behavior physical activity sedentary behavior sleep psychological health emerging adults

High-performance wood-based thermoelectric sponges for thermal energy harvesting and smart buildings

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Nano Research 2024年第6期17卷 5349-5357页

作者： Ding Zhang Qi Li yanjie Fang Peijia Bai Lili liu Jiaqi Guo Guangfa Wang Yuetong Zhou Rujun Ma School of Materials Science and Engineering National Institute for Advanced MaterialsSmart Sensing Interdisciplinary Science CenterNankai UniversityTianjin 300350China

The development of renewable woods for power generation can help improve the energy efficiency of buildings,and promote the concept design and implementation of“smart buildings”.Here,with specific chemical treatment and hydrothermal synthesis,we demonstrated the practical value of natural wood for thermoelectric power generation in smart buildings.The prepared wood-based thermoelectric sponges show high Seebeck coefficients of 320.5 and 436.6μV/K in the vertical and parallel directions of the longitudinal channel of wood.After 500 cycles of the compressive strain at 20%,the corresponding Seebeck coefficients increase up to 413.4 and 502.1μV/K,respectively,which is attributed to the improved contact and connection between tellurium thermoelectric nanowires.The Seebeck coefficients are much larger than those of most reported inorganic thermoelectric materials.Meanwhile,the thermoelectric sponges maintain excellent thermoelectric and mechanical stability.We further modeled the application value of wood-based thermoelectric sponges in smart buildings for power generation.Relatively high thermoelectric electricity can be obtained,such as in Beijing with over 1.5 million kWh every year,demonstrating the great potential in thermal energy harvest and energy supply.

关键词： wood thermoelectric effect thermal energy harvesting smart buildings energy supply

Multifunctional interfacial molecular bridge enabled by an aggregation-induced emission strategy for enhancing efficiency and UV stability of perovskite solar cells

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Journal of Energy Chemistry 2024年第8期95卷 588-595页

作者： Shuhang Bian Yuqi Wang Fancong Zeng Zhongqi liu Bin liu yanjie Wu Long Shao Yongzhi Shao Huan Zhang Shuainan liu Jin Liang Xue Bai Lin Xu Donglei Zhou Biao Dong Hongwei Song State Key Laboratory on Integrated Optoelectronics College of Electronic Science and Engineering Jilin University College of Science Shanghai University

The interface defects between the electron transport layer（ETL） and the perovskite layer,as well as the low ultraviolet（UV） light utilization rate of the perovskite absorption layer,pose significant challenges for the commercialization of perovskite solar cells（PSCs）.To address this issue,this paper proposes an innovative multifunctional interface modulation strategy by introducing aggregation-induced emission（AIE） molecule 5-[4-[1,2,2-tri[4-（3,5-dicarboxyphenyl）phenyl]ethylene] phenyl]benzene-1,3-dicarboxylic acid（H8ETTB） at the SnO2ETL/perovskite interface.Firstly,the interaction of H8ETTB with the SnO2surface,facilitated by its carboxyl groups,is effective in passivating surface defects caused by noncoord inated Sn and O vacancies.This interaction enhances the conductivity of the SnO2film and adjusts energy levels,leading to enhanced charge carrier transport.Simultaneously,H8ETTB can passivate noncoord inated Pb2+ions at the perovskite interface,promoting perovskite crystallization and reducing the interface energy barrier,resulting in a perovskite film with low defects and high crystalline quality.More importantly,the H8ETTB molecule,can convert UV light into light absorbable by the perovskite,thereby reducing damage caused by UV light and improving the device's utilization of UV.Consequently,the champion PSC based on SnO2-H8ETTB achieves an impressing efficiency of 23.32%and significantly improved photostability compared with the control device after continuous exposure to intense UV radiation.In addition,the Cs0.05(FA0.95MA0.05)0.95Pb(I0.95Br0.05)3based device can achieve maximum efficiency of 24.01%,demonstrating the effectiveness and universality of this strategy.Overall,this innovative interface bridging strategy effectively tackles interface defects and low UV light utilization in PSCs,presenting a promising approach for achieving highly efficient and stable PSCs.

关键词： Aggregation-induced emission Defect passivation Efficiency Perovskite solar cells UV stability

Effect of Zr and Ti on isothermal oxidation behavior of Nb–Si based alloys

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Progress in Natural Science:Materials International 2022年第2期32卷 226-235页

作者： Ankang Sun Ziqiang Dong Shuang Yang Jintao Shu yanjie liu Yi liu Yongwang Kang Dinggang Wang Jinxia Song Materials Genome Institute Shanghai University Science and Technology on Advanced High Temperature Structural Materials Laboratory Beijing Institute of Aeronautical Materials

The isothermal oxidation behavior of 56 Nb-16 Si-(20-x)Ti-3 Cr-3 Al-2 Hf-xZr(x=0,2,5,10 at.%) alloys was investigated at 800℃ and 1250℃,respectively.The results show that increasing the Zr content evidently increased the oxidation rates at 800℃,accompanied by the obvious occurrence of pesting oxidation.The alloys showed alike linear oxidation kinetics at 1250℃.With the increase of Zr content,the adherence and integrity of oxide scales were improved,but the overall oxidation resistance was slightly deteriorated.The observed oxidation behavior may be attributed to the composition variation of Zr and Ti in the alloys.The oxidation mechanism associated with the composition variation is discussed in this study.

关键词： Niobium Silicide Oxidation Zirconium Titanium

Multifunctional catalytic sites regulation of atomic-scale iridium on orthorhombic-CoSe_(2)for high efficiency dual-functional alkaline hydrogen evolution and organic degradation

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Journal of Energy Chemistry 2024年第5期92卷 271-281页

作者： Jingjing Huang Chenglin Zhong yanjie Xia Jia liu Guizhen Li Chao Yang Jiahong Wang Qian Wang Zhenbao Zhang Feng Yan Jianghua Wu Yu Deng Zhenjiang Zhou Xingchen He Paul K.Chu Woon-Ming Lau Xue-Feng Yu College of Chemistry and Chemical Engineering Linyi UniversityLinyi 276005ShandongChina Shenzhen Engineering Center for the Fabrication of Two-Dimensional Atomic Crystals Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055GuangdongChina National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093JiangsuChina College of Biosystems Engineering and Food Science Zhejiang UniversityHangzhou 310058ZhejiangChina Department of Physics Department of Materials Science and EngineeringDepartment of Biomedical EngineeringCity University of Hong KongTat Chee AvenueKowloonHong KongChina

The earth-abundant and high-performance catalysts are crucial for commercial implementation of hydrogen evolution reaction(HER).Herein,a multifunctional site strategy to construct excellent HER catalysts by incorporating iridium(Ir)ions on the atomic scale into orthorhombic-CoSe2(Ir-CoSe_(2))was reported.Outstanding hydrogen evolution activity in alkaline media such as a low overpotential of 48.7 mV at a current density of 10 mA cm^(-2)and better performance than commercial Pt/C catalysts at high current densities were found in the Ir-CoSe_(2) samples.In the experiments and theoretical calculations,it was revealed that Ir enabled CoSe_(2)to form multifunctional sites to synergistically catalyze alkaline HER by promoting the adsorption and dissociation of H_(2)O(Ir sites)and optimizing the binding energy for H^(*)on Co sites.It was noticeable that the electrolytic system comprising the Ir-CoSe_(2)electrode not only produced hydrogen efficiently via HER,but also degraded organic pollutants(Methylene blue).The cell voltage of the dual-function electrolytic system was 1.58 V at the benchmark current density of 50 mA cm^(-2),which was significantly lower than the conventional water splitting voltage.It was indicated that this method was a novel strategy for designing advanced HER electrocatalysts by constructing multifunctional catalytic sites for hydrogen production and organic degradation.

关键词： Orthorhombic-CoSe_(2) Multifunctional sites design Hydrogen evolution reaction Synergistically catalyze Methylene blue oxidation

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本地木本豆科植物比外来入侵木本豆科植物对极端干旱事件的负面响应更强

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Journal of Plant Ecology 2022年第3期15卷 485-493页

作者： Zhengkuan Lu Xue Zhang Hongxiang Zhang yanjie liu Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun 130102China College of Advanced Agricultural Sciences University of Chinese Academy of SciencesBeijing 100049China

植物入侵可能会受到极端干旱事件增加和大气氮沉降的影响。然而,极端干旱、氮沉降及其相互作用如何影响外来木本豆科植物的成功入侵尚不清楚。本研究选取3种入侵木本豆科植物和3种本地木本豆科植物,开展温室控制实验。分别将这些植物种... 详细信息

植物入侵可能会受到极端干旱事件增加和大气氮沉降的影响。然而,极端干旱、氮沉降及其相互作用如何影响外来木本豆科植物的成功入侵尚不清楚。本研究选取3种入侵木本豆科植物和3种本地木本豆科植物,开展温室控制实验。分别将这些植物种植在不同干旱处理(极端干旱和对照)和不同氮水平(低氮和高氮)下,然后对比分析两类植物的株高、叶片数、生物量以及根质量分数的差异。研究结果表明,极端干旱对本地木本豆科植物生长的抑制效应强于入侵木本豆科植物。尽管土壤氮素有效性的增加降低了植物的根质量分数,但这并不影响植物的整体表现。入侵木本豆科植物比本地木本豆科植物更能耐受长期极端干旱的负面效应。本研究加深了我们对气候变化导致的干旱事件如何影响外来木本豆科植物入侵的了解。

关键词：豆科全球变暖氮沉降植物入侵水分有效性

Improved thermal conductivity of epoxy resin by graphene-nickel three-dimensional filler

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Carbon Resources Conversion 2020年第1期3卷 29-35页

作者： yanjie liu Jiangyin Lu Yanbin Cui State Key Laboratory of Multiphase Complex System Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Zhengzhou Institute of Emerging Industrial Technology ZhengzhouHenan 450000China Key Laboratory of Oil&Gas Fine Chemicals Ministry of EducationCollege of Chemistry and Chemical EngineeringXinjiang UniversityUrumqi 830046China Dalian National Laboratory for Clean Energy Dalian 116023China

Owing to high thermal conductivity,carbon nanotube and graphene have been used as nanofillers to improve the thermal conductivity of polymer.However,the agglomeration of nanofillers in polymer inhibits their applications in improving the thermal conductivity of composite.To overcome this problem,graphene was grown on Ni foam by chemical vapor deposition in this work.And graphene-nickel three-dimensional filler was added into epoxy resin to improve the thermal conductivity of epoxy resin.Ni foam can prevent the agglomeration of graphene in epoxy resin and a thermally conductive network by graphene and Ni foam was formed in epoxy resin.By adding graphene-nickel three-dimensional filler into epoxy resin,the thermal conductivity of graphene-nickel/epoxy composite can reach up to 2.6549 W⋅m^(-1)⋅k^(-1),which was 9 times higher than that of raw epoxy resin.

关键词： Epoxy resin Graphene Ni foam Thermal conductivity Composite

基于交错网格有限差分算法的页岩声波各向异性校正方法研究

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地球物理学报 2024年第4期67卷 1570-1582页

作者：张兆谦闫伟林宋延杰刘鹤殷树军东北石油大学地球科学学院大庆163318 大庆油田有限责任公司勘探开发研究院大庆163712 多资源协同陆相页岩油绿色开采全国重点实验室大庆163712 卡尔加里大学地球科学系卡尔加里2500

页岩具有层理发育的特征,这会引起强烈的声波各向异性,导致直井与水平井声波测井数据之间差异明显,因此在水平井储层参数计算中无法直接应用基于直井的岩石物理解释模型.为了解决这一问题,本文以页岩波速各向异性实验数据为基础,引入交... 详细信息

页岩具有层理发育的特征,这会引起强烈的声波各向异性,导致直井与水平井声波测井数据之间差异明显,因此在水平井储层参数计算中无法直接应用基于直井的岩石物理解释模型.为了解决这一问题,本文以页岩波速各向异性实验数据为基础,引入交错网格有限差分算法,首先在直井井孔模型中(VTI介质)模拟了声波的发射和接收,随后通过弹性系数矩阵的Bond变换,模拟了在井斜角不为0的情况下(TTI介质)井孔中的声场传播,以任意井斜角与井斜角为0情况下纵波慢度差值相对值为纵坐标,以相对应的井斜角为横坐标,建立起了纵波各向异性校正公式.模拟与应用结果表明:井孔中波形曲线与实轴积分法(RAI)得到的波形曲线一致,同时利用慢度相似相关算法(STC)得到的地层纵波慢度与给定的实验测量值吻合很好,在28种地层弹性参数的情况下,平均相对误差为2.3%;纵波慢度差值相对值与井斜角关系曲线显示,在井斜角小于30°的条件下,纵波慢度差值相对值变化较小,随着井斜角大于30°后,相对值变化增大,当井斜角为90°也就是水平井模式下,纵波慢度差值相对值达到最大.根据纵波各向异性校正公式,对水平井纵波曲线进行了慢度校正.利用纵波校正前后计算的水平井有效孔隙度与导眼井岩心分析有效孔隙度相对误差分析表明,纵波校正后计算的有效孔隙度计算精度有了明显的提高,证明了该方法具有非常好的应用效果,可用于页岩水平井纵波慢度校正.

关键词：交错网格有限差分声波各向异性页岩水平井

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