检索结果-南通市图书馆

Close-loop recyclable and flexible halide perovskite@wool keratin sensor with piezoelectric property

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第9期84卷 428-435页

作者： Yingying Zhou Dangge Gao Bin Lyu Chi Zheng Litao Tang Shihao Guo jianzhong ma College of Bioresources Chemical and materials Engineering Shaanxi University of Science and TechnologyXi'an 710021ShaanxiChina Xi'an Polytechnic University Xi'an 710048ShaanxiChina National Demonstration Center for Experimental Light Chemistry Engineering Education(Shaanxi University of Science&Technology) Xi'an 710021ShaanxiChina Xi'an Key Laboratory of Green Chemicals and Functional materials Xi'an 710021ShaanxiChina

Halide perovskites with excellent piezoelectric properties,but their poor stability hinders their largescale application.Herein,a sandwich-structured halide perovskite flexible sensor with good stability was developed according to a three-step procedure as follows:(ⅰ) in-situ growth of wool keratinCsPbBr_(3)(WK-CsPbBr_(3)) using wool keratin in interfacial passivation and coating,(ⅱ) electrospinning of a wool keratin-CsPbBr_(3)/polyacrylonitrile(WCP) nanofiber film,and(ⅲ) coating of the WCP nanofiber with polydimethylsiloxane(PDMS) to obtain a sensor(WCPP).The sensor could generate a piezoelectric voltage of 7.8 V at a pressure of 6 kPa in the stages of pressing and releasing,and the output characteristics did not decline even after 10,000 cycles.Compared to the 4-month stability of the perovskite sensor,WCPP sensor exhibited the output performance even after 16 months,which indicated that wool keratin as a multidentate improved the stability of the halide perovskite.Additionally,the sensor displayed a self-cleaning property and could also light up 14 commercial LEDs.The close-loop recycling of the lead halide perovskite was achieved by dissolving the WCP nanofiber film in DMF and then reelectrospinning.Therefore,the method proposed is a step forward for achieving the commercialization of WK-CsPbBr_(3) and providing new avenues for further utilization of wool waste.

关键词： Piezoelectric Halide perovskite Wool keratin Sensor Human monitoring

聚合物基MXene光热复合材料的应用研究进展

在线全文

学校读者我要写书评

暂无评论

精细化工 2024年第4期41卷 728-739页

作者：马莉马建中张雷陕西科技大学化学与化工学院陕西西安710021 陕西科技大学轻工科学与工程学院陕西西安710021 西安市绿色化学品与功能材料重点实验室陕西西安710021 陕西科技大学轻化工程国家级实验教学示范中心陕西西安710021

过渡金属碳/氮化物(MXene)是一种新兴的二维纳米材料,具有组成可调、结构可控和优异的光热转换性能。MXene可吸收太阳光,并将其高效转换为热能,为太阳能的有效利用提供了新途径。将MXene加入聚合物基体中,不仅可赋予聚合物基复合材料优... 详细信息

过渡金属碳/氮化物(MXene)是一种新兴的二维纳米材料,具有组成可调、结构可控和优异的光热转换性能。MXene可吸收太阳光,并将其高效转换为热能,为太阳能的有效利用提供了新途径。将MXene加入聚合物基体中,不仅可赋予聚合物基复合材料优异的光热性能,而且可提升MXene的稳定性。该文总结了MXene及聚合物基MXene光热复合材料的制备方法,介绍了聚合物基MXene光热复合材料的光热转换机理,综述了聚合物基MXene光热复合材料在海水淡化、个人热管理、光热抗菌和光热治疗方面的应用研究进展;针对聚合物基MXene光热复合材料在实际应用中所面临的MXene难以绿色安全生产、易氧化和在聚合物基体中分散性差等挑战,对其未来的发展方向进行了展望。

关键词： MXene 聚合物基光热复合材料光热转换机理应用研究前景展望

维普期刊数据库博看期刊

Hepatic venous pressure gradient measurement guiding nonselective beta-blocker therapy in a patient with clinically significant portal hypertension

在线全文

学校读者我要写书评

暂无评论

Portal Hypertension & Cirrhosis 2023年第2期2卷 105-108页

作者： Kun Wang Minghui Tian Linpeng Zhang Shanghao Liu Xiaoqing Guo jianzhong ma Department of Hepatology Taiyuan Third People's HospitalTaiyuanShanxiChina Department of Interventional Taiyuan Third People's HospitalTaiyuanShanxiChina The First Clinical Medical College of Lanzhou University LanzhouGansuChina

Clinically significant portal hypertension(CSPH),defined as a hepatic venous pressure gradient(HVPG)≥10 mmHg,is an independent risk factor for decompensated events in patients with compensated cirrhosis.Currently,the Baveno VII consensus recommends using nonselective beta-blockers to treat compensated cirrhosis in patients with CSPH.Here,we report a unusual case of compensated cirrhosis with CSPH caused by hepatitis B,and we successfully adjust NSBBs drug treatment strategies monitoring by HVPG results and achieve response standards.Timely adjustment of NSBBs drug treatment strategies based on HVPG test results for patients with CSPH can improve the final response rate.

关键词： Hepatic venous pressure gradient Non‐selective beta‐blocker Portal hypertension

Seasonal variation in surface ozone and its regional characteristics at global atmosphere watch stations in China

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2019年第3期31卷 291-302页

作者： Ningwei Liu Weili Lin jianzhong ma Wanyun Xu Xiaobin Xu Nanjing University of Information Science & Technology State Key Laboratory of Severe Weather & Cma Key Laboratory for Atmospheric Chemistry Chinese Academy of Meteorological Sciences Shenyang Institute of Atmospheric Environment China Meteorological Administration College of Life & Environmental Science Minzu University of China

We investigated the seasonal and spatial ozone variations in China by using three-year surface ozone observation data from the six Chinese Global Atmosphere Watch(GAW)stations and tropospheric column ozone data from satellite retrieval over the period2010–2012. It is shown that the seasonal ozone variations at these GAW stations are rather different, particularly between the western and eastern locations. Compared with western China, eastern China has lower background ozone levels. However, the Asian summer monsoon(ASM) can transport photochemical pollutants from the southern to the northern areas in eastern China, leading to a northward gradual enhancement of background ozone levels at the eastern GAW stations. Over China, the tropospheric column ozone densities peak during spring and summer in the areas that are directly and/or indirectly affected by the ASM, and the peak time lags from the south to the north in eastern China. We also investigated the regional representativeness of seasonal variations of ozone at the six Chinese GAW stations using the yearly maximum tropospheric column month as indicator.The results show that the seasonal variation characteristics of ozone revealed by the Chinese GAW stations are typical, with each station having a considerable large surrounding area with the ozone maximum occurring at the same month. Ozone variations at the GAW stations are influenced by many complex factors and their regional representativeness needs to be investigated further in a broader sense.

关键词： Surface ozone Tropospheric ozone column GAW stations Seasonal variations Regional representativeness

Atmospheric extinction properties in Shenyang,China

在线全文

学校读者我要写书评

暂无评论

Particuology 2015年第1期13卷 120-126页

作者： Ningwei Liu Yanjun ma jianzhong ma Yangfeng Wang Suying Yang Liguang Li Chinese Academy of Meteorological Sciences Nanjing University of Information Science & Technology Institute of Atmospheric Environment China Meteorological Administration

Atmospheric visibility impairment due to human activities is becoming increasingly significant in metropolitan 8henyang, China. In this study, hourly data of relevant factors throughout the year 2010 in Shenyang were used to evaluate the local atmospheric extinction properties. The results show that the average coefficient of total extinction and aerosol single-scattering albedo in 2010 were 622.72 Mm^-1 and 0.87, respectively, values that are characteristic of the ＂municipal pollution type＂. Visibility is most impaired during winter and especially in January. The coefficient of total extinction exhibits a single daily cycle with a maximum at 5-6 am and a minimum at 3 pm. The mean extinction contributions of the constituents, from high to low, were particle scattering （87.49%）, particle absorption, gas absorption, and gas scattering. The extinction contribution of gas molecules was little more than 4.5%, far smaller than that of particles. Scattering by particles was the main contributor to extinction, especially in the morning and around midnight.

关键词： Atmospheric visibility Extinction properties Extinction contributions Partide scattering

Tropospheric NO_2 vertical column densities retrieved from ground-based maX-DOAS measurements at Shangdianzi regional atmospheric background station in China

在线全文

学校读者我要写书评

暂无评论

环境科学学报：英文版 2019年第6期31卷 186-196页

作者： Siyang Cheng jianzhong ma Weiping Cheng Peng Yan Huaigang Zhou Liyan Zhou Peng Yang State Key Laboratory of Severe Weather & Cma Key Laboratory of Atmospheric Chemistry Chinese Academy of Meteorological Sciences China Waterborne Transport Research Institute Cma Meteorological Observation Centre Shangdianzi Regional Air Background Station Beijing Meteorological Bureau Meteorological Bureau of Shijiazhuang

Ground-basedMulti-AXis Differential Optical Absorption Spectroscopy(maX-DOAS)measurements were performed at Shangdianzi(SDZ)regional atmospheric background station in northern China from march 2009 to February 2011.The tropospheric NO_2vertical column densities(VCDs)were retrieved to investigate the background condition of the Beijing–Tianjin–Hebei developed economic circle in China.The seasonal variation of mean NO_2tropospheric VCDs(VCD_(Trop))at SDZ is apparent,with the maximum(1.3×10^(16)molec/cm^2)in February and the minimum(3.5×10^(15)molec/cm^2)in August,much lower than those observed at the Beijing city center.The average daytime diurnal variations of NO_2VCD_(Trop )are rather consistent for all four seasons,presenting the minimum at noon and the higher values in the morning and evening.The largest and lowest amplitudes of NO_2VCD_(Trop)diurnal variation appear in winter and in summer,respectively.The diurnal pattern at SDZ station is similar to those at other less polluted stations,but distinct from the ones at the urban or polluted stations.Tropospheric NO_2VCDs at SDZ are strongly dependent on the wind,with the higher values being associated with the pollution plumes from Beijing city.Tropospheric NO_2VCDs derived from ground-based maX-DOAS at SDZ show to be well correlated with corresponding OMI(Ozone Monitoring Instrument)satellite products with a correlation coefficient R=0.88.However,the OMI observations are on average higher than maX-DOAS NO_2VCDs by a factor of 28%,probably due to the OMI grid cell partly covering the south of SDZ which is influenced more by the pollution plumes from the urban areas.

关键词： Ground-basedmaX-DOAS Tropospheric NO2 Satellite validation Pollution plume Regional atmospheric background station

Cretaceous integrative stratigraphy,biotas,and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2024年第4期67卷 1229-1289页

作者： Dangpeng XI Guobiao LI Shijun JIANG Xin RAO Tian JIANG Tianyang WANG Zuohuan QIN Yasu WANG jianzhong JIA Muhammad KAMRAN Zhongye SHI Yuyang WU Panxi WANG Lixin SUN Qinggao ZENG Xiaoqiao WAN State Key Laboratory of Biogeology and Environmental Geology China University of GeosciencesBeijing 100083China College of Oceanography Hohai UniversityNanjing 213200China Key Laboratory of Palaeobiology and Petroleum Stratigraphy Nanjing Institute of Geology and PaleontologyChinese Academy of SciencesNanjing 210008China State Key Laboratory of Tibetan Plateau Earth System Environmentand Resources(TPESER)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China China National Offshore Oil Corporation Limited Beijing 100028China Shanghai Science and Technology Museum Shanghai 200120China Xizang Bureau of Geological and Mineral Exploration and Development Lhasa 850000China Tianjin Geological Survey Center of China Geological Survey Tianjin 300170China

The Cretaceous Period is a vital time interval in deciphering the evolutionary history of the Neo-Tethys Ocean and the convergence of different plates and blocks across the Qinghai-Tibetan Plateau.A detailed stratigraphic framework and paleogeographic patterns are the basis for understanding the evolution of the Neo-Tethys Ocean and the formation of the QinghaiTibetan Plateau.Here,the Cretaceous stratigraphy,biota,paleogeography,and major geological events in the Qinghai-Tibetan Plateau are analyzed to establish an integrative stratigraphic framework,reconstruct the paleogeography during the Cretaceous Period,and decode the history of the major geological events.The Cretaceous rocks of the Qinghai-Tibetan Plateau and its surrounding area are predominantly marine deposits,with a small amount of interbedded marine-terrestrial and terrestrial conponents.The Indus-Yarlung Tsangpo Suture Zone was responsible for the deposition of deep marine sediments dominated by ophiolite suites and radiolarian silicalite.To the south,the Tethys Himalayas and Indus Basin received marine sediments of varying depths and lithology;to the north,the Xigaze and Ladakh forearc basins are also filled with marine sediments.The Lhasa Block,Karakorum Block,western Tarim Basin,and West Burma block consist of shallow marine,interbedded marine-terrestrial,and terrestrial sediments.The Qiangtang Basin and other areas are dominated by terrestrial sedimentation.The Cretaceous strata of the Qinghai-Tibetan Plateau and its surrounding areas are widely distributed and diversified,with abundant foraminifera,calcareous nannofossils,radiolarians,ammonites,bivalves,and palynomorphs.On the basis of integrated lithostratigraphic,biostratigraphic,geochronologic,and chemostratigraphic analyses,we proposed herein a comprehensive stratigraphic framework for the Cretaceous Period of the eastern Neo-Tethys.By analyzing the Cretaceous biota of different biogeographic zones from eastern Neo-Tethys and its surrounding areas,we reconstructed the paleobiogeography of d

关键词： Qinghai-Tibetan Plateau Tethys Cretaceous Stratigraphy Biota Paleogeography

在线全文

学校读者我要写书评

暂无评论

不锈钢纤维多孔材料及其复合结构的隔声性能

稀有金属材料与工程 2024年第5期53卷 1444-1448页

作者：敖庆波王建忠马军吴琛西北有色金属研究院金属多孔材料国家重点实验室陕西西安710016

本研究以8μm不锈钢纤维毛毡为原料,利用体积称重法和高温烧结工艺制备出具有不同孔隙率、平均孔径和厚度的不锈钢纤维多孔材料。通过结构优化设计了正梯度结构、反梯度结构和薄膜复合结构,对3种结构进行了隔声性能的测试,分别研究了3... 详细信息

本研究以8μm不锈钢纤维毛毡为原料,利用体积称重法和高温烧结工艺制备出具有不同孔隙率、平均孔径和厚度的不锈钢纤维多孔材料。通过结构优化设计了正梯度结构、反梯度结构和薄膜复合结构,对3种结构进行了隔声性能的测试,分别研究了3种结构的隔声特性。隔声结果表明,不锈钢纤维多孔材料具有一定的隔声性能,厚度为20 mm,孔隙率为85%,在50~6400 Hz频率范围内,不锈钢纤维多孔材料的平均隔声量为18.91 dB;其孔隙率越低,平均孔径越小,厚度越厚,材料的隔声性能越好;设计的正梯度和反梯度结构的隔声性能比单层不锈钢纤维多孔材料的隔声性能差;添加金属薄膜的不锈钢纤维多孔复合材料在中高频处的隔声性能有很大提高,厚度为20mm,平均隔声量达27.86 dB,最高处提高16.96 dB。

关键词：金属纤维多孔材料隔声性能薄膜材料结构优化

在线全文

学校读者我要写书评

暂无评论

抗菌型纳米材料在制革加工过程中的应用

精细化工 2024年第3期41卷 534-541,557页

作者：范倩倩胡雪云石传晋马建中陕西科技大学轻工科学与工程学院陕西西安710021 西安市绿色化学品与功能材料重点实验室陕西西安710021 中国皮革和制鞋工业研究院(晋江)有限公司福建泉州362200 轻化工程国家级实验教学示范中心陕西西安710021

皮革作为一种天然材料,在贮存过程中容易滋生细菌或发霉,对人体健康造成一定的影响。近年来,抗菌型纳米材料具有耐热性好、稳定性高、比表面积大和反应活性高等特性,已在制革加工领域得到了广泛应用。首先,归纳了抗菌型纳米材料的种类... 详细信息

皮革作为一种天然材料,在贮存过程中容易滋生细菌或发霉,对人体健康造成一定的影响。近年来,抗菌型纳米材料具有耐热性好、稳定性高、比表面积大和反应活性高等特性,已在制革加工领域得到了广泛应用。首先,归纳了抗菌型纳米材料的种类、特点和制备方法;接着,阐述了抗菌型纳米材料的抗菌机制;然后,对其作为鞣剂及其助剂、加脂剂、涂饰材料在制革工业中的应用进行了详细的介绍;最后,对现阶段抗菌型纳米材料在制革加工过程中应用存在的问题及今后的研究方向进行了分析和展望,为推进皮革行业的新材料推广及应用提供理论及实践指导。

关键词：抗菌型纳米材料制革工业加脂剂鞣剂涂饰材料