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MOF synthesis using waste PET for applications of adsorption, catalysis and energy storage

GREEN ENERGY & ENVIRONMENT 2024年第11期9卷 1650-1665页

作者： li, Hongmei Lei, Jinming Zhu, liying Yao, Yanling li, yuanhua li, Tianhao Qiu, Chuntian Chengdu Univ Coll Food & Bioengn Chengdu 610106 Peoples R China Zhejiang Univ ZJU Hangzhou Global Sci & Technol Innovat Ctr Hangzhou 311215 Peoples R China Huizhou Univ Sch Chem & Mat Engn Huizhou 516007 Peoples R China Southwest Univ Sch Mat & Energy Chongqing Key Lab Adv Mat & Technol Clean Energy Chongqing 400715 Peoples R China Southwest Univ Yibin Acad Univ Rd Yibin 644005 Sichuan Peoples R China

Polyethylene terephthalate (PET) as one of non-degradable wastes has become a huge threat to the environment and human health. Chemical Recycle of PET is a sustainable way to release 1,4-benzenedicarboxylic acid (BDC) the monomer of PET as common used organic linker for synthesis of functional Metal-organic-frameworks (PET-derived MOFs) such as UiO-66, MIL-101, etc. This sustainable and costeffective "Waste-to-MOFs" model is of great significant to be intensively investigated in the past years. Attributes of substantial porosity, specific surface area, exposed metal centers, uniform structure, and flexible morphology render PET-derived MOFs are well-suited for applications in adsorption, energy storage, catalysis, among others. Herein, in the present work, we have summarized recent advances in synthesis of PETderived MOFs using ex-situ and in-situ methods for typical applications of adsorption, catalysis and energy storage. Despite those improvements in synthesis methods and potential applications, challenges still remain in development of green and economical routes to fully utilize waste PET for massive manufacture of valuable MOF materials and chemicals. This review provides insights into the conversion of non-degradable PET waste to value-added MOF materials, and further suggests promising perspectives to develop the sustainable "Waste-to-MOFs" model in (c) 2024 Institute of Process Engineering, Chinese Academy of Sciences. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NC-ND license (http://***/licenses/by-nc-nd/4.0/).

关键词： Plastic waste Polyethylene terephthalate Chemical recycle 4-benzenedicarboxylic acid Metal organic frameworks METAL-ORGANIC FRAMEWORKS POLYETHYLENE TEREPHTHALATE WASTES BOTTLES DEPOLYMERIZATION STRATEGIES REDUCTION

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档案专门性问题解决程式的逻辑展开与路径探析

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档案学通讯 2024年第2期 13-22页

作者：李元华东南大学法学院南京211189

当前,档案事业发展中存在诸多需要专业知识介入才能解决的专门性问题。然而,集专业性、交叉性和普遍性为一体的档案专门性问题并未引起人们足够的重视,其在本质上仍然是一个正在进行但却被严重忽视的问题。有鉴于此,实有必要将档案专门... 详细信息

当前,档案事业发展中存在诸多需要专业知识介入才能解决的专门性问题。然而,集专业性、交叉性和普遍性为一体的档案专门性问题并未引起人们足够的重视,其在本质上仍然是一个正在进行但却被严重忽视的问题。有鉴于此,实有必要将档案专门性问题从纷乱庞杂的常识体系中抽象出来,进而建立起科学完备的档案专门性问题解决程式。具体而言,可尝试分别从规范、实践和工具三个维度入手,在效力级别较高的法律规范中实现对档案专门性问题的规范续造;在档案管理、档案执法和档案司法中优化现有的专家介入机制;针对档案专门性问题解决程式的启动、运行和审查等环节对治理资源进行精准配置等,最终力求使专门性知识能够更好地服务于档案事业的长远发展。

关键词：档案治理专门性问题技术逻辑专家介入

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青海地区家庭内成员幽门螺杆菌感染情况及危险因素分析

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中华内科杂志 2024年第1期63卷 41-45页

作者：李春霞王学红马臻棋绽永华沈利娟王芳李源化青海大学临床医学院西宁810016 青海大学附属医院消化内科西宁810012

目的了解青海地区家庭内成员幽门螺杆菌(***)感染情况并分析其危险因素。方法横断面研究。将青海地区按照城区、农业区、牧业区分层,选择西宁市城区、海东市农业区、海北藏族自治州牧区。对以上地区2021年至2022年进行健康体检的396个... 详细信息

目的了解青海地区家庭内成员幽门螺杆菌(***)感染情况并分析其危险因素。方法横断面研究。将青海地区按照城区、农业区、牧业区分层,选择西宁市城区、海东市农业区、海北藏族自治州牧区。对以上地区2021年至2022年进行健康体检的396个居民家庭(1131人)纳入调查研究。对其进行问卷调查,并采用13C-尿素呼气试验检测***感染情况。计数资料以例数和百分数表示,采用卡方检验比较各组人群及家庭***感染率的差异。***感染的危险因素分析采用多因素logistic回归。P<0.05为差异有统计学意义。结果青海地区***感染率为52.8%(597/1131),家庭内***感染率为80.6%(319/396)。对***阳性家庭的夫妻感染情况分析显示,夫妻一方感染家庭占40.4%(36/89),夫妻双方均感染家庭占59.6%(53/89)。父母感染***时子女感染情况分析显示,父子均感染家庭占20.0%(9/45),母子均感染家庭占48.9%(22/45),父母子均感染家庭占31.1%(14/45)。单因素分析结果显示,家庭共同生活人数不同,家庭***感染率总体比较差异有统计学意义(χ^(2)=11.12,P=0.004),组间比较提示共同生活人数为4~5人及5人以上的家庭***感染率高于共同生活人数为2~3人的家庭。家庭聚餐时不使用公筷、公勺的家庭***感染率高于使用公筷、公勺的家庭(χ^(2)=6.12,P=0.013)。多因素logistic回归分析结果显示,家庭共同生活人数及家庭聚餐时是否使用公筷、公勺与***感染相关(P<0.05)。结论青海地区家庭内***感染率较高,存在明显的家庭聚集现象。其中夫妻同时感染情况比较普遍,且母亲感染***时对子女感染的影响较大。聚餐时使用公筷、公勺的家庭***感染率较低,家庭共同生活人数越少,***感染率越低。

关键词：螺杆菌幽门家庭卫生流行病学

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圆柱肋片直径对流动沸腾影响的数值研究

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低温与超导 2024年第5期52卷 72-80页

作者：呼和仓陈占秀李源华苏瑶邢赫威河北工业大学能源与环境工程学院天津300401

微通道散热器(MCHS)广泛应用于微电子系统。本文提出了三种圆柱肋片直径不同梯度减小微通道,采用数值模拟的方法,在热通量100~500 W/cm2时研究了不同微通道流动沸腾换热特性。研究得出,圆柱肋片中梯度减小时通道截面温度最低,强化换热... 详细信息

微通道散热器(MCHS)广泛应用于微电子系统。本文提出了三种圆柱肋片直径不同梯度减小微通道,采用数值模拟的方法,在热通量100~500 W/cm2时研究了不同微通道流动沸腾换热特性。研究得出,圆柱肋片中梯度减小时通道截面温度最低,强化换热效果最好。随着热通量增加,沸腾起始点向上游移动,底壁生成气泡速率越大,对流传热系数越大,压降也越大;综合传热系数和压降对比得出,GF综合强化换热效果最好,依次为BF、SF、UF,RF。

关键词：圆柱肋片沸腾传热换热性能肋片梯度排列

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A 15-user quantum secure direct communication network

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light(Science & Applications) 2021年第12期10卷 2322-2329页

作者： Zhantong Qi yuanhua li Yiwen Huang Juan Feng Yuanlin Zheng Xianfeng Chen State Key Laboratory of Advanced Optical Communication Systems and Networks School of Physics and AstronomyShanghai Jiao Tong University200240 ShanghaiChina Department of Physics Jiangxi Normal University330022 NanchangChina Shanghai Research Center for Quantum Sciences 201315 ShanghaiChina Collaborative Innovation Center of light Manipulation and Applications Shandong Normal University250358 JinanChina

Quantum secure direct communication(QSDC)based on entanglement can directly transmit confidential ***,the inability to simultaneously distinguish the four sets of encoded entangled states limits its practical ***,we explore a QSDC network based on time–energy entanglement and sum-frequency *** total,15 users are in a fully connected QSDC network,and the fidelity of the entangled state shared by any two users is>97%.The results show that when any two users are performing QSDC over 40 km of optical fiber,the fidelity of the entangled state shared by them is still>95%,and the rate of information transmission can be maintained above 1 Kbp/*** result demonstrates the feasibility of a proposed QSDC network and hence lays the foundation for the realization of satellite-based long-distance and global QSDC in the future.

关键词： quantum hence realization

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武夷山地方茶树种质生化特性和茶多糖清除超氧阴离子自由基活性分析

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中国农业科技导报 2024年第5期26卷 65-76页

作者：石玉涛谢惠珍郑淑琳羽观华王飞权李力张渤李远华罗盛财武夷学院茶与食品学院茶叶福建省高校工程研究中心茶叶科学研究所福建武夷山354300 武夷山龟岩茶业有限公司福建武夷山354300

为探明武夷山地方茶树种质主要生化成分特性和茶多糖清除超氧阴离子自由基活性差异,测定了31份武夷山地方茶树种质主要生化成分含量,采用水提醇沉淀法提取茶多糖,并采用黄嘌呤氧化酶法比较了茶多糖SOD活力。结果表明,武夷山地方茶树种... 详细信息

为探明武夷山地方茶树种质主要生化成分特性和茶多糖清除超氧阴离子自由基活性差异,测定了31份武夷山地方茶树种质主要生化成分含量,采用水提醇沉淀法提取茶多糖,并采用黄嘌呤氧化酶法比较了茶多糖SOD活力。结果表明,武夷山地方茶树种质主要生化成分存在较强的变异和遗传多样性,具有较大的遗传改良潜力。平均变异系数为21.84%,平均遗传多样性指数为2.08,平均改良潜力为50.92%;茶多酚、游离氨基酸、黄酮类化合物、可溶性糖含量和酚氨比均呈正态分布;茶多酚含量与黄酮类化合物含量呈极显著正相关,与可溶性糖含量呈极显著负相关,游离氨基酸含量与可溶性糖含量呈极显著负相关;提取的前2个主成分包含了5个生化指标81.08%的信息,游离氨基酸和茶多酚含量是5个生化性状的特征指标,主成分综合得分排名前5位的茶树种质为‘白牡丹’‘红海棠’‘向天梅’‘半天妖’和‘香石角’,可作为武夷山茶区优质乌龙茶品种选育和推广栽培的良好材料;基于生化成分的聚类分析将31份茶树种质分为3类,第Ⅰ类群13份种质茶多酚和黄酮类化合物含量高,可溶性糖含量低,第Ⅱ类群8份种质游离氨基酸含量较低,可溶性糖含量较高,第Ⅲ类群10份种质酚氨比较高,可溶性糖含量中等;基于茶多糖SOD活力的聚类分析,可将31份茶树种质分为3类,第Ⅰ类群8份种质茶多糖SOD活力低,第Ⅱ类群19份种质茶多糖SOD活力居中,第Ⅲ类群4份种质茶多糖SOD活力高;茶多糖SOD活力存在丰富的变异,变异系数达40.62%,遗传多样性指数为2.07;‘白鸡冠’‘大红袍’‘大红梅’和‘灵芽’4份种质茶多糖SOD活力高,清除超氧阴离子自由基能力强。研究结果可为武夷山地方茶树种质的改良和开发利用提供科学依据。

关键词：武夷山茶树种质生化成分茶多糖超氧阴离子自由基主成分分析聚类分析

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Spatial variability of irrigation factors and their relationships with “corridor-barrier” functions in the Longitudinal Range-Gorge Region

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Chinese Science Bulletin 2007年第A02期52卷 33-41页

作者： GU ShiXiang HE DaMing CUI YuanLai XIE XianHong li yuanhua State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University Wuhan 430072 China Yunnan Institute for Investigation Design and Research of Water Resources & Hydropower Engineering Kunming 650021 China Asian International Rivers Center Yunnan University Kunming 650091 China Department of Irrigation Drainage and Rural Water Supply Ministry of Water Resources P. R. China Beijing 100053 China

在纵的范围峡区域( LRGR )和包围区域从 1971～2000 在 58 个气象学的车站基于每月气象学的数据，包括每年的 et 0 的六个因素，最大的每月的 et 0 (5月)，最小的每月的 et 0 (12月)，稻灌溉限额和全部的农业灌溉限额(到6月的从4月... 详细信息

在纵的范围峡区域( LRGR )和包围区域从 1971～2000 在 58 个气象学的车站基于每月气象学的数据，包括每年的 et 0 的六个因素，最大的每月的 et 0 (5月)，最小的每月的 et 0 (12月)，稻灌溉限额和全部的农业灌溉限额(到6月的从4月的每年、主要的灌溉时期)被选择用一条 geostatistical 途径检验他们的空间可变性。结果显示 Morans 的系数我，描述空间自相关的紧张，比在另外的方向在纵的方向是更大的；六个参数的空间可变性被结构的因素财务主要为 60.2%87.9% 引起；et 0 的最大的可变性(每年，在 5 月和 12 月) 出现在西北东南和东北西南方向。由于夏天季风从印度洋和太平洋的大气的环流，和大陆人在冬季，最小的分数维的尺寸和 et 0 的最大的空间可变性的温暖干燥的电流(每年，在 5 月和 12 月) 发生在西南东北和东南西北方向。稻和全部的农业灌溉要求的最高的可变性由于纵的河的走廊功能引起的蒸汽和精力散开发生在南方北方方向。最小的空间自相关在东方西方方向，它证明农业灌溉要求的六个参数被走廊障碍功能在 LRGR 和它的包围区域影响。

关键词：空间可变性灌溉影响因素纵向岭谷区

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Influence of ＂corridor- barrier＂ function on water demand of paddy irrigation in the Longitudinal Range-Gorge Region

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Chinese Science Bulletin 2006年第B11期51卷 9-15页

作者： GU Shixiang HE Daming li yuanhua FU Hua School of Water Resources and Hydropower Wuhan University Wuhan 430072 China Yunnan Institute of Water Resources and Hydropower Engineering Investigation Design and Research Kunming 650021 China Asian International Rivers Center Yunnan University Kunming 650091 China National Center of Irrigation and Drainage Development Beijing 100053 China Yunnan Provincial Water Resources Bureau Kunming 650021 China

Based on the daily data at the four weather stations of Baoshan, Jinghong, Yuanjiang in the longitudinal range-gorge region, and Kunming nearby from 1970 to 2000, the daily evapotranspiration (ET0) changes at the four stations were analyzed. It was found that: (1) the daily ET0 shows the "delay phenomenon", it means that the daily ET0 change goes up to the maximum point in May and then starts to go down with a wave-like "delay phenomenon" at 80%-85% of ET0max value till Autumn, and the change trend significantly differs from that of other regions in China. Affected by the meteorological factors, the maximum values of paddy water demand and irrigation water consumption do not appear with the peak of paddy growth at the same time, it has a two month's delay. Paddy water requirement intensity is 6.1-8.2 mm/d and its change scale extent is less than that in central China. (2) Under the influence of "corridor-barrier" function on the Longitudinal Range-Gorge Region (LRGR), the paddy irrigation water requirement was related to latitude, longitude, and altitude. In the region of 23.5 degrees N with altitude 1550 m, the correlation coefficient between paddy irrigation water demand and latitude is 0.857, the irrigation quota ranges from 6240 to 8550 m(3)/hm(2); and affected by southwest and southeast monsoons in LRGR, the correlation coefficients between the paddy irrigation water demand and the longitude in the east bank and west bank of Red River great canyon are 0.631 and 0.913 respectively, and the irrigation quotas are 7260 -7440 m(3)/hm(2) and 5970-7740 m(3)/hm(2) respectively; the coefficient between paddy irrigation water demand and altitude at 100 E area is 0.636, the quota is 6240-8550 m(3)/hm(2).

关键词：蒸发作用灌溉需求季风水文学

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Effect of Three-High Rotary Piercing Process on Microstructure,Texture and Mechanical Properties of Magnesium Alloy Seamless Tube

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Acta Metallurgica Sinica(English Letters) 2024年第6期37卷 953-968页

作者： Xiaofeng Ding Zehao Wu Tong li Jianxun Chen yuanhua Shuang Baosheng liu Heavy Machinery Engineering Research Center of Education Ministry Taiyuan University of Science and TechnologyTaiyuan030024China College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan030024China

Mg alloy seamless tubes(MASTs)were prepared through three-high rotary piercing process,effect of billet temperature,feed angle and plug advance on microstructure,texture and mechanical properties of tubes were *** effect on the deformation mechanism and improving mechanical properties mechanism of this process for MASTs were *** results show that the grain size could be refined to 11.3-31.1%of the initial grain size and the microstructure was more uniform due to the accumulation of *** formation of high strain gradient at the grain boundary activated the non-basal *** piercing process could change the grain orientation of as-extruded billet and eliminate the initial basal texture to produce new favorable *** the process could accelerate the continuous dynamic recrystallization *** piercing,yield strength of pierced tubes decreased by 6.7%,ultimate tensile strength(UTS)and elongation increased by 32.4 and 45%,respectively,at optimal *** plate-shapedβ_(1)-Mg_(17)Al_(12) orientation transformed from basal plates to prismatic plates,facilitating the increase in UTS and *** decrease size of nanoscale precipitates could reduce the cracking *** critical resolved shear stress ratios of pyramidal(10−11)slip and(11−22)slip to basal slip for the sample including prismatic plates both decreased compared to that including basal *** could enhance the ductility of tube ***,grain boundary sliding could contribute to a better ductility via coordinating deformation and reducing stress concentration during piercing process.

关键词： Mg alloy tube Rotary piercing Microstructure Texture Mechanical properties

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Advancements in heterojunction,cocatalyst,defect and morphology engineering of semiconductor oxide photocatalysts

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Journal of Materiomics 2024年第2期10卷 315-338页

作者： Guojing Wang Shasha Lv yuanhua Shen Wei li linhan lin Zhengcao li State Key Laboratory of New Ceramics and Fine Processing Key Laboratory of Advanced Materials(MOE)School of Materials Science and EngineeringTsinghua UniversityBeijing100084China Key Laboratory of Beam Technology and Material Modification Ministry of EducationCollege of Nuclear Science and TechnologyBeijing Normal UniversityBeijing100875China School of Physical Science and Technology Lanzhou UniversityLanzhou730000China Department of Engineering Physics Tsinghua UniversityBeijing100084China State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision InstrumentTsinghua UniversityBeijing100084China

Photocatalytic technology has emerged as a crucial avenue for harnessing solar energy,presenting itself as a viable solution to address the current energy crisis and environmental *** past 50 years have witnessed significant progress and breakthroughs in scientific research on photocatalytic *** paper provides a comprehensive review of the mechanism of photocatalytic technology and methods to improve the photocatalytic efficiency of semiconductor photocatalysts,such as TiO 2 and *** this paper,common modification methods are divided into four categories:heterojunction con-struction,cocatalysts,defects,and morphological *** origin and development of photo-catalysts in each category are briefly summarized;moreover,the latest progress in each type of modification is discussed.S-scheme heterojunctions retain the high reduction and oxidation capacity of photogenerated electrons and holes by sacrificing half of the photogenerated carriers,showing excellent performance in photocatalysis and great application *** challenges associated with current modification schemes are *** is growing interest in quantitative and atomic-level modu-lation as attractive approaches to tackling these *** the electronic spin state and internal field is important for minimizing photogenerated carrier recombination in *** review will inspire researchers and promote the application of photocatalytic technology.

关键词： Photocatalytic activity Modification Heterostructure Thermal annealing Ion irradiation

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