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盱眙、明光、临泽坡缕石的八面体阳离子占位及对其性能的影响

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地质学报 2024年第3期98卷 876-888页

作者：廖立兵张培均刘昊中国地质大学(北京)材料科学与工程学院北京100083 中国地质大学(北京)数理学院北京100083

坡缕石是一种2:1型链层状结构含水富镁铝硅酸盐矿物,具有重要的资源和材料属性。不同成因、产状坡缕石八面体中类质同象替代有很大差别,而八面体类质同象替代对坡缕石性能的影响未见研究报道。本文以中国最具代表性的安徽明光、江苏盱... 详细信息

坡缕石是一种2:1型链层状结构含水富镁铝硅酸盐矿物,具有重要的资源和材料属性。不同成因、产状坡缕石八面体中类质同象替代有很大差别,而八面体类质同象替代对坡缕石性能的影响未见研究报道。本文以中国最具代表性的安徽明光、江苏盱眙、甘肃临泽坡缕石为研究对象,研究了三种坡缕石的Al、Mg、Fe含量及在八面体中的占位,并探讨了八面体的Al、Mg、Fe占位对坡缕石中水的种类和含量、表面电位和酸位以及对Pb^(2+)、Cd^(2+)吸附性能的影响。结果表明:明光坡缕石相对富镁,八面体主要被Mg^(2+)占据,具有三八面体特征;盱眙、临泽坡缕石相对富铝、铁,八面体主要被Al^(3+)占据,表现出更多的二八面体特征。盱眙坡缕石由于M1位置空位较多,结构水含量较低;坡缕石类质同象替代对Zeta电位影响不大;具有二八面体特征的盱眙、临泽坡缕石由于八面体中Al含量较高,酸位较多,催化性能较好。在重金属吸附实验中,明光坡缕石对Cd^(2+)的吸附效果最好,盱眙坡缕石对Pb^(2+)的吸附效果最好,临泽坡缕石吸附性能较差。本文可为坡缕石的改性和应用提供指导和参考。

关键词：坡缕石类质同象替代八面体占位吸附性能

Mssbauer spectroscopic study of Fe-Mg tourmalines with different Fe contents

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Science China Earth Sciences 2012年第9期55卷 1489-1493页

作者： ZHAO ChangChun liao libing School of Materials Science and Technology China University of GeosciencesBeijing 100083China

We studied four tourmalines with different Fe contents from Xinjiang,Sichuan,and Yunnan provinces of China using Mossbauer spectroscopy and single crystal X-ray *** valence and location of Fe in the four tourmalines and two heat-treated tourmalines have been *** experimental results showed that Fe in the four tourmalines at room temperature had two valence states and two locations,***2＋（Y）,Fe2＋（Z）,Fe3＋（Y）.After being heated at 850℃ for 48 and 72 h,Fe elements in tourmaline were nearly completely oxidized and mainly occupied Y sites,and a small amount of Fe3＋ shifted to Z ***,the amount of mixed valence state Fe 2.5＋ progressively increased with heating time,and electron delocalization occurred between the adjacent sites [Fe2＋-Fe3＋].

关键词： tourmaline Mossbauer spectroscopy next nearest neighbor effect heat treatment

西部地区基层医疗资源配置-经济发展-科技创新耦合协调发展研究

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卫生软科学 2024年第5期38卷 59-64页

作者：廖丽冰曾志羽广西医科大学广西南宁530021 广西心脑血管疾病临床医学研究中心广西南宁530021

[目的]探索我国西部地区基层医疗资源配置、经济发展与科技创新之间的耦合协调关系,为西部地区均衡发展提供参考。[方法]构建耦合协调度模型,对2012-2021年三系统之间的时空耦合协调特征进行实证分析,并预测未来5年的演变趋势。[结果]... 详细信息

[目的]探索我国西部地区基层医疗资源配置、经济发展与科技创新之间的耦合协调关系,为西部地区均衡发展提供参考。[方法]构建耦合协调度模型,对2012-2021年三系统之间的时空耦合协调特征进行实证分析,并预测未来5年的演变趋势。[结果]耦合协调度均值由2012年的0.378上升到2021年的0.644,年均增长率达6.46%,增幅为70.37%,耦合协调度呈“中间高、四周低”的空间格局,预计到2026年11个省份基本进入协调发展阶段。[结论]综合发展水平表现为基层医疗资源配置>经济发展>科技创新,耦合协调度呈平稳上升趋势,但整体发展水平不高,地区差异显著且持续存在。各地区应根据自身资源禀赋,探索发展道路,实现区域优质协调发展。

关键词：基层卫生资源配置经济发展科技创新耦合协调西部地区

复合矿物介质动态去除重金属多污染物实验研究

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矿物学报 2024年第4期44卷 526-538页

作者：程国洋夏银廖立兵王丽娟刘昊吕国诚中国地质大学(北京)材料科学与工程学院矿物材料国家专业实验室非金属矿物与固废资源材料化利用北京市重点实验室地质碳储与资源低碳利用教育部工程研究中心北京100083 中国地质大学(北京)数理学院北京100083

本文针对广西某多金属矿山尾矿库渗滤液造成的地下水污染问题,以蛭石、十六烷基三甲基溴化铵(CTAB)改性蛭石及赤铁矿作为PRB复合介质材料,进行了动态去除水中多污染物Cu^(2+)、Zn^(2+)、Mn^(2+)、CrO_(4)^(2–)的实验,研究了三种介质材... 详细信息

本文针对广西某多金属矿山尾矿库渗滤液造成的地下水污染问题,以蛭石、十六烷基三甲基溴化铵(CTAB)改性蛭石及赤铁矿作为PRB复合介质材料,进行了动态去除水中多污染物Cu^(2+)、Zn^(2+)、Mn^(2+)、CrO_(4)^(2–)的实验,研究了三种介质材料的组装方式对多种污染物的去除行为。动态吸附实验表明,介质的不同组装方式会影响体系的p H值,及吸附柱对多污染物的去除效果。通过对反应前后矿物介质的物相、形貌等测试表征,讨论了矿物介质材料对污染物的去除机理。赤铁矿以表面吸附为主,蛭石、CTAB改性蛭石以离子交换为主,也存在表面吸附等过程。以上成果为复合矿物介质实际用于重金属污染地下水的原位修复奠定了重要基础。

关键词： PRB 复合矿物介质动态吸附多污染物组装方式

Reviews:Microwave-induced oxidation technology and its applications

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Progress in Natural Science:Materials International 2022年第6期32卷 665-673页

作者： Lintao Tian Guocheng Lv Meng Liu Xinyu Lei Wenxiu Rao libing liao Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral Materials School of Materials Science and Technology China University of Geosciences

Microwave-induced oxidation,as a new,efficient and green technology,is favored by researchers for its advantage of fast,high efficiency and no secondary *** is known as "green chemistry" for its characteristics of reducing energy consumption and *** representative results review the research progress of microwave-induced oxidation technology in the treatment of organic wastewater and volatile organic compounds,hydrogen production and combination with other technologies to induce oxidation,and the development direction and prospects of microwave-induced oxidation technology have been summarized in this paper.

关键词： Microwave-induced oxidation Organic wastewater Hydrogen production Advanced oxidation

Influence of dysprosium concentration on sensitivity of luminescent thermometers of phosphors Ca_(9)Tb(PO_(4))_(5)(SiO_(4))F_(2)

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Journal of Rare Earths 2021年第8期39卷 946-951页

作者： Jingxue Zhang Lefu Mei Yuanyuan Zhang Qingfeng Guo libing liao Haikun Liu Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of GeosciencesBeijing 100083China School of Materials Science and Engineering Dongguan University of TechnologyDongguan 523808China School of Gemmology China University of GeosciencesBeijing 100083China School of Chemical Engineering and Energy Technology Dongguan University of TechnologyDongguan 523808China

Tb^(3+),Dy^(3+)-co-doped Ca_(9)Tb_(x)Dy_(1-x)(PO_(4))_(5)(SiO_(4))F_(2) phosphors were prepared via high-temperature solidphase reaction method and the potential application in optical temperature measurements due to their color-tunable property was investigated in *** photoluminescence emission(PL) and photoluminescence excitation(PLE) spectra results show that the as-prepared phosphors exhibit both Tb^(3+) and Dy^(3+) emissions at 546 nm(^(5)D_(4)-^(7)F_(5) transition of Tb^(3+)) and 587 nm(^(4)F_(9/2)-^(6)H_(13/2) transition of Dy^(3+)) upon 376 nm excitation,*** addition,the fluorescence decay analysis shows that the lifetime of the Tb3+emission rapidly decreases,which confirms the energy transfer existence between Dy^(3+) and Tb^(3+).Under 376 nm excitation,the temperature dependence of the fluorescence intensity ratios for the dualmission bands peaked at 546 and 587 nm was studied in the temperature range from 303 to 573 *** results show that with the increase of Dy^(3+) concentration,the relative sensitivity first increases and then decreases,what’s more,the maximum relative sensitivity is 3.142×10^(-3)%/K for Ca_(9)Tb_(x)Dy_(1-x)(PO_(4))_(5)(SiO_(4))F_(2)(x=0.4).As a consequence,this preliminary study provides a novel method for exploring the novel thermo meters.

关键词： Temperature measurement Apatite Fluorescence intensity ratios Phosphor Thermometers Rare earths

Crystal structure refinement of suolunite and its significance to the cement techniques

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Chinese Science Bulletin 1999年第23期44卷 2125-2130页

作者： Zhesheng Ma Nicheng Shi Guodong Mou libing liao China Univ Geosci Xray Lab Beijing 100083 Peoples R China

Based on the crystal structure refinement, the arrangement and characteristics of the double tetrahedra of Si-O backbone of suolunite have been precisely clarified. The double tetrahedra are isolated, and the orientations of the closely adjacent double tetrahedra are perpendicular to each other, which results in the poor cleavage and high hardness of suolunite. Com-

关键词： suolunite crystal structure C-S-H gel cement manufacturing techniques.

Recent progress on lanthanide complexes/clay minerals hybrid luminescent materials

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Journal of Rare Earths 2022年第9期40卷 1360-1370,I0001页

作者： Ga Zhang Lefu Mei Junjie Ding Ke Su Qingfeng Guo Guocheng Lv libing liao Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of GeosciencesBeijing 100083China School of Gemmology China University of GeosciencesBeijing 100083China

The unique luminescent performance of lanthanide complexes/clay minerals hybrid materials has been fascinating many researchers for recent *** not only retains the excellent luminescent characteristics of lanthanide complexes but also improves the poor stability of the *** this article,we introduce the luminescence mechanism of lanthanide complexes and point out the necessity of their combination with clay *** the analysis of the structure and interlayer environment differences of 1:1-type and 2:1-type clay minerals,the intercalation methods(covalent grafting and ion exchange)appropriate for different clay minerals are summarized with *** on the luminescence characteristics of the hybrid materials,the applications of these materials as luminescent probes in recognition of specific metal cations and molecules,detection of pH value,and temperature are ***,the current problems in the preparation of lanthanide complexes/clay minerals hybrid luminescent materials and shortcomings that need improvement in their performance are analyzed,and the application prospect is forecast.

关键词： Luminescence Hybrid materials Lanthanide complexes Clay minerals Luminescent probes Rare earths

A novel blue-purple Ce^(3+) doped whitlockite phosphor:Synthesis,crystal structure,and photoluminescence properties

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Journal of Rare Earths 2021年第6期39卷 621-626,I0001页

作者： Yuli Yuan Haoran Lin Jing'ao Cao Qingfeng Guo Fei Xu libing liao Lefu Mei School of Gemology China University of GeosciencesBeijing 100083China Jewelry and Mineral Materials Laboratory of Experimental Teaching Demonstration Center Beijing 100083China School of Information Engineering China University of GeosciencesBeijing 100083China Academy of Arts&Design Tsinghua UniversityBeijing 100084China Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral MaterialsSchool of Materials Sciences and TechnologyChina University of GeosciencesBeijing 100083China

At present,the rare earth(RE) ions doped phosphors have attracted more and more attention because of their excellent *** this paper,a series of novel blue-purple β-Ca_(3)(PO_(4))_(2):Ce^(3+) phosphors were synthesized by a high temperature solid phase *** X-ray diffraction(XRD),infrared spectrum,energy dispersive spectroscopy(EDS),scanning electron microscopy(SEM),X-ray photoelectron spectroscopy(XPS),photoluminescence excitation and emission spectra were used to investigate the crystal structure,composition and the luminescent properties of the resulting *** phosphor shows a strong absorption in the ultraviolet *** the excitation of 269 nm,the phosphor emits a strong purple fluorescence ranging from 360 to 520 *** Ce^(3+) doping content is 0.07 mol,the strongest luminescence intensity is reached,and the concentration quenching mechanism is dipole-dipole(d-d)interaction for Ce^(3+) based on Dexter theory.

关键词： Whitlockite Ce^(3+) Phosphor β-Ca_(3)(PO_(4))_(2) Rare Earths