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Role of intrinsic defects on carbon adsorbent for enhanced removal of Hg^(2+)in aqueous solution

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Chinese Journal of Chemical Engineering 2023年第9期61卷 129-139页

作者： Liu He Yiyang Qiu Chu Yao Guojun Lan Na Li Huacong Zhou Quansheng Liu xiucheng sun Zaizhe Cheng Ying Li Institute of Industrial Catalysis Zhejiang University of TechnologyHangzhou 310058China Inner Mongolia Key Laboratory of High-Value Functional Utilization of Low Rank Carbon Resources Huhhot 010051China

Carbon is a normally used adsorbent for removal of heavy metal ion in aqueous solutions,but the efficient adsorbent needs intensive modification by heteroatom doped or supported noble metals that cause severe pollution and easy leaching of active components during *** this paper,the role of intrinsic defects on Hg^(2+)adsorption for carbon adsorbent was *** maximum adsorbing capacity of defectrich carbon has been improved up to 433 mg·g^(-1)which is comparable to most of the modified carbon adsorbents via supported metal chloride or noble metal *** basicity is increased with the content of defective sites and the strong chemical bonding can be formed via electron transformation between the defect sites with adsorbed Hg^(2+).The present study gives a direction to explore cheap and easily scale-up high-performance mercury adsorbents by simply tuning the intrinsic defective structure of carbon without the necessity to support metal or other organic compounds.

关键词： Mercury-ion removal Adsorption Carbon adsorbent Defect sites

High-performance Cu/Zn O/Al_(2)O_(3) catalysts for methanol steam reforming with enhanced Cu-ZnO synergy effect via magnesium assisted strategy

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Journal of Energy Chemistry 2021年第12期30卷 550-557,I0013页

作者： Zaizhe Cheng Wenqiang Zhou Guojun Lan xiucheng sun Xiaolong Wang Chuan Jiang Ying Li Institute of Industrial Catalysis Zhejiang University of TechnologyHangzhou 310014ZhejiangChina

Methanol steam reforming(MSR) is an attractive approach to produce hydrogen for fuel *** to the limited catalyst loading volume and frequent start-ups and shut-downs on board,it is highly desired to develop an extremely active and robust ***,on the basis of industrial Cu/ZnO/Al_(2) O_(3) catalysts,a series of CuZnAl-xMg catalysts with enhanced Cu-ZnO synergy were synthesized via magnesium assisted *** incorporation of magnesium was found to be beneficial to the enhancement of catalytic activity and stability of catalyst.A combination of complementa ry characterizations(***,H_(2)-TPR,N_(2) O chemisorption,TEM,XPS analysis etc.) proves that isomorphous substitution of Cu^(2+)in malachite phase gives rise to more dispersive Cu and ZnO NPs,and the increased Cu^(+)/Cu~0 ratio indicates the strengthened Cu-ZnO synergy effect,which leads to the boosted stability during the thermal treatment.

关键词： Methanol steam reforming Cu/ZnO/Al_(2)O_(3) Doping Magnesium Hydrogen

Thermal and elemental analysis of the combustion chamber deposits in a large-scale two-stroke marine diesel engine

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Science China(Technological Sciences) 2015年第10期58卷 1717-1725页

作者： ZHANG XuSheng ZENG XiangMing sun xiucheng DENG Biao PENG GuanYun XIE HongLan WU ZhiJun XIAO TiQiao Merchant Marine College Shanghai Maritime University Shanghai Institute of Applied Physics Chinese Academy of Sciences School of Automotive Studies Tongji University

It is of significance to understand the chemical content of carbon deposits in the large-scale two-stroke(LSTS) marine diesel engine because of adverse effect on the engine performance, oil consumption and emissions. In this work, two different combustion chamber deposits in an LSTS marine diesel engine were studied using thermogravimetry analysis(TGA), elemental analysis(EA) and synchrotron X-ray fluorescence(SXRF). One was on the piston top and the other on the piston land, termed PTCD and PLCD, respectively. For the PTCD sample, the 97% residue in the TGA and 1.4% carbon content in the EA indicated the main compositions of PTCD were metal salts or oxides and ashes, significantly different from the previous findings of the highest carbon content in deposits from the small four stroke engines. The different chemical content between PTCD and PLCD implied higher thermal load in the LSTS marine diesel engine led to a nearly complete thermal decomposition of PTCD. The higher calcium content in PTCD and PLCD indicated the additives of cylinder oil should be the main source of metal content of PTCD and PLCD. Calcium distribution in the SXRF results was indicative of the potential layered structure in PTCD and PLCD. In addition, the appearance of iron on the surface against the piston in PTCD and PLCD indicated iron oxides formation between carbon deposit and piston materials.

关键词： combustion chamber deposits thermogravimetry analysis elemental analysis marine diesel engine synchrotron X-rayfluorescence spectrometry

Distinguished biological adaptation architecture aggravated population differentiation of Tibeto-Burman-speaking people

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Journal of Genetics and Genomics 2024年第5期51卷 517-530页

作者： Yuntao sun Mengge Wang Qiuxia sun Yan Liu Shuhan Duan Zhiyong Wang Yunyu Zhou Jun Zhong Yuguo Huang Xinyu Huang Qingxin Yang Xiangping Li Haoran Su Yan Cai xiucheng Jiang Jing Chen Jiangwei Yan Shengjie Nie Liping Hu Junbao Yang Renkuan Tang Chuan-Chao Wang Chao Liu Xiaohui Deng Libing Yun Guanglin He West China School of Basic Science&Forensic Medicine Sichuan UniversityChengduSichuan 610041China Institute of Rare Diseases West China Hospital of Sichuan UniversitySichuan UniversityChengduSichuan 610000China Center for Archaeological Science Sichuan UniversityChengduSichuan 610000China Faculty of Forensic Medicine Zhongshan School of MedicineSun Yat-sen UniversityGuangzhouGuangdong 510275China Guangzhou Forensic Science Institute GuangzhouGuangdong 510055China Department of Forensic Medicine College of Basic MedicineChongqing Medical UniversityChongqing 400331China School of Clinical Medical Sciences North Sichuan Medical CollegeNanchongSichuan 637100China School of Basic Medical Sciences North Sichuan Medical CollegeNanchongSichuan 637100China School of Forensic Medicine Kunming Medical UniversityKunmingYunnan 650500China School of Stomatology North Sichuan Medical CollegeNanchongSichuan 637100China Department of Medical Laboratory North Sichuan Medical CollegeNanchongSichuan 637007China School of Life Sciences Xiamen UniversityXiamenFujian 361005China Anti-Drug Technology Center of Guangdong Province GuangzhouGuangdong 510230China School of Forensic Medicine Shanxi Medical UniversityJinzhongShanxi030600China

Tibeto-Burman(TB)people have endeavored to adapt to the hypoxic,cold,and high-UV high-altitude environments in the Tibetan Plateau and complex disease exposures in lowland rainforests since the late Paleolithic ***,the full landscape of genetic history and biological adaptation of geographically diverse TB-speaking people,as well as their interaction mechanism,remain ***,we generate a whole-genome meta-database of 500 individuals from 39 TB-speaking populations and present a comprehensive landscape of genetic diversity,admixture history,and differentiated adaptative features of geographically different TB-speaking *** identify genetic differentiation related to geography and language among TB-speaking people,consistent with their differentiated admixture process with incoming or indigenous ancestral source populations.A robust genetic connection between the Tibetan-Yi corridor and the ancient Yellow River people supports their Northern China origin *** finally report substructure-related differentiated biological adaptative signatures between highland Tibetans and Loloish *** signatures associated with the physical pigmentation(EDAR and SLC24A5)and metabolism(ALDH9A1)are identified in Loloish people,which differed from the high-altitude adaptative genetic architecture in ***-related genomic resources provide new insights into the genetic basis of biological adaptation and better reference for the anthropologically informed sampling design in biomedical and genomic cohort research.

关键词： Tibeto-Burman people Genetic profile Natural selection Genetic diversity Biological adaptation

带拼缝陶粒泡沫混凝土夹层叠合板抗弯性能研究

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建筑结构 2023年第S1期53卷 1259-1265页

作者：孙修成李振宝张良刘春阳北京工业大学城市与工程安全减灾教育部重点实验室北京100124 山东建筑大学土木工程学院济南250101

提出3种陶粒泡沫混凝土夹层叠合板拼缝形式,在实现叠合板保温减重的前提下,优化叠合板拼缝构造。对5块叠合板进行静力加载试验,对比采用不同拼缝构造的叠合板的破坏形态、承载力及受力筋、拼缝连接件的受力规律。结果表明:3种拼缝构造... 详细信息

提出3种陶粒泡沫混凝土夹层叠合板拼缝形式,在实现叠合板保温减重的前提下,优化叠合板拼缝构造。对5块叠合板进行静力加载试验,对比采用不同拼缝构造的叠合板的破坏形态、承载力及受力筋、拼缝连接件的受力规律。结果表明:3种拼缝构造可以实现正常传力;整体式拼缝的叠合板,拼缝区域对应的中间层混凝土种类对此拼缝形式的抗弯性能无明显影响;采用密拼式拼缝的叠合板,密拼式拼缝的预埋钢筋、预埋钢板会和周围的底部受拉钢筋共同受力,密拼式拼缝-钢板搭接式的附加钢板及底部钢板主要起到传力的作用;在叠合面未发生明显滑移前,各带拼缝叠合板的承载力、刚度与无拼缝叠合板接近。有限元软件ABAQUS模拟结果表明:采用整体式拼缝的叠合板可以实现与无拼缝叠合板承载力“等强”的效果,采用密拼式拼缝-钢筋焊接式、密拼式拼缝-钢板搭接式的叠合板承载力大于无拼缝叠合板。

关键词：陶粒泡沫混凝土夹层叠合板拼缝承载力

High-loading and thermally stable Pt1/MgAl1.2Fe0.8O4 single-atom catalysts for high-temperature applications

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Science China Materials 2020年第6期63卷 949-958页

作者： Kaipeng Liu Yan Tang Zhiyang Yu Binghui Ge Guoqing Ren Yujing Ren Yang Su Jingcai Zhang xiucheng sun Zhiqiang Chen Aiqin W ang Jun Li CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Beijing 100049China Department of Chemistry&Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education Tsinghua UniversityBeijing 100084China State Key Laboratory of Photocatalysis on Energy and Environment College of ChemistryFuzhou UniversityFuzhou 350002China Institute of Physical Science and Information Technology Anhui UniversityHefei 230601China Department of Chemistry Southern University of Science and TechnologyShenzhen 518055China

Single-atom catalysts(SACs)have attracted extensive attention in the field of heterogeneous ***,the fabrication of SACs with high loading and hightemperature stability remains a grand challenge,especially on oxide *** this work,we have demonstrated that through strong covalent metal-support interaction,highloading and thermally stable single-atom Pt catalysts can be readily prepared by using Fe modified spinel as *** catalytic performance in N2O decomposition reaction is obtained on such SACs than their nanocatalyst counterpart and low-surface-area Fe2O3 supported Pt *** work provides a strategy for the fabrication of high-loading and thermally stable SACs for applications at high temperatures.

关键词： high loading thermal stability single-atom catalyst strong covalent metal-support interaction N20 decomposition

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陶粒泡沫混凝土夹层叠合板受弯性能研究

建筑结构 2023年第S2期53卷 967-972页

作者：张良李振宝孙修成刘春阳北京工业大学城市与工程安全减灾教育部重点实验室北京100124 山东建筑大学土木工程学院济南250101

传统混凝土叠合板保温效果差且自重较大,现有夹芯叠合板夹层有机材料易燃且强度较低,和上下层混凝土协同工作能力较差。本文提出了保温承重一体化的夹层叠合楼板,将叠合板中和轴附近受力较小的部分替换为具有减重保温效果的陶粒泡沫混... 详细信息

传统混凝土叠合板保温效果差且自重较大,现有夹芯叠合板夹层有机材料易燃且强度较低,和上下层混凝土协同工作能力较差。本文提出了保温承重一体化的夹层叠合楼板,将叠合板中和轴附近受力较小的部分替换为具有减重保温效果的陶粒泡沫混凝土。为研究陶粒泡沫混凝土夹层叠合板的抗弯性能,进行了3块楼板的静力加载试验。结果表明:陶粒泡沫混凝土夹层叠合板与普通混凝土现浇板的受弯过程相似,裂缝发展规律和分布较为一致,呈典型的单向板破坏现象,且剪跨比较小的叠合板截面所能承受的最大弯矩略高于整浇板。陶粒泡沫混凝土夹层叠合板具有良好的工作性能,未出现局部破坏导致的承载力突降现象。本文提出的建模方法与试验拟合较好,结合ABAQUS有限元分析结果,该设计在大幅减轻自重增强保温效果的同时可以满足承载力要求。

关键词：陶粒泡沫混凝土夹层叠合板受弯性能静力试验数值模拟

预制陶粒泡沫混凝土夹层复合剪力墙轴心受压性能研究

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建筑结构 2023年第S1期53卷 1253-1258页

作者：汪攀李振宝孙修成刘春阳北京工业大学城市与工程安全减灾教育部重点实验室北京100124 山东建筑大学土木工程学院济南250101

通过对5片不同拉结筋间距、中间层厚度的陶粒泡沫混凝土夹层复合剪力墙试件进行轴心受压试验,研究其在轴心荷载作用下的承载力、变形性能、裂缝发展规律、破坏过程以及破坏形式。结果表明:陶粒泡沫混凝土夹层复合剪力墙轴心受压破坏形... 详细信息

通过对5片不同拉结筋间距、中间层厚度的陶粒泡沫混凝土夹层复合剪力墙试件进行轴心受压试验,研究其在轴心荷载作用下的承载力、变形性能、裂缝发展规律、破坏过程以及破坏形式。结果表明:陶粒泡沫混凝土夹层复合剪力墙轴心受压破坏形式主要可分为墙板剥离破坏和轴心受压破坏,发生墙板剥离破坏的试件轴心受压承载力较低;发生轴心受压破坏的试件轴心受压承载力较高。当拉结筋间距不大于600mm时,拉结筋间距对墙体的轴心受压承载力影响不大,但减小拉结筋间距能有效缓解界面裂缝的开展与延伸,而未设置拉结筋墙体的轴心受压承载力将显著降低;建议实际工程中陶粒泡沫混凝土夹层复合剪力墙应设置拉结筋,且拉结筋间距不应超过200mm。采用中国规范计算各试件轴心受压承载力时,对于破坏形式为轴心受压破坏的试件,公式计算值与试验值吻合良好。

关键词：陶粒泡沫混凝土夹层复合剪力墙轴心受压试验承载力破坏形式

Identifying the active state of Ir species supported on Al2O3 for formaldehyde oxidation at ambient temperature

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Identifying the active state of Ir species supported on Al2O...