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Metal-Support Interactions on Ag/Co_(3)O_(4)Nanowire Monolithic Catalysts Promoting Catalytic Soot Combustion

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Transactions of Tianjin University 2022年第3期28卷 174-185页

作者： Xingwang Yi Yuexi Yang Dawei Xu Ye Tian Song Song Chunmei Cao xingang li School of Chemical Engineering&Technology Tianjin UniversityTianjin 300350China Institute of Shaoxing Tianjin UniversityShaoxing 312000China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin Key Laboratory of Applied Catalysis Science and EngineeringTianjin UniversityTianjin 300350China School of Chemical Engineering Zhengzhou UniversityZhengzhou 45000China

Tuning metal-support interactions(MSIs)is an important strategy in heterogeneous catalysis to realize the desirable metal dispersion and redox ability of metal ***,we use pre-reduced Co_(3)O_(4)nanowires(Co-NWs)in situ grown on monolithic Ni foam substrates to support Ag catalysts(Ag/Co-NW-R)for soot *** macroporous structure of Ni foam with crossed Co_(3)O_(4)nanowires remarkably increases the soot-catalyst contact effi *** characterization results demonstrate that Ag species exist as Ag 0 because of the equation Ag^(+)+Co^(2+)=Ag^(0)+Co^(3+),and the pre-reduction treatment enhances interactions between Ag and Co_(3)O_(4).The number of active oxygen species on the Ag-loaded catalysts is approximately twice that on the supports,demonstrating the signifi cant role of Ag sites in generating active oxygen ***,the strengthened MSI on Ag/Co-NW-R further improves this number by increasing metal dispersion and the intrinsic activity determined by the turnover frequency of these oxygen species for soot oxidation compared with the catalyst without pre-reduction of Co-NW(Ag/Co-NW).In addition to high activity,Ag/Co-NW-R exhibits high catalytic stability and water *** strategy used in this work might be applicable in related catalytic systems.

关键词： Metal-support interaction Monolithic catalysts Ag Co_(3)O_(4)nanowires Soot oxidation

Response gene to complement 32 （RGC-32） expression on M2-polarized and tumor-associated macrophages is M-CSF-dependent and enhanced by tumor-derived IL-4

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Cellular & Molecular Immunology 2015年第6期12卷 692-699页

作者： Peng Zhao Daiqing Gao Qingjie Wang Bingfeng Song Qianqian Shao Jintang Sun Chunyan Ji xingang li Peng li Xun Qu Institute of Basic Medical Sciences Qilu Hospital Shandong University Jinan China Biotherapy Center Qingdao Central Hospital the Second Affiliated Hospital Qingdao University Medical College Qingdao China Neurosurgery Qilu Hospital of Shandong University Jinan China

Response gene to complement 32 （RGC-32） is a cell cycle regulator involved in the proliferation, differentiation and migration of cells and has also been implicated in angiogenesis. Here we show that RGC-32 expression in macrophages is induced by IL-4 and reduced by LPS, indicating a link between RGC-32 expression and M2 polarization. We demonstrated that the increased expression of RGC-32 is characteristic of alternatively activated macrophages, in which this protein suppresses the production of pro-inflammatory cytokine IL-6 and promotes the production of the anti-inflammatory mediator TGF-β. Consistent with in vitro data, tumor-associated macrophages （TAMs） express high levels of RGC-32, and this expression is induced by tumor-derived ascitic fluid in an M-CSF- and/or IL-4-dependent manner. Collectively, these results establish RGC-32 as a marker for M2 macrophage polarization and indicate that this protein is a potential target for cancer immunotherapy, targeting tumor-associated macrophages.

关键词： macrophage polarization monocyte response gene to complement 32

Decorating Ag/AgCl on UiO-66-NH2: Synergy between Ag plasmons and heterostructure for the realization of efficient visible light photocatalysis

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Chinese Journal of Catalysis 2019年第8期40卷 1187-1197页

作者： Wanyue Zhao Tong Ding Yating Wang Moqing Wu Wenfeng Jin Ye Tian xingang li Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin Key Laboratory of Applied Catalysis Science and EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China

UiO-66-NH2, as typical visible light responsive Zr-based metal-organic frameworks (MOFs), has attracted great interest in recent years. However, rapid combination of the photoinduced carriers limits its further application. Here, we designed a facile precipitation-photoreduction method to post-synthetically decorate Ag/AgCl on the surface of UiO-66-NH2 and form a heterostructure. Metallic Ag can not only transmit electrons between UiO-66-NH2 and AgCl but also absorb visible light, because of the surface plasmon resonance (SPR) effect. The rhodamine B photodegradation rate of UiO-66-NH2/Ag/AgCl (16.2 wt.% Ag) is about 10 and 4 times those of UiO-66-NH2 and Ag/AgCl, respectively. The SPR effect of Ag NPs and the formation of a heterostructure synergistically increase the absorbability of visible light, accelerate the separation of photoinduced charges, and promote the formation of superoxide radicals. We expect that our work could provide a new viewpoint for constructing efficient MOF-based photocatalytic systems.

关键词： UiO-66-NH2 Ag/AgCl Heterostructure Visible light photocatalysis Superoxide radical

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基于北斗/GNSS-R的厘米级水位测量

中国防汛抗旱 2024年第4期34卷 34-40页

作者：张光霁匡翠林戴吾蛟李新刚包泽宇中南大学地球科学与信息物理学院长沙410083 中国空间技术研究院北京100094

水位变化监测是防洪抗旱的重点工作之一,全球导航卫星系统反射测量(Global Navigation Satellite System-Reflectome‐try,GNSS-R)技术已被证明可进行高精度、全天候、全天时的水位变化监测。我国北斗卫星导航系统(Beidou Navigation Sa... 详细信息

水位变化监测是防洪抗旱的重点工作之一,全球导航卫星系统反射测量(Global Navigation Satellite System-Reflectome‐try,GNSS-R)技术已被证明可进行高精度、全天候、全天时的水位变化监测。我国北斗卫星导航系统(Beidou Navigation Satellite System,BDS)拥有丰富的频段数据,在GNSS-R遥感应用领域中具有广阔的应用前景。基于湖南省浏阳河流域建设的GNSS-R实验观测站数据,进一步研究了BDS在水位反演中的性能,分别采用频谱分析法和非线性拟合法对站点水位变化进行测量,并将实验结果与附近水文站的实测数据进行对比分析。结果表明,非线性拟合法相较于频谱分析法,水位测量精度大幅提升,均方根误差(RMSE)平均降低了66%,且多频数据融合后RMSE达到了1.8 cm,整体上BDS的水位反演性能与GPS相当。

关键词：全球导航卫星系统反射测量(GNSS-R) 水位测量北斗卫星导航系统湖南省

Combining bioactive compounds and antioxidant activity profiling provide insights into assessment of geographical features of Chinese jujube

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Food Bioscience 2022年第2期46卷 605-616页

作者： Cheng Wang Rui Wang Chendan Fu Xiaoxuan Jiang xingang li Gang Han Jingfang Zhang Department of Forestry Engineering College of ForestryNorthwest A&F UniversityYanglingShaanxi712100China Center for Jujube Engineering and Technology of State Forestry Administration Northwest A&F UniversityYanglingShaanxi712100China

As the largest jujube cultivating areas of the world,the market price and quality of Chinese jujube are obviously affected by its producing regions in ***,traceability of Chinese jujube has become an important *** search the suitable geographical labels of Chinese jujube,26 major cultivars from five geographical regions of China were investigated by evaluating their bioactive compounds and antioxidant activity *** statistical techniques(e,g.,PCA,PLS,VIP value)applied to the above-obtained data were further used to identify geographical origin in different areas of Chinese *** results indicated that the highest median contents of total phenols(TP)and flavonoids(TF)of Chinese jujube were originated from Ningxia and Henan provinces,both of which also exhibited the stronger bioactivity.p-Hydroxybenzoic acid and rutin exhibited the highest contents among the all detected individual phenolic *** highest median contents of cyclic adenosine monophosphate(cAMP),cyclic guanosine monophosphate(cGMP)and polysaccharides were all found in Chinese jujube samples of Xinjiang *** particular,p-hydroxybenzoic acid,rutin,cAMP,cGMP and polysaccharides can be regarded as the potential biomarkers in distinguishing the geographical origin of Chinese ***,the high altitude and latitude might be benefit for the accumulation of cAMP,cGMP and polysaccharides(primary metabolites),and high longitude and annual precipitation maybe improve the contents of TP and TF(secondary metabolites).These information could provide an effective methods in distinguishing the geographical features of Chinese jujube,and also be benefit for the products development.

关键词： Chinese jujube Geographical features Bioactive constituents Antioxidant activity

Isolated zinc in mordenite stabilizing carbonylation of dimethyl ether to methyl acetate

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Chinese Chemical Letters 2019年第2期30卷 513-516页

作者： Zhitao Zhang Na Zhao Kui Ma Qingpeng Cheng Jing Zhang lirong Zheng Ye Tian xingang li Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin Key Laboratory of Applied Catalysis Science and EngineeringSchool of Chemical Engineering and Technology Tianjin University Beijing Synchrotron Radiation Facility Institute of High Energy Physics Chinese Academy of Sciences

Herein, we prepared a series of H-Zn-mordenite (H-Zn-MOR) catalysts by adding zinc source into the initial sols during the synthesis of mordenite (MOR). The results indicated that isolated Zn ions were highly dispersed in the catalysts. The addition of zinc led to the increase of Si/Al in the framework of MOR,the change of the distribution of acid sites and the change of acid strength. We investigated the catalytic performance of the H-Zn-MOR catalysts and the HMOR catalysts for carbonylation of dimethyl ether to methyl acetate. The addition of zinc improved the catalytic performance and made the drop of the conversion over the Zn-0.003 and Zn-0.005 catalysts to be about the half of that over the HMOR *** attributed it to the change of the acid properties, which further change the rate of coke deposition.

关键词： Zinc Mordenite Dimethyl ether Carbonylation Acidic property

Phylogenomic analysis of transcriptomic sequences of mitochondria and chloroplasts for marine red algae(Rhodophyta)in China

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Acta Oceanologica Sinica 2014年第2期33卷 86-93页

作者： JIA Shangang WANG Xumin QIAN Hao li Tianyong SUN Jing WANG liang YU Jun li xingang YIN Jinlong liU Tao WU Shuangxiu CAS Key Laboratory of Genome Sciences and Information Beijing Key Laboratory of Genome and Precision Medicine TechnologiesBeijing Institute of GenomicsChinese Academy of Sciences Beijing Key Laboratory of Functional Genomics for Dao-di Herbs Beijing Institute of GenomicsChinese Academy of Sciences College of Marine life Science Ocean University of China University of Chinese Academy of Sciences

The chloroplast and mitochondrion of red algae （Phylum Rhodophyta） may have originated from different endosymbiosis. In this study, we carried out phylogenomic analysis to distinguish their evolutionary lin-eages by using red algal RNA-seq datasets of the 1 000 Plants （1KP） Project and publicly available complete genomes of mitochondria and chloroplasts of Rhodophyta. We have found that red algae were divided into three clades of orders, Florideophyceae, Bangiophyceae and Cyanidiophyceae. Taxonomy resolution for Class Florideophyceae showed that Order Gigartinales was close to Order Halymeniales, while Order Graci-lariales was in a clade of Order Ceramials. We confirmed Prionitis divaricata （Family Halymeniaceae） was closely related to the clade of Order Gracilariales, rather than to genus Grateloupia of Order Halymeniales as reported before. Furthermore, we found both mitochondrial and chloroplastic genes in Rhodophyta under negative selection （Ka/Ks〈1）, suggesting that red algae, as one primitive group of eukaryotic algae, might share joint evolutionary history with these two organelles for a long time, although we identified some dif-ferences in their phylogenetic trees. Our analysis provided the basic phylogenetic relationships of red algae, and demonstrated their potential ability to study endosymbiotic events.

关键词： red algae Rhodophyta phylogenetic trees mitochondrion chloroplast

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Effect of SO_4^(2-)/ZrO_2 on Catalytic Activity of Rh/γ-Al_2O_3-Zr for Selective Reduction of NO by C_2H_4

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催化学报 2000年第6期21卷 513-514页

作者：肖莉林培琰 Department of Chemical Physics Univ. of Sci./Technology of China China

The selective reduction of NO by hydrocarbons in the presence of excess O2 was studied as a potential route to remove NO from exhaust gases. In this study, 15% ZrO2 as the thermal stabilizer was doped into 0.5% Rh/γ-Al2O3, and the synergetic effect between Rh/γ-Al2O3-Zr and solid superacid SO42-/ZrO2 for NO + C2H4 + O2 reaction was explored. For the selective reduction of NO by C2H4 on Rh/γ-Al2O3-Zr, solid superacid should contact with active sites of Rh/γ-Al2O3-Zr to give an effective activity. It means that the transportation of NO2 from SO42-/ZrO2 onto Rh/γ-Al2O3-Zr through gas phase is effective only for a short distance. However, combining TPD of NO + O2 and activity test results, another explanation is also possible, in which all the reaction stages may occur on the interface of Rh and the support, and the main function of SO42-/ZrO2 is to adsorb and concentrate NO. The adsorbed NO migrates from SO42-/ZrO2 to the interface of Rh and γ-Al2O3 and reacts with the adsorbed O2 species on Rh sites to form the intermediate active NO2 which then reacts with C2H4 to form N2 on the active sites.

关键词：一氧化氮乙烯选择还原催化剂

Preface:Selected papers from The 7th Global Chinese Chemical Engineers Symposium

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Chinese Journal of Chemical Engineering 2018年第7期26卷 1443-1443页

作者： xingang li School of Chemical Engineering&Technology Tianjin UniversityChina National Engineering Research Center for Distillation Technology China

The 7th Global Chinese Chemical Engineers Symposium was held in Tianjin,China on July 12–15,*** symposium was hosted by the Collaborative Innovation Center of Chemical Science and Engineering(Tianjin),and School of C... 详细信息

关键词：化学科学工程师中国化学工程教育国家工程研究中心蒸馏技术论文天津大学